The diffusing member includes a diffusing surface with protruding portions arrayed in a first direction. The protruding portions include a first group of protruding portions in which tops thereof are arranged on a first line parallel to the first direction when they are projected on a first cross section parallel to the first direction. Frequencies of inclination angles of the first group of protruding portions ? within a range of 0??5?, ? within a range of

[00001]$\left[{\sin }^{-1}\left(\frac{1}{n}\right)+\frac{1}{2}{\sin }^{-1}\left(\frac{\sin ?}{n}\right)\right]?5?\mathrm{and}$$-\left[{\sin }^{-1}\left(\frac{1}{n}\right)+\frac{1}{2}{\sin }^{-1}\left(\frac{\sin ?}{n}\right)\right]?5?,$

and ? within a range of

[00002]$\left[{\sin }^{-1}\left(\frac{1}{n}\right)+\frac{1}{2}{\sin }^{-1}\left(\frac{\sin ?}{n}\right)\right]?5?\mathrm{and}$$ - [ sin - 1 ( 1 n< LIGHT GUIDE AND IMAGE READING APPARATUS 20190379801 · 2019-12-12 · Mitsubishi Electric Corporation · Taku Matsuzawa, Toru Shiraki, Hideki Kunishio, Daisuke Ohama 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. IMAGE PROCESSING APPARATUS, IMAGE PROCESSING METHOD AND NON-TRANSITORY COMPUTER-READABLE STORAGE MEDIUM 20190349484 · 2019-11-14 · Takahisa Yamamoto, Yoshinori Ito, Kotaro Yano By a first grouping pattern, a plurality of regions for which a filter operation is to be performed in an operation target image are grouped. Then, for each group obtained by the first grouping pattern, a first filter corresponding to the group is used to perform a filter operation on each region belonging to the group. By a second grouping pattern, a plurality of regions for which a filter operation is to be performed in an intermediate image obtained by the filter operation are grouped. Then, for each group obtained by the second grouping pattern, a second filter corresponding to the group is used to perform a filter operation on each region belonging to the group. Image reading device 11956397 · 2024-04-09 · Mitsubishi Electric Corporation · Toshiyuki SAWABE, Kosaku YAMAGATA, Hironobu ARIMOTO, Sadaaki YOSHIOKA, Takashi MAEKAWA An image reading device includes a lens array including lenses arranged in a main scanning direction and forming an erect unmagnified optical system to converge light from a reading target, a holder holding the lens array, a light receiver to receive the light converged by the lenses, and slit units. Each slit unit includes three or more light shielding plates each separating an optical path of one lens from an optical path of another lens between the lens array and the light receiver, and side plates disposed on two sides of the light shielding plates in a direction intersecting the main scanning direction and connecting two adjacent light shielding plates. The slit units are arranged in the main scanning direction, and each two adjacent slit units are arranged with a space therebetween for one optical path of one lens. IMAGE READING APPARATUS 20190335060 · 2019-10-31 · Toshiba Tec Kabushiki Kaisha · Naoyuki Misaka An image reading apparatus includes a carriage, a reference plate, a transportation mechanism, and a processor. The carriage acquires an image in a main scanning direction. The transportation mechanism transports the carriage in a sub-scanning direction. The processor causes the carriage to move in a first direction using the transportation mechanism and thereby detects foreign matter that is present on the reference plate, using the carriage. When the carriage is caused to move in the first direction and thus shading data is acquired from the reference plate, the processor reads the shading data from a data acquisition area other than an area where the foreign matter is present. If the carriage is caused to move in a second direction that is opposite to the first direction and thereby shading data is acquired from the reference plate, the processor reads the shading data from the data acquisition area. IMAGE READING APPARATUS 20190289162 · 2019-09-19 · Sueo Ueno An image reading apparatus comprises a plate with light transparency on which a sheet is to be placed, the plate including light-responsive display elements, a scanner including a first light source and a light sensor and configured to read image information of a sheet placed on the plate according to light detected by the light sensor in response to light irradiated by the first light source, and a second light source that is controlled to irradiate light on a portion of the light-responsive display elements in the plate to produce a visible image on the plate. Lighting apparatus and apparatus for reading images 10412255 · 2019-09-10 · CANON FINETECH NISCA INC. · Fumimasa Amemiya To suppress unevenness in intensity distribution of output light in a longitudinal direction of a light guide body, a lighting apparatus includes a rod-shaped light guide body, and light source units provided in end faces of the body, where the light guide body includes first and second reflecting surfaces that perform diffuse reflection on light input from the light source, and a light output surface that outputs reflected light from both of the reflecting surfaces to the outside. The first reflecting surface includes a first diffuse reflection pattern having discontinuous pattern portions provided near the end faces in the longitudinal direction of the light guide body and a continuous pattern portion in the center portion, and the second reflecting surface includes a second diffuse reflection pattern to reduce a ripple in the longitudinal direction of a quantity of the light reflected from the first diffuse reflection pattern and output. Lens unit, LED head, exposure device, and image formation apparatus 10356270 · 2019-07-16 · Oki Data Corporation · Akihiro Yamamura A lens unit according to one or more embodiments includes a lens plate member including a plurality of lenses arranged in a first direction; and a light block member provided facing the lens plate member and including a plurality of opening portions arranged in the first direction, the opening portions being provided in one-to-one correspondence with the lenses. A first positioning portion is formed at a first position in first direction of each of the lens plate member and the light block member. The first positioning portion of the lens plate member and the first positioning portion of the light block member align with each other and continuously extend in a second direction along an optical axis direction of the lenses. Lighting device and inspection device with light shield irradiation port configured to irradiate light only on the inspection region 12003689 · 2024-06-04 · KOMORI CORPORATION · Yusuke Tsumura, Takeshi Chiba, Osamu Yamamoto A lighting device (23) irradiates a web under conveyance with light. The lighting device includes a light source (43), and an irradiation port (61) configured to open linearly in a widthwise direction of the web at an end portion facing the web. The irradiation port (61) is formed between first and second parallel portions (62b, 63b) where a first plate member (62) and a second plate member (63) parallelly face each other. The web under conveyance is irradiated with linear light. It is possible to provide a lighting device capable of irradiating only an inspection region of a sheet or a web with light. Image capture using multiple illumination sources 10306092 · 2019-05-28 · YesVideo, Inc. · Sai-Wai Fu, Rolf Breuer, Christian Collins, Cris Delos Reyes, Eric Muzzi This disclosure provides a self-contained imaging device that takes digital photographs of portions of documents (such as photos or photo albums) instead of scanning those images. The imaging device uses a lens to zoom in on specific portions of the document that represent images that are to be digitized. Generally speaking, disclosed embodiments utilize a physical device having a housing, a location for retaining or holding an image to be imaged, such as a platen or image conveyance mechanism, a light source and the imaging system (which can be a digital camera). The disclosed device camera provides a low-cost mechanism that can at-once capture a high resolution image without the delays associated with most scanners. $