Title:
LENS UNIT AND LAYERED FILM
Document Type and Number:
WIPO Patent Application WO/2023/176655
Kind Code:
A1
Abstract:
Provided is a lens unit with which a decrease in the weight and an improvement in the visibility of VR goggles can be realized. A lens unit according to an embodiment of the present invention is used in a display system for displaying an image to a user, the lens unit comprising: a reflective polarization member that reflects light which has been emitted toward the front from a display surface of a display element showing an image and which has passed through a polarization member and a first λ/4 member; a first lens unit that is disposed on an optical path between the display element and the reflective polarization member; a half mirror that is disposed between the display element and the first lens unit, and that transmits light emitted from the display element and reflects light which has been reflected by the reflective polarization member back toward the reflective polarization member; a second lens unit that is disposed in front of the reflective polarization member; a second λ/4 member that is disposed on an optical path between the half mirror and the reflective polarization member; and a protective member that is disposed on an optical path between the half mirror and the second lens unit. The protective member contacts a space formed between the protective member and at least one of the first lens unit and the second lens unit. The maximum value of a 5° regular reflectance spectrum in the wavelength range of 420 nm to 680 nm of the protective member is 1.2% or less.
Inventors:
KOJIMA TADASHI (JP)
GOTO SHUSAKU (JP)
GOTO SHUSAKU (JP)
Application Number:
PCT/JP2023/008962
Publication Date:
September 21, 2023
Filing Date:
March 09, 2023
Export Citation:
Assignee:
NITTO DENKO CORP (JP)
International Classes:
G02B27/02; G02B3/00; G02B5/00; G02B5/08; G02B5/30; G02B13/00; G02B17/08; G02C7/00; G02F1/13; G02F1/1335; G02F1/13363; G02F1/1337; G09F9/00; H04N5/64; H04N5/66; H04N13/344; H04N13/346; H05B33/02; H05B33/10; H05B33/24; H10K50/00; H10K50/858; H10K50/86; H10K59/00; H10K59/10
Domestic Patent References:
| WO2021193416A1 | 2021-09-30 | |||
| WO2021145446A1 | 2021-07-22 |
Foreign References:
| JP2019526075A | 2019-09-12 | |||
| JP2005134713A | 2005-05-26 | |||
| US20210033865A1 | 2021-02-04 | |||
| JP2019053152A | 2019-04-04 | |||
| JP2015055746A | 2015-03-23 |
Attorney, Agent or Firm:
MOMII Takafumi (JP)
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