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Imaging system performance based upon <inline-formula><math altimg="none" display="inline" overflow="scroll"><mrow><mi>F</mi><mi>λ</mi><mo>∕</mo><mi>d</mi></mrow></math></inline-formula>

2007; SPIE; Volume: 46; Issue: 10 Linguagem: Inglês

10.1117/1.2790066

1560-2303

Gerald C. Holst,

Optical Polarization and Ellipsometry

Imaging system performance can be described in the spatial domain, where the optical blur diameter is compared to the detector size, or in the frequency domain [modular transfer function (MTF) approach], where the optics cutoff is compared to the detector cutoff. Both comparisons provide a metric that is a function of F/d, where F is the focal ratio, is the wavelength, and d is the detector size. F/d is applied to three models: Schade's equivalent resolution (visible systems), Snyder's MTFA (MTF area; visible systems), and target acquisition (NVThermIP—an infrared system model). All models produced curves that exhibit a transition in the region 0.41<F/d 2, no aliasing occurs. This may be important for medical imaging, where sampling artifacts may be interpreted as a medical abnormality, or for space probes, where it is impossible to obtain ground truth.