435 results about "Curved mirror" patented technology

A collimating image-forming apparatus comprising a first linear polarizer is disclosed. A first quarter-wave plate is disposed adjacent the first polarizer and has its fast and slow axes at substantially 45° to the plane of polarization of the first polarizer. The apparatus further comprises a beam-splitting curved mirror having a convex surface adjacent the first polarizer and facing towards the first quarter-wave plate, a second quarter-wave plate adjacent the concave side of the curved mirror, the second quarter-wave plate having its having its fast and slow axes oriented with respect to the corresponding axes of the first quarter-wave plate at angles substantially equal to a first integral multiple of 90°, and a reflective-transmissive polarizing member adjacent the second quarter-wave plate. A second linear polarizer is adjacent the reflective-transmissive polarizing member, the second linear polarizer having its plane of polarization oriented with respect to the plane of polarization of the first linear polarizer at an angle substantially equal to a second integral multiple of 90°, both of the multiples being even or both being odd.

A catadioptric camera having a perspective camera and multiple curved mirrors, images the multiple curved mirrors and uses the epsilon constraint to establish a vertical parallax between points in one mirror and their corresponding reflection in another. An ASIFT transform is applied to all the mirror images to establish a collection of corresponding feature points, and edge detection is applied on mirror images to identify edge pixels. A first edge pixel in a first imaged mirror is selected, its 25 nearest feature points are identified, and a rigid transform is applied to them. The rigid transform is fitted to 25 corresponding feature points in a second imaged mirror. The closes edge pixel to the expected location as determined by the fitted rigid transform is identified, and its distance to the vertical parallax is determined. If the distance is not greater than predefined maximum, then it is deemed correlate to the edge pixel in the first imaged mirror.

An image projection system and method is presented for optically projecting an image onto a display surface with visually correct geometry and optimum image quality. The projection system includes an image processing unit for receiving the input image data and generating distortion-compensated image data to compensate for ensuing spatial distortions in the projection system, a projection light engine for receiving the distortion-compensated image data and projecting a distortion-compensated optical image that corresponds to the distortion-compensated image data; and, an optical reflection assembly comprising at least one curved mirror positioned in the optical path of the distortion-compensated optical image emerging from the projection light engine for producing a displayed optical image with reduced distortion on the display surface. The image processing unit distortion-compensates the input image data such that the optical and spatial distortions associated with the projection light engine and optical reflection assembly are substantially reduced in the displayed optical image.

The invention is directed to an optical system for a fundus camera for reflection-free opthalmoscopy having a beam path with refractive and reflective optical elements which are used substantially in common for illumination and observation or recording. An imaging mirror system substantially comprising a plurality of reflecting optical elements in the form of mirrors and is provided for illuminating and imaging the fundus. At least one optical element, for example, mirror, is formed as a freeform mirror with an imaging, reflecting freeform surface. The optical elements are arranged in a housing in a precisely defined position and attitude relative to one another in such a way that an imaging of the reflecting surfaces of the optical elements on the image of the imaged retina is prevented within a wide diopter range of the patient's eye to be examined.

A method and apparatus for providing a guide for use with rotary components such as a rotary saw. In the preferred embodiment the invention is comprised of a rotary saw with a blade, a reflector affixed adjacent and coaxial to said blade, a light beam source, preferably a laser projecting a beam of light co-planer to and at said reflector. The reflector acts as a curved mirror to fan the beam of light creating a guideline coplanar with the rotary component or blade of the rotary saw.

The invention provides an AR or VR imaging method and glasses capable of being used for AR or VR in order to solve the technical problems that an existing AR imaging method and AR glasses images deform, the gravity center of the AR glasses are near the front, and a display screen is large. The glasses comprise a head-mounted support, a display unit arranged on the head-mounted support, a reflecting unit and a central beam splitter. The reflecting unit comprises a holophote, a Fresnel lens and cambered lenses which are arranged on a light path of the display unit. The cambered lenses are arranged in front of the eyes of a user; the holophote reflects VR split screen images and carries out secondary amplifying or shrinking, and imaging is carried out in the eyes of the user; the cambered lenses reflect the AR split screen images respectively and carry out secondary amplifying or shrinking, imaging is carried out in the eyes of the user, scenes in front of the eyes of the user are transmitted into the eyes of the user, and it is guaranteed that image deformation is small under the condition that the gravity center of the AR glasses is close to the forehead. A small focal distance is adopted, the height of a display screen is half of that in the prior art, and the load bearing feeling is small when the user wears the glasses.

A two-dimensional micro optical scanner is provided. The two-dimensional micro optical scanner includes a first scanner with a first mirror pivoted in a first direction; a second scanner with a second mirror pivoted in a second direction; and an optical path changing member with a curved mirror. The optical path changing member directs light scanned by the first scanner to the second scanner.

An image display apparatus (1000) mounted on an object or attached to a human body, includes: an image forming unit (200) to form an image with light; an optical system including a curved mirror (9) that reflects the light forming the image toward a bent transmission and reflection member; and a rotator (310) to rotate the curved mirror (9) about a prescribed axis. A first projection image, which is a projection image on an XY plane of the image, forms an angle θ1 with respect to an X direction. A second projection image, which is a projection image on an XY plane of the prescribed axis, forms an angle θ2 with respect to the X direction. The X denotes a lateral direction of the object or the human body and the Y direction denotes a vertical direction of the object or the human body.

The present invention relates to an optical element for VEC-SELs or VECSEL arrays. The optical element is formed of a substrate (200) which is transparent at least in a wavelength region of optical radiation. A first interface of the- substrate (200) comprises one or several curved regions forming part of an optical lens or of an array of optical lenses (220) integrated in the substrate (200). The substrate (200) further comprises one or several optical mirrors (210) formed on a second interface of the substrate (200) opposing the first interface or embedded in the substrate (200). The optical mirrors (210) are arranged and designed to back reflect a fraction of optical radiation incident on the first or second interface. The optical mirrors (210) are flat mirrors or curved mirrors having a radius of curvature different from the radius of curvature of the curved region (220). The optical element allows the fabrication of a VECSEL or VECSEL array having a high brightness without the requirement of additional adjustments during fabrication. The VECSEL are arranged at a distance (L) to the optical mirrors (210) and this equals the length of the external cavity. The ROC of the optical lens may be chosen to ROC=L/2 and for the optical mirror ROC>L. The cavity length may be adjusted by a monolithic spacer (120)

The invention relates to a novel binocular stereoscopic vision measuring device, which comprises two omnibearing vision sensors provided with the same imaging parameters, a connecting unit and a microprocessor which is used for performing three-dimensional stereoscopic vision reconstruction on images of the two omnibearing vision sensors, wherein the omnibearing vision sensors comprise hyperbolic mirror surfaces, upper covers, stand bars, transparent glass surfaces, supplementary lens frames and image units; the upper covers are arranged on the hyperbolic mirror surfaces; the stand bars are round platforms with thick upper parts and thin lower parts; upper ends of the stand bars are arranged inside small holes in bottom centers of the hyperbolic mirror surfaces, and lower ends of the stand bars are arranged inside mounting holes in the centers of the transparent glass surfaces which are embedded into the supplementary lens frames; the stand bars are perpendicular to the transparent glass surfaces; and the image units are positioned inside the supplementary lens frames. The novel binocular stereoscopic vision measuring device simplifies the complexity of calculation of stereo matching and so on, saves the operation of camera calibration, is convenient to perform feature extraction, is easy to realize stereo image matching, and finally achieves the aim of high-efficiency, real-time and accurate stereoscopic vision measurement.

A laser beam in the ultraviolet region is generated at high power for along period. A green laser beam generated by a laser oscillator comes incident into a resonator from behind a first curved mirror, and circulates there, reflected by each mirror. By passing a barium borate crystal, it causes a secondary harmonic (a laser beam in the ultraviolet region) to be generated, which is taken out of the resonator via a second curved mirror. The beam waist of the laser beam passing the barium borate crystal is set to 46 mum, about double the conventional thickness, by adjusting the distance between the first curved mirror and a second flat mirror. As a result, the power density of the laser beam in the barium borate crystal is reduced to ¼ of the value according to the related art, and it is made possible to avoid rapid degradation of the barium borate crystal by excessive squeezing of the laser beam.

A catadioptric projection objective for microlithography has at least one curved mirror that is deformable and adjusting elements that can deform the deformable mirror. The adjusting elements are matched to given image errors and their correction. The invention is suitable for astigmatism, fourfold wavefront-deformations due to lens heating, compaction, and the like.

The invention provides a THz wave radiation source with an oval groove grating structure. The oval groove grating with periodicity is adopted as a beam-wave interaction structure of the radiation source. When an electron beam passes through the structure at a certain speed, the electron beam and surface slow waves interact to be clustered and generate an electron beam cluster, then Smith-Purcell coherent radiation is stimulated, radiation is collected through a flat plate or a curved mirror (metal or medium) to generate tunable, compact and high-power THz waves, and therefore the THz wave radiation source can be easily applied to communication, radars, electronic countermeasures, electromagnetic weapons, astronomy, medical imaging, nondestructive detection, safety inspection and other aspects.

The invention discloses a heliostat through glass micro-arc mirror shaping technique in the solar utilizing technical domain, which is composed of curved mirror composite adjusting device and a group of single-chip glass micro-arc curved mirror shaping adjusting device, wherein the glass mirror rack of the single-chip glass micro-arc curved mirror shaping adjusting device is connected with the glass mirror through three groups of adjustable connecting devices at two ends or in the middle; two ends of each single-chip glass micro-arc curved mirror shaping adjusting device are fixed on the main frame of the curved mirror composite adjusting device through at least two groups of locking fixing piece, which are arranged adjacently; the incidence adjusting device is loaded near two groups of locking fixing piece adjacent to the main frame.

An apparatus for transforming the shape of an image in a way that utilizes substantially all the available pixels for both the image generated and the sensor to which the image is projected, is disclosed. Also disclosed is an apparatus and method to reduce or eliminate substantially any blurring associated with a non-planar focal plane associated with an image generated from a curved mirror, particularly when some portions of the image are focused on the plane of the sensor and other portions are blurred. Loss of image resolution is eliminated, thereby achieving desired fiber optic image mapping, by the present invention for coherent and incoherent fiber optic cables.

An optical apparatus includes a transparent microdisplay and a curved mirror. The transparent microdisplay has an array of self-illuminating emitters configured to emit image light propagating in an external direction. The curved mirror is positioned to reflect the image light toward an eye-ward side of the optical apparatus. A first curvature of the curved mirror has an optical power configured to focus the image light reflected by the curved mirror within an eyebox sized area. The transparent microdisplay is disposed between the curved mirror and the eyebox sized area.

A backlight is provided for an at least partially transmissive display or another lighting application. The backlight comprises an array of primary light sources that emit downwards towards an arrangement of curved mirror surfaces. The light reflected by the mirror surfaces is collimated by an arrangement of lenses. The mirror surface shape, lens shape, primary light source positions and the separation between the lens and mirror surfaces are chosen to ensure a high degree of spatial uniformity as well as collimation.