Title:
VARIABLE FOCAL LENGTH LENS DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/223371
Kind Code:
A1
Abstract:
A variable focal length lens device (201A) comprises: a first variable focal length lens (11); a second variable focal length lens (21) disposed behind the first variable focal length lens (11); a third variable focal length lens (31) disposed behind the second variable focal length lens (21); a fixed focal length lens (41) disposed behind the third variable focal length lens (31); a first conjugate point (1) separated forward from the first variable focal length lens (11) by a first focal length (f1); a second conjugate point (2) separated rearward from the fixed focal length lens (41) by a fourth focal length (f4); and a third conjugate point (3) separated rearward from the second variable focal length lens (21) by a second focal length (f2) and separated forward from the third variable focal length lens (31) by a third focal length (f3). A first partial optical system (111) is an infinite conjugate system with respect to the first conjugate point (1), and a second partial optical system (121) is an infinite conjugate system with respect to the third conjugate point (3).
Inventors:
SAKAI KOHEI (JP)
Application Number:
PCT/JP2022/020311
Publication Date:
November 23, 2023
Filing Date:
May 16, 2022
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
G02B13/00; G02B3/14; G02F1/19
Domestic Patent References:
| WO2018134730A1 | 2018-07-26 |
Foreign References:
| JP2016053491A | 2016-04-14 | |||
| JP2004219397A | 2004-08-05 | |||
| JP2014139671A | 2014-07-31 | |||
| JP2013141192A | 2013-07-18 | |||
| JP2010276716A | 2010-12-09 |
Attorney, Agent or Firm:
SANNO PATENT ATTORNEYS OFFICE (JP)
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