Matches 1 - 25 out of 25
Match Document Document Title
6968058 Digital evidential camera system for generating alteration detection data using built-in encryption key  
A digital evidential camera system is for detecting the alteration of image data obtained by photographing an object. The system comprises the camera and an alteration detection unit. The camera...
5742852 Photometry system  
A photometric system is provided in which the value is obtained when the center-weighted photometric value and the like are determined from a plurality of separate photometric outputs is the same...
5376992 Photocurrent charge type exposure measuring apparatus  
An output current of a photodiode is charged in a capacitor, and the voltage change of the capacitor is monitored by a plurality of comparators. The time required for the capacitor voltage to reach...
5170205 Eliminating camera-shake  
An exposure control device of a camera by which an appropriate camera-shake limit shutter speed T vf can be obtained in accordance with a focal length f of a photographing lens, and by which an...
5097262 Analog-to-digital converter for camera  
An analog-to-digital converter for a camera has a reference signal generating element, a measurement signal generating element, and pulse output means for generating pulses of pule durations...
5040070 Solid-state image sensing apparatus for electronically controlling exposure by employing CCD as solid-state image sensing device and method of driving such CCD  
In solid-state image sensing apparatus including a frame transfer type CCD 10 as a solid-state image sensing device, charges stored in a light receiving portion 11 are once discharged externally in...
5006880 Programmable shutter  
A programmable shutter of the type wherein a shutter blade is opened and closed by means of a stepping motor. The motor is rotated in a forward direction by drive pulses of a predetermined fixed...
4710014 Control circuit for a programming shutter  
A control circuit for a programming shutter includes a light receiving element which is always exposed to light from a subject to be photographed and a logarithmic compression device which...
4586029 Blur detecting device  
A blur detecting device comprises a plurality of photo-electric converter elements which are arranged in different positions to receive light from an object and to convert quantities of light...
4500192 Automatic exposure controller for a camera  
An automatic exposure controller for a camera comprises an analog-to-digital converter which converts a logarithmically compressed voltage corresponding to the brightness of an object being...
4479707 Exposure time reproducing device  
In the disclosed exposure time reproducing device, a digitally suppressed exposure time datum is expanded by shifting the decimal part of the datum according to the contents of its integral part....
4465354 System and method for calculating a light information value  
A system disclosed is for calculating a light information value, such as an f/stop number, which is determined by a number of light sources such as strobes. The system calculates an optimum f/stop...
4408852 Automatic exposure controller for camera of TTL direct photometry type  
Automatic exposure controller for camera of TTL direct photometry type forms a difference between a photometric value which is obtained by determining a fixed reflection from only a first blind...
4324462 Exposure time control circuit for camera  
A circuit for controlling an exposure time of a camera which operates depending on whether or not an electronic flash used with the camera is charged and ready for operation. An arithmetic...
4306785 Camera exposure time control circuit  
A combined manual and automatic exposure time control circuit for a camera in which automatic exposure data produced through photometric techniques and manual exposure data set manually are coupled...
4255027 Exposure control device for photographic camera  
In a photographic camera provided with an electric shutter speed control circuit including a light measuring circuit in which scene brightness information is log-compressed and memorized by a...
4229088 Exposure time controlling system  
An exposure time controlling system includes a circuit for producing an APEX shutter speed signal which is applied to a first discriminator for briefly classifying the APEX shutter speed signal...
4184151 Circuit for digitally processing exposure information  
A circuit system designed to realize fully digitalized automatic exposure controls is provided in which the read-in brightness information is logarithmically compressed directly into a digital...
4117499 Photographic camera with automatic exposure control  
Electronic circuitry for setting or controlling either one of two exposure value factors of a photographic camera, namely, the exposure time (shutter speed) and the diaphragm aperture. The...
4112439 Digital display circuit for a photographic exposure meter  
An analog-to-digital converter circuit for a photographic exposure meter includes a plurality of parallel connected transistors 51, 54, 57 and 60 whose bases are connected to the logarithmic output...
4054887 Exposure control device for photographic cameras  
Exposure control device for a photographic camera wherein, in a part of the exposure control device, electronic means are provided in order to form, from the luminous density of an object, the film...
4032932 Automatic shutter controls for cameras  
A camera is provided with a photo-responsive pulse generator for generating pulses the number of which is determined by the logarithmically converted light intensity at an object which is to be...
3995284 Automatic exposure time control circuit  
An automatic exposure time control circuit for use with a camera having a shutter. A light measuring circuit for measuring the scene brightness passing through the camera lens produces an electric...
3882510 Oscillation systems for control of camera shutters  
An electronic control for a camera shutter of the frequency conversion type including an oscillation circuit for providing a series of pulse signals whose frequency is a function of the light...
3879118 Exposure control apparatus  
A photographic exposure control apparatus for a single lens reflex camera having an electrically timed shutter. The apparatus is characterized in the use of a variable frequency pulse-forming...
Matches 1 - 25 out of 25