Journal
OPTICS EXPRESS
Volume 21, Issue 3, Pages 3557-3572Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.21.003557
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Funding
- Simmons Family Foundation
- National Institute of Allergy And Infectious Diseases [U54AI057156]
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A novel method for fabricating lens arrays and other nonrotationally symmetric free-form optics is presented. This is a diamond machining technique using 4 controlled axes of motion - X, Y, Z, and C. As in 3-axis diamond micro-milling, a diamond ball endmill is mounted to the work spindle of a 4-axis ultra-precision computer numerical control (CNC) machine. Unlike 3-axis micro-milling, the C-axis is used to hold the cutting edge of the tool in contact with the lens surface for the entire cut. This allows the feed rates to be doubled compared to the current state of the art of micro-milling while producing an optically smooth surface with very low surface form error and exceptionally low radius error. (C) 2013 Optical Society of America
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