I've got an idea to fix the crappy automatic brightness sensor on my Android phone. Will it work / screw anything up? [more inside]
posted by anthill on Nov 2, 2011 - 8 answers

Why doesn't the speckle pattern that you see around the source of a laser change when you move your head, and what causes the pattern? [more inside]
posted by Bugbread on Nov 14, 2010 - 3 answers

Help me solve an optical puzzle. How might I make this fictional camera obscura work, given the parameters of my fictional location? [more inside]
posted by np312 on Jul 6, 2010 - 12 answers

Let's say I'm toying with the idea of making my own scanner for negative film. I've found a suitable sensor, and the rest of the mechanism looks manageable. Can I get a suitable light source that will compensate for the orange mask, at a reasonable price? [more inside]
posted by Joakim Ziegler on Sep 20, 2007 - 17 answers