Stray-light analysis for multimodal miniature microscope

Junwon Lee; Jeremy D. Rogers; Chen Liang; Rebecca R. Richards-Kortum; Michael R. Descour

doi:10.1117/12.451324

16 October 2002 Stray-light analysis for multimodal miniature microscope

Junwon Lee, Jeremy D. Rogers, Chen Liang, Rebecca R. Richards-Kortum, Michael R. Descour

Proceedings Volume 4767, Current Developments in Lens Design and Optical Engineering III; (2002) https://doi.org/10.1117/12.451324
Event: International Symposium on Optical Science and Technology, 2002, Seattle, WA, United States

Abstract

Most conventional imaging systems suffer from unwanted and unexpected stray light that is often caused by reflections and scattering from optics and opto-mechanical features. This problem is easily missed during a design procedure that concentrates on improvement of imaging performance. The problem becomes apparent at the final step of production in most cases. If an imaging system consists of micro-optics, a stray light problem may become more difficult to solve due to the system's micro-scale size. The purpose of this stray light analysis is to improve imaging performance of the multi-modal miniature microscope (4M). The 4M device is a complete microscope on a chip, including optical, micro-mechanical, and electronic components. The 4M device is potentially a useful tool for early detection of pre-cancer due to its very compact size and capability for microscopic-scale imaging. Before actual fabrication of this device, however, we built the same geometry as the real 4M device in a commercial non-sequential ray tracing code and implemented stray light analysis of 4M device. Our findings indicate that most of the stray light in a 4M device is created by reflection from optics that are nominally supposed to be transparent. Due to a low signal level associated with the object, it is required to add high quality anti-reflection coatings on optics to achieve reasonable SNR.

Citation Download Citation

Junwon Lee, Jeremy D. Rogers, Chen Liang, Rebecca R. Richards-Kortum, and Michael R. Descour "Stray-light analysis for multimodal miniature microscope", Proc. SPIE 4767, Current Developments in Lens Design and Optical Engineering III, (16 October 2002); https://doi.org/10.1117/12.451324

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