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National Stock Number:
6650-00-520-4757
Federal Supply Class:
6650
National Item Identification Number:
005204757
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:
| 5204757 | 19207 | U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM |
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Techincal Specification:
| ELEMENT LEFT SURFACE RADIUS | -0.629 INCHES AND 0.473 INCHES | | ELEMENT RIGHT SURFACE RADIUS | -0.473 INCHES AND 3.351 INCHES | | ABBE CONSTANT | 36.600 AND 59.900 | | AXIAL THICKNESS | 0.335 INCHES NOMINAL AND 0.430 INCHES NOMINAL | | BACK FOCAL LENGTH | 0.905 INCHES | | COMPOUND LENS EDGE THICKNESS | 0.211 INCHES NOMINAL | | COMPOUND LENS OVERALL AXIAL THICKNESS | 0.394 INCHES NOMINAL | | COMPOUND LENS STYLE | DOUBLET | | DIAMETER | 0.689 INCHES NOMINAL | | EQUIVALENT FOCAL LENGTH | 1.141 INCHES | | INDIVIDUAL LENS STYLE | DOUBLE CONVEX AND MENISCUS DIVERGING | | MATERIAL DOCUMENT AND CLASSIFICATION | JAN-G-174, GRADE C MIL SPEC SINGLE MATERIAL RESPONSE | | MATERIAL | GLASS OPTICAL | | REFRACTION INDEX | 1.5411 NOMINAL AND 1.6170 NOMINAL |
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