Polaroid 9107 and 9049 Laser Diodes
infrared (IR) laser light sources used to emit a narrow, coherent beam of invisible infrared light for distance measurement, sensing, and alignment.
9049 vs 9107 — functionally
There is no functional difference in purpose between the two:
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Both are IR laser emitters
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Both are used as active light sources
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Any difference is in wavelength, output power, or efficiency, not role
SN 6979 and 2767





