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| Number | Title | Issue Date |
| 7217672 | Optical glass suffering little change in refractive index by radiation of light An optical glass wherein an amount of change in refractive index (Δn: difference in refractive index between a state before radiation and a state after radiation) caused by radiation of laser beam at wavelength of 351 nm having average output power of 0.43W, pulse ... | 05/15/2007 |
| 6852657 | Optical colored glasses The invention concerns an optical colored glass of the composition (in % in weight on oxide basis) SiO2 50-62; K2O 10-25; Na2O 0-14; Al2O3 0-2; B2O3 3-5; ZnO 13.5-37; F 0-1; TiO2 | 02/08/2005 |
| 6849114 | Dispersion comprising silicon/titanium mixed oxide powder, and green bodies and shaped glass articles produced therefrom Aqueous dispersion comprising silicon/titanium mixed oxide powder with a BET surface area of 5 to 500 m2/g which has been prepared by flame hydrolysis and has a titanium dioxide content of 0.5 to 20 wt. %, based on the powder, water and at least one pH-re... | 02/01/2005 |
| 6819860 | Optical amplifying glass and optical waveguide An optical amplifying glass comprising 100 parts by mass of a matrix glass and from 0.1 to 10 parts by mass of Er doped to the matrix glass, wherein the matrix glass comprises Bi2O3, at least one of B2O3 and SiO2 | 11/16/2004 |
| 6764972 | Mother glass composition for graded index lens A compositional range for a mother glass composition for graded index lenses which has a desired refractive index and is less apt to be devitrified and to develop cracks upon ion exchange was obtained by incorporating at least a given amount of one or more ingredien... | 07/20/2004 |
| 6667259 | Optical colored glass, its use, and an optical long-pass cutoff filter An optical colored glass with a composition (in percent by weight based on oxide) of SiO2 30-75; K2 O 5-35; TiO2 0-5; B2 O3 >4-17; ZnO 5-37; F 0.01-10 MI MIII Y2II | 12/23/2003 |
| 6587262 | UV synthetic silica glass optical member and reduction projection exposure apparatus using the same This invention provides a synthetic silica glass optical member used together with light having a specific wavelength of 250 nm or less, in which the difference between the maximum value and the minimum value of transmittance [%/cm] per cm in thickness fo... | 07/01/2003 |
| 6499317 | Synthetic quartz glass and method for production thereof A synthetic quartz glass for optical use, to be used by irradiation with light within a range of from the ultraviolet region to the vacuum ultraviolet region, which contains fluorine, which has a ratio of the scattering peak intensity of 2250 cm-1 | 12/31/2002 |
| 6461733 | Glass for a light filter and light filter Glass for a light filter capable of preventing variation of refractive index in a band-pass filter has a coefficient of thermal expansion within a range from 90×10-7 /° C. to 120×10-7 /° C. within a temperature range from -20° C... | 10/08/2002 |
| 6432854 | Optical glass for polarizing optical system, production process therefor and polarizing beam splitter An optical glass for polarizing optical system having a photoelastic constant C in the range of -0.2 to +0.5 [10-8 cm2 /N] with respect to a wavelength of 633 nm, the optical glass having the following composition (1): composition (1... | 08/13/2002 |
| 6413894 | Optical glass and optical product When a glass melt of an optical glass having a refractive index (nd) of at least 1.7 and an Abbe number (.nu.d) of 28 to 41 is flowed down from a flow pipe made of Pt or a Pt alloy to form glass gobs continuously, there is caused a p... | 07/02/2002 |
| 6395657 | Fluoride crystalline optical lithography lens element blank The invention provides a high quality identifiable fluoride crystalline optical microlithography lens element blank for formation into an lens element of a microlithography system. The highly qualified fluoride crystalline characteristics of the fluoride ... | 05/28/2002 |
| 6391810 | Lead- and barium-free crystal glass Lead- and barium-free crystal glass for the manual or machine production of high-grade glass objects with a refractive index higher than 1.52 and a density of at least 2.45 g/cc, wherein the crystal glass comprises the following components in weight perce... | 05/21/2002 |
| 6339505 | Method for radiation projection and lens assembly for semiconductor exposure tools A lens assembly with materials that densify and rarefy as a function of radiation dose. The lens assembly can be provided for use in photolithographic exposure tools. The combination of densifying and rarefying materials in the lens elements of exposure t... | 01/15/2002 |
| 6314766 | Apparatus for minimizing air infiltration in the production of fused silica glass Fused silica boules (19) having improved radial homogeneity are produced by controlling the air flow around the boule (19) during its formation. The boule is formed in a cup-like containment vessel (13) which collects silica particles from a plurality of ... | 11/13/2001 |
| 6284687 | High refractive index glasses, multifocal corrective lenses containing same The present invention relates to glasses of high refractive index having the following composition of oxides, expressed in percentages by weight: SiO2 29-35, B2 O3 0.5-5, Li2 O 0.5-3, Na2 O 4-8, K | 09/04/2001 |
| 6277776 | Fluorophosphate splice glass for joining optical fibers A low temperature fluorophosphate glass useful for joining single-mode fluoride and silica optical fibers includes 5 to 7 mol % InF3, 20 to 35 mol % PbF2 and 57.5 to 75 mol % P2 O5. An alkali for maintaining a l... | 08/21/2001 |
| 6251813 | Optical glass and its use An optical glass having properties of a high refractive index and low dispersion and having both a low sag temperature Ts and a low liquidus temperature L.T., is provided. The optical glass comprises, by % by weight, 25 to 42% of B2 ... | 06/26/2001 |
| 6223563 | Process for fabricating fluorine-doped sol-gel article The invention reflects discovery of a liquid phase doping technique that, unlike previous techniques, exhibits very little fluorine depletion upon subsequent heating. The invention involves the steps of providing a silica sol comprising a tetraalkylammoni... | 05/01/2001 |
| 6181469 | Optical member for photolithography, method for evaluating optical member, and photolithography apparatus In a method for evaluating the homogeneity of the refractive index of an optical member, the refractive index distribution of the optical member is measured, the measured refractive index distribution is separated into a rotationally symmetric element and... | 01/30/2001 |
| 5958810 | Optical glass with varying refraction index Optical glasses or lenses are described having a refractive index that varies as a function of at least one coordinate, which is made from a starting material with a constant refractive index by ion exchange. Greater index gradients than with the prior ar... | 09/28/1999 |
| 5952253 | Transparent apatite glass ceramics The present invention relates to a transparent glass-ceramic article which includes a glass matrix and a crystalline phase of apatite crystals in the glass matrix. The present invention further relates to a method of producing the transparent glass-cerami... | 09/14/1999 |
| 5951730 | Furnace for producing fused silica glass Fused silica boules (19) having improved off-axis homogeneity are produced by controlling the air flow around the boule (19) during its formation. The boule is formed in a containment vessel (13) which collects soot from a plurality of burners (14). The c... | 09/14/1999 |
| 5807417 | Nitrate-free method for manufacturing a blue glass composition The invention is nitrate-free method to manufacture a blue soda-lime-silica glass composition and improving the ultraviolet light absorption thereof while maintaining a high visible light transmission. The method comprises the steps of: adding colorants, ... | 09/15/1998 |
| 5764661 | Laser glasses and laser glass fibers Disclosed are laser glasses composed of a Ga--Na--S glasses doped with one or more kinds of activating ions, laser glass fibers comprising a core and a clad wherein the core is composed of the above-mentioned laser glasses of the present invention and opt... | 06/09/1998 |
| 5747397 | Optical glass High rare-earth content glasses (Ln2 O3 ࣙ20 mol %) have applications as high optical density wavelength-selective filters, faraday rotators, scintillation glasses and high index glasses. New glasses are formed by adding TiO2 | 05/05/1998 |
| 5723937 | Light-scattering coating, its preparation and use A light-scattering coating comprising light-scattering particles, such as alumina, dispersed in a silica matrix is formed by applying to the filter a silicone solution in which is dispersed colloidal silica and the light-scattering particles to a suitable... | 03/03/1998 |
| 5698484 | Method and containment vessel for producing fused silica glass and the fused silica blank produced Fused silica boules (19) having improved homogeneity are produced by causing the boule (19) to flow radially during its formation to achieve local mixing between portions of the boule which may have experienced different laydown conditions. The mixing is ... | 12/16/1997 |
| 5696038 | Boule oscillation patterns in methods of producing fused silica glass Oscillation/rotation patterns for improving the off-axis homogeneity of fused silica boules are provided. The patterns reduce the optical effects of periodic off-axis striae by decreasing the ratio of Ɗnstriae to Ɗzstriae, where Ɗ... | 12/09/1997 |
| 5668067 | High purity fused silica having high resistance to optical damage The invention relates to the production of high purity fused silica glass which is highly resistant to optical damage by ultraviolet radiation in the laser wavelength of about 300 nm or shorter. In particular, this invention relates to a fused silica opti... | 09/16/1997 |
| 5576253 | Oxynitride glass, method of preparing the same and glass fiber Transparent oxynitride glass has transmittance of at least 80%/mm in a wavelength region of 400 to 800 nm, with Si particles or Si alloy particles of not more than 1.0×109 /cm3 in number. Glass fiber prepared by drawing this glass c... | 11/19/1996 |
| 5523266 | Optical member of synthetic quartz glass for excimer lasers and method for producing same A synthetic quartz glass optical member for an ultraviolet laser, where the quartz glass has a hydroxyl content of 10-100 ppm, a chlorine content of 200 ppm or less, a hydrogen content of 1×1016 molecules/cm3 or less, a homogeneity ... | 06/04/1996 |
| 5364819 | Ultraviolet Faraday rotator glass A Faraday rotator glass composition based on a fluoride glass, phosphate glass, fluorophosphate glass or a mixture thereof is doped with a lanthanide in a concentration sufficient to provide a Verdet constant above at least 2870 deg/Tesla-meter [(1 m... | 11/15/1994 |
| 5364433 | Optical member of synthetic quartz glass for excimer lasers and method for producing same A synthetic quartz glass optical member for an ultraviolet laser, suitably applicable as a stepper lens of a lithographer using an excimer laser beam and other optical members, wherein the quartz glass has a hydroxyl content of 10 to 100 ppm, a chlorine c... | 11/15/1994 |
| 5349456 | Substrate having an active element array with low hydroxyl and chlorine A synthetic quartz glass substrate (1) supporting active elements is formed of high-purity synthetic quartz glass having, a hydroxyl group content of 200 ppm or below and chlorine group content of 50 ppm or below. The substrate (1) may have an impurity le... | 09/20/1994 |
| 5283212 | Thallium germanate, tellurite, and antimonite glasses This invention relates to thallium tellurite glasses possessing a high Verdet constant and high optical nonlinearity, as well as good visible and infrared transmission, making them suitable materials for the fabrication of active optical devices. The glas... | 02/01/1994 |
| 5283211 | Thallium germanate, tellurite, and antimonite glasses This invention relates to thallium germanate, tellurite, and antimonite glasses possessing high optical nonlinearity, as well as good visible and infrared transmission, making them suitable materials for the fabrication of active optical devices.... | 02/01/1994 |
| 5262365 | Quartz glass doped with rare earth element and production thereof Rare earth element doped silica glass according to the invention is prepared by doping silica-based glass co-doped with a rare earth element and aluminum additionally with fluorine and has excellent physical properties including remarkable light emission ... | 11/16/1993 |
| 5235662 | Method to reduce light propagation losses in optical glasses and optical waveguide fabricated by same The present invention provides a method of annealing optical glass layers, said method comprising the step of heating glass layers having an area greater than 0.01 cm2 to a temperature of between about 350 deg. C. and 1000 deg. C. in less than ... | 08/10/1993 |
| 5206189 | Sol-gel method for the preparation of monolithic multicomponent oxide glasses An improved method for the production of a monolithic multicomponent oxide glass is achieved by forming an oxide host gel by a sol-gel process, placing the host gel in an aqueous solution of a salt of at least one metal selected from the group consisting ... | 04/27/1993 |
