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5696581 |
Lens evaluating device
A lens evaluating device for measuring the optical transfer function of the lens under evaluation for evaluating the lens. The lens evaluating device includes an exposure light source, a converging...
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5694214 |
Surface inspection method and apparatus
A surface inspection apparatus of the present invention comprises an optical sensor having a plurality of detecting portions arranged in a sub-scan direction, the detecting portions being...
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5677525 |
Ancillary module for making a spatially-resolved measurement of a focus volume
The invention relates to an ancillary module 7 for making spatially resolved measurements of the focus volume of a light beam focussed by a microscope objective 4. The light beam is especially a...
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5675406 |
Portable device for ensuring that a center thickness of a lens is within a predetermined tolerance
A portable lens measuring device (10) comprises a plurality of optical fibers (23) and a lamp (18) for providing light to a common end. The portable lens measuring device (10) includes a sensor...
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5657116 |
Ocular lens measuring apparatus
An apparatus for measuring the optical characteristics of an ocular lens includes a first measuring system for detecting light transmitted through the ocular lens and through a predetermined...
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5651076 |
System for determining the bidimensional characteristic function of a continuous optical conversion member
A light source produces a light beam which is projected through a pattern to form a light beam incident on a surface of a continuous member. The pattern defines two transparent and opaque surfaces...
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5640233 |
Plate correction technique for imaging systems
A stepper configuration is modified by corrector plates so that an image from a reticle plane is projected to an ideal image at an object plane. The system correction is based on the premise that...
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5638169 |
Method and apparatus for centering optical lens mount
An apparatus for turning the external circumference of an optical lens mount, a collimator is optically aligned with the turning axis (y-y). A fixture is mounted on the apparatus to accommodate the...
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5629766 |
Global MTF measurement system
The MTF for an optical or electronic device(s) is evaluated over a substantial portion of an image signal. As a result, a composite MTF representing a more global evaluation is achieved....
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5627638 |
Method and apparatus for detecting defects in lenses
There is provided a method and an apparatus for testing an optical component for cosmetic defects, the component having optical surfaces, a peripheral surface and a bulk defined by the optical and...
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5621519 |
Imaging system transfer function control method and apparatus
Accurately measuring and controlling the system transfer function of an imaging system, by eliminating interference from aliases. An image is captured of an image primitive with a uniaxial pattern,...
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5621520 |
Transparency inspection method for blurriness in vehicle windscreens with elastomeric liners
A method of determining the optical quality of blurriness in a windscreen transparency having a protective liner made of a particular material. A modulation transfer function (MTF) is measured...
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5615006 |
Imaging characteristic and asymetric abrerration measurement of projection optical system
A method of exposing images of measuring patterns formed on a mask on a photosensitive substrate through a projection optical system, measuring positional deviation quantities of the exposed images...
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5604583 |
Computer vision inspection station
A lens inspection system 10 has two cameras 50, 51 for capturing plan and edge images views of a lens 20 and providing pixel data signals representative of the images. The pixel data signals...
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5602640 |
Lensmeter accessory
A lensmeter accessory is disclosed for supporting and positioning a corneal contact lens in a light path of a lensmeter. The accessory comprises a generally planer body with a tapered slot therein...
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5600432 |
Method and apparatus for measurement of resolution of imaging systems
A photographic facsimile of a line image at a predetermined orientation is illuminated by a collimated monochromatic light source to produce a diffraction pattern. The diffraction pattern is...
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5582185 |
Device for evaluating optical elements by reflected images
A method and apparatus for evaluating optical elements which utilizes reflected images. The method allows determination of the optical effects contributed by individual surfaces of a single optical...
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5581347 |
Optimization method and device for direct measurement of an optical component
A method and device for measurement of the geometrical or optical structure of an optical component such as a lens or a mold for making lens are provided. The method comprises the steps of...
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5574554 |
Contact lens inspection apparatus and lens mold for use in such apparatus
Collimated white light is transmitted through a transparent lens mold having a molded lens resting on a curved surface thereof. A telecentric lens and a camera having a digital output are used to...
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5557403 |
System and method for measuring crazing in a transparency
A system for measuring crazing in a transparency is described which comprises one or more light sources disposed near a first surface of the transparency for projecting light rays through the...
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5553184 |
Process for the application of fiber optical bundles comprising optical fibers
A process for applying fiber optical bundles comprising optical fibers for isual and measurement-related purposes is provided, in which process light is coupled into the fiber optical bundle on a...
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5550632 |
Method for evaluating gloss and brightness character of coated paint film
A method for evaluating the gloss and brightness character of a coated paint film. The method is comprised of projecting a brightness and darkness pattern onto the surface of the coated paint film....
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5539837 |
Apparatus and method for measuring curved surfaces
A transparent curved surface is illuminated and view along an orthogonal axis to generate a cross-section image of the subject surface. This image is processed to extract the first and second...
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5528357 |
Illumination and imaging subsystems for a lens inspection system
Illumination and imaging subsystems for a system for inspecting ophthalmic lenses. The subsystems include a lens holder, a light source, a pixel array and a processor. In use, the light source...
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5526113 |
Method and apparatus for measurement of spatial signal and noise power of imaging systems
A photographic facsimile of a line image at a predetermined orientation is illuminated by a collimated monochromatic light source to produce a diffraction pattern. The Fourier distribution of the...
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5523836 |
Method and apparatus for orienting a lens' refractive characteristics and lay-out properties
To determine and block the orientation of a lens located in only one location by both its refractive characteristics and lay-out properties preparatory for edge grinding relative to a template...
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5521700 |
Meter for testing progressive multifocus lenses
The present invention provides a lens meter capable of accurately measuring the optical characteristics of a lens including additive diopter and of providing highly reliable data representing the...
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5515470 |
Process for reconstructing a picture coupled into a fiber optical bundle made of optical fibers
A process for reconstructing a picture coupled into a fiber optical bundle 1) comprising optical fibers (2) is provided. It is immaterial for this process whether the optical fibers (2) are...
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5500767 |
Objective lens and method of measuring its performance
An objective lens is corrected for spherical aberration at both an operating wavelength and a measurement wavelength, such that the amount of spherical aberration to develop at the operating...
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5500732 |
Lens inspection system and method
A system and method for inspecting ophthalmic lenses. The system comprises a transport subsystem for moving the lenses into an inspection position, and an illumination subsystem to generate a light...
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5489978 |
Lens measuring apparatus
A lens measuring apparatus has a light beam projecting unit for projecting a light beam onto a lens to be examined, a photoelectric detector for detecting the light beam projected onto the lens to...
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5467192 |
Improvements in or relating to surface curvature measurement
An apparatus for the measurement of the curvature of a surface includes at least one source of electromagnetic radiation, an electromagnetic radiation detector, and a lens positioned and arranged...
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5450352 |
Method for reducing sidelobe impact of low order aberration in a coronagraph
The invention relates to a method for reducing a sidelobe impact of low order aberrations using a coronagraph (2) having an apodized occulting mask (10), comprising the steps of: (a) providing in...
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5440383 |
Phase detection deflectometer-type optical device having a large measuring range
An optical device, of the deflectometer type, particularly with phase detection, comprises a light source, a surface to be tested, a semi-reflective surface between the light source and the surface...
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5438405 |
Device and method for testing optical elements
A system for grading and evaluating optical elements, such as lenses, filters, reticules and the like, where the tested element is scanned by at least one wedge shaped light beam, which has an...
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5432596 |
Lens measurement apparatus providing measurements of multiple lens characteristics
Lens measurement apparatus provides a holding device for holding a lens to be measured at a designated position, a first index projecting optical system for projecting a first refractive power...
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5428414 |
Apparatus for measuring the refractive power of an optical system
A compact, low-cost apparatus for measuring the refractive index of an eye utilizes a chopper which forms and scans two orthogonal fringes. In a light-receiving unit, at least three light-receiving...
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5416574 |
Automated optical measurement apparatus
A system for the automatic measurement of parameters of optical elements such as radii of curvature, thickness, power, index of refraction, and focal length including the radii of curvature of...
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5414505 |
Lens meter for testing progressive lens
A lens meter having an optical measuring system which can measure optical characteristics of a progressive lens includes a memory means which stores the optical characteristics of each measuring...
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5408311 |
Method for measuring a refracting power of an optical system and its apparatus
A method and apparatus for measuring a refracting power of an optical system to be inspected. A beam source generates a luminous flux which passes through the optical system to be inspected. A...
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5406375 |
Angular distortion measurements by moire fringe patterns
A process and apparatus for measuring angular distortion in an optical imaging system in order to provide a mapping that completely characterizes the distortion of the imaging system involves...
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5402225 |
Optical instrument evaluation using modulation transfer function chart
A novel chart permits rapid and inexpensive evaluation of an optical instrument for manufacturing purposes and/or by an operator of the instrument. For example, a user of an optical instrument may...
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5402224 |
Distortion inspecting method for projection optical system
A method for inspecting distortion characteristics of a projection optical system to be inspected by arranging a mask formed with measurement patterns at a plurality of predetermined positions on...
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5396324 |
Lens meter for measuring a refractive power of a lens
A lens meter including an illumination light source for illuminating a measurement target, a target projection optical system for projecting the measurement target onto an inspected lens, an...
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5392119 |
Plate correction of imaging systems
An object is projected through the lens system to be corrected to the image plane where the position of the diffraction limited ideal image is readily ascertainable. At least one primary image...
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5387970 |
Nullifying lens and test method for quality control of intraocular lenses
A method for testing multifocal intraocular lenses and intraocular lenses having designed-in optical aberrations. The method includes the providing of a nullifying lens having an optical zone...
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5363188 |
Method and device for monitoring the transparency of a laminated pane
A method and a device for monitoring the transparency of at least a portion of a preassembled laminated pane by analysis of the luminous intensity of the image of a test pattern viewed through the...
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5361129 |
Method of assessing a surface figure of an optical element
A novel method for assessing a surface figure of an optical element. The method preferably comprises subjecting the optical element to a classical autocollimation testing procedure for ascertaining...
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5355210 |
Method and apparatus for measuring optical properties of optical devices
A method and apparatus for measuring an optical property of an optical device, such as a convex or concave reflector surface, by locating a main converging lens having a focal length f 1 in front...
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5355213 |
Inspection system for detecting surface flaws
An inspection system for detecting surface flaws in a transparent element which includes a source of electromagnetic radiation, such as a laser beam or visible light, with the radiation beam...
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