Hiya
i heard about diy projectors but always thought they were ohp affairs after seeing some of the projectors people have made i want make my own
ive been reading on the site for a couple of weeks now i get basically how they work i just need some help with the numbers, i have excellent fabricarion skills i got an A in D&T so working with wood plastic metal precisely is no problem
also i got builders in the house atm so i got a whole slew of precision tools
this is going to be more of a proof of concept because the lcd i am using is gonna be a limiting factor it is reaaallly crappy, although i want to make a decent setup optics wise so i can just upgrade the lcd at a later date
LCD INFORMATION
SHARP LQ050A3AD01
the tech data sheet i found was in japanese couldnt view it i found one for a tft in the same line
TECH DATA
kinda sucky no info on response time or contrast ratio 🙁
ROOM DIMENSIONS
sorry its not too scale the greyed out areas is the possible spaces where i can place the prjector the red and blue lines denote the possible throw distance? not sure if its the right term
PRELIMINARY DESIGN
again sorry for not being to scale
PRELIMINARY PARTS LIST
Varifocal Lens Kit
Condenser
Looking for alternative light source i.e cheaper ive read something about dichroic or dichrocic or something like that sugestions?
i heard about diy projectors but always thought they were ohp affairs after seeing some of the projectors people have made i want make my own
ive been reading on the site for a couple of weeks now i get basically how they work i just need some help with the numbers, i have excellent fabricarion skills i got an A in D&T so working with wood plastic metal precisely is no problem
also i got builders in the house atm so i got a whole slew of precision tools
this is going to be more of a proof of concept because the lcd i am using is gonna be a limiting factor it is reaaallly crappy, although i want to make a decent setup optics wise so i can just upgrade the lcd at a later date
LCD INFORMATION
SHARP LQ050A3AD01
the tech data sheet i found was in japanese couldnt view it i found one for a tft in the same line
TECH DATA
kinda sucky no info on response time or contrast ratio 🙁
ROOM DIMENSIONS
An externally hosted image should be here but it was not working when we last tested it.
sorry its not too scale the greyed out areas is the possible spaces where i can place the prjector the red and blue lines denote the possible throw distance? not sure if its the right term
PRELIMINARY DESIGN
An externally hosted image should be here but it was not working when we last tested it.
again sorry for not being to scale
PRELIMINARY PARTS LIST
Varifocal Lens Kit
Condenser
Looking for alternative light source i.e cheaper ive read something about dichroic or dichrocic or something like that sugestions?
sorry for the double post dont know how to edit
i searched on the dichroic halogens theyre cheap bright but i heard something about the light angle that only lights the center of the screen.
to light the screen fully i need to put it like 400mm away but i want a small setup.
could somone help me out a little with the follow queries like point me to the right resources or search terms.
1.Could someone comment on my design weither im on the right lines or what, i know the drawing is crappy but any feedback woudl be appreciated.
2.How do i calculate distances denoted by the ? in my design based on the optics im planning on using i heard theres an equation somewhere.
3. If i use a dichroic lamp would bouncing the light of a mirror help with the light angle? Or does the condenser take care of this problem for me?
sorry for being such a noob you guys must get alot of us asking stupid questions
any help would be greatly appreciated
i searched on the dichroic halogens theyre cheap bright but i heard something about the light angle that only lights the center of the screen.
to light the screen fully i need to put it like 400mm away but i want a small setup.
could somone help me out a little with the follow queries like point me to the right resources or search terms.
1.Could someone comment on my design weither im on the right lines or what, i know the drawing is crappy but any feedback woudl be appreciated.
2.How do i calculate distances denoted by the ? in my design based on the optics im planning on using i heard theres an equation somewhere.
3. If i use a dichroic lamp would bouncing the light of a mirror help with the light angle? Or does the condenser take care of this problem for me?
sorry for being such a noob you guys must get alot of us asking stupid questions
any help would be greatly appreciated
hiya me again
i tried using the lumenlab calculator when it says
Distance from projector lens to screen in inches:
does that mean the distance to the projected image or the distance from the lcd panel to the lens
please help guys i have been searching but i cant find specicfic info i remeber seeing an equation someone posted up to help find out the distance between the optics and lcd panel but i cant find it now
i dont mean to sound impatient or rude its just that the builders are gonna leave next week with all their lovely shiny power tools they even got one of those laser levels which would make it sooo much easier
any help at all please anything
i tried using the lumenlab calculator when it says
Distance from projector lens to screen in inches:
does that mean the distance to the projected image or the distance from the lcd panel to the lens
please help guys i have been searching but i cant find specicfic info i remeber seeing an equation someone posted up to help find out the distance between the optics and lcd panel but i cant find it now
i dont mean to sound impatient or rude its just that the builders are gonna leave next week with all their lovely shiny power tools they even got one of those laser levels which would make it sooo much easier
any help at all please anything
Sheoul said:
It's the distance from the projected image.
I am not sure about the distance between the condenser and the fresnel, why don't you try it out? it should either be fresnel -> focal length of fresnel -> lamp or condenser.
The distance from your fresnel to the projection triplet should be the focal length of the fresnel.
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