Title:
VIRTUAL IMAGE DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/042652
Kind Code:
A1
Abstract:
In the present invention, a structure generates a display image using a spatial phase modulator that diffracts laser light, wherein the impact of zero-order light is appropriately reduced. Disclosed is a virtual display device (H) comprising: a laser light source (11); a spatial phase modulator (13) that diffracts laser light; a diffractive optical element (14) provided on the diffracted light emitting surface-side of the spatial phase modulator (13); and a control unit (3) that controls the spatial phase modulator (13). The diffractive optical element (14) generates a phase difference through steps having regularity, and the control unit (3) causes the spatial phase modulator (13) to display a phase image obtained by subtracting the phase difference based on the regularity from a phase distribution corresponding to a display image.
Inventors:
NOMOTO TAKAYUKI
Application Number:
PCT/JP2022/032527
Publication Date:
March 23, 2023
Filing Date:
August 30, 2022
Export Citation:
Assignee:
NIPPON SEIKI CO LTD (JP)
International Classes:
G02B27/01; B60K35/00; B60R11/02; G03H1/22
Foreign References:
| JP2006072280A | 2006-03-16 | |||
| JP2009048681A | 2009-03-05 | |||
| JP2017518539A | 2017-07-06 | |||
| JPH01302376A | 1989-12-06 |
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