NEW projector from INDIA - Page 4

budhi · 24th October 2006, 09:06 AM

pcaddict,
let me share some jugaad with you all
Dont get stuck with the single fresnelor no fresnel problemFresnel is required to intensify or collect the lightand send it to the Lcd then stop it from scattering once again and send it to the projection lens,it actually increases the intensity a lot you will have to buy a double power bulb if you dont use a fresnel which means double heat weight powerconsumtion and other problems.
The final image depends on the quality of the main fresnel this is the one in front of the lcd (between lcd and lens) Use your good fresnel for this.use an ordinary fresnel available in stationary shops in A3 size for about Rs 100/-!!!! as the lens required to condense light, these are called Page magnifiers or map magnifiers only problem is they are not very think so you will need to make a simple plastic or wooden frame to support it tight.
And Remember the most important thing-All fresnel grooves have to point away from the lcd (plain side towards the LCD) otherwise you are doing more harm than good ie scattering the light, instead of collecting it.

mastero · 24th October 2006, 06:01 PM

Hello all,

After doin intense search and research .. i have found a supplier in India for Optical Acrylic Fresnel lens 220mm FL and 330mmm FL and triplet lens with 315mm FL. (Barrel dia 74mm)

Its a perfect match.

I am waiting for my set ..... will let you all know how it is..

Cheers
Mastero

cromaclear-crt · 26th October 2006, 07:50 AM

Hi budhi

Please can you tell where you got the parabolic reflector

Thanks

budhi · 26th October 2006, 09:35 AM

Hi cromaclear-crt
I got the parabolic reflector from the local lights shop, all light fittings whether they are fluroscent or halogen or metal hallide come with mirror polished reflectors in metal, you can even buy spares, but you might have to make adjustments for your bulb size.

mrcoolbuddy · 26th October 2006, 09:45 AM

Hi Maks,

Im also from Bangalore...
Can u tell amy place where i can get Mettal halide lamps and the ballast for it?

Thanks,
Cool

maxlove57 · 26th October 2006, 12:12 PM

sir can i get address of the place from where i can get the fresnel lence please please

mrcoolbuddy · 27th October 2006, 10:58 AM

Hi All,

Can you please give me the specifications for the fresnel lens, the condensor lens and the final Focusing Lens?

Wats the diameter, width, height, focal length any other specifications etc....

Does anybody where in bangalore we get all these cheaply?

Thanks,
Cool

budhi · 28th October 2006, 10:16 AM

this is link to the calculator that lets you figure out what you will get if you put all the things you have, together.
Mind the units carefully otherwise you can land up with way off figures!!

http://www.diyprojectorcompany.com/t...calculator.htm

pcaddict · 28th October 2006, 01:04 PM

hi budhi,

Yes, i bought the page magnifier lens and it cost 120/- here in chennai. Can you tell me again, where to place this lens between (light & LCd) OR (LCD and triplet).

Also, u say smooth side should see the LCd, am I correct?????

pcaddict · 28th October 2006, 01:29 PM

The lens that I am using is not triplet...but some other thing.....from local crap market.....it doesn't seem work good.

Can you see where the triplet lens is available...is it available in local photo camera optic stores...

Or, should it be bought from US...

24th October 2006, 09:06 AM	#31
budhi diyAudio Member Join Date: Aug 2005	Finding fresnel! pcaddict, let me share some jugaad with you all Dont get stuck with the single fresnelor no fresnel problemFresnel is required to intensify or collect the lightand send it to the Lcd then stop it from scattering once again and send it to the projection lens,it actually increases the intensity a lot you will have to buy a double power bulb if you dont use a fresnel which means double heat weight powerconsumtion and other problems. The final image depends on the quality of the main fresnel this is the one in front of the lcd (between lcd and lens) Use your good fresnel for this.use an ordinary fresnel available in stationary shops in A3 size for about Rs 100/-!!!! as the lens required to condense light, these are called Page magnifiers or map magnifiers only problem is they are not very think so you will need to make a simple plastic or wooden frame to support it tight. And Remember the most important thing-All fresnel grooves have to point away from the lcd (plain side towards the LCD) otherwise you are doing more harm than good ie scattering the light, instead of collecting it.

26th October 2006, 12:12 PM	#36
maxlove57 diyAudio Member Join Date: Oct 2006	fresnel lence sir can i get address of the place from where i can get the fresnel lence please please

28th October 2006, 10:16 AM	#38
budhi diyAudio Member Join Date: Aug 2005	Important Info For All Builders Very Useful this is link to the calculator that lets you figure out what you will get if you put all the things you have, together. Mind the units carefully otherwise you can land up with way off figures!! http://www.diyprojectorcompany.com/t...calculator.htm

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24th October 2006, 06:01 PM	#32
mastero diyAudio Member Join Date: Apr 2006 Location: jmhj	Hello all, After doin intense search and research .. i have found a supplier in India for Optical Acrylic Fresnel lens 220mm FL and 330mmm FL and triplet lens with 315mm FL. (Barrel dia 74mm) Its a perfect match. I am waiting for my set ..... will let you all know how it is.. Cheers Mastero

26th October 2006, 07:50 AM	#33
cromaclear-crt diyAudio Member Join Date: Jun 2005 Location: n/a	Hi budhi Please can you tell where you got the parabolic reflector Thanks

26th October 2006, 09:35 AM	#34
budhi diyAudio Member Join Date: Aug 2005	Hi cromaclear-crt I got the parabolic reflector from the local lights shop, all light fittings whether they are fluroscent or halogen or metal hallide come with mirror polished reflectors in metal, you can even buy spares, but you might have to make adjustments for your bulb size.

26th October 2006, 09:45 AM	#35
mrcoolbuddy diyAudio Member Join Date: Oct 2006	Hi Maks, Im also from Bangalore... Can u tell amy place where i can get Mettal halide lamps and the ballast for it? Thanks, Cool

27th October 2006, 10:58 AM	#37
mrcoolbuddy diyAudio Member Join Date: Oct 2006	Hi All, Can you please give me the specifications for the fresnel lens, the condensor lens and the final Focusing Lens? Wats the diameter, width, height, focal length any other specifications etc.... Does anybody where in bangalore we get all these cheaply? Thanks, Cool

28th October 2006, 01:04 PM	#39
pcaddict diyAudio Member Join Date: Jul 2005 Location: 404 Not Found	hi budhi, Yes, i bought the page magnifier lens and it cost 120/- here in chennai. Can you tell me again, where to place this lens between (light & LCd) OR (LCD and triplet). Also, u say smooth side should see the LCd, am I correct?????

28th October 2006, 01:29 PM	#40
pcaddict diyAudio Member Join Date: Jul 2005 Location: 404 Not Found	The lens that I am using is not triplet...but some other thing.....from local crap market.....it doesn't seem work good. Can you see where the triplet lens is available...is it available in local photo camera optic stores... Or, should it be bought from US...

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