First surface mirrors by Optical Coating Labs. Inc. for some secret aerospace application. These featherweight flashers measure about 1&1/2 by 1&5/8" and is approx about 0.0025 (two and one half thousanths of an inch thick). Coated for I/R as well as visible light. They are very thin and brittle so beware when handling. Clean with isopropyl alcohol and a soft cloth. Each unit new and individually packaged. Note: These are probably protected aluminum on a silicon wafer. A mirror like this can be warped to distort a reflected image. Or to correct a distorted image by reflecting the image off a mirror distorted in the opposite direction. This called "adaptive optics" when this is done. These cute thin mirrors could be used for "voicecoil" mounting for image stabilization using PZTs, any fast pointing or slewing, and for light show applications or communications or by reflecting a laser off one that is being 'modulated' by voices in a room ...James Bond spy style.. And you could use one as a 'microphone' to modulate a I/R or visible light beam as a communications device.
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