INCH-POUND MIL-PRF-13830B 9 January 1997 SUPERSEDING ...
INCH-POUND MIL-PRF-13830B 9 January 1997 SUPERSEDING ...
INCH-POUND MIL-PRF-13830B 9 January 1997 SUPERSEDING ...
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
<strong>MIL</strong>-<strong>PRF</strong>-<strong>13830B</strong><br />
APPENDIX C<br />
In those instances where the clear aperture is specified, areas outside the clear<br />
aperture may be coated at the discretion of the contractor.<br />
C.3.4 Coating quality. The coating shall be uniform in quality and condition and<br />
shall conform to the following:<br />
C.3.4.1 Physical. The coating shall show no evidence of deterioration such as<br />
flaking, peeling, cracking or blistering.<br />
C.3.4.2 Cosmetic. No stains, smears, streaks, or cloudiness shall be permitted<br />
on optical components lying in a focal plane beyond those permitted by the<br />
component drawing. Unless otherwise specified on the component drawing or<br />
procurement document, visual discolorations such as stains, smears, streaks,<br />
cloudiness, etc. on optical components which lie outside a focal plane in an optical<br />
system shall be acceptable when the stained area of the coated component conforms<br />
to the following as applicable:<br />
a. The transmission requirements of C.3.5.<br />
b. The reflection requirements of C.3.7.<br />
c. The adhesion requirement of C.3.8.5.<br />
d. The severe abrasion resistance requirement of C.3.8.4.1 for substrates<br />
having a Knoop hardness greater than 450 kg/mmì ; or the abrasion<br />
resistance requirement of C.3.8.4.2 for substrates having a Knoop<br />
hardness less than 450 kg/mmì .<br />
NOTE: For purposes of this specification, should a question arise as to whether an<br />
optical component lies at or outside the focal plane, it will be assumed that it lies at<br />
the focal plane.<br />
C.3.4.3 Spatter and holes. Coating spatter and holes shall be considered as a dig<br />
and shall not exceed the allowable dig size and quality stated on the component<br />
drawing or procurement document.<br />
C.3.4.4 Surface defects (scratch and dig). Coating scratches and digs shall not<br />
exceed the values specified for the substrate on the component drawing or<br />
procurement document. Coating scratches and digs shall be considered separate<br />
from the substrate scratch and dig requirements.<br />
41<br />
Source: http://www.assistdocs.com -- Downloaded: 2006-05-24T15:32Z<br />
Check the source to verify that this is the current version before use.
Change language