Title

Dmd-Based Infrared Scene Projection: A Comparison Of Mwir And Lwir Modulation Transfer Function

Keywords

Infrared scene projection; Scene generation; Spatial light modulator

Abstract

We compare modulation-transfer-fimction (MTF) measurements for both mid-wave (MWIR) and long-wave IR (LWIR) bands for an IR-laser scene projector based on the digital micro-mirror device (DMD). We evaluate MTF for both IR-CO2 (10.6 μm) and IR-HeNe (3.39 μm) laser systems. This gives a quantitative image-quality criterion for verifying system performance using identical configurations of the DMD, lens, and screen. Different angles of illumination for the MWIR and LWIR were used, to give an output beam always perpendicular to the DMD. For this experiment a set of bar-target images was used to measure the residual modulation depth at the fundamental spatial frequency of the bars. As expected, the MWIR projector system has better MTF than the LWIR system because of diffraction effects occurring at the 17-μm pixels of the DMD.

Publication Date

12-20-2004

Publication Title

Proceedings of SPIE - The International Society for Optical Engineering

Volume

5408

Number of Pages

199-202

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.1117/12.542749

Socpus ID

10044287220 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/10044287220

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