Low Softening Point Optical Glass
Low-softening-point optical glass is an environmentally friendly optical glass with a low softening point. The softening temperature of this type of glass is generally below 600°C, making it suitable for precision press molding. The lower forming temperature helps shorten the forming time and extend the service life of the molds. The company offers more than 20 types of low-softening-point optical glass, which are mostly used to produce aspherical preforms or aspherical optical elements.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Technical Information | Low softening point optical glass is generally produced at a reference annealing rate of 25°C/h. The nd and νd values provided on the certificate of conformity received with the product are data of a small sample annealed at 25°C/h and are not the same as the nd and νd of the actual glass. Because the cooling rate of the precision molding process is high, the nd of the product after precision molding is lower than the nd provided on the certificate based on annealing at 25°C/h; the degree of nd reduction depends on the glass type, the precision molding process and the product geometry. The company can adjust the nd of the glass appropriately according to customer requirements. Low softening point optical glass is produced based on a reference annealing rate of 25°C/h, and the allowable tolerances of the refractive index nd and the Abbe number νd are: refractive index nd: ±50×10^-5; Abbe number νd: ±0.5% |
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