CCTV lens and method of correcting CCTV lens
AssigneeCBC Co., Ltd.
InventorsRikki Kaku, Takayuki Tojima
Life of this patent
Estimating the term…
Abstract
A substrate of a control unit is composed of a flexible circuit, a microcomputer is provided on the flexible circuit, and a control unit is provided so as to extend along an outer edge of a lens body. Pulse motors are used for zoom adjustment and focus adjustment, and a drive voltage is applied directly from the flexible circuit to an input terminal of each of the pulse motors. The microcomputer of the control unit is connected to an external control device via a serial communication line, and configured to control the respective pulse motors of the CCTV lens on the basis of a command from the external control device.
Claims15
A CCTV lens for a CCTV camera, the CCTV lens comprising:
- a lens body, the lens body including:
- a zoom adjustment assembly including a zoom lens, a zoom retaining frame, and a zoom rotation ring, the zoom adjustment assembly coupling the zoom rotation ring and a zoom gear unit together, and the zoom adjustment assembly varying a magnification of the lens body by moving the zoom lens along an optical axis by a drive force from a first pulse motor integrated in the zoom gear unit;
- and
- a focus adjustment assembly including a ring-shaped focus rotation ring, a focus lens unit and a focus retaining frame, the focus adjustment assembly coupling the focus rotation ring and a focus gear unit together, and the focus adjustment assembly adjusting a focus of the lens body by moving the focus lens unit along the optical axis by a drive force from a second pulse motor integrated in the focus gear unit;
- an iris adjuster that is fixedly interposed between the zoom adjustment assembly and the focus adjustment assembly of the lens body, the iris adjuster varying an amount of light passing through the lens body by adjusting an opening amount of a linearly slidable diaphragm by drive-controlling a third pulse motor;
- and
- a control unit, the control unit including:
- an elongated flexible substrate;
- an input/output terminal that is provided at a first longitudinal end of the elongated flexible substrate, the input/output terminal receiving external power and receiving and sending communication signals;
- a microcomputer, including a processor and a memory, that is provided on the elongated flexible substrate;
- and
- a motor driver circuit that is provided on the elongated flexible substrate and that provides a drive voltage to each of the first, second, and third use motors;
- wherein the elongated flexible substrate of the control unit is bent are bent at areas other than where the microcomputer and the motor driver circuit are provided, and the control unit is mounted on a periphery of an outer edge of the lens body.
Dependencies are inferred from the claim text.