FR2343268B1 - - Google Patents
Info
- Publication number
- FR2343268B1 FR2343268B1 FR7705943A FR7705943A FR2343268B1 FR 2343268 B1 FR2343268 B1 FR 2343268B1 FR 7705943 A FR7705943 A FR 7705943A FR 7705943 A FR7705943 A FR 7705943A FR 2343268 B1 FR2343268 B1 FR 2343268B1
- Authority
- FR
- France
- 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.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B17/00—Systems with reflecting surfaces, with or without refracting elements
- G02B17/08—Catadioptric systems
- G02B17/0896—Catadioptric systems with variable magnification or multiple imaging planes, including multispectral systems
-
- 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
- G02B15/1421—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 the first group being positive
-
- 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
- G02B17/00—Systems with reflecting surfaces, with or without refracting elements
- G02B17/008—Systems specially adapted to form image relays or chained systems
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B17/00—Systems with reflecting surfaces, with or without refracting elements
- G02B17/08—Catadioptric systems
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Lenses (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/663,397 US4061419A (en) | 1976-03-03 | 1976-03-03 | Variable magnification lens system |
| US05/663,394 US4056308A (en) | 1976-03-03 | 1976-03-03 | Variable focal length reflector lens system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2343268A1 FR2343268A1 (fr) | 1977-09-30 |
| FR2343268B1 true FR2343268B1 (es) | 1980-09-12 |
Family
ID=27098728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7705943A Granted FR2343268A1 (fr) | 1976-03-03 | 1977-03-01 | Objectif a distance focale variable |
Country Status (5)
| Country | Link |
|---|---|
| CH (1) | CH611717A5 (es) |
| DE (1) | DE2703914C2 (es) |
| FR (1) | FR2343268A1 (es) |
| GB (1) | GB1553054A (es) |
| NL (1) | NL7702191A (es) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH621414A5 (es) * | 1977-11-15 | 1981-01-30 | Gretag Ag |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3537774A (en) * | 1969-04-02 | 1970-11-03 | Eastman Kodak Co | Photographic objective of the gauss type having two airspaced negative doublets |
| BE755985A (fr) * | 1969-09-10 | 1971-03-10 | Xerox Corp | Systeme de lentilles symetriques de reproduction de type dagor,separe |
| US3687522A (en) * | 1971-02-01 | 1972-08-29 | Ilex Optical Co Inc | Variable magnification lens system for finite conjugate distances |
| US3659922A (en) * | 1971-02-25 | 1972-05-02 | Xerox Corp | Symmetrical half-lens optical system |
| JPS5110091B2 (es) * | 1972-06-20 | 1976-04-01 | ||
| US3865471A (en) * | 1974-01-02 | 1975-02-11 | Xerox Corp | Lens system for photoelectrophoretic copying machine |
-
1977
- 1977-01-31 DE DE2703914A patent/DE2703914C2/de not_active Expired
- 1977-02-17 CH CH201077A patent/CH611717A5/xx not_active IP Right Cessation
- 1977-03-01 NL NL7702191A patent/NL7702191A/xx not_active Application Discontinuation
- 1977-03-01 FR FR7705943A patent/FR2343268A1/fr active Granted
- 1977-03-02 GB GB8787/77A patent/GB1553054A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CH611717A5 (en) | 1979-06-15 |
| FR2343268A1 (fr) | 1977-09-30 |
| DE2703914A1 (de) | 1977-09-08 |
| NL7702191A (nl) | 1977-09-06 |
| GB1553054A (en) | 1979-09-19 |
| DE2703914C2 (de) | 1986-06-26 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |