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Low-temperature molding optical glass

A kind of optical glass and glass technology, applied in glass molding, glass pressing, glass manufacturing equipment, etc., can solve the problems of devitrification, high glass transition temperature, high liquidus temperature, etc., and achieve the effect of easy production

Inactive Publication Date: 2008-03-05
ASIA OPTICAL CO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] As can be seen from the above table, the embodiment No. 2002-173336 will lose clarity near the softening point, the liquidus temperature is high, and pulses are easy to occur during production; the embodiment No. 2001-058845 has a high liquidus temperature and is easy to produce Generate pulse; the embodiment of No. 1996-157231 has a high glass transition temperature, which is unfavorable for the service life of the mold in the precision molding process

Method used

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Embodiment Construction

[0014] In a preferred embodiment, the low temperature molded optical glass of the present invention, its main component includes P 2 o 5 、GeO 2 , Nb 2 o 5 、TiO 2 、 Bi 2 o 3 、WO 3 , SiO 2 , B 2 o 3 、Al 2 o 3 , Li 2 O, Na 2 O, K 2 O. Ta 2 o 5 and Sb 2 o 3 .

[0015] P 2 o 5 It is an essential component of the present invention and is the main component of the glass mesh structure. Phosphate glass has the advantage of lower melting point than silicate glass. When the proportion of its components is less than 9% by weight, the tendency of devitrification increases greatly, exceeding 25%. Otherwise, the desired high refractive index cannot be achieved. The optimum range of its composition by weight is 10% to 24% of the glass composition.

[0016] GeO 2 is an essential component of the present invention, and P 2 o 5 It is also the main component of the glass mesh structure, and it has a significant effect on increasing the refractive index. When the proport...

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Abstract

The low temperature molded optical glass consists of P2O5 9-25 wt%, GeO2 1-20 wt%, Nb2O5 12-28 wt%, TiO2 1-7 wt%, Bi2O 30-55 wt%, WO3 0-38 wt%, SiO2 0-3 wt%, B2O3 0-5 wt%, Al2O3 0-2 wt%, Ta2O5 0-3 wt%, Sb2O3 0-1 wt%, R2O not more than 13 wt%, where R is Li, Na and / or K, and XO not more than 15 wt%, where X is Ca, Sr, Ba and / or Zn. The low temperature molded optical glass contains no lead oxide, arsenic oxide and other environment harming components, and has easy production and no devitrification within the temperature range near the softening point.

Description

【Technical field】 [0001] The present invention relates to a low temperature molded optical glass, in particular to a low temperature molded optical glass with improved composition and high refractive index. 【Background technique】 [0002] As digital cameras and other optoelectronic products have higher and higher performance requirements and smaller and smaller size requirements, in order to meet such requirements, it is necessary to use aspheric surfaces and high-refractive index materials in the design of optical systems to achieve lightness and thinness. short purpose. To produce aspherical lenses, if the production is done by grinding, it is time-consuming, with low yield and high cost. Therefore, precision press molding technology has become the mainstream and indispensable production technology in recent years. [0003] Existing optical glass with low glass transition temperature discloses as Japanese Patent No. 7-247135 and No. 10-316448, and the glass composition di...

Claims

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Application Information

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IPC IPC(8): C03C3/253C03B11/08
Inventor 蔡宗岳石翔仁
Owner ASIA OPTICAL CO INC
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