KR930021398A - Holographic laser scanning unit for laser printers - Google Patents

Holographic laser scanning unit for laser printers Download PDF

Info

Publication number
KR930021398A
KR930021398A KR1019920006976A KR920006976A KR930021398A KR 930021398 A KR930021398 A KR 930021398A KR 1019920006976 A KR1019920006976 A KR 1019920006976A KR 920006976 A KR920006976 A KR 920006976A KR 930021398 A KR930021398 A KR 930021398A
Authority
KR
South Korea
Prior art keywords
hologram
laser beam
laser
angle
distance
Prior art date
Application number
KR1019920006976A
Other languages
Korean (ko)
Other versions
KR960010411B1 (en
Inventor
양근영
노성우
Original Assignee
이헌조
주식회사 금성사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 이헌조, 주식회사 금성사 filed Critical 이헌조
Priority to KR92006976A priority Critical patent/KR960010411B1/en
Priority to GB9308398A priority patent/GB2266785B/en
Priority to JP5099699A priority patent/JPH06102465A/en
Publication of KR930021398A publication Critical patent/KR930021398A/en
Application granted granted Critical
Publication of KR960010411B1 publication Critical patent/KR960010411B1/en

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/42—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect
    • G02B27/4233—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect having a diffractive element [DOE] contributing to a non-imaging application
    • G02B27/4244—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect having a diffractive element [DOE] contributing to a non-imaging application in wavelength selecting devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/435—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material
    • B41J2/447—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material using arrays of radiation sources
    • B41J2/455—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material using arrays of radiation sources using laser arrays, the laser array being smaller than the medium to be recorded
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
    • G02B26/10—Scanning systems
    • G02B26/106—Scanning systems having diffraction gratings as scanning elements, e.g. holographic scanners
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/0025—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for optical correction, e.g. distorsion, aberration
    • G02B27/0031—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for optical correction, e.g. distorsion, aberration for scanning purposes
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/0025—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for optical correction, e.g. distorsion, aberration
    • G02B27/0037—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for optical correction, e.g. distorsion, aberration with diffracting elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/42—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect
    • G02B27/4272—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect having plural diffractive elements positioned sequentially along the optical path
    • G02B27/4277—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect having plural diffractive elements positioned sequentially along the optical path being separated by an air space
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/32—Holograms used as optical elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/42—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect
    • G02B27/4233—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect having a diffractive element [DOE] contributing to a non-imaging application
    • G02B27/425—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect having a diffractive element [DOE] contributing to a non-imaging application in illumination systems

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Laser Beam Printer (AREA)
  • Mechanical Optical Scanning Systems (AREA)

Abstract

본 발명은 레이저 프린터용 홀로그래픽 레이저 스캐닝 유니트에 관한 것으로 레이저 빔을 발생시키는 레이저 다이오드(1)와, 그 레이저 다이오드(1)로 부터 발산하는 레이저 빔을 일정한 각도로 회절시키고 발산되는 레이저 빔의 발산 각도를 줄이는 콜리메이터용 홀로그램(2)과, 상기 콜리메이터용 홀로그램(2)으로 부터 재생되는 레이저 빔을 일정한 각도로 회절, 집속, 그리고 주사하고 한장 이상의 홀로그램으로 형성되는 홀로그램 디스크(3)와, 그 홀로그램 디스크(3)를 회전시키는 모터(4)와, 상기 홀로그램 디스크(3)에 의해 회절, 집속, 주사하는 레이저 빔을 재접속시키는 오목반사경(6)과, 그 오목반사경(6)으로 부터 반사 및 집속되는 레이저 빔을 드럼(8)상에 집속시키고 레이저 빔의 파장 변화에 따라 레이저 빔의 집속위치가 이동하는 것을 보정하는 파장보정용 홀로그램(7)을 순차적으로 배치하여 주사광학계를 구성하고, 상기 홀로글램디스크(3)에 의해 회절, 집속 및 주사되어 반사경(5)에 의해 반사되는 레이저 빔이 오목반사경(6)에 입사되기 전에 입사되는 주사 시작점 검지용 홀로그램(9)과, 슬리트(10)와, 광 검지기(11)를 순차적으로 배치하여 주사시작점 검지용 광학계를 구성한 것으로 되어 있다. 이러한 본 발명은 종래 제작이 힘들고 제작비용이 비싼 회전다면경 및 복합렌즈게를 대량생산이 용이한 홀로그램디스크 및 파장보정용 홀로그램으로 대체함으로써 레이저 프린터의 핵심부품인 레이저 주사장치의 제조원가를 절감할 수 있으며, 또한 홀로그램 디스크를 사용함으로써 종래 보다 고해상도를 얻을 수 있는 효과가 있다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a holographic laser scanning unit for a laser printer, wherein a laser diode (1) for generating a laser beam, a laser beam diverging from the laser diode (1) are diffracted at a constant angle, and divergence of the laser beam is divergent. A hologram disk 3 for reducing the angle, a hologram disk 3 formed by diffraction, focusing, and scanning at a predetermined angle on a laser beam regenerated from the collimator hologram 2, and the hologram disk 3 formed of one or more holograms; A motor 4 for rotating the disk 3, a concave reflector 6 for reconnecting a laser beam to be diffracted, focused and scanned by the hologram disk 3, and a reflection and focus from the concave reflector 6; Focusing the laser beam on the drum 8 and correcting the movement of the focusing position of the laser beam according to the wavelength change of the laser beam The wavelength compensation hologram 7 is sequentially arranged to form a scanning optical system, and a laser beam diffracted, focused and scanned by the hologram disk 3 and reflected by the reflector 5 enters the concave reflector 6. The scanning start point detection hologram 9, the slits 10, and the light detector 11 which are incident before the laser beam is incident are sequentially arranged to form an optical system for detecting the scanning start point. The present invention can reduce the manufacturing cost of the laser scanning device, which is a key part of the laser printer, by replacing the rotating multi-faceted mirror and the compound lens crab with a hologram disk and wavelength correction hologram, which are easy to mass-produce, which are difficult to manufacture and expensive. In addition, the use of a hologram disk has the effect of obtaining a higher resolution than conventionally.

Description

레이저 프린터용 홀로그래픽 레이저 스캐닝 유니트Holographic laser scanning unit for laser printers

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제2도는 레이저 주사광학계의 정면도.2 is a front view of a laser scanning optical system.

제3도는 레이저 주사장치의 측면도.3 is a side view of the laser scanning device.

제4도는 제2도의 A부 확대도.4 is an enlarged view of a portion A of FIG.

제5도는 제2도의 B부 확대도.5 is an enlarged view of a portion B of FIG.

Claims (4)

레이저 빔을 발생시키는 레이저 다이오드(1)와, 그 레이저 다이오드(1)로 부터 발산하는 레이저 빔을 일정한 각도로 회절시키고 발산되는 레이저 빔의 발산각도를 줄이는 콜리메이터용 홀로그램(2)과, 상기 콜리메이터용 홀로그램(2)으로 부터 재생되는 레이저 빔을 일정한 각도로 회절, 집속, 그리고 주사하고 한장 이상의 홀로그램으로 형성되는 홀로그램 디스크(3)와, 그 홀로그램 디스크(3)를 회전시키는 모터(4)와, 상기 홀로그램 디스크(3)에 의해 회절, 집속, 주사하는 레이저 빔을 재집속시키는 오목반사경(6)과, 그 오목반사경(6)으로 부터 반사 및 집속되는 레이저 빔을 드럼(8)상에 집속시키고 레이저 빔의 파장 변화에 따라 레이저 빔의 집속위치가 이동하는 것을 보정하는 파장 보정용 홀로그램 디스크(3)에 의해 회절, 집속 및 주사되어 반사경(5)에 의해 반사되는 검지용 홀로그램(9)과, 슬리트(10)와, 광 검지기(11)를 순차적으로 배치하여 주사시작점 검지용 광학계를 구성함을 특징으로 하는 레이저 프린터용 홀로그래픽 레이저 스캐닝 유니트.A laser diode (1) for generating a laser beam, a collimator hologram (2) for diffracting the laser beam diverging from the laser diode (1) at a constant angle and reducing the divergence angle of the diverging laser beam, and for the collimator A hologram disk (3) formed by diffraction, focusing, and scanning laser beams reproduced from the hologram (2) at a predetermined angle and formed into one or more holograms, a motor (4) for rotating the hologram disk (3), and The concave reflector 6 for refocusing the laser beam to be diffracted, focused and scanned by the hologram disk 3, and the laser beam reflected and focused from the concave reflector 6 are focused on the drum 8 Diffraction, focusing and scanning are performed by the wavelength correction hologram disk 3 which corrects the shifting of the focusing position of the laser beam according to the wavelength change of the beam, And it is reflected for detecting the hologram 9, the sleeve bit 10, a laser scanning unit graphic for laser printers alone is disposed in order for the optical sensor (11), characterized in that the configuration of the optical system for the scanning start point detection. 제1항에 있어서, 상기 콜리메이터용 홀로그램(2)은 레이저 다이오드(1)로 부터 발산하는 레이저 빔의 발산각도 보다 적은 각도를 가지는 발산구면파를 재생하도록 구성된 것을 특징으로 하는 레이저 프린터용 홀로그래픽 레이저 스캐닝 유니트.The holographic laser scanning of a laser printer according to claim 1, wherein the collimator hologram (2) is configured to reproduce diverging spherical waves having an angle less than the divergence angle of the laser beam diverging from the laser diode (1). Unit. 제1항에 있어서, 상기 파장보정용 홀로그램(7)은 파장의 변화에 따른 레이저 빔의 집속위치 이동을 보정하기 위해 일정방향으로만 파우어를 가지는 실린더형 렌즈를 사용하여 제직한 것을 특징으로 하는 레이저 프린터용 홀로그래픽 레이저 스캐닝 유니트.The laser printer according to claim 1, wherein the wavelength correction hologram (7) is woven by using a cylindrical lens having a power only in a predetermined direction in order to correct the shift of the focusing position of the laser beam according to the change of the wavelength. Holographic laser scanning unit. 제1항에 있어서, 상기 홀로그램 디스크(3)을 이루는 홀로그램 소편(3')은 홀로그래픽 플레이트로 부터 LH4만큼 떨어진 거리에서 집속되는 집속구면판 W4를 홀로그래픽 플레이트의 수직선과 각각 θH2,θH3의 각도를 이루며 상기 콜리메이터용 홀로그램(2)은 홀로그래픽 플레이트로 부터 LH1만큼 떨어진 거리에서 발산하는 발산구면파 W1와 LH2만큼 떨어진 거리에서 발산되는 발산구면파 W2가 θH1의 각도를 이루며, 상기 주사 시작점 검지용 홀로그램(9)은 홀로그래픽 플레이트로 부터 LH5만큼 떨어진 거리에서 발산하는 발산구면파 W5와 LH6만큼 떨어진 거리에서 집속되는 집속구면파 W가 θH4의 각도를 이루며, 입사시켜 제작하고, 상기 파장보정용 홀로그램(7)은 θH5의 각도를 가지고 오목반사경(6)과 같은 촛점 길이를 가지는 볼록렌즈에 입사된후 맡큼 떨어진 거리에 집속되는 집속구면파 W7과 YZ평면에서만 파우어를 가지는 촛점길이 LH9를 가지는 실린더형 렌즈를 통과하여 집속되는 집속구면파 W8를 θH5의 각도를 이루게 하여 홀로그램 플레이트에 입사시켜 제작하는 동시에 상기 각 구성부품은 다음식The holographic piece 3 'constituting the hologram disk 3 comprises a converging spherical plate W 4 focused at a distance of L H4 from the holographic plate and θ H2, respectively . at an angle of θ H3 an angle of the collimating hologram (2) is a divergent spherical wave W 2 is emitted at a distance by a divergent spherical wave W 1 and L H2 radiating from a distance of as much as L H1 from the holographic plate θ H1 The scanning starting point detecting hologram 9 has a diverging spherical wave wave W 5 diverging at a distance of L H5 from the holographic plate and a focused spherical wave wave W focused at a distance of LH 6 at an angle θ H4 . was produced, and the wavelength correction hologram (7) is at an angle of θ H5 incident on a convex lens having a focal length of the concave reflectors (6) The matkeum converging spherical wave W 8 is focused through a cylindrical lens having a focal length L H9 having a converging spherical wave W 7 and only pawooeo YZ plane converging at a distance formed an angle of θ H5 to that produced by incident on the holographic plate At the same time, each of the above components ,,을 만족하도록 구성되는 것임을 특징으로 하는 레이저 프린터용 홀로그래픽 레이저 스캐닝 유니트. [단, 상기식에서 L1;레이저 다이오드(1)로 부터 콜리메이터용 홀로그램(2)까지의 거리, L2;콜리메이터용 홀로그램(2)으로 부터 홀로그램 디스크(3)까지의 거리, L3;홀로그램 디스크(3)로부터 반사경(5)까지의 거리, L4;반사경(5)부터 오목반사경(6)까지의 거리, L5;오목반사경(6)부터 파장보정용 홀로그램(7)까지의 거리, L6;파장보정용 홀로그램(7)부터 드럼(8)까지의 거리, L7;반사경(5)부터 주사 시작점 검지용 홀로그램(9)까지의 거리를 표시하고 θ1;콜리메이터용 홀로그램(2)대한 레이저 빔의 입사각도, θ2홀로그램 디스크(3)에 대한 레이저 빔의 입사각도, θ3홀로그램 디스크(3)에 대한 레이저 빔의 회절각도, θ4오목반사경(6)에 대한 레이저 빔의 입사각도, θ5; 오목반사경(6)에 대한 레이저 빔의 반사각도, θ8파장보정용 홀로그램(7)에 대한 레이저 빔의 이비사각도를 표시한 것이다. , , Holographic laser scanning unit for a laser printer, characterized in that configured to satisfy. [Wherein L 1 ; distance from laser diode 1 to collimator hologram 2, L 2 ; distance from collimator hologram 2 to hologram disk 3, L 3 ; hologram disk Distance from (3) to reflector 5, L 4 ; distance from reflector 5 to concave reflector 6, L 5 ; distance from concave reflector 6 to hologram 7 for wavelength correction, L 6 The distance from the wavelength correction hologram (7) to the drum (8), L 7 ; the distance from the reflecting mirror (5) to the scanning starting point detection hologram (9) and θ 1 ; laser beam for the collimator hologram (2) of the incident angle, the incident angle of the laser beam on the θ 2 hologram disk 3 also, θ 3 hologram also the incident angle of the laser beam on the diffraction angle, θ 4 concave reflecting mirror (6) of the laser beam relative to the disc (3), θ 5 ; The reflection angle of the laser beam on the concave mirror (6) also shows an Ibiza angle of the laser beam on the θ 8 wavelength correction hologram (7). ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR92006976A 1992-04-24 1992-04-24 Holographic laser scanning unit in lbp KR960010411B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
KR92006976A KR960010411B1 (en) 1992-04-24 1992-04-24 Holographic laser scanning unit in lbp
GB9308398A GB2266785B (en) 1992-04-24 1993-04-23 Holographic laser scanning unit for laser printer
JP5099699A JPH06102465A (en) 1992-04-24 1993-04-26 Holographic laser scanning device for laser printer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR92006976A KR960010411B1 (en) 1992-04-24 1992-04-24 Holographic laser scanning unit in lbp

Publications (2)

Publication Number Publication Date
KR930021398A true KR930021398A (en) 1993-11-22
KR960010411B1 KR960010411B1 (en) 1996-07-31

Family

ID=19332279

Family Applications (1)

Application Number Title Priority Date Filing Date
KR92006976A KR960010411B1 (en) 1992-04-24 1992-04-24 Holographic laser scanning unit in lbp

Country Status (3)

Country Link
JP (1) JPH06102465A (en)
KR (1) KR960010411B1 (en)
GB (1) GB2266785B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3862446B2 (en) 1998-10-02 2006-12-27 キヤノン株式会社 Imaging lens and image reading apparatus using the same

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8200557A (en) * 1981-02-25 1982-09-16 Benson Inc LASER SCANNER.
US4428643A (en) * 1981-04-08 1984-01-31 Xerox Corporation Optical scanning system with wavelength shift correction
JP2532049B2 (en) * 1983-06-30 1996-09-11 富士通株式会社 Optical beam scanning device
CA1320855C (en) * 1985-07-31 1993-08-03 Shin-Ya Hasegawa Laser beam scanner and its fabricating method
US4826268A (en) * 1987-11-25 1989-05-02 Holotek, Ltd. Hologon scanner system

Also Published As

Publication number Publication date
GB2266785B (en) 1995-11-22
GB9308398D0 (en) 1993-06-09
JPH06102465A (en) 1994-04-15
GB2266785A (en) 1993-11-10
KR960010411B1 (en) 1996-07-31

Similar Documents

Publication Publication Date Title
US4139257A (en) Synchronizing signal generator
US4701005A (en) Light beam combining method and apparatus
US4957336A (en) Laser beam scanner and its fabricating method
US20040257629A1 (en) Lithograph comprising a moving cylindrical lens system
US5805296A (en) Optical scanning apparatus including an image reading section and an image printing section that share a common optical system and a method of printing and reading an image using the common optical system
US4756585A (en) Optical beam scanning system
US5726433A (en) Optical scanning apparatus for generating a helical scanning pattern on an external (cylindrical) surface
US4753503A (en) Laser scanning system
KR930021398A (en) Holographic laser scanning unit for laser printers
KR860001391A (en) Optical finger image processing device and direct reading method
EP0078269A1 (en) Improved diffraction grating scanner with anamorphic correction of scan curvatures
US5253087A (en) Holographic laser beam scanning apparatus
US5245442A (en) Multi-functional laser printer
JPS6137606B2 (en)
JP2740665B2 (en) How to make a holographic fθ lens
JPH0535378Y2 (en)
KR960009793Y1 (en) Optic system
GB2094497A (en) Optical mechanical semiconductor laser scanning system
JP2791449B2 (en) Hologram scanner
JP3206334B2 (en) Optical scanning device
KR100322589B1 (en) Beam Scanning Device Employing Deflection Disc_
FR2564992A1 (en) METHOD AND DEVICE FOR DEFLECTING A BEAM OF LIGHT FOR WRITING AND READING IN MATRIX FORM OF A DOCUMENT
JPH08146335A (en) Light scanner
KR970017279A (en) Optical pick-up device
JPH0772403A (en) Optical scanner

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
G160 Decision to publish patent application
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
LAPS Lapse due to unpaid annual fee