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National Stock Number:
6650-00-393-0417
Federal Supply Class:
6650
National Item Identification Number:
003930417
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:
| 11733419 | 19200 | US ARMY ARDEC RDECOM |
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Techincal Specification:
| ELEMENT LEFT SURFACE RADIUS | 1.073 INCHES | | ELEMENT RIGHT SURFACE RADIUS | 0.681 INCHES | | ABBE CONSTANT | 26.500 AND 60.300 | | BACK FOCAL LENGTH | -5.720 INCHES | | AXIAL THICKNESS | 0.099 INCHES NOMINAL AND 0.612 INCHES NOMINAL | | COMPOUND LENS OVERALL AXIAL THICKNESS | 0.701 INCHES MINIMUM AND 0.721 INCHES MAXIMUM | | COMPOUND LENS STYLE | DOUBLET | | DIAMETER | 1.791 INCHES MINIMUM AND 1.794 INCHES MAXIMUM | | EQUIVALENT FOCAL LENGTH | -3.851 INCHES | | INDIVIDUAL LENS STYLE | PLANO-CONCAVE AND PLANO-CONVEX | | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-G-174, GRADE B MIL SPEC SINGLE MATERIAL RESPONSE | | MATERIAL | GLASS OPTICAL | | REFRACTION INDEX | 1.7620 NOMINAL AND 1.6200 NOMINAL |
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