Ultra-precision Float Polishing of Optical Materials
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Process Chain Modelling and Analysis for Computer Controlled Ultra-precision Polishing of Optical Freeform Surfaces
Computer Controlled Ultra-precision Polishing (CCUP) provides an enabling technology for machining freeform components with optical surface quality (i.e., nanometer surface roughness and sub-micrometer or accuracy). It can be used to machine difficult-to-machine materials such as optical glass which are not amenable for diamond machining. Due to the complexity of material removal mechanism in t...
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INTRODUCTION Hard and temperature resistant materials are used for mold manufacturing of optical glass lenses. These materials are not machinable by ultra precision diamond milling and turning processes. For example hardened steel or tungsten carbide can be ground in optical quality regarding shape but additional polishing is necessary to guarantee the high requirements for optical surface qual...
متن کاملPolishing Characteristics of ELID-Ground Surface of Nano Precision Optical Elements
This paper describes an ultra precision polishing method of aspherical mirrors, and the fundamental research on polishing characteristics. The aspherical mirrors with a diameter of about 30mm made by fused silica glass and CVD-SiC were ELID (electrolytic in-process dressing)-ground to high form accuracy with #4000 cast iron bonded diamond wheel, and then polished with a small polishing tool. As...
متن کاملUnit of Assessment: 13: Electrical and Electronic Engineering, Metallurgy and Materials Title of case study: Economic impacts of computer controlled polishing and metrology of ultra-precision surfaces
A unique UK national capability for large optics manufacture and associated technologies has been exploited. This case study describes the benefits realised from research into high precision surface-removal processes plus metrology, applied to large area functional surfaces producing precisions down to nanometres. Research into metrology for optical manufacturing, into increasing the dynamic ra...
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تاریخ انتشار 2004