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公开(公告)号：US20210080402A1
公开(公告)日：2021-03-18
申请号：US17108864
申请日：2020-12-01
Applicant: CANON KABUSHIKI KAISHA
Inventor： Hiroto Kano , Kazumi Kimura , Hiroki Yoshida , Genichiro Kudo
Abstract: Optical system includes front group, light-shielding member, and rear group that are arranged in direction from object side toward image side. The light-shielding member is provided with opening elongated in first direction. The front group does not image the object at the opening in first section parallel to the first direction and forms intermediate image of the object at the opening in second section perpendicular to the first direction. The rear group has diffractive surface that splits light beam that passes through the opening into light beams at different wavelengths in the second section and focuses the light beams on different locations in the second section. F-number for the side of the image in the first section differs from an F-number for the side of the image in the second section.
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公开(公告)号：US20210080401A1
公开(公告)日：2021-03-18
申请号：US17108561
申请日：2020-12-01
Applicant: CANON KABUSHIKI KAISHA
Inventor： Genichiro Kudo , Kazumi Kimura , Hiroki Yoshida , Hiroto Kano
Abstract: Optical system includes front group, light-shielding member, and rear group that are arranged in this order in direction from object side toward image side. The light-shielding member is provided with opening elongated in first direction. The front group has aspherical surfaces, does not image the object at the opening in first section parallel to the first direction, and forms intermediate image of the object at the opening in second section perpendicular to the first direction. The rear group has diffractive surface that splits light beam that passes through the opening into light beams at different wavelengths in the second section and focuses the light beams on different locations in the second section. Tilt angles of the aspherical surfaces in the second section change in the first direction.
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公开(公告)号：US20200257109A1
公开(公告)日：2020-08-13
申请号：US16774056
申请日：2020-01-28
Applicant: CANON KABUSHIKI KAISHA
Inventor： Hiroto Kano
Abstract: In order to provide an optical system capable of sufficiently reducing chromatic aberration, the optical system according to the present invention is an optical system including a plurality of lenses in which the following conditional expression is satisfied: | Σ i 1 υ i N i 2 ( φ i 1 + φ i 2 ) f | ≤ 3 × 1 0 - 3 , where f is a focal length of the optical system, i is an order of each of the plurality of lenses counted from an enlargement side, Ri1 and Ri2 are curvature radii of lens surfaces of an i-th lens at the enlargement side and a reduction side in a cross section including an optical axis, respectively, Ni and νi are a refractive index and an Abbe number of the i-th lens, respectively, φi1=(Ni−1)/Ri1, and φi2=(1−Ni)/Ri2.
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公开(公告)号：US11674908B2
公开(公告)日：2023-06-13
申请号：US17108661
申请日：2020-12-01
Applicant: CANON KABUSHIKI KAISHA
Inventor： Hiroki Yoshida , Kazumi Kimura , Genichiro Kudo , Hiroto Kano
CPC classification number: G01N21/94 , G02B5/005 , G02B17/084 , G02B27/4205 , G06T7/0004 , H04N23/695
Abstract: Optical system includes a front group, light-shielding member, and rear group that are arranged in this order in direction from object side toward image side. The light-shielding member is provided with opening elongated in first direction. The front group does not image the object at the opening in first section parallel to the first direction and forms intermediate image of the object at the opening in second section perpendicular to the first direction. The rear group has diffractive surface that splits light beam that passes through the opening into light beams at different wavelengths in the second section and focuses the light beams on different locations in the second section. Light beam that is emitted from the front group 11 and that enters the opening is non-parallel light in the first section.
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公开(公告)号：US20230152510A1
公开(公告)日：2023-05-18
申请号：US18054472
申请日：2022-11-10
Applicant: CANON KABUSHIKI KAISHA
Inventor： Takayuki Sugiyama , Hiroto Kano
IPC: F21V8/00
CPC classification number: G02B6/0055
Abstract: A virtual image optical system with which a virtual image is formed by introducing light from a display surface to a pupil includes a first reflective surface arranged to reflect the light from the display surface, and a second reflective surface arranged to reflect light from the first reflective surface. An optical path length from the display surface to the second reflective surface is changeable with movement of the first reflective surface, a position of the pupil is changeable with rotation of the second reflective surface in a direction having a component in a direction perpendicular to an optical path of a principal ray incident on the pupil, and an angle formed between a moving direction of the first reflective surface and the principal ray incident on the first reflective surface is 5° or less.
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Patent Agency Ranking
6.发明申请公开(公告)号：US20190107696A1
公开(公告)日：2019-04-11
申请号：US16210520
申请日：2018-12-05
Applicant: CANON KABUSHIKI KAISHA
Inventor： Hiroto Kano , Yu Miyajima
Abstract: An image forming optical system 1 includes, in order from an enlargement side, a first optical system 111 having a reflecting surface, and a second optical system 112 having a refracting surface. The image forming optical system 1 is configured to form an intermediate image 104 between the first optical system 111 and the second optical system 112. The first optical system 111 includes, in order from the enlargement side, a first reflecting group 113 having at least one reflecting surface having negative power, and a second reflecting group 114 having a plurality of reflecting surfaces 116 and 117 having positive power. The at least one reflecting surface having negative power includes a reflecting surface 115 closest to the enlargement side in the first reflecting group 113. An absolute value of power of the reflecting surface 115 is smallest in the first optical system 111.
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公开(公告)号：US20160323467A1
公开(公告)日：2016-11-03
申请号：US15095658
申请日：2016-04-11
Applicant: CANON KABUSHIKI KAISHA
Inventor： Hiroto Kano
CPC classification number: H04N1/00795 , G02B13/18 , G02B17/0852 , G03B17/17 , H04N5/2254 , H04N5/2256 , H04N2201/0081
Abstract: Provided is a reading apparatus of the present invention, including: an image pickup element configured to pick up an image of an object; a first optical system including at least one reflection surface configured to reflect a light flux from the object, the first optical system being configured to form an intermediate image of the object; and a second optical system configured to image the intermediate image onto a light-receiving surface of the image pickup element, in which: the at least one reflection surface includes a first reflection surface which is closest to the light-receiving surface on an optical path, and which has a positive power; and the following condition is satisfied: 5≦TD/IML≦20 where TD represents a maximum distance from the first reflection surface to the light-receiving surface on the optical path, and IML represents a maximum image height of the second optical system.
Abstract translation: 其中TD表示在光路上从第一反射表面到光接收表面的最大距离，IML表示第二光学系统的最大图像高度。
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公开(公告)号：US11788958B2
公开(公告)日：2023-10-17
申请号：US17529103
申请日：2021-11-17
Applicant: CANON KABUSHIKI KAISHA
Inventor： Hiroki Yoshida , Kazumi Kimura , Genichiro Kudo , Hiroto Kano
CPC classification number: G01N21/4788 , G01J3/2823 , G02B5/18 , G02B13/08
Abstract: An optical system 10 includes a front group 11, a light shielding member 4, and a rear group 12 disposed in order from a side of an object to a side of an image. The light shielding member 4 has an opening. The rear group 12 has a diffraction surface 5 and an aspherical surface 6. The aspherical surface 6 in a first section has a non-circular-arc shape. The grating spacing of the diffraction surface 5 in the first section changes from a center portion toward a peripheral portion to include an extremum value at the center portion. In the first section, the shape of at least one of a base surface of the diffraction surface 5 and an optical surface disposed closer than the diffraction surface 5 to the side of the object is asymmetric with respect to a normal line at a vertex thereof.
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公开(公告)号：US20220378289A1
公开(公告)日：2022-12-01
申请号：US17746131
申请日：2022-05-17
Applicant: CANON KABUSHIKI KAISHA
Inventor： Hiroto Kano , Tokuji Takizawa
Abstract: An optical system includes a lens unit configured to form a first intermediate image by using light from a light source, a first optical element configured to transmit the light from the first intermediate image and to move to rotationally scan a target, and a second optical element configured to guide the light from the first optical element to the target.
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公开(公告)号：US11385102B2
公开(公告)日：2022-07-12
申请号：US17108782
申请日：2020-12-01
Applicant: CANON KABUSHIKI KAISHA
Inventor： Genichiro Kudo , Hiroto Kano , Kazumi Kimura , Hiroki Yoshida
IPC: G01J3/28 , G01J3/02 , G01N21/88 , H04N5/225 , G02B3/02 , G02B5/18 , G02B13/08 , G02B17/00 , G02B27/42
Abstract: Optical system includes front group, light-shielding member, and rear group that are arranged from object side toward image side. The light-shielding member is provided with opening elongated in first direction. The front group has aspherical surface, does not image the object at the opening in first section parallel to the first direction, and forms intermediate image of the object at the opening in second section perpendicular to the first direction. The rear group has diffractive surface that splits light beam that passes through the opening into light beams at different wavelengths in the second section and focuses the light beams on different locations in the second section. The curvature radius of the aspherical surface in the second section at on-axis position in the first direction differs from that at outermost off-axis position in the first direction.
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