Title:
DISPLACEMENT DETECTOR
Document Type and Number:
Japanese Patent JP2022027890
Kind Code:
A
Abstract:
To provide a displacement amount detector capable of detecting a displacement amount stably and highly accurately.SOLUTION: As a polarization holding fiber for transmitting light from a light source to a displacement detector, a length not becoming the same as a length determined by dividing a product between an even-numbered time of a length obtained by multiplying a double length of a resonator by a refractive index of the resonator and a beat length determined from a difference of a propagation constant between two polarization modes, by a wavelength of the light source, is selected from in the range containing the same length.SELECTED DRAWING: Figure 1
More Like This:
| JP7058935 | Photoelectric encoder |
| JP4520121 | Optical encoder |
Inventors:
SUZUKI AKINORI
SHINTANI MASAYUKI
MATSUSHITA KENJI
NISHIDA TERUKAZU
TAMIYA HIDEAKI
TANIGUCHI KAYOKO
SHINTANI MASAYUKI
MATSUSHITA KENJI
NISHIDA TERUKAZU
TAMIYA HIDEAKI
TANIGUCHI KAYOKO
Application Number:
JP2021202420A
Publication Date:
February 14, 2022
Filing Date:
December 14, 2021
Export Citation:
Assignee:
DMG MORI SEIKI CO LTD
International Classes:
G01D5/347; G01B11/00
Domestic Patent References:
| JP2006194855A | 2006-07-27 | |||
| JP2005283358A | 2005-10-13 | |||
| JP2014092663A | 2014-05-19 |
Foreign References:
| WO2003034557A1 | 2003-04-24 |
Attorney, Agent or Firm:
Shinto International Patent Office