IT1020382B - Sistema di lenti ad ingrandimento variabile - Google Patents

Sistema di lenti ad ingrandimento variabile

Info

Publication number: IT1020382B
Authority: IT; Italy
Prior art keywords: lens system; variable magnification; magnification lens; variable; magnification
Prior art date: 1973-09-04

Application number

IT26845/74A

Other languages

English (en)

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.)

1973-09-04

Filing date

1974-09-02

Publication date

1977-12-20

1974-09-02 Application filed by Xerox Corp filed Critical Xerox Corp

1977-12-20 Application granted granted Critical

1977-12-20 Publication of IT1020382B publication Critical patent/IT1020382B/it

Links

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
- G02B15/142—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 two groups only
- 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
- G02B15/1461—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 the first group being positive

Landscapes

Physics & Mathematics (AREA)
General Physics & Mathematics (AREA)
Optics & Photonics (AREA)
Lenses (AREA)
Variable Magnification In Projection-Type Copying Machines (AREA)
Exposure Or Original Feeding In Electrophotography (AREA)

IT26845/74A 1973-09-04 1974-09-02 Sistema di lenti ad ingrandimento variabile IT1020382B (it)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US393844A US3865470A (en)	1973-09-04	1973-09-04	Variable magnification lens system

Publications (1)

Publication Number	Publication Date
IT1020382B true IT1020382B (it)	1977-12-20

Family

ID=23556470

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
IT26845/74A IT1020382B (it)	1973-09-04	1974-09-02	Sistema di lenti ad ingrandimento variabile

Country Status (13)

Country	Link
US (1)	US3865470A (it)
JP (1)	JPS5056242A (it)
BE (1)	BE819497A (it)
BR (1)	BR7405353A (it)
CA (1)	CA1018807A (it)
DE (1)	DE2441294C2 (it)
ES (1)	ES429431A1 (it)
FR (1)	FR2242694B1 (it)
GB (1)	GB1469585A (it)
IT (1)	IT1020382B (it)
NL (1)	NL7410422A (it)
SE (1)	SE392528B (it)
SU (1)	SU592375A3 (it)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3912374A (en) *	1974-10-17	1975-10-14	Xerox Corp	Six component zoom lens
US4149774A (en) *	1977-11-14	1979-04-17	Fuji Photo Optical Co., Ltd.	Zoom lens system
JPS5590930A (en) *	1978-12-29	1980-07-10	Nippon Kogaku Kk <Nikon>	4-group constitution lens
JPS5768810A (en) *	1980-10-18	1982-04-27	Asahi Optical Co Ltd	Variable nagnification lens system for copying
US4753522A (en) *	1985-06-03	1988-06-28	Ricoh Company, Ltd.	Plastic lens assembly for use in copying machines
JPS6291913A (ja) *	1985-10-18	1987-04-27	興和株式会社	レ−ザ−スポツト光学系
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

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPS5713849B1 (it) *	1969-09-08	1982-03-19
US3687522A (en) *	1971-02-01	1972-08-29	Ilex Optical Co Inc	Variable magnification lens system for finite conjugate distances

1973
- 1973-09-04 US US393844A patent/US3865470A/en not_active Expired - Lifetime
1974
- 1974-06-17 SU SU742032686A patent/SU592375A3/ru active
- 1974-06-28 BR BR5353/74A patent/BR7405353A/pt unknown
- 1974-08-02 NL NL7410422A patent/NL7410422A/xx not_active Application Discontinuation
- 1974-08-06 SE SE7410077A patent/SE392528B/xx unknown
- 1974-08-21 ES ES429431A patent/ES429431A1/es not_active Expired
- 1974-08-28 JP JP49098838A patent/JPS5056242A/ja active Pending
- 1974-08-29 GB GB3787474A patent/GB1469585A/en not_active Expired
- 1974-08-29 DE DE2441294A patent/DE2441294C2/de not_active Expired
- 1974-08-30 CA CA208,265A patent/CA1018807A/en not_active Expired
- 1974-09-02 FR FR7429827A patent/FR2242694B1/fr not_active Expired
- 1974-09-02 IT IT26845/74A patent/IT1020382B/it active
- 1974-09-03 BE BE148176A patent/BE819497A/xx not_active IP Right Cessation

Also Published As

Publication number	Publication date
DE2441294C2 (de)	1982-04-01
ES429431A1 (es)	1977-01-16
SE392528B (sv)	1977-03-28
SE7410077L (it)	1975-03-05
FR2242694A1 (it)	1975-03-28
US3865470A (en)	1975-02-11
CA1018807A (en)	1977-10-11
FR2242694B1 (it)	1976-10-22
GB1469585A (en)	1977-04-06
DE2441294A1 (de)	1975-03-13
BR7405353A (pt)	1976-02-24
SU592375A3 (ru)	1978-02-05
AU7280274A (en)	1976-03-04
JPS5056242A (it)	1975-05-16
BE819497A (fr)	1974-12-31
NL7410422A (it)	1974-10-25

Publication	Publication Date	Title
IT1022107B (it)	1978-03-20	Sistema ottico di scansione
IT1018741B (it)	1977-10-20	Macchina fotografica
IT1015697B (it)	1977-05-20	Sistema ottico di comunicazione
IT1016344B (it)	1977-05-30	Obiettivo a focale variabile per ingrandimento variabile
AT318389B (de)	1974-10-10	Pankratisches Objektiv
CH549812A (de)	1974-05-31	Makro-zoom-objektiv.
BE810182A (fr)	1974-07-25	Camera
AT317576B (de)	1974-09-10	Pankratisches Objektiv
SE423615B (sv)	1982-05-17	Anleggning for malforstoring medelst projektiler
IT1020382B (it)	1977-12-20	Sistema di lenti ad ingrandimento variabile
NL176978C (nl)	1985-07-01	Fototoestel.
IT1011786B (it)	1977-02-10	Sistema ottico
IT1006803B (it)	1976-10-20	Sistema selettore di disegni
NL7409949A (nl)	1975-01-27	Pyroelektrisch camerabuisstelsel.
BR7307003D0 (pt)	1974-08-22	Centrifuga de clarificacao
IT1020339B (it)	1977-12-20	Impianto di irridazione
AT328763B (de)	1976-04-12	Afokales pankratisches linsensystem
SE393215B (sv)	1977-05-02	Kopplinsanordning
NL167030C (nl)	1981-10-15	Zoomlensstelsel.
AT323440B (de)	1975-07-10	Pankratisches objektiv
AT351286B (de)	1979-07-10	Mikroskop-objektiv
IT1024603B (it)	1978-07-20	Sistema ottico ad ingrandimento variabile
NL7411872A (nl)	1975-05-20	Fotografisch stelsel.
AT337001B (de)	1977-06-10	Kinokamera
AT325325B (de)	1975-10-10	Pankratisches kamera-objektiv