3637 results about "Optical glass" patented technology

A method for manufacturing a PU (polyurethane) polishing pad is provided. Resins containing active hydrogen functional groups such as polyol resins, polyamine resins, and polythiol resins, and polyisocyanate resins containing -NCO functional groups are mixed to form a foamed PU polishing pad with excellent polishing properties by reaction injection-molding under high pressure, low temperature and auxiliary gas-adding. The PU polishing pad in accompany with an abrasive slurry can be widely used to polish high-level products such as wafers and optical glass.

An image sensor package is provided including a substrate; a sensor chip; a plurality of bond wires for connecting the sensor chip to the substrate at predetermined locations; a sensor housing on the substrate for substantially encompassing the sensor chip, the sensor housing having a through-hole cavity defining an optical glass (IR filter) seat, the sensor housing defining an upper surface and an edge surface thereof; an optical glass (IR filter) on the optical glass (IR filter) seat; an encapsulation material for substantially encapsulating the upper surface and edge surface of the sensor housing, a corresponding surface of the substrate adjacent the edge surface of the sensor housing, and the side edge of the optical glass (IR filter); wherein the sensor housing is provided with a gas-exit allowing possible high temperature gas to exit; the encapsulation material forms an upper surface which is substantially aligned with a top surface of the optical glass (IR filter); the encapsulation material forms an upper surface which is lower than a top surface of the optical glass (IR filter); the sensor housing defines a profile shape, the profile shape has at least a step-wise configuration for facilitating and accommodating flowing of the encapsulation material; the sensor housing has a bottom surface adhered to the substrate by an adhesive; and a slot is provided on the bottom surface of the sensor housing for accommodating the adhesive.

The present disclosure provides for a method of controlling a plurality of independently controllable sections of one or more electrochromic devices belonging to a common interior space to provide lighting having a substantially color neutral or aesthetically pleasing spectrum to the interior space. The method comprises receiving a desired illuminance input indicating an amount of lighting desired in the interior space, and a neutral lighting input indicating a quantifiable amount of the sections of the electrochromic devices to be set to a high transmittance state. One or more sections of the electrochromic devices are selected in accordance with the neutral lighting input. The selected sections of the electrochromic device are set to the high transmittance state. The one or more electrochromic devices collectively transmit an amount of light into the interior space in accordance with the desired illuminance input.

The invention provides an environment-friendly optical glass with high refractive index, low dispersion and high light transmittance, which has components according to weight percentage: B2O3: 6 percent to 17 percent, SiO2: 2 percent to 10 percent, La2O3: more than 25 percent but less than 45 percent, Gd2O3: 5 percent to 25 percent, Nb2O5: 0 to 3 percent, Ta2O5: more than 19 percent but less than 27 percent, ZnO: 0 percent to 16 percent, BaO: 0 percent to 5 percent, CaO: 0 percent to 5 percent, SrO: 0 percent to 5 percent, ZrO2: 0 percent to 9 percent, Y2O3: 0 percent to 8 percent, Yb2O3: 0 percent to 8 percent, WO3: 0 percent to 5 percent, Li2O, Na2O and K2O: the total content of 0 percent to 2 percent, Sb2O: equal to 0.01 percent or less than 0.1 percent, SnO2: 0 percent to 1 percent. GeO2 is not included in the components of the environment-friendly optical glass and the refractive index is 1.85 to 1.90, while the Abbe number is 35 to 45. Meanwhile, the corresponding wavelength is below 440nm when the transmittance thereof is up to 80 percent, and the environment-friendly optical glass has high light transmittance.

Provided are an optical glass having high-refractivity, low-dispersion and anomalous partial dispersion properties, having excellent processability, being excellent as an anomalous partial dispersion glass for suppressing chromatic aberration, containing P5+, Al3+ and alkaline earth metal ions selected from the group consisting of Mg2+, Ca2+, Sr2+ and Ba2+ as essential cationic components and F− and O2− as essential anionic components, wherein the ratio of content of Ba2+ to the total content R2+ of Mg2+, Ca2+, Sr2+ and Ba2+, Ba2+ / R2+, is 0.01 or more but less than 0.5 on the basis of cationic %, and having an Abbe's number (νd) of 68 or more, optical glass having an Abbe's number (νd) of 68 or more, a partial dispersion ratio of 0.535 or more and a frictional abrasion of 500 or less and an optical glass which is to be polished in a polishing step for producing an optical element and which is a fluorophosphate glass having a frictional abrasion of 500 or less.

An optical glass having high refractivity and a low sag temperature and having a low-temperature softening property that enables precision press-molding is provided, and the optical glass contains, by mol %, 5 to 50% of B2O3, 3 to 50% of SiO2, 5 to 40% of TiO2, 1 to 40% of ZnO, 5 to 20% of La2O3, 0 to 10% of Gd2O3, 0 to 15% of Nb2O5, 0 to 10% of ZrO2, 0 to 5% of Ta2O5, 0 to 10% of Bi2O3, 0 to 10% of MgO, 0 to 8% of CaO, 0 to 10% of SrO, 0 to 10% of BaO, provided that the total content of MgO, CaO, SrO and BaO is 15% or less, 0 to 20% of Li2O, and 0 to 5% of Na2O, optionally containing Sb2O3 as a refining agent, and having a refractive index (nd) of 1.8 or more and an Abbe's number (vd) of 35 or less.