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Patent Searching and Data


Title:
ROTARY ENCODER
Document Type and Number:
Japanese Patent JPS5979809
Kind Code:
A
Abstract:

PURPOSE: To achieve an angle detection at a high accuracy by detecting the angle of rotation of two rotary plates fixed on two separate filters from the comparison of transmissivities of both lights through the filters in which the transmissivity varies linearly in the circumferential direction while the characteristic of the transmission wavelength is different to each other.

CONSTITUTION: This rotary encoder is equipped with first and second filters 11 and 12 in which the transmissivity varies linearly in the circumferential direction while the characteristic of the transmission wavelength is different, first and second rotary plates 13 and 14 fastened thereon 11 and 12, optical fibers 15 and 15' installed on the incident side and optical fibers 16 and 16' installed on the emission side facing each other sandwiching the two rotary plates 13 and 14. A belt 18 is wound to a gear 17 provided in the center of the rotary plates 13 and 14 while the first and second rotary plates 13 and 14 rotate synchronizing with one another.


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Inventors:
Kobata, Nobuo
Sasano, Naonari
Application Number:
JP1982000190100
Publication Date:
May 09, 1984
Filing Date:
October 29, 1982
Export Citation:
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Assignee:
SHOWA ELECTRIC WIRE & CABLE CO LTD
International Classes:
G01D5/347; (IPC1-7): G01D5/30