Optical performance comparator (USH0000220)
Original Publication Date: 1987-Feb-03
Included in the Prior Art Database: 2008-Mar-23
US Statutory Invention Registration (SIRs)
Related DocumentsPatent/Patent Application:
Improved measurement of optical material degradation is provided by a comator utilizing a vidicon focused upon an illuminated white contrast target card. The optic under test is positioned between the vidicon and the target. The output of the vidicon as it scans the card is compared with the output for an undamaged optic.