Recent content by stg

@blue_leaf77 Sounds like you got it just right! And since I have the ability to amp up the light source about 50x, a filter that would only allow down to 2% of mostly collinear light through would be perfect and it would also only have to have filtering in one direction (which might be the case...

A parabolic mirror or lens is not quite practical in this case. The setup is a linear array visible light sensor on one end, and a led illuminated backlight on the other with a gap between them. The setup detects where and how much light is blocked by items within the gap, along the sensing...

Thank you! I feel silly now, not having thought of those! I'm finding a lot of such privacy screens cut to size, including from 3M - but no mention of what this type of material/filter/grating is called or how to go about finding the material, not a finished cut to size product with a frame or...

Hello! If one were to push uncollimated light through a tube of inner radius R and length L, coated with matte black - the maximum incidence angle it will allow through would be ATAN2(R, L). On the other end of the tube, only the "most collimated" fraction of light would exit - a very small...