Title:
OPTICAL SYSTEM, IMAGE PROJECTION DEVICE, AND IMAGING DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/107592
Kind Code:
A1
Abstract:
This optical system is provided with a first sub-optical system including an aperture stop, and a second sub-optical system including a prism. The prism has a first transmission surface located on the reduction side, a second transmission surface located on the enlargement side, and at least one reflection surface located between the first transmission surface and the second transmission surface. The first sub-optical system includes a plurality of rotationally symmetrical lens elements. When an axis passing through at least two centers of the rotationally symmetrical lens elements is defined as a reference optical axis, at least one optical surface of the prism is formed such that, within a plane perpendicular to the reference optical axis, a maximum angle θmax and a minimum angle θmin of an angle at which a principal ray of light rays having an image formation relationship on a concentric circle centered at an intersection point of the reference optical axis and a reduction conjugate point of a rectangular region intersects with a normal to the surface at a position at which the principal ray is incident on the optical surface satisfy the following expression. 45° > |θmax|-|θmin| > 0.014°
Inventors:
UCHIDA TSUNEO
IMAOKA TAKUYA
YAMADA KATSU
KUZUHARA SATOSHI
IMAOKA TAKUYA
YAMADA KATSU
KUZUHARA SATOSHI
Application Number:
PCT/JP2021/040442
Publication Date:
May 27, 2022
Filing Date:
November 02, 2021
Export Citation:
Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
G02B17/08; G02B13/16; G02B13/18; G03B21/00; G03B21/28
Domestic Patent References:
| WO2020240899A1 | 2020-12-03 | |||
| WO2019151252A1 | 2019-08-08 |
Foreign References:
| JP2007328232A | 2007-12-20 | |||
| JP2006154364A | 2006-06-15 | |||
| JP2006259660A | 2006-09-28 | |||
| JP2006284719A | 2006-10-19 | |||
| JP2006292814A | 2006-10-26 | |||
| JP2020020860A | 2020-02-06 | |||
| JP2020024377A | 2020-02-13 | |||
| JP2020020860A | 2020-02-06 | |||
| JP2020024377A | 2020-02-13 |
Attorney, Agent or Firm:
YAMAO, Norihito et al. (JP)
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