Class 396/506 - Electro-optical, magneto-optical, or photochromic type

Subclass of Class 396 - Photography
Definition: Subject matter having optical media whose light transmission
No. of patents: 39
Last issue date: 02/23/2010

Number	Title	Issue Date
7665914	Iris diaphragm actuator, magnetic position sensing structure and arrangement method thereof An iris diaphragm actuator includes a magnetic position sensing structure, at least one driving element and a light intercepting element. The magnetic position sensing structure includes a magnetic element and a magnetic sensor relatively disposed. The driving eleme...	02/23/2010
7625142	Light quantity adjusting device A light quantity adjusting device includes a substrate having an optical path aperture, a blade located on the substrate to adjust the quantity of light passing through the optical path aperture, and an electromagnetic driver that drivingly opens and closes the blad...	12/01/2009
7585122	Aperture construction for a mobile camera An adjustable aperture construction for a camera comprises at least two electrodes, and an electrical circuit for applying a voltage to the electrodes in order to create an electric field between the electrodes. In addition the construction comprises a center unit w...	09/08/2009
7563041	Camera module with brightness adjustable LCD shutter in portable wireless terminal Disclosed herein is a portable wireless terminal with a camera module, which includes a camera lens assembly installed in a main board of the portable wireless terminal, an object photographing opening formed corresponding to the camera lens assembly on a case frame...	07/21/2009
7431518	Optical device, lens unit, and imaging apparatus An optical device and a lens unit each include a liquid container containing an insulating liquid and an electroconductive liquid which are mutually immiscible and optically transparent and have different refractive indices. The optical device and the lens unit also...	10/07/2008
7430370	Optical element, lens unit and image pickup apparatus An optical element and a lens unit each includes: a liquid container transmitting light at least in a predetermined optical axis direction, the liquid container containing an insulating liquid and an ionic liquid being mutually immiscible and optically transparent, ...	09/30/2008
7419314	Optical density changing element, optical element and photographing unit An optical density changing element comprising: an anode; and a cathode, wherein at least one of the anode and the cathode comprises a first compound that changes a spectral absorption spectrum of the first compound in a wavelength of 400 to 700 nm by providing an e...	09/02/2008
7339649	Lens barrel and imaging device A lens barrel and imaging device advantageous for making unnatural brightness variation in an image, due to a liquid-crystal light control element, less noticeable, while reducing the size of an optical system, are disclosed. A lens barrel comprises an optical syste...	03/04/2008
7265911	Zoom lens system having variable power element A multiple group variable focal length lens is provided. The lens has a first lens group including a variable power lens element and is positioned in a stationary manner along an optical axis. The lens also has a second lens group moveably positioned along the optic...	09/04/2007
7256884	Particle detecting system and method of detecting particles using the same There is provided a particle detector system and to detect particles on target including reticle and pellicle. The system includes a light transmitting device adapted to transmit light beam to a target through an electrowetting microlens, a light receiving device ad...	08/14/2007
7245347	Variable aperture stop with no moving parts A variable aperture stop with no moving parts is disclosed. The aperture stop comprises a first region comprising a first optically transmissive medium, a second region comprising a second optically transmissive medium, and an electro-optical structure adapted to se...	07/17/2007
7213984	Optical density-changing element, optical element and photographic unit To provide an optical density-changing element which has excellent properties that it can be brought into a colored state by applying only a low voltage, that it shows a rapid response speed and becomes completely colorless when restored to a bleached state from the...	05/08/2007
7186039	Imaging optical system An imaging optical system includes an image forming optical system forming an image of an object, an imaging device placed in the proximity of the image of the object, a liquid crystal element placed at a preset position on the optical path between the object and th...	03/06/2007
7181134	Optical element changing optical density in response to electromagnetic wave An optical element comprises: an electromotive force-generating element that generates an electromotive force in response to electromagnetic wave; and an optical density-changing element that changes its optical density according to the electromotive force, the opti...	02/20/2007
7126903	Variable focus lens A variable focus lens comprising a first fluid (A) and a second, non-miscible, fluid (B) in contact over a meniscus. A first electrode (2) separated from the fluid bodies by a fluid contact layer (10), and a second electrode (12) in contact with...	10/24/2006
6998219	Maskless photolithography for etching and deposition The present invention relates to maskless photolithography using a patterned light generator for creating 2-D and 3-D patterns on objects using etching and deposition techniques. In an embodiment, the patterned light generator uses a micromirror array to direct patt...	02/14/2006
6702483	Optical element An optical device capable of controlling its optical transmittance. The optical device has a first liquid conductive or having a polarity and a second liquid. The first and second liquids are substantially equal in refractive index but differ in transmitt...	03/09/2004
6493513	Exposure control device for camera preventing shutter release before aperture changeover A shutter device for a camera includes a shutter blade for providing an exposure by opening/shutting a photographic light path, and a shutter drive lever for driving the shutter blade. The shutter device includes a shutter release button. A photometric sw...	12/10/2002
6443638	Exposure control apparatus used for a camera A flash lever for actuating a flash switch is interlocked with a stop plate via a spring. When a picture is taken without a flash, photographing is performed in a state that a small stop opening of the stop plate is disposed at an optical path. When the f...	09/03/2002
6336753	Optical device, a fabricating method thereof, a driving method thereof and a camera system An optical device used for an optical filter or the like capable of controlling a light transmittance or light reflectance in a visible light region, a fabrication method thereof, a driving method thereof and a camera system are provided, including the op...	01/08/2002
5634163	Lens-fitted photo film unit A lens-fitted photo film unit is pre-loaded with photo film (31). An exposure is taken through an exposure opening (43) upon depression of a shutter button (14) to a full depressed position. A halfway position of the shutter button is less deep than the f...	05/27/1997
5555069	Camera with electrochromic filter A camera includes means for supporting an imaging element for recording a scene, an electrochromic filter disposed between the scene and the imaging element and a photoelectric element which emits electrical energy the value of which depends on an amount ...	09/10/1996
5541705	Camera with large dynamic range In accordance with the present invention, an apparatus and method are described which in general provide for an extended dynamic range in light sensitivity for an imaging device. This extended dynamic range is achieved primarily through control of the lig...	07/30/1996
5471339	Electrochromic diaphragm device A small-sized diaphragm device for an image pickup lens system having an electrochromic element the light transmitting properties of which are changed on application of an electrical voltage. The diaphragm device also includes a first set of plural concen...	11/28/1995
5414460	Mechanical aperture for controlling illumination level In an illumination system for a film telecine scanner of the type adapted to provide a line of illumination on the image frames of a film which is supported for rapid movement in a film gate of the scanner, an improved light control system for adjusting t...	05/09/1995
5258874	Friction-free bistable device for use in space application, in particular for closing an aperture of a space application optical instrument Device for the assembly and movement control of a mobile element that moves with respect to a support between two extreme positions, characterized in that it includes an arm pivotable around a rotation axis which supports the mobile element; an elastic to...	11/02/1993
5140212	Diaphragm electromagnetic drive device A diaphragm electromagnetic drive device which comprises ring-shaped rotor and stator disposed coaxially about the optical axis of a taking lens and in which the rotor is rotated to thereby rotate diaphragm blades so as to vary successively a diaphragm di...	08/18/1992
5068679	Imaging system for macrophotography An imaging optical system having a photographic lens and a mechanical stop is provided with a variable focal length lens disposed adjacent to a mechanical stop and having a diameter smaller than a maximum diameter of a beam of light capable of traversing ...	11/26/1991
4793689	Lens barrel with vibration wave motor A lens barrel includes a hollow rotary ring rotatable about the optic axis which is disposed within the hollow of a hollow fixed cylinder with a bearing interposed therebetween, a moving cylinder movable in response to rotation of the rotary ring which is...	12/27/1988
4774537	Iris or shutter arrangements An iris and shutter arrangement for a camera, particularly a CCD camera, in which a first liquid crystal display is formed of a plurality of concentric annuli of liquid crystal material and a second liquid crystal display is provided as a further pluralit...	09/27/1988
4591253	Adaptive vision system Cameras or optical devices requiring shutters to allow light to reach a light sensitive area from an object scene for a prescribed amount of time are provided with an electrically controlled light modulator to replace mechanical shutters. Cameras or optic...	05/27/1986
4526454	Camera having solid state diaphragm device A solid state diaphragm device is constructed by the use of an electrochromie material. Prior to an initiation of a shutter operation, the above-described solid state diaphragm device is supplied with a predetermined amount of driving current flowing in a...	07/02/1985
4422729	Electro-optical diaphragm with radial electrodes In the disclosed solid-state diaphragm device, a liquid crystal cell is driven by a matrix driving system. Electrodes of a set on one plate of the cell are arranged in concentric circular relation to each other, while electrodes of another set on the othe...	12/27/1983
4333720	Stop control device A stop device of the type using a physical property member which is arranged to have its light transmission factor variable and to form a light shielding part and a light transmitting part for effecting adjustment of an aperture value by adjusting the are...	06/08/1982
4313663	Electrooptic diaphragm and circuit operative for causing the diaphragm to open up stepwise and then close to terminate exposure Radially successive annular electrodes disposed in a general plane define between themselves intermediate annular zones in which is confined electrooptic material. Selected annular zones are rendered transparent by applying to pairs of selected annular el...	02/02/1982
4218120	Electrochromic light regulator An electrochromic light regulator for adjusting or regulating the amount of light passing therethrough comprises first, second and third electrode units stacked one above the other in spaced manner. A space between each adjacent two of the first to third ...	08/19/1980
4113359	Automatic diaphragm assembly An automatic diaphragm assembly for use in an optical or optoelectronic image pick-up device having lens systems, comprising diaphragm blades forming a variable aperture, at least one neutral-density filter element movable with one of the diaphragm blades...	09/12/1978
4095889	Exposure system for an electrophotographic printing machine An optical system in which a modulated light image of an original document is projected onto a receiving member. The optical system includes a lens and an opaque member having an array of apertures therein associated therewith to improve the light transmi...	06/20/1978
3955208	Photographic camera with liquid-crystal diaphragm arrangement A photographic camera includes a diaphragm arrangement comprised of at least one body of liquid crystal positioned in the path of light entering the camera. The size of the opening of the diaphragm arrangement is changed by changing the transparency of at...	05/04/1976

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Class 396/506 - Electro-optical, magneto-optical, or photochromic type