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INCREASE LIGHT by SQUEEZING LEDs with a FRESNEL
CHEAP INTERFEROMETER FOR OPTICAL TESTING OF TELESCOPE MIRRORS.
Giant Fresnel Lens Deathray: An Experiment in Optics
DIY 2k(2560x1440) LED beam projector
Simple Macro Lens for iPad/iPhone/iPod
How to turn a mouse into an optical Pen (OPTIPEN)
Homemade laser module
Drone (quad) Search Light For Night Flying
Infrared night vision digital camera/camcorder
Make your own USB Rechargeable LED Headlight Torch
Posted:Jun 13, 2010
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