226 results about "Flat lens" patented technology

A folded lens system may include multiple lenses with refractive power and a light path folding element. Light entering the camera through lens(es) on a first optical path or axis is refracted to the folding element, which changes direction of the light onto a second optical path or axis with lens(es) that refract the light to form an image plane at a photosensor. At least one of the object side and image side surfaces of at least one of the lens elements may be aspheric. Total track length (TTL) of the lens system may be 16.0 mm or less. The lens system may be configured so that the telephoto ration |TTL / f| is greater than 1.0. Materials, radii of curvature, shapes, sizes, spacing, and aspheric coefficients of the optical elements may be selected to achieve quality optical performance and high image resolution in a small form factor camera.

A lamp structure has a slim light emitting source including at least one LED packaged on a multilayered printed circuit board type aluminum base. A funnel-shaped reflector is concaved toward a center thereof and defined with at least one hole for partially accommodating the LED. An inner surface of the reflector is coated to form a light reflecting surface. A flat lens includes a surface being treated with sand blast. A lamp housing has a receiving chamber for accommodation of the slim light emitting source, the reflector, the flat lens, and a driver. The lamp housing is formed with a plurality of heat dissipation fins. The driver is inserted in the other end of the receiving chamber of the lamp housing and has positive and negative leads connected to the slim light emitting source for enabling it to produce light.

A tunable super-lens (TSL) for nanoscale optical sensing and imaging of bio-molecules and nano-manufacturing utilizes negative-index materials (NIMs) that operate in the visible or near infrared light. The NIMs can create a lens that will perform sub-wavelength imaging, enhanced resolution imaging, or flat lens imaging. This new TSL covers two different operation scales. For short distances between the object and its image, a near-field super-lens (NFSL) can create or enhance images of objects located at distances much less than the wavelength of light. For the far-zone, negative values are necessary for both the permittivity ε a permeability μ. While well-structured periodic meta-materials, which require delicate design and precise fabrication, can be used, metal-dielectric composites are also candidates for NIMs in the optical range. The negative-refraction in the composite films can be made by using frequency-selective photomodification.

A planar lenses for integrated optics applications, in particular for use in optical touch screen sensors are disclosed. The disclosed planar lenses include a slab waveguide and an optical waveguide, preferably formed in unitary fashion, wherein the slab waveguide has a curved end face to focus light into or out of the optical waveguide, and wherein at least one additional lens is included within the slab waveguide. In one aspect of this disclosure, the additional lens is a diverging lens. In a second aspect the additional lens is a converging lens. The additional lens may match the acceptance angle of the optical waveguide to the curved end face of the slab waveguide. Alternatively, it may improve the tolerance of the planar lens to design or assembly errors and / or temperature variations. Preferably, the planar lenses are composed of a photo-patternable polymer, and the additional lenses are composed of air.

The invention discloses an annular aperture ultrathin optical imaging system which can be used for a portable small-scale camera, a mobile phone lens or other civil optical imaging systems. The annular aperture ultrathin optical imaging system comprises a flat lens and a compensator; and the clear aperture is annular. The front surface of the flat lens is a plane reflector, while the rear surface has four coaxial annular high-order aspheric reflectors on the same substrate; and air is adopted as a light transmission medium. The system can obviously reduce the size and the weight while keeping good imaging quality and provide an effective method for improving a conventional refraction system. Compared with a common small-scale lens, the lens has the characteristics of good imaging quality, large numerical aperture, simple assembly and adjustment, low cost, portability, easy processing, suitability for large-batch production and the like.

The planar lens of the invention having a flat glass substrate, in which a refractive index distribution is formed by diffusing a refractive index-increasing component into the flat glass substrate in a substantially hemispherical form or semicylinder form, wherein the refractive index-increasing component is silver, and the flat glass substrate comprises Li as an alkali metal that is subject to an ion exchange with the silver.

An imaging lens (LN) includes at least one lens block (BK), and an aperture stop (ape). The lens block (BK) includes parallel flat lens substrates (LS) formed of different materials, and a lens (L). In the imaging lens (LN), a first lens block (BK1) positioned closest to an object includes a first lens substrate (LS1) and a lens (L[LS1o], and a prescribed conditional expression is satisfied.

The invention provides a single-line multi-row equivalent negative refractive index flat lens, which comprises a pair of glass windows with two optical surfaces and two groups of light waveguide arrays positioned between the two glass windows, wherein the optical waveguide array is formed by single-line multi-row light waveguides being in 45-degree inclined arrangement and having the rectangular cross section; the waveguide directions of the mutually corresponding parts of the two groups of light waveguide arrays are vertical to each other. Through the reconstructed plane lens of the special precise microscopic structure, the single-line multi-row light waveguides with the rectangular cross section are used for forming an array structure; two-dimensional or three-dimensional light sourcesdirectly form solid images in the air to realize the real holographic image.

An imaging lens (LN) includes at least one lens block (BK), and an aperture stop (ape). The lens block (BK) includes parallel flat lens substrates (LS) formed of different materials, and a lens (L). In the imaging lens (LN), a first lens block (BK1) positioned closest to an object includes a first lens substrate (LS1) and a lens (L[LS1o], and a prescribed conditional expression is satisfied.

The invention discloses a point focusing flat lens antenna. The point focusing flat lens antenna comprises a shell which has an opening on one side, a feed source and a meta-material flat lens which is used to seal the shell opening. The meta-material flat lens comprises a first flat lens and a second flat lens, wherein the first flat lens is close to the feed source and the second flat lens fits the first flat lens. Through designing refractive index distribution of the first flat lens and the second flat lens, electromagnetic waves emitted by the feed source can be gathered into one point. According to the point focusing flat lens antenna of the invention, a traditional lens part is replaced by the meta-material flat lens; a curved surface with a complex processing shape and high precision requirement does not needed; manufacturing and processing are easy and cost is low.

Planar lenses for integrated optics applications, in particular for use in optical touch screen sensors are disclosed. The disclosed planar lenses include a slab waveguide and an optical waveguide, preferably formed in unitary fashion, wherein the slab waveguide has a curved end face to focus light into or out of the optical waveguide, and wherein at least one additional lens is included within the slab waveguide. In one aspect of this disclosure, the additional lens is a diverging lens. In a second aspect the additional lens is a converging lens. The additional lens may match the acceptance angle of the optical waveguide to the curved end face of the slab waveguide. Alternatively, it may improve the tolerance of the planar lens to design or assembly errors and / or temperature variations. Preferably, the planar lenses are composed of a photo-patternable polymer, and the additional lenses are composed of air.

A planar lens capable of compensating for chromatic aberration and which is easy to manufacture and enables easy assembling of optical pickups and a method for fabricating the planar lens are provided. The planar lens includes a transparent substrate with a lens cavity in a surface of the transparent substrate, and a lens element formed in the lens cavity with a first refracting surface in contact with the bottom of the lens cavity and a second diffracting surface having a diffraction grating opposite to the first refracting surface.

Planar lenses and reflectors are described comprising subwavelength high-contrast gratings (HCG) having high index of refraction grating elements spaced apart from one another in straight and / or curved segments and surrounded by low index material. The high-contrast grating is configured to receive an incident wave which excites multiple modes within the high-contrast grating and is focused for reflection and / or transmission by said high contrast grating. The width of the high contrast grating bars vary along a distribution direction of the grating bars which is perpendicular to the length of the grating bars and / or varies along the length of one or more grating bars to focus said reflection and / or transmission. The HCG is configured to provide double focusing, whose use is exemplified within a vertical cavity surface emitting laser (VCSEL) structure using focusing HCG structures for both the top and bottom mirrors.

The invention provides a multi-row multi-column equivalent negative refractive index flat lens comprising a pair of glass windows respectively having two optical surfaces, and an optical waveguide assembly arranged between the two glass windows; the optical waveguide assembly comprises a multi-row multi-column rectangular optical waveguide array obliquely arranged in 45 degrees, and an edge optical waveguide arranged on the periphery of the rectangular optical waveguide array; single rectangular optical waveguides in each row and / or column of the rectangular optical waveguide array are same insizes. The flat lens is reconstructed by special precision microstructures; the multi-row multi-column rectangular optical waveguide array and the peripheral triangle optical waveguide enable two-dimension or three dimensional light sources to directly realize true holographic image in the air in real images.

The invention discloses a measurement system and a measurement method for measuring the height of the surface of a micro object on the basis of a digital fringe projection technology. The measurement method comprises the following steps of: firstly, constructing a three-dimensional measurement system, wherein the three-dimensional measurement system comprises a working platform, a television microscope lens, a lens assembly and a mini projector, the television microscope lens is vertical to the working platform to be placed downward; a lens of the mini projector is downward and is placed on the same plane with the television microscope lens, the lens assembly is arranged in front of the lens of the mini projector and is used for focusing a sine fringe image projected by the mini projector and the object to be measured is placed on the working platform; and carrying out calibration on the three-dimensional measurement system to obtain a final phase of the surface of the object to be measured so as to obtain the height of the surface of the object to be measured. According to the invention, the height condition of the surface of the object to be measured is accurately obtained; the measurement system and the measurement method have high utilizing value and high accuracy, is convenient to measure and install and has low cost; and a measurement result is specifically shown in Figure 3 and Figure 4.

The present invention relates to different embodiments of lighting fixtures, such as high bay lighting fixtures, comprising one or more improved features. Some of these features include the direct mounting of emitters on a heat sink and / or the use of a template-like board for providing an electrical connection between emitters. These features can improve heat dissipation from the emitters and simplify fabrication. In other embodiments, expensive lens optics of prior art SSL fixtures can be replaced with a flat lens and reflector in order to produce a fixture having a satisfactory spacing criterion.

The invention relates to a method for separating and picking up flat lenses, and a device thereof, which are used for solving the separation and pickup problems of the flat lenses in the production process of filter-type flat lenses through a rectangular rolling circle method. The method makes flat lenses on the uppermost layer of a lens tube exceeding the position of outlet plane of the upper end of the lens tube, provides vacuum suction force so as to pick up and fix the flat lenses, simultaneously enables the flat lens to shift horizontally; and the device comprises a lens electing device, a lens pickup device and a lens horizontal shifting device.

An in-line regulator for dynamic coaxial regulating of main laser beam from laser system and space filter is disclosed. The main laser beam emitted by laser system sequentially passes compensating lens, polarizing plate, polarization analyzer, self-collimating planar lens and space filter to full-reflector, then is reflected through space filter and self-collinating planar lens to the polarization analyzer, then it is turned by 45 deg, and finally passes through attenuator, imaging object lens, orifice light diaphragm and microscopic object lens to detector connected with display.

The invention provides a planar lens unit based on dielectric material, a planar lens and a preparation method. The unit comprises an antenna made of dielectric material with high refractivity, a silica filling layer, a silver mirror and a silica substrate. The planar lens comprises the planar lens units distributed about the center, and the antennas of the planar lens units are distributed on the axis X regularly and are distributed symmetric about the axis y when y equals to zero. The method includes firstly, covering the silica substrate with a layer of silver film, and covering the surface of the silver film with the filling layer of silica and a silicon film through electron beam vapor deposition continuously; secondly, coating the silicon film with photoresist, and completing the etching and developing of the photoresist by the electron beam exposure technology; thirdly, etching the silicon film by the reactive ion beam etching technology; fourthly, performing peeling to obtain the finished nano silicon antenna. Thus, the focusing efficiency can be improved by one order of magnitude, and the high practical application value is provided.

Apparatus for determining if a cornea (whether in vitro or in vivo) has been modified (either surgically or otherwise). The method includes the steps of: passing a beam of collimated light a (either coherent or incoherent) through the cornea to produce a distorted wavefront; determining the characteristics of the distorted wavefront; and analyzing the distorted wavefront for characteristics that identify the presence of a modification. The analysis of the distorted wavefront can be for the presence of higher order aberrations, or Gausian characteristics which are indicative of modifications. More particularly, the method includes the steps of providing an optical system that has a pupil plane and an image plane at a detector; positioning the cornea in the pupil plane; passing a collimated beam of light through the cornea to produce at least two images in the image plane; determining the characteristics of the distorted wavefront; and analyzing the distorted wavefront for characteristics that identify the presence of a modification. The apparatus includes: a source of collimated light: an optical system including a distorted grating and an imaging lens (which have a pupil plane, first and second virtual planes, and an image plane); structure for positioning the cornea in the pupil plane; and a computer. The structure for positioning the cornea (which is immersed in a suitable storage fluid) includes first and second plano / plano lenses. The first and second plano lens, which are substantially and perpendicular to and centered with respect to the axis, have less than λ / 10 total distortions.

A zoom lens includes: a front group including a plurality of movable lens groups; and a rear group that is provided on an image side of the front group and that includes a negative lens and a positive lens. The positive lens has a flat lens surface on its image side, and is tiltable about a spherical center of its object side lens surface that is convex on the object side. When a lens system is inclined, the positive lens is tilted in relation to the optical axis of the lens system based on: a focal length of the overall lens system; an angle of the optical axis of the lens system after being inclined in relation to the optical axis before being inclined; a distance between the image side lens surface of the positive lens and the image plane; and a refractive index of the positive lens.

The invention discloses a topping curved surface condensing lens and a manufacturing method thereof. The manufacturing method comprises the following steps: firstly, casting a mold to form a topping hollow curved surface cone, and forming a topping hollow curved surface Fresnel lens in the topping hollow curved surface cone; and secondly, adhering and fixing a planar lens having the same size as a topping area to the topping area of the topping hollow curved surface Fresnel lens to form the topping curved surface condensing lens. The planar lens is a convex lens or a planar Fresnel lens. The topping curved surface condensing lens manufactured according to the method not only has the optical advantages of a curved surface Fresnel lens, but also has the advantages of the planar Fresnel lens which is simpler and easier than the curved surface Fresnel lens in processing, so the performance price ratio of the lens is greatly improved.

Disclosed herein is a plane lens sheet using a light transmission rate difference, which is used for stereoscopic printing for a lenticular system and an integral photography method and has a plane surface while innumerable lenses are arranged on the surface there so that it looks like a flat transparent sheet, improves the quality of stereoscopic products employing the lens sheet and facilitates the maintenance of the stereoscopic products. The plane lens sheet includes: a concave lens layer 20 and a convex lens layer 30 laminated on each other in such a manner as the adhere to each other with the same radius curvature to form a superposed lens sheet, the concave lens layer 20 and the convex lens layer 30 being made of a transparent synthetic resin and having the same lens pitch and different light transmission rates; a thin flat transparent upper protection layer 10 formed on the concave lens layer 20; a transparent layer 50 formed below the convex lens layer 30 for forming the focal length of the laminated concave lens layer and convex lens layer; and a thin flat transparent lower protection layer 70 formed below the transparent layer 50.

A tunable super-lens (TSL) for nanoscale optical sensing and imaging of bio-molecules and nano-manufacturing utilizes negative-index materials (NIMs) that operate in the visible or near infrared light. The NIMs can create a lens that will perform sub-wavelength imaging, enhanced resolution imaging, or flat lens imaging. This new TSL covers two different operation scales. For short distances between the object and its image, a near-field super-lens (NFSL) can create or enhance images of objects located at distances much less than the wavelength of light. For the far-zone, negative values are necessary for both the permittivity ∈ a permeability μ. While well-structured periodic meta-materials, which require delicate design and precise fabrication, can be used, metal-dielectric composites are also candidates for NIMs in the optical range. The negative-refraction in the composite films can be made by using frequency-selective photomodification.

A planar lens capable of compensating for chromatic aberration and which is easy to manufacture and enables easy assembling of optical pickups and a method for fabricating the planar lens are provided. The planar lens includes a transparent substrate with a lens cavity in a surface of the transparent substrate, and a lens element formed in the lens cavity with a first refracting surface in contact with the bottom of the lens cavity and a second diffracting surface having a diffraction grating opposite to the first refracting surface.

The present invention has an object, in a near-field optical probe having a microscopic aperture to generate and / or scatter a near field, to obtain a near-field optical probe easy to be made in an array which increases the intensity of a near field to be generated and / or scattered and is adapted for use as an optical memory head.This near-field optical probe is arranged with a planar lens having microscopic lens on a flat surface substrate having an inverted conical or pyramidal hole formed therethrough such that its apex is made as the microscopic aperture, wherein a light source is further arranged thereon to introduce light to the planar lens. Because the arrangement is made such that the planar lens has a focal point positioned at the microscopic aperture, the light given by the light source can be efficiently collected to the microscopic aperture. Also, the above structure can be arrayed and mass produced using a silicon process, thus being adapted for use as an optical memory head.

The invention discloses an electric control zooming plane lens which comprises a first electric control zooming liquid crystal lens, a second electric control zooming liquid crystal lens and a super lens with a fixed focal length which are cascaded. In a state of not applying an electric field, the arrangement direction of molecules in the first liquid crystal layer of the first liquid crystal lens is parallel to the overall mirror surface direction of the first liquid crystal lens, the arrangement direction of the molecules in the second liquid crystal layer of the second liquid crystal lensis parallel to the overall mirror surface direction of the second liquid crystal lens, and the arrangement directions of the molecules in the first liquid crystal layer and the molecules in the secondliquid crystal layer are perpendicular to each other. The electric field is applied to the first liquid crystal layer and the second liquid crystal layer respectively, and the molecular arrangement state of the first liquid crystal layer and the second liquid crystal layer is adjusted by adjusting the electric field intensity. The plane lens is the super lens with a fixed focal length. The planarlens group has an electric control zooming function and is insensitive to polarization based on the combination of the liquid crystal lens and the super lens which are arranged in a cascaded manner,a high-quality imaging effect is achieved and the practical application of the planar lens technology is promoted.

The invention provides a non-chromatic-dispersion infrared gas sensor capable of lowering detection lower limit. The sensor comprises an infrared transmitter, a first transmission window, an air chamber, a second transmission window, an infrared sensor and a control module, and the first transmission window and the second transmission window are arranged to be identical or different planar lenses, convex lenses, concave lenses or Fresnel lenses; the infrared detector comprises at least one reference channel and at least one measurement channel group, each measurement channel group comprises at least two measurement channels for detecting same predetermined gas, a plurality of light filters are arranged between the reference channels as well as the measurement channels and the second transmission window, and the light filters adopted by each measurement channel in a same measurement channel group are uniform in specification. By adopting the non-chromatic-dispersion infrared gas sensor and a detection method, collection amount of current signals or voltage signals within unit time is increased effectively, gas concentration detection lower limit is lowered, and resolution is improved.