8566978

Diopter scale

8566978 Description

1.750 inches inside diameter, 0.354 inches overall height, 7 scale division quantity, 2.370 inches overall outside diameter, 3 setscrews mounting configuration.

Properties of 8566978

Inside Diameter:
Between 1.750 inches and 1.755 inches
Overall Height:
Between 0.354 inches and 0.364 inches
Scale Division Quantity:
7
Overall Outside Diameter:
Between 2.370 inches and 2.375 inches
Inscription Color:
Black
Mounting Configuration:
3 setscrews
Scale Unit Of Measure Inscription:
3, 2, 1, minus sign/in symbol fo rm/, 0, plus sign/in symbol form/, 1, 2, 3
Material:
Aluminum alloy, qq-a-200/3, alloy 2024, t4
Material:
Aluminum alloy 2024
Material Specification:
Qq-a-200/3, alloy 2024, t4 federal specification single material response
Surface Treatment:
Anodize
Surface Treatment:
Anodized
Fsc Application Data:
Periscope, m32, m35, and m36, integrated with fire control equipment
NSN:
1240-00-973-1411
Description:
Scale,diopter
Cage Code:

Definition Diopter Scale

A graduated scale, usually cylindrical in shape, attached to, or forming a part of, the focusing nut or knob of the eyepiece of an optical instrument. It is read in conjunction with a line or dart indicator to measure the change in refracting power of the eyepiece, in diopters, and introduces correction to compensate for the eyesight variation of the observer. It may have a knurled periphery and/or teeth on the inside diameter.

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Last modified 03/28/2024