Matches 151 - 200 out of 251 < 1 2 3 4 5 6 >
Match Document Document Title
5420698 Information transmission apparatus and image reading apparatus with selective movement and tilting of IR rejecting device  
An infrared-rejecting device is positioned in a light path and tilted thereto to reflect infrared radiation and to prevent infrared radiation from being applied to a photodetector or a line sensor...
5408489 Optical layer for excimer laser  
An optical layer and arrangements with such a layer are proposed which is predominantly of Ta 2 O 5 and having an absorption constant for ultra-violet light less than 0.0075 for light of 308 nm....
5400175 Ultraviolet radiation and blue light blocking polarizing lens  
A lens (10) that substantially blocks horizontally polarized light and selectively blocks wavelengths between 300 and 549 nanometers. The selective blocking is controlled by a sharp cut-on filter...
5387458 Articles exhibiting durable fluorescence with an ultraviolet screening layer  
Article comprising an ultraviolet screening screen layer and a color layer containing a defined daylight fluorescent dye dissolved in a defined polymeric matrix. The article exhibits durable...
5373392 Photochromic light control mirror  
A photochromic light control mirror comprises a photochromic substrate having a reflective film deposited at one side thereof. Alternatively, a mirror (i.e., a layer of glass having a reflective...
5355245 Ultraviolet protected electrochemichromic rearview mirror  
An ultraviolet protected, electrochemichromic rearview mirror assembly incorporating an electrochemichromic medium with reduced ultraviolet degradation is disclosed which may incorporate tinted...
5335099 Veiling glare control holographic windshield  
A zero-degree mirror reflection hologram is embedded into a vehicle windshield to reduce veiling glare. The hologram partially reflects sunlight in the visible wavelength range incident on the...
5313325 Blackbody material  
A light emitting article comprises a composite of carbon-bonded carbon fibers, prepared by: blending carbon fibers with a carbonizable organic powder to form a mixture; dispersing the mixture into...
5288231 Light shield for dental apparatus  
A light shield is provided for dental apparatus which shines light onto light curable material used to repair teeth. The shield is formed of a plastic material which substantially attenuates light...
5286979 Process for absorbing ultraviolet radiation using dispersed melanin  
This invention is a process for absorbing ultraviolet radiation in the atmosphere by dispersing melanin, its analogs, or derivatives into the atmosphere. By appropriate choice of melanin...
5251064 Lighting fixture reflector containing ultraviolet absorber  
Reflective, metalized plastic films for use in lighting fixture reflectors have improved performance when the plastic film upon which the metalization layer is deposited contains ultraviolet absorber.
5249076 Optical filter structure  
Provided is an optical filter structure which has excellent solarization resistance, and stably gives a constant wavelength distribution and constant irradiation energy for a long time, and which...
5243464 Damage tolerant light absorbing material  
A light absorbing article comprised of a composite of carbon-bonded carbon fibers, prepared by: blending carbon fibers with a carbonizable organic powder to form a mixture; dispersing the mixture...
5214345 Ultraviolet ray-shielding agent and tube  
An ultraviolet ray-shielding agent for selectively shielding ultraviolet rays while allowing a transmission of visible rays therethrough, comprising a visible ray-transmitting binder and extremely...
5204773 Ultraviolet light filter and filter system  
An ultraviolet light filter is provided by implanting an ultraviolet light absorbing chemical species into an ultraviolet light transmissive substrate. Two such filters having gradient...
5191468 Welder's helmet  
A welder's helmet (1) provided with a fast filter (3) which is controlled by welding light and through which the wearer of the helmet can see clearly in the absence of welding light. In accordance...
5187207 Melanin hydrophilic contact lenses  
A hydrophilic contact lens is disclsoed incorporating melanin that protects the eye from harmful radiation and superoxide.
5182670 Narrow band algan filter  
The invention is a filter device of at least two layers, the first layer of Al x Ga (1-x) N and the second layer of Al y Ga (1-y) N wherein x and y may have any value from 0 to 1. The invention...
5176854 Non-linear optical device  
According to the present invention, there is provided a non-linear optical device comprising a non-linear optical medium comprising an organic compound, which remarkably improves the non-linear...
5172278 Buckminsterfullerenes for optical limiters  
Optically sensitive materials (18) such as sensors or the human eye are passively protected against overexposure to high intensity light (20) in the visible region using a reverse saturable...
5170501 Welding mask to prevent orange flare and method of welding  
An improved welding mask glass to prevent orange flare is provided by utilizing as the glass in the lens a narrow bandpass green glass sold under Model S-8008N from Schott Glass Technologies, Inc.,...
5167875 Silver sulphide sol with ultrafine particle size  
An aqueous silver sulfide sol is prepared which has an absorption spectrum such that its optical density at 360 nm is at least 100 times its optical density at 700 nm. The sol is ultrafine in...
5124859 Narrow bandpass reflective optical filter  
A narrow passband, reflective optical filter at a wavelength L, has a container filled with a pressurized gas, the pressurized gas having a ground state transition corresponding to the wavelength L...
5115346 Anti-scatter, ultraviolet protected, anti-misting, electro-optical rearview mirror  
An electro-optic rearview mirror assembly is disclosed which is protected against scattering fragments while reducing risk of laceration if broken/damaged, against ultraviolet (UV) radiation...
5113281 Dual field of view optical system  
An optical system for transmitting light from an object in a dual field of view, the system comprising optical elements providing alternate optical paths associated with each of a wide and a narrow...
5103336 Multilayered security window structure  
A multilayered security window structure employs an electrically operated optical shutter disposed between protective outer polycarbonate layers. The outer polycarbonate layers protect the optical...
5036115 Optical lens system incorporating melanin as an absorbing pigment for protection against electromagnetic radiation  
Melanin is used as the absorbing pigment for radiation protective eyeware. Thus, a melanin-plastic copolymer was formed by adding a catalyst (benzoyl peroxide) to the liquid monomer, diethylene...
4933110 Optical radiation shield for protection from multiple lasers  
Optical light filters, useful for eye protection from laser radiation, are provided. The filter can absorb harmful radiation from lasers of several (at least six (6)) types which have a range of...
4929865 Eye comfort panel  
An eye comfort device for optically adjusting the focal distance for screen viewing of a video display comprising a transparent plate constituting a lens with a diopter vergence value in the range...
4885114 Metallized tetra((meso)-5-methyl-2-thiophene)porphines, platinum (5-bromo octaethylporphine) and optical filters containing same  
Transparent selective optical absorption filters of improved stability to ambient solar light and radiation in the near UV range are provided by incorporating metallized tetra...
4863238 Reflective marker for an object  
A reflective marker is disclosed for marking an object such as a highway pole, utility pole, transformer, and the like by reflective light. The reflective marker comprises a support layer, and a...
4846561 Monolithic optical power limiter based on two-photon absorption  
Collimated incident optical radiation which might contain high-intensity or igh-power radiation is focused into the body of a limiter by a first lens formed at one end of the limiter. The body is a...
4818491 Suntanning gauge  
A suntanning gauge is provided having a plurality of UV-light absorbing lenses of varying thicknesses affixed to a convenient-to-carry base. Under each lens is a fluorescent material which emits...
4799780 Aberrated suppressor mirror  
The invention described herein is a reverse wave suppressor mirror which is purposefully aberrated in order to decrease its sensitivity to tilt when compared to a conventional reverse wave...
4798427 Apparatus for use in sunbathing  
Apparatus for use in sunbathing comprises a screen formed of a sheet of thermoplastic material which is transparent to the safe UV-A wavelengths of solar radiation but which contains uniformly...
4793668 Sunbathing filter with incomplete UV-B absorption  
Apparatus for use in sunbathing comprises a screen formed of a sheet of thermoplastic or fiber material which is transparent to the safe UV-A wavelengths of solar radiation and the visible light...
4685783 Polychromic tetracyclo-spiro-adamatylidene derivatives, and polychromic lens incorporating said compounds  
A series of photochromic compounds are disclosed which have the property of undergoing a reversible color change when exposed to unfiltered sunlight and reverting to their original color in the...
4641187 Method for increasing contrast between an object and space when photographing such an object with a television camera  
A method of increasing the contrast when photographing a transparent object, such as a glass object through the use of a television camera, is provided. The transparent object is illuminated with...
4601532 Narrow band light absorbing filter  
An optical transmission radiation filter absorbing between 320 and 500 nm comprises a polymeric film having a benzylidene or naphthalamide dye in combination with a phenol-formaldehyde resin which...
4381136 Method for covering ultraviolet sources  
Disclosed is a method for covering a source emitting ultraviolet radiation which method comprises covering said source with an acrylic glass colored with a coloring agent which absorbs in the...
4279506 Photometric apparatus and methods for counting the particulate components of blood  
Photometric apparatus, for counting the particulate components in blood and for determining the degree of particulate agglutination, which comprises a cuvette for holding a blood bearing solution...
4155122 Light shield for welder's mask  
A welder's helmet has a window with an upper section of invariable light-attenuation characteristics and a dimmable lower section comprising an ultraviolet filter, an infrared filter, and an...
4125775 Solar simulator  
A solar simulator comprising an SnO 2 -containing glass ultraviolet absorption filter in combination with a xenon arc light source, which simulator closely approximates the characteristics of the...
T969004 Light-absorbing filters  
light-absorbing filters comprise a self-supporting polymeric film, such as an oriented polyethylene terephthalate film, containing or coated with a lacquer containing a compound which absorbs light...
3926658 Coating composition  
A liquid composition containing aluminium and titanium (20:1 to 1:20 weight ratio) optionally with phosphate, which forms hard, clear, ultraviolet absorbing coatings on heating to 100°-600°C.
3914469 METHOD OF CONTROLLING SOLAR HEAT AND LIGHT IN GREEN HOUSES  
A method of controlling the solar heat effect in glass and plastic covered greenhouses, and other windowed structures, consists of coating the greenhouses with an adhesive film consisting...
3911620 Materials with a specific photo-selectivity based on synthetic thermoplastic polymers and their use in the agricultural field  
A transparent or translucent sheet material (in the form of film or plates) for use in enclosing plant-growth environments (e.g. greenhouses) which is composed of a synthetic resin material to...
3815978 DURABLE SEE-THROUGH PHOTORESIST MASK  
A durable "see-through" photoresist mask is obtained by forming a layer of ruby on a sapphire substrate, and forming a layer of Cr 2 O 3 on the ruby. This combination of materials acts to...
3785722 USE OF SiO -NB O AND/OR Ta O GLASSES AS ULTRAVIOLET FILTERS  
Glass filters and their use in controlling transmission of radiation is disclosed. The filters have a sharp transmission cut off within the ultraviolet region of the spectrum and also withstand...
3743417 DURABLE TRANSPARENT MASK FOR PHOTOLITHOGRAPHICAL PROCESSING AND METHOD OF MAKING THE SAME  
An indefinitely reusable transparent mask suitable for photolithographic uses, particularly for the production of semiconductor elements preferably embodies a visually transparent image fused at...
Matches 151 - 200 out of 251 < 1 2 3 4 5 6 >