• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    1516526 Scanning systems XEROX CORP 17 Oct 1975 [23 Dec 1974] 42688/75 Heading G2J A scanning system comprises a light source 10 (e.g. a laser) whose beam is modulated at 14 and vertically deflected at 18 before reflection at 20. The beam is broadened in the tangential plane by a cylindrical lens 23 and focused by spherical lens 26 such that the facets of a rotating polygon scanner 28 are illuminated by a wide narrow beam 32 or 33 across about two facets, the reflected beam being brought to a focus via a saggital plane cylindrical lens 34 at a photo-receptor 36. The facets of the polygon are narrower at their base than at the top, and the position of the beam 32 (or 33) is adjusted by the vertical deflector 18. It is stated that the size of the spot may thereby be controlled. The polygon scanner may be replaced by a single oscillating facet. The facets may have portions of discretely differing width rather than the continuous variation shown in Fig. 1.
    公开号:SU833178A3
    申请号:SU752192852
    申请日:1975-11-20
    公开日:1981-05-23
    发明作者:К.Старкветер Гари
    申请人:Ксерокс Корпорейшн (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to radio engineering and can be used in digital printing systems.
    A device is known for recording information on a photosensitive material containing a sequentially located laser, a light modulator, a reflecting mirror, two lenses, a rotating multi-faceted mirror drum and a recording medium [1].
    However, the known device does not provide sufficient recording quality.
    The purpose of the invention is to improve the quality of recorded information by ’’ resizing the aperture of the scanning beam.
    This goal is achieved by the fact that in the device for recording information “on a photosensitive material containing a sequentially located laser, a light modulator, a reflective mirror, two lenses, a rotating multifaceted mirror drum 25 and a recording medium, a deflector inserted between the light modulator and the reflective mirror is inserted, when the lower part of each face of the rotating multifaceted mirror drum __ has a reflective surface with different widths BIDDERS whether kami in directions perpendicular to the axis of rotation I.
    The drawing shows the proposed device, General view.
    The information recording device comprises a laser 1, a light modulator 2, a deflector 3, a reflecting mirror 4, two lenses 5 and 6, a rotating multi-faceted mirror drum 7, a recording medium 8, a cylindrical lens 9.
    A light source, such as a laser 1, provides an initial light beam 10 for use by its scanning system. The laser 1 generates a parallel beam of monochromatic light, is modulated using an electro-optical modulator 2 in accordance with the information contained in the video signal. The modulated beam 11 is received by the deflector 3, which is located between the modulator 2 and the reflecting mirror 4, and deflects the beam in accordance with the information contained in the electrical signal. The drawing shows two beams .12 and 13 emerging from the deflector 3. At this point in time, only one beam 12 is deflected up by the deflector 3 with respect to the reflecting mirror 4, while the beam is deflected by the deflector 3 down with respect to the reflecting mirror 4. Consider the path beam 12 (indicated in the drawing as 12a, 12b and 12c), but the same description applies to beam 13 (except for those cases where this is specifically indicated).
    5 cylindrical and spherical lenses b images are arranged in the optical path between reflecting mirror 4 and rotating multifaceted grain-'w Calne drum 7. The energy density of the lens 5 is located in a tangential plane which is perpendicular to the axis of rotation of the rotary polyhedral mirror baraba- 15 to 7. The lens 5 focuses the parallel beam at its focal point, after which the beam 12 diverges or expands in the energy plane to form 12a. Beam 12a remains parallel in the sagittal plane. The spherical image lens 6 causes the beam 12a to converge to the shape of the beam 12b in the tangential and sagittal planes on at least 25 two faces 14 of the rotating multi-faceted mirror drum 7. The distribution of the beam on the rotating multi-faceted mirror drum 7 has a width of the order of forty millimeters (the width of both faces) in the direction of scanning one millimeter in height in a direction parallel to the axis of rotation of the rotating multifaceted mirror drum 7. A cylindrical lens. 9 located between the rotating nogogrannym mirror drum and the recording carrier 8 is on the way 12c ray otrazhennogo'ot rotating multifaceted mirror drum 7. Energy CYLINDRICAL Coy lens plane 9 is in sagettalnoy plane. Lenses 5 and b and 9 work together to focus the beam 12 in a tangential plane within the depth of focus that is on the surface of the recording medium 8. The rotating polyhedral mirror drum 7 has a plurality of faces 14, the upper part 1'5 of each of which has a reflective surface over the entire width of the face W., and the lower half has a part 16 that is essentially non-reflective and has a shape such that the reflective part 17, adjacent to the non-reflective surface, has a variable width oi. The non-reflective portion 16 may be painted black. The size of the light spot on the information carrier 8 in the scanning direction 'varies with the effective beam width at the edge 14, and the wider the beam, the smaller the spot, and vice versa. The effective beam distribution width 18 on the reflective portion 15 of the face 14 has a face width W, while the effective beam distribution width 19 on the reflective portion 17 of the face 14 has a smaller width equal to and. " As a result, the recording medium 8 scans a smaller color spot when the beam is directed to part 15 than in the case when the beam is directed to part 17. Therefore, the size of the beam is changed by the video signal ”! Entering the deflector 3 to deflect the beam from one reflective zone to another on the side 14. The height of the usual face of the rotating polyhedral mirror drum 7 is about ten millimeters. With a beam height equal to one millimeter, the beam occupies ten different positions on the face 14 and, if we consider a beam that overlaps different positions, these positions can be even more. The deflector 3 is designed to move the beam to any of these positions in accordance with the video signal applied to the deflector 3 to change the size of the light spot. Obviously, the number of available spot sizes depends on a predetermined design of the shape of the reflective surface.
    This feature of changing the size of the light spot is very convenient for improving gray scale transmission by enabling continuous change in the size of the light spot. Suppose that there is a black-and-white picture, and the space between the black dots is changed by changing the size of the light spot, which leads to a constant quality of the gray scale. This is in contrast with a system using a constant light spot size, in which the space between the light spots is constant and resulting in lower gray scale transmission quality. ’
    权利要求:
    Claims (1)
    [1]
    1. US Patent No. 3647956, 1kl. H 04 N 1/04, 1972 (prototype).
    19 Ch 7/4
    类似技术:
    公开号 | 公开日 | 专利标题
    SU833178A3|1981-05-23|Data recording device
    EP0299964B1|1991-10-16|Scanning apparatus
    US3750189A|1973-07-31|Light scanning and printing system
    US6219168B1|2001-04-17|Single rotating polygon mirror with adjacent facets having different tilt angles
    US4040096A|1977-08-02|Flying spot scanner with runout correction
    US3995110A|1976-11-30|Flying spot scanner with plural lens correction
    US5526166A|1996-06-11|Optical system for the correction of differential scanline bow
    US6292285B1|2001-09-18|Single rotating polygon mirror with v-shaped facets for a multiple beam ROS
    US5550668A|1996-08-27|Multispot polygon ROS with maximized line separation depth of focus
    US4070089A|1978-01-24|Two dimensional laser scanner with movable cylinder lens
    US3984171A|1976-10-05|Linear scan system
    US4759593A|1988-07-26|High resolution optical scanner
    GB1491516A|1977-11-09|Information recording apparatus
    US3972582A|1976-08-03|Laser beam recording system
    US4563056A|1986-01-07|Optical system for laser printer
    US5510826A|1996-04-23|Optical scanning apparatus
    KR100335624B1|2002-11-22|Laser beam scanning apparatus
    US4272151A|1981-06-09|Apparatus for optical scanning
    US4006299A|1977-02-01|Flat field scanning system
    US4435733A|1984-03-06|Flying spot scanner for laser printer
    US4156555A|1979-05-29|Apparatus and method for providing unblurred images with a continuously scanned light beam
    EP0843192A1|1998-05-20|Scanning optical device
    US4270149A|1981-05-26|Laser beam facsimile apparatus
    US5343326A|1994-08-30|Compact ros imaging system
    US5392060A|1995-02-21|Half tone laser recording apparatus
    同族专利:
    公开号 | 公开日
    JPS5184646A|1976-07-24|
    DE2552632A1|1976-07-01|
    BE835552A|1976-03-01|
    SE7514206L|1976-06-24|
    FR2296195B1|1980-02-22|
    CA1043601A|1978-12-05|
    NL7514351A|1976-06-25|
    US3944323A|1976-03-16|
    SE403024B|1978-07-24|
    GB1516526A|1978-07-05|
    FR2296195A1|1976-07-23|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2818465A|1954-06-15|1957-12-31|Time Inc|Half-tone dot facsimile system|
    US2882792A|1954-09-10|1959-04-21|Fairchild Camera Instr Co|Luminous output transducer|
    US3488102A|1966-03-25|1970-01-06|Technical Operations Inc|Laser beam scanning apparatus|
    US3809806A|1972-10-18|1974-05-07|Columbia Broadcasting Syst Inc|Banding correction system for film recording apparatus|JPS5421123B2|1975-06-18|1979-07-27|
    US4076416A|1976-05-03|1978-02-28|Xerox Corporation|Illumination slit for and a process of use thereof in a reproducing machine|
    US4070089A|1976-07-01|1978-01-24|Xerox Corporation|Two dimensional laser scanner with movable cylinder lens|
    JPS6010284B2|1976-09-03|1985-03-16|Canon Kk|
    JPS6011325B2|1977-01-21|1985-03-25|Canon Kk|
    US4170028A|1977-04-06|1979-10-02|Xerox Corporation|Facet tracking in laser scanning|
    DE2720790C2|1977-05-09|1983-10-20|Siemens AG, 1000 Berlin und 8000 München|Holding device for optical components in a printer operating on the electrophotographic principle|
    DE2827074C2|1977-06-21|1990-10-04|Canon K.K., Tokio/Tokyo, Jp|
    JPS6151461B2|1981-03-19|1986-11-08|Minolta Camera Kk|
    USRE33931E|1981-12-21|1992-05-19|American Semiconductor Equipment Technologies|Laser pattern generating system|
    US4559562A|1983-08-16|1985-12-17|Xerox Corporation|Microdeflector facet tracker for scanning system|
    US4518218A|1983-09-26|1985-05-21|Magnavox Government And Industrial Electronics Co.|Stepped polygon scan mirror|
    US4971413A|1987-05-13|1990-11-20|Nikon Corporation|Laser beam depicting apparatus|
    JPS6446724A|1987-08-17|1989-02-21|Canon Kk|Image recorder|
    JPH02115814A|1988-10-25|1990-04-27|Dainippon Screen Mfg Co Ltd|Light beam scanning device|
    US4978185A|1989-10-25|1990-12-18|Xerox Corporation|Raster scanning system utilizing overfilled polygon facet design with non-reflective facet edges|
    US5247383A|1990-03-20|1993-09-21|Olive Tree Technology, Inc.|Scanner with a post facet lens system|
    US5196957A|1990-03-20|1993-03-23|Olive Tree Technology, Inc.|Laser scanner with post-facet lens system|
    US5166944A|1991-06-07|1992-11-24|Advanced Laser Technologies, Inc.|Laser beam scanning apparatus and method|
    US6008925A|1991-06-07|1999-12-28|Advanced Laser Technologies, Inc.|Light beam scanning apparatus and method|
    US5278691A|1992-06-24|1994-01-11|Eastman Kodak Company|Symmetrical overfilled polygon laser scanner|
    US5381259A|1993-10-14|1995-01-10|Xerox Corporation|Raster output scannerusing an overfilled polygon design with minimized optical path length|
    JPH07199104A|1993-12-28|1995-08-04|Fuji Xerox Co Ltd|Laser optical system device|
    US5781325A|1994-12-19|1998-07-14|Fuji Xerox Co., Ltd.|Optical scanning apparatus|
    US5923475A|1996-11-27|1999-07-13|Eastman Kodak Company|Laser printer using a fly's eye integrator|
    US5867298A|1996-12-16|1999-02-02|Eastman Kodak Company|Dual format pre-objective scanner|
    US5861977A|1997-02-26|1999-01-19|Eastman Kodak Company|Dual format dual resolution scanner with off-axis beams|
    US6091461A|1997-08-14|2000-07-18|Sony Corporation|Electronically self-aligning high resolution projection display with rotating mirrors and piezoelectric transducers|
    US6072519A|1997-10-30|2000-06-06|Eastman Kodak Company|Dual resolution printer|
    US6023059A|1998-01-14|2000-02-08|Eastman Kodak Company|Dual format pre-objective scanner|
    US6542304B2|1999-05-17|2003-04-01|Toolz, Ltd.|Laser beam device with apertured reflective element|
    US10591598B2|2018-01-08|2020-03-17|SOS Lab co., Ltd|Lidar device|
    KR102050678B1|2018-05-14|2019-12-03|주식회사 에스오에스랩|Lidar device|
    TW201946719A|2018-05-02|2019-12-16|國立清華大學|Portable surface finishing device based on coherent light source|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US05/535,395|US3944323A|1974-12-23|1974-12-23|Variable spot size scanning system|
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