Photoelectric encoder
First Claim
Patent Images
1. A photoelectric encoder comprising:
- a light source;
a scale including a first optical grating for receiving irradiation of light from said light source; and
a light-receiving unit including light-receiving elements each having a hexagonal light acceptance surface for permitting incidence of an optical signal as generated based on the light falling onto said first optical grating, said light-receiving unit being relatively movably disposed with a gap provided between itself and said scale for detecting a plurality of phase-different optical signals by said light-receiving elements as two-dimensionally disposed on a plane opposing said first optical grating.
1 Assignment
0 Petitions
Accused Products
Abstract
A photoelectric encoder includes an optical receipt chip on which the light acceptance surfaces of a plurality of photodiodes are disposed two-dimensionally. Four optical signals different in phase from one another (i.e., light signals with phase “A,” phase “B,” phase “AA,” and phase “BB”) are guided to fall onto the light acceptance surfaces. The shape of each light acceptance surface is a regular hexagon.
-
Citations
4 Claims
-
1. A photoelectric encoder comprising:
-
a light source;
a scale including a first optical grating for receiving irradiation of light from said light source; and
a light-receiving unit including light-receiving elements each having a hexagonal light acceptance surface for permitting incidence of an optical signal as generated based on the light falling onto said first optical grating, said light-receiving unit being relatively movably disposed with a gap provided between itself and said scale for detecting a plurality of phase-different optical signals by said light-receiving elements as two-dimensionally disposed on a plane opposing said first optical grating. - View Dependent Claims (2, 3, 4)
-
Specification