摘要:
A glass material for mold pressing, comprising a core portion comprised of an optical glass with a degree of abrasion FA of 200 or higher and a covering portion comprised of a second glass covering at least a portion of the surface of said core portion. A method for manufacturing an optical glass element, wherein a glass material that has been preformed to a prescribed shape is heat softened and press molded with a pressing mold and the outer perimeter portion of the molded product obtained is removed by mechanical processing. The above-mentioned glass material for mold pressing is used as the glass material. To provide a means whereby an optical element does not bear scratches on optically functional surfaces through contact during handling after the press molding of press molded glass products despite being comprised of a glass material with a high degree of abrasion, and a means whereby even when scratched, the function of the optical element finally obtained is unaffected.
摘要:
A method for manufacturing an optical glass element, comprising: annealing a press-molded product obtained by press molding into a lens shape a glass material comprised of a core portion comprised of an optical glass (first glass) with a transition temperature of 550° C. or higher and a covering portion comprised of a second glass covering the surface of said core portion; and then removing the covering layer from the surface of the press-molded product to obtain an optical glass element. To provide a method for manufacturing high-optical-performance mold-pressed lenses in which the defective external appearance of optical elements comprised of high-temperature glass materials with a Tg of 550° C. or higher is prevented.
摘要:
An optical glass has optical constants represented by a refractive index (nd) of 1.46 to 1.58 and an Abbe's number (νd) of 65 to 74, has excellent hot preform shapeability, low softenability and excellent climate resistance, and comprises, by mol %, 45 to 65% of P2O5, 8 to 19% of Al2O3, 5 to 30% of MgO, 1 to 25% of a total of Li2O, Na2O and K2O, 0 to 16% of B2O3, 0 to 25% of ZnO, 0 to 25% of CaO, 0 to 25% of SrO, 0 to 30% of BaO, 0 to 10% of La2O3, 0 to 10% of Gd2O3, 0 to 10% of Y2O3, 0 to 10% of Yb2O3 and 0 to 10% of Lu2O3, and the total content of the above components of the optical glass is at least 95%.
摘要翻译:光学玻璃具有折射率(nd)为1.46〜1.58,阿贝数(nud)为65〜74的光学常数,具有优异的热成型性,低软化性和优异的耐气候性, 45〜65%的P 2 O 5,8〜19%的Al 2 O 3,5〜30%的MgO,1〜25%的Li 2 O,Na 2 O和K 2 O,0〜16%的B 2 O 3,0〜25的ZnO,0 至25%的CaO,0〜25%的SrO,0〜30%的BaO,0〜10%的La2O3,0〜10%的Gd2O3,0〜10%的Y2O3,0〜10%的Yb2O3,0〜 10%的Lu 2 O 3,并且光学玻璃的上述组分的总含量为至少95%。
摘要:
[Object] To provide a high-refractivity high-dispersion optical glass having excellent stability[Solution Means] An optical glass which is formed of an oxide glass containing 30 to 70 cationic % of Bi3+ and has a liquidus temperature of 800° C. or lower.
摘要:
A high-refractivity low-dispersion optical glass that gives press-molding preforms excellent in high-temperature shapability and suitable for precision press-molding, including an optical glass comprising B2O3, La2O3, Gd2O3 and ZnO as essential components, substantially containing none of lead and fluorine, having a refractive index (nd) of 1.72 to 1.83, an Abbe's number (νd) of 45 to 55 and a glass transition temperature (Tg) of 630° C. or lower and having a viscosity of at least 0.6 Pa·s at its liquidus temperature, and an optical glass comprising, by mol %, 45 to 65% of B2O3, 5 to 22% of La2O3, 1 to 20% of Gd2O3, provided that the total content of La2O3 and Gd2O3 is 14 to 30%, 5 to 30% of ZnO, 0 to 10% of SiO2, 0 to 6.5% of ZrO2 and 0 to 1% of Sb2O3, substantially containing none of lead and fluorine, and having a refractive index (nd) of 1.72 to 1.83 and an Abbe's number (νd) of 45 to 55.
摘要翻译:一种高折射率低分散度光学玻璃,其具有优异的高温成型性和适合于精密加压成型的压模成型预成型体,包括以B 2 O 3,La 2 O 3,Gd 2 O 3和ZnO为主要成分的光学玻璃,其基本上不含有铅 和折射率(nd)为1.72〜1.83,阿贝数(nud)为45〜55,玻璃化转变温度(Tg)为630℃以下,粘度为0.6Pa以上的氟。 以及含有摩尔百分比为45〜65%的B2O3,5〜22%的La2O3,1〜20%的Gd2O3的光学玻璃,条件是La2O3和Gd2O3的总含量为14〜30 %,5〜30%的ZnO,0〜10%的SiO 2,0〜6.5%的ZrO 2和0〜1%的Sb 2 O 3,基本上不含铅和氟,折射率(nd)为1.72〜1.83 阿贝数(nud)为45到55。
摘要:
A needle threader includes a flat handle portion and a thread-introducing loop portion extending from the handle portion. The thread-introducing loop portion includes a folded insertion edge at a tip for insertion into an eye of a needle. The thread-introducing loop portion includes a plate member having a first end, a second end, and a narrow band portion integrally connecting between the first and second ends. The narrow band portion has the folded insertion edge at a lengthwise center. The first end and the second end of the plate member are laid one on another and held in the handle portion. The narrow band portion is exposed from the handle portion to form the thread-introducing loop portion.
摘要:
The optical glass comprises equal to or greater than 5 mole percent of P2O5, has an Abbé number of equal to or greater than 58 and a glass transition temperature of equal to or less than 570 degree Celsius, and has an alkalinity resistance defined as a rate of weight reduction of equal to or less than 17 micrograms/(cm2·hour) when the surface of said optical glass which has been optically polished is immersed in 0.01 mole/liter of NaOH aqueous solution at 50 degree Celsius.
摘要翻译:光学玻璃包含等于或大于5摩尔%的P 2 O 5,具有等于或大于58的Abbé数,玻璃化转变温度相等 至570摄氏度以下,并且当所述光学玻璃的表面具有等于或小于17微克/(cm 2·小时)的重量减轻率的碱度电阻,其中 经光学抛光后,浸入0.01摩尔/升的NaOH水溶液中,摄氏50度。
摘要:
A high-refractivity low-dispersion optical glass that gives press-molding preforms excellent in high-temperature shapability and suitable for precision press-molding, including an optical glass comprising B2O3, La2O3, Gd2O3 and ZnO as essential components, substantially containing none of lead and fluorine, having a refractive index (nd) of 1.72 to 1.83, an Abbe's number (νd) of 45 to 55 and a glass transition temperature (Tg) of 630° C. or lower and having a viscosity of at least 0.6 Pa·s at its liquidus temperature, and an optical glass comprising, by mol %, 45 to 65% of B2O3, 5 to 22% of La2O3, 1 to 20% of Gd2O3, provided that the total content of La2O3 and Gd2O3 is 14 to 30%, 5 to 30% of ZnO, 0 to 10% of SiO2, 0 to 6.5% of ZrO2 and 0 to 1% of Sb2O3, substantially containing none of lead and fluorine, and having a refractive index (nd) of 1.72 to 1.83 and an Abbe's number (νd) of 45 to 55.
摘要翻译:一种高折射率低分散度光学玻璃,其具有优异的高温成形性且适用于精密加压成型的压制成型预成型体,包括含有B 2 O 3 O 3的光学玻璃, SUB>,La 2 O 3 3,Gd 2 O 3 3和ZnO作为必要组分,基本上不含有 铅和氟,折射率(nd)为1.72〜1.83,阿贝数(nud)为45〜55,玻璃化转变温度(Tg)为630℃以下,粘度为0.6Pa以上 以及其液相线温度的光学玻璃,以及包含摩尔%的45%至65%的B 2 O 3 3的光学玻璃,5至22%的La 2 O 3, 2 <3 O 3,1〜20%的Gd 2 O 3 3,条件是La 2的总含量 O 3 3和Gd 2 O 3 3为14〜30%,ZnO为5〜30%,0〜10% SiO 2 2,0〜6.5%的ZrO 2 2和0〜1%的Sb 2 O 3 3,实质上 不含铅和氟,折射率(nd)为1.72〜1.83,阿贝数(nud)为45〜55。
摘要:
A precision press-molding preform for producing an optical element for use in an imaging device using a CCD type or MOS type solid image-sensing device, which is formed of a glass composition containing, by mol %, 25 to 45% of P205, 0.5 to 10% of CuO, 0 to 10% of B203, 0 to 10% of Al203, 2 to 30% of Li2O, 0 to 25% of Na2O, 0 to 15% of K2O, the total content of Li2O, Na2O and K2O being 3 to 40%, 3 to 45% of BaO, 0 to 30% of ZnO, 0 to 20% of MgO, 0 to 20% of CaO, 0 to 20% of SrO, 0 to 10% of Bi2O3, 0 to 5% of La2O3, 0 to 5% of Gd2O3 and 0 to 5% of Y2O3, the total content of these components being at least 98%, and a precision press-molding preform, which is formed of a phosphate glass containing CuO, an alkali metal oxide, BaO and ZnO and having a BaO content/ZnO content molar ratio (BaO/ZnO) of greater than 1.
摘要翻译:一种用于制造用于使用CCD型或MOS型固体摄像装置的成像装置的光学元件的精密压制成型预成型体,其由含有摩尔%25%至45%的P205的玻璃组合物形成, 0.5〜10%的CuO,0〜10%的B2O3,0〜10%的Al2O3,2〜30%的Li2O,0〜25%的Na2O,0〜15%的K2O,Li2O,Na2O的总含量, K 2 O为3〜40%,3〜45%的BaO,0〜30%的ZnO,0〜20%的MgO,0〜20%的CaO,0〜20%的SrO,0〜10%的Bi2O3,0 至5%的La 2 O 3,0至5%的Gd 2 O 3和0至5%的Y 2 O 3,这些组分的总含量为至少98%,并且由包含CuO的磷酸盐玻璃形成的精密压制成型预成型体, 具有大于1的BaO / ZnO含量摩尔比(BaO / ZnO)的碱金属氧化物BaO和ZnO。
摘要:
A magneto-optical disk recording apparatus of the ZCAV recording type in which tracks are divided in a plurality of zones in the radial direction, comprises a data pattern generator for generating a recording data pattern signal synchronous with a reference clock, a frequency multiplier circuit for multiplying the reference clock by two, an OR gate for outputting a logical sum signal of an output from the multiplier circuit and the reference clock, and a recording pulse generating circuit including an AND gate for turning on/off a recording data pattern using an output from the OR gate as a gate output. With this structure, a recording pulse having a pulse width of 0.75 T with respect to the cycle T of the reference clock is generated synchronous with the reference clock.