80 results about "Annular aperture" patented technology

A compact and versatile multi-spot inspection imaging system employs an objective for focusing an array of radiation beams to a surface and a second reflective or refractive objective having a large numerical aperture for collecting scattered radiation from the array of illuminated spots. The scattered radiation from each illuminated spot is focused to a corresponding optical fiber channel so that information about a scattering may be conveyed to a corresponding detector in a remote detector array for processing. For patterned surface inspection, a cross-shaped filter is rotated along with the surface to reduce the effects of diffraction by Manhattan geometry. A spatial filter in the shape of an annular aperture may also be employed to reduce scattering from patterns such as arrays on the surface. In another embodiment, different portions of the same objective may be used for focusing the illumination beams onto the surface and for collecting the scattered radiation from the illuminated spots simultaneously. In another embodiment, a one-dimensional array of illumination beams are directed at an oblique angle to the surface to illuminate a line of illuminated spots at an angle to the plane of incidence. Radiation scattered from the spots are collected along directions perpendicular to the line of spots or in a double dark field configuration.

A coupling apparatus having coupling body with a mechanical latch assembly. The mechanical latch assembly includes a modified latch plate. The latch plate defines a main portion having a top end and a bottom end and includes an annular aperture disposed between the top and bottom ends. A lever portion is disposed proximate the top end. The lever portion enables the latch plate to move within a coupling body, so as to operate the mechanical latch assembly in a released position and a latched position. A raised edge is disposed about a portion of the annular aperture. The raised edge is disposed proximate the bottom end and extends radially inward of the inner edge defined by the annular aperture. A pin opening is disposed proximate the bottom end opposite of the lever portion. The pin opening is positioned radially outward from the annular aperture, and defines a separate enclosed edge.

Functional yet decorative luminaires intended to create distinctive environments within specific areas of a space in which one or more luminaires are used, the luminaires of the invention visually tie to architectural elements of the space by providing a customizable glow of color surrounding a typically white light that acts to illuminate the space functionally. A downlighting luminaire configured according to the invention as one example is typically configured to utilize two separate reflectors, usually reflectors having concave reflective surfaces and being mounted concentrically within a housing, an inner reflector directing light centrally through an aperture of the luminaire with the light so directed typically being white light useful for illumination intended to facilitate usual activities within the space. An outer reflector is spaced from the inner reflector with a transparent or translucent disc, such as an acrylic plastic disc, being held between the reflectors, the disc having a colored film adhered preferably to lower surfaces thereof to cause portions of the light emanating from lamping disposed above the disc to be colored by passage through the colored film, the disc being readily removable and replaced with a disc having a different color adhered thereto so that a particular luminaire can be customized as to color selection depending on user choice at any given time. An annulus of glowing, colored light exits the periphery of the luminaire aperture outwardly of the inner cone, the reflective surfaces of the outer reflector directing at least portions of the colored light passing through the disc and colored film through an annular aperture of the luminaire, thereby creating a distinctive appearance of a central, white shaft of light emanating from the inner reflector and a glowing annulus of colored light surrounding the white shaft of light. Peripheral edges of the inner reflector can be positioned flushly with the luminaire aperture or can extend to one or more positions outwardly of the luminaire aperture and thus “proud” of a ceiling or the like within which the luminaire is recessed, surface-mounted or pendently mounted inter alia.

Multifocal and single focus lenses are defined by nonconical aspheric optical surfaces. Various alternative surface shapes provide one or more vision regions bounded by optical steps. Each optical step has rapidly and smoothly changing power in the radial direction which creates an induced aperture through which the cortical elements of the human vision system are induced to concentrate. The induced aperture results in increased clarity and enhanced vision. In various configurations, the induced aperture decreases spherical aberration to further enhance vision. To increase correction intensity at one or more powers, redundant power regions are provided in repeated optical steps or annular apertures. In several embodiments, the redundant power regions create multiple induced apertures at one or more optical powers directed at one or more vision distances.

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 invention discloses an ultra-high resolution optical microscope imaging method and device. In the technical scheme, a special lighting illumination and microscope imaging method combining narrow-band filtering, annular aperture and dark-filed illumination is adopted, and annular transmitting apertures with different numerical apertures, transmittances and filtering characteristics are designed, so that the ultra-high resolution and high-contrast microscope imaging on a micro-nano-sized substance can be realized. The device comprises a high-resolution optical microscope system consisting of an LED (light-emitting diode) lighting source, a light barrier, an annular transmitting hole, a condensing lens, a sample platform, a light-shading wafer, a microscope objective and a microscope image collecting and processing system, wherein the microscope image collecting and processing system consists of a CCD (Charge Coupled Device) image sensor, an imaging collecting card and a computer. The invention can maintain the real-time, direct and non-scanned imaging observation way of conventional optical microscopes, and also embodies excellent resolution and imaging contrast.

The invention provides a detection device and method for splicing measurement of a surface shape using pinhole diffraction wave front. Light emitted by a laser passes a filtering hole, a first collecting lens, a spatial filter, a beam expanding mirror, a lambda/2 wave plate, a lambda/4 wave plate, and an attenuation plate to be transmitted by a beam splitter, reflected by a reflection mirror, subsequently reflected by the beam splitter, and irradiated by a first optical adjusting frame and a second collecting lens set into a pinhole. Partial diffraction light produced by the pinhole is irradiated to a mirror surface to be detected, reflected light of the mirror surface to be detected is reflected by a pinhole frame to produce interference fringes with a part of diffraction wave surfaces of the pinhole, and the interference fringes pass s convergence optical unit and then are collected by an optical detector. The mirror surface to be detected is placed on a second optical adjusting frame and can move along a normal direction of the mirror surface to be detected for annular aperture splicing measurement, and meanwhile, rotation and translation of the first optical adjusting frame can be controlled for performing scanning and splicing measurement on the mirror surface to be detected.

A radially pressure balanced floating seal system is used to seal a rotating shaft, such as a drive shaft in a torpedo, or other type of vehicle or machinery. The radially pressure balanced floating seal includes an outer seal housing and an inner seal housing that floats with respect to the outer seal housing. The outer seal housing is secured proximate the shaft bearings, for example, in the tail cone of a torpedo. The inner seal housing is secured within an internal recessed region in the outer seal housing, and two or more discrete torque members or one distributed torque member extend from the outer seal housing to the inner seal housing to prevent rotation of the inner seal housing while allowing movement generally in a radial direction. The inner seal housing includes a lubricant recess formed within an internal annular aperture of the inner seal housing for containing lubricant. Double canted O-rings are disposed on each side of the lubricant recess in double canted O-ring grooves. The double canted grooves and O-rings prevent unbalanced radial forces that might cause rubbing of the shaft against the seal housing. In one embodiment, the lubricant recess is double canted to also minimize the sealing length.

An apparatus for filtering air includes a filter housing having an end plate and an annular aperture defining the size and shape of the end plate; and a filter element having a lip at an open end and a base at a closed end. The lip seals the filter element to the filter housing and to an unmodified, stock air intake of a vehicle. The filter media comprises pleated natural fiber fabric supported between two structural mesh layers. The base has a mounting post attached to the base that fits into a mounting hole in the end plate of the filter housing to hold the filter element in the housing. The base matches the size and shape of the end plate. The base and annular aperture are sized to optimize the filter media and pleat spacing for achieving a required airflow and maximal effective area for filtration.

This invention involves an online cell microscopic observation instrument for biochemical reactor, including the main instrument of the observation, the objective lens, the observation window incident, sampling devices, external light source system. Its characteristics are: reflectance prism is installed between external light source and lens system. There is a reflecting mirror behind the objective lens and in the front of entrance window. Reflecting prism is placed in the front of annular aperture films. the upper side of the reflecting prism has a home or area array CCD image sensor. Sampling device includes sampling block, elastic components, a mobile device. The elastic element is installed between sampling block and the drive shaft of mobile devices. the gab between the front face of sampling block and observation entrance window develops the sampling pool. The external light source system of this invention can easily replace wavelength through different filter replacement; dark field of view at the same time lighting can improve resolution of observation instrument for the cells into the contrast of the image and resolution; and it is simple in structure, easy-to-use, manufacturing costs low.

The padlock housing assembly includes a padlock housing having monolithically formed walls for cradling an existing padlock therein. A top one of the walls is provided with an annular aperture for receiving a U-shaped shank of an existing padlock therethrough. The shank maintains a static relationship with the padlock housing when the shank is passed through the aperture and engaged with the existing padlock to a closed position. An audio mechanism is included for playing an audio file when the shank is biased to an open position and is housed within the cavity. At least one LED is also provided for emitting a predetermined luminescence when the shaft is biased to the open position. A trigger mechanism transmits a power input signal to the audio mechanism when the shank is biased to the open position. The triggering mechanism is operably engaged with the shank.

The invention discloses a foldable ultrathin optical imaging system comprising an annular aperture ultrathin optical imaging lens and an imaging plane (7) and characterized in that the annular aperture ultrathin optical imaging system comprises annular light passing apertures (11)-(12) and first and second plane mirrors (31)-(32) and (51)-(52) on a front surface; and first and second high-order aspheric mirrors (21)-(22), (41)-(42) and a high-order aspheric transmission surface (61)-(62) on a rear surface. Compared with the prior art, the foldable ultrathin optical imaging system of the invention uses multiple reflection light folding technology, and has a small volume and compact structure. An image surface is kept at a distance from the rear surface of a lens. The structure is designed in such a way that the lens is less likely to be affected by external stray light. The lens has a large depth of field in an acceptable field of view, and has a wide operating range.

The invention discloses an optical system for a telescope. The optical system is an axisymmetric circular lens. According to the sequence of a light path, the front surface and the rear surface of the lens respectively comprise a circular aperture concentric with an optical axis and located in the centre of the lens and an annular aperture surrounding the circular aperture; and the surface shapes of the circular aperture and the annular aperture are axisymmetric aspheric surfaces or spherical surfaces. For the front surface of the lens, the central circular aperture of the front surface of the lens is a concave surface plated with an internal reflection film, and the annular aperture of the front surface of the lens is a convex surface plated with a reducing reflection film; and for the rear surface of the lens, the central circular aperture of the rear surface of the lens is a convex surface plated with a reducing reflection film, and the annular aperture of the rear surface of the lens is a concave surface plated with an internal reflection film. According to the invention, the telescope system on a single lens is realized, the number of the lens is reduced, material cost and processing cost are reduced, and the advantages of refracting telescopes and reflecting telescopes are reserved. With strong aberration correction ability, short light path, wide field, good image quality and convenience for carrying, the optical system is suitable for preparing glasses telescopes.

The invention relates to a combined machining system utilizing ultrashort pulse lasers, and belongs to the technical field of precision machining combining ultrafast laser machining and traditional laser machining. The combined machining system is mainly composed of a lighting light source, a beam splitter prism, a CCD image detector, a femtosecond laser, an annular aperture diffraction grating, a first dichroic mirror, a picosecond laser, a second dichroic mirror, a focusing lens, a two-dimensional moving table and a microcomputer control system. The combined machining system has the advantages that the advantage of high femtosecond laser machining precision and the advantages of high energy density and efficiency of picosecond laser machining are combined, the requirements for high efficiency and high precision in the laser machining process can be met simultaneously, and the combined machining system can be widely applied to the fields of laser drilling with the high depth-diameter ratio, fine machining of key parts of the aerospace field, and micro/nano sensor and microstructure manufacturing.

A method and apparatus for generating a beam of light having extended depth of focus. The apparatus comprises, for instance, a binary phase mask that generates a diffraction pattern including a bright main ring and a plurality of side-lobe rings, an annular aperture mask that passing only a portion of the diffraction pattern, and a lens that causes light passing through the annular aperture to converge toward and cross an optical axis. Where the converging light crosses the optical axis, constructive interference takes place, thereby generating a beam of light that has extended depth of focus.

A vaporization device includes a wick and coil assembly comprising a plurality of coils disposed on a ceramic support member, and an e-liquid reservoir comprising an annular configuration that narrows radially at a longitudinal end thereof to define an annular aperture that provides fluid communication between the reservoir and the wick and coil assembly.