Hello.
Exists a large reflector he does a >15.4 "-16:10-TFT< completely covers (~40cm)?
Were rectangular best. Ideally 16 to 10.
I would like to use this lamp:
http://www.atlantalightbulbs.com/ecart/nw012104/UHI-S400DDUSHIO.htm
But without condenser and first Fresnel lens (costs light). Therefore I want to use a large reflector.
Consider that this lamp has an arc of 27 mm! At small reflectors, this should be more negative than at large reflectors.
Explanation: In the middle of a small reflector, a 27 mm arc is proportionately smaler than in a large reflector. Or not? Actually logical.
In a large reflector, so this lamp should be much more effective than in a small reflector.
Therefore I regard the search for a large reflector as important.
The reflector should be ellipsoid well. Otherwise more light is lost.
=> http://www.thestagecrew.com/Pages/Chapters/stagecraft_lights/lighting_parts/reflectors.html
To the display, controller etc.:
What kind of HDTV set gives it currently? Controller, display, remote control, cable etc.. Like this at the beginning of Minoten (or better).
The Kontron controller "CRTtoLCD 7" has no more HDCP decoding suddenly. Cost license fees.....
The controller "CRTtoLCD 7" is use only for industrialists (not for home electronics) and these do not need a HDCP decoding
.
Why? He would be ideal (with HDCP).
Best wishes,
Tobias Claren
Exists a large reflector he does a >15.4 "-16:10-TFT< completely covers (~40cm)?
Were rectangular best. Ideally 16 to 10.
I would like to use this lamp:
http://www.atlantalightbulbs.com/ecart/nw012104/UHI-S400DDUSHIO.htm
But without condenser and first Fresnel lens (costs light). Therefore I want to use a large reflector.
Consider that this lamp has an arc of 27 mm! At small reflectors, this should be more negative than at large reflectors.
Explanation: In the middle of a small reflector, a 27 mm arc is proportionately smaler than in a large reflector. Or not? Actually logical.
In a large reflector, so this lamp should be much more effective than in a small reflector.
Therefore I regard the search for a large reflector as important.
The reflector should be ellipsoid well. Otherwise more light is lost.
=> http://www.thestagecrew.com/Pages/Chapters/stagecraft_lights/lighting_parts/reflectors.html
Is there a point where the light leaves parallel?
To the display, controller etc.:
What kind of HDTV set gives it currently? Controller, display, remote control, cable etc.. Like this at the beginning of Minoten (or better).
The Kontron controller "CRTtoLCD 7" has no more HDCP decoding suddenly. Cost license fees.....
The controller "CRTtoLCD 7" is use only for industrialists (not for home electronics) and these do not need a HDCP decoding
.Why? He would be ideal (with HDCP).
Best wishes,
Tobias Claren
Semispherical reflector with arc bulb at at half of the centre of sphere gives beam of parallel rays. I made such reflector and got excellent results. The details of the design of such reflector, screen shots and mathematical aspects may be seen from my web page http://www.drtsolutions.com/Projector.htm The results have been appreciated even by experts.
Hey!
In the second link, the examples for parabolic & spherical reflectors are not accurate enough.
Yes, that could be parabolic, but there are lots of other parabolic shapes. This for example is a parabolic reflector too, and it looks very efficient.
The drawbacks with parabolic: 1) you’ll have to get the reflector as large as the screen’s diagonal or 2) use a negative lens to spread the light across the lcd.
The spherical example is ok, but has no relevance to the description. It shows the light source placed at the reflector’s focal point instead of its center.
Also it omits the fact that, with spherical reflectors, it’s easy to add a condenser that will further increase the light output.
Now to elliptical ones; no, there is no point where such a reflector will yield a parallel beam (ramkishan, this is also the case with spherical ones – example).
For such a bulb I might use an elli reflector like this. The dimensions are in mm and not accurate, just fore reference. But there is a catch, the bulb is “naked”, there is no outer shell, otherwise the distortions will totally kill the light output.
There is a financial issue too, making such a reflector as a one-off will cost ‘an arm and a leg’. The surface must be electroliticaly etched to near perfect precision. This technique is used to make F1 engine components.
My opinion, stick with spherical reflectors, they are easily, cheaply available and with a matched condenser will yield as much light as the elliptical ones, but without all the fuss.
In the second link, the examples for parabolic & spherical reflectors are not accurate enough.
Yes, that could be parabolic, but there are lots of other parabolic shapes. This for example is a parabolic reflector too, and it looks very efficient.
The drawbacks with parabolic: 1) you’ll have to get the reflector as large as the screen’s diagonal or 2) use a negative lens to spread the light across the lcd.
The spherical example is ok, but has no relevance to the description. It shows the light source placed at the reflector’s focal point instead of its center.
Also it omits the fact that, with spherical reflectors, it’s easy to add a condenser that will further increase the light output.
Now to elliptical ones; no, there is no point where such a reflector will yield a parallel beam (ramkishan, this is also the case with spherical ones – example).
For such a bulb I might use an elli reflector like this. The dimensions are in mm and not accurate, just fore reference. But there is a catch, the bulb is “naked”, there is no outer shell, otherwise the distortions will totally kill the light output.
There is a financial issue too, making such a reflector as a one-off will cost ‘an arm and a leg’. The surface must be electroliticaly etched to near perfect precision. This technique is used to make F1 engine components.
My opinion, stick with spherical reflectors, they are easily, cheaply available and with a matched condenser will yield as much light as the elliptical ones, but without all the fuss.
This is obvious pragmatic conclusion. I have used a bigger size 400W metal halide lamp as it costs hardly $15. But due to longer arc lengh, the simple spherical reflector can not achieve perfect beam of parallel rays as the light source is not a point. Our objective has been to enhance the number of rays which gives rise to higher lumens and accordingly we enclosed the bulb in a box (that of original OHP) for easier extraction of heat as well as easy flow of light. The design becomes akin to bulb assembly of commercial projectors. The bowl reflector cost only $5 including nickel plating. The thermal and optical circuits were aptly separated with very high brightness and lowest heating of fresnel and LCD. The DIY solutions can be stretched only to the extent beyond which the enhancement in quality is not commensurate with costs including the cost of time involved.mkl2 said:
Interesting. 112 inches? At 4 to 3? Which breadth and height is this?
I only can use the following things:
Relationship: 16 to 10
Diagonal: 15.4 inches
I want at least 92 inches as projection size. These are 200 cm of 125 cm.
I am a little critical.
Which "experts" have praised the construction?
There are not worldwide real > experts < in any forum.
These are tinkers. Experts could build something from available industrial visual parts.
To the need of something like that: http://store.artcity.com/tes-25.html
For the 15.4 inches TFT these are 12 inches of reflector too smally. In addition, unfortunately, it is dull inside. It should get high-gloss polished inside.
@mkl2
Yes, I was also a little sceptical with the drawings. But this is a classic parabolic form. Think of the satellite antennae.
A parabolic reflector like the one of me interlinked the one shall be parallel for it shines. But it lets much more light pass. Over and under the burner everything is free, light is lost there. Your interlinked parabolic reflector is much better. Where do I get such a reflector? A well indissoluble problem remains the longish arc. The arc does not only consist of a single point. The reflector would so more smally be worse around this. Bigger the reflector smaller the relationship.
Example: 27 mm arc in a 5 cm reflector is much worse than a 27 mm arc in a 40 cm reflector. If one uses a 15.4 inches TFT, then the reflector does not work either more smally (condenser/Frensell is a bad solution). The disadvantage of the larger TFT area is here an advantage since one can compensate for the disadvantage of a longer arc a little with a larger reflector.
Yes, I always thought, too, that a deep reflector is better than a not deep one (less light loss). But it must shine parallel.
The left picture in your second png does not have any perfect parallel radiation. Only a part of the reflected light is reflected parallel.
Your first png has a good parallel irradiation:
Your third picture ("This") does not have at all any parallel light irradiation this shall be good for which lamp??
"Naked"? Therefore "stripped" like one in the German forum says? I want to use this lamp:
http://www.ushio.com/det_gl_ultraarc.htm
Shall I these really "stripped"?
Yes, to be had a special reflector built has expensively. A reflector CAD programmer offered a calculation for 60.21 dollars.
But then, I still do not have a reflector. I should have a stamp and a pressing form for a ton press.
A 12 ton press costs 107.18 dollars: http://cgi.ebay.de/Werkstattpresse-...592890776QQcategoryZ54056QQrdZ1QQcmdZViewItem
A 20 ton press costs 143 dollars: http://cgi.ebay.de/Werkstattpresse-...592890781QQcategoryZ54056QQrdZ1QQcmdZViewItem
Then on the longish arc you optimize, is questionable and whether that.
The reflector does not have to have "perfect precision". It is not all about an astronomical telescope here!
I have seen none spherical reflectors unlike parabolic yet.
We should use such a reflector with a diameter of the diagonal of the TFT if possible:
Is there to buy such deep parabolic reflectors? Does anybody know a source?
If necessary inside dull. This one then will be polished.
I only can use the following things:
Relationship: 16 to 10
Diagonal: 15.4 inches
I want at least 92 inches as projection size. These are 200 cm of 125 cm.
I am a little critical.
Which "experts" have praised the construction?
There are not worldwide real > experts < in any forum.
These are tinkers. Experts could build something from available industrial visual parts.
To the need of something like that: http://store.artcity.com/tes-25.html
For the 15.4 inches TFT these are 12 inches of reflector too smally. In addition, unfortunately, it is dull inside. It should get high-gloss polished inside.
@mkl2
Yes, I was also a little sceptical with the drawings. But this is a classic parabolic form. Think of the satellite antennae.
A parabolic reflector like the one of me interlinked the one shall be parallel for it shines. But it lets much more light pass. Over and under the burner everything is free, light is lost there. Your interlinked parabolic reflector is much better. Where do I get such a reflector? A well indissoluble problem remains the longish arc. The arc does not only consist of a single point. The reflector would so more smally be worse around this. Bigger the reflector smaller the relationship.
Example: 27 mm arc in a 5 cm reflector is much worse than a 27 mm arc in a 40 cm reflector. If one uses a 15.4 inches TFT, then the reflector does not work either more smally (condenser/Frensell is a bad solution). The disadvantage of the larger TFT area is here an advantage since one can compensate for the disadvantage of a longer arc a little with a larger reflector.
Yes, I always thought, too, that a deep reflector is better than a not deep one (less light loss). But it must shine parallel.
The left picture in your second png does not have any perfect parallel radiation. Only a part of the reflected light is reflected parallel.
Your first png has a good parallel irradiation:
Your third picture ("This") does not have at all any parallel light irradiation this shall be good for which lamp??
"Naked"? Therefore "stripped" like one in the German forum says? I want to use this lamp:
http://www.ushio.com/det_gl_ultraarc.htm
An externally hosted image should be here but it was not working when we last tested it.
Shall I these really "stripped"?
Yes, to be had a special reflector built has expensively. A reflector CAD programmer offered a calculation for 60.21 dollars.
But then, I still do not have a reflector. I should have a stamp and a pressing form for a ton press.
A 12 ton press costs 107.18 dollars: http://cgi.ebay.de/Werkstattpresse-...592890776QQcategoryZ54056QQrdZ1QQcmdZViewItem
A 20 ton press costs 143 dollars: http://cgi.ebay.de/Werkstattpresse-...592890781QQcategoryZ54056QQrdZ1QQcmdZViewItem
Then on the longish arc you optimize, is questionable and whether that.
The reflector does not have to have "perfect precision". It is not all about an astronomical telescope here!
I have seen none spherical reflectors unlike parabolic yet.
We should use such a reflector with a diameter of the diagonal of the TFT if possible:
Is there to buy such deep parabolic reflectors? Does anybody know a source?
If necessary inside dull. This one then will be polished.
ramkishan, I’m not pragmatic, just realist. The real problem is with the bulb’s arc length and there is only one workaround, the use of short arc bulbs. Unfortunately these have one or more of the following downfalls: are expensive, underpowered, hard to find or have a short lifespan.
Yes, that’s a classic parabolic shape... for a satellite dish 🙂 (witch, on a side note, works just like a reflector, but in reverse – it focuses a parallel beam into a single point). When talking about reflectors first shape that pops in mind is a KC Daylighter or a Hella Rallye line projector (if you prefer) or just a common flashlight reflector.
I don’t know where you can buy such a large reflector, that’s only an OSLO simulation.
Yes, that’s what I’m saying, spherical reflectors don’t behave like parabolic ones, as ramkishan stated.
My third drawing is an ellipsoid reflector and will work only with a field fresnel, that’s why the rays are not parallel. And this is what I meant with the bulb being “naked”.
Yes, that’s a classic parabolic shape... for a satellite dish 🙂 (witch, on a side note, works just like a reflector, but in reverse – it focuses a parallel beam into a single point). When talking about reflectors first shape that pops in mind is a KC Daylighter or a Hella Rallye line projector (if you prefer) or just a common flashlight reflector.
I don’t know where you can buy such a large reflector, that’s only an OSLO simulation.
Yes, that’s what I’m saying, spherical reflectors don’t behave like parabolic ones, as ramkishan stated.
My third drawing is an ellipsoid reflector and will work only with a field fresnel, that’s why the rays are not parallel. And this is what I meant with the bulb being “naked”.
I don’t know where you can buy such a large reflector, that’s only an OSLO simulation.
All other lamps are too expensive.
However, the 27 mm arc must be compensated for.
The best would be a reflector in TFT size (diagonally).
What can this "Oslo" do? Can anybody calculate a reflector with a good software here? If possibly rectangular with approx. 35 x 22cm.
How this one then would be built is another thing.
In the ideal case the reflector produces a bright >rectangular< spot in the size of the reflector on the wall.
Is it physically possible at all to let the longish arc flow into a reflector calculation (for parallel beam)?
Or can a reflector have only a round focus?
I could ask this question in a new Thread.
Yes, these are the reasons why I want to use these 400 W USHIO metal halide lamps.mkl2 said:
All other lamps are too expensive.
mkl2 said:
However, the 27 mm arc must be compensated for.
The best would be a reflector in TFT size (diagonally).
What can this "Oslo" do? Can anybody calculate a reflector with a good software here? If possibly rectangular with approx. 35 x 22cm.
How this one then would be built is another thing.
In the ideal case the reflector produces a bright >rectangular< spot in the size of the reflector on the wall.
Is it physically possible at all to let the longish arc flow into a reflector calculation (for parallel beam)?
Or can a reflector have only a round focus?
I could ask this question in a new Thread.
Tobias Claren
(1) 120” width at 16 to 9 format. This width covers the wall opposite the projector . The arrangement in the room has been given in Fig 6 and 7 in my web page http://www.drtsolutions.com/Projector.htm
(2) Mr. Alan Astaples of diyprojectorcompany.com may be regarded as an expert in DIY projectors due to long exposure and interactions in the field. I had several mail exchanges with him. Extract from his comments are furnished at my web page and are reproduced below :-
Appreciation by Experts
Several visitors have appreciated our work. Above all we cherish the following comments of well known expert Mr. Alan Astaples of diyprojectorcompany.com whose comments vide link http://www.diyprojectorcompany.com/other/links.htm are reproduced below:-
Ram is a terrific person and is one of our most enthusiastic builders. Not only that, but his results images are very good ... if you want to see a very large projection screen in action, check out his page!
Thanks a lot Mr. Alan for your magnanimity and large heart.
(3) I have made the reflector using a bowl from the kitchen and to improve the reflectivity I got it buffed and nickel plated to improve the reflectivity.
(4) For a custom built DIY projector, the spherical reflector is cheapest and easy to obtain. The brightness was tremendously improved after few adjustments and it is sufficient for dark viewing. Hence we do not feel need of any other reflector.
(5) On account of large arc length of cheap and large metal halide lamps, concentrated beam of parallel rays can not be obtained. Anyway due to sufficient brightness, the picture quality is quite satisfying for normal viewing.
Mkl2
You are perfectly right that real problem is long arc length and at present there is not cheaper option for DIY community.
(1) 120” width at 16 to 9 format. This width covers the wall opposite the projector . The arrangement in the room has been given in Fig 6 and 7 in my web page http://www.drtsolutions.com/Projector.htm
(2) Mr. Alan Astaples of diyprojectorcompany.com may be regarded as an expert in DIY projectors due to long exposure and interactions in the field. I had several mail exchanges with him. Extract from his comments are furnished at my web page and are reproduced below :-
Appreciation by Experts
Several visitors have appreciated our work. Above all we cherish the following comments of well known expert Mr. Alan Astaples of diyprojectorcompany.com whose comments vide link http://www.diyprojectorcompany.com/other/links.htm are reproduced below:-
Ram is a terrific person and is one of our most enthusiastic builders. Not only that, but his results images are very good ... if you want to see a very large projection screen in action, check out his page!
Thanks a lot Mr. Alan for your magnanimity and large heart.
(3) I have made the reflector using a bowl from the kitchen and to improve the reflectivity I got it buffed and nickel plated to improve the reflectivity.
(4) For a custom built DIY projector, the spherical reflector is cheapest and easy to obtain. The brightness was tremendously improved after few adjustments and it is sufficient for dark viewing. Hence we do not feel need of any other reflector.
(5) On account of large arc length of cheap and large metal halide lamps, concentrated beam of parallel rays can not be obtained. Anyway due to sufficient brightness, the picture quality is quite satisfying for normal viewing.
Mkl2
You are perfectly right that real problem is long arc length and at present there is not cheaper option for DIY community.
I mean experts in the area of the reflector production, the reflector design (CAD), the optics etc. ..
As you know, making of DIY Projector is an assembly of available components. The ultimate quality of image is outcome of the inherent quality constrant of the components. The large sizes of arc lenth of bub, LCD, fresnel lenses, triplet need only matching quality of reflector. The DIY process does not require and can not afford sophisticated design of reflector on CAD as the quantity involved is very small. Even if some one designs, manufacturing will not be possible and even if produced, other matching compnents can not be obtained. In this context, the experts of DIY Projectors are those who have acquired knowldege and experience in assembly of such projectors using available components.Tobias Claren said:
My wife is a mechanical engineer and very adept with CAD. Our main home computer has a couple of different CAD programs on it that she could draw someting up on, and I'm sure she could do it fairly quickly. So getting drawings wouldn't be an issue, the question is where could we get such a reflector made?
This is only person I know of that had good luck using a fairly long arc lamp in an
ellipsoidal reflector.
http://www.hommie.net/construction.htm
I've not been able to find any place online that sells the lamp reflector he used.
ellipsoidal reflector.
http://www.hommie.net/construction.htm
I've not been able to find any place online that sells the lamp reflector he used.
Yes, available components. But this being able to be also optical reflectors. This does not have to be misused kitchen utensils.
Your reflector is too small for my 15.4 inches TFT. This is not possible.
This here also = > http://store.artcity.com/tes-25.html is an "available component".
Which diameter does your bowl have? Would not this reflector be better if one polishes it inside?
The quality improvement of kitchen utensils (5 dollar bowls) to optical reflectors is in all probability good.
Your reflector is too small for my 15.4 inches TFT. This is not possible.
This here also = > http://store.artcity.com/tes-25.html is an "available component".
Which diameter does your bowl have? Would not this reflector be better if one polishes it inside?
I have an offer to design a reflector for approx. 60 dollars. A company with a CNC machine could mill a form.
The quality improvement of kitchen utensils (5 dollar bowls) to optical reflectors is in all probability good.
No (not known to me) DIY expert has used a large (Covering the whole TFT) optical reflector. So these have no knowledge or experience.
Yes, available components. But this being able to be also optical reflectors.
What is your solution to get single point light source of sufficient power? or what would be the shape of your designed reflector suiting to given arc lenth of metal halide bulb? What should be mounting of bulb? How DIY community can get such light engine at affordable prices?
Which diameter does your bowl have? Would not this reflector be better if one polishes it inside?
The diameter of my bowl reflector is 11". I got the bowl buffed and nickel plated to improve the reflectivity. The brightness is quite sufficient even at 50% default setting of LCD for an image of 120" at a distance of 22 feet on wall screen painted white with matt paint. I have not removed the antiglare film of the LCD. All these factors can further boost the brightness. Hence I don't feel need of spending more time or money on the reflector.
I have an offer to design a reflector for approx. 60 dollars. A company with a CNC machine could mill a form.
The DIY part suppliers like diyprojectorcompany.com and lumenlab.com should note your offer and get suitable reflectors designed, tested and made availble in their online stores. It would be quite helpful to DIY community.
The quality improvement of kitchen utensils (5 dollar bowls) to optical reflectors is in all probability good.
I could have got even silver plated and could have experimented with other bowls in the market but since brightness is more than enough, the spare time may be spent on other things.
No (not known to me) DIY expert has used a large (Covering the whole TFT) optical reflector. So these have no knowledge or experience.
The exact optical circuit and its mathematics would be quite complex considering the specifications and placement of fresnels, LCD and projection lens. In commercial projector they are using 10 to 15 lenses including aspherical lenses, focusing lenses, several compensators, telecentric lens to produce more vivid image by limiting distortion astigmatism and spherical aberration. They use ultra low dispersion glass to minimize chromatic aberration especially along the edges of the projected image for clear projection. They have several consideration to ensure superior colour fidelity through efficient light processing through even patented optical box technology.
Their all other components equally superior and matched.
The average DIY entrepreneur needs simple components and process to make a workable projector at home. He may not have any knowledge or education of science and technology involved in the Projector. If we know better, we should find such solutions for him which he can easily implement.
Edmond Optics manufacturs and supplies precision polished parabolic reflectors of 12", 18" and 24" diameters vide details at linkTobias Claren said:
http://www.edmundoptics.com/onlinecatalog/displayproduct.cfm?productID=1364#Products
"Consider that this lamp has an arc of 27 mm! At small reflectors, this should be more negative than at large reflectors.
Explanation: In the middle of a small reflector, a 27 mm arc is proportionately smaler than in a large reflector. Or not? Actually logical.
In a large reflector, so this lamp should be much more effective than in a small reflector.
Therefore I regard the search for a large reflector as important.
The reflector should be ellipsoid well. Otherwise more light is lost."
Greeting Tobias. I agree completely. The advantages for wuxga pj make the difficulties worth it.
I have searched for several months and the best I found was this:
http://www.optiforms.com/3000products/31310elliptical/313112ellipGEO_e508.html
but they are rather expensive.
Hope this helps.
Boyd
Explanation: In the middle of a small reflector, a 27 mm arc is proportionately smaler than in a large reflector. Or not? Actually logical.
In a large reflector, so this lamp should be much more effective than in a small reflector.
Therefore I regard the search for a large reflector as important.
The reflector should be ellipsoid well. Otherwise more light is lost."
Greeting Tobias. I agree completely. The advantages for wuxga pj make the difficulties worth it.
I have searched for several months and the best I found was this:
http://www.optiforms.com/3000products/31310elliptical/313112ellipGEO_e508.html
but they are rather expensive.
Hope this helps.
Boyd
@v1d9uy
What is so funny? If we would laugh here about every Improvement wills, there would be no ready DIY projector yet to this day.
The earth is a ball: LOL
@doublejack
This sounds good. However, there are different programs for a mechanical and visual CAD. There are extra programs for the reflector calculation.
I have opened contribution to this topic one extra:
http://www.diyaudio.com/forums/showthread.php?s=&postid=860292#post860292
One (or several) have files only if we, there then exists the chance that somebody has the possibility someplace in the world of having anybody produce a reflector or a pressing die.
Perhaps somebody has access to a CNC machine. In the German forum somebody has already had a reflector milled.
Everybody could try to find a possibility. It is the most difficult to receive such a file or form.
@ramkishan
Your kitchen bowl and lamp fulfills your own requirements not (single luminous spot, special design on the arc etc.) either.
I can not make come true the technically at most feasible either but I can have a try more than the 5 dollar bowl.
The surface of your bowl does not look slippery. Does nickel not change the color? Visual (highly purified) aluminum is the best metal (apart from silver) for reflectors.
Since there is no economic alternative to the 400 watts Ushio, I want to use the 400 watts Ushio.
3D micro lamellae would be a solution for the long arc. But this would be effortful in the production. This not and one can press.
Perhaps every reflector could be milled. It depends on the price, whether this is worthwhile.
To be able to press a reflector, once form and stamp only must be milled.
One then could with a press (new for 100 to 150 dollars) try to press a reflector of an aluminium metal heated up. This is polished after that.
I am not for certain these offer what to me there.
I do not got for the 60 dollars know what I would be. The offer also only applies to me as a private person.
I had asked optimized like exactly this on the arc will be. And whether it is rectangular. No answer to it.
I do not trust the offer enough to give this 60 dollars.
What I get is unknown. I do not get any exact answer.
This costs much energy. Or I would like a greater picture at the same energy. Or a sheerer picture at the same energy.
But there also are 1 panel projectors:
[/img] http://www.diy-community.de/images/avatars/diy-beamer-profesionel_klei.jpg[/img]
We do not want to build a 3 panel projector or DLP projector.
One therefore may not this with these comparisons either.
The shown Movin 2001, however, is exactly as simple as the self-made ones in the construction.
E.g. a 10 cm objective of Lumenlab for 200 dollars: https://secure.lumenlab.com/shop/product.php?id=40
Particularly suitable for HDTV and large displays.
Would very good objectives have made you for her? No?
But Lumenlab has done it. We can try at least to receive a reflector design. Everybody then can try to have anybody produce it.
If we find a possibility/method of simply producing reflectors, then we offer the DIY entrepreneur a simple possibility with that of getting a reflector.
How everybody sees the reflector is not deep. The focal point lies in front of the reflector. Too much light is lost there.
@bvlad
Oh, excuse.
I wrote that a large ellipsoid reflector must be better.
But I rather meant a large deep >parabolic< reflector.
Somebody told me a ellipsoid reflector could never shine absolutely parallel. Or is this wrong? Main thing deep and a parallel beam.
Your expensive reflector does not have any reference to a parallel beam.
It has two focal points. This means that the light does not emit parallel.
What is so funny? If we would laugh here about every Improvement wills, there would be no ready DIY projector yet to this day.
The earth is a ball: LOL
@doublejack
This sounds good. However, there are different programs for a mechanical and visual CAD. There are extra programs for the reflector calculation.
I have opened contribution to this topic one extra:
http://www.diyaudio.com/forums/showthread.php?s=&postid=860292#post860292
One (or several) have files only if we, there then exists the chance that somebody has the possibility someplace in the world of having anybody produce a reflector or a pressing die.
Perhaps somebody has access to a CNC machine. In the German forum somebody has already had a reflector milled.
Everybody could try to find a possibility. It is the most difficult to receive such a file or form.
@ramkishan
Your kitchen bowl and lamp fulfills your own requirements not (single luminous spot, special design on the arc etc.) either.
I can not make come true the technically at most feasible either but I can have a try more than the 5 dollar bowl.
The surface of your bowl does not look slippery. Does nickel not change the color? Visual (highly purified) aluminum is the best metal (apart from silver) for reflectors.
Since there is no economic alternative to the 400 watts Ushio, I want to use the 400 watts Ushio.
3D micro lamellae would be a solution for the long arc. But this would be effortful in the production. This not and one can press.
Perhaps every reflector could be milled. It depends on the price, whether this is worthwhile.
To be able to press a reflector, once form and stamp only must be milled.
One then could with a press (new for 100 to 150 dollars) try to press a reflector of an aluminium metal heated up. This is polished after that.
I am not for certain these offer what to me there.
I do not got for the 60 dollars know what I would be. The offer also only applies to me as a private person.
I had asked optimized like exactly this on the arc will be. And whether it is rectangular. No answer to it.
I do not trust the offer enough to give this 60 dollars.
What I get is unknown. I do not get any exact answer.
That's a matter of opinion. I want to get by on only 250 watts if possible. Energy is expensive here. The part shall be on the whole day!
This costs much energy. Or I would like a greater picture at the same energy. Or a sheerer picture at the same energy.
Yes, projectors work for the industrialists according to a completely different principle.
But there also are 1 panel projectors:
[/img] http://www.diy-community.de/images/avatars/diy-beamer-profesionel_klei.jpg[/img]
An externally hosted image should be here but it was not working when we last tested it.
We do not want to build a 3 panel projector or DLP projector.
One therefore may not this with these comparisons either.
The shown Movin 2001, however, is exactly as simple as the self-made ones in the construction.
I also can use very good glasses.
E.g. a 10 cm objective of Lumenlab for 200 dollars: https://secure.lumenlab.com/shop/product.php?id=40
Particularly suitable for HDTV and large displays.
What I want are also "simple components and processes".
Would very good objectives have made you for her? No?
But Lumenlab has done it. We can try at least to receive a reflector design. Everybody then can try to have anybody produce it.
If we find a possibility/method of simply producing reflectors, then we offer the DIY entrepreneur a simple possibility with that of getting a reflector.
I know these reflectors. I have spoken on the phone to Edmund Optics exactly because of these reflectors.ramkishan said:
How everybody sees the reflector is not deep. The focal point lies in front of the reflector. Too much light is lost there.
@bvlad
Oh, excuse.
I wrote that a large ellipsoid reflector must be better.
But I rather meant a large deep >parabolic< reflector.
Somebody told me a ellipsoid reflector could never shine absolutely parallel. Or is this wrong? Main thing deep and a parallel beam.
Your expensive reflector does not have any reference to a parallel beam.
It has two focal points. This means that the light does not emit parallel.
On this matter, lot of interactions have already taken place vide http://www.diyaudio.com/forums/showthread/t-29036.html which would be worth going through
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