Title:
IMAGING LENS FOR INFRARED RADIATION
Document Type and Number:
Japanese Patent JP2017126041
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an imaging lens for infrared radiation that is more inexpensive than the conventional one.SOLUTION: An imaging lens for infrared radiation 10 includes, in order from an object side, a first lens L1 that is formed of a silicon having a minimum transmittance of an infrared ray with a wavelength of 8 μm or more and 13 μm or less of 40% or more when having a thickness of 1 mm, a second lens L2 that is formed of chalcogenide glass, and a third lens that is formed of chalcogenide glass. The silicon having a minimum transmittance of an infrared ray with a wavelength of 8 μm or more and 13 μm or less of 40% or more when having a thickness of 1 mm can be obtained inexpensively by controlling the oxygen concentration in a CZ method.SELECTED DRAWING: Figure 1
Inventors:
SUZUKI AKIHIKO
Application Number:
JP2016006574A
Publication Date:
July 20, 2017
Filing Date:
January 15, 2016
Export Citation:
Assignee:
KYOCERA OPTEC CO LTD
International Classes:
G02B13/14; G02B13/18
Domestic Patent References:
| JP2012141522A | 2012-07-26 | |||
| JP2012037697A | 2012-02-23 | |||
| JP2017090786A | 2017-05-25 |
Foreign References:
| US20130120832A1 | 2013-05-16 |
Attorney, Agent or Firm:
Kobayashi International Patent Office
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