67 results about "Flint glass" patented technology

The invention establishes a vacuum carbon thermal reduction process applied in high added value and resource recycling of waste flint glass, and optimizes corollary equipment, direct to the current situations of serious environment pollution and resource recycling technology of the waste flint glass. The process has the characteristic that while reclaiming lead in the waste flint glass, the rest glass residue is formed into a good-quality environment-friendly building material through controlling conditions. Results of toxicity extraction experiments prove that extraction amount of lead and other heavy metals in a product is lower than the reference value of national regulation, and can be used as a light environment-friendly building material.

The invention provides environmental-friendly dense-lanthanum optical flint glass, comprising the following compositions in percentage by weight: 1 to 9 percent of SiO2, 15 to 30 percent of B2O3, 10 to 25 percent of La2O3, 10 to 30 percent of Nb2O5, 0 to 3 percent of Li2O, 0 to 6 percent of Na2O, 0 to 3 percent of K2O, 0 to 3 percent of MgO, 0 to 8 percent of CaO, 0 to 3 percent of SrO, 5 to 25 percent of BaO, 0 to 15 percent of TiO2, 0 to 10 percent of ZrO2, 0 to 3 percent of GeO2, 0 to 3 percent of WO3, 0 to 3 percent of P2O5, 0 to 3 percent of Gd2O3, 0 to 3 percent of Ta2O5, and 0 to 1 percent of Sb2O3. The optical flint glass has a refractive index between 1.81 and 1.90, an Abbe number between 25 and 33, and no PbO and As2O3, and has perfect optical property and excellent devitrification resistance.

The invention provides a dense lanthanum flint glass with a refractive index of 1.82-1.87 and an abbe number of 30-35. The glass has no apparent devitrification under the temperature of Tg+230 DEG C for over 30 minutes. The glass comprises, by mole percentage, LnO2(The LnO2 is one or more of SiO2, TiO2, ZrO2, Geo2 and CeO2), M2O3(The M2O3 is one or more of B2O3, La2O3, Y2O3, Yb2O3, Gd2O3, Ga2O3, Bi2O3, Al2O3 and Sb2O3), D2O5(The D2O5 is one or several substances of Nb2O5, Ta2O5 and P2O5) and RO. With a reasonable formula ratio design and on the precondition of guaranteeing the foreseeable optical property and performance, the flint glass is suitable for the production of high numerical aperture optical fibers and the glass elements which need heat treatment many times.

The invention relates to a low-cost broad-spectrum optical system of a day-night confocal trigger lens. The optical system is composed of a positive power first lens L1, a negative power second lens L2, a positive power third lens L3, a positive power fourth lens L4 and an optical low pass filter (OLPF) L5, wherein L1, L2, L3, L4 and L5 are sequentially distributed from the object to be shot to an image plane side along an optical axis, and the objects to be shot different in distance can be integrally moved through the lens to achieve clear imaging on the image plane portion. The optical system has the advantages of being capable of enabling visible wave band and near-infrared band to image clearly and simultaneously and being low in cost and suitable for batch production, and the lenses are all spherical lenses and made of common crown glass or flint glass.

The invention discloses a method for preparing colored glaze with waste flint glass as a raw material. The waste flint glass not only wastes the lead resource, but also has potential threats to human health and ecological environment, but no better method for treating the water flint glass exists. The method comprises the following steps of generally smashing the waste flint glass and grinding; then regulating the chemical components of the grinded waste flint glass; melting for 2-6 hours at high temperature of 750-980 DEG C; carrying out manual forming or mechanical forming according to a designed shape; sending the formed product into an annealing furnace for annealing, wherein the annealing temperature is 450-550 DEG C and the annealing time is 2-10 hours; and cooling to normal temperature so as to obtain the colored glaze. According to the method, the waste flint glass is taken as the main raw material for preparing the colored glaze, so that the method has the advantages that technological process is simple, raw material source is wide, energy consumption is low and the like, can be used for preparing colored glaze product with good gloss, low softening point and long material property, is applicable to the existing various colored glaze product factories in north and south and is beneficial to large-scale industrial production.

The invention relates to an interference color glass bead and a preparation method thereof. The interference color glass bead is characterized by comprising a spherical common glass flint glass substrate and metal oxide coatings sequentially coated on the outer surface; the metal oxide coating is one layer or more; thickness of each layer of metal oxide coating meets the following formula: 2nd + 1 / 2 lambda = k lambda; n represents the index rate of metal oxide; d represents the thickness of the coating; lambda represents wavelength of interference phase light wave and values from 350 to 770nm; and K is an natural number other than 0. The metal oxide coating on the outer surface of the interference color glass bead has advantages of smoothness, compactness, good reflection performance and diversified and adjustable color; and the preparation process is simple, and convenient for popularization and application.

The invention discloses a heavy lanthanum flint glass and a preform, an optical element, and an optical instrument. The heavy lanthanum flint glass is prepared from the following components in percentage by weight: 12 to 30 percent of SiO2, 10 to 25 percent of La2O3, 10.5 to 40 percent of TiO2+Nb2O5+WO3+Bi2O3 and 20 to 35 percent of RO and 0.5 to 10 percent of ZrO2, wherein the RO is one or more of BaO, CaO, MgO and SrO, and (SiO2+La2O3+ZrO2)/TiO2 is 0.75 to 6.5. The refractive index (nd) of the glass is 1.86 to 1.92 and the abbe number (vd) is 25 to 30; the heavy lanthanum flint glass can meet optical properties required by precision instruments and has the advantages of excellent anti-crystallization performance, low refractive index temperature coefficient and capability of effectivelyreducing thermal aberration caused by temperature difference.

A laser magnetometer of ring form is prepared as setting Faraday magneto-optic material to be rectangular form, utilizing two gain tubes being set with the same parameter and being set symmetrically to provide light amplification and to overcome Zeeman effect, applying crystal quarts to generate component on internal light path of Faraday magneto-optic material in circular polarization light laser and applying flint glass in length of several mm and thickness of a dozen mm as Faraday magneto-optic material.

The invention provides a method for preparing a colorful TiN film by utilizing direct current magnetron sputtering. The method comprises the following steps: (1) based on high-peed steel as a substrate material, grinding the substrate material by respectively using a flint glass paper and then a crocus paper, and then polishing until the surface of the substrate material is of a mirror plane; (2) immersing the processed substrate material into an ethanol solution to carry out ultrasonic excitation for 10-20 minutes, carrying out dipping bath with acetone, and drying with a blower; (3) then fixing the substrate material on a specimen holder of a vacuum precipitation chamber for film coating, pumping the vacuum at the back bottom before film coating to 3*10<-3>Pa, and carrying out ion bombarding on the surface to clean for 3-5 minutes; and (4) plating different TiN film specimens under the different nitrogen flows (precipitation pressures). The result shows that the nitrogen flow (precipitation pressure) has an important influence on the color of a decoration coating film, and the color of the TiN film layer can be effectively changed through regulating the nitrogen flow. In the method, the film layer color required in practicable production through changing the nitrogen flow.

An objective lens is configured of a first crown-glass lens and a second flint-glass lens, whereby it can exhibit substantially identical optical properties at a plurality of recording/reproducing light source wavelengths, particularly, in both 650 nm and 405 nm wavelength bands. Also, by maximizing the difference in glass transition point between the first and second lenses, one of the first and second lenses having a higher glass transition point is molded first, to allow that first molded lens to serve as a mold tool for molding the other lens. This dispenses with the steps of aligning and adhesive bonding the two lenses, whereby this objective lens can be used at a plurality of wavelengths as a single objective lens, and thus an information recording/reproducing apparatus can be of a simple configuration.

The invention provides a projection lens. The projection lens comprises a first lens group and a second lens group, wherein the first lens group is provided with negative diopter, is adjacent to an object side and comprises a first lens with negative diopter; and the second lens group is provided with positive diopter, is adjacent to an image side and comprises a second lens with positive diopter and a third lens with negative diopter; the second lens is disposed between the first lens and the third lens; the third lens is made of a dense flint glass material; the thermal variation parameter of the second lens is D0, and -3.0*e<-5><=D0<=-6.0*e<-7>.

A method of producing flint glass using submerged combustion melting is disclosed. The method includes operating a submerged combustion melter such that combustion products are discharged from one or more submerged burners combusting a combustible gas mixture that comprises fuel and oxygen. An oxygen-to-fuel ratio of the combustible gas mixture ranges from stoichiometry to 30% excess oxygen relative to stoichiometry, a temperature of a glass melt in the submerged combustion melter is between 1200° C. and 1500° C., a residence time of the glass melt is maintained between 1 hour and 10 hours, and a specific throughput rate of molten glass discharged from the submerged combustion melter ranges from 2 tons per day per meter squared of cross-sectional area of the submerged combustion melter [tons/day/m²] to 25 tons/day/m². A method of forming glass containers from the molten glass discharged from the melter is also disclosed.

The invention discloses dense-lanthanum flint glass and a prefabricated part thereof, an optical element and an optical instrument. The dense-lanthanum flint glass contains, in percentage by weight, 12-30% of SiO2, 0-10% of B2O3, 10-25% of Ln2O3, 10.5-40% of TiO2+Nb2O5+WO3+Bi2O3, 18-40% of RO and 0.5-10% of ZrO2, wherein the percentage of the B2O3 is not 0, the content of the Ln2O3 is a sum of thecontents of La2O3, Gd2O3, Y2O3 and Yb2O3, the RO is one or more of BaO, CaO, MgO and SrO, and RO/B2O3 is larger than 0 and smaller than or equal to 70. A refraction index nd of the glass is 1.86-1.92, an abbe number is 25-30, the optical performance required for the precise instrument can be met, and the glass is excellent in thermal refractive index coefficient and good in water resistance effect stability and acid resistance effect stability.

A converging composite lens with enhanced chromatic aberration comprising one or more converging lenses from flint glass, and one or more diverging lenses from crown glass. A dispersive composite prism with enhanced chromatic aberration, comprising two or more thin prisms, stacked one on atop another in alternating opposite directions, where the prisms in the first direction are produced from flint glass, and the prisms in the second direction are from crown glass. A color image sensor comprising color pixels with colors separated by such dispersive lenses or prisms. A concentric image pixel with concentric circular and ring shaped photo sensors.

The invention discloses a small-F number multi-wavelength standard spherical reference lens assembly. The small-F number multi-wavelength standard spherical reference lens assembly adopts the working wavelengths of 632.8 nanometers, 543.5 nanometers and 532 nanometers; achromatism of the lens assembly is achieved by using low-chromatic dispersion crown glass ZK7 and high-chromatic dispersion flint glass ZF6; the small-F number multi-wavelength standard spherical reference lens assembly adopts a three-piece lens design, and consists of a doublet positive lens, a negative lens, and a positive lens with a standard spherical surface as the last surface; the caliber, the F number and the top focal length design theoretical value of the reference lens assembly are 100mm, F/3 and 254.7mm respectively; except for the last mirror surface of the reference lens assembly, the other mirror surfaces are plated with three-point antireflection films with the wavelengths of 632.8 nanometers, 543.5 nanometers and 532 nanometers; through combination of the doublet positive lens and the negative lens, an approximately afocal feature of an optical structure is achieved, the sensitivity of the change of a coincidence error between a focal point and the curvature center of the last surface along with the change of a mirror spacing is reduced, and installation and adjustment of the small-F number standard spherical lens assembly are facilitated.

The name of the invention is an optical glass square blank preparation device and a blank preparation method, and belongs to the technical field of optical glass smelting one-step molding. The problems that an existing optical element blank material needs to be slit from a strip material, materials are wasted, and machining efficiency is affected are mainly solved. The device is mainly characterized by comprising a forming die, a die cooler, a traction machine, a pressing and cutting machine and an annealing furnace, wherein the groove width of the forming die is integral multiples of the width of a square blank to be machined; and the pressing and cutting machine is installed in the annealing furnace and is provided with a longitudinal pressing and cutting blade and a transverse pressingand cutting blade which are used for slitting according to the width and the length of the square blank to be machined. A square blank which can be directly used for secondary profiling or cold machining can be manufactured in the optical glass production link, the large block slitting procedure is omitted, cutting material waste is greatly reduced, and the production efficiency of secondary profiling or cold machining is improved. The device and the method are suitable for one-step molding of crown glass, flint glass, dense barium flint glass and part of lanthanide glass.

An apochromatic imaging system has an object-side lens group having at least an object-side lens element with positive refractive power and formed from a flint glass material with deviation of relative dispersion −0.013<ΔP_g,F<+0.013 and an Abbe number less than 50. A middle lens group has at least a second lens element and a third lens element, wherein, one of the second and third lens elements has deviation of relative dispersion −0.013<ΔP_g,F<0.013 and the other of the second and third lens elements has deviation of relative dispersion 0.013<ΔP_g,F<0.04. An image-side lens group has at least a fourth lens element.

The invention discloses heavy lanthanum flint glass, a prefabricated part and an optical element thereof, and an optical instrument. The heavy lanthanum flint glass comprises, by weight, 12-30% of SiO2, 10-25% of Ln2O3 (the content of Ln2O3 is the total content of La2O3, Gd2O3, Y2O3 and Yb2O3), 10.5-40% of TiO2+Nb2O5+WO3+Bi2O3, 20-35% of RO and 0.5-10% of ZrO2, wherein RO is one or more of BaO, CaO, MgO and SrO, the refractive index (nd) of the glass is 1.86-1.92, the abbe number (vd) of the glass is 25-30, and the crystallization upper limit temperature is 1200 DEG C or below. The glass can meet the optical performance required by a precise instrument, and is excellent in crystallization resistance, low in refractive index temperature coefficient, good in chemical stability and high in transmittance.

A projection lens assembly is provided. The projection lens assembly includes a first lens group and a second lens group. The first lens group has a negative dioptre and is disposed adjacent to an object side. The first lens group includes a first lens having a negative dioptre. The second lens group has a positive dioptre and is disposed adjacent to an image side. The second lens group includes a second lens having a positive dioptre and a third lens having a negative dioptre. The second lens is disposed between the first lens and the third lens. The third lens is made of heavy flint glass. A temperature coefficient of refractive index of the second lens is represented by D₀, and −3.0×e⁻⁵≦D₀≦−6.0×e⁻⁷. A projection apparatus is also provided.

The invention discloses a long-pupillary-distance and shortwave infrared spectral imaging objective lens. The objective lens comprises five optical lenses which are sequentially arranged on a system optical axis from a light bar to an image surface. An achromatism glass pair with the focal power of positive, negative and negative is formed by the first three optical lenses. A very good achromatism capability is achieved on the short wave infrared outer section through the combination of fluoride glass and dense flint glass, and meanwhile a high spectrum transmittance rate is achieved. The fourth optical lens is used for balancing astigmatism and the curvature of field of the system to increase the view field capability of the imaging objective lens. The fifth optical lens is used for further compensating for the astigmatism of the objective lens and meanwhile is used for meeting the requirement of the imaging objective lens for telecentric performance in image space. Finally, the requirement for the achromatism in the long papillary distance and shortwave infrared band can be met.