Theoretical aspects of Fourier Transform Spectrometry and common path triangular interferometers.
Recent investigations have induced relevant advancements of imaging interferometry, which is becoming a viable option for Earth remote sensing. Various research programs have chosen the Sagnac configuration for new imaging interferometers. Due to the growing diffusion of this technique, we have developed a self-contained theory for describing the signal produced by triangular FTSs and its optimal processing. We investigate the relevant disadvantages of multiplexing, and compare dispersive with FTS instruments. The paper addresses some methods for correcting the phase error, and the non-unitary transformation performed by a Sagnac interferometer. The effect of noise on spectral estimations is discussed.
Barducci
Alessandro
A
Consiglio Nazionale delle Ricerche-Istituto di Fisica Applicata Nello Carrara, Area di Ricerca di Firenze del CNR, Via Madonna del Piano, 10, 50019, Sesto Fiorentino, Italy. a.barducci@alice.it
Guzzi
Donatella
D
Lastri
Cinzia
C
Marcoionni
Paolo
P
Nardino
Vanni
V
Pippi
Ivan
I
D004867:Equipment Design; D019544:Equipment Failure Analysis; D007368:Interferometry / Q000295:instrumentation*; D017550:Spectroscopy, Fourier Transform Infrared / Q000295:instrumentation*