Work at Umicore IR Glass has focussed in the production of chalcogenide glasses and optics by molding. The standard glass compositions are Gasir1 with Ge22As20Se58 and Gasir2 with Ge20Sb15Se65. An industrial process has been developed to produce these two glasses with constant properties. The reproducibility of refractive index is for example better than 1.5 x 10(-5) at 10 mum which is inside the precision of the measurements. An original and high precision molding technology has been developed to produce these low cost and high performance chalcogenide glass lenses. Spherical, aspherical and asphero-diffractive lenses have been obtained with very high surface precision. The form defect of the molded surface can be lower than 0.5 mum. Antireflection coatings have been deposited onto the molded lenses to reduce greatly the losses by reflection. 97% of transmission can be obtained with the antireflection coating, compared to about 70% of transmission for uncoated samples. The coated Gasir optics have been used in infrared camera and high-resolution thermal images have been obtained. (C) 2003 Elsevier B.V. All rights reserved. [References: 4]
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机译：Umicore红外玻璃的工作重点是通过模塑生产硫属化物玻璃和光学器件。标准玻璃成分是带有Ge22As20Se58的Gasir1和带有Ge20Sb15Se65的Gasir2。已经开发出工业方法来生产具有恒定性能的这两种玻璃。折射率的可再现性例如在10微米时优于1.5 x 10（-5），这在测量的精度之内。已经开发出一种原始的高精度成型技术来生产这些低成本，高性能的硫族化物玻璃镜片。已经获得具有非常高的表面精度的球面，非球面和球面衍射透镜。模制表面的形式缺陷可以小于0.5μm。防反射涂层已沉积在模制镜片上，以大大减少反射损失。使用抗反射涂层可获得97％的透射率，而未镀膜样品的透射率约为70％。镀膜Gasir光学器件已用于红外热像仪，并获得了高分辨率的热图像。 （C）2003 Elsevier B.V.保留所有权利。 [参考：4]
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