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Patent Searching and Data


Title:
LENS UNIT
Document Type and Number:
WIPO Patent Application WO/2021/044659
Kind Code:
A1
Abstract:
A lens unit provided with two or more lenses 11, 12 each having birefringence. Among the two or more lenses 11, 12 adjacent to each other, one lens 11 has a positive refractive power and another lens 12 has a negative refractive power. In the one lens 11 and the other lens 12, the vibration planes of a light wave at which a refractive index is maximized are orthogonal to each other. The two or more lenses 11, 12 are separated. The distance between the principal points of the two or more lenses 11, 12 is less than the maximum value among the absolute values of the focal lengths of the two or more lenses 11, 12.

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Inventors:
MURATA KEIJI (JP)
Application Number:
PCT/JP2020/015412
Publication Date:
March 11, 2021
Filing Date:
April 03, 2020
Export Citation:
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Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
G02B13/00
Domestic Patent References:
WO2017130111A12017-08-03
Foreign References:
JPS61233448A1986-10-17
JPH07306025A1995-11-21
JP2011005537A2011-01-13
JPS4811056B11973-04-10
Attorney, Agent or Firm:
INABA, Yoshiyuki et al. (JP)
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