Optical modeling of UHP lamps

Holger Moench

doi:10.1117/12.479651

16 August 2002 Optical modeling of UHP lamps

Holger Moench

Proceedings Volume 4775, Modeling and Characterization of Light Sources; (2002) https://doi.org/10.1117/12.479651
Event: International Symposium on Optical Science and Technology, 2002, Seattle, WA, United States

Abstract

Short arc lamps are a key component for projection systems to achieve highest efficiency for small display sizes. Consequently UHP-lamps are now standard for high efficient projection systems. UHP lamps combine a very high luminance with a good spectrum and lifetime. The optical performance of UHP lamps can be further improved: A dichroic coating on one half of the UHP burner is applied to focus all light into one hemisphere. This allows for extremely compact reflector systems and an improvement by 20-30% in light collection. The design of projection optical systems requires reliable optical models of the light source. Two different approaches for the model description of lamps will be presented. 1) A physical model based on the geometrical description of all surfaces of the lamp. Volume emitters are used to describe the light generation. 2) A model based on high resolution goniophotometric measurements of the light source. Simulations using both types of models are verified by measurements and the benefits and shortcomings of both approaches are discussed. Special emphasis will be placed on the role of the light bulb as the first optical element in the system. The relatively thick quartz bulb of these high pressure lamps acts as a lens and shapes the beam of light.

Citation Download Citation

Holger Moench "Optical modeling of UHP lamps", Proc. SPIE 4775, Modeling and Characterization of Light Sources, (16 August 2002); https://doi.org/10.1117/12.479651

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