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Title:
LENS SYSTEM, INTERCHANGEABLE LENS DEVICE, AND CAMERA SYSTEM
Document Type and Number:
WIPO Patent Application WO/2018/163831
Kind Code:
A1
Abstract:
A lens system comprises a first negative power lens element, a second lens element with a concave surface facing an object, and a third positive power lens element in order from the object toward an image surface. The lens system satisfies the following conditions (1) and (2): 0.205 < |(TL1/TA)∙tan (ω)| … (1) 0.120 < IH/TA < 0.170 … (2) Where TL1 represents the center thickness of the first lens element, TA represents an entire optical length, ω represents a half angle of view, and IH represents the image height of the lens system.

Inventors:
SHOBAYASHI HIROYUKI
MATSUMURA YOSHIO
Application Number:
PCT/JP2018/006345
Publication Date:
September 13, 2018
Filing Date:
February 22, 2018
Export Citation:
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Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
G02B13/04; G02B13/14; G02B13/18
Domestic Patent References:
WO2015159770A12015-10-22
WO2015107579A12015-07-23
Foreign References:
JP2010128100A2010-06-10
JP2011164237A2011-08-25
JP2011232418A2011-11-17
JP2012234099A2012-11-29
JP2012230434A2012-11-22
JP2013228427A2013-11-07
JP2015011050A2015-01-19
JP2017016148A2017-01-19
Attorney, Agent or Firm:
KAMATA Kenji et al. (JP)
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