115 volts; utilize spherical projection to provide direct registration of absolute target brightness of 31.5 asb and sphere luminosity of 1000 asb 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 size of 64, 16, 4, 1/4 and 1/16 sq mm with three built-in gray filters 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 50 mm laterally-in excess of 80 mm
No other part numbers with same form, fit, and function found.
An apparatus for determining the extent of the peripheral visual field on a curved surface.
Classification: Other ophthalmic instruments and appliances and parts and accessories
NSN 4140-01-172-3157
NSN 5985-01-544-8928
NSN 5990-01-004-6343
NSN 5920-01-148-5279
NSN 5920-00-305-2867
NSN 2925-01-022-3181
NSN 6685-00-915-5601
NSN 2925-01-194-2484
NSN 5905-01-099-0925
NSN 5975-01-319-3663
NSN 6620-01-352-1854
NSN 6650-00-629-8027