Document Type and Number:
Japanese Patent JPS5175442
Kind Code:
A
Inventors:
IBUSAWA TSUKUMO
Application Number:
JP14820474A
Publication Date:
June 30, 1976
Filing Date:
December 25, 1974
Export Citation:
Assignee:
ASAHI OPTICAL CO LTD
International Classes:
G03B7/28; G01J1/44; (IPC1-7): G01J1/44; G03B7/00