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Fluorophosphate glasses

A technology of fluorophosphate glass and glass, which is applied in the direction of glass furnace equipment, glass manufacturing equipment, manufacturing tools, etc., and can solve the problem of chromatic aberration reduction and other problems

Active Publication Date: 2012-09-05
SCHOTT AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the chromatic aberration will be reduced

Method used

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  • Fluorophosphate glasses
  • Fluorophosphate glasses
  • Fluorophosphate glasses

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0077] Table 1: Examples of melting of glass calculated for 100 kg (according to Example 1)

[0078]

[0079] To produce 100 kg of fluorophosphate filter glass having the composition of Example 1, the glass mixture was deeply mixed according to the synthesis method in Table 1. The mixture was melted at 950°C for about 3 hours, and oxygen gas was sparged therein for about 30 minutes. Due to its low viscosity, the clarification step is also performed at 950°C. After keeping it for about 15 to 30 minutes, casting is carried out at a temperature of about 940°C.

[0080] Table 1 shows the transmission spectra of the glasses according to the invention (Example Glass 1), demonstrating that these glasses have excellent light filtering properties. These transmittances relate to a sample thickness of 0.35 mm. The abscissa in the figure is the light transmittance, and the ordinate is the wavelength.

[0081] figure 2 The corresponding transmission spectra for example glasses 7 a...

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Abstract

Glass having an optimized degree of cross-linking of the phosphate component in the glass matrix is provided so that excellent weatherability is achieved. These glasses are fluorophosphate glasses that contain copper oxide as colouring component. The glasses can further contain colouring components and are obtainable in a method that includes a bubbling step.

Description

technical field [0001] The present invention relates to fluorophosphate glasses which are colored blue for use as filter glasses. Background technique [0002] The glass according to the invention is a so-called optical bandpass filter, thus a filter with a wavelength range (transmission range) of high light transmission to a greater or lesser extent, which is defined by Surrounded by two filter attenuation bands. This glass can be used in optical glass filters, such as color correction filters in color video cameras and digital cameras. In addition to a high degree of transparency between 350 and 650 nm, generally the glasses according to the invention have steep edges in the adjacent UV and have very low transmittance above 700 nm. At the same time, the UV range should be blocked as far as possible, e.g. to avoid damage to sensitive electronic components by high-energy radiation, and in the range above 700 nm the intensity of the incident radiation should be attenuated s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/247C03C4/08
CPCC03B5/173C03B5/193C03C3/247C03C4/02C03C3/17G02B5/20
Inventor 西蒙·里特尔比安卡·施雷德乌特·韦尔费尔斯蒂芬尼·汉森
Owner SCHOTT AG
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