摘要:
A glass substrate is for use in a WDM optical filter which has an optical multilayer coated on the glass substrate and is formed by glass which has a composition related to the optical multilayer so as to assure stable multiplexing/demultiplexing operation in the optical filter. The glass includes SiO 2 as a glass network-former and has an average linear thermal expansion coefficient between 100 x 10 -7 /K and 130 x 10 -7 /K within a temperature range between -30 °C and +70 °C. The glass may include TiO 2 , Al 2 O 3 , and R 2 O(R: alkali metal element) in addition to SiO 2 and may have a hardness suitable for the optical multilayer.
摘要:
A glass substrate is for use in a WDM optical filter which has an optical multilayer coated on the glass substrate and is formed by glass which has a composition related to the optical multilayer so as to assure stable multiplexing/demultiplexing operation in the optical filter. The glass includes SiO 2 as a glass network-former and has an average linear thermal expansion coefficient between 100 x 10 -7 /K and 130 x 10 -7 /K within a temperature range between -30 °C and +70 °C. The glass may include TiO 2 , Al 2 O 3 , and R 2 O(R: alkali metal element) in addition to SiO 2 and may have a hardness suitable for the optical multilayer.
摘要:
Disclosed are an optical fiber comprising a core and a cladding wherein the core is composed of a In-Ga-Cd-Pb halide glass and the clad composed of a halide glass possesses a refractive index of 1.515 or less, which has a large specific refractive index difference (Δ n) and a large numerical aperture, and such an optical fiber as mentioned above wherein the core contains one or more activating ions as well as an optical fiber amplifier comprising a pumping source, a laser glass fiber and a means for introducing pumping light and signal light into the above laser glass fiber, wherein the laser glass fiber is the optical fiber of the present invention mentioned above.
摘要:
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 optical fiber amplifiers comprising a pumping source, a laser glass fiber and a means for introducing pumping light and signal light into the laser glass fiber wherein the laser glass fiber is the above-mentioned laser glass fiber of the present invention. The laser glasses of the present invention show high radiative quantum efficiency and host glass stability and can be produced easily.
摘要:
Disclosed is an optical glass comprising, expressed as weight percentages, greater than or equal to 18 percent and less than 30 percent of SiO 2 , greater than or equal to 12 percent and less than 23 percent of BaO, 22 to 37 percent TiO 2 , greater than or equal to 7 percent and less than 16 percent Nb 2 O 5 , 5 to 20 percent of Na 2 O, 0 to 6 percent of K 2 O, 0 to 5 percent of CaO, 0 to 5 percent of SrO, 0 to 4 percent of ZrO 2 , 0 to 3 percent of Ta 2 O 5 , 0 to 1 percent of Sb 2 O 5 , and greater than or equal to 0 percent and less than 0.5 percent of P 2 O 5 , and by essentially not comprising PbO, As 2 O 3 , and F. The optical glass exhibits a refractive index (nd) greater than or equal to 1.80 and an Abbé number ( vd ) less than or equal to 30. A method of manufacturing a glass material for press molding is disclosed. This method comprises the steps of melting the glass starting materials, forming the glass melt obtained, and annealing the formed glass and is characterized in that: the glass melt has a composition such that, (1) when rapidly cooled to room temperature, said glass melt becomes glass that has a scattering coefficient of less than 0.005 cm -1 at wavelengths of from 400 to 2,500 nm or comprises crystals with a volumetric ratio of less than 10 -6 , and (2) when maintained for three hours at a temperature 10°C higher than the glass transition temperature, maintained for 10 min at a temperature yielding a viscosity of 10 4,5 to 10 3,5 dPa • s, and then rapidly cooled to room temperature, said glass melt becomes glass that has a scattering coefficient at at least one wavelength from 400 to 2,500 nm of greater than 0.01 cm -1 or comprises crystals with a volumetric ratio of greater than 10 -5 ; and an annealing of said formed glass is conducted at a temperature lower than the glass transition temperature.
摘要:
A process for producing a polarizing element which comprises steps of treating a mixture comprising (A) an alkoxysilane and/or a hexaalkoxydisiloxane, (B) water and (C) an alcohol by heating under a condition of at 40 to 120°C for 0.5 to 24 hours to prepare a coating solution for an alignment film, coating a substrate with the coating solution for an alignment film prepared above to prepare a sol-gel film, treating the sol-gel film by abrasion in a uniaxial direction to form an alignment layer having marks of abrasion in the uniaxial direction, aligning a dichroic coloring agent on the formed alignment layer by deposition to form a polarizing layer, and forming a protective layer for fixing the coloring agent on the formed polarizing layer. A polarizing element can be produced in simple steps, and separation of the polarizing layer in the steps of the production can be prevented.
摘要:
Disclosed is an optical glass comprising, expressed as weight percentages, greater than or equal to 18 percent and less than 30 percent of SiO 2 , greater than or equal to 12 percent and less than 23 percent of BaO, 22 to 37 percent TiO 2 , greater than or equal to 7 percent and less than 16 percent Nb 2 O 5 , 5 to 20 percent of Na 2 O, 0 to 6 percent of K 2 O, 0 to 5 percent of CaO, 0 to 5 percent of SrO, 0 to 4 percent of ZrO 2 , 0 to 3 percent of Ta 2 O 5 , 0 to 1 percent of Sb 2 O 5 , and greater than or equal to 0 percent and less than 0.5 percent of P 2 O 5 , and by essentially not comprising PbO, As 2 O 3 , and F. The optical glass exhibits a refractive index (nd) greater than or equal to 1.80 and an Abbé number ( vd ) less than or equal to 30. A method of manufacturing a glass material for press molding is disclosed. This method comprises the steps of melting the glass starting materials, forming the glass melt obtained, and annealing the formed glass and is characterized in that: the glass melt has a composition such that, (1) when rapidly cooled to room temperature, said glass melt becomes glass that has a scattering coefficient of less than 0.005 cm -1 at wavelengths of from 400 to 2,500 nm or comprises crystals with a volumetric ratio of less than 10 -6 , and (2) when maintained for three hours at a temperature 10°C higher than the glass transition temperature, maintained for 10 min at a temperature yielding a viscosity of 10 4.5 to 10 3.5 dPa • s, and then rapidly cooled to room temperature, said glass melt becomes glass that has a scattering coefficient at at least one wavelength from 400 to 2,500 nm of greater than 0.01 cm -1 or comprises crystals with a volumetric ratio of greater than 10 -5 ; and an annealing of said formed glass is conducted at a temperature lower than the glass transition temperature.
摘要翻译:公开了一种光学玻璃,其包含以重量%计,大于或等于18%且小于30%的SiO 2,大于或等于12%且小于23%的BaO,22至37%的TiO 2, 大于或等于7%且小于16%的Nb 2 O 5,5%至20%的Na 2 O,0至6%的K 2 O,0至5%的CaO,0至5%的SrO,0 至4%的ZrO 2,0至3%的Ta 2 O 5,0至1%的Sb 2 O 5,以及大于或等于0%且小于0.5%的P 2 O 5,并且基本上不 包括PbO,As 2 O 3和F.该光学玻璃的折射率(nd)大于或等于1.80,Abbé数(vd)小于或等于30.一种制造用于印刷的玻璃材料的方法 公开了成型。 该方法包括熔化玻璃原料,形成所得玻璃熔体并退火所形成的玻璃的步骤,其特征在于:玻璃熔体具有如下组成:(1)当快速冷却至室温时,所述玻璃 熔体变成波长为400〜2500nm的散射系数小于0.005cm -1的玻璃,或者包含体积比小于10 -6的晶体,和(2)在10℃下保持3小时 °C高于玻璃化转变温度,在温度为10 4.5〜10 3.5 dPa的温度下保持10分钟,然后迅速冷却至室温,所述玻璃熔体变为玻璃,其散射系数为 400至2500nm的至少一个波长大于0.01cm -1或包含体积比大于10 -5的晶体; 并且所述成形玻璃的退火在低于玻璃化转变温度的温度下进行。