Recent content by HexNuclei

Thank you all for your input, it's been really helpful and I think I have finally gotten somewhere. I've slightly redesigned my projection film. As only the top part of the dome needed clear projection, I've cut a whole at the top of the dome and inserted my slide. This makes it a flat slide...

I tried using a 50mm focal length convex lens today and it worked close to the film. I'm going to try using a shorter focal length to see whether I can close the distance and if that works, then look at building a focus system. Any advice?

Thanks for your comment. 1- Interesting. Because it works with a magnifying glass, I wouldn't have thought the light is an issue. Could this be the case or am I wrong? 2 - I can probably 3d print a mechanism to help with zoom, I reckon if I could a lens that works, I can design a mechanism to...

Thank you :) Hope it makes more sense. https://ibb.co/hYV42Q2 Light>2-4cm gap>hemisphere film>smallest gap possible>lens>1.5-2.5m gap>projection screen The screen is a flat surface, I only need the top 2 or so centimeter radius reflecting sharply, the rest can be blurry I don't mind. The...

I need to design a mini projector as a part of a project I am working on. The body of the projector is approximately 7 inch tall and 5 inch wide. I don't know what kind of a lens I need to ensure the projection is sharp and crisp (it is only black and white writing). I know I would need a zoom...