Patent ID: 11930256
Assignee: FUJIFILM CORPORATION
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 22:
23. An imaging method comprising:
a step of preparing an imaging optical system which has a first pupil region for passing light in a first wavelength range and a second pupil region for passing light in a second wavelength range different from the first wavelength range, in which an axial chromatic aberration of the imaging optical system due to a difference between the first wavelength range and the second wavelength range is reduced based on a relationship between an aberration other than the axial chromatic aberration of the imaging optical system and positions of the first pupil region and the second pupil region in the imaging optical system,
wherein the imaging optical system has a front lens group disposed on an object side with respect to a stop, and a rear lens group disposed on an image side with respect to the stop,
the first pupil region and the second pupil region are located between the front lens group and the rear lens group, and
the front lens group has an angular magnification which makes an angle of off-axis principal ray incident on the first pupil region and the second pupil region close to perpendicular to a stop plane;
a step of dividing each of the light passing through the first pupil region in the imaging optical system and the light passing through the second pupil region in the imaging optical system into pupils to be incident on a first pixel and a second pixel included in an imaging element; and
a step of processing, by a signal processing unit, a signal output from the imaging element, and generating each of a first image of the first wavelength range and a second image of the second wavelength range based on an output signal of the first pixel and an output signal of the second pixel.