Title:
OPTICAL FILTER DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/102548
Kind Code:
A1
Abstract:
An optical filter device (10) is provided with: a first multicore optical fiber (20) that is provided with a plurality of first cores; a first lens (30); an optical filter (40) that is rotated by a predetermined rotation angle around a rotation axis with respect to a plane orthogonal to an optical axis and transmits emitted light from the first lens (30); a second lens (50); and an optical fiber (60) that has a core on which emitted light from the second lens (50) is incident. When directions from a reference axis passing an optical axis and parallel to a rotation axis toward one side and the other side with respect to the reference axis along an orthogonal axis orthogonal to the optical axis and the reference axis are defined as a first orthogonal direction and a second orthogonal direction, respectively, the orientation in the circumferential direction of the first multicore optical fiber is set such that, when the end face thereof is viewed along the central axis line thereof, a separation distance that is the sum of distances of first cores most separated in the first orthogonal direction and the second orthogonal direction, respectively, from the reference axis becomes minimum.
Inventors:
KITO KATSUYA (JP)
IWASAKI KATSUHIRO (JP)
KIRIYAMA TOMOAKI (JP)
IWASAKI KATSUHIRO (JP)
KIRIYAMA TOMOAKI (JP)
Application Number:
PCT/JP2021/040855
Publication Date:
May 19, 2022
Filing Date:
November 05, 2021
Export Citation:
Assignee:
KOHOKU KOGYO KK (JP)
International Classes:
G02B6/02; G02B6/26
Foreign References:
| JP5598882B2 | 2014-10-01 | |||
| JPH0572411A | 1993-03-26 | |||
| JP2004264739A | 2004-09-24 | |||
| JP2001264572A | 2001-09-26 | |||
| US20030174937A1 | 2003-09-18 | |||
| JPH06130244A | 1994-05-13 |
Other References:
MITSUNOBU KOBIYAMA: "Optical Thin-Film Filter Design", 2006, THE OPTRONICS CO. LTD., pages: 301 - 346
Attorney, Agent or Firm:
PROSPEC PATENT FIRM (JP)
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