Abstract:
PROBLEM TO BE SOLVED: To reduce or eliminate a moire pattern, especially in the high-speed scanning direction. SOLUTION: By giving a this photosensitive array high-speed and low-speed scanning directions and includes a chip and an array of photo sites of complementary forms. Maximum dimensions in the high-speed scanning direction of at least one photo site are larger than the pitch between photo sites adjacent in the high-speed scanning direction, and each photo site has a photoelectric detection device, and photo sites are equal in surface area, or the photosensitive array includes an array of photo sites, which are fitted to each other on the chip, and each photo sites has a photoelectric detection device, and photo sites are equal in surface area, and by a photoreceptive array with photo sites placed on the same line, problem is resolved.
Abstract:
PROBLEM TO BE SOLVED: To provide a full color photosensitive device in which the integrating time of each photogate can be controlled easily for each pixel. SOLUTION: The photosensitive device has first and second photogates each generating charges in response to received light. The charges flow into a phototransfer gate depending on the potential difference between the photogate and the phototransfer gate coupled therewith. A common node 10 coupled with first and second phototransfer gates is coupled with an output line. A reset gate is arranged at a reset node 12 on the output line and applies a specified reset potential to the reset node 12 as required. A clearing gate arranged on the output line between the common node 10 and the reset node 12 can apply a specified potential onto the common node 10 thus removing charges entirely from at least one photogate.
Abstract:
PROBLEM TO BE SOLVED: To provide a small spectrophotometer of low cost for performing color measurements of an output printed matter in-line. SOLUTION: In a system 300, a collimating lens is not arranged between a refractive index distribution type lens 304 and a linear and adjustable filter 306, and the linear and adjustable filter 306 is separated from a linear sensor 308 by a clearance G. An irradiation device 301 has a light beam irradiated toward a toner image 302A on an image support surface 302. The linear sensor 308 receives the light beam reflected from the toner image 302A on the image support surface 302. The light beam reflected from the toner image 302A on the image support surface 302 is turned to the linear sensor 308 by the refractive index distribution type lens 304. The refractive index distribution type lens 304 is arranged between the image support surface 302 and the linear and adjustable filter 306. The linear and adjustable filter 306 is arranged between the linear sensor 308 and the refractive index distribution type lens 304. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an illuminator having appropriate illumination distribution all over a wide area. SOLUTION: The present invention provides an optical component for transmitting light emitted from a linear array of light sources and including a light-transmissive member having a refractive index of about 1.4 to about 1.8. The light-transmissive member defines an entry surface for disposal near the light sources, the entry surface defining at least one set of prisms, and an exit surface and a section of a DCPC (dielectric compound parabolic concentrator) between the entry surface and the exit surface. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a photosensitive apparatus in which the space of a switching element on a chip is reduced and a moire effect is reduced, with respect to a CMOS-based image sensor array which is used for a raster input scanner such as a digital copier or other office equipment. SOLUTION: This photosensitive apparatus includes a first optical sensor 10A and an MOS element operating in a linear region. The apparatus is provided with a first switching element PDA for receiving signals from the first optical sensor 10A, and a transmitting element 20 provided on a downstream of the switching element PDA and including at least one MOS element T1 operating in a sub-threshold region. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To obviate fixed-pattern noise and thermally-induced noise in photosensitive device employing fat zero charges. SOLUTION: In the photosensor wherein a photodiode 10 is operated by placing an initial fat zero charge thereon before the integration of a light- induced signal, the actual dark level signal created by the fat zero charge is sampled with each readout from the photodiode, and then retransferred to the photodiode. After integration, the sampled dark level is subtracted from the total signal level on the photodiode. In this way both fixed-pattern noise and thermally-induced noise are obviated. COPYRIGHT: (C)2003,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide a low-cost and fast spectrophotometer that especially is suited for an on-line color print color control system. SOLUTION: A plurality of test patches having different colors are simultaneously irradiated, and color analysis is made essentially simultaneously and separately. A small number of test print sheets where a compact test patch, where a plurality of different colors are adjacent, is printed in a plurality of sets may be used. The reflection image of color test patches having a plurality of different colors is simultaneously focused on different regions in a light detection chip 14, a plurality of sets of light sites reacting with different colors are exposed to light, and a plurality of different color signals may be provided to each of different color test patch images.
Abstract:
PROBLEM TO BE SOLVED: To provide illumination which is uniform along a narrow band of a document and suitable across the narrow band of document. SOLUTION: An optical element 10 is formed of a light transmitting material with an arbitrary predetermined refractive index. The optical element 10 is defined by a curved incident surface 12, an outgoing surface 14 facing the incident surface, a first parabolic surface 16 defined between the first edge of the incident surface and the first edge of the outgoing surface, and a second parabolic surface 18 defined between the second edge of the incident surface and the second edge of the outgoing surface. Respective parabolic surfaces 16, 18 effectively form a CPC. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a full-width array spectrophotometer for full-width scan color analysis of a printed printing medium sheet. SOLUTION: This spectrophotometer of the present invention has at least one substantially linear long irradiation array including a large number of LED illumination sources arranged adjacently to emit a plurality of different colors of emission lights, in a pattern repeated with at least four different colors extended sufficiently and substantially linearly to cross a printer pater sheet route substantially laterally for irradiating a lateral-directional irradiation band extended lateral-directionally over the printed printing medium sheet moving on the printer pater sheet route, continuously with the plurality of colors of emission lights, and a full-width array light image formation bar arranged adjacently to the at least one substantially linear array including the large number of LED illumination sources arranged adjacently to emit the plurality of different colors of the emission lights, and including a long array including a plurality of adjacently arranged photodetectors for the plurality of colors extended substantially parallel to the array. The light image formation bar is positioned to receive light reflected from the lateral-directional irradiation band extended lateral-directionally over the printing medium sheet moving on the pater sheet route. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a system and method for detecting contaminants in a field of view of an imaging array, in a digital scanning system. SOLUTION: A plurality of rows or sets of discrete sensors constituting the imaging array collect image data (S1100). Based on the viewpoint that positionally redundant information, regarding individual lines or sets, is included, the image data are compared to the other image data between the lines or sets (S1300). Contaminants in the field of view of the imaging array are detected through this comparison, which would otherwise appear as streaks. COPYRIGHT: (C)2005,JPO&NCIPI