Matches 1 - 50 out of 232 1 2 3 4 5 >


Match Document Document Title
5602617 Light metering device with adjustable output  
A light metering device incorporates a light dependent resistor as a light sensing element, a network including a plurality of circuit elements, and a selection mechanism for selectively connecting...
5486914 LCD bargraph motion picture light meter  
In a handheld incident light meter instrument, a custom LCD panel provides both a digital readout and a bar graph array which simulates an analog meter but uses no moving mechanical parts and which...
5012271 Exposure control device  
An exposure control device having exposure control means arranged to vary a charging method thereof according to the selection of a continuous shooting mode or a non-continuous shooting mode. With...
4806964 Method of controlling diaphragm driving in electronic still camera and device therefor  
A method of controlling diaphragm driving in an electronic still camera, wherein a diaphragm is controlled such that an exposure value of a subject on an image forming screen can become a proper...
4739411 Focus warning system for a manually-focused still video camera having an electronic viewfinder  
A manually-focused video camera provides a movie image for an electronic viewfinder and a still image for recording apparatus. A diaphragm in the optical section of the camera determines the...
4669840 Cinematograph camera flicker control and/or indicating device  
A cinematograph camera flicker indicating or control device uses a microprocessor to determine the combinations of camera speed and/or exposure period, or shutter opening, which will be likely to...
4649431 Video camera iris control circuit  
An iris control circuit for a video camera in which only a single drive coil is employed so that the video camera employing the circuit can be more easily miniaturized. A first operational...
4646146 Surveillance camera device with automatically controlled shutter  
A surveillance device consists of a video camera, a shutterless objective, a transmission optic element with an automatically controlled cat's eye shutter, and reflecting mirrors, for projecting an...
4589750 Adapter for connecting single-lens reflex camera lens to video camera  
An adapter for connecting an interchangeable lens, such as a lens which is ordinarily intended for use with a single-lens reflex camera, for which the distance from the rear surface on the lens to...
4564856 Apparatus providing automatic and manual control of setup adjustments for TV cameras  
Apparatus for automatically and/or manually controlling setup of a device such as a color television camera. The system includes a closed loop automatic setup system which provides at least one...
4562476 Automatic diaphragm control device for use IWT CCTV camera  
The present invention relates to an automatic diaphragm control device for use with a CCTV camera in which a video signal applied from the CCTV camera is utilized for diaphragm control, and...
4562477 Automatic diaphragm control device for use with CCTV camera  
The present invention relates to an automatic diaphragm control device for use with a CCTV camera which has recently found many applications.The present invention provides an automatic diaphragm...
4558368 Stop control apparatus for electronic camera  
A stop control apparatus for an electronic camera capable of performing both still picture photographing and motion picture (video) photographing operations. A video exposure control circuit and a...
4460253 Electromagnetically driven diaphragm device  
In the disclosed diaphragm device, an electromagnetic unit is composed of two opposing sets of circularly arranged magnets poled so that opposing surfaces have the same polarity, a rotary member...
4458992 Automatic exposure correction system  
The present invention is an automatic exposure correction system for use in combination with a motion picture camera, which includes a lens barrel, a lens iris-ring and a first toothed pulley which...
4346976 Device for automatic reciprocation of lens angle and aperture of surveillance camera  
A surveillance camera which automatically and continually varies both the lens angle and the aperture is provided. In an area under surveillance where conditions dictating a need for varying the...
4324464 Photographic apparatus with automatic focusing means  
A still camera or motion picture camera wherein the means for monitoring the brightness of a portion of or entire scene transmits signals to an automatic focusing mechanism as well as to the...
4324465 Arrangement for adjusting components of photographic apparatus or the like  
An electric motor which can drive the objective of a slide projector or which can adjust the blade or blades of a diaphragm receives signals from the output of an operational amplifier which...
4300167 Automatic iris control 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...
4288150 Diaphragm control device for cameras  
A diaphragm control device of the type which performs TTL light measurement while stopping-down a diaphragm is constructed to automatically determine the diaphragm aperture by comparing an...
4286857 Exposure correction warning display device  
An automatic exposure control type camera having an exposure correcting device is provided with a warning display device to indicate when the exposure correction operation of the exposure...
4200372 Automatic aperture presetting and exposure control device for camera  
In the disclosed automatic exposure control device for a motion picture camera and so on, a diaphragm driving arrangement drives a diaphragm arrangement. An exposure control arrangement having a...
4200364 Motion picture camera  
A motion picture camera wherein the diaphragm is adjusted in automatic response to signals from two outputs of a digital comparator which receives a first set of signals during each revolution of...
4192588 Control system for controlling the diaphragm in a photographic camera  
The output of a bridge circuit which is unbalanced when the quantity of light falling on a light-sensitive element is less than or more than a predetermined light quantity is applied to a...
4184757 Exposure servo-control device for cameras  
An exposure servo-control device for a camera prevents diaphragm overshoot by a simple damping construction including a mechanical switch or a semiconductor switching element which intermittently...
4183635 Motion-picture camera with long-term exposure  
A motor driving the shutter of a motion-picture camera is intermittently energizable under the control of two time-constant networks triggering respective pulse generators of the one-shot type, the...
4175840 Motion picture camera with multiple exposure  
A transport mechanism for the advance of a motion-picture film in a camera is controlled by a photometric circuit to stop the advance of the film for a predetermined number of shutter revolutions,...
4168115 Golf game projector  
An indoor golf game to display scenes representing perspective views of any one of a plurality of different locations on any one of a plurality of different holes on a golf course. The system also...
4153352 Altered negative-feedback diaphragm control during implementation of image fadeover in a motion-picture camera  
Normally, the negative-feedback diaphragm control system of the motion-picture camera works off a through-the-lens photosensitive element. However, when an image fadeover is to be effected, the...
4143950 Camera  
Motion picture camera, with an objective, in the light path of which, two exposure control devices, on the one hand a diaphragm and on the other hand a shutter, are adjustable by means of a common...
4142785 Exposure control circuit for camera  
Disclosed is a circuit for automatically intermittently sensing adequate ient light conditions and adjusting a cine camera iris for same. The circuit includes an astable multi-vibrator for...
4139282 Device for indicating fading operation  
A device is provided for indicating fading operation in cinecamera. A control circuit receives the scene light indicating voltage and a manually adjusted output voltage for operating a diaphragm...
4124283 Fade-in and fade-out device of an automatic servomechanism of diaphragm in a cinecamera  
A fade-in and fade-out device of an automatic servomechanism for controlling the diaphragm exposure of cinecamera. A differential amplifier having a first input voltage corresponding to the scene...
4118714 Light metering system for a photographic camera  
A light metering system for a photographic camera which may be selectively operated in a through-the-lens (TTL) light metering mode or an outside-the-lens (OTL) light metering mode to improve the...
4116552 Motion-picture camera with automatic diaphragm control compensated for shutter-speed variations  
A shutter mechanism alternates between an exposure phase and a reflex phase. In the reflex phase it reflects incident scene light onto a light-sensitive stage which generates a light-indicating...
4106865 Motion-picture camera programmed for fadeover effects  
The light-sensitive negative-feedback diaphragm control system of the motion-picture camera includes a stepper-motor coupled to the diaphragm, and a control circuit generating stepper-motor drive...
4106864 Motion-picture camera with diaphragm control system having fadeover capability  
The user selects a fadeover duration by selecting the number of pulses in a reference pulse packet registered by a reference counter. During film transport in either direction, a frame-pulse...
4104656 Control means for a diaphragm of a single lens reflex camera  
Electronic means for controlling the aperture of an electromagnetically operated diaphragm of a photographic camera, especially a single lens mirror reflex camera. The diaphragm aperture is set by...
4101910 Automatic diaphragm control system means for preventing energization of the diaphragm adjusting mechanism when the adjusting mechanism is at the limit of its adjusting range  
A diaphragm-adjusting motor varies the setting of an adjustable diaphragm and includes a drive winding and a damping winding. A negative-feedback control circuit generates a scene-light-dependent...
4100558 Automatic-exposure control device for optical instruments  
Herein disclosed is an electromagnetic rotary motion device including permanent magnets establishing a pair of spaced concentric and coextensive circular or semicircular air gaps and a rotor unit...
4094594 Movie-camera with automatic fade-out shutoff  
A movie camera has a film advance motor which can only operate when a relay is closed that is controlled by a transistor. This transistor can be operated by the release switch of the camera and by...
4084893 Exposure control for motion picture cameras  
A control system is described for automatically setting the exposure of a motion picture camera. The circuits shown include, as basic elements, a photoresponsive device, an amplifier connected...
4083630 Fade in and fade out arrangement for a motion picture camera  
The disclosure relates to a fade circuit for a motion picture camera of the type which includes an automatic exposure control. The fade circuit includes a light emitting diode which illuminates the...
4073582 Camera shutter  
A camera shutter has at least one diaphragm leaf which is mounted for angular displacement about a pivot axis. A cam element is mounted for rotation on the output shaft of a motor and is provided...
4072962 Metering device  
A metering device comprises a photoelectric converter circuit for generating a first voltage corresponding to the brightness of a subject to be photographed. The converter circuit includes a...
4066347 Motion picture camera with variable aperture control rate  
The pulse repetition rate of a pulse generator furnishing pulses to a stepmotor which opens and closes the aperture in response to signals indicating that the quantity of light falling on the film...
4059350 Reflex system for cinematographic camera  
A rotating or reciprocating shutter synchronized with the film drive of a cinematographic camera carries or incorporates a light-guiding body of transparent material interposed between the camera...
4057333 Exposure time control device in a cinecamera  
An exposure time control device in a cinecamera comprises a rotatable shutter, an electric motor for driving the shutter, a power source for the motor, and changing means operatively associated...
4052126 Motion picture camera  
A motion picture camera having a film transport mechanism driven by an electric motor having an electronic speed control circuit which may be controlled by the camera operator so as to modify the...
4050795 Motion picture camera operable by a single operating switch  
A single operating switch replaces the main switch connecting the diaphragm control means to the battery and the release switch activating the film transport. All camera circuits are directly...
Matches 1 - 50 out of 232 1 2 3 4 5 >