Investigation of the Factors Affecting Surface Finish and Subsurface Damage in Optical Components
2018
Abstract In the fabrication of precision optical and opto-mechanical components by machining, the micro-crack structure generated under the surface is referred to as Subsurface Damage (SSD). SSD severely affects the quality and strength of an optical component thus reducing its life. One of the most prominent technique by which SSD can be eliminated or reduced is by Single Point Diamond Turning. In this study, factors (viz: tool feed rate, depth of cut, tool geometry, material properties etc.) which affects the performance of component by generating the SSD and degrading surface quality are discussed. Abbott-Firestone curve is used to study the SSD depth, morphology and to find the amount of deep valley that affect the quality and life of the component. During these experiments the surface roughness of 10 nm has been achieved.
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