6650-01-056-9916 LENS,OPTICAL INSTRUMENT Index 6540-01-590-8831 PERIMETER,OPHTHALMIC

National Stock Number:
6650-01-056-9918

Federal Supply Class:
6650

National Item Identification Number:
010569918

Description:
LENS,OPTICAL INSTRUMENT

Detail:
An unmounted, transparent, color free lens which may be treated with a low reflection coating to increase light transmission. Includes single and compound elements. For items having two plane parallel surfaces, see WINDOW, OPTICAL INSTRUMENT. Excludes RETICLE, OPTICAL INSTRUMENT.


Manufacturer Information:
736123407869AIR FORCE CAMBRIDGE RESEARCH LABORATORIES L G HANSCOM FIELD


Techincal Specification:
AXIAL THICKNESS0.400 INCHES NOMINAL AND 0.300 INCHES NOMINAL
BACK FOCAL LENGTH22.901 INCHES
COMPOUND LENS STYLEDOUBLET
DIAMETER1.998 INCHES MINIMUM AND 2.000 INCHES MAXIMUM


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