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National Stock Number:
6650-00-393-0439
Federal Supply Class:
6650
National Item Identification Number:
003930439
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:
| 11733421 | 19200 | US ARMY ARDEC RDECOM |
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Techincal Specification:
| ELEMENT LEFT SURFACE RADIUS | 0.580 INCHES | | ELEMENT RIGHT SURFACE RADIUS | 1.073 INCHES | | ABBE CONSTANT | 25.800 AND 60.300 | | BACK FOCAL LENGTH | -9.461 INCHES | | AXIAL THICKNESS | 0.168 INCHES NOMINAL AND 0.366 INCHES NOMINAL | | COMPOUND LENS OVERALL AXIAL THICKNESS | 0.524 INCHES MINIMUM AND 0.544 INCHES MAXIMUM | | COMPOUND LENS STYLE | DOUBLET | | DIAMETER | 1.557 INCHES MINIMUM AND 1.560 INCHES MAXIMUM | | EQUIVALENT FOCAL LENGTH | -11.460 INCHES | | INDIVIDUAL LENS STYLE | MENISCUS AND MENISCUS CONVERGING | | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-G-174, GRADE B MIL SPEC SINGLE MATERIAL RESPONSE | | MATERIAL | GLASS OPTICAL | | REFRACTION INDEX | 1.7850 NOMINAL AND 1.6200 NOMINAL |
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