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

Claim 8:
9. An optical filter method for generating a multi-wavelength image of a subject, the method comprising:
driving a filter unit using a driving unit;
filtering light generated from a light source using the 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; and
generating the multi-wavelength image of the subject using the light filtered by the filter unit,
wherein, in the filtering, the filter unit filters and transmits 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.