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National Stock Number:
6650-00-520-4662
Federal Supply Class:
6650
National Item Identification Number:
005204662
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:
| 5204662 | 19200 | US ARMY ARDEC RDECOM |
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Techincal Specification:
| ELEMENT LEFT SURFACE RADIUS | 6.051 INCHES AND -6.086 INCHES | | ELEMENT RIGHT SURFACE RADIUS | -6.173 INCHES AND -68.563 INCHES | | ABBE CONSTANT | 64.500 AND 36.600 | | AXIAL THICKNESS | 0.358 INCHES NOMINAL AND 0.260 INCHES NOMINAL | | BACK FOCAL LENGTH | 12.597 INCHES | | COMPOUND LENS EDGE THICKNESS | 0.438 INCHES NOMINAL | | COMPOUND LENS OVERALL AXIAL THICKNESS | 0.619 INCHES NOMINAL | | COMPOUND LENS STYLE | DOUBLET | | DIAMETER | 2.047 INCHES NOMINAL | | EQUIVALENT FOCAL LENGTH | 13.004 INCHES | | FRONT FOCAL LENGTH | 12.159 INCHES | | FSC APPLICATION DATA | TELESCOPE,MODEL M49 | | INDIVIDUAL LENS STYLE | DOUBLE CONVEX AND MENISCUS DIVERGING | | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-G-174, CLASS 1, GRADE B MIL SPEC SINGLE MATERIAL RESPONSE | | MATERIAL | GLASS OPTICAL | | REFRACTION INDEX | 1.5170 NOMINAL AND 1.6170 NOMINAL |
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