Title:
WIDE-FIELD VIDEO DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/038777
Kind Code:
A1
Abstract:
This look-in-type wide-field video display device comprises an eyepiece optical system (OC), a polarizing plate, and a display element (D) positioned in the stated order from the user's-eye side. The OC includes a first lens (L1) and a second lens (L2) positioned in the stated order from the user's-eye side. The surface of the L1 on the user's-eye side is aspherical. The D-side surface of the L1 is planar or approximately planar, and a reflection polarizing plate and a 1/4-wavelength plate are laminated in the stated order thereon from the user's-eye side. The surface of the L2 on the user's-eye side is aspherical and is convex toward the eye of the user about the optical axis of the OC, or is approximately planar. The D-side surface of the L2 is convex toward the D, is aspherical, and is half-mirror coated. The relationships 0.8×P0≤P2≤1.2×P0 and |P1|<1/4×P2 hold true, where P0 and P1 are the respective powers of the OC and the L1, and P2 is the power of the L2 with respect to video light that is emitted from the D and travels along a normal optical path.
Inventors:
IBA YOICHI (JP)
Application Number:
PCT/JP2020/031665
Publication Date:
February 24, 2022
Filing Date:
August 21, 2020
Export Citation:
Assignee:
KOPIN CORP (US)
International Classes:
G02B27/02; G02B5/30; H04N5/64
Foreign References:
| JP2020519964A | 2020-07-02 | |||
| US20200053350A1 | 2020-02-13 | |||
| JP2020095205A | 2020-06-18 | |||
| JP2019053152A | 2019-04-04 |
Attorney, Agent or Firm:
AOKI, Hiroyoshi et al. (JP)
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