Quote:
Originally Posted by martin417
Are you absolutely sure that the robot in question used a laser? Many people see a small red light and assume laser, even though no coherent light is emitted. For instance, Many people assume that optical mice use lasers. They do not, only a red LED focused by a lens. Most optical encoders do not use lasers, but LEDs. It is very likely that what you saw was an LED.
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I will go back and review the photos I took of the bot. As of now (which is why I posted it) it resembled a laser diode sinked in a brass heat sink and mounted. The spot was nearly a perfect rectangle/square and it had that funky interference pattern speckle that I have come to associate with lasers.
But as you said... I never did ask
