LED illuminator for a microdisplay projector

Simon Magarill

doi:10.1117/12.928453

19 October 2012 LED illuminator for a microdisplay projector

Simon Magarill

Proceedings Volume 8487, Novel Optical Systems Design and Optimization XV; 848707 (2012) https://doi.org/10.1117/12.928453
Event: SPIE Optical Engineering + Applications, 2012, San Diego, California, United States

Abstract

An illumination system for a microdisplay projector with a two-step imaging system is described here. In the first step, an imaging condenser creates an image of the LED at the color combiner entrance window. In the second step, we relay the image of the integrator exit window onto the micro-display. The illuminator demonstrates high collection efficiency, small footprint, and efficient mixing of light from RGB LEDs that provides required uniformity. A variety of approaches to collecting light emitted from LEDs of various types are compared, leading to the two-step design. A design example using a 0.55” diagonal DLP-based optical engine is presented with the following characteristics: Footprint: 3.9”x3.3”x2.0” (25.7 cubic inches) Light output: 338 white lumens Efficiency: 4.7 lm/watt

Citation Download Citation

Simon Magarill "LED illuminator for a microdisplay projector", Proc. SPIE 8487, Novel Optical Systems Design and Optimization XV, 848707 (19 October 2012); https://doi.org/10.1117/12.928453

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