14 results about "Normal lens" patented technology

The utility model discloses a wavefront debugging and detecting device for a laser beam-expanding lens, which is used for debugging and detecting a laser beam-expanding lens to be detected and comprises a laser light source part, a standard laser beam-expanding lens, a pinhole diaphragm and a shearing interferometer which are sequentially arranged and are coaxial at equal height, and the laser beam-expanding lens to be detected is arranged between the pinhole diaphragm and the shearing interferometer. The laser light source part is used as a standard laser light source, the standard laser beam expanding lens is used for expanding the standard laser light source to an entrance pupil size matched with that of the laser beam expanding lens to be measured, and the small-hole diaphragm is used for limiting the spot diameter of the standard laser light source entering the laser beam expanding lens to be measured; and the shearing interferometer is used for testing the wavefront of the standard laser light source after passing through the to-be-tested laser beam expanding lens. According to the utility model, the laser light source piece, the standard lens and the shearing interferometer are utilized, the wavefront debugging precision is improved, and the wavefront aberration is reduced by observing interference fringes in real time and finely adjusting the lens and guiding lens installation and stress release, so that the problem that the beam expanding multiple is reduced is solved.

The invention relates to the technical field of lens machining and polishing, and discloses a multi-station polishing device for vehicle-mounted camera lens machining, which comprises a supporting table, a rotary table is movably mounted above the supporting table, and a coarse grinding assembly, a fine grinding assembly and a polishing assembly are sequentially mounted in the circumferential direction of the outer side of the rotary table; a plurality of fixing seats are arranged on the upper end face of the rotary table at equal intervals, positioning assemblies used for fixing a vehicle-mounted camera lens are installed on the upper end faces of the fixing seats, a first driving cavity and a second driving cavity are formed in the supporting table, and a rotating mechanism used for driving the rotary table to rotate is installed in the first driving cavity. In the machining process, the positions, below the coarse grinding assembly, the fine grinding assembly and the polishing assembly, of the rotary table can be supported, and the situation that pressure is generated on the lens below in the machining process, consequently, the rotary table is uneven in stress and runs for a long time, and finally the rotary table inclines to a certain degree, and normal lens machining operation is affected is avoided. And the service life of the turntable is prolonged.

The invention discloses a prediction model training method, device and equipment and a lens information prediction method, device and equipment, and belongs to the technical field of computers. The prediction model training method comprises the steps that sample coordinate information, sample scene information and first standard shot information are acquired, the sample scene information is used for describing a sample scene corresponding to the sample coordinate information, and the first standard shot information is used for rendering to obtain a video which comprises the sample scene and has a reference rendering style; calling an initial prediction model to predict sample shot information based on the sample coordinate information and the sample scene information; and on the basis of the difference between the sample shot information and the first standard shot information, updating model parameters of the initial prediction model to obtain a target prediction model. On the basis, the reliability of the shot information obtained through prediction and the training reliability of the prediction model can be improved, the prediction accuracy of the shot information can also be improved, and then the reliability of the video obtained through rendering according to the shot information obtained through prediction is improved.

The invention relates to a method for measuring the surface type of a lens by using long-wave infrared band interference. The method comprises the following steps: acquiring a long-wave infrared interferometer which is adjusted in advance; the long-wave infrared interferometer emits a long-wave infrared light beam, the long-wave infrared light beam is reflected by the standard lens and the to-be-measured lens to form interference fringes, the to-be-measured lens is a milled lens, and the surface of the to-be-measured lens is a rough surface; and obtaining surface type data of the to-be-detected lens according to interference fringe analysis. The invention also relates to a system for measuring the surface type of the lens by using the long-wave infrared band interference. The method has the beneficial effects that the strong penetrability of long-wave infrared light is utilized, the long-wave infrared light can penetrate through the surface microstructure of the rough lens, the scattering interference is reduced, more reflected light participates in interference, the surface roughness can be analyzed more stably, the measurement time of the lens surface type is shortened, and the subsequent processing procedure can be carried out more timely.

The embodiment of the invention discloses a full-frame standard lens which comprises a first lens group, a diaphragm, a second lens group, a third lens group and a fourth lens group, the focal powers of the first lens group, the diaphragm, the second lens group, the third lens group and the fourth lens group are respectively positive / negative, positive, negative and positive, the first lens group, the second lens group and the fourth lens group are fixed groups, and the third lens group is a focusing group; the first lens group comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens of which the focal powers are positive, negative, negative, negative, positive, negative and positive; the second lens group comprises an eighth lens with positive focal power; the third lens group comprises a ninth lens with negative focal power and a tenth lens with positive focal power; and the fourth lens group comprises an eleventh lens, a twelfth lens, a thirteenth lens and a fourteenth lens with positive focal power, positive focal power, negative focal power and positive focal power. According to the embodiment of the invention, the full-frame standard lens which is full-glass, large in aperture, low in distortion, high in resolution and low in chromatic aberration is realized, and the full-frame standard lens has a relatively wide market application prospect.

The invention discloses a design method of a split type optical lens. The design method comprises the following steps: constructing a database containing a standardized performance parameter set of a calibrated standard lens; inputting a target lens optical design index; a standard lens meeting the target lens optical design index is called from the standard component database, a front lens assembly of the standard lens serves as a standard component A, and a rear lens assembly of the standard lens serves as a standard component B; reversely calculating optical correction parameters of the rear lens group and the front lens group based on the called measured aberration data of the standard component A and the standard component B; and generating a combination scheme containing the front lens assembly and the rear lens assembly in the target lens, and outputting matching parameters of mechanical contact surfaces of the front lens assembly and the rear lens assembly. According to the design method, the standard component database is established, the standard components are reused for optical lens design, the design period is remarkably shortened, and the lens imaging quality is improved.

The application discloses a compact visible wide-angle athermalization lens, which comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens in sequence along the direction of light path propagation; the first lens is a negative meniscus plastic lens, both surfaces of which are even aspheric surfaces; the second lens is a positive meniscus plastic lens, both surfaces of which are even aspheric surfaces; the third lens is a positive diopter glass lens, both surfaces of which are standard spherical surfaces; the fourth lens is a negative diopter plastic lens, both surfaces of which are even aspheric surfaces; and the fifth lens is a positive diopter plastic lens, both surfaces of which are even aspheric surfaces. The lens is short in length and light in weight, and belongs to a wide-angle lens between a standard lens and a fisheye lens in terms of field of view and focal length; the lens can keep the image plane stable within a temperature difference range of -20 degrees to 60 degrees without focusing adjustment, and the pictures in daytime and at night have good co-focusing property, so that the lens can meet the needs of the current market for monitoring lenses.

The application discloses an optical lens, an assembling method thereof and a camera module. The assembling method comprises the following steps: (a) allowing an upper lens group, a standard lens group and a lower lens group to be arranged approximately along an optical axis; (b) calibrating the upper lens group, the standard lens group and the lower lens group; (c) allowing a focusing lens group to replace the standard lens group; and (d) assembling the upper lens group, the focusing lens group and the lower lens group to obtain the optical lens. In this way, the optical lens can be calibrated under high threshold performance, so that the optical performance of the optical lens is ensured.

The invention discloses a standard spherical lens with an ultra-large relative aperture. The standard spherical lens sequentially comprises a diaphragm, a first lens, a second lens, a third lens and a fourth lens from an infinite object space to an image space along an optical axis. And the four lenses are spherical single lenses made of a glass material with a high refractive index coefficient. The spherical standard lens is matched with a laser interferometer and is used for high-precision detection of the spherical surface shape. The relative aperture D / f of the lens is larger than or equal to 2.75, Fno is smaller than or equal to 0.365, the light wave convergence angle is 2U'gt, 156 degrees, the focusing light spot is far smaller than the diffraction Airy spot, high-precision detection of the concave spherical surface shape with the ratio of the half aperture to the curvature radius close to 1 can be achieved, the lens structure is simple and compact, the imaging quality is ensured, and meanwhile the design and machining difficulty of each lens is low.

The application discloses a home theater optical anamorphic wide screen lens, which comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens in sequence from an object side, wherein the first lens is a concave object side cylindrical negative lens, the second lens is a convex object side cylindrical meniscus negative lens, the third lens is a convex object side cylindrical positive lens, the fourth lens is a concave object side cylindrical negative lens, the fifth lens is a convex object side cylindrical positive lens, and the sixth lens is a convex object side cylindrical positive lens; and the first lens to the sixth lens are all made of glass material. The home theater optical anamorphic wide screen lens is a standard lens, the lenses are all designed as cylindrical lenses to correct various aberrations, and the lenses are all made of glass material, so that the quality of the lenses and the definition of the lens are improved.

The invention discloses a polarizing film switching device capable of finely adjusting an angle, and solves the problem that an existing angle modulation method can only realize imaging of a plurality of specific polarization angles or is tedious in operation. The device specifically comprises a support with a light through hole, a rotating shaft vertically arranged on the side wall of the support, a target wheel rotatably sleeving the rotating shaft, four polarization assemblies and a normal lens which are distributed on the target wheel in the circumferential direction and are the same in size, and a first driving assembly and a second driving assembly which are arranged on the support. The end face of the target wheel is parallel to the side wall of the support, and a gap is formed between the target wheel and the support. The acting end of the first driving assembly is connected with the four polarization assemblies and used for driving the four polarization assemblies to rotate at the same time. The acting end of the second driving assembly is connected with the target wheel and used for driving the target wheel to rotate so as to switch any polarization assembly or normal lens to correspond to the light passing hole.

The application discloses a device for quickly adjusting an optical element at multiple angles, which comprises a laser interferometer, an interferometer standard lens, a zero compensation mirror and a first adjusting mechanism; a rotating turntable is installed on the first adjusting mechanism, a second adjusting mechanism is installed on the rotating turntable, a third adjusting and detecting support platform is further installed on the second adjusting mechanism, and a detected optical element is arranged on the third adjusting and detecting support platform; the adjusting amount of each adjusting mechanism can be quickly calculated through a sensitivity matrix, so that the spatial position of each adjusting mechanism and the detected optical element can be quickly adjusted, the adjusting time is greatly saved, the adjusting difficulty is reduced, and the adjustment precision is higher through the coefficients of Zernike second, third, seventh and eighth items.

The invention provides an optical lens surface defect detection method and system. The method comprises the following steps: acquiring a corresponding multi-polarization-state image group through an industrial camera; generating a self-adaptive texture mask matched with the normal texture of the lens through a deep learning network based on the image features, and synchronously performing gray level layering processing on the multi-polarization-state image group according to the self-adaptive texture mask to generate a corresponding target polarization-state image; calculating polarization and gray features of pixels of the target polarization state image, performing synchronous fusion to construct a corresponding feature set, and performing clustering processing on the feature set by adopting a density peak clustering algorithm so as to obtain an initial defect candidate area through threshold value screening; and extracting multi-dimensional feature parameters of the initial defect candidate region to construct a corresponding feature verification library, and removing the stain edge and the pseudo-defect region of the initial defect candidate region through the feature verification library to detect a corresponding target defect region. The detection efficiency can be effectively improved.

The invention provides an equivalent 60mm standard lens. The equivalent 60mm standard lens consists of a diaphragm, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and plate glass in sequence from an object side surface to an image surface, the first lens is set to be a positive focal power lens, the second lens is set to be a negative focal power lens, the third lens is set to be a negative focal power lens, the fourth lens is set to be a negative focal power lens, the fifth lens is set to be a positive focal power lens, and the sixth lens is set to be a positive focal power lens; the first lens and the second lens meet the conditional expressions that phi 1 + phi 3 is larger than or equal to 0.072 and phi 1 / phi 3 is larger than or equal to 0.319, phi 1 represents the focal power of the first lens, and phi 3 represents the focal power of the third lens. The large field angle and the low optical distortion are considered, and meanwhile the characteristics of light weight and miniaturization are achieved.