Patent ID: 11902675
Assignee: KOREA ELECTROTECHNOLOGY RESEARCH INSTITUTE
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  A  G | IPC A  G  H

Claim 6:
7. An optical filtering apparatus for generating a multi-wavelength image of a subject, the optical filtering apparatus comprising:
a filter unit configured to have a plurality of sub-filter units including a first sub-filter unit through which a first wavelength band passes and a second sub-filter unit through which a second wavelength band, which is different from the first wavelength band, passes,
a driving unit configured to drive the filter unit, and
wherein, while light generated in a light source passes through the filter unit, the filter unit filters the light such that an intensity of the first wavelength band is dominant in a first region and an intensity of the second wavelength band is dominant in a second region,
wherein the driving unit drives the filter unit such that the intensity of the first wavelength band is dominant in the first region at a first time point, the intensity of the second wavelength band is dominant in the first region at a second time point, and an nth wavelength band corresponding to the plurality of sub-filter units is sequentially dominant in the first region at a subsequent nth time point, and
wherein
the first sub-filter unit includes a 1-1-th sub-filter piece and a 1-2-th sub-filter piece,
the second sub-filter unit includes a 2-1-th sub-filter piece and a 2-2 sub-filter piece, and
the 1-1-th sub-filter piece and the 1-2-th sub-filter piece are positioned to cross each other with the 2-1-th sub-filter piece and the 2-2-th sub-filter piece.