11 results about "Simple lens" patented technology

The utility model belongs to the field of laser application, and relates to beam shaping of a laser, in particular to a small-divergence-angle laser based on a beam shaping technology. The problems that in the prior art for laser diode collimation, astigmatism of the diode cannot be calibrated through single-lens collimation, and cost is increased due to the fact that fast axis collimation and slow axis collimation need to customize a fast axis collimating lens with a proper focal length are solved. The utility model discloses a small-divergence-angle laser based on a beam shaping technology. A first collimating lens, a fast-axis beam shrinking device and a beam expander are sequentially arranged on an emergent light path of a first laser diode; the light emitting point of the first laser diode is located at the focal point of the first collimating lens, the fast axis beam shrinking device comprises a first cylindrical lens and a second cylindrical lens, and the focal points of the first cylindrical lens and the second cylindrical lens coincide. According to the utility model, the divergence angle of the laser diode is reduced to 0.1 mrad, so that the diameter of a light spot at 500m is less than 100mm, and the actual light spot observed in an experiment is 80mm.

The present invention discloses a miniaturized high-resolution optical system, comprising a lens comprising a first lens group with positive optical power, an effective aperture, a color filter with partial wavelength interception, a second lens group with positive optical power, and an imaging surface, arranged sequentially from the object side. The first lens group comprises a first negative lens, a second positive lens, a third positive lens, and a fourth negative lens, arranged sequentially from the object side. The first negative lens and the second positive lens form a cemented lens, or the third positive lens and the fourth negative lens form a cemented lens. The second lens group comprises a plurality of lenses arranged sequentially, wherein at least two negative lenses are provided among the plurality of lenses, and the lenses in the second lens group form at least one cemented lens group with positive optical power. Through a simple lens structure, spherical aberration, astigmatism, and chromatic aberration are well controlled, thereby achieving high resolution.

The invention discloses an image restoration method for an infrared simple lens imaging system with a wide signal-to-noise ratio range, and belongs to infrared image processing. The method comprises the following steps: S1, collecting a data set of infrared simple lens imaging as a training data set of a restoration model; s2, a Wavelet-ProxNet model is constructed to serve as a restoration model, and the restoration model adopts an asymmetric encoder-decoder structure and comprises an encoder and a decoder; s3, establishing a composite loss function as a constraint, and training the recovery model by using the training data set; and S4, for an image to be restored, generating a restored image by the trained restoration model. The diffraction lens infrared image reconstruction network model and the reconstruction method thereof provided by the invention have the advantages of high reconstruction quality, strong noise generalization and low calculation complexity, and promote practical and lightweight development of a diffraction lens infrared imaging technology.

The utility model provides a multi-layer inclination-angle-adjustable filter wheel device. The multi-layer inclination-angle-adjustable filter wheel device comprises a first-layer filter wheel and a second-layer filter wheel, a second layer of filter wheel; the gear motor drives the filter wheel to rotate; the filter wheel comprises a filter wheel main body which is provided with a plurality of rectangular mounting grooves for mounting optical filters; the light filtering mounting fan blades are mounted in the rectangular mounting grooves through fixing bolts; an optical filter is arranged on the simple lens frame, and the simple lens frame is mounted on the optical filter mounting fan blade; and the optical filter clamping pieces are matched with the optical filter mounting fan blades and fix the simple lens frame through fastening bolts. According to the utility model, inclination angle adjustment of each optical filter is realized through a simple mechanical structure, the measurement effect of AO I free conversion is realized, the structure is compact, the method is simple and easy to operate, and lubrication or replacement of quick-wear parts is not needed.

The application discloses an L-band dielectric lens and a lens antenna for satellite multi-beam communication and belongs to the technical field of communication.The lens designed by the application is a cylindrical flat plate lens and is composed of a plurality of concentric circular ring layers.Each circular ring layer is arranged in a circular ring shape around the center by fan ring structure units of the same configuration, and the dielectric constant of each layer gradually decreases from the center to the edge.Compared with a traditional flat plate lens after optical transformation, the lens can realize miniaturization without complex optical transformation, has a simple structure, the lens thickness can be adjusted at will, and the lens can be quickly prepared by using 3D printing.The fan ring structure unit combining the "Y" shape and the circular perforation shape is used as an equivalent dielectric constant model, so that the dielectric constant is closer to the ideal gradient change, and the lens is closer to the ideal effect, so that the lens can be used in the lens antenna, and the working performance is further improved.

The invention provides methods and apparatus comprising a laser source that uses a single unfocused pulse of a low intensity but high power laser over a large sample area to collect Raman scattered collimated light, which is then Rayleigh filtered and focused using a singlet lens into a stacked fiber bundle connected to a customized spectrograph, which separates the individual spectra from the scattered wavelengths using a hybrid diffraction grating for collection onto spectra-specific sections of an array photodetector to measure spectral intensity and thereby identify one or more compounds in the sample.

The present invention discloses a method and system for measuring the multi-band spatially varying point spread function of a simple lens for computational imaging, belonging to the field of optical technology. A system for measuring the spatially varying point spread function is provided, as well as a specific method for compensating and correcting the measurement results. By measuring an appropriate number of horizontal field-of-view point spread images of a simple lens and performing operations such as interpolation and rotation on them, a full-field-of-view two-dimensional multi-band point spread function array is generated, greatly improving measurement efficiency and accuracy, and contributing to improving the quality of restored images. The method can accurately and quickly measure the point spread function of a simple lens, and can be directly used as input for simple lens deconvolution operations, as well as for evaluating the imaging quality of the lens.

This application proposes multi-beam antenna systems using spherical lens with high isolation between antenna ports and compatible to 2×2, 4×4, 8×8 MIMO transceivers. Several compact multi-band multi-beam solutions (with wideband operation, 40%+, in each band) are achieved by creating dual-band radiators movable on the track around spherical lens and by placing of lower band radiators between spherical lenses. By using of secondary lens for high band radiators, coupling between low band and high band radiators is reduced. Beam tilt range and side lobe suppression are improved by special selection of phase shift and rotational angle of radiators. Resultantly, a wide beam tilt range (0-40 degree) is realized in proposed multi-beam antenna systems. Each beam can be individually tilted. Based on proposed single- and multi-lens antenna solutions, cell coverage improvements and stadium tribune coverage optimization are also achieved, together with interference reduction.

The utility model discloses a simple lens support, and relates to a lens support installed on a mobile phone shell. Comprising a back cover, a lens hole, a support ring, a metal connecting piece, a shaft, a rubber shaft sleeve, a magnet, a metal gasket and a shielding plate, one side of the support ring is connected with one side of the lens hole in the back cover through the metal connecting piece, the shaft and the rubber shaft sleeve, and the other side of the lens hole is matched with the other side of the support ring through the magnet. The metal connecting piece is fixed on one side of the lens hole through the metal gasket and the shielding plate. The riveting structure of the support is simplified, the effects of reducing cost, improving efficiency and optimizing appearance are achieved, and the market prospect is very wide.

The present application relates to blueberry bottle mouth sealing optical nondestructive testing equipment technical field, especially in blueberry bottle mouth sealing optical nondestructive testing device and method;Technical scheme: blueberry bottle mouth sealing optical nondestructive testing device, including optical detection device, installation groove, screw rod, mounting bracket, mounting ring, fresnel lens, screw micrometer, double color laser line light source and rotating motor, the inside both sides of optical detection device are provided with installation groove;Compared with the traditional blueberry bottle mouth sealing optical nondestructive testing device, more single light source or simple lens group is used, it is difficult to cover 360 ° annular area of bottle mouth, leading to insufficient illumination of bottle mouth edge or complex curved surface area, small defects are easy to be missed, the blueberry bottle mouth sealing optical nondestructive testing device is through double color laser line light source cooperation with fresnel lens array, and the multispectral reflection data is synchronously collected, and the wavelength difference is used to enhance the contrast of surface micro mark, and the monochromatic light detection sensitivity is effectively improved.

A beam splitter lens for the production of a multi-beam emitter, the beam splitter lens including at least two simple lenses, each simple lens being able to project a collimated beam from light captured at a focal point defined by the configuration of the lens. Each simple lens is configured so that it possesses its own individual focal point, which is distinct from the focal point of another lens.