Picture image observation system

Details Picture image observation system Picture image observation system

G - Physics

02

B

88/16, 88/21

G02B 21/00 (2006.01)

Patent

CA 1176877

Abstract of the Disclosure A protective lid is provided in front of an image- forming lens mounted on the forward end of a picture image transmission line which comprises plural optical fibers bundled in alignment to be remotely controlled from the back end of the transmission line for opening/closing so that the image-forming lens may be protected from particles, vapor or poisonous gas when the transmission line is used in such atmosphere, thereby preventing deterioration of the quality of picture images to be formed.

384932

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