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RE: Inspection box for optics
This company specializes in precision optics and precision measurement. They make measurement and calibration devices including light boxes. http://www.maxlevy.com I would guess they can help you.
http://www.netgages.com
RE: Inspection box for optics
Do you have a copy of MIL-C-675C? Section 4.5.3.1 describes the basic requirements for the visual inspection lightbox. Here is an excerpt.
"4.5.3.1 Physical. – The film coating on the component shall be visually examined by reflection, with the unaided eye, for evidence of flaking, peeling, cracking or blistering. The examination shall be performed using two 15 watt cool white fluorescent light tubes as the light source. The viewing distance from the coated surface to the eye shall not exceed 18 inches (45.7 CM). The coated surface shall be viewed against a black matte background. The only illumination in the inspection are shall be from the light source used for examination. This method of examination is as depicted in Figure 3. The coating shall conform to the requirements of 3.4.1."
I used to have a bookmarked location to the site where you could download the standard from the government site (apparently no longer since many standards have become obsolete though 675c was re-activated). You might be able to find it directly through a search.
Regards,