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3947127 |
Optical component functional tester
An optical testing apparatus for use in non-destructive testing of optical omponents to evaluate their operational requirements. The optical component to be tested is mounted on a fixture that...
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3938892 |
Electronic optical transfer function analyzer
An electronic optical analyzer for use in systems such as optical transfer function analyzers eliminates mechanical scanning systems and comprises entirely electronic image dissection means for...
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3936160 |
Interferometer for the measurement of wavefront sections of general imaging systems including the human eye
An interferometer method for measuring aberrations in a lens system by analysis of a Fourier transform pattern generated by the lens system and the embodiment of this principle for the measurement...
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3930732 |
Device and process for testing a lens system
Device and process for testing the optical transfer function of a lens system which comprise employing as the object or target the laterally moving-fringe pattern produced by convergence of two...
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3917391 |
Projection system for measuring curves and cross-sectional dimensions of hydrophilic contact lenses
The contours of a hydrophilic contact lens immersed in saline solution within a transparent cell can be projected to give a clear, accurately measurable cross-sectional image by introducing an...
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3912395 |
Optical system calibration method
A method for the calibration of distortion in optical systems. A beam of collimated light is diffracted into various orders by being passed through a diffraction grating. The diffracted light...
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3912396 |
Electronic lens tester
An apparatus for measuring the modulation transfer function of an image-forming lens or lens system. The apparatus uses an object target which is of the type having parallel light lines on a dark...
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3904294 |
Automatic lens testing apparatus
This invention relates to a method and apparatus for acceptance testing of photographic objective lenses. It includes evaluating the lenses' optical performance at several representative locations...
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3899245 |
Testing device for cinematographic cameras
A cartridge inserted into camera to check its performance contains an endless film strip with a series of test frames to be projected via the camera objective upon a screen. The film, led around a...
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3892494 |
Detection of optical micro-defects with focused retroreflected scanning beam
A method and apparatus for testing the surfaces of optical components for scratches by scanning a focussed beam of light across the surface, retroreflecting the light beam and separating the...
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3891322 |
Method of locating the plane of sharp focussing of an image and apparatus therefor
A method of locating the plane of sharp focusing of an image. The method comprises the step of employing a scattering element to scatter image radiation incident thereon. The scattering element has...
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3883233 |
Automatic, recording refractometer
An automatic recording refractometer employs a pair of rotatable test figures, the image of one of which is projected into the retina of an eye being examined. The light from the retina then passes...
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3880502 |
Ophthalmological apparatus and process having independent astigmatic and spherical inputs
An apparatus and process for measuring optometric spherical and cylindrical optic correction to the eye is disclosed. Typically, two pairs of counter-rotating positive and negative cylindrical...
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3877788 |
Method and apparatus for testing lenses
Method and apparatus for performing a variety of tests on opthalmic lenses. The apparatus includes structure for directing a very narrow beam of light through one or more selected areas of the lens...
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3877815 |
MONITORING MEANS FOR MAKING HEADLAMP LENSES
A moulded lens for use in a headlamp, especially a road vehicle headlamp, the lens being formed in the moulding operation with a series of corrugations arranged to produce in use when the...
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3870415 |
METHOD AND MEANS FOR MEASURING THE REFRACTIVE PROPERTIES OF AN OPTICAL SYSTEM
Method and means for measuring the refractive properties of an optical system utilizing a rotatable ruling disposed to intercept a refracted light beam passing from the optical system under test....
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3869206 |
OPHTHALMOMETER DEVICE
A device for determining the topography of an optic including a support member having a measuring unit mounted thereon. The measuring unit includes an optical system having a target assembly...
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3861808 |
INSTRUMENT FOR MEASURING CURVED SURFACES
An instrument for measuring curved surfaces, such as lenses, by moire fringe patterns and keratometry is disclosed having a target pattern arch backlighted from a single light source to reflect the...
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3861048 |
COMPENSATED DIOPTER GAUGE
A diopter gauge having a large scale and associated indicator needle whereon one diopter is indicated by each complete revolution of the needle, a first small scale and indicator needle which...
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3841760 |
ZONAL FOCUS METHOD FOR DETERMINING THE AMOUNT OF ASTIGMATIC CORRECTION FOR AN OPTICAL SYSTEM
A zonal focus test used in the prior art to locate a principal meridian of an astigmatic optical system is adapted for use in determining the amount of astigmatic correction necessary for such an...
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3836256 |
INTERFEROMETER FOR TESTING TELESCOPE OPTICS
This is an interferometer of Twyman-Green type adapted for testing the optics of a stellar telescope. Coherent light from a source, such as a star, through the telescope is collimated and divided...
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3829219 |
SHEARING INTERFEROMETER
A shearing interferometer for producing a shearing interferogram of a wavefront being converged to a focal point. In a first embodiment in which the wavefront is comprised of monochromatic...
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3822096 |
METHOD AND APPARATUS FOR THE ENLARGED REPRESENTATION OF THE CROSS-SECTION OF NON-DESTRUCTED CONTACT LENSES OR THE LIKE
A method and apparatus for the enlarged reproduction of the cross-section of non-destroyed contact lenses or the like with the aid of a projection apparatus that includes a light source, a...
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3813169 |
DEVICE FOR DETERMINING POSITION AND FOCUS OF AN OPTICAL MEMBER
Apparatus for determining the alignment in the direction transverse of the optical axis of a lens and/or its focus. The apparatus includes a light beam generating means and means for providing...
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3810698 |
ANALYZER FOR SIMULTANEOUSLY DETERMINING THE RX, PHOTOCHROMIC, AND HARDENING CHARACTERISTICS OF LENSES
Instruments have been known which will determine the prism, cylinder power, and spherical power of an ophtholmic lens. My invention improves the existing optical instruments, in that my optical...
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3804523 |
RADIUSCOPE THICKNESS ADAPTOR
The embodiment of the invention disclosed herein is directed to a radiuscope thickness adaptor to be positioned on a support bed of a radiuscope for detecting the thickness of flexible hydrophilic...
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3797938 |
OPTICAL APPARATUS FOR MEASURING DEFORMATION OF PARABOLIC ANTENNAS
An optical apparatus for recording by double exposure either a hologram or a holographic contour map of a parabolic antenna. The holographic apparatus requires a laser and is arranged so as to...
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3794429 |
DEVICE FOR INSPECTING EYE-CONTACTING SURFACES OF CONTACT LENSES
A closed device in which interior illumination is wholly provided and controllable to dimly and diffusively illuminate a contact lens from above, and slantingly and more brightly illuminate it from...
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3791720 |
OPHTHALMOMETER HAVING ALTERNATIVE VIEWING AND MEASURING SYSTEMS AND INCLUDING AN IMPROVED ILLUMINATION SYSTEM
Ophthalmometer including a measuring circuit for measurement of the curvature of the cornea and contact lens curvatures with a built-in viewing circuit which is activated by the movement of a lever...
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3785733 |
METHOD OF CALIBRATING A GRAPHIC ARTS CAMERA
A graphic arts camera is calibrated by first determining the effective focal length of the lens employed therein, and by thereafter positioning the lens board and copy board at approximate...
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3779648 |
HYDROPHILIC LENS HOLDER
A lens holder including a "V" or "U" shaped support member mounted between two transparent plates, said support being so sized as to be capable of supporting without deformation a hydrophilic...
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3778164 |
OPHTHALMOMETER HAVING ALTERNATIVE VIEWING MEASURING SYSTEMS AND INCLUDING IMPROVED CONTACT LENS HOLDING MEANS
Ophthalmometer including a measuring circuit for measurement of the curvature of the cornea and contact lens curvatures with a built-in viewing circuit which is activated by the movement of a lever...
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3776638 |
VEILING GLARE MEASUREMENT SYSTEM AND METHOD
Photoelectric system and method for measuring the veiling glare from optical lens, such system comprising a pair of photosensitive devices disposed in a camera obscura and associated electrical...
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3776620 |
OPTHALMOMETER HAVING ALTERNATIVE VIEWING AND MEASURING SYSTEMS
Ophthalmometer including a measuring circuit for measurement of the curvature of the cornea and contact lens curvatures with a built-in viewing circuit which is activated by the movement of a lever...
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3771879 |
PROCESS AND APPARATUS FOR MEASURING TRANSPARENCY
Existing processes for testing the transparency of various materials involve observing patterns formed of series of black lines on a white background, through a sample of the material concerned....
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3761179 |
MIRROR TESTING APPARATUS
An apparatus automatically measures the reflecting surface of a mirror to evaluate its local flatness and its overall flatness. In one embodiment of the apparatus, two separate optical systems are...
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3743427 |
MODULATION TRANSFER FUNCTION MEASUREMENT SYSTEM AND METHOD
A constant speed rotating drum having a plurality of circumferentially spaced bar patterns of different discrete spatial frequencies is employed to measure the modulation transfer function (MTF) of...
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3740150 |
SURFACE MEASUREMENT BY INTERFEROMETER
An interferometer measures a test surface arranged in the test arm of the interferometer by using a focusing lens system movable along the test arm. The focusing lens system is adjustable along a...
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3736060 |
OPTICAL CONTOUR SCANNER
A knife-edge type optical testing instrument including a pinhole source and a knife-edge device superimposed into space by means of a beam splitter. A pinhole source is conducted to the beam...
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3734626 |
LIGHT APPARATUS FOR TESTING SURFACES
Apparatus for testing surface flatness of an object such as a magnetic disc. A laser light beam is reflected off the surface to be tested, is caught and returned by a corner cube reflector so that...
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3733135 |
METHOD AND APPARATUS FOR MEASURING IMAGE FORMING PROPERTIES OF AN IMAGE DISPLAY PANEL
Method and apparatus for measuring image forming properties of optical and lectro-optical systems in terms of modulation transfer function wherein the apparatus comprises a simple lens focussing...
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3723010 |
HOLOGRAPHIC METHOD AND APPARATUS FOR CHECKING THE OPTICAL CHARACTERISTICS OF TRANSPARENT MEMBERS
Coherent light as may be generated by a laser is passed through pattern forming means to generate a predetermined light pattern. This pattern of light passes through a standard or reference...
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3688673 |
LIGHT RECEIVING MEANS IN AUTOMATIC FOCUSING DEVICE
A light receiving optical means in an automatic focusing device used in a camera includes an optical image multiplier member disposed in a light receiving path for dividing and deflecting a light...
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3641350 |
INFRARED ANALYZER FOR INDICATING THE SCINTILLATION SPECTRUM, SHIMMER AND MODULATION TRANSFER FUNCTION OF THE RADIATION PATH
The radiant energy from a known live source impinges on a radiation coller which in turn directs the energy through a movable slit on to a rotating reticle having alternate reflecting and...
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3639041 |
SYSTEM AND METHOD FOR SCANNING THE DEPTH OF THE OPTIC FUNDUS
A system and method for obtaining a depth profile of the fundus of the eye in which first and second alternately excited light sources image an aperture on a portion of the optic disk. The...
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3614238 |
BRIGHT LINE RETICLE APPARATUS AND OPTICAL ALIGNMENT METHODS
Apparatus for use with an alignment instrument. The apparatus includes a bright line reticle with a dark field background, condenser means for directing radiant energy through the bright line...
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3614214 |
METHOD AND SYSTEM FOR TAKING PHOTOGRAPHS OF AN EYE FUNDUS
An optical system and method for photographing an eye fundus in which a fundus camera having a focus control is aligned with the position of an eyelens. An automatic optometer is coupled to the...
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3572939 |
PHOTOELECTRIC LENS BENCH AND METHOD FOR TESTING OPTICAL SYSTEMS
An improved method and apparatus for testing optical systems utilizing one or more cosine potentiometers to correct for errors resulting from perspective and magnification foreshortening or...
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3549240 |
OPTICAL FILTERING METHOD AND APPARATUS
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3544796 |
LENS CENTERING INSTRUMENT
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