FR2288323A1 - Dispositif d'eclairage - Google Patents

Dispositif d'eclairage

Info

Publication number: FR2288323A1
Authority: FR; France
Prior art keywords: lighting device; lighting
Prior art date: 1974-10-17
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.): Granted

Application number

FR7531913A

Other languages

English (en)

Other versions

FR2288323B1 (fr

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.)

Xerox Corp

Original Assignee

Xerox Corp

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.)

1974-10-17

Filing date

1975-10-17

Publication date

1976-05-14

1975-10-17 Application filed by Xerox Corp filed Critical Xerox Corp

1976-05-14 Publication of FR2288323A1 publication Critical patent/FR2288323A1/fr

1982-03-26 Application granted granted Critical

1982-03-26 Publication of FR2288323B1 publication Critical patent/FR2288323B1/fr

Status Granted legal-status Critical Current

Classifications

- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/24—Optical objectives specially designed for the purposes specified below for reproducing or copying at short object distances
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/146—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having more than five groups

Landscapes

Physics & Mathematics (AREA)
General Physics & Mathematics (AREA)
Optics & Photonics (AREA)
Lenses (AREA)
Hydrogenated Pyridines (AREA)

FR7531913A 1974-10-17 1975-10-17 Dispositif d'eclairage Granted FR2288323A1 (fr)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US515766A US3912374A (en)	1974-10-17	1974-10-17	Six component zoom lens

Publications (2)

Publication Number	Publication Date
FR2288323A1 true FR2288323A1 (fr)	1976-05-14
FR2288323B1 FR2288323B1 (fr)	1982-03-26

Family

ID=24052650

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
FR7531913A Granted FR2288323A1 (fr)	1974-10-17	1975-10-17	Dispositif d'eclairage

Country Status (7)

Country	Link
US (1)	US3912374A (fr)
JP (1)	JPS5944602B2 (fr)
CA (1)	CA1041336A (fr)
DE (1)	DE2546040C2 (fr)
FR (1)	FR2288323A1 (fr)
GB (1)	GB1519300A (fr)
NL (1)	NL7512031A (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4149774A (en) *	1977-11-14	1979-04-17	Fuji Photo Optical Co., Ltd.	Zoom lens system
JPS5768810A (en) *	1980-10-18	1982-04-27	Asahi Optical Co Ltd	Variable nagnification lens system for copying
US4812021A (en) *	1987-10-07	1989-03-14	Xerox Corporation	Wide angle zoom lens
JP2562636B2 (ja) *	1987-12-25	1996-12-11	富士写真光機株式会社	複写用変倍レンズ系
CN110941086B (zh) *	2019-12-19	2021-12-28	福建福光股份有限公司	一种超短型低畸变微光成像光学系统

Citations (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR2070676A1 (fr) *	1969-09-08	1971-09-17	Ricoh Kk
US3687522A (en) *	1971-02-01	1972-08-29	Ilex Optical Co Inc	Variable magnification lens system for finite conjugate distances
US3865470A (en) *	1973-09-04	1975-02-11	Xerox Corp	Variable magnification lens system

1974
- 1974-10-17 US US515766A patent/US3912374A/en not_active Expired - Lifetime
1975
- 1975-09-25 CA CA236,342A patent/CA1041336A/fr not_active Expired
- 1975-10-03 GB GB40528/75A patent/GB1519300A/en not_active Expired
- 1975-10-13 NL NL7512031A patent/NL7512031A/xx not_active Application Discontinuation
- 1975-10-13 JP JP50123168A patent/JPS5944602B2/ja not_active Expired
- 1975-10-14 DE DE2546040A patent/DE2546040C2/de not_active Expired
- 1975-10-17 FR FR7531913A patent/FR2288323A1/fr active Granted

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR2070676A1 (fr) *	1969-09-08	1971-09-17	Ricoh Kk
US3687522A (en) *	1971-02-01	1972-08-29	Ilex Optical Co Inc	Variable magnification lens system for finite conjugate distances
US3865470A (en) *	1973-09-04	1975-02-11	Xerox Corp	Variable magnification lens system

Also Published As

Publication number	Publication date
JPS5944602B2 (ja)	1984-10-31
GB1519300A (en)	1978-07-26
CA1041336A (fr)	1978-10-31
JPS5165649A (fr)	1976-06-07
US3912374A (en)	1975-10-14
NL7512031A (nl)	1976-04-21
FR2288323B1 (fr)	1982-03-26
DE2546040A1 (de)	1976-04-22
DE2546040C2 (de)	1984-11-22

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Legal Events

Date	Code	Title	Description
1985-08-23	ST	Notification of lapse