IMAGE PICKUP DEVICE

PURPOSE: To facilitate up/down control of a zoom lens by selecting any of at least three resistors connected in series between a point of a power supply voltage and a point of a ground potential. CONSTITUTION: Operation switches 20a, 20b to set a zoom lens 1 to have a prescribed magnification are pr...

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Bibliographic Details
Main Author MATSUZAKI YUKINORI
Format Patent
LanguageEnglish
Published 11.10.1996
Edition6
Subjects
ACCESSORIES THEREFOR
APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES
APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM
CINEMATOGRAPHY
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
ELECTROGRAPHY
HOLOGRAPHY
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHOTOGRAPHY
PHYSICS
PICTORIAL COMMUNICATION, e.g. TELEVISION
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Summary:PURPOSE: To facilitate up/down control of a zoom lens by selecting any of at least three resistors connected in series between a point of a power supply voltage and a point of a ground potential. CONSTITUTION: Operation switches 20a, 20b to set a zoom lens 1 to have a prescribed magnification are provided in a zoom camera unit 4. The operation switches 20a, 20b are connected to both ends of resistance division of a power supply wire from a control unit 18 and its midpoint connects to an A/D converter circuit 15 of a section 9 of a control unit 18. The zoom camera unit 4 electrically connects to the control unit 18 by a cable. When the operation switch 20a is depressed, a resistor 20d is short-circuited and the mode is set to the zoom-up mode and the magnification of the zoom lens 1 is increased. When the operation switch 20b is depressed, a resistor 20e is short-circuited and the mode is set to the zoom-down mode and the magnification of the zoom lens 1 is decreased.
Bibliography:Application Number: JP19950065368