123results about How to "Increase depth of field" patented technology

The present invention provides monofocal ophthalmic lenses that exhibit extended depth of field while providing sufficient contrast for resolution of an image over a selected range of defocus distances. In some embodiments, a lens of the invention can include a refractive surface having controlled surface modulations relative to a base profile. The surface modulations are designed to extend a depth of field of the lens such that a single image can be resolved, albeit with somewhat less contrast, over a range of distances greater than the focal region of a conventional lens. The ophthalmic lenses of the invention can be employed in various vision correction applications, including, but not limited to, intraocular lenses, contact lenses, instrastromal implants and other refractive devices.

A means of enabling an imaging lens system that overcomes some of the costs and disadvantages of the prior art is disclosed. A lens system in accordance with the present invention reduces or eliminates one or more aberrations of an optical input by separating image collection functionality from image processing functionality. As a result, each function can be performed without compromising the other function. An embodiment of the present invention comprises a collection optic that provides a first optical field, based on light from a scene, to a processing optic that comprises a plurality of lenslets. The processing optic tiles the first optical field into a plurality of second optical fields. Each lenslet receives a different one of the plurality of second optical fields, reduces at least one localized aberration in its received second optical field, and provides the corrected optical field to a different one of plurality of photodetectors whose collective output is used to form a spatially correlated sub-image of that corrected optical field. The sub-images are readily combined into a spatially correlated image of the scene.

A method for constructing a final image using adaptive exposure control in multiple exposure photography, comprising: (a) capturing an exposure; (b) analyzing the exposure at least to determine deficiencies in the exposure; (c) setting exposure parameters for at least one next exposure adapted to construct the final image with ameliorated deficiencies; (d) capturing the at least one next exposure using the set exposure parameters; and, (e) constructing a final image utilizing portions of at least the two exposures.

A method and device (1) are proposed for accurately measuring in a reliable manner the distance of an object (99). The method comprises the steps of emitting a signal (such as a laser light beam), directing the signal to an object (99), detecting the signal diffused by the object (99), and comparing the detected signal with the emitted signal to obtain a comparison signal representing the distances travelled by the emitted signal and the signal diffused by the object (99) (for example, by sending modulated laser light and then measuring the phase difference between the emitted and received signals). The method of the invention is characterized by a step of setting the measuring device in order to define a reference operational configuration within the device. The setting is performed by means of a feedback circuit effective to calibrate at least one operational parameter of the device such that, upon illuminating a reference target (12,12a) which is placed at a known distance a predetermined value of the electric signal generated by the detecting means (5) is obtained.

The invention relates to a method for evaluating the construction quality of a tunnel, and discloses a method for evaluating the construction quality of tunnel drilling and blasting based on three-dimensional laser scanning. The method comprises the following steps of: acquiring data by adopting a tunnel data acquisition module at first, and then processing the acquired data by adopting a tunnel data pre-processing module, building a tunnel three-dimensional model building module according to the processed result, performing post-processing by adopting a tunnel three-dimensional model post-processing module, and finally, evaluating the result by adopting a tunnel drilling and blasting quality evaluation module. The method discloses by the invention has the advantages of being wide in measurement range, strong in applicability, high in automation degree, and good in reliability.

A head-up display system is described. The head-up display system includes an image projection device, a diffusion unit, and a frame demonstration medium. The image projection device emits the visible light, containing text or image information, for generating a real image on the diffusion unit. The frame demonstration medium receives the visible light reflected from the diffusion unit. By adjusting the received visible light reflected from the diffusion unit, the frame demonstration medium generates a virtual image corresponding to the real image. The distance between the real image corresponding to the diffusion unit and the frame demonstration medium is preferably equal to the distance between the virtual image and the frame demonstration medium. Alternatively, the visible light is projected to the frame demonstration medium and then reflected to the diffusion unit. The frame demonstration medium again reflected visible light from the diffusion unit to generate a virtual image corresponding to the real image.

The invention relates to an iris identification device by using a camera array and a multimodal biometrics identification method. The system comprises a plurality of cameras, a support structure, an indication unit, a light source, an acquisition card, a computer, and the like, wherein positions of the plurality of cameras can be freely arranged as required. The identification method is implemented according to the following steps that: a person stands naturally and aligns eyes with one of the cameras according to hints; the camera array is started, and each camera starts to acquire images; the computer circularly processes the images of the plurality of cameras at regular intervals and performs human eye detection respectively; and when a human eye image is detected in a path of signal, the path of the image is intensively processed and iris identification is performed. Based on the camera array device, the iris system can acquire iris images at different positions and different heights, so the acquisition range is widened, and the usability of the iris identification system is improved.

The invention provides a right-angled reflection type three-dimensional laser scanner and a method for realizing three-dimensional imaging by using the same. Coordinates of spatial points are acquired by using laser distance measurement and laser beam control data. Because the laser range is far, high depth of field can be acquired, and a shot object with large depth range can be scanned. For the shot object which can be born by a rotary table, the multi-side scanning can be realized, the multi-side surface textures of the shot object are acquired by shooting repeatedly through a camera, and a three-dimensional image of the shot object can be acquired through post treatment of the textures. For the object which cannot be born by the rotary table, multiple sides of the shot object can be shot by a plurality of times. Under the premise of ensuring larger scanning range, the whole device does not produce mechanical motion during working, the laser beam can be controlled only by two compact shafts, and the laser beam is not easily interfered by the outside; the 360-degree three-dimensional imaging of the outer lateral surface of the shot object is realized by adopting an auxiliary mode; and the three-dimensional imaging of a single lateral surface is realized by adopting an independent mode.

The invention provides for an optical measuring instrument and measuring device. The optical measuring instrument for investigating a specimen contained in a sample comprises at least one source for providing at least one electromagnetic beam intended to irradiate the sample and to interact with the specimen within the sample, at least one sensor for detecting an output of the interaction between the specimen and the electromagnetic beam, an integrally formed mechanical bench for the optical and electronic components, a sample holder for holding the sample, wherein the at least one source, the at least one sensor, and the mechanical bench are integrated in one monolithic optoelectronic module and the sample holder can be connected to this module.

A projector has a transmissive spatial light modulator backlit by a collimated illuminator that includes a light source that outputs red, green, blue (RGB) light, and a combiner disposed in light-receiving relation to the light source for mixing or combining the RGB light. The combiner has cavity features associated therewith for outputting collimated light, where such light preferably has a divergent cone angle less than plus or minus fifteen degrees (+/−15°).

The invention relates to the field of medical jurisprudence inspection, in particular to a diatom inspection method in medical jurisprudence. The method at least comprises the following steps: (1) microwave digestion: adding concentrated nitric acid and hydrogen peroxide solution into the inspected sample to carry out microwave digestion; (2) vacuum filtration: carrying out vacuum filtration on the digestion solution, adding ultrapure water, carrying out vacuum filtration continually until the surface of the filter membrane is approximately neutral, adding absolute ethyl alcohol, and carrying out vacuum filtration to remove moisture from the filter membrane; (3) a scanning electron microscope automatically takes pictures and stores the pictures; and (4) qualitative and quantitative analysis on diatom: carrying out inspection, classification and statistic treatment on the diatom in the on-spot pictures in an artificial identification way or computer automated identification way. The invention has the advantages of high detection sensitivity, high accuracy of qualitative and quantitative analysis, simpleness, high efficiency and environmental protection, can effectively avoid pollution, greatly improves the working environment for diatom inspection technicians in medical jurisprudence, and reduces the labor intensity, thereby having wide application prospects in drowning diagnosis practice in medical jurisprudence.

The present invention provides a lithographic method and apparatus (e.g., for printing contact holes on a wafer) that use a single mask, multiple exposures, and optimized pupil filtering. The method comprises: providing a mask including pattern features to be transferred to a wafer; transferring a first set of pattern features from the mask to the wafer using a first type of illumination and a first type of pupil filter; and transferring a second set of pattern features from the mask to the wafer using a second type of illumination and a second type of pupil filter.

A multiscale imaging system including microcameras having controllable focus, dynamic range, exposure, and magnification is disclosed. The objective lens forms a three-dimensional image field of a scene. Image regions of the image field are relayed by the microcameras onto their respective focal-plane arrays, which collectively provide a plurality of digital sub-images of the scene. The digital sub-images can then be used to form a composite digital image of the scene that can have enhanced depth-of-field, enhanced dynamic range, parallax views of the scene, or three-dimensionality.

The invention relates to a red-tide living thing image automatic identifying device and method, provided with a LED, a light source lens, a mobile room, an objective, a depth of focus lens and a camera; the LED is at the focus of the light source lens, the mobile room is between the light source and the objective, and the depth of focus lens is between the objective and the camera. The identifying method: obtaining image, preprocessing, detecting object, separating image, obtaining image feature, classifying and identifying object, and outputting result. It adopts a far-focus objective, adds an operating space between the mobile room and the objective, giving a development space to the mobile room, and increases the application range of the apparatus. It can automatically analyze images, heightening automation degree of the apparatus, and meets the request for field monitoring red-tide living things, hopeful to implement real-time monitoring the generating and disappearing course of the red tide, and on this basis, provides a precaution to the danger degree of the red tide.

An image scanner includes a light source (2), an imaging optics system (1), an imaging element section (41), a memory (5), and a processor unit (6). The imaging optics system is an optics system for collecting scattered light reflected on an object being imaged to image such collected light as a picture image, and has a plurality of cells (11) and the like which are arranged plurally in a main scanning direction (211) as independent imaging optics systems respectively and form a telecentric optics system at a manuscript side, while arranging the cells in two lines in a sub-scanning direction (212). Each cell in a respective line is arranged in a zigzag pattern in the main scanning direction such that imaged pictures can be complemented between each cell in the sub-scanning direction. The imaging element section is arranged corresponding to each of the cells. The processor unit restores the image information stored on the memory to the picture images and synthesizes those picture images to create a manuscript image.

The invention relates to a multi-touch focus imaging system and method, as well as an applicable mobile terminal, and discloses a multi-touch focus imaging method for a mobile terminal. The method comprises the following steps: adopting the mobile terminal to collect a scene to be shot and to display the corresponding picture; selecting a plurality of focuses in a picture of the scene to be shot by touch; collecting different images of the focuses of the same scene to be shot respectively aiming at the selected different focuses; carrying out image fusion on the different images of the focuses to finish imaging of the scene to be shot. The multi-touch focus imaging method adopts the multi-touch focus technology to solve the problem that in the same image, due to different focuses of articles, part of collected different articles in the same image are distinct and other articles are obscure; multiple focus images are adopted to enable images to be fused into one picture, so that the fully distinct effect is realized, and the depth of field of the picture is increased.

A camera system for a mobile device includes an array of compact catadioptric telescopes wherein at least some of the telescopes have a portion of their aperture truncated. At least some of the catadioptric telescopes in the array are tilted with respect to the system optical axis.

The embodiment of the invention discloses a light field display system, which comprises a rotating display screen subsystem, a display screen positioning device, a human eye tracking subsystem and a computer. The rotating display screen subsystem comprises a lamp pole which comprises a lamp panel, and the lamp panel comprises a vector pixel array which comprises real image vector pixels and virtual image vector pixels; the display screen positioning device comprises a plurality of lasers and light-sensitive sensors; the human eye tracking subsystem comprises a human eye tracking camera and a position computing unit, and computer equipment is connected with the rotating display screen subsystem and the human eye tracking subsystem; and a lamp panel controller is used for determining the position of the lamp panel according to sensing data of the display screen positioning device, and all the vector pixels on the lamp panel are driven to display the display content in the display direction so as to achieve 3D image display. Multiple people can simultaneously watch a naked eye 3D image, audience at different watching positions watch the different content of the 3D image, and the resolution and the field depth of the naked eye 3D image are increased.