Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/16891
Title: A Study on the Development on Tunable Opto-Fluidic Devices by Diamond Turning and Soft Lithography
Authors: LEUNG HUI MIN
Keywords: Diamond turning, liquid lens, soft lithography, optics, aberration correction, high precision machining
Issue Date: 7-Aug-2009
Source: LEUNG HUI MIN (2009-08-07). A Study on the Development on Tunable Opto-Fluidic Devices by Diamond Turning and Soft Lithography. ScholarBank@NUS Repository.
Abstract: High precision single point diamond machining methods, namely turning and shaping using diamond inserts, are combined with a rapid prototyping technique known as soft lithography to develop an efficient and affordable fabrication process to obtain various types of liquid tunable lenses. They include diffractive/refractive hybrid lens with reduced chromatic aberration, aspherical lens with reduced spherical aberration, toroidal lens with increased depth of focus and double focusing lens. Lithography and etching techniques suffer from limitations such as being only able to produce shallow stepped profiles. This makes it difficult to fabricate micro-optical elements with high efficiencies. In contrast, diamond turning can produce continuous profiles with depths greater than 700 microns. Furthermore, features in the order of microns to centimeters can be simultaneously fabricated on a suitable substrate material without compromising the excellent quality of the optical surfaces. Thus, diamond turning is a suitable method to produce compact lenses with high performance.
URI: http://scholarbank.nus.edu.sg/handle/10635/16891
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