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| Number | Title | Issue Date |
| 7359632 | Flash apparatus, image capture apparatus having a flash apparatus, and method of controlling a flash apparatus A flash apparatus or an image capture apparatus includes a charging unit, configured to boost a voltage of an electric source and a control unit, configured to calculate the sum of the light emission amount within a predetermined period of time. The control unit red... | 04/15/2008 |
| 7190991 | Multi-mode internal imaging The invention described herein provides systems and methods for multi-modal imaging with light and a second form of imaging. Light imaging involves the capture of low intensity light from a light-emitting object. A camera obtains a two-dimensional spatial distributi... | 03/13/2007 |
| 7164118 | Method and system for obstacle detection A method and system for detecting the presence of an object or the distance between the system and an object supports the provision of rapid and reliable obstacle detection. A transmitter emits generally linear beams of electromagnetic radiation with a transmitted r... | 01/16/2007 |
| 7126636 | Low-noise CMOS active pixel A low-noise CMOS active pixel for image sensors comprises a photosensitive element (PD), a feedback capacitive element (CF) with a capacitance CF, and four transistors, namely a first transistor (M1), two reset transistors (M3, M4) an... | 10/24/2006 |
| 7075578 | Digital camera with flash emission control A plurality of photosensors are provided as light measuring elements at respectively different positions within a space between an optical unit and an image sensor so as to be outside the optical path of the direct light from a photographic subject entering through ... | 07/11/2006 |
| 6919919 | Light calibration device for use in low level light imaging systems The invention describes systems and methods for calibrating a low-level light imaging system. Techniques described herein employ a light calibration device that is placed within a low level light imaging box to calibrate the system and its constituent components suc... | 07/19/2005 |
| 6710321 | Display image quality measuring system The display image quality measuring system includes a image pickup device with a photographing condition, a gradation characteristic and a dark level being known, a control device for instructing a display to display an adjustment pattern and a measurement pattern a... | 03/23/2004 |
| 6642503 | Time domain sensing technique and system architecture for image sensor A photodiode sensor (25) has a photodiode (30) with an associated capacitance (34), which may be a parasitic capacitance of the photodiode (30). A switch (36) is provided for charging the capacitance (34) to a predetermined reset voltage (Vreset | 11/04/2003 |
| 6567160 | Light measuring apparatus and light measuring method A light measuring apparatus is provided with a photoelectric conversion element for converting a light energy to an electrical signal, a calculation circuit for calculating a measurement value based on the electrical signal, a memory for storing a correct... | 05/20/2003 |
| 6529281 | Position sensitive detectors and distance measuring apparatus using them In an apparatus a photosensitve surface of PSD is provided with a conductive trunk region extending in a base line direction and a plurality of conductive branch regions arranged in the base line direction and each connected to the trunk region, and each ... | 03/04/2003 |
| 6414295 | Image-sensing device and signal processing method in an image-sensing device In an image-sensing device, the output of an area sensor 1 obtained as an electric signal logarithmically proportional to the amount of incident light is converted by a conversion circuit 3 into an electric signal linearly proportional to the amount of in... | 07/02/2002 |
| 6180936 | Photoreceptor arrangement for receiving light beams having coupling elements The photoreceptor arrangement has at least two photoreceptors (P) with which light rays are registered and converted into electrical signals. The photoreceptors (P) are coupled to one another, whereby the couplings (K) of the photoreceptors (P) are coupli... | 01/30/2001 |
| 6058270 | Photometric device and camera having the photometric device A low cost, low power photometric circuit suitable for use in a low end camera includes a first counter for counting successive pulses produced by a first oscillator having a substantially constant oscillation frequency and a second counter for counting s... | 05/02/2000 |
| 6029014 | Light measuring apparatus and camera using the light measuring apparatus A light measuring apparatus comprises an oscillation circuit, a first delaying circuit for delaying an output waveform of the oscillation circuit in accordance with a peripheral brightness, a second delaying circuit for delaying an output waveform of the ... | 02/22/2000 |
| 5969338 | Light-received position detecting circuit and distance detecting apparatus using the same A light-received position detecting circuit includes a light receiving portion 10 formed by plural photodiodes arranged side by side for detecting light to generate a photoelectric current, and a resistor group RR formed by plural resistors RR1 to RRn-1 c... | 10/19/1999 |
| 5838425 | Exposure control for the photographic recording of a microscope image An exposure control system for the photographic recording of a microscope image comprises a two dimensional photographic receiver arrangement for detecting the image brightness of the microscope image. The receiver arrangement is a component part of a cam... | 11/17/1998 |
| 5777728 | Light meter A light meter comprising: a light sensitive charge storage array having at least one charge storage cell, and reading circuit means connected to said array for generating a light reading from charge stored in said array, said light reading being indicativ... | 07/07/1998 |
| 5705807 | Photo detecting apparatus for detecting reflected light from an object and excluding an external light componet from the reflected light There is provided a photosensor having a photoelectric converter for converting incident light into a photoelectric current, and a function of removing noise light from imaging light including noise light and reflected from an object to be photographed. A... | 01/06/1998 |
| 5705808 | Flash tube devices with a controllable electrical energy A flash device has a flash tube which generates light in response to electrical energy. The amount of light emitted by the flash tube is monitored by a circuit which is connected to means for adjusting the electrical energy supplied to said flash tube whe... | 01/06/1998 |
| 5665960 | Photoelectric converter device and method of manufacturing the same A photoelectric converter device having improved residual image characteristics and composed of a transistor having a control electrode region made of a semiconductor of a first conductivity type for accumulating carriers generated by an electromagnetic w... | 09/09/1997 |
| 5631458 | Range finder In a range finder, a capacitor for light emission is charged by turning off first and second switching elements and turning on third and fourth switching elements before light is emitted from a light emitting diode. A sum of a charging voltage of the capa... | 05/20/1997 |
| 5581078 | Ballistic optical camera trigger A ballistic optical camera trigger having an integrated circuit capable of onverting light to a proportional frequency, wherein the integrated circuit has a fast response time and a wide dynamic range which allows it to sense positive or negative changes i... | 12/03/1996 |
| 5548398 | Illuminant discriminator providing detection of high efficiency illumination An illuminant discriminator distinguishes a range of separate illuminants, including high efficiency fluorescent lighting, by modifying the frequency response of a signal output from a photodetector. A switchable high pass filter coupled to the photodetec... | 08/20/1996 |
| 5541401 | Arrangement for image generation and/or reading having pixel matrices of differing densities An arrangement e.g. for image generation and/or reading has first and second light element arranged substantially in two dimensions, control and addressing devices for activation of light or picture elements wherein at least the first light elements are r... | 07/30/1996 |
| 5394063 | Video light apparatus A reed switch is provided between a video camera and a battery pack circuit section. A current flowing when the video camera operates is detected by the reed switch. A video light is turned on or off on the basis of the detected current value. When the po... | 02/28/1995 |
| 5347563 | Method for determining the function representing the effect of non-reciprocity of a radiographic film The invention relates to radiology systems and, more particularly in such systems, to a method that enables the effect of non-reciprocity of the radiographic film to be determined. This effect of non-reciprocity is expressed by coefficients CNRD(di | 09/13/1994 |
| 5276320 | Photometering device A photometering device comprises: a generator for generating an analog voltage output which varies in accordance with a light intensity of an object field and is proportional to an absolute temperature; a reference voltage generator for generating a refer... | 01/04/1994 |
| 5225884 | Excimer laser pulse analyzer and method System and method for analyzing pulses from an excimer laser by measuring light energy rather than heat energy. The output of the laser is monitored with a photodetector to provide electrical current pulses corresponding to the intensity of the light in i... | 07/06/1993 |
| 5192968 | Photometer A photometer of a camera employs a MOS-type CPU having an open drain type transistor whose drain serving as an output terminal, a CMOS input terminal, and an input gate inverting an input with a value exceeding a predetermined potential. In the photometer... | 03/09/1993 |
| 5184172 | Method of and apparatus for automatically controlling exposure In an automatic exposure (AE) controlling method and apparatus according to the invention, a picturing area or a view is divided into a plurality of zones of which the central one is usually used for iris adjustment with the largest weight. The central zo... | 02/02/1993 |
| 4980545 | Photometric circuit A photometric circuit comprises a switching circuit which causes a photo conductive element which responds to the luminance of an object of measurement to be selectively connected with an oscillation circuit so that the photo conductive element functions ... | 12/25/1990 |
| 4929824 | light metering device with detector matrix and mean value detection A light metering device includes a light detecting number having a plurality of light detecting elements arranged in a matrix for detecting brightness of smaller divisions into which a whole image field is divided, respectively, to define a plurality of l... | 05/29/1990 |
| 4849781 | Range detector A range detector detects a range to an object to be measured by projecting light rays from a light source onto the object and producing an output signal by receiving light rays reflected by the object by a single semiconductor position detecting element (... | 07/18/1989 |
| 4808811 | Light integrating circuit for use in a light measuring device which is accurate for both low and high light values A light measuring circuit including a light sensing device for sensing light and producing a signal representative of the light sensed, a compressing circuit for compressing the signal, a capacitor having one terminal connected to a predetermined voltage,... | 02/28/1989 |
| 4774401 | Light measuring device variably controlled according to focus mode selection A light measuring device having an automatic focus control mechanism including one-shot type focus control means for effecting focus control in one-shot type focus control mode and servo type focus control means for effecting focus control in servo type f... | 09/27/1988 |
| 4704024 | Photometric circuit for camera A photometric circuit for a camera has a photo-electric conversion element arranged to measure light in the middle part of the angle of view of the camera and a plurality of photo-electric conversion elements arranged to measure light in the peripheral pa... | 11/03/1987 |
| 4701048 | Input circuit for distance measuring apparatus An input circuit which converts currents produced from a plurality of photo-sensitive elements arranged in a distance measuring apparatus. The input circuit has a switching element series connected to at least one of the photo-sensitive elements. When the... | 10/20/1987 |
| 4699504 | Control system for microimage recorders A distributed processor control system for use with a microimage recording apparatus includes a system control unit, a machine control unit and an operator control unit. The system control unit includes a microprocessor that provides supervisory or master... | 10/13/1987 |
| 4681441 | Light measuring device A light measuring device which is provided with a plurality of light sensitive elements and is arranged to selectively detect outputs of these light sensitive elements includes means for short-circuiting both terminals of the light sensitive element not r... | 07/21/1987 |
| 4657378 | Color printing control system and method A color printing control system for making prints from negatives having a color printer and a microprocessor. The output of photocells which read color negatives is applied to the microprocessor enabling it to calculate print time signals. These signals a... | 04/14/1987 |
