The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 18, 2024
Filed:
Jan. 15, 2021
Applicant:
Canon Kabushiki Kaisha, Tokyo, JP;
Inventors:
Masakazu Tohara, Tokyo, JP;
Ryoji Kondo, Kanagawa, JP;
Assignee:
CANON KABUSHIKI KAISHA, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 27/01 (2006.01); G02B 5/30 (2006.01); G02B 13/18 (2006.01); G02B 25/00 (2006.01); G02B 27/00 (2006.01); G02B 27/28 (2006.01);
U.S. Cl.
CPC ...
G02B 27/0172 (2013.01); G02B 5/3083 (2013.01); G02B 13/18 (2013.01); G02B 25/001 (2013.01); G02B 27/0018 (2013.01); G02B 27/283 (2013.01); G02B 2027/012 (2013.01); G02B 2027/0132 (2013.01);
Abstract
The optical system introduces light from a display element displaying an image to an observer. The optical system includes in order from the display element toward the observer, a first phase plate, a semi-transmissive reflective surface, a lens, a second phase plate, and a polarization beam splitter configured to reflect a first linearly polarized light and transmit a second linearly polarized light whose polarization direction is orthogonal to that of the first linearly polarized light. The semi-transmissive reflective surface has a transmittance smaller than a reflectance thereof.