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National Stock Number:
6650-00-450-1742
Federal Supply Class:
6650
National Item Identification Number:
004501742
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:
| 1073976 | 89944 | ELBITAMERICA, INC. |
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Techincal Specification:
| ABBE CONSTANT | 64.200 AND 36.000 | | BACK FOCAL LENGTH | 56.689 INCHES | | AXIAL THICKNESS | 0.158 INCHES NOMINAL AND 0.118 INCHES NOMINAL | | COMPOUND LENS OVERALL AXIAL THICKNESS | 0.276 INCHES NOMINAL | | COMPOUND LENS STYLE | DOUBLET | | DIAMETER | 0.787 INCHES NOMINAL | | EQUIVALENT FOCAL LENGTH | 57.324 INCHES | | INDIVIDUAL LENS STYLE | DOUBLE CONVEX AND PLANO-CONCAVE | | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-G-174,GRADE B,TYPE 517-642 MIL SPEC 1ST MATERIAL RESPONSE AND MIL-G-174,GRADE B,TYPE 622-360 MIL SPEC 2ND MATERIAL RESPONSE | | MATERIAL | GLASS OPTICAL | | REFRACTION INDEX | 1.5170 NOMINAL AND 1.6220 NOMINAL | | SPECIAL FEATURES | TWO PARALLEL RED LINES ON FLAT SURFACE OF LENS |
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