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National Stock Number:
1240-00-622-4990
Federal Supply Class:
1240
National Item Identification Number:
006224990
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:
| 8289293 | 19200 | US ARMY ARDEC RDECOM |
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Techincal Specification:
| ELEMENT LEFT SURFACE RADIUS | 3.668 INCHES | | ELEMENT RIGHT SURFACE RADIUS | 3.668 INCHES | | ABBE CONSTANT | 60.500 AND 36.200 | | AXIAL THICKNESS | 0.280 INCHES NOMINAL AND 0.118 INCHES NOMINAL | | BACK FOCAL LENGTH | 8.608 INCHES | | COMPOUND LENS OVERALL AXIAL THICKNESS | 0.398 INCHES NOMINAL | | COMPOUND LENS STYLE | DOUBLET | | DIAMETER | 1.696 INCHES MINIMUM AND 1.699 INCHES MAXIMUM | | EQUIVALENT FOCAL LENGTH | 8.819 INCHES | | FRONT FOCAL LENGTH | 8.210 INCHES | | INDIVIDUAL LENS STYLE | DOUBLE CONVEX AND PLANO-CONCAVE | | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-G-174, CLASS 1, GRADE C, FORM PLATES MIL SPEC SINGLE MATERIAL RESPONSE | | MATERIAL | GLASS OPTICAL | | REFRACTION INDEX | 1.5125 NOMINAL AND 1.6210 NOMINAL |
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