18887381. OPTICAL SYSTEM AND IMAGE DISPLAY DEVICE (Panasonic Intellectual Property Management Co., Ltd.)
OPTICAL SYSTEM AND IMAGE DISPLAY DEVICE
Organization Name
Panasonic Intellectual Property Management Co., Ltd.
Inventor(s)
Satoshi Kuzuhara of Osaka (JP)
OPTICAL SYSTEM AND IMAGE DISPLAY DEVICE
This abstract first appeared for US patent application 18887381 titled 'OPTICAL SYSTEM AND IMAGE DISPLAY DEVICE
Original Abstract Submitted
The optical system includes: a light guide for guiding an image light ray to a field of view region of a user as a virtual image. The light guide includes a diffraction structure region constituting a surface-relief diffraction grating dividing the image light ray propagating in a first propagation direction intersecting a thickness direction of a body into a plurality of image light rays propagating in a second propagation direction intersecting the first propagation direction, in the first propagation direction. The diffraction structure region includes a first diffraction structure, and a second diffraction structure on an opposite side of the first diffraction structure from an in-coupling region in the first propagation direction. A grating height of the first diffraction structure is greater than a grating height of the second diffraction structure. A grating width of the first diffraction structure is greater than a grating width of the second diffraction structure.
