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Patent Searching and Data


Title:
OPTICAL SYSTEM, AND IMAGING DEVICE AND IMAGING SYSTEM EQUIPPED WITH OPTICAL SYSTEM
Document Type and Number:
WIPO Patent Application WO/2019/235371
Kind Code:
A9
Abstract:
The optical system 10 comprises a front group 11, a light shielding part 4, and a rear group 12 in order from the object side to the image side. The light shielding part 4 has an opening extending lengthwise in a first direction. The front group 11 does not form an image of the object on the opening along a first cross-section parallel to the first direction but forms an intermediate image of the object on the opening along a second cross-section perpendicular to the first direction. The rear group 12 has a diffraction surface 5 that divides the light flux passing through the opening along the second cross-section into a plurality of light fluxes with mutually different wavelengths. The rear group 12 focuses the plurality of light fluxes to mutually different positions along the second cross-section. The F-number on the image side along the first cross-section and the F-number on the image side along the second cross-section are different from each other.

Inventors:
KANO HIROTO (JP)
KIMURA KAZUMI (JP)
YOSHIDA HIROKI (JP)
KUDO GENICHIRO (JP)
Application Number:
PCT/JP2019/021650
Publication Date:
January 21, 2021
Filing Date:
May 31, 2019
Export Citation:
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Assignee:
CANON KK (JP)
International Classes:
G02B17/00; G01N21/47; G01N21/88; G02B3/02; G02B5/18; G02B13/08; G02B27/42; H04N5/225
Attorney, Agent or Firm:
ABE Takuma et al. (JP)
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