GB833955A - An objective diaphragm comprising a plurality of pivotally fulcrumed segments deflectable by a slotted control ring - Google Patents
An objective diaphragm comprising a plurality of pivotally fulcrumed segments deflectable by a slotted control ringInfo
- Publication number
- GB833955A GB833955A GB11005/58A GB1100558A GB833955A GB 833955 A GB833955 A GB 833955A GB 11005/58 A GB11005/58 A GB 11005/58A GB 1100558 A GB1100558 A GB 1100558A GB 833955 A GB833955 A GB 833955A
- Authority
- GB
- United Kingdom
- Prior art keywords
- segments
- deflectable
- diaphragm
- control ring
- diaphragm opening
- 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.)
- Expired
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
- G03B9/00—Exposure-making shutters; Diaphragms
- G03B9/08—Shutters
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Diaphragms For Cameras (AREA)
Abstract
833,955. Iris diaphragms. SCHNEIDER, M. C. April 8, 1958 [Aug. 10, 1957], No. 11005/58. Class 97(1) An objective diaphragm consists of a number of pivotally mounted arcuate segments deflectable by a rotatable slotted control ring and is characterized in that for the purpose of fully closing the diaphragm opening at least one of the segments is arranged to be deflectable beyond the diaphragm centre. In the Figures segments a are fulcrumed at b and provided with recesses to provide spaces for guide pins c, which engage cam slots d, cut in a ring e whereby rotation of the latter in the arrowed direction deflects the segments from a fully opened position into that which produces the smallest diaphragm opening. To close fully the diaphragm opening, one or both of the outer segments (e.g., underneath segment a<SP>2</SP>) are arranged to be deflected beyond the dipahrgm centre by providing the relevant cam slot d with a more pronounced inward curvature at d<SP>1</SP>.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE833955X | 1957-08-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB833955A true GB833955A (en) | 1960-05-04 |
Family
ID=6760532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB11005/58A Expired GB833955A (en) | 1957-08-10 | 1958-04-08 | An objective diaphragm comprising a plurality of pivotally fulcrumed segments deflectable by a slotted control ring |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB833955A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4018135A1 (en) * | 1989-06-06 | 1990-12-13 | Dainippon Printing Co Ltd | Emulsion mask defect repair - by applying contoured UV beam of excimer laser |
-
1958
- 1958-04-08 GB GB11005/58A patent/GB833955A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4018135A1 (en) * | 1989-06-06 | 1990-12-13 | Dainippon Printing Co Ltd | Emulsion mask defect repair - by applying contoured UV beam of excimer laser |
| DE4018135B4 (en) * | 1989-06-06 | 2004-07-29 | Dai Nippon Insatsu K.K. | Method and device for repairing defects in emulsion masks |
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