ENCODER, MOTOR WITH ENCODER, AND SERVO SYSTEM

摘要

An optical module includes: a light source configured to emit diffusion light to tracks; one light receiving array and another light receiving array which are arranged across the light source in a width direction substantially vertical to the measurement direction; a light receiving array arranged between the one light receiving array and the light source, and configured to receive light which is reflected at the tracks having a first incremental pattern; and a light receiving array arranged between the another first light receiving array and the light source, and configured to receive light which is reflected at the tracks having a second incremental pattern which pitch is longer than a pitch of the first incremental pattern.

主权项

1. An encoder comprising:
tracks respectively having reflectors arranged along a measurement direction; a point light source configured to emit diffusion light to the tracks; one first light receiving array and another first light receiving array which are arranged across the point light source in a width direction substantially vertical to the measurement direction; a second light receiving array arranged between the one first light receiving array and the point light source, and configured to receive light which is reflected at the tracks having a first incremental pattern; and a third light receiving array arranged between the another first light receiving array and the point light source, and configured to receive light which is reflected at the tracks having a second incremental pattern which pitch is longer than a pitch of the first incremental pattern.