43results about How to "Fix out of focus" patented technology

The invention discloses a method and application of femtosecond laser direct writing processing with a near 4π solid angle by using multi-photon excitation, which belongs to the technical field of laser processing. The main principle of the out-of-focus problem when performing direct writing with a large buried depth is to split the femtosecond laser beam and then focus it inside the material to be processed, so that the energy of multiple photons can be "sufficient" to the corresponding energy threshold of the original single-photon excitation , so as to achieve the processing purpose of material modification. At the same time, the time-domain synchronization of the sub-beams after beam splitting is adjusted, and they are finally nearly orthogonally converged at the position to be processed, so as to obtain a near-spherical focal spot with a solid angle of nearly 4π. In this way, the use of multiphoton lasers solves the out-of-focus problem of femtosecond laser direct writing at large embedding depths, and a three-dimensional embedding structure with uniform properties at different processing depths can be obtained.

The invention relates to a light-concentrating type LED dual-light lens die set. The light-concentrating type LED dual-light lens die set comprises a radiator, a light source assembly mounted on the radiator, a light barrier assembly and a lens assembly, wherein the light barrier assembly and the lens assembly are mounted at the front part of the radiator; a first circuit board of a near LED die set of the light source assembly is mounted on a first mounting surface of the radiator, and a reflecting mirror with a free-form surface is mounted at the upper part of the radiator; rays emitted by a neat LED light source are reflected to a focal spot O in the lens by the reflecting mirror to be collected, and then ejected to the lens through a light barrier so as to form a near dead line light type; a second circuit board of a distance LED die set is mounted on a second mounting surface of the radiator, and a light condenser is mounted at the front part of the radiator through a light condenser bracket; and rays emitted by the distance LED light source are totally reflected to the focal spot O in the lens through the light condenser to be collected, and then ejected to the lens so as to form a distance light type. The light-concentrating type LED dual-light lens die set disclosed by the invention is compact in structure, can improve the precision of the distance light type and the near light type, and well solves the problems that dead lines spray color light, the distance light and the near light are out of alignment in focusing, and the distance light is uneven.

The invention belongs to the technical field of optical remote sensing imaging, and relates to a spherical focal plane-based sub viewing field step gaze imaging optical system. The system aims to solve the problem of defocusing produced by sub viewing field step directing in a converging light path. A unique spherical focal plane form is adopted in the main optical system, a planar directing mirror is arranged in the converging light path, and the distance between the directing mirror and a main optical focal plane is accordant with the curvature radius of the spherical focal plane so as to avoid the problem of defocusing produced due to the motion of the directing mirror in the converging light path; and different sub viewing fields in a full viewing field are introduced into a subsequent imaging light path one by one by two-dimensional step directing of the directing mirror, the imaging light path is divided into different channels by a light splitting assembly, and a correction lens set of each imaging channel finishes focal length control and field curvature equal aberration correction to match the scale of a detection device in each channel and realize a flat image field required by the detection device. The system breaks through the technical bottleneck that the scale of a surface array detector in large surface array gaze imaging application is limited, and realizes scanning coverage of the full viewing field by using a small surface array detector.

The invention discloses a method for focusing a camera image in a digital slice scanner, comprising the following steps: step 1, obtaining a navigation preview image of the slice and performing identification to obtain a scanning area; step 2, dividing the scanning area to obtain all scanning fields of view; step 3. Select the focus field of view and the coarse focus field of view; step 4, focus on the coarse focus field of view; step 5, extend the focus of the field of view from the coarse focus field of view to the focus field of view; step 6, perform fine focus on the focus field of view; step 7, follow How far the field of view is from the focused field of view sets all field of view focus values. The method has a fast stepping focusing speed and can accurately find the image focus, is used in a fully automatic digital pathological scanner, and solves the problem of image out-of-focus in the existing camera image focusing technology.

The present invention relates to the field of LED display technology, and specifically discloses a method for collecting corrected images of LED screens, a correction method, a collection device and a correction system. The collection method includes calculating the target collection width and height range of the camera; The target collects the width and height range and the preset light point interval strategy to generate several light point lighting schemes; generates corresponding display control information and shooting control information according to each light point lighting scheme; and obtains the camera under different shooting control information Steps such as correcting images taken by LED display screens under different display control information. The invention obtains as few corrected images as possible on the basis of meeting the data accuracy requirements, improves the image acquisition efficiency, and the obtained corrected images can be covered with CMOS pixels as much as possible, which solves the problem of out-of-focus and distortion around the corrected images in the prior art Problems, to ensure the subsequent correction of the LED display.

The present application discloses a focus tracking method and related equipment, which are applied to electronic equipment including an eye tracking module and a focus tracking module. The method includes: displaying a camera preview image, the camera preview image including at least one target to be shot; The eye tracking module determines the gaze position of the user gazing at the camera preview screen; determines a focus tracking target based on the gaze position, and the at least one target to be shot includes the focus tracking target; Focus tracking on the target for focus tracking. By adopting the embodiments of the present application, the problem of out-of-focus during the imaging process can be solved, and the imaging quality can be improved.