9results about How to "Image stabilization" patented technology

The invention discloses a prime lens and a camera, and relates to the technical field of prime lenses, the prime lens is provided with an object side and an image side which are oppositely arranged along the optical axis direction, the prime lens comprises a first lens group, a second lens group, a third lens group and a fourth lens group which are sequentially arranged from the object side to the image side, and the four lens groups comprise eleven lenses, the first lens, the fourth lens, the seventh lens, the eighth lens and the tenth lens have positive focal power; the second lens, the third lens, the fifth lens, the sixth lens, the ninth lens and the eleventh lens have negative focal power; wherein the third lens group is movably arranged along the extension direction of the optical axis and is used for focusing, so that the aperture number of the prime lens is adjustable in a range of 1.6-2.0, the variation range of a field angle is less than 5%, and the distortion degree of the prime lens is less than 3%. According to the technical scheme provided by the invention, the technical effects of large aperture and stable imaging are achieved through the arrangement and combination of the eleven lenses and the design of the lenses.

This utility model relates to the field of medical device technology, and in particular to an intraoral scanning mounting structure and an intraoral scanning device. The intraoral scanning mounting structure includes: a housing with a mounting position, on which a protrusion is provided; an electro-optical component is mounted on the mounting position, and a groove is formed on the circumferential edge of the electro-optical component for the protrusion to extend into, thereby positioning the electro-optical component; an elastic component includes a first elastic member and a second elastic member, which are independently provided. The first elastic member is clamped between the mounting position and a first wall of the electro-optical component, and the second elastic member is clamped between the mounting position and a second wall of the electro-optical component, thus satisfying the installation and fixing requirements while allowing the electro-optical component to move within the mounting position due to thermal expansion and contraction; in the circumferential direction of the electro-optical component, a groove is provided between the portion of the first wall that abuts against the first elastic member and the portion of the second wall that abuts against the second elastic member, thereby ensuring the installation accuracy requirements of the electro-optical component.

The invention discloses a wide-temperature long-wave infrared coaxial four-mirror optical lens for space tiny dark and weak target detection, and solves the problems that an existing optical lens for space tiny dark and weak targets is large in size, high in weight and poor in temperature adaptability. The first reflecting mirror, the second reflecting mirror, the third reflecting mirror and the fourth reflecting mirror are sequentially and coaxially arranged from a light incident end to a light emergent end; the reflecting surfaces of the first reflecting mirror and the second reflecting mirror are oppositely arranged, and the reflecting surfaces of the third reflecting mirror and the fourth reflecting mirror are oppositely arranged; light through holes are formed in the centers of the second reflector, the third reflector and the fourth reflector; the second reflector is used for receiving incident light and reflecting the incident light to the first reflector, and light beams reflected by the first reflector enter the fourth reflector through light through holes in the centers of the second reflector and the third reflector and are reflected to the third reflector for reflection. And the light beams reflected by the third reflector pass through a light through hole in the center of the fourth reflector and then are converged to a photosensitive receiving surface of an external detector.

The utility model relates to the technical field of vein palmprint identification, in particular to vein palmprint identification equipment, which comprises a main control chip, an infrared light source module, an optical imaging module, a living body detection module, a heat dissipation structure and an anti-counterfeiting processing module. According to the utility model, the structure is novel, infrared light can uniformly irradiate a palm, edge dark areas or center overexposure can be avoided, vein image quality can be improved, ambient light interference can be effectively inhibited, aberration can be reduced, blood vessel edge definition can be improved, and counterfeiting means such as silica gel artificial hands, photos or vein printing can be effectively resisted; the LED working temperature stability is ensured, wavelength drift is avoided, the service life is prolonged, the palm of a user is automatically adjusted to the optimal imaging position, the operation difficulty is reduced, the recognition success rate is improved, stable imaging can be ensured under different illumination conditions, the calculation amount is reduced while the precision is ensured, the recognition efficiency is high, and the energy consumption is low.

The utility model discloses an automobile safe driving DMS optical imaging lens, which relates to the technical field of optical systems and vehicle-mounted imaging devices and sequentially comprises a first lens, a diaphragm, a second lens, a third lens, a fourth lens, an optical filter, protective glass and an image plane from an object plane to an image plane along an optical axis. Wherein the third lens and the fourth lens form a group of glued lenses. The maximum target surface of the DMS optical imaging lens for safe driving of the automobile can reach 7.41 mm, the DMS optical imaging lens can be matched with a 1 / 2.5 chip, the monitoring view field is wider, and a traditional DMS lens is small in target surface and only can be matched with a 1 / 3 chip, and the angle is small; the structure adopts a 2G + 2P structural design, and the product cost is reduced by using a design scheme with high cost performance; the design pixel of the lens reaches 300W, so that the imaging picture quality of the lens is greatly improved; athermalization design is adopted, heat temperature excursion compensation is achieved, the working temperature can range from-40 DEG C to 95 DEG C, and it is guaranteed that the product is applied to complex temperature scenes.

The present application relates to the technical field of optical imaging, and more particularly to a multi-mode terahertz wave imaging system and imaging method, the system comprising a light source module, a mode conversion module, first and second power feedback modules, and a multi-mode imaging module; the mode conversion module is used to convert the light source emitted by the light source module into light sources of different modes, which are then emitted to the multi-mode imaging module for imaging; the first and second power feedback modules are respectively used to capture the light beam energy information of the light source module and the multi-mode imaging module. The method comprises: selecting a light source and an imaging light path; when the selected light source comprises a collimated emitted terahertz wave laser source, the first power feedback module is used to obtain the first power, the second power feedback module is used to obtain the second power, and then normalization is performed; and when the selected light source does not comprise a collimated emitted terahertz wave laser source, the second power feedback module is used to obtain the second power. The present application can achieve wide spectrum coverage, can also perform multi-mode fast switching, and can achieve stable imaging.

The application provides a brake shoe imaging regulation method and system and a storage medium. The method comprises: acquiring a real-time speed of a train; inputting the real-time speed into a preset bogie dynamics model to predict an attitude angle of a target bogie corresponding to a target brake shoe under the real-time speed through the bogie dynamics model, the bogie dynamics model being constructed based on secondary suspension system parameters of a corresponding train model, wheel-rail contact geometric parameters and train dynamics equations; generating a space pose adjustment instruction for an imaging holder based on the attitude angle, the space pose adjustment instruction being used to drive the imaging holder to adjust an optical axis direction to compensate for an imaging plane deflection of the target brake shoe caused by a bogie attitude change; controlling the imaging holder to move according to the space pose adjustment instruction, and controlling a high-speed imaging device on the imaging holder to image the target brake shoe in response to the imaging holder moving to a target pose. The application realizes stable and clear imaging of the brake shoe in a high dynamic scene.

The application discloses a flying point scanning control method and device, and belongs to the technical field of X-ray scanning imaging. The method is realized based on a flying focal point X-ray source and a static constraint device, and comprises the following steps: acquiring scanning control parameters which are independently set for multiple scanning positions, wherein the scanning control parameters comprise scanning time lengths corresponding to the scanning positions, and different scanning positions can be set as different values; and controlling a focal point switching process of the flying focal point X-ray source according to the scanning control parameters to perform flying point scanning. The application is based on pre-identification of a scanning area, different areas adopt different scanning modes, empty areas can be directly skipped, and key areas are strengthened for scanning. The application reduces a radiation dose, improves scanning efficiency, and improves imaging quality of key areas. However, the existing feedback type scheme cannot distinguish empty areas and metal areas (scattering signals are also weak), and is prone to misjudgment and resource waste.