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National Stock Number:
6650-00-532-1551
Federal Supply Class:
6650
National Item Identification Number:
005321551
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:
| 5321551 | 19200 | US ARMY ARDEC RDECOM |
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Techincal Specification:
| ELEMENT LEFT SURFACE RADIUS | -3.150 INCHES AND 4.911 INCHES | | ELEMENT RIGHT SURFACE RADIUS | -1.418 INCHES | | ABBE CONSTANT | 56.100 AND 29.300 | | AXIAL THICKNESS | 0.886 INCHES NOMINAL AND 0.157 INCHES NOMINAL | | BACK FOCAL LENGTH | 2.753 INCHES | | COMPOUND LENS EDGE THICKNESS | 0.729 INCHES NOMINAL | | COMPOUND LENS OVERALL AXIAL THICKNESS | 1.043 INCHES NOMINAL | | COMPOUND LENS STYLE | DOUBLET | | DIAMETER | 2.283 INCHES NOMINAL | | EQUIVALENT FOCAL LENGTH | 2.998 INCHES | | FRONT FOCAL LENGTH | 1.710 INCHES | | FSC APPLICATION DATA | TELESCOPE,M69G,INTEGRATED WITH FIRE CONTROL EQUIP | | INDIVIDUAL LENS STYLE | DOUBLE CONVEX AND MENISCUS DIVERGING | | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-G-174, CLASS 1, GRADE C MIL SPEC SINGLE MATERIAL RESPONSE | | MATERIAL | GLASS OPTICAL | | REFRACTION INDEX | 1.6970 NOMINAL AND 1.7200 NOMINAL |
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