Matches 351 - 400 out of 609 < 1 2 3 4 5 6 7 8 9 10 11 12 13 >
Match Document Document Title
5339151 Spectrometer for lensometer  
A spectrometer is incorporated to a conventional lensometer. The spectrometer includes a uniform extended light source including a light source having visible and ultraviolet emission and an...
5335059 Method and apparatus for measuring lens performance  
A method and apparatus for lens measurement that provide for a small error of measurement where a light source used for measurement emits a beam of light at a wavelength different from an operating...
5331394 Automated lensometer  
An automated lensometer including a mounting device to support and center a lens to be tested along an axis. First and second arrays of light source patterns are positioned at different optical...
5321493 Apparatus and method for evaluating a projection lens  
An apparatus for evaluating a projection lens has a light source, a condenser lens, a half mirror, a mask having focus test patterns in each of which light-blocking members and light-transmitting...
5307141 Refractive characteristics measuring apparatus for measuring the refractive characteristics of a lens  
A refractive characteristics measuring apparatus enables the measurement of the refractive characteristics of a progressive multifocal lens through the observation of a geometrical test pattern...
5303023 Apparatus and method for inspecting a test lens, method of making a test lens  
An apparatus for inspecting a test lens, such as an intraocular lens, comprising a light source and collimating lens positioned to receive light from the light source and direct collimated light to...
5303022 Lensometer with guided lens movement for progressive addition lens  
A computer indicated lens movement direction protocol is utilized in combination with a lensmeter to designate required movement of lenses with respect to a lensmeter to insure sequential...
5296705 Imaging system with integrated measuring of the wear of its optical elements working in transmission mode and optronic imaging equipment comprising an imaging system such as this  
An imaging system is provided with integrated measurement of wear in at least one of the system's optical elements working in the transmission mode, in a given spectral band. The system includes a...
5293211 Microreflectometer system  
The microreflectometer system, forming a 0.01 mm 2 area spot, scans a mirror coating for defects of a mirror having a diameter of about 30 centimeters. Tens of thousands of reflectivity...
5291333 Alignment system for a segmented telescope  
A new coronagraph sufficiently increases the contrast ratio between the infrared image of a nonsolar star and a possible orbiting nonsolar planet to make imaging of such a planet possible. The...
5289254 Process and apparatus for testing optical components or systems  
Process and apparatus for testing optical components (12) or systems which are contained in an apparatus consisting of a focusing optical system (1) and a space-resolving light detector (2) close...
5283629 Method for assessing a vertex radius of curvature  
A method for determining a vertex radius of curvature for an optical surface. The method comprises subjecting the optical surface to a classical collimation testing procedure, so that the optical...
5280336 Automated radius measurement apparatus  
A system for the automatic measurement of radius of curvature of convex or concave optical surfaces such as those of lenses, molds, inserts, ball bearings or micro-optics. The system includes an...
5268742 Full aperture interferometry for grazing incidence optics  
A grazing incidence interferometer (1) includes a laser (10) and a beamsplitter (16) for splitting an output of the laser into a reference beam (B) and into a sample beam (A). A surface (18) to be...
5257092 Apparatus for measuring polarization and birefringence  
A polarization and birefringence measuring device has an optical source which causes a wide polarized light beam to impinge on a specimen. A photodetecting sensor having picture elements in two...
5245402 General aspherical surface optical testing device  
A general aspherical surface optical testing device comprised of a collimator lens system having lens designed to a predetermined radius of curvature that perfectly collimates a focused laser beam...
5221834 Method for providing feedback correction for an imaging device  
A method for assessing and correcting via feedback, the optical quality of an imaging device. The method has an advantage of expanding the applicability of a classical optical transfer function,...
5187539 Mirror surface characteristic testing  
An apparatus and method are disclosed for characterizing the surface of mirrors in which a cross-grid type phase grating is illuminated from behind by light reflected from the mirror so as to...
5179273 Method for testing or controlling a performance of an adaptive optic  
A method for testing or controlling a performance of an adaptive optic. The method includes the steps of generating from the adaptive optic an augmented matrix comprising a local wavefront...
5175594 Lensmeter with correction for refractive index and spherical aberration  
In an automated lensmeter, provision is made for estimating dispersion when high index glasses are utilized with lenses having relatively large diopter prescriptions and for eliminating error due...
5173739 Automatic lensmeter for progressive addition lens  
An automatic lensmeter according to the present invention is used for accurately measuring optical characteristics of a lens to be examined. The automatic lensmeter incorporates a mode change-over...
5173738 Device for inspecting contact lenses  
The device is useful for detecting deposts on the surface of contact lenses and changes in the material of the contact lenses. It consists of an optically transparent rod-shaped body (1) with two...
5155558 Method and apparatus for analyzing the appearance features of a surface  
A method and apparatus for analyzing the appearance features of a surface with a spatially coherent beam of uniformly distributed collimated polychromatic light that is directed through a beam...
5155553 Multiple-color null lens employing refractive and diffractive optical elements  
Disclosed is an apparatus (10) for null lens testing of an optical element (20). This apparatus incorporates both refractive (32, 36) and diffractive (30, 34) optical elements to create a null lens...
5155544 Foucault method for testing an optical surface  
The Foucault or knife-edge method may be employed for testing an optical surface defined by an imaging device, for example, a mirror surface, to ascertain its characteristics, for example, whether...
5151752 Method of measuring refractive indices of lens and sample liquid  
A method of measuring a refractive index distribution of a lens is disclosed which comprises, immersing a glass sample and a lens under test within a matching fluid whose refractive index differs...
5141320 Method and system for evaluating gloss and brightness character of coated paint film  
A method for evaluating a gloss and brightness character of a coated paint film. The idea of the gloss and brightness cahracter is classified into three feelings, i.e., a smooth feeling, a...
5126550 Method for assessing the optical quality of an imaging device  
A method for assessing the optical quality of an imaging device. The method is suitable for use in an optical system comprising a source of radiation that can output a radiation beam; and, an...
5108174 Method and device for determining lens characteristics including its power  
To determine the focal power of an ophthalmic lens, a plurality of light rays are passed through the lens and a photosensitive position sensor is disposed on the exit side of the lens to measure...
5100232 Apparatus and method for detecting hidden marks on progressive aspheric ophthalmic lenses  
A device for detecting hidden marks on progressive aspheric ophthalmic lens is disclosed. The device includes a housing, a light source within the housing, a magnifying lens mounted above the...
5092676 Method and system for evaluating gloss and brightness character of coated paint film  
A method for evaluating a gloss and brightness character of a coated paint film. The idea of the gloss and brightness character is classified into three feelings, i.e., a smooth feeling, a...
5075883 Analog and analytical computation method for determining detector MTF  
An analog computer method provides modulation transfer functions (MTF) expressions or graphs for arbitrary shaped detectors in an arbitrary scan direction. Fraunhofer diffraction calculations or...
5066120 Optical device for phase detection testing optical system, especially ophthalmic lenses  
A device for phase detection testing any kind of optical system, in particular an ophthalmic lens, comprises along an optical axis, an emission device which constitutes a light source, a holding...
5066119 Optical device for phase detection testing optical systems, especially ophthalmic lenses  
A device for phase detection testing any kind of optical system, in particular an ophthalmic lens, comprises, along an optical path, an emission device which constitutes a light source, a holding...
5062705 Apparatus for evaluating a lens  
A first reticle is located at an object position of a lens to be evaluated. The first reticle is formed with a first diffraction grating. A stage supports the first reticle. A coherent light source...
5059022 Device for measuring radius of curvature and a method thereof  
A device for measuring the radius of curvature of an optical element comprises a point light source or a pinhole, a beam splitter, an imaging optical system for forming a point image, an attaching...
5056917 Lithotripter reflector inspection  
Structure is provided for inspecting a lithotripter ellipsoidal reflector. In one form of the invention a narrow light beam such as a laser light beam is projected through the first focus point of...
5048000 Optical information reading apparatus comprising a diffraction grating member having first and second portions  
An optical information reading apparatus for reading recorded information by detecting the presence or absence of pits on an optical disk using a laser beam. The laser beam converged a lens...
5024527 Method and apparatus for remote position sensing using edge diffraction  
Contact lenses can be made by machining an inner concave surface into a plastics material blank, then mounting the blank in a lathe and machining the outer convex surface thereon. Repeated...
5022753 Modified Foucault method for uniquely profiling an imaging device  
A novel method for quantitatively assessing an imaging device in terms of the classical encircled energy test is disclosed in a contemporaneously filed Application. The present invention...
5020905 Application of the Foucault knife-edge test to a segmented optic  
The Foucault knife-edge test has been traditionally employed for testing a monolithic imaging device, for example, a mirror, to ascertain its characteristics, for example, whether or not it is a...
5015096 Method and apparatus for testing optical components  
A method and apparatus for scanning and testing optical components is disclosed. An incident laser beam is directed at a trihedral retroreflector and is redirected by the trihedral retroreflector...
5007734 Apparatus for measuring the refraction characteristics of ophthamological lenses  
An apparatus for measuring the refraction characteristics of ophthalmological lenses comprises a projection optic for projecting light of a light source via a field aperture with a measuring figure...
5004337 Modified Foucault for testing an imaging device in terms of the encircled energy test  
A novel method for quantitatively assessing an imaging device in terms of the classical encircled energy test. The method of the present invention provides this capability by a novel adaptation of...
4993831 Closed loop Foucault knife-edge test  
The historical Foucault knife-edge test enables one to passively ascertain an optical imaging device's characteristics, for example, whether or not it is a source of optical aberrations. The...
4989972 Low reflectivity surface relief gratings for photodetectors  
Photodetectors having low reflectivity triangular groove, surface relief gratings on homogenous material or one layer of a heterostructure. Preferably, the photodetector is a PIN photodiode in...
4979819 Foucault knife-edge test for quantitatively determining a wavefront aberration over the entire surface of an optical imaging device  
The historical Foucault knife-edge test enables one to qualitatively ascertain an optical imaging device's characteristics, for example, whether or not it is a source of optical aberrations. The...
4969737 Expanded foucault knife-edge test for quantitatively testing an optical imaging device  
The historical Foucault knife-edge test enables one to qualitatively ascertain an optical imaging device's characteristics, for example, whether or not it is a source of optical aberrations. The...
4925301 Method and apparatus for sensing the figure of optical elements  
A laser source 28 and curvature matching optics 30 cooperate to generate a probe beam 32 having a generally Gaussian phase front with a given radius of curvature. The probe beam is reflected off of...
4866644 Optical instrument calibration system  
In a calibration system for optical instruments of the type which make measurements at incrementally spaced wavelengths throughout a spectrum, a plurality of standard samples are measured by a...
Matches 351 - 400 out of 609 < 1 2 3 4 5 6 7 8 9 10 11 12 13 >