Optimal design of a nonimaging projection lens for use with an LED source and a rectangular target

John C. Bortz; Narkis E. Shatz; David Pitou

doi:10.1117/12.402419

2 October 2000 Optimal design of a nonimaging projection lens for use with an LED source and a rectangular target

John C. Bortz, Narkis E. Shatz, David Pitou

Proceedings Volume 4092, Novel Optical Systems Design and Optimization III; (2000) https://doi.org/10.1117/12.402419
Event: International Symposium on Optical Science and Technology, 2000, San Diego, CA, United States

Abstract

Since their development in the mid-1960's, the luminous efficiency and range of available output wavelengths of light-emitting diodes (LEDs) have increased to such a degree that an enormous number of new applications for LED sources are now being pursued. For these applications, it is critically important to design the illumination optics to achieve high flux-transfer efficiency. In this paper we describe a nonimaging projection lens design to efficiently collect and transfer flux from a Hewlett-Packard LED source to a rectangular target at a distance from the Led and tilted with respect to the lens' symmetry axis. The source was experimentally characterized using a technique that captures its full four-dimensional luminance distribution. The lens was then designed by implementing a constrained global optimization procedure over a parametrization search space with variables that determine the positional and aspheric geometrical properties of the lens. The optimization was performed subject to constraints arising from packaging and fabrication considerations. The resulting lens employs a combination of refraction and total-internal reflection (TIR) mechanisms to achieve a total flux-transfer efficiency of 40%.

Citation Download Citation

John C. Bortz, Narkis E. Shatz, and David Pitou "Optimal design of a nonimaging projection lens for use with an LED source and a rectangular target", Proc. SPIE 4092, Novel Optical Systems Design and Optimization III, (2 October 2000); https://doi.org/10.1117/12.402419

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available