63results about How to "Reduce imaging errors" patented technology

The invention provides a charged particle beam apparatus capable of preventing image errors in a display image and capturing a clear display image. A display image displayed on a display unit has a rectangular shape having sides that are substantially parallel to coordinate axes of a rectangular coordinate system determined by wafer alignment. A charged particle beam is radiated onto an area including a display image in a direction that is not parallel to the coordinate axes of the reference rectangular coordinate system to scan the area. Then, among image information obtained by scanning, only information of a position within the display image is displayed on the image display unit. In this way, a clear display image without brightness variation is obtained.

An objective lens system (2), particularly for a fingerprint reader apparatus, said lens system (2) comprising a first lens (8) formed as a condensing lens guiding light beams arriving from an object generally telecentrically, an aperture stop (9) having a centre (P) and being located in the vicinity of a focal point of the first lens (8), a correcting second lens (10) arranged between the first lens (8) and the aperture stop (9) and juxtaposed with the aperture stop (9), and a correcting third lens (11) formed as a condensing lens and arranged beside the aperture stop (9) opposite the second lens (10). According to the invention, the second lens (10) is a condensing lens with a spherical surface (S₃) facing the first lens (8), wherein the curvature centre of the surface (S₃) is at a distance shorter than 15% of the curvature radius of the surface (S₃) from the centre (P) of the aperture stop (9), and the aperture stop (9) is arranged at a distance shorter than 25% of the focal length of the first lens (8) from the focal point of the first lens (8).

The invention discloses a method for quickly obtaining and measuring an orthophotoquad of a city skyline contour line facede. The method comprises the following steps of: shooting a local image of the city skyline contour line facede hop by hop by a camera with a coordinate obtaining device, and recording the coordinate direction and the lens orientation of the camera at each shooting time; obtaining the horizontal distance between each shooting point and an object to be shot; building a geometric mapping relationship between each shooting point and the object to be shot to generate the orthophotoquad of the city skyline contour line facede; and outputting measurement data of the orthophotoquad of the city skyline contour line facede in combination with the city skyline contour line facede and the orthophotoquad of the city skyline contour line facede. After the method is used, the image distortion error caused by the conventional technology can be reduced, and the measurement precision can be improved.

The invention discloses a cubic visual method for detecting the storage of the coal field: first, equip the paired camera above the coal pile and measure the distance between the focal center and the photic platform; the camera moves along the photic axis and screens the coal piles referring to the center connecting line of the camera and the photic axis to get the pictures of the coal piles; get the theoretical pixel according to the pixel commutation of the coal pile pictures; calculate to obtain the coal pile pictures with the malformation removed and implement edge detecting; abstract the edge information; the area 9 of the edge point of the camera is the matching stencil; calculate the relative coefficient of the suited stencil and the sub-pictures covered by the stencil; select the conjugate point; fit the space curve face of the coal pile and calculate the size and the weight of the coal pile. The invention has high precision and low cost.

The invention discloses a mobile program-controlled multispectral imaging method and a mobile program-controlled multispectral imaging device, which are based on a spectral spectroscopic function of an electric rotary multispectral imaging device. An imaging lens, a plane array detector, a matched circuit and a touch screen, which are prepared by a smart phone, are used for being matched with a matching electric rotary multispectral imaging component, and wavelength entering a smart phone imaging camera is selected, which thus enables the imaging of different spectra to be realized. Furthermore, with the help of a mobile phone terminal software, real-time acquisition and analysis of spectral imaging data is completed, which can be popularized and applied to people's daily life.

The embodiment of the invention provides an imaging method and device of a three-dimensional light field display system. The imaging method comprises the steps that light field display information is obtained, and collection information is determined through a first preset relationship according to the light field display information; the three-dimensional light field display system is set according to the light field display information and the collection information, and a parallax image array is obtained through collection; a parallax image index corresponding to a first pixel index is determined through a preset index formula according to the number of parallax images and the pre-established first pixel index; according to the preset pixel number of parallax images in the parallax image array, liquid crystal display panel information and the first pixel index, a parallax image pixel index corresponding to the first pixel index is determined through a preset pixel determination formula; the position of the first pixel index is filled with a pixel value corresponding to the parallax image pixel index, and an imaging image is obtained and subjected to three-dimensional display. The three-dimensional image obtained through the imaging method and device is free of deep overturning phenomenon, the structure is simple, and the imaging error is small.

The invention provides a lens module comprising: a mirror seat provided with female threads on the inner wall; a first limit ring with male threads on the outer wall disposed screwably at the first position of the mirror seat inner wall; a second limit ring with male threads on the outer wall disposed screwably at the second position of the mirror seat inner wall; a cylinder with an outer diameter bigger than the inner diameters of the first limit ring and the second limit ring; at least one glasses lens contained in the cylinder, a first magnetic force generator disposed connectingly on the cylinder; and a second magnetic force generator fixed on the second limit ring. The first magnetic force generator and the cylinder are repulsed to the first limit ring when the facing magnetic pole of the second magnetic force generator and that of the first magnetic force generator are same; the first magnetic force generator and the cylinder are attracted to the second limit ring when the facing magnetic pole of the second magnetic force generator and that of the first magnetic force generator are opposite. The invention also provides a camera die set using the lens module.

The invention provides a line scan apparatus, and a method applied to the same. More specifically, a transport line formed by a transport mechanism is provided with at least one examination area used for examining test portions. Thus, image errors when shooting an examination area can be remarkably reduced and modularized transport machine devices can be provided according to all examination areas.

The invention discloses a measuring system of relative position of a laser mode and an aperture and a measuring method thereof, and mainly solves the disadvantage of low measurement precision of present systems. The whole system comprises a laser (1), an optical system (15), a resonator to be measured (6), a spectroscope (7), a total reflective mirror (8), an image acquisition and data acquisition system (16), a main control computer (13), and a piezoelectric ceramics driver (14); the piezoelectric ceramics driver drives the laser to output laser; the optical system is adjusted to allow the laser outputted by the laser to be coupled to the resonator to be measured; the laser outputted by the resonator to be measured are divided into two paths by the spectroscope and the total reflective mirror; the two-path laser is collected and transmitted to the main control computer by the image acquisition and data acquisition system; the main control computer processes images of the aperture andthe laser mode by using a high-precision image processing algorithm, and calculates the central coordinates of the aperture and the laser mode respectively. The invention has the advantages of synchronous CCD camera acquisition and sawtooth wave signals, and high measurement precision, and is applicable to the high-precision automatic regulation of the laser.

A method for designing an optical device which includes a lens and a microlens array is disclosed. A point spread function (PSF) of the lens including rotationally symmetrical aberration coefficients is formulated, wherein the PSF presents various spherical spot sizes. A virtual phase mask having phase coefficients is provided and the phase coefficients are added to the PSF of the lens, such that the various spherical spot sizes are homogenized. The virtual phase mask is transformed into a polynomial function comprising high and low order aberration coefficients. A surface contour of the lens is determined according to the rotationally symmetrical aberration coefficients and the low order aberration coefficients, and a sag height of each microlens in the microlens array is determined according to the high order aberration coefficients. An optical device using the design method is also disclosed.

The invention discloses a parallel accelerating imaging method of a blood vessel without contrast agent. The rapid imaging method of the blood vessel without contrast agent includes the following steps: obtaining two different blood flow signal sampling conditions by corresponding to two different blood fluid signals, processing the two different blood flow signal sampling conditions in a k space to obtain an additive signal sampling k space, conducing parallel acceleration sampling in the additive signal sampling k space to obtain k space sampling signals, transforming the k space sampling signals into folded and mixed signals in an image field, spreading the parallel acceleration which is based on N / 2 ghost imaging extension to obtain extended image field signals, and extracting blood flow images of the blood vessel from the extended image field signals. The rapid imaging method of the blood vessel without contrast agent improves the existing parallel acceleration imaging method, extends the corresponding relation of pixel position of various image areas and sensitivity of a radio-frequency coil and enables the improved parallel acceleration imaging method to be combined with the N / 2 ghost imaging method and to be applied to the blood flow imaging of the blood vessel without contrast agent.

Hard imaging methods, hard imaging device fabrication methods, hard imaging devices, hard imaging device optical scanning systems, and articles of manufacture are described. According to one embodiment, a hard imaging method includes providing image data corresponding to a hard image to be formed; generating light responsive to the image data; scanning the light to form a latent image corresponding to the hard image to be formed; accessing correction data corresponding to scanning errors of a scan lens intermediate a rotating reflection device and a photoconductor; and modifying the image data using the correction data before the generating, the modifying comprising modifying to reduce the introduction of image errors resulting from the scanning using the scan lens.