DE1772227B1 - Projektor mit selbsttaetiger Fokussiereinrichtung - Google Patents
Projektor mit selbsttaetiger FokussiereinrichtungInfo
- Publication number
- DE1772227B1 DE1772227B1 DE19681772227 DE1772227A DE1772227B1 DE 1772227 B1 DE1772227 B1 DE 1772227B1 DE 19681772227 DE19681772227 DE 19681772227 DE 1772227 A DE1772227 A DE 1772227A DE 1772227 B1 DE1772227 B1 DE 1772227B1
- Authority
- DE
- Germany
- Prior art keywords
- frame
- projector
- optical axis
- image carrier
- plane
- 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
Links
- 230000003287 optical effect Effects 0.000 claims description 28
- 210000000078 claw Anatomy 0.000 claims description 15
- 238000006073 displacement reaction Methods 0.000 claims description 9
- 230000005855 radiation Effects 0.000 claims description 6
- 238000012423 maintenance Methods 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 claims 4
- 230000013011 mating Effects 0.000 claims 2
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 230000001419 dependent effect Effects 0.000 claims 1
- 239000002184 metal Substances 0.000 claims 1
- 238000004804 winding Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 241000158147 Sator Species 0.000 description 1
- 206010000210 abortion Diseases 0.000 description 1
- 231100000176 abortion Toxicity 0.000 description 1
- 210000001520 comb Anatomy 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
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)
- Projection Apparatus (AREA)
- Automatic Focus Adjustment (AREA)
- Transforming Electric Information Into Light Information (AREA)
- Lens Barrels (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US63151667A | 1967-04-17 | 1967-04-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1772227B1 true DE1772227B1 (de) | 1970-07-30 |
Family
ID=24531546
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19681772227 Pending DE1772227B1 (de) | 1967-04-17 | 1968-04-17 | Projektor mit selbsttaetiger Fokussiereinrichtung |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US3536392A (enExample) |
| BE (1) | BE713735A (enExample) |
| DE (1) | DE1772227B1 (enExample) |
| FR (1) | FR1571421A (enExample) |
| GB (1) | GB1224231A (enExample) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3639048A (en) * | 1970-07-23 | 1972-02-01 | Eastman Kodak Co | Automatic ranging and focusing projector |
| DE2040011C3 (de) * | 1970-08-12 | 1975-10-16 | Agfa-Gevaert Ag, 5090 Leverkusen | Automatische Fokussiervorrichtung |
| US4415244A (en) * | 1982-03-22 | 1983-11-15 | Telex Communications, Inc. | Automatic focusing system |
| CN115883798A (zh) * | 2021-09-29 | 2023-03-31 | 中强光电股份有限公司 | 焦距调整方法 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2947215A (en) * | 1957-03-04 | 1960-08-02 | George A Mitchell | Compensating film warpage in projectors |
| US3037423A (en) * | 1957-12-30 | 1962-06-05 | Polaroid Corp | Automatic focusing system |
| US3249001A (en) * | 1963-06-10 | 1966-05-03 | Honeywell Inc | Automatic focusing photographic projector |
| US3264935A (en) * | 1964-01-06 | 1966-08-09 | Robert W Vose | Self-focusing slide projector |
| US3249007A (en) * | 1964-03-26 | 1966-05-03 | Honeywell Inc | Automatic focusing photographic projector |
| US3342102A (en) * | 1965-02-23 | 1967-09-19 | Bell & Howell Co | Image plane position appraisal system for a slide projector |
-
1967
- 1967-04-17 US US631516A patent/US3536392A/en not_active Expired - Lifetime
-
1968
- 1968-04-16 FR FR1571421D patent/FR1571421A/fr not_active Expired
- 1968-04-16 GB GB07942/68A patent/GB1224231A/en not_active Expired
- 1968-04-16 BE BE713735D patent/BE713735A/xx unknown
- 1968-04-17 DE DE19681772227 patent/DE1772227B1/de active Pending
Non-Patent Citations (1)
| Title |
|---|
| None * |
Also Published As
| Publication number | Publication date |
|---|---|
| FR1571421A (enExample) | 1969-06-20 |
| GB1224231A (en) | 1971-03-03 |
| BE713735A (enExample) | 1968-09-16 |
| US3536392A (en) | 1970-10-27 |
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