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National Stock Number:
6540-01-182-3921
Federal Supply Class:
6540
National Item Identification Number:
011823921
Description:
PERIMETER,OPHTHALMIC
Detail:
AN APPARATUS FOR DETERMINING THE EXTENT OF THE PERIPHERAL VISUAL FIELD ON A CURVED SURFACE.
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Manufacturer Information:
| 4-316-P | 64616 | DEFENSE MEDICAL STANDARDIZATION BOARD |
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Techincal Specification:
| CURRENT TYPE | AC | | DESIGN DESIGNATION | GOLDMAN | | PART NAME ASSIGNED BY CONTROLLING AGENCY | PERIMETER OPHTHALMIC: | | SPECIAL FEATURES | 120/230 VOLTS 50/60 HZ; UTILIZES SPHERICAL PROJECTION TO PROVIDE DIRECT REGISTRATION OF ABSOLUTE TARGET BRIGHTNESS OF 31.5 ASB MAXIMUM AND SPHERE LUMINOSITY OF 1000 ASB MAXIMUM ON A 30 CM RADIUS PROJECTION HEMISPHERE SURFACE; SPRING-BALANCED,CENTER POSTED TABLE,WITH PRECISE BALANCE FOR INSTRUMENT WEIGHT; CONTAINS A TELESCOPE WITH MAGNIFICATION NOT LESS THAN 1.85X; ADJUSTABLE TARGET SIZES OF 64,16,4,1/4 AND 1/16 SQ MM WITH MINIMUM THREE BUILT-IN GRAY FLILTERS HAVING RELATIVE LIGHT INTENSITY LEVELS RANGED FROM 0.0315 TO 1.00; THREE FILTER CAPS ATTACHMENT WITH RED,GREEN AND BLUE COLOR EACH; CHIN ADJUSTMENT RANGE: VERTICALLY-IN EXCESS OF 80 MM |
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