Title:
OPTICAL SYSTEM, DISPLAY DEVICE, AND METHOD FOR MANUFACTURING OPTICAL SYSTEM
Document Type and Number:
WIPO Patent Application WO/2024/090326
Kind Code:
A1
Abstract:
[Problem] To provide a thin optical system having high light use efficiency. [Solution] This optical system guides light from a display element (11) to an eye point (31), and comprises: a projection part (12) that projects the light from the display element; and a light guide element (20) that guides light from the projection part to the eye point, the eye point being located outside the light guide element, the projection part forming a first pupil (EP), and the light guide element being provided with a reflection part (24) that forms a second pupil (EPc) at the eye point in a first cross section parallel to a first direction, and the optical system satisfies a conditional expression of 0 ≤ A1/f < 0.5 where f (mm) is the focal length in the cross section of the reflection part, and A1(mm) is the air equivalent distance on the optical axis from a reflection surface of the reflection part to the first pupil.
Inventors:
ISHIHARA KEIICHIRO (JP)
Application Number:
PCT/JP2023/037880
Publication Date:
May 02, 2024
Filing Date:
October 19, 2023
Export Citation:
Assignee:
CANON KK (JP)
International Classes:
G02B27/02; G02B5/136
Domestic Patent References:
| WO2004097498A1 | 2004-11-11 |
Foreign References:
| US20200379254A1 | 2020-12-03 | |||
| JP2022524013A | 2022-04-27 | |||
| JP2023121413A | 2023-08-31 |
Attorney, Agent or Firm:
FUJIMOTO Ryosuke (JP)
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