Optical mask

Details Optical mask Optical mask

G - Physics

01

B

33/62

G01B 9/08 (2006.01) G01R 13/20 (2006.01)

Patent

CA 1170035

ABSTRACT An optical mask having a portion which has the shape corresponding to the standard characteristics wave form curve for an object to be inspected as drawn on the picture screen of a Braun tube oscilloscope, the optical mask is opaque and has the optical characteristics of preventing the passage of light from such characteristic curve.

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