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JPS55151612A - Zoom expander - Google Patents

Zoom expander

Info

Publication number
JPS55151612A
JPS55151612A JP5933679A JP5933679A JPS55151612A JP S55151612 A JPS55151612 A JP S55151612A JP 5933679 A JP5933679 A JP 5933679A JP 5933679 A JP5933679 A JP 5933679A JP S55151612 A JPS55151612 A JP S55151612A
Authority
JP
Japan
Prior art keywords
lens
constitution
positive
groups
group
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
JP5933679A
Other languages
Japanese (ja)
Inventor
Jun Tokumitsu
Kazuo Minoura
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP5933679A priority Critical patent/JPS55151612A/en
Publication of JPS55151612A publication Critical patent/JPS55151612A/en
Pending legal-status Critical Current

Links

Landscapes

  • Lenses (AREA)

Abstract

PURPOSE: To improve the correction of aberration in a simple constitution, by setting one lens group as fixed group and the other two lens groups as movable groups in an afocal lens of negative-positive-negative sequence three-group constitution, and making the second lens group with positive two single lenses.
CONSTITUTION: An afocal zoom expander usable in either He-Ne or semiconductor laser is constituted with three lens groups arranged in the negative-positive-negative sequence from the luminous flux entry side, and the second lens group is made of two single lenses having positive refractive power. An arbitrary one of the three lens groups is fixed, while the other two groups are made movable. The refractive power, principal point interval, and overall length of each lens group are set in the range of specified conditions. In this constitution, a zoom expander of simple constitution, corrected excellently in aberration, of which beam diameter magnification ranges from equal power to about ten times, may be obtained.
COPYRIGHT: (C)1980,JPO&Japio
JP5933679A 1979-05-15 1979-05-15 Zoom expander Pending JPS55151612A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5933679A JPS55151612A (en) 1979-05-15 1979-05-15 Zoom expander

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5933679A JPS55151612A (en) 1979-05-15 1979-05-15 Zoom expander

Publications (1)

Publication Number Publication Date
JPS55151612A true JPS55151612A (en) 1980-11-26

Family

ID=13110371

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5933679A Pending JPS55151612A (en) 1979-05-15 1979-05-15 Zoom expander

Country Status (1)

Country Link
JP (1) JPS55151612A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6068317A (en) * 1983-09-26 1985-04-18 Canon Inc Optical scanner of laser beam printer
JPS6068316A (en) * 1983-09-26 1985-04-18 Canon Inc Optical scanner of laser beam printer
JPS60128320U (en) * 1984-02-03 1985-08-28 萬世工業株式会社 Light beam shaping device
JPS6291913A (en) * 1985-10-18 1987-04-27 興和株式会社 Laser spot optical system
JPS62201416A (en) * 1986-02-04 1987-09-05 Fujitsu Ltd Optical system for laser beam working
WO2005091044A1 (en) * 2004-03-18 2005-09-29 Carl Zeiss Jena Gmbh Afocal zoom system
JP2015524940A (en) * 2012-07-18 2015-08-27 ハンズ レーザー テクノロジー インダストリー グループ カンパニー リミテッド Ultraviolet laser zoom beam expansion system and laser processing equipment
CN112404704A (en) * 2020-11-03 2021-02-26 深圳市韵腾激光科技有限公司 Variable-power laser beam expander and laser processing system
DE102023115827A1 (en) 2022-02-09 2024-01-11 Tamron Co., Ltd. OPTICAL SYSTEM AND OPTICAL COMMUNICATION DEVICE

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS515946A (en) * 1974-07-03 1976-01-19 Nippon Denso Co PARUSUHABAKENSHUTSUKAIRO
JPS5189435A (en) * 1975-02-03 1976-08-05

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS515946A (en) * 1974-07-03 1976-01-19 Nippon Denso Co PARUSUHABAKENSHUTSUKAIRO
JPS5189435A (en) * 1975-02-03 1976-08-05

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6068317A (en) * 1983-09-26 1985-04-18 Canon Inc Optical scanner of laser beam printer
JPS6068316A (en) * 1983-09-26 1985-04-18 Canon Inc Optical scanner of laser beam printer
JPS60128320U (en) * 1984-02-03 1985-08-28 萬世工業株式会社 Light beam shaping device
JPS6291913A (en) * 1985-10-18 1987-04-27 興和株式会社 Laser spot optical system
JPS62201416A (en) * 1986-02-04 1987-09-05 Fujitsu Ltd Optical system for laser beam working
WO2005091044A1 (en) * 2004-03-18 2005-09-29 Carl Zeiss Jena Gmbh Afocal zoom system
JP2015524940A (en) * 2012-07-18 2015-08-27 ハンズ レーザー テクノロジー インダストリー グループ カンパニー リミテッド Ultraviolet laser zoom beam expansion system and laser processing equipment
CN112404704A (en) * 2020-11-03 2021-02-26 深圳市韵腾激光科技有限公司 Variable-power laser beam expander and laser processing system
DE102023115827A1 (en) 2022-02-09 2024-01-11 Tamron Co., Ltd. OPTICAL SYSTEM AND OPTICAL COMMUNICATION DEVICE

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