Measurement method of the modulation transfer function of focal plane arrays

Bing Chen; Yunsheng Qian; Benkang Chang; Yi Cai

doi:10.1117/12.441425

25 September 2001 Measurement method of the modulation transfer function of focal plane arrays

Bing Chen, Yunsheng Qian, Benkang Chang, Yi Cai

Proceedings Volume 4548, Multispectral and Hyperspectral Image Acquisition and Processing; (2001) https://doi.org/10.1117/12.441425
Event: Multispectral Image Processing and Pattern Recognition, 2001, Wuhan, China

Abstract

Focal plane arrays (FPA) of HgCdTe detectors with responses in the 3-5micrometers or 8-14micrometers bands have been successfully incorporated into infrared imagers. Using a variety of digital signal processing techniques, good imagery has been obtained but the image quality is limited by sampling effects at the focal plane that cause non-isoplanantism and aliasing. The verification of the operation of these detectors is an important step in the design and development process. Modulation transfer function (MTF) is a measurement of how well the system will faithfully reproduce the scene. As the MTF decreases, scene detail associated with those specific spatial frequencies will be reproduced with lower contrast. The development of focal plane arrays with considerable on-chip processing, notably time-delay integration, imposes new and severe requirements on the instrumentation to establish the MTF of the integrated focal plane arrays.1 This paper details a method for measuring the MTF for such arrays. Several methods to derive the MTF from the experimental data were investigated; the preferred approach is presented.

Citation Download Citation

Bing Chen, Yunsheng Qian, Benkang Chang, and Yi Cai "Measurement method of the modulation transfer function of focal plane arrays", Proc. SPIE 4548, Multispectral and Hyperspectral Image Acquisition and Processing, (25 September 2001); https://doi.org/10.1117/12.441425

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