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National Stock Number:
1240-00-116-3432
Federal Supply Class:
1240
National Item Identification Number:
001163432
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:
| 10514276 | 19200 | US ARMY ARDEC RDECOM |
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Techincal Specification:
| ABBE CONSTANT | 33.800 AND 59.900 | | AXIAL THICKNESS | 0.101 INCHES MINIMUM AND 0.113 INCHES MAXIMUM AND 0.494 INCHES MINIMUM AND 0.506 INCHES MAXIMUM | | BACK FOCAL LENGTH | 1.934 INCHES | | COMPOUND LENS OVERALL AXIAL THICKNESS | 0.595 INCHES MINIMUM AND 0.619 INCHES MAXIMUM | | COMPOUND LENS STYLE | DOUBLET | | DIAMETER | 1.236 INCHES MINIMUM AND 1.240 INCHES MAXIMUM | | ELEMENT LEFT SURFACE RADIUS | 2.270 INCHES | | ELEMENT RIGHT SURFACE RADIUS | 0.828 INCHES | | EQUIVALENT FOCAL LENGTH | 2.079 INCHES | | FSC APPLICATION DATA | PERISCOPE | | INDIVIDUAL LENS STYLE | MENISCUS DIVERGING AND DOUBLE CONVEX | | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-G-174,CLASS 1,GRADE C,TYPE 649-338 MIL SPEC 1ST MATERIAL RESPONSE AND MIL-G-174,CLASS 1,GRADE C,TYPE541-599 MIL SPEC 2ND MATERIAL RESPONSE | | MATERIAL | GLASS OPTICAL | | REFRACTION INDEX | 1.6490 NOMINAL AND 1.5410 NOMINAL | | SPECIAL FEATURES | FRONT AND BACK SURFACES COATED WITH MAGNESIUM FLUORIDE |
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