Title:
OPTICAL SYSTEM AND OBSERVATION DEVICE
Document Type and Number:
Japanese Patent JP2023170238
Kind Code:
A
Abstract:
To provide an optical system that can satisfactorily acquire a corneal reflection image.SOLUTION: An optical system comprises: an observation optical system that includes a half-transmissive reflective surface (HM) and a reflective polarizer (PL1), which transmits linearly polarized light in a first direction and reflects linearly polarized light orthogonal to the first direction; and an imaging optical system that forms an optical image transmitted through the reflective polarizer. A transmission axis azimuth of the reflective polarizer is non-parallel to a plane including an entrance pupil center of the imaging optical system and an optical axis of the observation optical system.SELECTED DRAWING: Figure 1
Inventors:
TASHIRO YOSHIHISA
Application Number:
JP2022081824A
Publication Date:
December 01, 2023
Filing Date:
May 18, 2022
Export Citation:
Assignee:
CANON KK
International Classes:
G02B27/02; G02B17/08; G02B25/00
Attorney, Agent or Firm:
Ryosuke Fujimoto
Atsuya Mizumoto
Tomoya Hirayama
Atsuya Mizumoto
Tomoya Hirayama
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