352 results about "Optical depth" patented technology

An imaging arrangement and method for extended the depth of focus are provided. The imaging arrangement comprises an imaging lens having a certain affective aperture, and an optical element associated with said imaging lens. The optical element is configured as a phase-affecting, non-diffractive optical element defining a spatially low frequency phase transition. The optical element and the imaging lens define a predetermined pattern formed by spaced-apart substantially optically transparent features of different optical properties. Position of at least one phase transition region of the optical element within the imaging lens plane is determined by at least a dimension of said affective aperture.

An apparatus and method for light and optical depth mapping, 3D imaging, modeling, networking, and interfacing on an autonomous, intelligent, wearable wireless wrist computing, display and control system for onboard and remote device and graphic user interface control. Embodiments of the invention enable augmentation of people, objects, devices and spaces into a virtual environment and augmentation of virtual objects and interfaces into the physical world through its wireless multimedia streaming and multi-interface display and projection systems.

A method and an apparatus for examining the subsurface microstructure of a sample are provided. Radiation from a plurality of optical radiation sources travels along a first optical path. In the first optical path, a device focuses the optical radiati n from each of the optical sources into a plurality of respective focal points along the first optical path to provide substantially continuous coverage of a selected portion of the first optical path. Then, a sample on the first optical path within the selected length extending into the sample is scanned along said selected portion of the first optical path.

A lidar system capable of remotely identifying calibrated absolute aerosol backscatter coefficients of atmospheric aerosol particles by transmitting a beam of light and spectrally separating the intensity of Rayleigh and Mie backscattering is disclosed. The transmitter features high pulse energy to generate sufficient Rayleigh backscattering, enabling atmospheric scanning in a timely manner. The transmitter employs a seeded Nd:YAG laser and a seeded stimulated Raman scattering wavelength shifter to achieve narrow bandwidth, eye-safe laser pulses. The receiver employs a telescope, collimating lens, beam splitter, molecular absorption filter, focusing lenses, and avalanche photodiodes. Mie backscattering is blocked by the molecular absorption filter to provide a Rayleigh signal, which is used with knowledge of atmospheric density to calibrate the Mie signal. The system is intended for atmospheric research and aerosol monitoring applications where calibrated Mie scattering intensity is necessary to measure the optical depths of aerosol structures such as plumes, clouds, and layers.

The invention belongs to the technical field of image processing, provides a multi-view-point computing and imaging method, and aims to acquire accurate and high-precision depth information. According to the technical scheme, the multi-view-point computing and imaging method based on a speckle-structure optical depth camera comprises the following steps of: acquiring a depth map and a color map from human-machine interaction equipment Kinect of Microsoft; detecting the edge of the color map, and expanding gap information until the expanded gap covers the edge, which corresponds to the color map, near the conventional depth map; then performing double-edge filtration estimation on points on the edge of the gap according to depth information and color information; limiting the estimation process by virtue of edge information of the color map; and after the color map and the restored depth map are acquired, converting the depth map into a disparity map, and synthesizing any number of virtual viewpoint maps by a disparity map synthesis method combining a depth image and a color image. The multi-view-point computing and imaging method is mainly applied to image processing.

The invention relates to marine hydrology parameter monitoring, and particularly discloses an optical fiber temperature-depth diving mark continuous measuring system. The system comprises a communication buoy, a main floating ball, an instrument bin, a demodulating system, a temperature-depth chain, a mooring rope, an acoustical releaser and an anchoring weight, wherein the communication buoy comprises a solar cell, a big dipper communication plate card and a satellite combined antenna; the demodulating system comprises a demodulation module and a lithium battery and is arranged in the instrument bin, and the temperature-depth chain integrates a temperature sensor and a pressure sensor for measuring temperature and pressure, and the communication buoy, the main floating ball, the instrument bin, the temperature-depth chain, the releaser and the anchoring weight are successively connected through the mooring rope. The optical depth diving mark continuous measuring system provided by the invention has the advantages that the high density, real time, continuation and long-term observation of a temperature-depth vertical section from a sea surface to 500m underwater are realized, the data is exact and reliable, and the economic benefit is high; the optical fiber temperature-depth diving mark continuous measuring system is widely applied in different marine observation operations and provides a novel observation means for measuring sea temperature-depth.

A gaze point detecting device 1 detects a gaze point of an object person by projecting a display image displayed by an LCD 8 to outside via a finder 4 and capturing an eye image of the object person by a CCD 11 in response to illumination light irradiated toward outside from the finder 4, and the device comprises an optical system 5 arranged spaced only a focal length apart from a display surface 8a on an optical path of an image displaying optical system between the LCD 8 and the finder 4; the optical system 5 being arranged on an optical path of an imaging optical system between the finder 4 and the CCD 11; a telecentric optical system including a diaphragm 9 arranged spaced only a focal length apart from the optical system 5 on the optical path; and a controller 3 that detects a position of the gaze point of the object person based on the eye image captured by the CCD 11.

The current invention relates to the method to achieve artificial vision with using flexible substrate based light emitting arrays, or optical passage arrays, to project image upon the retina of a human eye. Further, it relates to the method to detect the real-time focal length change of the eye-lens and modify the flexible substrate curvature and distance from the eye to vary global angle configurations of light beams that go into the eye to produce images on the retina at various focus depth of the eye to achieve re-focusable artificial vision.

A light source apparatus is provided with a light scattering region 5 containing light scattering particles 6 disposed in a part of a region extending from a semiconductor light-emitting laser chip 1 to an external space. An asymmetry factor g of the light scattering particles 6 and a transport optical depth <n> of the light scattering region 5 are set so that their product g.<n> satisfies a following condition:

2≦g·<n>≦40

The light source apparatus is of small-size and low-cost and can ensure safety of human eyes as well as obtain a high optical output.

A method and a system is provided for discriminating between healthy cervical tissue and pathologic cervical tissue based on the fluorescence response of the tissue to laser excitation (LIF) and the backscatter response to illumination by white light (in the spectral range of 360 to 750 nm). Combining LIF and white light responses, as well as evaluating a spatial correlation between proximate cervical tissue sites in conjunction with a statistically significant “distance” algorithm, such as the Mahalanobis distance between data sets, can improve the discrimination between normal and abnormal tissue. The results may be displayed in the form of a map of the cervix representing the suspected pathology.

Systems, methods, and apparatus for providing a fluid and reduced-toxicity optical media with optical analysis and therapeutic energy delivery. An aspect of the invention provides an aqueous solution of increased-salinity of between about 1% and 35%. An increasing salinity in accordance with the invention provides improved transmissive efficiency at many wavelengths and less toxicity than many existing systems and methods. A catheter having integrated fibers for probing or treating internal lumens or other tissues can include a liquid-inflatable balloon or flushing mechanism using the solution for displacing blood or other obstructions in an optical path between the fiber and targeted tissue. Methods including spectroscopy can be employed with the solution for diagnosing medical conditions associated with diseased vessels or other tissues while reducing the risk of permanent damage resulting from the diagnosis. Additional applications include the deliver of therapeutic radiation externally and internally to tissues through h the solution media.

The invention provides a non-invasive blood glucose detector based on a metabolic heat-optical method, and belongs to a human body blood glucose measurement device. The blood glucose detector comprises a detection probe and a data processing and displaying system, wherein the detection probe comprises a series of sensing measurement elements, such as an infrared radiation sensor, a thermistor, a humidity sensor, a light-wave receiver, a heat-conduction bar and the like, and is used for directly measuring parameters of detected positions of a human body; the data processing and displaying system comprises a microprocessor, as well as a display unit and a storage unit which are connected with the microprocessor respectively; a signal detected by the detection probe is processed by virtue of amplification filter, A/D (analog-to-digital) conversion and other modes, and then is input into the microprocessor; and the microprocessor carries out data processing according to a preset algorithm to acquire a blood glucose value detected by the detector, and displays and stores the blood glucose value. In the non-invasive blood glucose detector, a principle of combining a metabolic heat method and an optical method is adopted, so that the finally output blood glucose value has a higher reference value.

A reflector with high total reflection which is resistant to mechanical stresses. The reflector includes a reflector body and superimposed thereon (a) a functional coating such as a varnish, (b) a reflecting layer structure composed of a reflecting metallic layer and optionally arranged thereon one or several transparent ceramic layers, for example, layers having an optical depth of lambda/2. The reflecting layer structure contains, as its surface layer, a protective layer. The protective layer is a silicon oxide of general formula SiOx, wherein x is a number from 1.1 to 2.0, or it is aluminum oxide of formula Al2O3, in a thickness of 3 nm or more. The protective layer protects the underlying layers from mechanical damages. In the DIN 58196 abrasion test the protected surface does not show any damages after 50 test cycles with 100 abrasion strokes.

A new device and method for detecting the presence of living microorganisms in test samples are described. The device comprises a container with at least one section transparent to light, a growth zone located in said container containing a mixture of growth media capable of supporting growth of the microorganisms, and at least one indicator substrate that changes its optical properties due to growth of the microorganisms. A detection zone is located in the container adjacent to the transparent section, and a barrier layer comprising porous solid material separates the two zones, allowing diffusion of molecules and ions of metabolic by-products of the organisms, while preventing microorganisms and particulate matter of the test sample from penetrating into the detection zone.

A reflector with high total reflection which is resistant to mechanical stresses. The reflector comprises a reflector body and superimposed thereon (a) a functional coating such as a varnish, (b) a reflecting layer structure composed of a reflecting metallic layer and optionally arranged thereon one or several transparent ceramic layers, for example, layers having an optical depth of λ/2. The reflecting layer structure contains, as its surface layer, a protective layer. The protective layer is a silicon oxide of general formula SiO_x, wherein x is a number from 1.1 to 2.0, or it is aluminum oxide of formula Al₂O₃, in a thickness of 3 nm or more. The protective layer protects the underlying layers from mechanical damages. In the DIN 58196 abrasion test the protected surface does not show any damages after 50 test cycles with 100 abrasion strokes.

The invention, which relates to the field of metering equipment employing an optical method as a feature, provides a machine vision positioning method for automatic screw assembling. The method comprises steps of inputting and recording data, obtaining an image, carrying out image pretreatment, carrying out Hough transform treatment, calibrating a camera, and calculating a position. According to the method, a circle in an image is searched by using the Hough transform method and the center of the circle is used as a positioning point, so that defects of high selection requirement and low precision for feature point selection according to the existing visual positioning method can be overcome; and a defect of an assembling failure caused by inaccurate product position fixation by a clamp during the automatic screw assembling process in the prior art can be overcome.

The invention discloses a high-resolution remote sensing data atmospheric correction method comprising the following steps of: S1, obtaining related information from data element information; S2, calculating the apparent reflectance of the typical land surface; S3, obtaining a mask of the typical land surface; S4, building an AOD (Aerosol Optical Depth) inversion correction lookup table by utilizing an atmospheric radiation transmission model; S5, calculating the AOD of the typical land surface; S6, obtaining a land surface classification chart; S7, forming the AOD of an whole image through a spatial expansion method; and S8, executing atmospheric correction on the high-resolution remote sensing data according to the AOD of the whole image and the atmospheric correction lookup table to get the land surface reflectance of the high-resolution remote sensing data. In the method, the high-resolution satellite remote sensing data is used for obtaining the AOD of the whole image, the accuracy and usability of the atmospheric correction are improved, and automation of the whole flow from AOD to atmospheric correction is realized.

The invention provides an optical method based high-speed aircraft hot surface full-field deformation measuring device. The optical method based high-speed aircraft hot surface full-field deformation measuring device comprises a double-layer quartz lamp heating array, a thin-wall high-speed aircraft shell, a square transparent window, speckle particles, a thermocouple sensor, a signal amplifier, a temperature control computer, a driving power supply, a CMOS (Complementary Metal Oxide Semiconductor) camera, a lens, a narrow-band-pass optical filter and an image processing computer. In order to solve the problem of signal blockage caused by a high temperature radiant heat source between the CMOS camera and the surface of the high-speed aircraft shell, the vertical double-layer quartz lamp heating array is designed and the square transparent window with small area is formed, so that the optical camera lens can obtain images of the hot surface of the high-speed aircraft through the transparent window. The interference light ray of the quartz lamp heating array is shielded by selecting the narrow-band-pass optical filter with specific wave length, so that speckle images with high quality and no degeneration on the hot surface of the high-speed aircraft is obtained; a digital image correlation method is utilized for analyzing the speckle images under different temperatures to realize full measurement on the displacement field and the strain field of the hot surface of the high-speed aircraft in a high temperature environment.

The invention concerns image processing that includes the estimation of the optical depths of points in image data in order to enhance the image data. In particular but not limited to, from the optical depth noise present in the image due to aerosol in the scene, such as fog or haze, can be reduced. The invention concerns determining.a first cost for each point independently based on a determined metric (60) and then a second cost based on an expected correlation in neighbouring points (70). The two costs are then optimized (80) to determine an estimated optical depth for each point (80) that is then used to reduce the effect of aerosol in the image (84). Applications of the invention include, but is not limited to, surveillance systems so that objects in the scene of the image can be better identified once the image data has been enhanced to reduce the estimated noise. Aspects of the invention include a method, software, computer apparatus and a field programmable gate array.

An optical method and apparatus is utilized to provide rapid spatial averaging over a large sample area in a Raman spectrometer, without defocusing of the optical source or the collection optics. Spatial averaging provides a representative spectrum of a sample that is inhomogeneous, either in its composition or surface characteristics. The spatial averaging configurations and methods disclosed herein also reduce sample degradation or burning resulting from the high intensity of the directed optical source. Moreover, the dimensions of the sample area of the spatial averaging methods and configurations of the present invention are adjusted to match specific sampling requirements.

The invention discloses an online test method for the processing of a Cassegrain two-reflector optical system, which is used for the online test of the processing of the non-perfect imaging Cassegrain two-reflector optical system. The optical test system consists of a standard self-collimating plane mirror, the tested Cassegrain optical system, a compensating lens and an aspheric processing surface form detection instrument. The compensating lens is arranged on the back light path of the non-perfect imaging Cassegrain two-reflector optical system to compensate the spherical aberration of the original optical system, thereby enabling the tested Cassegrain two-reflector optical system to form a perfect image on points on the axis, and meeting the processing requirements of the pair of primary and secondary reflectors.

A method for modulating the E-field of an optical carrier signal utilizes a Mach-Zehnder modulator having a pair of independently controllable branches. A pair of independent branch drive signals V_L(t) and V_R(t) are derived. Each branch of the MZ modulator is driven with a respective one of the independent branch drive signals. By this means, a low cost conventional MZ modulator (interferometer) can be used to perform complex modulation of the E-field of the optical carrier. In some embodiments, this functionality is used to facilitate precompensation of optical impairments of an optical communications system.

The invention provides a method for detecting any defect in the inner wall of a hole by an optic way, which comprises the following procedures: a light pickup picks up an image formed by laser after reflecting on the inner wall of the hole, so as to get the depth at any point on the inner wall of the hole; the light pickup picks up an image formed by an illumination light after reflecting on the inner wall of the hole, so as to get the explored image of the inner wall of the hole and get the 2D sizes of the defect; and the 3D info on the defect is obtained by combining above two dimensions. By combining laser measurement with illumination light measurement, it is not only possible to get the 2D size of the defect, but also is possible to get the depth of the defect, so as to achieve 3D measurement of the defect; the use of a non-contact measuring way avoids any contact wear between a probe and the object to be measured, and improves the inspection speed.

Provided is a reliable or accurate optical detection method or such an optical imaging method. Also provided is an application technique using such a method. At least a part of an optical path starting from a light-emitting source or reaching a photodetector includes a plurality of optical paths. At a predetermined position of the optical path, beams of light after passing through the plurality of optical paths are mixed. This mixed light is used for optical detection or optical imaging. An optical-length difference among beams of light passing through the plurality of optical paths may be longer than the coherence length. Means for feed-backing predetermined characteristics of a target to the optical characteristics to be used for optical detection or optical imaging may be included. Such means may be used separately from the above. Such means may be applied to another technique, an application material or an application program.