37 results about "Optical modeling" patented technology

A method of constructing a virtual model of a gemstone including the steps of performing measurements of the gemstone to construct a three-dimensional (3D) model of an exterior surface of the gemstone; identifying one or more visible inclusions within an interior volume of the gemstone; for each identified inclusion, performing the steps of determining a location and 3D shape of the inclusion within the interior volume of the gemstone; capturing at least one image of the inclusion; using the at least one image to determine relevant optical characteristics of the inclusion; and constructing a 3D virtual model of the inclusion, said model including the 3D shape of the inclusion and optical properties of the inclusion based upon said optical characteristics; constructing a 3D virtual model of the gemstone which includes the 3D virtual model of the exterior surface of the gemstone and the 3D virtual models of the one or more visible inclusions within the interior volume of the gemstone; and generating a dataset representing said 3D virtual model, wherein said dataset may be used in subsequent computer analysis to provide a user with information relating to a visual characteristic of the gemstone.

There is provided an optical modeling apparatus that forms a model of a desired shape by sequentially forming hardened layers by irradiating a light curable resin with light. The apparatus includes a first light source that emits a light beam for plotting on the resin, a scanning device that scans the light beam from the first light source over the resin, a second light source that emits light that irradiates one fixed region of the resin at a time, a spatial light modulator that spatially modulates the light from the second light source and blanket-exposes a specified region of the resin, and an exposure position adjuster that moves, in at least one direction, the light from the spatial light modulator. The light beam from the scanning device and the light from the spatial light modulator form each hardened layer.

The present invention provides an optical modeling method capable of inhibiting distortion in an object to be modeled and modeling with higher precision. A square exposure region is divided into a plurality of pixels which are further divided into first and second pixel sub-groups, the first pixel sub-group is exposed such that neighboring pixels or more are not exposed at one time, and then unexposed pixels incorporated in the second pixel sub-group are exposed two neighboring pixels or more are not exposed at one time. A photo-curable resin is exposed twice, and then cured in an amount of one photo-curable resin layer. Accordingly, the neighboring pixels are not exposed at one time, the producing of curing shrinkage is limited within one pixel, and distortion due to the curing shrinkage does not spread to the pixels neighboring the one pixel, whereby distortion in the object to be modeled can be inhibited significantly, and modeling with higher precision is made possible.

In order to perform positional control of a condensing spot of pulsed laser beam highly accurately when performing optical modeling, optical recording or the like in optical machining technology, optical recording technology or the like which uses various kinds of pulsed laser, which are ultra-short pulsed lasers such as a femtosecond laser and short pulsed laser such as a picosecond laser and a sub-picosecond laser, as a light source, a pulsed laser system detects an output beam from a pulsed laser, controls laser oscillation of the pulsed laser based on the detection result such the output beam contains CW laser beam together with pulsed laser beam, and allows the pulsed laser to output the pulsed laser beam and the CW laser beam simultaneously as the output beam from the pulsed laser.

There is provided an optical modeling apparatus that forms a model of a desired shape by sequentially forming hardened layers by irradiating a light-curable resin with light. The apparatus includes a first light source that emits a light beam for plotting on the resin, a scanning device that scans the light beam from the first light source over the resin, a second light source that emits light that irradiates one fixed region of the resin at a time, and a spatial light modulator that spatially modulates the light from the second light source to blanket-expose a specified region of the resin. The light beam from the scanning device and the light from the spatial light modulator form each hardened layer.

A method for designing an asymmetric light-emitting diode (LED) street lamp based on light distribution optimization belongs to the filed of non-imaging LED lighting and solves problems of insufficient brightness uniformity, 'zebra effect' production and damage to road safety. The method comprises knowing road construction basic parameters; designing light distribution; simulating lighting and analyzing lighting standards; calculating an initial structure of a light distribution lens; carrying out optical modeling and simulation; meeting performance requirements; and finishing design. The method carries out the light distribution optimization by comprehensively considering using functions, road grades and various evaluation indexes of road lighting, meets the design standards of the road lighting, and really satisfies the requirements of city road lighting. The light distribution lens of the LED street lamp is asymmetric in road directions, the light deviates to the direction of motorways, and light energy utilization efficiency is greatly improved. Difference value optimization feedback is carried out in the design process, the light energy distribution after the light passes through the lens approaches to ideal state, and performance of the lens is improved.

The invention belongs to the digital image processing technical field and relates to a Fourier optical modeling-based coded aperture camera image restoration method. In order to decrease dependence on actual photographing and reduce noise error introduced by manual photographing, the imaging mode of a coded mask optical imaging system is quantitatively analyzed, and finally, the point spread function of a coded aperture camera can be obtained, and the point spread function is adopted as prior data to restore an image. According to the technical scheme of the invention, the Fourier optical modeling-based coded aperture camera image restoration method includes the following steps that: (1) a coded mask imaging system is quantitatively analyzed, and the coded mask imaging system generates a simulation point diffusion function of a coded aperture camera under arbitrary depths; and (2) with the point diffusion function under arbitrary depths in the step (1) adopted as a fuzzy kernel, de-convolution is performed on scene images photographed by the same coded aperture camera, and a simulation result is optimized according to a maximum posterior probability MAP principle, and the image of the original scene can be obtained. The Fourier optical modeling-based coded aperture camera image restoration method of the invention is mainly applied to digital image processing.

A process for providing illumination source conditions for the accurate determination Zernike tilt coefficients in the presence of coma is described. Large feature-shift coma sensitivity is simulated for a range of illumination conditions. The resulting source sensitivity data is modeled and a practical array of source shapes, each of which is optimized to eliminate the effects of transverse distortion due to third-order coma, is identified. The optimized set of source shapes can be used to more accurately determine Zernike terms a2 and a3 using a variety of methods. Knowledge of the lens distortion data in the absence of coma induced shifts can be entered into more traditional overlay regression routines to better identify systematic and random error. Additional applications of the above outlined procedure include: improved lithographic simulation using conventional optical modeling software and advanced process control in the form of feedback loops that automatically adjust the projection lens for optimum system performance.

The present invention relates to a method for determining a matrix of transmission cross coefficients w for an optical modeling in an optical proximity correction of mask layouts. In a first step, there is calculation of Fourier transforms of an illumination aperture, a lens aperture and a complex conjugate lens aperture, which are present in the form of image matrices with a predetermined raster. A second step involves calculating Fourier transforms for the transmission cross coefficients w from the Fourier transforms by means of a convolution theorem in order to obtain the matrix of the Fourier transforms of the transmission cross coefficients w. A further step involves inverse-transforming the Fourier transforms of the transmission cross coefficients w by means of a fast Fourier transformation in order to obtain the matrix of the transmission cross coefficients w for the optical modeling in the optical proximity correction of mass layouts.

The invention generally relates to optical modeling and especially relates to an LED virtual display model, for solving the problem of adaptability of a conventional virtual LED display screen modeling method to green, red and blue colors of LED pixel points in the prior art and the problem of gray-scale compromise of a time-division multiplexing technology. The LED virtual display model provided by the invention comprises a modeling method and a control method. In the modeling method, a screen is divided into a plurality of triangles by taking each sub-pixel as a summit, and virtual pixel points are disposed at the center of each triangle. In the control method, a mask layer is created by use of a smooth filter, according to an actual screen sequence, color values of corresponding points are extracted, if the actual screen is arranged in the same way as the modeling method, values of red sub-pixels are extracted at a (1,1) point of an image as the value of R, values of green sub-pixels are extracted at a (1,2) point as the value of G, and thus a new one-dimensional matrix can be re-gained through extracted values of various sub-pixels according to the sequence.

A multifocal IOL (M-IOL) has a phase-altering characteristic that can control the diffraction and interference of light propagating there through to effect multifocality and extended depth of focus (EDOF). The embodied IOLs include engineered, discrete phase profiles on one or both of the anterior and posterior surfaces of the lens to intentionally manipulate the light in a designated manner. A design method for defining the discrete phase profile on the lens surface. The engineered phase profile is constructed by concentric annular zones having an abrupt step jump at the trailing circumferential edge of each zone. An optical modeling method to simulate the optical performance of the embodied IOLs in an optical ray tracing environment.

The invention relates to the semiconductor manufacturing field, in particular to an optical modeling proximity correction method of SRAM (Static Random Access Memory) grid dimension. The invention discloses an optical modeling proximity correction method of SRAM grid dimension, comprising a step of establishing an optical grid proximity effect model with substrate information through test reticle mask design and model data acquisition, thereby achieving the purpose of predicting spacing distances among grid line terminals precisly and ensuring a craft window big enough for a photoetching process of the grid.

A method and system for real-time, in-line measurements of thicknesses of semiconductor layers of photovoltaic devices is provided. The method and system include taking ex-situ optical data measurements after deposition of the semiconductor layers. The measurements are then used to calculate the thicknesses of the layers in real-time using optical modeling software.

The invention provides an optical modeling and simulation method of optical and mechanical system under air disturbance. It achieves the optical performance assessment within the same software and addresses many problems arising from the calling of multiple application software in the integrated simulation in the past to make the simulation faster and more stable through the development of integrated optical modeling algorithm (the core of which is ray-tracing). For the simulation of air disturbance, the adopted approach is to first discretize it, simulate the air disturbance as the disturbance of each partition surface, and simulate each part of air as the prism of different refractive indexes. This simulation method simulates the complex air fluid as the rigid disturbance of disturbance surface and simplifies the complex issue, which is easy for the actual operation of computer simulation. This method, with simple modeling and simulation operation and low error rate, only need use the integrated optical modeling algorithm programming, and input the parameters of the designed optical and mechanical system and the parameters of divided air surfaces to calculate the disturbance optical sensitivity matrix of the system. During the simulation, it sets the parameters of the module as these disturbance optical sensitivity matrixes to obtain the real-time disturbance optical performance of the system. In addition the method requires low computer hardware configuration, with high applicability and economy.

An optical modeling method and an electronic apparatus for building a target lens model are provided. The optical modeling method includes: calculating and generating a first lens model according to a spatial intensity distribution of a light source and a first target intensity distribution; introducing an external shape of the light source and calculating a first intensity distribution according to the spatial intensity distribution and the first lens model; obtaining a first difference level by comparing the first target intensity distribution and the first intensity distribution; taking the first lens model as the target lens model if the first difference level is not greater than preset threshold; otherwise, correcting the first target intensity distribution to a second target intensity distribution according to the first difference level, and calculating and generating a second lens model according to the spatial intensity distribution of the light source and the second target intensity distribution.

The invention discloses a design method of a combined paraboloid type solar concentrator, and the method comprises the following steps: determining optical and operating parameters of the concentrator; setting the area of a light outlet according to requirements, and taking the condensation power obtained at the light outlet when sunlight is incident perpendicular to the light inlet as a design target parameter and setting the value of the design target parameter; determining geometric parameter combinations of the condenser, and establishing a geometric model of the design scheme under each combination; simulating the gathering process of the solar energy in each scheme to obtain corresponding light gathering power; finally, selecting the scheme meeting the design requirement, and selecting the scheme with the maximum receiving half angle as the final scheme. And if the scheme meeting the requirement is not obtained under the current geometric parameter combination, automatically adjusting the geometric parameter combination, and redesigning until the scheme meeting the requirement is obtained. Geometric design, model construction, optical modeling and performance evaluation of the combined paraboloid type condenser can be rapidly and accurately carried out, and automatic design of the condenser is achieved.