Share Email Print

Proceedings Paper

Interferometer with single-axis robot: design, alignment and performance
Author(s): Alexey Shakun; Aleksandr Santos-Skripko; Oleg Sazonov; Igor Maslov; Nikolay Ignatiev; Igor Stupin; Gabriele Arnold; Alexey Grigoriev; Oleg Korablev
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper Abstract

An interferometer is an essential subsystem of the Fourier-transform spectrometer (FTS). We describe an FTS instrument to operate at the surface of Mars based on a Michelson interferometer with hollow retroreflectors. The instrument will operate in two different regimes, observing the solar disc through the atmosphere to measure trace gases, and measuring the thermal emission from the atmosphere to study the planetary boundary layer (PBL). The interferometer has an aperture of 1 inch, operates in the spectral range 1.7-17 μm, and features low mass and volume (≤1 kg with all necessary subsystems). Beam splitter and compensator are made of potassium bromide (KBr). A single-axis robot with stepper motor drive provides a linear movement of the retroreflector (the speed stability is about 2%) and enables a maximal optical path difference (MOPD) of 15 cm. A reference channel with a distributed-feedback laser diode (0.76 μm) and a photodiode (Si) supports the interferogram sampling and the speed stabilization loop. The time to measure one interferogram with a best spectral resolution of about 0.05 cm–1 is 500 s (the sun tracking regime). In the thermal sounding regime, one measurement of a two-side interferogram (with the spectral resolution of ~1 cm–1) takes less than 1 min. Laboratory calibrations with a black body and a laser confirm the design parameters of the instrument.

Paper Details

Date Published: 9 September 2019
PDF: 6 pages
Proc. SPIE 11128, Infrared Remote Sensing and Instrumentation XXVII, 111280G (9 September 2019); doi: 10.1117/12.2535436
Show Author Affiliations
Alexey Shakun, Space Research Institute (Russian Federation)
Aleksandr Santos-Skripko, Space Research Institute (Russian Federation)
Oleg Sazonov, Space Research Institute (Russian Federation)
Igor Maslov, Space Research Institute (Russian Federation)
Nikolay Ignatiev, Space Research Institute (Russian Federation)
Igor Stupin, Space Research Institute (Russian Federation)
Gabriele Arnold, German Aerospace Ctr. DLR (Germany)
Alexey Grigoriev, Space Research Institute (Russian Federation)
Oleg Korablev, Space Research Institute (Russian Federation)

Published in SPIE Proceedings Vol. 11128:
Infrared Remote Sensing and Instrumentation XXVII
Marija Strojnik; Gabriele E. Arnold, Editor(s)

© SPIE. Terms of Use
Back to Top
Sign in to read the full article
Create a free SPIE account to get access to
premium articles and original research
Forgot your username?