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1. 发明授权

US10536603B2 Light guide and image reading apparatus 有权
公开(公告)号：US10536603B2
公开(公告)日：2020-01-14
申请号：US16319527
申请日：2018-01-17
申请人： Mitsubishi Electric Corporation
发明人： Taku Matsuzawa , Toru Shiraki , Hideki Kunishio , Daisuke Ohama
IPC分类号： H04N1/04 , H04N1/028 , F21V8/00
摘要： An objective of the present disclosure is to obtain a light guide and an image reading apparatus capable of efficiently irradiating an object to be irradiated (1). The light guide and the image reading apparatus include a rod-shaped light guide main body (2) extending in the longitudinal direction, a first end face (3) that is an end face of the light guide main body (2) along the transverse direction, a light scattering pattern (5) that scatters light that enters from the first end face (3) and is guided inside the light guide main body (2), and a light emission surface portion (6) formed on the light guide main body along a longitudinal direction, the light emission surface portion (6) being a surface from which the light scattered at the light scattering pattern (5) is emitted to outside the light guide main body (2) after being reflected on a wall surface of the light guide main body (2).The light emission surface portion (6) includes a first light emission surface (6a) that is disposed near the first end face (3) in the longitudinal direction and a second light emission surface (6b) that is contiguous with the first light emission surface (6a) in the longitudinal direction. A width of the first light emission surface (6a) in the transverse direction is shorter than a width of the second light emission surface (6b) in the transverse direction.

2. 发明授权

US10674030B2 Illumination device and image reading device 审中-公开
公开(公告)号：US10674030B2
公开(公告)日：2020-06-02
申请号：US16475445
申请日：2018-02-21
申请人： Mitsubishi Electric Corporation
发明人： Taku Matsuzawa , Toru Shiraki , Hideki Kunishio , Daisuke Ohama
IPC分类号： H04N1/04 , H04N1/028 , G02B6/00 , G03B27/54
摘要： An illumination device includes a light source and a rod-like light guide extending in a longitudinal direction for guiding incident light to an object to be illuminated. The light source is disposed at an end of the light guide extending in a longitudinal direction. The light guide includes an incident surface at the longitudinal end to receive light emitted from the light source, a flat emission surface to emit light incident on the light guide toward the object to be illuminated, a parabolic reflective surface to reflect, toward the emission surface, light from a focus of the paraboloid shape of the refractive surface or light passing through the focus from a predetermined area, and a light-scattering portion, having a predetermined area, to scatter light entering through the incident surface and reflect the light toward the reflective surface. The light-scattering portion is placed at the focus of the paraboloid shape or at a position where light reflected by the scattering area on the light-scattering portion passes through the focus.

3. 发明授权

US10999456B2 Image reading device 有权
公开(公告)号：US10999456B2
公开(公告)日：2021-05-04
申请号：US16618686
申请日：2018-12-07
申请人： Mitsubishi Electric Corporation
发明人： Daisuke Ohama , Hideki Kunishio , Masaaki Okada , Yuki Okuhigashi , Masahiko Takashina , Masaki Wakisaka
IPC分类号： G06F3/12 , H04N1/00 , H04N1/028 , H04N1/193
摘要： An image reading device includes light guides (5, 6) that emit light to an object to be read, a lens body (8) that condenses reflected light, a light receiver (13) that receives the reflected light, a sensor board (24) on which is mounted the light receiver (13), a lens holder (11), and a housing (9) that houses or holds these components. The lens holder (11) includes a holder bottom (11g), light guide positioners (11a, 11b) and lens body holders (11e, 11f). In the lens holder (11), the lens body (8) is attached between the lens body holders (11e, 11f), the sensor board (24) is attached to the holder bottom (11g) such that the light receiver (13) aligns with an optical axis of the lens body (8), and the light guides (5, 6) are attached to the light guide positioners (11a, 11b). A surface of each light guide positioner (11a, 11b) that faces the corresponding light guide (5, 6) to be attached has at least a portion having a same shape a s a shape of a surface of the light guide.

4. 发明申请

US20190379801A1 LIGHT GUIDE AND IMAGE READING APPARATUS 审中-公开
公开(公告)号：US20190379801A1
公开(公告)日：2019-12-12
申请号：US16319527
申请日：2018-01-17
申请人： Mitsubishi Electric Corporation
发明人： Taku MATSUZAWA , Toru Shiraki , Hideki Kunishio , Daisuke Ohama
IPC分类号： H04N1/028 , F21V8/00 , H04N1/04
摘要： An objective of the present disclosure is to obtain a light guide and an image reading apparatus capable of efficiently irradiating an object to be irradiated (1). The light guide and the image reading apparatus include a rod-shaped light guide main body (2) extending in the longitudinal direction, a first end face (3) that is an end face of the light guide main body (2) along the transverse direction, a light scattering pattern (5) that scatters light that enters from the first end face (3) and is guided inside the light guide main body (2), and a light emission surface portion (6) formed on the light guide main body along a longitudinal direction, the light emission surface portion (6) being a surface from which the light scattered at the light scattering pattern (5) is emitted to outside the light guide main body (2) after being reflected on a wall surface of the light guide main body (2).The light emission surface portion (6) includes a first light emission surface (6a) that is disposed near the first end face (3) in the longitudinal direction and a second light emission surface (6b) that is contiguous with the first light emission surface (6a) in the longitudinal direction. A width of the first light emission surface (6a) in the transverse direction is shorter than a width of the second light emission surface (6b) in the transverse direction.

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