Title:
OBSERVATION OPTICAL SYSTEM AND DISPLAY DEVICE
Document Type and Number:
Japanese Patent JP2023127121
Kind Code:
A
Abstract:
To improve transmittance with respect to polarized light transmitting a metal wire microstructure without relying upon an incidence angle in an observation optical system performing an optical path return, using the metal wire microstructure.SOLUTION: An observation optical system has: a lens GP that has a first half-transmission reflection surface R1; and a second half-transmission reflection surface R2 that is disposed on a display element side further than the first half-transmission reflection surface. The observation optical system is configured to guide light from a display element ID to an observation side via transmission of the second half-transmission reflection surface, reflection upon the first half-transmission reflection surface, reflection upon the second half-transmission reflection surface and transmission of the first half-transmission reflection surface. The first half-transmission reflection surface has a polarized light selectivity half-transmission reflection function by a metal wire microstructure, in which a pitch of the metal wire microstructure varies according to a height from an optical axis of the lens.SELECTED DRAWING: Figure 1
Inventors:
SAKAI YOSUKE
Application Number:
JP2022030701A
Publication Date:
September 13, 2023
Filing Date:
March 01, 2022
Export Citation:
Assignee:
CANON KK
International Classes:
G02B25/00; G02B5/30; G02B13/18; G02B17/08
Attorney, Agent or Firm:
Ryosuke Fujimoto
Atsuya Mizumoto
Tomoya Hirayama
Atsuya Mizumoto
Tomoya Hirayama