ahhh help i need a lens
so the lens i am using is a singlet. it freakin sucks. but one reason it sucks is because i have only 1 fresnel; in front. i havent cut my split frenels yet.
so if anyone knows where i can get one locally. but i prolly wont find one. so than does anyone know where ican order one.
i also have a fan question
i have a fan blowing air on a block of wood without a hole cut in back of it. is this a problem. i dont think that cold air is getting anywhere. so my lcd is getting real hot.]
anyone know the maximum heat that a ps1 lcd can take
so the lens i am using is a singlet. it freakin sucks. but one reason it sucks is because i have only 1 fresnel; in front. i havent cut my split frenels yet.
so if anyone knows where i can get one locally. but i prolly wont find one. so than does anyone know where ican order one.
i also have a fan question
i have a fan blowing air on a block of wood without a hole cut in back of it. is this a problem. i dont think that cold air is getting anywhere. so my lcd is getting real hot.]
anyone know the maximum heat that a ps1 lcd can take
I have heard Amercians say they get fresnels from "Staples" not sure what this is myself. You could also go for a cheap page magnifyer, you can buy them in Australia from Chemists Stores and some Newsagents. Think you call Chemists Drug Stores in the U.S? Might want to wander into one and ask about them there mate.
Dunno what your PS1 screen can put up with heat wise other than to say if it starts getting black spots on the screen you are viewing, it is too hot LoL
Not really sure what you mean by the way you have your fan setup, maybe a picture or a rough scetch in Paintshop or even Paint would make this easier to understand 🙂
Dunno what your PS1 screen can put up with heat wise other than to say if it starts getting black spots on the screen you are viewing, it is too hot LoL
Not really sure what you mean by the way you have your fan setup, maybe a picture or a rough scetch in Paintshop or even Paint would make this easier to understand 🙂
HiLLBiLLY,
Staples is a large chain of office supply stores in the US, Canada, UK, and Germany. The page magnifiers (fresnels) people get there can be seen on their website here.
Staples is a large chain of office supply stores in the US, Canada, UK, and Germany. The page magnifiers (fresnels) people get there can be seen on their website here.
I got 2 of them for about $7 each - there nice looking, thick
and well made - and the size of a sheet of paper - 2x
magnification - the thickness is about that of a OHP
fresnel or about 3 CDs in thickness
I have yet to use them so I dont know how well they
will look - but they look nice
I figured it must have been some type of office supply company chain as people all over the US have reported they got them there. We have Office Works here but they dont have them lol,,,Chemist do but hey are garbagae, thick as two sheets of paper and half the size lol
help me i need a lens. all i am using now is a singlet, and it sucks
i need some kind of triplet or copy lens, does anyone know where i could get one locally
i need some kind of triplet or copy lens, does anyone know where i could get one locally
For a lens it is a long shot, but you could try local pawn shops or any surplus stores you have around. In Rhode Island there really isn't anything locally here so I'm stuck ordering online.
Anyone know what the focal length of those page magnifiers from Staples is? Thanks.
Anyone know what the focal length of those page magnifiers from Staples is? Thanks.
suggestions
triplets: The focal length you need depends on the LCD size, the throw distance you want, and the image size you want. Once you figure all those out, then surplusshed.com has some copy lenses you might look at. Or you might find an OHP at a yard sale, used business equipment store, school surplus sale, etc. If the OHP has a single lens an inch or two thick, that is a triplet. Probably around 325 mm fl. If the OHP has two lenses, then that is a duplet which would work much better than your current magnifying glass! (Just not quite as good as a triplet.) If you do gut an OHP, you can use the lens & the fresnels. (As long as the fresnels are big enough for your LCD.)
fresnels at office supply store: You can estimate focal length by focussing the image of a light bulb that's more that 30 feet away. (The further away, the better the estimate.) Then just measure the distance from the fresnel to the image. Numbers like "2X" and "3X" don't mean much because they are only valid at a certain (unknown) distance! If they list a Diopter strength, then fl = 1000/Diopters. When you get the fresnel outside, you can measure it precisely using the sun instead of a light bulb. Don't set anything on fire!
triplets: The focal length you need depends on the LCD size, the throw distance you want, and the image size you want. Once you figure all those out, then surplusshed.com has some copy lenses you might look at. Or you might find an OHP at a yard sale, used business equipment store, school surplus sale, etc. If the OHP has a single lens an inch or two thick, that is a triplet. Probably around 325 mm fl. If the OHP has two lenses, then that is a duplet which would work much better than your current magnifying glass! (Just not quite as good as a triplet.) If you do gut an OHP, you can use the lens & the fresnels. (As long as the fresnels are big enough for your LCD.)
fresnels at office supply store: You can estimate focal length by focussing the image of a light bulb that's more that 30 feet away. (The further away, the better the estimate.) Then just measure the distance from the fresnel to the image. Numbers like "2X" and "3X" don't mean much because they are only valid at a certain (unknown) distance! If they list a Diopter strength, then fl = 1000/Diopters. When you get the fresnel outside, you can measure it precisely using the sun instead of a light bulb. Don't set anything on fire!
past experience?
I just don't want anybody getting arrested for arson when the office supply people see them trying to measure a focal length in the parking lot!
I used to do this procedure out on our wooden deck, but it freaked out my wife to see the little bit of smoke from a short board propped up to match the angle of the sun. Now I go out to the gravel driveway and use a paving stone.
I just don't want anybody getting arrested for arson when the office supply people see them trying to measure a focal length in the parking lot!
I used to do this procedure out on our wooden deck, but it freaked out my wife to see the little bit of smoke from a short board propped up to match the angle of the sun. Now I go out to the gravel driveway and use a paving stone.
HAHA Guy
The women just don't understnad us fellas lol they must learn that small sacrifices must be made in the name of "science"
hehehe
Listen, Wanksta,
A good source of lenses is American Science and Surplus
Scroll down to the projection lenses section. You should be able to find what you need there.
Much success to your project!
Steamer
A good source of lenses is American Science and Surplus
Scroll down to the projection lenses section. You should be able to find what you need there.
Much success to your project!
Steamer
im thinking about this lens.
http://www.surplusshed.com/pages/item/l3297.html
its really cheap and seems like it could work with my psone setup.
but i need to know the average shipping time of surplus shed
http://www.surplusshed.com/pages/item/l3297.html
its really cheap and seems like it could work with my psone setup.
but i need to know the average shipping time of surplus shed
surplus shed
They get your shipment out pretty quick. Like the next day or so. Then it is up to UPS. I think you could pay for second or even next day shipping if you want to pay extra.
But what's wrong with those American Science lenses? They are cheap and the 5", 7.8", and 9" focal length projection lenses all have wider aperatures than that surplus shed lens. (It won't be easy to get much light through that surplus shed lens.) You need a wide aperature because the image of the lamp arc your fresnels create will be multiplied by the ratio of the fresnel focal lengths. For example, with 220 & 330 mm fl fresnels, it would be 1" * (330/220) = about 1.5" across. So you need at least a 38.1 mm aperature just to receive all the light.
If I were you, I'd go with the 9" focal length lens. That would give you a 62" diagonal image from 10 feet. You would be able to put your projector at the back of the room (much nicer) and still get a nice bright image. It would also be a good fit to a 330 mm fl field fresnel an inch or two before the LCD. (unsplit fresnels)
They get your shipment out pretty quick. Like the next day or so. Then it is up to UPS. I think you could pay for second or even next day shipping if you want to pay extra.
But what's wrong with those American Science lenses? They are cheap and the 5", 7.8", and 9" focal length projection lenses all have wider aperatures than that surplus shed lens. (It won't be easy to get much light through that surplus shed lens.) You need a wide aperature because the image of the lamp arc your fresnels create will be multiplied by the ratio of the fresnel focal lengths. For example, with 220 & 330 mm fl fresnels, it would be 1" * (330/220) = about 1.5" across. So you need at least a 38.1 mm aperature just to receive all the light.
If I were you, I'd go with the 9" focal length lens. That would give you a 62" diagonal image from 10 feet. You would be able to put your projector at the back of the room (much nicer) and still get a nice bright image. It would also be a good fit to a 330 mm fl field fresnel an inch or two before the LCD. (unsplit fresnels)
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