Several years ago I sent a mirror to be recoated. The mirror came back with an inspection report. On the report was pinholes: 80/50. Can anyone tell me what this means?
Mirror Coating
Started by BillShort, 08/13/2003 08:49PM
Posted 08/13/2003 08:49PM
Opening Post
Posted 08/13/2003 10:22PM
#1
Yes, it is a Mil Spec surface quality rating. Pinholes are grouped with scratches and digs from coating or substrate. 80/50 is an acceptable cosmetic standard, but not good enough for demanding research or laser applications.
Read all the details here:
http://www.optics-online.com/tolerance.asp
Read all the details here:
http://www.optics-online.com/tolerance.asp
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