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National Stock Number:
1240-00-518-2960
Federal Supply Class:
1240
National Item Identification Number:
005182960
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:
| 5182960 | 19200 | US ARMY ARDEC RDECOM |
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Techincal Specification:
| ELEMENT LEFT SURFACE RADIUS | 1.355 INCHES | | ELEMENT RIGHT SURFACE RADIUS | 1.255 INCHES | | ABBE CONSTANT | 57.200 AND 33.800 | | AXIAL THICKNESS | 0.337 INCHES NOMINAL AND 0.081 INCHES NOMINAL | | BACK FOCAL LENGTH | 1.636 INCHES | | COMPOUND LENS EDGE THICKNESS | 0.250 INCHES NOMINAL | | COMPOUND LENS OVERALL AXIAL THICKNESS | 0.418 INCHES NOMINAL | | COMPOUND LENS STYLE | DOUBLET | | DIAMETER | 1.102 INCHES NOMINAL | | EQUIVALENT FOCAL LENGTH | 1.849 INCHES | | INDIVIDUAL LENS STYLE | DOUBLE CONVEX AND PLANO-CONCAVE | | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-G-174, CLASS 1, GRADE C MIL SPEC SINGLE MATERIAL RESPONSE | | MATERIAL | GLASS OPTICAL | | REFRACTION INDEX | 1.6109 NOMINAL AND 1.6479 NOMINAL |
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