Title:
EYEPIECE OPTICAL SYSTEM AND DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/180888
Kind Code:
A1
Abstract:
An eyepiece optical system (12) has an optical axis in which light is guided between a pupil of a user and a display surface, and comprises a first lens element (21) and a second lens element (22). The first lens element has a polarization reflection surface (41) that reflects or transmits incident light in accordance with the polarization of the light on a display side toward the display surface. The second lens element has a partial reflection surface (43) that reflects a portion of incident light and transmits the remainder thereof, the partial reflection surface (43) being disposed between the first lens element and the display surface. The first lens element has, on a pupil side thereof toward the pupil, an aspherical surface that is convex toward the opposite side from the polarization reflection surface and that includes a projecting region in which the optical axis is positioned. The aspherical surface of the first lens element on the pupil side thereof satisfies the condition 0.05 < SagH/BF < 0.25, where SagH is the sag of the display surface at the maximum image height, and BF is the back focus of the eyepiece optical system.
Inventors:
YAMANAKA TAKAO
MATSUMURA YOSHIO
MATSUMURA YOSHIO
Application Number:
PCT/JP2021/030418
Publication Date:
September 01, 2022
Filing Date:
August 19, 2021
Export Citation:
Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
G02B27/02; G02B5/30; G02B13/18; G02B17/08; G02B25/00; H04N5/64
Domestic Patent References:
| WO2020045517A1 | 2020-03-05 | |||
| WO2018211405A2 | 2018-11-22 | |||
| WO2017039711A1 | 2017-03-09 |
Foreign References:
| JP2001356295A | 2001-12-26 | |||
| JP2019053152A | 2019-04-04 | |||
| JP2001356295A | 2001-12-26 |
Attorney, Agent or Firm:
YAMAO, Norihito et al. (JP)
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