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National Stock Number:
6650-00-073-8842
Federal Supply Class:
6650
National Item Identification Number:
000738842
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:
| 8626214 | 19200 | US ARMY ARDEC RDECOM |
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Techincal Specification:
| ELEMENT LEFT SURFACE RADIUS | 1.262 INCHES | | ELEMENT RIGHT SURFACE RADIUS | 1.806 INCHES | | ABBE CONSTANT | 64.500 AND 33.800 | | AXIAL THICKNESS | 0.400 INCHES MINIMUM AND 0.420 INCHES MAXIMUM AND 0.092 INCHES MINIMUM AND 0.112 INCHES MAXIMUM | | BACK FOCAL LENGTH | 2.518 INCHES | | COMPOUND LENS OVERALL AXIAL THICKNESS | 0.492 INCHES MINIMUM AND 0.532 INCHES MAXIMUM | | COMPOUND LENS STYLE | DOUBLET | | DIAMETER | 1.097 INCHES MINIMUM AND 1.103 INCHES MAXIMUM | | EQUIVALENT FOCAL LENGTH | 2.901 INCHES | | FSC APPLICATION DATA | TELESCOPE PANORAMIC M113 | | INDIVIDUAL LENS STYLE | DOUBLE CONVEX AND PLANO-CONCAVE | | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-G-174,CLASS 1,GRADE C,TYPE 517-645 MIL SPEC 1ST MATERIAL RESPONSE AND MIL-G-174,CLASS 1,GRADE C,TYPE 649-338 MIL SPEC 2ND MATERIAL RESPONSE | | MATERIAL | GLASS OPTICAL | | REFRACTION INDEX | 1.5170 NOMINAL AND 1.6490 NOMINAL | | SPECIAL FEATURES | FRONT AND BACK SURFACES COATED WITH MAGNESIUM FLUORIDE |
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