Transient thermal response of DMD (digital micromirror device) with pulsed laser illumination

Scott P. Overmann; Mike McCormick

doi:10.1117/12.2655977

15 March 2023 Transient thermal response of DMD (digital micromirror device) with pulsed laser illumination

Scott P. Overmann, Mike McCormick

Proceedings Volume 12435, Emerging Digital Micromirror Device Based Systems and Applications XV; 1243509 (2023) https://doi.org/10.1117/12.2655977
Event: SPIE OPTO, 2023, San Francisco, California, United States

Abstract

Temperature calculations of Texas Instruments' DMD (Digital Micromirror Device) are well known under CW (continuous wave) optical exposure conditions and are described in existing DMD datasheets. However, application spaces are being developed which require the use of pulsed lasers as the illumination source, complicating the DMD temperature calculations. Certain combinations of laser power, pulse widths, and pulsing repetition rate result in acceptable mirror surface temperature while others can create an unreasonable thermal load well outside of acceptable DMD parameters. This paper details transient thermal calculations at the mirror surface, bulk mirror, and silicon die locations using the DMD thermal (RC) time constants along with laser peak power, pulse width, and repetition frequency to help define acceptable operating conditions and avoid conditions outside the capability of the DMD. Pulse widths spanning from continuous to femtosecond and the resulting maximum mirror surface temperature are shown along with the transient temperature profile to understand the response of the mirror.

Conference Presentation

Citation Download Citation

Scott P. Overmann and Mike McCormick "Transient thermal response of DMD (digital micromirror device) with pulsed laser illumination", Proc. SPIE 12435, Emerging Digital Micromirror Device Based Systems and Applications XV, 1243509 (15 March 2023); https://doi.org/10.1117/12.2655977

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