Class 396/150 - Including focusing screen

Subclass of Class 396 - Photography
Definition: Subject matter including an optical device having a surface
No. of patents: 74
Last issue date: 04/06/2010

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Number	Title	Issue Date
7693412	Aureolegraph An aureolegraph includes a reflective screen with an aperture therein, a lens for focusing an image onto the screen, an imager for imaging the image on the screen, and a light trap for preventing light passing through the aperture in the screen from passing back out...	04/06/2010
7502557	Finder optical system and imaging apparatus comprising the same In a finder optical system, a primary image is formed by an objective lens on a primary image formation face and is passed via a relay optical system to form a secondary image on a secondary image formation face. This secondary image is observed via an ocular lens s...	03/10/2009
7336895	Diffuser panel and optical apparatus which uses this diffuser panel A diffuser panel having a plurality of micro lenses arranged on a surface of a substrate, a half or more of these micro lenses are in a shape which has (2n+1) angles. This diffuser panel provides rays which are uniformly diffused within a diffusion area and a light ...	02/26/2008
7286220	Test piece for optoelectronic image analysis systems A test piece for an optoelectronic image analysis systems is disclosed. One embodiment has a planar substrate, on which a plurality of geometrical patterns of differing shapes and/or sizes are arranged in a durable, predetermined surface coverage. The geometrical pa...	10/23/2007
7218449	Optical device for scanning an optical record carrier An optical device for scanning an optical record carrier (20) has a radiation source (25) that can emit two radiation beams of different wavelength along different optical paths (28, 29). The emitted radiation is focused on the record carrier an...	05/15/2007
7046925	Superimpose-plate for view finder A superimpose-plate is put on a focusing glass, on which a subject image obtained through the photographing optical system is formed. The superimpose-plate and the focusing glass are provided in an incident opening of a hollow pentagonal mirror. The superimpose-plat...	05/16/2006
7012750	Auxiliary light projection apparatus for auto focus detection An auxiliary light projection apparatus used for focus detection has a laser beam generating device and a diffraction plate for diffracting a laser light from said laser beam generating device. The diffraction plate has micro lenses regularly arranged in vertical an...	03/14/2006
6975810	Focal point detection device and camera A camera comprises a spatial modulation optical filter that is disposed in a viewfinder optical system for subject observation at or near a position optically equivalent to an estimated image forming plane of a photographic optical system and modulates a subject lig...	12/13/2005
6836619	Microlens array, optical apparatus, single lens reflex camera and optical finder In the microlens array, a plurality of microlenses are formed with an irregularity or probability-distributed regularity so as to differ from a hypothetical base pattern, the hypothetical base pattern having apexes of hypothetical microlenses each spaced apart from ...	12/28/2004
6795648	High resolution photographic system A high resolution photographic system has a lens, a camera body, a bellows connecting the lens to the camera body, a ground glass designed for use with a microscope for focusing on the aerial image, a magazine configured to store a roll of film, wherein the magazine...	09/21/2004
6749304	Device in optical representation systems of a motion picture or movie camera The invention relates to a device for improving image quality in focusing screens of an optical representation system of a movie camera, having a movably mounted translucent disk in a sandwich structure, a drive device moving the movable disk in the plane of the dis...	06/15/2004
6591065	Single-lens reflex camera having a focusing detection sensor capable of calibrating, and a viewfinder A focusing detection sensor is positioned in a viewfinder in a single-lens reflex camera but is nevertheless able to determine a focal point on an image of an object with enhanced accuracy. For that purpose, a single-lens reflex camera includes a camera b...	07/08/2003
6536907	Aberration compensation in image projection displays Optical projection systems for the display of electronic images often suffer from degraded image quality due to color field registration errors caused by lateral chromatic aberration. Although most projection lenses are partially corrected for lateral chr...	03/25/2003
6516152	Focusing screen for use in camera A focusing screen for use in a camera has a diffusive surface having a plurality of random pattern cells of one or a plurality of types arranged two-dimensionally so as to form a macroscopically flat surface. The random pattern cells are each composed of ...	02/04/2003
6466743	Real image type finder A real image type finder is provided with an imaging optical system, a focusing glass disposed at a focusing surface of the imaging optical system, an observing optical system for observing an image formed on the focusing glass, a case that accommodates t...	10/15/2002
6453126	SLR camera which can selectively utilize light-sensitive film or an image pick-up device An SLR camera system includes a camera body, a film back, and a digital back that are selectively attached to the camera body, the film back accommodating a light-sensitive film, the digital back having an image pick-up device, wherein the camera body inc...	09/17/2002
6408136	Zoom camera obscura A portable zoom camera obscura comprising: a telescopic structure including an inner tube and an outer tube positioned concentrically and slidingly movable relative to each other; a cover with a small, centered imaging hole attached to the imaging end of ...	06/18/2002
6366740	Apparatus and method for adapting a 35mm SLR still camera to a 35mm motion picture viewfinder The invention enables users to adapt 35 mm SLR still cameras to function as 35 mm motion picture viewfinders and adapt 35 mm SLR still cameras to create photographs which correspond to what they see through its viewing system. By substituting an accuratel...	04/02/2002
6314242	Single-lens reflex view finder A single-lens reflex view finder wherein a partial amount of a light bundle transmitting through an imaging optical system which picks up an image of an object is split by optical path splitting means, one of split optical paths is used as a view finder o...	11/06/2001
6266490	Antistatic viewfinder At minimum, a member near an image plane that is observed through an eyepiece is made of antistatic resin obtained by giving the resin itself ion conductivity so that its antistatic effect can be of long duration....	07/24/2001
6226461	Macromolecular liquid crystal element used in a diffusion plate A liquid crystal element which can regulate diffusivity simply. The liquid crystal element includes a diffusion plate having a macromolecular dispersion type liquid crystal interposed between a first glass plate and a second glass plate. The surface of th...	05/01/2001
6125239	Viewfinder device enabling display of optional photographic information A viewfinder device that includes a screen on which an image is projected, and an eyepiece lens through which the image is viewed. An optical member passes light beams from the screen to the eyepiece lens through an information display member, and a diffr...	09/26/2000
5802406	Focusing glass and photographic system A focusing glass and photographic system employing the same are disclosed. The photographic system includes an objective lens operable to form a real image of an object. The focusing glass is adapted to be situated at the real-image position, and comprise...	09/01/1998
5749001	Camera photometry device In a case in which the photometry region selected through a photometry region selection part is in the center of the screen, body spot photometry is selected for photometry of the object field, using luminous flux not passing through the screen. In all ot...	05/05/1998
5696630	Focal plates and method of manufacturing the same A focal plate for use in camera and a method of manufacturing the same are disclosed. The focal plate comprises an optical plate, a plurality of lens-like uneven portions regularly formed on the surface of the optical material, and a plurality of fine rug...	12/09/1997
5648652	Optical focus evaluation and focus adjustment methods, focus evaluation and focus adjustment apparatus, and screen apparatus The present invention provides methods and apparatuses to evaluate the best image plane position for an optical lens system, particularly a wide angle lens with a large power ratio, in e.g. an endoscope, in simple and less time consuming procedure. The pr...	07/15/1997
5457511	Single-lens reflex camera A changeover mirror is disposed behind a taking lens and is movable between a photographic position on the optical path of the taking lens so as to reflect light passing through the taking lens, on the one hand, and a viewfinder position displaced from th...	10/10/1995
5420661	Camera with camera-shake detection apparatus A camera wherein the light emitted by a subject, which has passed through a photographic optical system, is formed as an image on an area sensor, and which includes an electronic viewfinder that indicates the image of the subject based on the output from ...	05/30/1995
5333031	Camera having a liquid crystal focusing screen A diffusion degree of a focusing screen is changed by applying voltage to the focusing screen since the focusing screen comprises liquid crystal material whose molecules are penetrated onto a polymer network. The diffusion degree is changed according to t...	07/26/1994
5299037	Diffraction grating type liquid crystal display device in viewfinder There is provided a display device in a viewfinder, including a diffraction grating whose shape is determined at an interface between first and second materials, at least one of the first and second materials being adapted to have a variable refractive in...	03/29/1994
5189454	Phase-type focusing screen and process for manufacturing the same A phase-type focusing screen includes is made by using two photo masks each having a plurality of unit pattern regions regularly arrayed, each of which has a plurality of minute patterns of a predetermined shape and different size irregularly arrayed in s...	02/23/1993
5177637	Focusing screen including different height microlenses arranged in a cyclical pattern In a focusing screen having a large number of microlenses regularly arranged thereon, heights of microlenses are n different values. The microlenses having the same height are cyclically arranged. In another aspect, the heights of the microlenses in a sim...	01/05/1993
5161058	Focusing screen A phase type focusing screen has a plurality of minute patterns of a given shape formed by protrudent and/or recessed parts and allocated on a surface of an optically transparent base plate. Assuming that a stepped level difference between a top face of t...	11/03/1992
5124839	Phase-type focusing screen A focusing screen has a base plate with a planar surface. A plurality of unit regions are arrayed with a periodicity on the base plate planar surface. Each of the unit regions comprises (1) a first plurality of convex portions or concave portions having p...	06/23/1992
5119235	Focusing screen and method of manufacturing same A focusing screen of the type composed of a multitude of micro-lens-like curved surfaces arranged on a given plane is substantially regular in terms of their two-dimensional arrangement on the above-mentioned plane but exhibits some variation in terms of ...	06/02/1992
5089835	Phase-type diffusing plate A focusing screen suited to be used in the camera, having three plane portions of different heights in each of small areas, wherein the plane portion A, the plane portion B and the plane portion C are arranged in the order from the lowest height, and lett...	02/18/1992
5085977	Focusing screen and a method of forming a microstructure array for use with a focusing screen A method of forming a microstructure array suitable for use in the production of a focusing screen used in a finder system of a camera. The focusing screen includes an optical material in plate form having on one surface of a plurality small lens portions...	02/04/1992
5081545	Focusing screen A focusing screen for use in the finder system of a camera such as a single-lens reflex camera, and a method of forming a microstructure array suitable for use in the production of such a focusing screen. The focusing screen includes an optical material i...	01/14/1992
4993830	Depth and distance measuring system Apparatus for determining the relative distance or depth to an object. A light source projects light at an object whose distance is to be determined. A lenticular prismatic screen responds to light reflected from the object and generates two distinct imag...	02/19/1991
4982214	Focusing screen A focusing screen includes a regular array of a plurality of unit regions on an optically transparent substrate, and an irregular array of a plurality of minute patterns of at least two different sizes in convex or concave form on a surface of the substra...	01/01/1991

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Class 396/150 - Including focusing screen