Title:
REFLECTIVE-TYPE OPTICAL SCALE FOR ENCODER, REFLECTIVE-TYPE OPTICAL ENCODER, METHOD FOR MANUFACTURING REFLECTIVE-TYPE OPTICAL SCALE FOR ENCODER, AND MULTI-SURFACE REFLECTIVE-TYPE OPTICAL SCALE MOUNT FOR ENCODER
Document Type and Number:
WIPO Patent Application WO/2024/029490
Kind Code:
A1
Abstract:
The present disclosure provides a reflective-type optical scale for an encoder, the reflective-type optical scale comprising a disk-shaped metal substrate having a first surface and a second surface facing the first surface, and a low-reflection layer disposed on the first surface side of the metal substrate, in a patterned shape in a circumferential direction of the metal substrate, wherein: the metal substrate has a reflection coefficient on at least the first surface side that is at least equal to 50%, and a thickness at least equal to 0.05 mm and at most equal to 0.60 mm; the metal substrate has a rollover at an outer circumferential edge on the first surface side thereof; and the rollover has a width of 500 μm or less.
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Inventors:
IMAI TSUYOSHI (JP)
Application Number:
PCT/JP2023/027946
Publication Date:
February 08, 2024
Filing Date:
July 31, 2023
Export Citation:
Assignee:
DAINIPPON PRINTING CO LTD (JP)
International Classes:
G01D5/347
Foreign References:
| JPS61197510U | 1986-12-10 | |||
| JPS62153710A | 1987-07-08 | |||
| JPH07311055A | 1995-11-28 | |||
| JP2020076700A | 2020-05-21 | |||
| JP2004045063A | 2004-02-12 | |||
| JP2017019884A | 2017-01-26 |
Attorney, Agent or Firm:
YAMASHITA, Akihiko et al. (JP)
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