Matches 151 - 190 out of 190 < 1 2 3 4
Match Document Document Title
4165920 Echo reduction improvement in a front face glare reduction overlay  
An overlay for use on a transmission screen is disclosed which reduces front face glare by providing a plurality of inclined surfaces on the front surface thereof to deflect ambient light away from...
4156209 Lens free of back focal points for use with high power light beams  
A meniscus lens is disclosed for use in high power light beam applications, such as in the optics of a high power laser where the laser beam intensity is in excess of one megawatt per square...
4108488 Vehicle front having asymmetrical windshields  
An improved windshield for a transit vehicle. The windshield comprises a pair of windshield sections horizontally separated by a vertical divider. Each of the windshield sections are positioned at...
4070100 Filter for partially transmitting light  
A filter comprises a plurality of quadrilateral filter units arranged one after another, each of which is made of two right-angled prisms whereby the incoming light is partially transmitted or...
4032222 Controlled reflection readout for digital displays  
The present disclosure is directed to a controlled reflection readout for light emitting information displays for such apparatus as computers, compasses, watches, clocks and consoles wherein the...
4012115 Sawtooth shaped front screen  
A transparent front projection screen is disclosed having a plurality of ridges on the back thereof interrupted by flat portions and a plurality of curved sawtooth shaped ridges on the front...
3984157 Coaxial opthalmoscope arrangement  
An improved coaxial ophthalmoscope incorporating a light trap for absorbing substantially all of the light not utilized for illuminating the retina of the eye under examination and thereby...
3940896 Solar radiation and glare screen and method of making same  
A sun reflector formed by a carrier of transparent sheet material and internal louvers for use in a window panel is disclosed. The louvers are inserted across the width of the carrier and on...
3897033 Low glint helicopter canopy structure  
A helicopter canopy structure is provided to minimize the risk of detection of glints at long range by observers on the ground. The canopy includes a top window and front windshield constructed of...
3744893 VIEWING DEVICE WITH FILTER MEANS FOR OPTIMIZING IMAGE QUALITY  
A device for viewing an image projected onto a front surface screen comprises a housing provided with a viewing opening and within which said screen is mounted. Filter means is arranged within the...
3718078 SMOOTHLY GRANULATED OPTICAL SURFACE AND METHOD FOR MAKING SAME  
A method for forming a light-scattering surface in which the surface, made from a soluble material, is sprayed with droplets of a volatile solvent. After the droplets evaporate, the surface is...
3712713 OPTICAL SHIELD OF TRANSPARANT INTERMESHED GROOVED PANELS USEFUL ON OVERHEAD PROJECTS  
A glare control shield having particular utility in an overhead projector, consists of fully transparent matching grooved plates which are disposed between stage and Fresnel condensing lens of the...
3699471 STRAY RADIATION SUPPRESSION DEVICE  
A series of fences are placed across the side walls of a flow channel forming the optical cavity of a gas dynamic laser which contains the gas dynamic laser flow therein and are positioned between...
3582189 AMBIENT LIGHT FILTER FOR A TELEVISION RECEIVER  
A light-masking device for improving the contrast of a television image under conditions of high ambient light comprises an optical filter having a grid of parallel alternately opaque and...
3511560 AMBIENT LIGHT FILTER  
3511563 PROJECTOR  
3473534 COILABLE SUN BLIND OF SEEING THROUGH TYPE  
3453039 COMPOSITE LIGHT TRANSMITTING AND LIGHT REFLECTING PANELS AND THE LIKE  
3438699 OPTICAL CONTROL OF SUNLIGHT AT WINDOW AND DOOR OPENINGS WITH CONTROLLED POSITIONING OF COMPOSITE TRANSPARENT MATERIALS TO ELIMINATE GLARING SUNLIGHT RAYS WHILE PROVIDING NORMAL DAYLIGHT ILLUMINATION  
3413460 Optical anti-dazzling device  
3402981 Glare reduced light ray screen  
3393034 Light transmitting panel  
3390447 Method of making laminar mesh  
3341391 Spherical shaped plastic filter for cathode ray tube  
3336714 Solar cell  
3329461 Headlight deflector  
3279313 Projector screens and method and apparatus for using same  
3226729 Eye shield  
3218924 Rear projection screen  
3133139 Directional glare reducing viewing device  
3129895 Shielding prism  
3129285 Television receiver  
3057256 Optical screen  
3037419 Directional light-transmissive screen  
2991693 Front projection screen  
2976759 Anti-glare device for vehicles  
2941441 Anti-glare instrument panel  
2888007 Windows for admitting solar radiation  
2878714 Glare reducing device  
2837006 Angular discriminating optical viewing device  
Matches 151 - 190 out of 190 < 1 2 3 4