Circon Corporation

Frederick A Miller

Frank D D'Amelio

Erhan H Gunday

Edward A Wooff, Jr

Abraham Kotlyar

Paul Hartloff

A video signal compensator and method for compensating for differential picture brightness of an optical image due to uneven illumination is shown. The video signal compensator includes a device for generating a compensating signal substantially representing at least one parameter of a compensating waveform required to produce a video signal representing an optical image having a substantially uniform brightness. An adder operatively coupled to the compensating signal generating device and a video signal adds the compensating signal and the video signal to produce a compensating video signal used as an input to a video signal processor adjusting its gain both vertically and horizontally compensated by increasing the gain of the video signal representing that part of the optical image which is less bright than a reference and reducing the gain of the video signal representing that part of the optical image which is brighter than a reference compensating the video signal to represent an optical image having a substantially uniform brightness. The compensating signal can be generated by either an analog signal generating device or a digital signal processing device.

Video signal compensator for compensating differential picture

A miniature video camera means adapted for use in a video system having a video imaging means for producing an electrical video signal, a housing means defining an opening therethrough to permit an optical image from an optical device to be focused on an imaging surface of the video imaging means and circuit means formed into a geometric shape which defines a passageway of a geometrical dimension to permit the optical image to pass therethrough and wherein the circuit means is located in the housing between the housing opening and the imaging surface of the video imaging means and wherein the circuit means includes preamplifying means operatively connected to the video imaging means for receiving and amplifying the electrical video signals with a predetermined gain and driving means operatively connected to the preamplifying means and to an output circuit to drive the output circuit with an amplified electrical video signal is shown.

Miniature video camera means for video system

An automatic iris control system adapted to be connected between a video camera and optical input device which produces an optical image from a light directed upon and reflected from a subject wherein the optical image is directed onto the surface of an electronic imaging tube in the video camera and the optical image has a wide variation of reflected light due to variations in distance of the subject from the light source and wherein the automatic iris control system has an adjustable iris and drive motor located between the surface of the electronic imaging tube and optical input device for dynamically varying the intensity of the optical image applied to the electronic imaging tube of the video camera, a light intensity programming circuit for establishing a desired light intensity level on the surface of the electronic imaging tube of the video camera, and an automatic iris control circuit having a low gain amplifier, a weighted peak response detector, a comparator, a circuit for controlling current to the iris drive motor and a circuit for providing a feedback signal representing the direction in which the iris must be adjusted by the motor to control the light intensity on the surface of the electronic imaging tube of the video camera is shown.

Automatic iris control system

A vidicon camera adapted for use in a direct wire television system and having a vidicon tube, a metal housing having means defining an opening therethrough to permit an optical image to be focused on the imaging surface of the vidicon tube, a first printed circuit board having an aperture of sufficient size to permit the optical image to pass therethrough positioned in the housing between the housing opening and the imaging surface of the vidicon tube wherein the first printed circuit board including preamplifier means electrically connected to the vidicon tube for receiving composite video signals and producing amplified in-phase adapted composite video signals, a second printed circuit board positioned between the end of the vidicon tube opposite the end having the imaging surface and the housing, wherein the second printed circuit board includes amplifier means for amplifying in-phase the composite video signals with a predetermined gain, emitter follower amplifying means electrically connected to the amplifier means and adapted to drive a direct wire with the amplified composite video signal and conductor means electrically connected between the vidicon tube, the first and second printed circuit boards and a remote television system is shown.

Growing community of inventors

Santa Barbara, CA, United States of America

Frederick A Miller