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Class 351/232 - With light polarzing lens


Subclass of Class 351 - Optics: eye examining, vision testing and correcting
Definition: Subject matter wherein adjustable light polarizing means
No. of patents: 25
Last issue date: 03/11/2008


NumberTitleIssue Date
7341349Ophthalmologic apparatus and ophthalmologic chart
An optometric apparatus 2 according to the present invention comprises a body portion 5r provided with an optical system for a right eye for projecting a chart for the right eye in order to inspect visual function of both eye of an examinee and ...
03/11/2008
7306335Visual training method and visual training device
In a visual training device and a visual training method, different targets are displayed for right and left eyes, respectively, and refractivities of the right and left eyes are measured. Based on the measured refractivities of the eyes, positions of the targets di...
12/11/2007
7275823Optometric device
In an optometric apparatus of the present invention, optometric apparatus bodies 5l and 5r independently driven in right-and-left and up-and-down directions for optometry of an examinee 4, respectively, are provided on both sides o...
10/02/2007
7009769Correction of birefringence in cubic crystalline optical systems
A photolithography tool including an optical system for transmitting a beam of radiation toward a substrate is presented. The optical system includes a plurality of calcium fluoride lens elements, optically transmissive of the beam of radiation, each having respecti...
03/07/2006
6995908Methods for reducing aberration in optical systems
An optical system includes multiple cubic crystalline optical elements and one or more polarization rotators in which the crystal lattices of the cubic crystalline optical elements are oriented with respect to each other to reduce the effects of intrinsic birefringe...
02/07/2006
6947192Correction of birefringence in cubic crystalline optical systems
An optical system includes multiple cubic crystalline optical elements aligned along a common optical axis and having their crystal lattices oriented with respect to each other to minimize the effects of intrinsic birefringence and produce a system with reduced reta...
09/20/2005
6917458Correction of birefringence in cubic crystalline optical systems
An optical system includes multiple cubic crystalline optical elements aligned along a common optical axis and having their crystal lattices oriented with respect to each other to minimize the effects of intrinsic birefringence and produce a system with reduced reta...
07/12/2005
6664364Selenium-containing transparent optical material
There are herein disclosed a transparent optical material containing at least one selenium atom, a plastic lens comprising the transparent optical material, and methods for preparing them. In addition, there are also disclosed novel selenium-containing co...
12/16/2003
6482918Selenium-containing transparent optical material
There are herein disclosed a transparent optical material containing at least one selenium atom, a plastic lens comprising the transparent optical material, and methods for preparing them. In addition, there are also disclosed novel selenium-containing co...
11/19/2002
6303747Selenium-containing transparent optical material
A transparent optical material containing at least one selenium atom, a plastic lens comprising the transparent optical material, and methods for preparing them. In addition, there are also disclosed novel selenium-containing compounds represented by the ...
10/16/2001
6124424Selenized transparent optical material
A transparent optical material containing at least one selenium atom, a plastic lens comprising the transparent optical material, and methods for preparing them. In addition, there are also disclosed novel selenium-containing compounds represented by the ...
09/26/2000
6113238Glare demonstrator
A device for demonstrating the effect of glare and its reduction in which light is reflected onto a glare panel, to reflect therefrom at an angle of incidence such that it is horizontally polarized, producing glare to one viewing an underlying graphic but...
09/05/2000
5975702Method of using polarization differencing to improve vision
The present invention is directed to a system, which uses polarized light difference to improve vision. The system obtains an image at a first polarization direction. The system then obtains an image at a second orthogonal polarization direction. The seco...
11/02/1999
5638082Vision testing system for stereoscopic viewing by a test person
An image display system comprises polarization spectacles having different polarization axes with or without λ/4-foils of both polarization lenses forward of the eyes of the person to be tested. The system of the invention further includes an image displ...
06/10/1997
5629748Visual function examination apparatus including binocular fixation target
A visual function examination apparatus, comprising an optotype presenting device for presenting optotypes for use in examinations of visual functions of examinee's eyes, for examining visual functions of the eyes by delivering luminous flux via reflectin...
05/13/1997
5604280Ring spiro [fluorene-[2H]-benzopyranes] and their use in ophthalmic optics
The invention concerns photochromic compounds with general formula (I): ##STR1## where Ra, Rb and Rc represent hydrogen; alkyl, aryl, OR, SR, COR or COOR, where R represents hydrogen, alkyl or aryl, amino with formula...
02/18/1997
5530492Ophthalmological instrument for producing dichoptic stimuli on a visual display terminal
A method and system for presenting two successive images on a video display unit as a dichoptic stimulus of substantially equal intensity, wherein a first image is displayed at a predetermined intensity so as to be seen by a first eye of an observer only,...
06/25/1996
5381196Contrast sensitivity tester
A device for testing visual contrast sensitivity is disclosed whereby the contrast between a vectographically polarized test symbol and a reference background may be continuously varied by changing the direction of polarization of a polarization analyzer ...
01/10/1995
5331358Vision testing system for testing the sight function of a patient
A vision testing system includes polarization spectacles having different polarization axes with or without λ/4 filters for the two polarization lenses forward of the eye of the patient to be tested. This system also includes a vision testing apparatus f...
07/19/1994
4943151Scheiner-principle vernier optometer
In a preferred embodiment, the optometer apparatus includes: a pinhole apure plate having first and second horizontally positioned apertures disposed on opposite sides of a first optical axis; first and second orthogonally-oriented polarizing filters res...
07/24/1990
4826308Method and system for detecting, characterizing and monitoring optic nerve diseases
A method and system are provided for detecting, characterizing and monitoring eye diseases and, particularly, optic nerve diseases, by determining the difference in relative brightness sensed by the two eyes. The method utilizes eyeglasses having a pair o...
05/02/1989
4818091System and method of detecting visual field defects
A method and system are provided for detecting and monitoring the treatment of eye disease by determining the presence of visual field defects. The method utilizes eyeglasses having a pair of cross-polarizing lenses selectively adjustable for varying the ...
04/04/1989
4415243Optical test chart for testing binocular reading ability
An optical test chart for testing binocular vision. The chart has three lines of text, with the middle line printed or marked in letters or characters which have no polarizing effect. The line above this middle line is marked in letters or characters whic...
11/15/1983
4188097Method of and apparatus for testing visual integrity
A method of and apparatus for determining the visual integrity of an individual is disclosed. An equal amount of visible light intensity is provided to the right and left eyes by viewing a target through a binocular viewing mechanism. The eyes of the indi...
02/12/1980
4155632Method and apparatus for testing vision
The disclosure relates to a method and apparatus for testing eyesight in the presence of controlled varying degrees of contrast at a target which is being viewed. The contrast ratio of the illumination of the portion of a target having a series of test pa...
05/22/1979
 
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