JPS5742061A - Adjuster for quantity of light - Google Patents
Adjuster for quantity of lightInfo
- Publication number
- JPS5742061A JPS5742061A JP55118608A JP11860880A JPS5742061A JP S5742061 A JPS5742061 A JP S5742061A JP 55118608 A JP55118608 A JP 55118608A JP 11860880 A JP11860880 A JP 11860880A JP S5742061 A JPS5742061 A JP S5742061A
- Authority
- JP
- Japan
- Prior art keywords
- variable
- knob
- constitution
- density
- variable resistance
- 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
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
- G03B27/522—Projection optics
- G03B27/525—Projection optics for slit exposure
- G03B27/526—Projection optics for slit exposure in which the projection optics move
- G03B27/527—Projection optics for slit exposure in which the projection optics move as a whole in a translatory movement
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- General Physics & Mathematics (AREA)
- Exposure Or Original Feeding In Electrophotography (AREA)
- Control Of Exposure In Printing And Copying (AREA)
- Control Or Security For Electrophotography (AREA)
Abstract
PURPOSE:To control the quantity of light of a light source, and set copying density approximately linearly with the movement extent of the knob of a density setter by the constitution wherein a fixed resistance is connected partially in parallel to a variable resistance, and a control device is activated by the output voltage of the variable output lead-out terminal provided on the variable resistance side. CONSTITUTION:This is a device of changing the control voltage to a control circuit 2 by the movement of an output lead-out terminal 7 acting cooperatively with a knob thereby controlling the quantity of electricity to be conducted from an electric power source 10 to a light source 1, wherein the terminal 4 at the center M of the resistances of a variable resistance VR1 and the terminal 5 between a variable resitance VR1 and a stationary resistance R3 are connected to parallel to part of the variable resistance VR1. With such constitution, the relation between the movement extent of the knob of a density setting device 3 and the rate of change of copying density is approximately linear.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55118608A JPS5742061A (en) | 1980-08-28 | 1980-08-28 | Adjuster for quantity of light |
US06/294,572 US4467246A (en) | 1980-08-28 | 1981-08-20 | Light quantity controller and input device |
GB8125794A GB2090003B (en) | 1980-08-25 | 1981-08-24 | Electrophotographic copier |
DE19813133619 DE3133619A1 (en) | 1980-08-25 | 1981-08-25 | IMAGE GENERATION DEVICE |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55118608A JPS5742061A (en) | 1980-08-28 | 1980-08-28 | Adjuster for quantity of light |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5742061A true JPS5742061A (en) | 1982-03-09 |
Family
ID=14740763
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP55118608A Pending JPS5742061A (en) | 1980-08-25 | 1980-08-28 | Adjuster for quantity of light |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5742061A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0195070A (en) * | 1987-10-08 | 1989-04-13 | Sanyo Electric Co Ltd | Image forming device |
-
1980
- 1980-08-28 JP JP55118608A patent/JPS5742061A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0195070A (en) * | 1987-10-08 | 1989-04-13 | Sanyo Electric Co Ltd | Image forming device |
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