ES392537A1 - An illumination provision of a plane of a document. (Machine-translation by Google Translate, not legally binding) - Google Patents
An illumination provision of a plane of a document. (Machine-translation by Google Translate, not legally binding)Info
- Publication number
- ES392537A1 ES392537A1 ES392537A ES392537A ES392537A1 ES 392537 A1 ES392537 A1 ES 392537A1 ES 392537 A ES392537 A ES 392537A ES 392537 A ES392537 A ES 392537A ES 392537 A1 ES392537 A1 ES 392537A1
- Authority
- ES
- Spain
- Prior art keywords
- plane
- document
- translation
- machine
- legally binding
- 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
- G03B27/00—Photographic printing apparatus
- G03B27/32—Projection printing apparatus, e.g. enlarger, copying camera
- G03B27/52—Details
- G03B27/54—Lamp housings; Illuminating means
- G03B27/542—Lamp housings; Illuminating means for copying cameras, reflex exposure lighting
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Light Sources And Details Of Projection-Printing Devices (AREA)
- Exposure Or Original Feeding In Electrophotography (AREA)
- Facsimile Scanning Arrangements (AREA)
Abstract
A lighting arrangement of a plane of a document, comprising: lighting means; means for exciting said lighting means; and reflector means for reflecting the light from said lighting means towards said plane of the document and arranged in cooperative configuration with respect to said lighting means, so that said plane of the document is illuminated with a light distribution that is the inverse of the law of the fourth power of the cosine, or eo = e'/ cos4 o, where e' = illumination in the center of the document plane, to establish the illumination on the plane of the image of (see formula) (a constant). (Machine-translation by Google Translate, not legally binding)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US4896470A | 1970-06-23 | 1970-06-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
ES392537A1 true ES392537A1 (en) | 1973-10-01 |
Family
ID=21957376
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES392537A Expired ES392537A1 (en) | 1970-06-23 | 1971-06-22 | An illumination provision of a plane of a document. (Machine-translation by Google Translate, not legally binding) |
Country Status (5)
Country | Link |
---|---|
BE (1) | BE768914A (en) |
DE (1) | DE2129791A1 (en) |
ES (1) | ES392537A1 (en) |
FR (1) | FR2099191A5 (en) |
NL (1) | NL7108238A (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4428914A (en) | 1977-12-23 | 1984-01-31 | Interox | Process for making sodium percarbonate granules |
EP0022175B2 (en) * | 1979-06-21 | 1985-10-09 | International Business Machines Corporation | Electrophotographic copier with variable original document to image size ratio |
-
1971
- 1971-06-15 FR FR7122132A patent/FR2099191A5/fr not_active Expired
- 1971-06-16 DE DE19712129791 patent/DE2129791A1/en active Pending
- 1971-06-16 NL NL7108238A patent/NL7108238A/xx unknown
- 1971-06-22 ES ES392537A patent/ES392537A1/en not_active Expired
- 1971-06-23 BE BE768914A patent/BE768914A/en unknown
Also Published As
Publication number | Publication date |
---|---|
NL7108238A (en) | 1971-12-27 |
FR2099191A5 (en) | 1972-03-10 |
BE768914A (en) | 1971-11-03 |
DE2129791A1 (en) | 1971-12-30 |
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