Abstract:
A photosensor comprising a photoconductive layer provided on a substrate. The layer contains amorphous silicon. At least a portion of the layer has a refractive index varying continuously through the thickness of the layer. The refractive index of the layer is 3.2 or less at a wavelength of 6,328 .ANG. in the vicinity of the surface of the substrate. A pair of electrodes are provided in electrical contact with the photoconductive layer. A photoreceptor is also provided, part of which is constituted by the spacing between the electrodes of the pair.
Abstract:
A method and apparatus for reducing image unevenness due to light emission of a transfer element. Namely, when a printing speed is changed to 1/2n (n is a positive integer), a SLED head controller repeats a cycle to perform exposure control for one line and then stops the exposure control for the lines corresponding to 1/2n speed. For example, in the 1/2 speed (i.e., n=1), transfer and light emission driving are performed at an initially set maximum speed, and the cycle when the exposure control for one line is stopped after the one-line exposure control is repeated. The printing speed is changed on the basis of the type or kind of recording medium used.
Abstract:
PROBLEM TO BE SOLVED: To provide an image sensor apparatus which drastically improves heat dissipation efficiency of image sensor elements such as a CCD. SOLUTION: The image sensor apparatus 17 converting a reflected light from an image side of an original into an electric signal has: a base board 40, and an optical transmission means for transmitting the reflected light and a photoreceptive means 30 for receiving the reflected light which are provided on the base board 40. The photoreceptive means 30 and the optical transmission means 42 are arranged so that the reflected light passes the optical transmission means 42 and is incident to the photoreceptive means 30. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
본 발명에 따른 화상 판독 장치에서는, 프리 스캔에 있어서, 광학 필름(1)상에 기록된 복수의 화상이 가장 새로운 코마로부터 순서대로 소정의 샘플링 레이트로 판독되도록 CCD 라인 센서(5) 및 필름 반송 롤러(103)를 제어하여, 코마의 좌우단의 위치 등을 나타내는 코마 위치 데이터를 생성한다. 그리고, 본 스캔에 있어서, 광학 필름 상에 기록된 복수의 화상이 가장 오래된 코마로부터 순서대로, 상기 소정의 샘플링 레이트보다도 높은 샘플링 레이트로 판독되도록 CCD 라인 센서(5) 및 필름 캐리어(100)를 제어할 때에, 프리 스캔으로 얻어진 코마 위치 데이터에 기초하여 CCD 라인 센서(5)의 판독 개시 타이밍 및 종료 타이밍을 제어한다. 이 결과, 본 화상 판독 장치에서는, 코마의 화상의 화상 데이터를 위치가 어긋나지 않게 정확하게 얻을 수 있다. 또한, 프리 스캔을 낮은 샘플링 레이트로 행하고 있기 때문에, 코마 위치 데이터를 단시간에 얻을 수 있다.
Abstract:
PROBLEM TO BE SOLVED: To provide an image reading unit which can dissipate heat more efficiently by a simple configuration. SOLUTION: The image reading unit 1 includes: a sheet conveyance way 5 which can convey a sheet 40 becoming a document when an image is read; an LED 25 which emits light with which the sheet 40 is irradiated; a conduction portion 20 which is provided to transmit heat generated by the LED 25 from the LED 25 and can propagate the heat thus transmitted; and a heat dissipation portion 10 constituting a part of the sheet conveyance way 5 and to which the heat transmitted from the LED 25 to the conduction portion 20 can be propagated therefrom so that the heat propagated from the conduction portion 20 is dissipated to air flowing through the sheet conveyance way 5 when the sheet 40 is conveyed. Consequently, the heat generated from the LED 25 is transmitted to the conduction portion 20, propagated from the conduction portion 20 to the heat dissipation portion 10, and further dissipated from the heat dissipation portion 10 to the air flowing through the sheet conveyance way 5 when the sheet 40 is conveyed. As a result, heat can be dissipated more efficiently by a simple configuration. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a light-emitting unit for a luminaire having superior heat radiation performance. SOLUTION: The light-emitting unit comprises: a light-emitting element; a light-emitting element substrate for mounting the light-emitting element; a light-emitting element substrate frame material having an opening window for exposing the light-emitting element; and electrodes for feeding power to the light-emitting element. In this case, the light-emitting substrate is a metal, and the light-emitting element is mounted onto the light-emitting element substrate directly. Alternatively, the light-emitting element substrate is a metal, a metal oxide film is provided on the light-emitting element substrate, and the light-emitting element is mounted on the electrode formed on the metal oxide film. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
A device for inspecting a printed board has linear image sensors. The image sensors read the image of the printed board on respective image reading positions (CA0, CB0, CA1, CB1), while scanning the image. A predetermined tolerance range (RY) for image-reading positions is previously determined so that the respective image reading positions are included in the tolerance range. Image signals obtained in respective image sensors are delayed by respective delay times. The respective delay times are previously determined in proportion to the deviations between the image reading positions and a reference position (RLY1), where the reference position is defined on the rear end (EPY1) or behind the tolerance range in the scanning direction (-Y). Through the delay process, all of the image signals are corrected to compensate for the respective deviations in the image reading positions.
Abstract:
In connection with graphical drum scanning a very high accuracy of the drum is required and the scanner unit has to be very accurately adjusted. The invention provides for different purely dynamic adjustment methods, which enable a significant reduction of the accuracy requirements and therewith a reduced price of the scanner units.
Abstract:
A beam position sensor for a beam scanner is disclosed for use in a laser printer. The printer comprises three diode lasers each of which emits at a different wavelength. The beams from the three lasers are combined by the use of dichroic plates to form one combined beam. The combined beam is scanned onto a receiving medium by a polygon. The beam position sensor of the present invention is adapted to sense the position of the polygon in order to provide a synchronizing signal which will insure that each raster line in the printer is started at the proper position. The beam position sensor includes a diode laser and optics for projecting a beam from the laser onto the polygon. The beam is reflected back from the polygon into a photodetector which effects the start of a new raster line at the appropriate time. In order to minimize the number of optical elements in the beam position sensor and to simplify the device, the diode laser and the photodetector are located along the same optical axis.
Abstract:
A thermal printer is disclosed which is particularly suitable for making slide transparencies. The printer includes a laser which provides the necessary thermal energy to effect a transfer of dye from a donor element to a receiver element. A beam from the laser passes through suitable optics and is scanned onto the receiver element by a galvonometer. In order to insure the transfer of dye from the donor at a suitable resolution and with sufficient speed, a relatively high-powered single transverse mode coherent laser is used.