ZA716108B - Automatic focusing system for projectors and the like - Google Patents
Automatic focusing system for projectors and the likeInfo
- Publication number
- ZA716108B ZA716108B ZA716108A ZA716108A ZA716108B ZA 716108 B ZA716108 B ZA 716108B ZA 716108 A ZA716108 A ZA 716108A ZA 716108 A ZA716108 A ZA 716108A ZA 716108 B ZA716108 B ZA 716108B
- Authority
- ZA
- South Africa
- Prior art keywords
- projectors
- automatic focusing
- focusing system
- automatic
- focusing
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/53—Means for automatic focusing, e.g. to compensate thermal effects
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automatic Focus Adjustment (AREA)
- Focusing (AREA)
- Projection Apparatus (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US7207670A | 1970-09-14 | 1970-09-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
ZA716108B true ZA716108B (en) | 1972-05-31 |
Family
ID=22105406
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ZA716108A ZA716108B (en) | 1970-09-14 | 1971-09-13 | Automatic focusing system for projectors and the like |
Country Status (15)
Country | Link |
---|---|
US (1) | US3672757A (fr) |
JP (1) | JPS5142940B1 (fr) |
AT (1) | AT331534B (fr) |
BE (1) | BE772530A (fr) |
BR (1) | BR7105990D0 (fr) |
CA (1) | CA962099A (fr) |
CH (1) | CH530020A (fr) |
DE (1) | DE2145729C3 (fr) |
ES (1) | ES395045A1 (fr) |
FR (1) | FR2107602A5 (fr) |
GB (1) | GB1357581A (fr) |
IL (1) | IL37636A (fr) |
NL (1) | NL7112544A (fr) |
SE (1) | SE375386B (fr) |
ZA (1) | ZA716108B (fr) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4135794A (en) * | 1975-05-12 | 1979-01-23 | Addressograph-Multigraph Corporation | Photocomposition machine |
US4215922A (en) * | 1978-11-01 | 1980-08-05 | Am International, Inc. | Method for projecting characters at a selected point size in a photocomposition machine |
US4415244A (en) * | 1982-03-22 | 1983-11-15 | Telex Communications, Inc. | Automatic focusing system |
DE3310601C2 (de) * | 1982-03-24 | 1994-02-10 | Canon Kk | Entfernungsmeßvorrichtung |
EP0605053B1 (fr) * | 1992-12-28 | 1997-11-19 | Koninklijke Philips Electronics N.V. | Système de projection d'image ayant une focalisation automatique |
US5400093A (en) * | 1992-12-28 | 1995-03-21 | U.S. Philips Corporation | Image projection system with autofocusing |
US5434632A (en) * | 1993-03-22 | 1995-07-18 | U.S. Philips Corporation | Image projection apparatus with a autofocusing system |
US5609404A (en) * | 1996-04-16 | 1997-03-11 | Eastman Kodak Company | Apparatus and related method for correcting slide warpage in a slide projector |
US6778277B2 (en) * | 2001-05-24 | 2004-08-17 | Eastman Kodak Company | Apparatus and method to measure film motion in a film gate |
-
1970
- 1970-09-14 US US72076A patent/US3672757A/en not_active Expired - Lifetime
-
1971
- 1971-08-27 CA CA121,628A patent/CA962099A/en not_active Expired
- 1971-09-01 IL IL37636A patent/IL37636A/xx unknown
- 1971-09-03 AT AT768971A patent/AT331534B/de not_active IP Right Cessation
- 1971-09-03 GB GB4120571A patent/GB1357581A/en not_active Expired
- 1971-09-07 CH CH1316471A patent/CH530020A/de not_active IP Right Cessation
- 1971-09-08 JP JP46069619A patent/JPS5142940B1/ja active Pending
- 1971-09-13 ZA ZA716108A patent/ZA716108B/xx unknown
- 1971-09-13 BR BR5990/71A patent/BR7105990D0/pt unknown
- 1971-09-13 FR FR7132920A patent/FR2107602A5/fr not_active Expired
- 1971-09-13 DE DE2145729A patent/DE2145729C3/de not_active Expired
- 1971-09-13 NL NL7112544A patent/NL7112544A/xx unknown
- 1971-09-13 ES ES395045A patent/ES395045A1/es not_active Expired
- 1971-09-13 BE BE772530A patent/BE772530A/fr unknown
- 1971-09-14 SE SE7111637A patent/SE375386B/xx unknown
Also Published As
Publication number | Publication date |
---|---|
SE375386B (fr) | 1975-04-14 |
DE2145729A1 (de) | 1972-03-16 |
JPS5142940B1 (fr) | 1976-11-18 |
BR7105990D0 (pt) | 1973-04-12 |
IL37636A (en) | 1974-07-31 |
DE2145729C3 (de) | 1974-09-19 |
AT331534B (de) | 1976-08-25 |
NL7112544A (fr) | 1972-03-16 |
BE772530A (fr) | 1972-01-17 |
ATA768971A (de) | 1975-11-15 |
IL37636A0 (en) | 1971-11-29 |
AU3340671A (en) | 1973-03-22 |
FR2107602A5 (fr) | 1972-05-05 |
ES395045A1 (es) | 1974-11-16 |
DE2145729B2 (de) | 1974-02-14 |
CH530020A (de) | 1972-10-31 |
GB1357581A (en) | 1974-06-26 |
CA962099A (en) | 1975-02-04 |
US3672757A (en) | 1972-06-27 |
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