The pass/fail acceptance test separates "good" optics from "bad" under required irradiation conditions.
Test procedure:
To perform the Pass/Fail acceptance test procedure, several test sites
(minimum of 1, typically 10 (default), ideally as many as possible or raster scan) are selected
within the test area. Each site is then subjected to a fixed laser
irradiation level appropriate for the specific application. If all test
sites withstand the irradiation without sustaining damage, the sample is
certified as “passed” and deemed suitable for further use. Conversely,
if any optical element is damaged, it is classified as “failed” and does
not meet the specifications for the intended application.
Note: the procedure is fast and non-destructive for good optical
elements.
Learn more: ISO Acceptance/Certification procedure