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Parallelism of reticle and image |
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|  MIL-T-50760(MU)
3.6.3 Resolution. - The resolution on the optical axis shall be 15
seconds of arc or less.
3.6.4 Parallelism of reticle and image. - The vertical reticle line
shall be parallel to the image of a plumb line within 30 minutes of arc,
when each of the 3 indices (90 apart) are in position for coincidence
with a vertical plane index through the geometric axis of the telescope's
objective tube.
3.6.5 Reticle accuracy. - The angular separation for the O to 50 mil
span in each of the 4 quadrants of the reticle shall each be 50 mils
1.5 mils
3.6.6 Eyepiece focus. - The eyepiece focus of the reticle shall be
set between minus 0.75 and minus 1.0 diopter.
3.6.7 Illumination. - The telescope shall meet the "Illuminated Re-
titles" requirement of MIL-0-13830. With the reticle illuminated by In-
strument Light M53El or equivalent, the reticle markings shall appear
clearly defined when observed in a darkened area.
4. QUALIty ASSURANCE PROVISIONS
4.1 Responsibility for inspection. - Unless otherwise specified in the
contract or purchase order, the supplier is responsible for the performance
of all inspection requirements as specified herein. Except as otherwise Except as otherwise
specified, the supplier may utilize his own facilities or any other faci-
lities suitable for the performance of the inspection requirements speci-
fied herein, unless disapproved by the Government. The Government reserves
the right to perform any of the inspections set forth in the specification
where such inspections are deemed necessary to assure supplies and services
conform to prescribed requirements.
4.1.1 General provisions. - The component and subassembly inspection
requirements of MIL-F-13926 form a part of the quality assurance provisions
of this specification. of this specification. Definitions of inspection terms shall be as listed
in MIL-STD-109.
4.2 First article (initial production) approval. - The requirement
for first article approval and the responsibility (Government or con-
tractor) for first article testing shall be as specified in the contract.
The sample for first article approval tests shall consist of 3 telescopes
plus 3 each of all items covered by SQAP. The sample shall be manufactur-
ed in the same manner, using the same materials, equipment, processes, and
procedures as used in regular production. All parts and materials, includ-
ing packaging and packing, shall be obtained from the same source of supply
as used in regular production.
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