BHB3@psuvm.bitnet (08/31/89)
From: BHB3@psuvm.bitnet There has been a discussion going on on rec.autos for a couple of weeks on a new laser speed measuring device put out by International Measurement and Control in Littleton Colorado. The device uses speed of light and reutn time of an IR beam pulse to measure a cars distance at a few different times and determaine its velocity. I have tried to find out a much as I could about it, in the past few weeks. I know it is in the IR frequency range and that this company makes range finders for the military. I am interested in the frequency of IR it uses The info on military range finders is that they use 1.5 um (micrometers) for one handheld model. DOes anyone know what frequencies these things use and their reflection characteristics(specificly do they reflect off of or go through glass.). The infared data on glass that I have shows that ordinary car window glas absorbs anything longer than 5 um. Also does anyone know what IR frequency(or wavelength) that IR based remote controls for TV's, etc. use?