Inexpensive hand-held source of infrared energy is provided by a flashlight bulb coated with a paint which filters out the visible light emitted by the bulb and transmits only infrared radiation. This device can be used for checking infrared sensors and for experimental purposes.
Inexpensive infrared source improvised from flashlight
1966-03-01
Miscellaneous
No indication
English
NTRS | 2015
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