# Introduction to Imaging Spectrometers (Tutorial Texts in by William L. Wolfe

By William L. Wolfe

Delivering an creation to imaging spectrometers, this article first studies the necessary heritage details in optics, radiometry, imaging, spectral sensing and focal airplane arrays, then is going directly to talk about the foundations of those topics and follow them to precise difficulties.

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Extra info for Introduction to Imaging Spectrometers (Tutorial Texts in Optical Engineering)

Sample text

0 µm per cm. 2 cm at the longest. This can be operated near a focal plane, and this is the manufacturer's recommendation. However, because of possible reflection effects, the CVF should not be operated next to the focal plane, where the PPA is situated. ), Other versions of CVFs are available in configurations like semicircles (that can be bonded to form full circles) in the visible and the infrared. They typically have resolving powers of about 50 and ranges of an octave, and 4-inch diameters.

TT24, 1996; W. L. Wolfe and G. J. , The Infrared Handbook, ERIM, 1989. 1) where A d is the detector area, B is the effective noise bandwidth, P is the power on the detector, and SNR is the signal-to-noise ratio. 3) where N is the photon number, the rate times the integration time, and N,, is the rms number of internal noise electrons. Care must be exercised with the internal noise term, because sometimes the mean square, ms, value is cited, but other times the root mean square, rms, value is given.

1 Spectral Variables There exist many ways to represent the spectral variable of a radiometric quantity. Perhaps the most familiar is the wavelength. It is the distance between two points of equal phase on a sinusoidal wave. It is usually given the symbol 1, and is measured in micrometers, µm, nanometers, nm, and angstroms, A. The wave number may be the next most frequently used spectral variable. It is designated by either a or v; I will use a. Therefore the relationship between wavelength (?.