Patent
1983-03-21
1984-11-13
Gonzales, John
354270, G03B 940
Patent
active
044822316
ABSTRACT:
A planar light-intercepting blade adapted to be moved in the direction of surface thereof at a position across the optical path of an optical device to thereby control the quantity of light passing through the optical path comprises a pair of outer layers forming the outer surfaces of the blade, and an inner layer formed between the outer layers and having a number of spaces therein.
REFERENCES:
patent: 4276954 (1981-07-01), Romano
patent: 4298265 (1981-11-01), Tanaka et al.
patent: 4394082 (1983-07-01), Senuma et al.
patent: 4401380 (1983-08-01), Sato et al.
Ichikawa Masaru
Kato Hironobu
Nakano Yoshiyuki
Sano Atsushi
Tanabe Yoshiaki
Gonzales John
Nippon Kogaku K.K.
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