TV camera system with external cable having built-in...

Television – Camera – system and detail – Optics

Reexamination Certificate

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Details

C348S340000, C348S360000

Reexamination Certificate

active

06489991

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a TV camera system, and more particularly to a TV camera system having separable TV camera and lens units that are combined for use as a TV camera.
2. Description of the Prior Art
In prior art TV camera systems the lens unit that attaches to the TV camera unit is provided with an auto-iris mechanism, which requires an amplifier section to amplify iris drive signals transmitted from the TV camera section to thereby drive the iris mechanism. In this type of TV camera system the lens unit and the camera unit are separate units that are detachably mountable, enabling lenses and camera to be replaced by other lenses and cameras. TV camera units that incorporate an amplifier section and TV camera units that do not incorporate an amplifier section are both available in today's marketplace. This means that it is also necessary to have lens units that incorporate an amplifier section and lens units that do not incorporate an amplifier section, which increases the size of product lineups and decreases production efficiency.
Accordingly, an object of the present invention is to provide a TV camera system that enables the lens unit to be produced more efficiently.
SUMMARY OF THE INVENTION
In accordance with the present invention, the above object is attained by a TV camera system comprising a TV camera unit; a lens unit that is detachably mountable on the TV camera unit and includes an iris mechanism driven by signals from the TV camera unit; and a connecting cable having terminal portions for electrical connection at one end to the TV camera unit and at the other end to the lens unit, and an amplifier section for amplifying signals from the TV camera unit to drive the iris mechanism.
The above object is also attained by a TV camera system comprising a TV camera unit; a lens unit that is detachably mountable on the TV camera unit and includes an iris mechanism driven by signals from the TV camera unit; a first connecting cable having terminal portions for electrical connection at one end to the TV camera unit and at the other end to the lens unit; and a second connecting cable having terminal portions for electrical connection at one end to the TV camera unit and at the other end to the lens unit, and an amplifier section for amplifying signals from the TV camera unit to drive the iris mechanism, wherein said first connecting cable is used to connect the TV camera unit and lens unit when the TV camera unit does incorporate an amplifier section, and said second connecting cable is used to connect the TV camera unit and lens unit when the TV camera does not incorporate an amplifier section.
Each arrangement enables the amplifier section for amplifying the signals from the TV camera unit to drive the iris mechanism to be placed outside the lens unit. This eliminates the need to incorporate an amplifier section in the lens unit, thereby making it possible to produce lens units more efficiently.
Further features of the invention, its nature and various advantages will be more apparent from the accompanying drawings and following detailed description of the invention.


REFERENCES:
patent: 4399466 (1983-08-01), Stephenson
patent: 4862208 (1989-08-01), Yamada et al.
patent: 5087978 (1992-02-01), Hieda
patent: 5343263 (1994-08-01), Takemae et al.
patent: 5877811 (1999-03-01), Iijima et al.
patent: 2000101908 (2000-04-01), None

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