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Patent Searching and Data


Title:
VARIABLE-FOCAL-DISTANCE LENS SYSTEM AND IMAGING DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/078221
Kind Code:
A1
Abstract:
This variable-focal-distance lens system is constituted from, in order from an object side to an image surface side, a first lens unit constituted from a lens having a rotationally symmetrical shape, a second lens unit comprising a first free-form lens in which at least one lens surface is configured as a free-form surface, a third lens unit comprising a second free-form lens in which at least one lens surface thereof is configured as a free-form surface, and a fourth lens unit having an aperture diaphragm and being constituted from a lens having a rotationally symmetrical shape. The second lens unit and the third lens unit are movable in a Y-axis direction, and move in mutually opposite directions. The synthetic refractive power of the second lens unit and the third lens unit is variable, and the fourth lens unit moves in the optical axis direction so as to compensate for fluctuation in the image surface position that accompanies variation in the synthetic refractive power.

Inventors:
OTAKE, Motoyuki (1-7-1 Konan, Minato-k, Tokyo 75, 〒1080075, JP)
MATSUI, Takumi (1-7-1 Konan, Minato-k, Tokyo 75, 〒1080075, JP)
WEICHELT, Christin (Hedelfinger Strasse 61, Stuttgart, D-70327, DE)
KAMM, Markus (Hedelfinger Strasse 61, Stuttgart, D-70327, DE)
ISHIOKA, Manabu (1-7-1 Konan, Minato-k, Tokyo 75, 〒1080075, JP)
Application Number:
JP2018/038552
Publication Date:
April 25, 2019
Filing Date:
October 16, 2018
Export Citation:
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Assignee:
SONY CORPORATION (1-7-1, Konan Minato-k, Tokyo 75, 〒1080075, JP)
International Classes:
G02B15/14; G02B13/18
Foreign References:
JPS59116710A1984-07-05
JP2009505166A2009-02-05
JP2006047420A2006-02-16
JP2006065307A2006-03-09
JPS6479716A1989-03-24
Attorney, Agent or Firm:
TSUBASA PATENT PROFESSIONAL CORPORATION (3F Sawada Building, 15-9 Shinjuku 1-chome, Shinjuku-k, Tokyo 22, 〒1600022, JP)
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