Abstract: According to an embodiment, an image reader for reading an original image formed on a surface of a recording medium is disclosed. The image reader comprises an illumination unit configured to illuminate the surface with a white light source, a light receiving unit comprising a plurality of color image sensors each configured to receive light reflected from the surface to form a monochromatic image, and an image processing synthesis unit configured to process the monochromatic images from the light receiving unit to form a synthesized image. The image reader further comprises an operation unit configured to designate a specific color, and a control unit configured to control the image processing synthesis unit to exclude, from the synthesized image processing, the monochromatic image from the color image sensor that corresponds to the specific color designated in the operation unit.

Abstract: The present invention provides a method for producing a methylene disulfonate compound including reacting, in the presence of an acid and a dehydrating agent, a formaldehyde compound with at least one salt of alkanedisulfonic acid selected from the group consisting of alkali metal salts of alkanedisulfonic acid and alkaline earth metal salts of alkanedisulfonic acid each represented by a specific formula. According to the method of the present invention, a methylene disulfonate compound can be obtained in a simple manner at low cost.

Abstract: The present invention provides a method for producing a methylene disulfonate compound including reacting, in the presence of an acid and a dehydrating agent, a formaldehyde compound with at least one salt of alkanedisulfonic acid selected from the group consisting of alkali metal salts of alkanedisulfonic acid and alkaline earth metal salts of alkanedisulfonic acid each represented by a specific formula. According to the method of the present invention, a methylene disulfonate compound can be obtained in a simple manner at low cost.

Abstract: The present invention provides a diaryl sulfone compound represented by Formula (1) below: wherein R1 to R4 and R1? to R4? are the same or different; each represents hydrogen, C1-4 alkyl, or halogen; and R5 is (thio)glycidyl, acryloyl, or the like; and a method for producing the same. According to the present invention, a novel compound useful as a monomer for producing synthetic resin having a high refractive index and excellent transparency for optical materials can be efficiently produced with a simple production process, using an inexpensive material as a starting material.

Abstract: The present invention provides a diaryl sulfone compound represented by Formula (1): wherein R1 to R4 and R1? to R4? are the same or different, and each represents hydrogen, C1-4 alkyl, or halogen, and R5 represents C2-6 alkenyl, C1-4 alkyl, or aromatic heterocyclic group; a method for producing the diaryl sulfone compound represented by Formula (1) by reacting a 4,4?-dihaloarylsulfone compound with thiol salt compound having an alkylene group; and a method for producing the diaryl sulfone compound represented by Formula (1) by reacting a 4,4?-dihaloarylsulfone compound with a thiol salt compound having a hydroxyl group, and subjecting the resulting compound to reaction with a halogenating agent, followed by a dehydrohalogenation reaction.

Abstract: According to one embodiment, an image reading apparatus includes an original document table on which an original document is placed, a detection light source configured to be disposed above the original document table, an irradiation optical system configured to irradiate the original document table with light from the detection light source from a lower surface side of the original document table, and a light guiding optical system configured to guide light reflected from the original document table toward a light detector.

Abstract: According to one embodiment, a document detecting apparatus includes a light-emitting element, a photoelectric conversion element, a light-emission controller and a detection processor. The light-emitting element projects light onto a detection position of a document. The photoelectric conversion element outputs an electric signal obtained by converting the light from the detection position of the document. The light-emission controller changes the light quantity of the light emitted by the light-emitting element. The detection processor detects the presence or absence of the document at the detection position of the document based on the presence or absence of a change of an output value corresponding to the change of the light quantity caused by the light-emission controller in an output value from the photoelectric conversion element.

Abstract: According to one embodiment, an image forming apparatus includes: a light source unit including light emitting elements for red, green, and blue; an image pickup section configured to receive, from a reference board on which light from the light source unit is irradiated, reflected light to pick up an image of the reference board; and a control section configured to control the light emitting elements of the light source unit to separately emit light, acquire separate data picked up by the image pickup section, select data having a smallest luminance value among the separate data, and control light amounts of all the light emitting elements of the light source unit with the selected data set as a reference.

Abstract: There is a light emitting device including a light source which generates light and of which the quantity of light emission changes according to a driving current, a driving circuit which runs the driving current to the light source to drive the light source, and a controller which controls the driving circuit and raises the driving current of the light source as the quantity of light emission from the light source decreases.

Abstract: A first LED that is one of a plurality of LEDs arranged in the main scanning direction is turned on, and the presence of a document on a document table glass is determined by detection of reflected light from the document using a CCD sensor, and a second LED other than the first LED in addition to the first LED among the plurality of LEDs is turned on when it is determined that a document is placed on the document table glass, and the size of the document on the document table glass is determined based on a scanning result of the CCD sensor on the reflected light from the document caused by illumination from the first and the second LEDs and a detection result of a reflective photosensor.

Abstract: According to an embodiment, an image reading apparatus includes: a light emitting body configured to emit light at illuminance lower than illuminance in reading an original document; a sensor configured to detect opening and closing of a cover; an image pickup element configured to pick up an image of the original document, on which the light from the light emitting body is irradiated, if the cover is open; and a control and determining section configured to turn on the light emitting body if the cover is opened and specify a pixel having a value exceeding a threshold from the picked-up image to determine the size of the original document.

Abstract: According to one embodiment, a reading head includes: a carriage configured to move in a sub-scanning direction with respect to a document table glass; a first light source provided to be movable integrally with the carriage and configured to illuminate a reading target position on the document table glass from an angle tilting to one side in the sub-scanning direction with respect to a reading optical axis extending in a normal direction in the reading target position on the document table glass; and a second light source provided to be movable integrally with the carriage and configured to illuminate the reading target position from a tilting angle larger than the angle of the first light source to the other side in the sub-scanning direction with respect to the reading optical axis and from a position further apart from the reading target position than the first light source.

Abstract: According to one embodiment, an image scanning apparatus includes a document glass, a substrate, a first semiconductor light emitting element, a second semiconductor light emitting element, a light guiding section, and a light receiving section. The substrate is provided below and obliquely opposed to the document glass. The first semiconductor light emitting element is mounted on a first surface of the substrate opposed to the document glass and emits light to an original document via the document glass. The second semiconductor light emitting element is mounted on a second surface on the opposite side of the first surface and emits light. The light guiding section receives incidence of the light emitted from the second semiconductor light emitting element and emits the light to the original document from a position where a normal of the document glass is present between the light guide section and the first semiconductor light emitting element.

Abstract: An image forming apparatus is provided which can form an image of excellent picture quality in which a streak does not appear at a specified position in a main scanning direction.

Abstract: According to one embodiment, an image scanning apparatus includes: a document table on which an original document is stacked; a substrate; plural first light emitting elements located on one surface of the substrate, the first light emitting elements each emitting light for irradiating the original document on the document table; and plural second light emitting elements located on the other surface of the substrate, the second light emitting elements each emitting light for irradiating the original document on the document table.

Abstract: An image scanning apparatus includes an image pickup device, a substrate connected to a terminal of the image pickup device, a heat radiation plate which is disposed between the image pickup device and the substrate and one surface of which contacts the image pickup device, and an insulating sheet which is sandwiched between the heat radiation plate and the substrate, respective surfaces of which contact the heat radiation plate and the substrate, and which electrically insulates the heat radiation plate from an electronic component on the substrate.

Abstract: An image reading apparatus includes: an image-signal output unit including plural light-emitting elements provided at equal intervals in a main scanning direction and a lens; and a driving unit configured to control electric currents applied to the light-emitting elements such that amounts of received light in the photoelectric conversion elements at both the ends in the main scanning direction supplement an amount of a light beam that is emitted from a peripheral area on a lens surface of the lens and decreases.

Abstract: In an optical wavelength converting method in which light from a laser oscillator that oscillates coherent light of an inherent wavelength ? is employed as incident light, and is made to input to a nonlinear optical crystal, and light having a wavelength of ½? is radiated, the wavelength of the incident light is 1000 nm or less, and the peak power density of the incident light is 0.1–10 fold greater than the peak power density that provides the maximum conversion efficiency. The nonlinear optical crystal is heated to and maintained at 200–600° C. Prescribed fundamental waves are input to a first crystal and a second crystal sequentially. The first crystal has a higher bulk damage threshold value with respect to the fundamental waves than that of the second crystal. The second crystal has a higher effective nonlinear constant with respect to the fundamental waves than that of the first crystal.

Abstract: An ultraviolet laser is provided that increases the conversion efficiency of laser beams when harmonics having wavelengths of less than 355 nm are generated by converting laser beams with a wavelength conversion element made of a single crystal of lithium tetraborate. A wavelength conversion element is heated and controlled to a specific temperature (for example, 200° C.) within a temperature range of 200 to 450° C. with a predetermined temperature precision.

Abstract: An ultraviolet laser is provided that increases the conversion efficiency of laser beams when harmonics having wavelengths of less than 355 nm are generated by converting laser beams with a wavelength conversion element made of a single crystal of lithium tetraborate. A wavelength conversion element is heated and controlled to a specific temperature (for example, 200° C.) within a temperature range of 200 to 450° C. with a predetermined temperature precision.