Title:
INFRARED LENS UNIT
Document Type and Number:
WIPO Patent Application WO/2017/159859
Kind Code:
A1
Abstract:
An infrared lens unit according to one embodiment of the present invention comprises a lens barrel, and a single infrared lens positioned inside this lens barrel. The infrared lens unit is further provided with a cylindrical drive member that is positioned between the lens barrel and the infrared lens, and that holds the infrared lens, directly or by means of a holding member. The linear expansion coefficient of the drive member has is different to that of the lens barrel, the object-side part of the drive member is fixed to the lens barrel, and the image side part of the outer periphery of the infrared lens or the holding member is fixed to the image-side part of the drive member.
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Inventors:
HASEGAWA MASATO (JP)
KAHARA AKINORI (JP)
YAMAGUCHI RYOTA (JP)
KAHARA AKINORI (JP)
YAMAGUCHI RYOTA (JP)
Application Number:
PCT/JP2017/010950
Publication Date:
September 21, 2017
Filing Date:
March 17, 2017
Export Citation:
Assignee:
SUMITOMO ELECTRIC INDUSTRIES (JP)
International Classes:
G02B7/02; H04N5/225
Domestic Patent References:
| WO2010061604A1 | 2010-06-03 |
Foreign References:
| JP2008304641A | 2008-12-18 | |||
| JPS58203405A | 1983-11-26 | |||
| JP2008225104A | 2008-09-25 | |||
| JP2002098878A | 2002-04-05 | |||
| JP2002014269A | 2002-01-18 |
Attorney, Agent or Firm:
AMANO Kazunori (JP)
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