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National Stock Number:
6650-00-789-4017
Federal Supply Class:
6650
National Item Identification Number:
007894017
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.
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Manufacturer Information:
| 8566940 | 19200 | US ARMY ARDEC RDECOM |
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Techincal Specification:
| ELEMENT LEFT SURFACE RADIUS | 1.823 INCHES | | ELEMENT RIGHT SURFACE RADIUS | 1.823 INCHES | | ABBE CONSTANT | 29.300 | | AXIAL THICKNESS | 0.118 INCHES MINIMUM AND 0.134 INCHES MAXIMUM | | BACK FOCAL LENGTH | -2.605 INCHES | | DIAMETER | 0.942 INCHES MINIMUM AND 0.945 INCHES MAXIMUM | | EQUIVALENT FOCAL LENGTH | -2.532 INCHES | | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-G-174, GRADE B, TYPE 720-293 MIL SPEC SINGLE MATERIAL RESPONSE | | MATERIAL | GLASS OPTICAL | | REFRACTION INDEX | 1.7200 NOMINAL | | SINGLE LENS STYLE | PLANO-CONCAVE | | SPECIAL FEATURES | FRONT AND BACK SURFACES COATED WITH MAGNESIUM FLUORIDE |
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