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Make image and project it? Answered

Hello everyone, I wanted for a while to make an image so that I can project but don't really know how to do it until recently I got this small like flashlight that actually projects an image.  Does anyone knows how to do it and the parts needed to build it. thanks

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rickharris

Best Answer 3 years ago

You can do this fairly easily

You will need:

A bright light source, perhaps a bright LED

A suitable transparent image

A convex lens

Arrange as in the picture below and position the lens to give a bright sharp image on the screen.

The second image shows how to use a non-transparent image using slightly more complicated construction

You need:

A box with a glass or clear plastic top

1 or 2 bright lights

A mirror

A convex lens

Arrange as in the second image below.

The light shines on the mirror and is reflected onto the image through the clear box top

The light reflects off the image back down to the mirror and out through the lens

The image will be a little dimmer then direct projection through a transparency but quite visible.

projector.jpgprojector 2.jpg
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Chamburnrickharris

Answer 3 years ago

Excellent I will start asap to look for the parts and hopefully but the end of this month I should have a working prototype. thanks for the information

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rickharrisChamburn

Answer 3 years ago

Your welcome. pick a best answer to close the question :-)

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-max-

3 years ago

Just stick a big magnifying lens in front of your phone screen. Tada, el-cheapo phone projector!

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Chamburn-max-

Answer 3 years ago

Lol never thought of that but I am looking for something which is very simple.

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-max-Chamburn

Answer 3 years ago

Umm, I don't know how much simpler it can possibly get! :) That method should work with any well illuminated photo, screen, etc.

You might want to study up a little on "virtual" and "real" images, and optics in general. I am not the expert in optics, but I recall vaguely from physics classes that Virtual images refer to basicly images that exists "inside" lenses and mirrors. Those are what you see in a mirror, or through a telescope or something. The image existing on the surface of a lens is not really there, same with mirrors. Hence "virtual." However, to turn this into a real image, that is, one that can be projected, you need additional optics.

The link below is to khan academy, that that is his playlist all about optics and cool stuff.

https://www.khanacademy.org/science/physics/geomet...

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Downunder35m

3 years ago

You get them for cars too, a LED lamp to stick on your door frame and when you open the door it shows a logo on the street.
Look up how a film or dia projector works, it is the same thing only that the image used is quite tiny.

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ChamburnDownunder35m

Answer 3 years ago

Yes I know about the car projection ones but I want to build one of my own. Thanks for the search criterias.