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National Stock Number:
6650-00-393-0312
Federal Supply Class:
6650
National Item Identification Number:
003930312
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:
| 11733407 | 19200 | US ARMY ARDEC RDECOM |
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Techincal Specification:
| ELEMENT LEFT SURFACE RADIUS | 7.353 INCHES | | ELEMENT RIGHT SURFACE RADIUS | 7.353 INCHES | | ABBE CONSTANT | 56.700 AND 44.300 | | AXIAL THICKNESS | 0.685 INCHES NOMINAL AND 0.204 INCHES NOMINAL AND 0.874 INCHES NOMINAL | | COMPOUND LENS OVERALL AXIAL THICKNESS | 1.748 INCHES MINIMUM AND 1.778 INCHES MAXIMUM | | COMPOUND LENS STYLE | TRIPLET | | DIAMETER | 4.075 INCHES MINIMUM AND 4.078 INCHES MAXIMUM | | EQUIVALENT FOCAL LENGTH | 12.597 INCHES | | INDIVIDUAL LENS STYLE | DOUBLE CONVEX AND DOUBLE CONCAVE AND PLANO-CONVEX | | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-G-174, GRADE B MIL SPEC SINGLE MATERIAL RESPONSE | | MATERIAL | GLASS OPTICAL | | REFRACTION INDEX | 1.6070 NOMINAL AND 1.6130 NOMINAL |
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