Title:
TRANSMITTIVITY CONTINUOUS VARIABLE FILTER
Document Type and Number:
Japanese Patent JPS5754903
Kind Code:
A
Abstract:
PURPOSE: To obtain a filter which is stable and capable of continuously varying the transmittivity extending over a wide range, by inserting two transparent plates into the optical path so as to be a surface symmetry, and varying an angle to the optical axis.
CONSTITUTION: Worm wheels 9a, 9b are installed to glass plates 3a, 3b, and the angle is varied by a worm gear 10 so as to be a surface symmetry against an optical axis 11. In this way, it is possible to obtain a filter which is stable and capable of continuously varying the transmittivity extending over a wide range.
Inventors:
HONGOU MIKIO
MIYAUCHI TAKESHI
MIZUKOSHI KATSUROU
YAMAGUCHI HIROSHI
MIYAUCHI TAKESHI
MIZUKOSHI KATSUROU
YAMAGUCHI HIROSHI
Application Number:
JP12931280A
Publication Date:
April 01, 1982
Filing Date:
September 19, 1980
Export Citation:
Assignee:
HITACHI LTD
International Classes:
G02B26/02; G02B7/00; (IPC1-7): G02B5/00