Share Email Print
cover

Proceedings Paper

Freeform micromachining of an infrared Alvarez lens
Author(s): Paul J. Smilie; Brian S. Dutterer; Jennifer L. Lineberger; Matthew A. Davies; Thomas J. Suleski
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

In 1967, Luis Alvarez introduced a novel concept for a focusing lens whereby two transmitting elements with cubic polynomial surfaces yield a composite lens of variable focal length with small lateral shifts. Computer simulations have demonstrated the behavior of these devices, but fabricating the refractive cubic surfaces of the types needed with adequate precision and depth modulation has proven to be challenging using standard methods, and, to the authors' knowledge, Alvarez lens elements have not been previously machined in infrared materials. Recent developments in freeform diamond machining capability have enabled the fabrication of such devices. In this paper, we discuss the fabrication of freeform refractive Alvarez elements in germanium using diamond micro-milling on a five-axis Moore Nanotech® 350FG Freeform Generator. Machining approaches are discussed, and measurements of surface figure and finish are presented. Initial experimental tests of optical performance are also discussed.

Paper Details

Date Published: 14 February 2011
PDF: 9 pages
Proc. SPIE 7927, Advanced Fabrication Technologies for Micro/Nano Optics and Photonics IV, 79270K (14 February 2011); doi: 10.1117/12.876159
Show Author Affiliations
Paul J. Smilie, The Univ. of North Carolina at Charlotte (United States)
Brian S. Dutterer, The Univ. of North Carolina at Charlotte (United States)
Jennifer L. Lineberger, The Univ. of North Carolina at Charlotte (United States)
Matthew A. Davies, The Univ. of North Carolina at Charlotte (United States)
Thomas J. Suleski, The Univ. of North Carolina at Charlotte (United States)


Published in SPIE Proceedings Vol. 7927:
Advanced Fabrication Technologies for Micro/Nano Optics and Photonics IV
Winston V. Schoenfeld; Jian Jim Wang; Marko Loncar; Thomas J. Suleski, Editor(s)

© SPIE. Terms of Use
Back to Top