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Class 250/201.6 - Based on triangulation


Subclass of Class 250 - Radiant energy
Definition: Subject matter in which the focusing is based on geometric
No. of patents: 125
Last issue date: 11/08/2011


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NumberTitleIssue Date
8053712Use of a photoelectric converted signal to inspect an objective lens driving device
An inspecting method for an object lens driving device including a base, an objective lens, a holder for holding the objective lens on the base, and a drive mechanism for driving the holder so as to move the objective lens in the focus direction, the method comprisi...
11/08/2011
7412159Image pickup apparatus and defocus amount correction value calculation method
An image pickup apparatus, in which a light is projected toward a physical object by projection means, and based on the reflected light by the physical object of the light, a defocus amount is detected (steps S2003 to S2008) by the first focus detectio...
08/12/2008
7324218Method and device for distance measurement
The present invention relates to a device (10) for distance measurement, with at least one transmitting branch (14) with a transmission source (22, 24) for a measurement signal for emitting a modulated measuring beam (16, 26, 36) in the d...
01/29/2008
7286287Visual aid in the form of telescopic spectacles with an automated focusing device
A vision aid in the form of telescopic spectacles has two lens systems, which each comprise at least one objective lens (70) and one eyepiece (71). An autofocussing element which changes the focal length of the lens systems for sharp focussing thereof ...
10/23/2007
7193731Optical displacement sensor
Optical displacement sensor may possess light-emitting element(s) for projecting light onto distance measurement target(s), and light-receiving element(s) capable of receiving light reflected from distance measurement target(s) and disposed such that light-receiving...
03/20/2007
7180662Stage assembly and method for optical microscope including Z-axis stage and piezoelectric actuator for rectilinear translation of Z stage
A stage assembly mountable on an optical microscope for orienting a sample into a desired focal position includes an X-axis plate operable for rectilinear shifting in the X-axis direction and a Y-axis plate mounted on the X-axis plate operable for rectilinear transl...
02/20/2007
7130027Reflection-photometric analytical system
This invention generally relates to a reflection-photometric analytical system having a measuring head comprising a source of radiation and a radiation detector for the reflection-photometric analysis of a target surface of a test object arranged at a distance from ...
10/31/2006
7119912Ranging sensor and electronic device using the same
A ranging sensor includes: a light emitting element; a projection lens for projecting light emitted from the light emitting element to an object; a condenser lens for condensing light reflected from the object; and a light receiving element, provided at the light co...
10/10/2006
6995849Displacement sensor
A displacement sensor is provided with: a light-projection unit; a light-receiving unit having a light-shielding mask and a light-receiving element; a first light-converging element which converges luminous fluxes released from the light-projection unit on a measuri...
02/07/2006
6980304Method for measuring a characteristic dimension of at least one pattern on a disc-shaped object in a measuring instrument
The measurement of the width of a pattern on a semiconductor wafer or a flat panel is carried out in an optical microscope or a scanning electron microscope in a number of measuring steps, By a computing rule, the quality of the correlation between the measured data...
12/27/2005
6897422Measuring configuration and method for measuring a critical dimension of at least one feature on a semiconductor wafer
A scanning electron microscope is integrated in a common measuring configuration with at least one device for the angle-dependent measuring of the scattering or diffraction of light. This measuring configuration includes a common transport system, which handles the ...
05/24/2005
6897421Optical inspection system having an internal rangefinder
An optical inspection system comprises an optical system for providing an image of an object being inspected. The optical system comprises a plurality of lenses arranged along a normal optical axis, one of the lenses including an objective lens. A collimated laser b...
05/24/2005
6850325Temperature compensated optical system based on a diffractive optical element
The present invention relates to an apparatus for the determination of a condition or state of an object based on quasi-elastic interaction between the object and light transmitted to the object, the apparatus comprising a diffractive optical element having a diffra...
02/01/2005
6844562Distance measuring sensor and method for manufacturing the same
A distance measuring sensor includes a case subassembly having inside a light emitting element and a light receiving element, and a lens case subassembly having a projection lens projecting a light output from the light emitting element and a condenser lens condensi...
01/18/2005
6833909Device for optical distance measurement of distance over a large measuring range
The invention relates to a device for optical distance measurement, having a emitter unit (12) having a light source (17, 18) emitting modulated optical beam (13, 20, 22) to a target object (15), and having a receiver unit (14), sp...
12/21/2004
6812479Sample positioning method for surface optical diagnostics using video imaging
Disclosed is a position system and method for correcting the position of a workpiece during a manufacturing process. The system includes a light generating means for projecting a light beam onto the top surface of the workpiece at a predetermined angle and a video c...
11/02/2004
6768540Phase difference detection method, phase difference detection apparatus, range finding apparatus and imaging apparatus
A phase difference detection apparatus for detecting a phase difference between images formed on a pair of optical sensor arrays in which the possibility of unproductive compensation is reduced by use of a compensation effectiveness judgment unit that judges whether...
07/27/2004
6763140Method and apparatus for focusing a micro-imaging system onto a tilted or uneven sample to acquire images of the sample
A mesh is created from selected focus points having locations on a surface of interest of a sample being micro-imaged. The mesh and associated focus settings of the focus points are used to define adjacent focus facets forming a focus surface substantially coinciden...
07/13/2004
6697146Range finder for finding range by image realization
A range-finder, capable of finding a range by image realization, having two distantly arranged imaging devices. The first pattern having a predetermined size and the first positional information is extracted by the pattern extracting section from the firs...
02/24/2004
6650401Optical distance sensor
An optical distance sensor is provided with a substrate on which a light emitting element and a light detecting element are disposed, and a single optical structure including a first converging mechanism for converging a light beam emitted from the light ...
11/18/2003
6472652Distance measuring apparatus
Reflected light of each light beam projected toward an object at a distance to be measured is detected to provide a far signal and a near signal, and the far signal is compared with a preset clamp signal. The larger signal resulting from the comparison is...
10/29/2002
6456794Distance-measuring apparatus
Distance measurement operations are executed by carrying out projection of light from IRED 4, reception of light by PSD 5, arithmetic operation by an arithmetic unit, and integral operation by an integrator plural times, and thereafter a detector detects ...
09/24/2002
6433857Optical traingulation displacement sensor using a diffraction grating
Disclosed herewith is an optical triangulation displacement sensor using a diffraction grating. The optical triangulation displacement sensor includes a light source element, a condenser, a light-receiving element, an image formation lens, a transmission ...
08/13/2002
6433858Autofocusing apparatus of a sighting telescope
An autofocusing apparatus of a telescope for automatically focusing on an object viewed within a field of view of the telescope through a distance-measuring zone arranged in the field of view, includes: a multi-point distance measuring device which divide...
08/13/2002
6333782Distance measuring apparatus
A distance measuring apparatus projects light toward an object at a distance to be measured, detects reflected light at a position according to the distance to the object to output a position signal, generates a distance computation value based on the pos...
12/25/2001
6295124Rangefinder apparatus
In the rangefinder apparatus in accordance with the present invention, an infrared emitting diode (IRED) having four light-emitting areas projects a first correction beam when only a first light-emitting area emits light, a reference beam when the first a...
09/25/2001
6246467Rangefinder apparatus
A rangefinder apparatus, which projects light toward a range-finding object, detects light reflected from the range-finding object, and measures the distance to the range-finding object according to a position where the light is detected, includes a step-...
06/12/2001
6122039Method and apparatus to detect and report object displacement utilizing optical triangulation principles
A object displacement measuring system and utilizing optical triangulation techniques is constructed to determine the displacement of an object between a near and far sensing limits. In constructing the system to determine the object displacement relative...
09/19/2000
6104476Distance measuring apparatus and computer readable storage medium
A distance measuring apparatus having skimming function which suppresses electric consumption when a charge storing period is shortened by an electronic shutter function. For this purpose, at an initial setting, an integration period is set to T1
08/15/2000
6084658Distance measuring apparatus
A distance measuring apparatus provided with a plurality of light-emitting units and a plurality of light-receiving units. The light emission period of each of the light-emitting units is changed over at each predetermined period interval. A plurality of ...
07/04/2000
6046795Distance measuring instrument
A measuring instrument is formed of an image pickup device having a pair of image-forming lenses and photosensor arrays; and an arithmetic device using two images of a measured object photographed by the image pickup device to calculate the distance to th...
04/04/2000
5999249Position detecting element and range sensor
A position detecting element that enables a position to be detected at high speed and high precision, and a range sensor using the same. The position detecting element is provided with a PIN photodiode array 1 having n segments and a parallel arithmetic p...
12/07/1999
5969820Surface position detecting system and exposure apparatus using the same
A surface position detecting system for detecting a position of a surface of an object disposed opposed to an exposure system, with respect to a direction of an optical system of the exposure system, includes an irradiation device for projecting light to ...
10/19/1999
5963308Distance measuring apparatus
In a distance measuring apparatus for measuring the distance to an object on the basis of reflected light obtained as a result of projecting light toward the object, in the case of an active distance measurement operation, the flickering frequency of a li...
10/05/1999
5939705Image information detection system and optical equipment using the system
The difference in brightness between the brightest area and the darkest area of the object of distance measurement can be speedily detected, as described above, and it can be determined before contrast calculation and correlation calculation are performed...
08/17/1999
5920382Distance-measuring apparatus
A distance-measuring apparatus includes light-sensitive devices formed of optical sensor arrays disposed on image-forming surfaces of right and left image-forming lenses, respectively. The apparatus uses image data from the optical sensor arrays of the li...
07/06/1999
5905567Method and apparatus for optimizing sub-pixel resolution in a triangulation based distance measuring device
An apparatus for optimizing sub-pixel resolution in a triangulation based target distance measuring device at a desired stand-off distance has a laser light source projecting a light beam along a light beam axis so as to project a light spot onto a surfac...
05/18/1999
5905576Optical displacement measurement device and optical displacement measurement system
A laser diode 11 irradiates an object 3 with beam light modulated in an appropriate cycle. A position detection element 21 outputs a pair of position signals responsive to the position of a light reception spot and a processing section finds a distance to...
05/18/1999
5900611Laser scanner with integral distance measurement system
The present invention relates to a scanner for reading coded symbologies. The invention uses a coherent, visible light source for illuminating the coded symbol during a scan and a detecting means for collecting the reflected light energy from the coded sy...
05/04/1999
5883379Device and method capable of converting a position signal into a frequency signal using a photoelectric position sensitive detector
A device and method capable of converting a position signal into a frequency signal using a photoelectric position sensitive detector is provided. The device capable of converting a position signal into a frequency signal comprises: a PSD, two current mir...
03/16/1999
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