Title:
OPTICAL DEVICE
Document Type and Number:
Japanese Patent JP2021021933
Kind Code:
A
Abstract:
To provide an optical device which is advantageous in terms of reduced size and cost.SOLUTION: An optical device for wavelength dispersion of light is provided, comprising: a dispersion element configured to transmit and disperse incident light such that a light path is different for each wavelength so as to generate first dispersed light; and a reflective unit comprising four reflective surfaces for sequentially reflecting the first dispersed light. The first dispersed light sequentially reflected by the four reflective surfaces is fed to the dispersion element to transmit therethrough.SELECTED DRAWING: Figure 1
Inventors:
OTA TAKEFUMI
Application Number:
JP2020082546A
Publication Date:
February 18, 2021
Filing Date:
May 08, 2020
Export Citation:
Assignee:
CANON KK
International Classes:
G02B26/00; B23K26/00; B23K26/0622; B23K26/064; H01S3/00; H01S3/10
Attorney, Agent or Firm:
Ryoichi Takaoka
Nao Oda
Rena Miyoshi
Nao Oda
Rena Miyoshi