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.
Abstract:
An image sensor has a supporting member for integrally supporting a reading system including illuminating means for illuminating an original document, a photoelectrically converting means and imaging means for imaging light reflected by the surface of the original document onto the photoelectrically converting means, and has a member disposed on the side surface of the supporting member. The image sensor has two or more substantially independent spaces formed in the supporting member. The illuminating means, the imaging means and the photoelectrically converting means are accommodated in one of the spaces.
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.
Abstract:
A picture information input apparatus has a leading and trailing end detecting circuit for detecting the leading and trailing ends of a document to produce read out signals of "1" and "0". The leading and trailing end detecting circuit starts a first count by a document presence detecting signal of "0" from a detecting unit which detects the transfer of the document. When a hole of the document is smaller than an allowable hole diameter, it clears the counting. Only when the hole is larger than the allowable hole diameter, it starts a second count. After the second count ends, it produces a read out signal of "0" indicating that the trailing edge of the document is detected. A picture bus control circuit receives the read out signal of "1" to transmit a picture data signal to a picture transceiver, and receives the read out signal of "0" to stop the transmission of the picture data signal.
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 A 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:
PROBLEM TO BE SOLVED: To provide a light-emitting unit which emits light efficiently without regard to the shape of the opening window of a light-emitting element substrate frame material, and to provide an illuminating device using the same unit, image sensor and image reading apparatus. SOLUTION: The light-emitting unit comprises a light-emitting element, a light-emitting element substrate mounting the light-emitting element, and the light-emitting element substrate frame material having the opening window for exposing the light-emitting element. Inside of the opening window is shielded with first resin and the second resin, and the ratio of the second resin to the first resin becomes smaller from the inside of a light-emitting window toward the outside of the light-emitting window. The first resin is transparent resin, and the second resin is color resin of high brightness or resin containing a light-reflecting and/or dispersing material. A cross-sectional boundary line of the first resin and the second resin is a curved line, so that light reflected by the bottom surface of the opening window among light outgoing from the light-emitting element also can outgo to outside efficiently. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PURPOSE:To maintain preferable performance for a long period and to reduce the irregular characteristic between sensor units by continuously varying the refractive index partly with respect to the thicknesswise direction in the photoconductive layers of the sensor units and setting the refractive index near the surface of the substrate to the special value. CONSTITUTION:The photoconductive layer of the sensor unit is continuously varied in the thicknesswise direction for the refractive index at least part and the refractive index near the surface of the substrate of the photoconductive layer is 3.2 by the light of the wavelength of 6,328Angstrom . This photoconductive layer can be formed by suitably setting the conditions in case of glow discharge by a plasma CVD method, a reactive sputtering method or ion implanting method such as discharge power, substrate temperature, raw material gas composition, raw material gas. A boundary between an a-Si lower layer 2 and an a-Si layer 3 is formed to have properties in the intermediate of both the layers continuously variable in the refractive index. The substrate 1 is glass or ceramic or other material.
Abstract:
PURPOSE:To realize an a-Si photosensor, with its photoconductive layer highly immune from peeling-off, equipped with homogenous and excellent performance by a method wherein the photoconductive layer is so constructed that the refractive factor may continually change at least locally along the direction of the film thickness. CONSTITUTION:A substrate may be constituted of glass, partially glazed ceramics, or the like. In the photoconductive layer, the refractive factor changes continually along the direction of thickness, at least locally. In the vicinity of the photoconductive layer surface, the refractive factor is set to be not higher than 3.2 under a beam with the wavelength of 6,328Angstrom . Such a photoconductive layer may be constructed by a method involving plasma CVD, reactive spattering, or ion plating. During a process wherein glow discharge is accomplished, the discharge power, substrate temperature, gaseous material and its composition and pressure, etc. should be appropriately selected.
Abstract:
PURPOSE:To set a read-in timing suitably and to read in video information from the next original without inconvinience even if the hole diameter of the original is larger than the permissible vlaue, by providing the 1st and 2nd count section and a control circuit inhibiting the output of video information to an original front and tail end detecting circuit of a video input device. CONSTITUTION:An output of a voltage-current conversion circuit 21 detecting the reflected light from a surface to be scanned and outputting a voltage signal FV, and a detection output from a detection section 29 detecting the carriage of the original are applied to an original front and tail end derecting circuit 23. This detecting circuit 23 is provided with the 1st count section which counts the time corresponding to the carriage time between the detection section 29 and the surface to be scanned and outputs the count end signal, and the 2nd count section which counts the time corresponding to the permissible hole diameter and outputs the count end signal. The count is started at the 2nd count section through the detection signal of the absence of original from the detection section 29, the count end signal is outputted from the original presence signal, the output of the 1st count section is inhibited when the end signal is not outputted and the read-in timing is suitably set.