Title:
OPTICAL SYSTEM, AND IMAGING DEVICE AND IMAGING SYSTEM EQUIPPED WITH SAME
Document Type and Number:
WIPO Patent Application WO/2019/235372
Kind Code:
A1
Abstract:
An optical system 10 comprising a front group 11, a light-shielding member 4 and a rear group 12 which are positioned in this order from the object side to the image side, wherein: the light-shielding member 4 is provided with an opening which is long in a first direction; the front group 11 forms an intermediate image of an object in the opening in a second cross-section perpendicular to the first direction, without forming an image of the object in the opening in a first cross-section parallel to the first direction; the rear group 12 has a diffractive surface 5 for diffracting beams of light which have passed through the opening into a plurality of beams of light which have different wavelengths from one another in the second cross-section, and focuses the plurality of beams of light at different locations in the second cross-section; and the beams of light which are emitted by the front group 11 and are incident on the opening are not parallel in the first cross-section.
Inventors:
YOSHIDA HIROKI (JP)
KIMURA KAZUMI (JP)
KUDO GENICHIRO (JP)
KANO HIROTO (JP)
KIMURA KAZUMI (JP)
KUDO GENICHIRO (JP)
KANO HIROTO (JP)
Application Number:
PCT/JP2019/021656
Publication Date:
December 12, 2019
Filing Date:
May 31, 2019
Export Citation:
Assignee:
CANON KK (JP)
International Classes:
G02B17/00; G01N21/47; G01N21/88; G02B3/02; G02B5/18; G02B13/08; G02B27/42; H04N5/225
Foreign References:
| US20060082772A1 | 2006-04-20 | |||
| US20180066987A1 | 2018-03-08 | |||
| US6046808A | 2000-04-04 |
Attorney, Agent or Firm:
ABE Takuma et al. (JP)
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