4results about How to "Reduce spot size" patented technology

The present disclosure discloses an image capturing lens assembly including seven lens elements including a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element in order from an object side to an image side along an optical path. Each of the seven lenses has an object-side surface facing the object-side direction and an image-side surface facing the image-side direction. The first lens element has negative refractive power. The fifth lens element has an image-side surface being convex in a paraxial region thereof. The sixth lens element has negative refractive power. The sixth lens element has an object-side surface being concave in a paraxial region thereof. At least one of the object side surface and the image side surface of at least one of the seven lenses has at least one inflection point. When specific conditions are met, the image capturing lens assembly can simultaneously meet the requirements of miniaturization, large viewing angle, low sensitivity and high imaging quality. The invention further discloses an image capturing device with the image capturing lens assembly and an electronic device with the image capturing device.

The application provides a laser radar, which comprises a laser transceiver module, a correction mirror and a window, the laser transceiver module is used for emitting laser and receiving reflected laser, the laser is emitted to a measured object after sequentially passing through the correction mirror and the window, and the reflected laser formed by the measured object is incident to the laser transceiver module after sequentially passing through the window and the correction mirror; wherein the correction mirror and the window constitute a 4f system, and the 4f system is used for reducing the divergence angle and spot size of the laser and reducing the signal amplitude attenuation of the reflected laser. The laser radar provided by the application reduces the divergence angle and spot size of the laser and reduces the signal amplitude attenuation of the reflected laser by constituting a 4f system with the correction mirror and the window, so as to improve the accuracy of the detection result of the laser radar.

The utility model relates to a multi-wavelength laser diode. The multi-wavelength laser diode comprises a plurality of lasers and a beam combining prism which are arranged along a light path, the beam combining prism comprises at least two parallel partial reflection surfaces and a beam combining reflection surface parallel to the partial reflection surfaces; the number of the lasers is equal to that of the partial reflecting surfaces and the lasers and the partial reflecting surfaces are in one-to-one correspondence; and emergent light of the laser is reflected by the partial reflecting surface and then is output after being reflected and combined by the beam combining reflecting surface. According to the utility model, the beam combining prism with an integrated structure is adopted to couple light beams, and a plurality of traditional lens groups are replaced, so that the size and the installation and adjustment difficulty of the module are greatly reduced; the coupling efficiency and consistency of the multi-wavelength optical fiber are improved; smaller space volume and compactness are beneficial to the structural stability and heat dissipation performance of the module; and meanwhile, large-scale automatic production is facilitated.

The application provides a myopia prevention and control lens, and relates to the technical field of optical lenses, comprising a lens piece, wherein the lens piece comprises: a plurality of microlenses, and the plurality of microlenses form a supermicrostructure region; wherein the diameter of the microlenses is 0.6 mm-0.25 mm. Through the small microlens diameter, the light spot of the defocus signal of the microlenses on the retina is smaller than the range that can be recognized by the human eye, so that the imaging quality is improved, and the prevention and control effect is improved.