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| Number | Title | Issue Date |
| 7253575 | Industrial optical shutter A highly versatile optical shutter for industrial and scientific applications is disclosed. The has a aperture which defines a light path through the shutter, and a shutter vane or blade that is moved into and out of the light path using a precision, microprocessor ... | 08/07/2007 |
| 7099575 | Manual focus device and autofocus camera A digital still camera includes an aperture stop opening, a taking lens system, and a CCD pickup element. In a manual focus device, an iris shifting mechanism sets the aperture stop opening in an aperture stop unit with reference to a first light amount gravity cent... | 08/29/2006 |
| 6980251 | Image sensing apparatus which carries out optimum exposure control of subject The state of exposure of a video zone corresponding to position information from a two-dimensional position selecting circuit that allows a photographer to select a desired video zone is detected, an exposure correction is performed by an exposure control circuit ba... | 12/27/2005 |
| 6933523 | Semiconductor alignment aid An alignment aid for semiconductor devices. The alignment aid includes an area having a high level of reflectivity and an adjacent area having a of low level of reflectivity. The area having a low level of reflectivity includes at least one layer of tiles located in... | 08/23/2005 |
| 6477328 | Shutter for a camera A shutter for a camera comprises sectors for opening and closing a shutter opening by reciprocal pivotal movement, a motor for reciprocally and pivotally moving the sectors by forwardly and reversely rotating a rotor of the motor by forward and reverse el... | 11/05/2002 |
| 5287140 | Control unit for a program shutter A program shutter adapted to close shutter blades having the function of diaphragm blades by a cam member operated with an electric motor has improved control accuracy in high brightness. A blade opening and closing member for opening and closing the shut... | 02/15/1994 |
| 5202721 | Shutter device in automatic focusing and exposure camera A shutter device of a camera which includes first and second sector mechanisms which constitute a lens shutter and which are independently opened and closed to define an aperture. A photometer, for detecting the luminance of an object to be photographed, ... | 04/13/1993 |
| 5109250 | Program shutter A program shutter for automatic exposure control including a forwardly/reversibly rotatable step motor for opening and closing a shutter to effect automatic exposure in the control circuit for controlling the operation of the step motor. The control circu... | 04/28/1992 |
| 5070356 | Camera having television mode A camera having a television mode has a shutter unit for opening and closing a plurality of shutter blades used as a shutter and a diaphragm by rotating a step motor in normal and reverse directions; a photometric device for performing a photometric opera... | 12/03/1991 |
| 5040017 | Shutter apparatus having two blade members pivoted about one point A shutter mechanism, employed in a camera, is provided having a pair of blade members pivoted about a point. The blade members are moved between a position where the light path is completely shielded and another position where light is allowed to pass thr... | 08/13/1991 |
| 4864347 | Program shutter A program shutter has a plurality of shutter sectors driven in opening and closing directions by a reversible stepping motor to define a lens aperture during an exposure operation. An arithmetic circuit calculates an exposure amount corresponding to the b... | 09/05/1989 |
| 4864346 | Program shutter There is disclosed a program shutter for use in a camera. The program shutter consists of a shutter mechanism and a control portion. The shutter mechanism has sectors for defining an opening and a stepper motor for driving the sectors. The control portion... | 09/05/1989 |
| 4771309 | Strobe control circuit for flash photography A strobo control circuit for a program shutter which opens or closes sectors by means of a stepping motor, wherein a data ROM (read-only memory) is accessed in accordance with a value obtained by computing a code representative of a distance to a subject,... | 09/13/1988 |
| 4743934 | Exposure control apparatus for cameras A stepping motor drives camera shutter sectors to open and close an exposure aperture. The stepping motor is rotated at a speed corresponding to an exposure value during the time between the start position of the shutter sectors and their position when th... | 05/10/1988 |
| 4720726 | Shutter driving apparatus A shutter driving apparatus drives a programmed shutter with a stepping motor, by using a driving current pulse whose waveform has a leading half that gradually increases in amplitude and a trailing half having an amplitude smaller than the peak value of ... | 01/19/1988 |
| 4697908 | Program shutter A program shutter has a shutter mechanism comprised of at least one sector movable in opening and closing directions in response to forward and reverse rotation of a step motor to form a lens aperture. A control unit automatically controls the shutter ope... | 10/06/1987 |
| 4648701 | Control circuit for program shutter In a program shutter including a forwardly/reversely rotatable step motor for opening and closing a shutter blade to effect automatic exposure, a drive pulse number and an interpolation quantity are set in first and second counters. A step drive pulse is ... | 03/10/1987 |
| 4427276 | Microcomputer controlled photographic exposure system and method A microcomputer is employed in an automatic exposure control system for developing and controlling execution of film exposure strategies for both ambient light exposures and flash and fill flash exposures wherein the scene is illuminated with a mixture of... | 01/24/1984 |
| 4354748 | Photographic exposure system with computer controlled strobe unit A microcomputer is used in an exposure control system and method for developing and controlling execution of a film exposure strategy based on selected pre-exposure inputs including scene brightness level and camera-to-scene distance. The computer is prep... | 10/19/1982 |
| 4072963 | Programme-controlled shutter The invention discloses a programme-controlled shutter of the type in which a control circuit controls an exposure control mechanism consisting of a stepping motor and a plurality of shutter blades which also function as aperture setting blades in such a ... | 02/07/1978 |
| 4058816 | Camera exposure control system having digitally controlled timing circuitry including a decimal count storing memory This invention provides apparatus for producing a command signal used to control the closing of a camera shutter. Before the shutter opens, a photo-responsive portion of the apparatus generates a number of serially occurring data pulses. After the shutter... | 11/15/1977 |
| 4057810 | Exposure control system An exposure control device incorporates an electromagnetic driving device comprising a stator with a plurality of pairs of diametrically opposed poles each mounted with a field coil, a rotor made of a permanent magnet for rotation in either direction thro... | 11/08/1977 |
| 4016574 | Program-controlled shutter The invention discloses a program-controlled shutter wherein, depending upon the brightness of a subject, a suitable f-number and a suitable exposure time are determined by a plurality of shutter blades which are driven stepwise by a stepping motor in res... | 04/05/1977 |
| 4009866 | Exposure control device In an exposure control device of the type comprising exposure means including a plurality of shutter blades which also function as the aperture setting blades, and a step-motor drivingly coupled to said shutter blades for causing them to open and close st... | 03/01/1977 |
| 4005448 | Programmed shutter This invention relates to a programmed shutter designed to automatically provide suitable exposures to a camera wherein shutter blades serve also as diaphragm blades and a driving mechanism is intermittently actuated by impressed pulse signals. Suitable e... | 01/25/1977 |
| 3997905 | Program-controlled shutter The invention discloses a program-controlled shutter of the type in which, in response to the brightness of a subject, an electronic control circuit controls the motions of a stepping motor so that a plurality of shutter blades coupled thereto may be open... | 12/14/1976 |
| 3977012 | Exposure control system employing a blade position sensor An exposure control system for photographic apparatus utilizing motor driven shutter-diaphragm blades in conjunction with a blade sensor which is selectively positioned along the path of blade travel in accordance with an exposure value and which provides... | 08/24/1976 |
| 3950766 | Exposure control system employing blade sensing follow focus arrangement An exposure control system for photographic apparatus utilizing pulse driven shutter-diaphragm light regulating elements in conjunction with a follow focus mechanism which in response to the location of the light regulating elements terminates the driving... | 04/13/1976 |
| 3945025 | Exposure control system An exposure control system for photographic apparatus of a variety utilizing a pulse driven stepper motor to drive the light regulating elements of an exposure mechanism. The control system utilizes an exposure evaluating network, the output signal from w... | 03/16/1976 |
