公开(公告)号：US09423610B2

公开(公告)日：2016-08-23

申请号：US14995497

申请日：2016-01-14

Applicant: Konica Minolta, Inc.

Inventor： Makoto Ooki ,  Masahiko Takahashi ,  Wataru Senoo

IPC: G03G15/00 ,  G02B26/12 ,  G02B26/10 ,  G02B27/00 ,  G03G15/04

CPC classification number: G02B26/125 ,  G02B27/0018 ,  G03G15/04036

Abstract: An optical scanning apparatus has a first scanning optical element having a negative power in a sub-scanning direction. A first light beam and a second light beam enter the first scanning optical element through points of an input surface on a same side of a reference surface, which includes an optical axis of the first scanning optical element and being parallel to a main-scanning direction. The second light beam makes a greater angle with the reference surface than the first light beam. A first angle between the reference surface and a principal ray of a first ghost light beam is greater than a second angle between the reference surface and a principal ray of a first normal light beam and is smaller than a third angle between the reference surface and a principal ray of a second normal light beam.

Abstract translation: 光学扫描装置具有在副扫描方向上具有负功率的第一扫描光学元件。 第一光束和第二光束通过参考面的同一侧的输入面的点进入第一扫描光学元件，该基准面包括第一扫描光学元件的光轴并平行于主扫描方向 。 第二光束与参考表面比第一光束形成更大的角度。 参考表面和第一重影光束的主光线之间的第一角度大于参考表面和第一正常光束的主光线之间的第二角度，并且小于参考表面和第一正射光束之间的第三角度 第二普通光束的主光线。

公开(公告)号：US20190286006A1

公开(公告)日：2019-09-19

申请号：US16355342

申请日：2019-03-15

Applicant: Konica Minolta, Inc.

Inventor： Takafumi Yuasa ,  Hidenari Tachibe ,  Masayuki Iijima ,  Makoto Obayashi ,  Wataru Senoo

IPC: G03G15/043 ,  G02B26/12 ,  G02B27/09 ,  G02B27/30 ,  G03G15/04

Abstract: An optical scanning device that scans a photoreceptor with light, the device includes: a light emitter that emits light according to a supply current amount; a source-side optical system that includes an optical element corresponding to the light emitter, the optical element transmitting and shaping the light emitted from the corresponding light emitter; a polygon mirror that cyclically deflects the light shaped by the source-side optical system; an image-side optical system that condenses the light deflected by the polygon mirror on a surface of the photoreceptor; a motor that rotates the polygon mirror; and a light source controller that: monitors a temperature of the optical element; and adjusts the supply current amount for the light emitter or adjusts the temperature of the optical element corresponding to the light emitter to make a temperature difference between the light emitter and the corresponding optical element fall within an allowable range.

公开(公告)号：US10809643B2

公开(公告)日：2020-10-20

申请号：US16355342

申请日：2019-03-15

Applicant: Konica Minolta, Inc.

Inventor： Takafumi Yuasa ,  Hidenari Tachibe ,  Masayuki Iijima ,  Makoto Obayashi ,  Wataru Senoo

IPC: G03G15/043 ,  G02B26/12 ,  G03G15/04 ,  G02B27/30 ,  G02B27/09

Abstract: An optical scanning device that scans a photoreceptor with light, the device includes: a light emitter that emits light according to a supply current amount; a source-side optical system that includes an optical element corresponding to the light emitter, the optical element transmitting and shaping the light emitted from the corresponding light emitter; a polygon mirror that cyclically deflects the light shaped by the source-side optical system; an image-side optical system that condenses the light deflected by the polygon mirror on a surface of the photoreceptor; a motor that rotates the polygon mirror; and a light source controller that: monitors a temperature of the optical element; and adjusts the supply current amount for the light emitter or adjusts the temperature of the optical element corresponding to the light emitter to make a temperature difference between the light emitter and the corresponding optical element fall within an allowable range.

公开(公告)号：US10088674B2

公开(公告)日：2018-10-02

申请号：US13857784

申请日：2013-04-05

Applicant: KONICA MINOLTA, INC.

Inventor： Wataru Senoo ,  Hideo Uemura ,  Makoto Ooki

IPC: G02B26/10 ,  G02B5/08 ,  G02B26/12

Abstract: In a laser scanning optical system, at least one of one or more scanning optical elements is made of a material having a photoelastic coefficient equal to or greater than 20×10−12 [Pa−1]; wherein at least one of one or more reflectors comprises a basal plate, and a metal film and a single-layer optical thin film evaporated on the basal plate; wherein the single-layer optical thin film has a thickness greater than 0.15λ and less than 0.40λ, wherein λ is a wavelength of the light beam; and wherein the light beams heading to both ends of an effective scanning range of the imaging surface, of which image heights are maximum, enter the one or more reflectors at angles of incidence equal to or greater than 10 degrees and less than 55 degrees.

公开(公告)号：US10534298B2

公开(公告)日：2020-01-14

申请号：US15641531

申请日：2017-07-05

Applicant: Konica Minolta, Inc.

Inventor： Masahiko Takahashi ,  Makoto Ooki ,  Wataru Senoo ,  Atsushi Nagaoka ,  Hidenari Tachibe ,  Hajime Taniguchi ,  Takafumi Yuasa ,  Yoshitaka Otani

IPC: H04N1/00 ,  G03G15/00 ,  G01D5/34

Abstract: In a displacement sensor, an illumination optical system, which converts laser light emitted from an emission unit into first converging light, and irradiates with the first converging light a detection space through which a target moves. An imaging optical system converts laser light reflected from the target into second converging light, and irradiates with the second converging light a light-receiving surface of a detection unit. The image of the emission unit into which the illumination optical system focuses the first converging light is displaced along the optical axis of the imaging optical system by a temperature change of the illumination optical system. The range in which the image is displaced is limited to be located either anterior to the front principal point of the imaging optical system, or posterior to the rear principal point of the imaging optical system.