11 results about "Refractive lens" patented technology

This application discloses a visible light optical system and a visible light optical lens. The visible light optical system includes a superlens, a first aspherical lens, a second aspherical lens, a third aspherical lens, and a fourth aspherical lens. The first, second, third, and fourth aspherical lenses are arranged sequentially along the optical axis from the object side to the image side. The superlens has a positive optical power. The first aspherical lens has a positive optical power, and both its object-side and image-side surfaces are convex towards the object side. The second aspherical lens has a negative optical power, and both its object-side and image-side surfaces are convex towards the image side. The third aspherical lens has a positive optical power, and both its object-side and image-side surfaces are convex towards the image side. The fourth aspherical lens has a negative optical power. The visible light optical system combines a superlens with a traditional refractive lens, giving it advantages such as low cost, small size, and excellent imaging quality.

The present disclosure pertains to the phakic refractive lenses such as toric lenses, an advanced posterior chamber floating phakic refractive lens (PRL) designed for the correction of severe refractive errors, including myopia, hyperopia, and astigmatism. This innovative lens can reduce or minimize complications commonly associated with traditional phakic intraocular lenses, such as intraocular pressure elevation, cataract formation, and iris pigment dispersion. The phakic refractive lenses such as the toric lenses described herein feature a buoyant, flexible structure with a central aperture to facilitate aqueous humor flow, creating a natural centering force that stabilizes the lens within the pupillary space.

An adjustable gain antenna including an RF emitter configured to emit an RF signal along an emitter axis. A first refractive lens having an optical axis collinear with the emitter axis and a second refractive lens having an optical axis collinear with the emitter axis with the first refractive lens located between the RF emitter and the second refractive lens. A drive mechanism mechanically linked to the first refractive lens and the second refractive lens, wherein the drive mechanism is configured to move the first refractive lens and the second refractive lens longitudinally along the emitter axis to vary a gain of the RF emitter.

The present disclosure provides a kind of anti-glare down lamp.The anti-glare down lamp described above, for installing and fixing in building main body, anti-glare down lamp includes lamp body, light emitting part and anti-glare lampshade assembly;Lamp body is formed with installation groove and the light outlet that is communicated with installation groove, light emitting part is installed in installation groove, and the light emitting end of light emitting part is set towards light outlet;Anti-glare lampshade assembly includes lampshade body, refractive lens and floodlight plate, the inner wall of lampshade body is formed with diffuse reflection layer, lampshade body is located at light outlet, refractive lens is installed at one end of lampshade body adjacent to light emitting part, and refractive lens is used to refract light to the inner wall of lampshade body, and floodlight plate is installed at one end of lampshade body away from light emitting part, to form diffuse reflection cavity together.The anti-glare down lamp described above has good anti-glare effect, to improve the use experience of user.

An optical system is an optical system that forms an image of light from a display panel on a retina when combined with an eyeball, the optical system including: a first refractive lens that collects light from the display panel; and a first diffractive lens provided between the first refractive lens and an image forming position, in which the first diffractive lens is configured such that a phase of light passing through an outer peripheral portion of the first diffractive lens is delayed from a phase of light passing through a central portion of the first diffractive lens.

The utility model provides a kind of beam shaping lens, sequentially arrange including: first lens along optical axis direction from light source to object side surface: the first light source surface of first lens is concave, and the first object side surface of first lens is convex;Second lens, the first light source surface of second lens is plane, and the first object side surface of second lens is convex;Third lens, the first light source surface and the first object side surface of third lens are all plane;Fourth lens, the first light source surface of fourth lens is convex, and the first object side surface of fourth lens is plane;Wherein, first lens is high refractive lens.The beam shaping lens provided by the utility model is placed one by one by using multiple groups of lenses according to appropriate spacing, so that light is refracted to object side surface by first lens, second lens, third lens and fourth lens in turn, the angle of light is expanded, and the uniformity of illumination after shaping is improved, so that the field of view is more clear.

This invention provides a simplified design method for a long-wave infrared optical system based on metasurfaces. The method includes: determining the wavefront phase error based on the actual propagation paths and ideal equal-path reference paths of each ray in the wavefront equiphase surface of a refractive lens; determining the target phase distribution of the metalens based on the wavefront phase error; acquiring the phase modulation characteristics, transmission characteristics, and dispersion response of each metalens unit structure in the long-wave infrared band, and establishing a metalens unit structure response database; based on the target phase distribution of the metalens, traversing the metalens unit structure response database, using transmittance thresholds, phase error thresholds, and aspect ratio thresholds as constraints, screening target unit structures in the long-wave infrared band, and generating the target metalens structure. The optical system designed by this invention can operate with a large relative aperture without sacrificing imaging quality, thus meeting the requirements for high light throughput, large aperture, and wide-spectrum imaging.

An optical system includes a first light folding element (e.g., a prism), a second light folding element (e.g., another prism or a mirror), and a lens system located between the first light folding element and the second light folding element. In some cases, the lens system includes a lens stack having either four or five lens elements with refractive power. The first light folding element redirects light from an object field from a first axis to the lens system on a second axis. The plurality of refractive lens elements in the lens stack refract the light to the second light folding element. The second light folding element redirects the light from the second axis onto a third axis to form an image of the object field at an image plane. The optical system has a 35 mm equivalent focal length within a range of 85 to 160 mm.

This invention belongs to the field of smart glasses technology, specifically relating to a magnetic lens structure for smart glasses. It includes a glasses body and an adjustable nose pad assembly connected to the glasses body. A refractive lens assembly is detachably connected to the nose pad assembly, allowing the refractive lens assembly to move synchronously with the adjustment of the nose pad assembly. By directly mounting the refractive lens assembly to the nose pad assembly, this invention ensures that when the nose pad assembly is adjusted, the refractive lens assembly moves with the nose pad assembly, rather than with the smart glasses body, thus maintaining the interpupillary distance of the refractive lens and improving wearing comfort.

A lens includes a plurality of optical elements arranged along an optical axis. The plurality of optical elements includes, in order from an object side to an image side of the lens: a first refractive lens element, an aperture stop, a second refractive lens element, a third refractive lens element, a fourth refractive lens element, and a fifth refractive lens element. A diameter of the first refractive lens element is less than 50% of a total track length of the of lens.

A hybrid lens assembly that corrects for chromatic aberrations and monochromatic aberrations in passing light. A plurality of refractive lens elements are provided that are fabricated from a common refractive material. The refractive lens elements are shaped and oriented to optically correct for monochromatic aberrations. A metalens is provided. The metalens optically corrects for the chromatic aberrations. The result is a hybrid lens assembly that contains both refractive lenses and a metalens. The result is an overall lens assembly that is apochromatic yet is smaller and easier to produce than assemblies that only use refractive lenses. The metalens also corrects for wavefront errors and focal shifts that result from using refractive lens of only one material type, therein making the use of only one refractive material practical in the manufacture of lens assemblies.