JPS57192920A - Scanning optical system for compensating plane falling - Google Patents

Scanning optical system for compensating plane falling

Info

Publication number
JPS57192920A
JPS57192920A JP7809081A JP7809081A JPS57192920A JP S57192920 A JPS57192920 A JP S57192920A JP 7809081 A JP7809081 A JP 7809081A JP 7809081 A JP7809081 A JP 7809081A JP S57192920 A JPS57192920 A JP S57192920A
Authority
JP
Japan
Prior art keywords
scanning
plane
lens
optical system
compensating
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP7809081A
Other languages
Japanese (ja)
Inventor
Akira Arimoto
Keiji Kataoka
Susumu Saito
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koki Holdings Co Ltd
Hitachi Ltd
Original Assignee
Hitachi Ltd
Hitachi Koki Co Ltd
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 Hitachi Ltd, Hitachi Koki Co Ltd filed Critical Hitachi Ltd
Priority to JP7809081A priority Critical patent/JPS57192920A/en
Publication of JPS57192920A publication Critical patent/JPS57192920A/en
Pending legal-status Critical Current

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
    • G02B27/0025—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

Abstract

PURPOSE:To remove defocusing due to astigmatism without the influence on the degree of falling compensation by using a cylinder lens constituting a common focusing optical system in a scanning vertical plane together with a scanning lens in addition to the use of a plane falling compensating lens. CONSTITUTION:A cylinder lens 7 arrayed in the side of a light source in comparison with a scanning lens 5 constitutes a common focusing optical system which uses a common focus together with the scanning lens 5 in a scanning vertical plane (sagittal plane) and light from the light source is passed through the scanning optical system in the scanning vertical plane to be made to parallel light flux and then focused in the scanning plane by a plane falling compensating cylinder lens 6. Since the cylinder lens has no inlfuence on a scanning plane (meridional plane), the light can be focused on a meridional plane focus, namely, the scanning plane of the scanning optical system. An astigmatism compensating lens causes the same effect on a deflector independently of the position in the side of the light source or the scanning lens 5.
JP7809081A 1981-05-25 1981-05-25 Scanning optical system for compensating plane falling Pending JPS57192920A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7809081A JPS57192920A (en) 1981-05-25 1981-05-25 Scanning optical system for compensating plane falling

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7809081A JPS57192920A (en) 1981-05-25 1981-05-25 Scanning optical system for compensating plane falling

Publications (1)

Publication Number Publication Date
JPS57192920A true JPS57192920A (en) 1982-11-27

Family

ID=13652145

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7809081A Pending JPS57192920A (en) 1981-05-25 1981-05-25 Scanning optical system for compensating plane falling

Country Status (1)

Country Link
JP (1) JPS57192920A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4957336A (en) * 1985-07-31 1990-09-18 Fujitsu Limited Laser beam scanner and its fabricating method
US5955721A (en) * 1994-08-17 1999-09-21 Metrologic Instruments, Inc. Holographic scanning system with high-resolution 2-D a scanning field steerable within 3-D scanning volume
US5975419A (en) * 1994-08-17 1999-11-02 Metrologic Instruments, Inc. Holographic laser scanner generating a high-resolution 2-D raster scanning pattern using a holographic scanning disc
US6003772A (en) * 1994-08-17 1999-12-21 Metrologic Instruments, Inc. Holographic laser scanning system employing holographic scanning disc having dual-fringe contrast regions for optimized laser beam scanning and light collection operations
US6006993A (en) * 1994-08-17 1999-12-28 Metrologic Instruments, Inc. Holographic laser scanning system for carrying out laser beam scanning operations with improved scan angle multiplication efficiency and carrying out light collection operations with improved light collection efficiency
US6085978A (en) * 1994-08-17 2000-07-11 Metrologic Instruments, Inc. Holographic laser scanners of modular construction and method and apparatus for designing and manufacturing the same
US6158659A (en) * 1994-08-17 2000-12-12 Metrologic Instruments, Inc. Holographic laser scanning system having multiple laser scanning stations for producing a 3-D scanning volume substantially free of spatially and temporally coincident scanning planes
US6547144B1 (en) 1994-08-17 2003-04-15 Metrologic Instruments, Inc. Holographic laser scanning system for carrying out light collection operations with improved light collection efficiency
US6619550B1 (en) 1995-12-18 2003-09-16 Metrologic Instruments, Inc. Automated tunnel-type laser scanning system employing corner-projected orthogonal laser scanning patterns for enhanced reading of ladder and picket fence oriented bar codes on packages moving therethrough

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4957336A (en) * 1985-07-31 1990-09-18 Fujitsu Limited Laser beam scanner and its fabricating method
US6328215B1 (en) 1994-08-17 2001-12-11 Metrologic Instruments, Inc. Method and system for automatically identifying packages during package sortation operations manually carried out by a human operator
US7152796B2 (en) 1994-08-17 2006-12-26 Metrologic Instruments, Inc. Bar code symbol scanning system having multiple scanning stations for producing a 3-D scanning volume free of substantially and temporally coincident scanning planes
US6290132B1 (en) 1994-08-17 2001-09-18 Metrologic Instruments, Inc. Holographic-based bar code symbol position detection system for producing bar code symbol position data specifying the position of a detected bar code symbol within a 3-D scanning volume above a conveyor belt structure
US6003772A (en) * 1994-08-17 1999-12-21 Metrologic Instruments, Inc. Holographic laser scanning system employing holographic scanning disc having dual-fringe contrast regions for optimized laser beam scanning and light collection operations
US6006993A (en) * 1994-08-17 1999-12-28 Metrologic Instruments, Inc. Holographic laser scanning system for carrying out laser beam scanning operations with improved scan angle multiplication efficiency and carrying out light collection operations with improved light collection efficiency
US6024282A (en) * 1994-08-17 2000-02-15 Metrologic Instruments, Inc. Holographic laser scanning system for omni-directional laser scanning of bar code symbols with 3-D scanning volume having a large depth of field
US6062479A (en) * 1994-08-17 2000-05-16 Metrologic Instruments, Inc. Holographic laser scanning system and process and apparatus and methods for designing and constructing the same
US6073846A (en) * 1994-08-17 2000-06-13 Metrologic Instruments, Inc. Holographic laser scanning system and process and apparatus and method
US6085980A (en) * 1994-08-17 2000-07-11 Metrologic Instruments, Inc. Holographic laser scanning system for producing an omni-directional scanning pattern within a 3-D scanning volume
US6085978A (en) * 1994-08-17 2000-07-11 Metrologic Instruments, Inc. Holographic laser scanners of modular construction and method and apparatus for designing and manufacturing the same
US6158659A (en) * 1994-08-17 2000-12-12 Metrologic Instruments, Inc. Holographic laser scanning system having multiple laser scanning stations for producing a 3-D scanning volume substantially free of spatially and temporally coincident scanning planes
US6199759B1 (en) * 1994-08-17 2001-03-13 Metrologic Instruments, Inc. Bar code symbol scanning system having a holographic laser scanning disc utilizing maximum light collection surface area thereof and having scanning facets with optimized light collection efficiency
US5984185A (en) * 1994-08-17 1999-11-16 Metrologic Instruments, Inc. Laser scanning system employing parabolic light collection surfaces having optical axes disposed off the Bragg angle of the holographic optical elements of the holographic scanning disc thereof
US5975419A (en) * 1994-08-17 1999-11-02 Metrologic Instruments, Inc. Holographic laser scanner generating a high-resolution 2-D raster scanning pattern using a holographic scanning disc
US6547144B1 (en) 1994-08-17 2003-04-15 Metrologic Instruments, Inc. Holographic laser scanning system for carrying out light collection operations with improved light collection efficiency
US6415980B1 (en) 1994-08-17 2002-07-09 Metrologic Instruments, Inc. Holographic laser scanning system for laser scanning of bar code symbols within 3-D scanning volume having a large depth field
US6422466B1 (en) 1994-08-17 2002-07-23 Metrologic Instruments, Inc. Method of and system for automatically identifying packages during package transport operations carried out by a human operator walking through the doorway of a storage container
US6439462B1 (en) 1994-08-17 2002-08-27 Metrologic Instruments, Inc. Conveyor-belt mounted bar code symbol reading system employing a steerable bar code symbol scanner to automatically scan bar code symbols detected by a holographic-based bar code position detector
US6457646B1 (en) 1994-08-17 2002-10-01 Metrologic Instruments, Inc. Laser code symbol scanning system with high-resolution 2-D scanning field steerable with 3-D scanning volume
US6474556B2 (en) 1994-08-17 2002-11-05 Metrologic Instruments, Inc. Laser scanning system mounted over a conveyor belt along which packages bearing bar code symbols are transported and scanned
US6530522B1 (en) 1994-08-17 2003-03-11 Metrologic Instruments, Inc. Holographic laser scanning system having multiple laser scanning stations for producing a 3-D scanning volume substantially free of spatially and temporally coincident scanning planes
US6375074B1 (en) 1994-08-17 2002-04-23 Metrologic Instruments, Inc. Holographic laser scanner for producing a highly-defined three-dimensional scanning volume having multiple focal regions within which the laser scanlines are spatially confined
US6561424B1 (en) 1994-08-17 2003-05-13 Metrologic Instruments, Inc. Method of and system for automatically identifying packages during package transport operations carried out by a human operator walking through the doorway of a storage warehouse
US5955721A (en) * 1994-08-17 1999-09-21 Metrologic Instruments, Inc. Holographic scanning system with high-resolution 2-D a scanning field steerable within 3-D scanning volume
US6840449B2 (en) 1994-08-17 2005-01-11 Metrologic Instruments, Inc. Laser scanning system having multiple laser scanning stations for producing a 3-D scanning volume substantially free of spatially and temporally coincident scanning planes
US6953153B2 (en) 1994-08-17 2005-10-11 Metrologic Instruments, Inc. Compact holographic laser scanner having minimized housing dimensions determined by scanning disc and beam folding mirror parameters
US6619550B1 (en) 1995-12-18 2003-09-16 Metrologic Instruments, Inc. Automated tunnel-type laser scanning system employing corner-projected orthogonal laser scanning patterns for enhanced reading of ladder and picket fence oriented bar codes on packages moving therethrough

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