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Chemically strengthened optical glass

A kind of optical glass and chemical technology, which is applied in the field of preparation of chemically strengthened optical components, can solve the problems of not providing high refractive index glass with improved mechanical strength

Pending Publication Date: 2022-05-24
SCHOTT GLASS TECH (SUZHOU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] None of the above mentioned documents provide a high-refractive-index glass with improved mechanical strength and reproducible optical performance, which is essential for optical components in challenging environments

Method used

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  • Chemically strengthened optical glass
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Examples

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Comparison scheme
Effect test

example 1

[0154] a) Chemical strengthening of optical components

[0155] Samples of optical glasses E1 to E5 according to the invention and comparative optical glass C1 with dimensions 30*30*1 mm were chemically strengthened by the following procedure:

[0156] 1) Fully immerse the sample in molten KNO 3 in a salt bath at 420°C for 5 hours.

[0157] 2) Clean chemically strengthened samples (after cooling to room temperature) with deionized water.

[0158] b) Test method

[0159] 1. Drop the ball

[0160] Use a steel ball with a diameter of 20mm and a mass of 32.65 grams to hit a chemically strengthened optical component of 30*30*1mm at the center position. The glass samples were mounted on a 30*30mm PMMA jig with a 1mm wide inner stage to support the sample. The rest of the fixture is blank. The drop height starts from 50mm. After each impact, if the glass is not broken, the height of the falling ball is increased by 25mm, and then it is dropped again to impact the sample until ...

example 2

[0178] a) Chemical strengthening of optical components

[0179] Provided is a polished wafer composed of E6 optical glass with a thickness of 0.6mm and high-quality polished surfaces on both sides.

[0180]E6 contains the following ingredients (mol%):

[0181]

[0182] Samples for four-point bending test were prepared from polished wafers by CNC technology to cut the wafers into samples with dimensions of 60*20*0.6 mm by CNC technology. The samples were chemically strengthened by the following procedure:

[0183] 1) Fully immerse the sample in molten KNO 3 in a salt bath and kept at 430 °C for 6 h.

[0184] 2) After cooling to room temperature, clean the sample with deionized water.

[0185] b) Test method

[0186] Four-point bending test according to DIN EN 1288-3. The sample is placed on two support pins spaced a set distance apart and two loading pins placed at equal distances around the center. Both loads are lowered at a constant rate from above until the sample...

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Abstract

The present invention relates to a chemically strengthened optical component comprising an optical glass having a depth of layer (DoL) of 1.0 [mu] m to 50.0 [mu] m. The refractive index nd of the optical glass is at least 1.65, preferably at least 1.70, and the optical glass comprises at least 5 mol% of Li2O, Na2O and K2O or a combination of at least two of Li2O, Na2O and K2O. The invention also relates to a preparation method and application of the chemically strengthened optical component.

Description

Technical field [0001] The present invention relates to a chemically strengthened optical component, which includes optical glass with a layer depth (DoL) of 1.0 μm to 50.0 μm, wherein the optical glass has a refractive index n d is at least 1.65, preferably at least 1.70, and the optical glass contains at least 5 mol% Li 2 O.Na 2 O or K 2 O or a combination of at least two of them. The invention also relates to a preparation method of chemically strengthened optical components and its application. Background technique [0002] Chemical tempering is a well-known process for increasing the mechanical strength of soda-lime glass, aluminosilicate glass, lithium aluminosilicate or borosilicate glass, for example, used as cover glass for display applications. [0003] To achieve chemical tempering, the glass article is placed in at least one special molten salt bath with a predetermined temperature for a defined time. During the tempering process, ion exchange occurs on the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/076C03C3/062C03C3/064C03C21/00
CPCC03C3/076C03C3/062C03C3/064C03C21/002C03C3/097C03C4/18C03C2204/00
Inventor 李毅刚卞海溢S·M·里特
Owner SCHOTT GLASS TECH (SUZHOU) CO LTD