Characterization of Fabry-Perot interferometers and multi-etalon transmission profiles - The IBIS instrumental profile

  title={Characterization of Fabry-Perot interferometers and multi-etalon transmission profiles - The IBIS instrumental profile},
  author={Kevin P. Reardon and Fabio Cavallini},
  journal={Astronomy and Astrophysics},
Aims. Properly characterizing Fabry-Perot interferometers (FPI) is essential for determining their effective properties and evaluating the performance of the astronomical instruments in which they are employed. Furthermore, in two-dimensional spectrographs where multiple FPI are used in series, the actual distribution of plate separation errors will be crucial for determining the resulting transmission profiles. We describe techniques that address these issues utilizing the FPI of IBIS, a solar… 

New technique to measure the cavity defects of Fabry–Perot interferometers

Context. Several astronomical instruments, for both nighttime and solar use, rely on tunable Fabry–Perot interferometers (FPIs). Knowing the exact shape of the etalons’ cavity is crucial for

Measuring the etalon quality of the GREGOR Fabry–Pérot interferometer

  • M. VermaC. Denker
  • Physics
    Journal of Astronomical Telescopes, Instruments, and Systems
  • 2020
Abstract. Imaging spectropolarimetry is an important observational tool in solar physics because it provides fast-cadence spectral scans with high spectral resolution, large field-of-view, and

Imaging performance of multi-etalon bidimensional spectrometers

Aims. In recent years, several new solar and nighttime panoramic spectrometers based on Fabry-Perot interferometers have been successfully developed. In this paper we evaluate the imaging performance

On Fabry–Pérot Etalon-based Instruments. IV. Analytical Formulation of Telecentric Etalons

Fabry–Pérot etalons illuminated with collimated beams have been analytically characterized in detail since their invention. Meanwhile, most of the features of etalons located in telecentric planes

A Prototype of a Large Tunable Fabry–Pérot Interferometer for Solar Spectroscopy

Large Fabry–Pérot Interferometers (FPIs) are used in a variety of astronomical instrumentation, including spectro-polarimeters for 4 m class solar telescopes. In this work we comprehensively

The GREGOR Fabry‐Pérot Interferometer

The GREGOR Fabry-Perot Interferometer (GFPI) is one of three first-light instruments of the German 1.5-meter GREGOR solar telescope at the Observatorio del Teide, Tenerife, Spain. The GFPI uses two

On Fabry–Pérot Etalon-based Instruments. III. Instrument Applications

The spectral, imaging, and polarimetric behavior of Fabry–Pérot etalons have an influence on imaging vector magnetograph instruments based on these devices. The impact depends on the optical

Wide field of view spectroscopy using solid Fabry-Perot interferometers

We present a high resolution spectrometer consisting of dual solid Fabry-Perot Interferometers (FPI). Each FPI is made of a single piece of L-BBH2 glass which has a high index of refraction n~2.07.

Spectral characterization of Fabry-Perot etalon operating in Short Wave Infra-Red (SWIR) region

A promising technique for precise spectral characterization of solid Etalon operating in SWIR wavelength is demonstrated using tunable laser with a minimum wavelength scan step interval of 1

Frequency stability of the mode spectrum of broad bandwidth Fabry-Pérot interferometers

When illuminated by a white light source, the discrete resonances of a Fabry-Perot interferometer (FP) provide a broad bandwidth, comb-like spectrum useful for frequency calibration. We report on the



The new Göttingen Fabry-Pérot spectrometer for two-dimensional observations of the Sun

Studies of small-scale dynamics and magnetic fields in the solar atmosphere require spectroscopy and polarimetry with high spatial resolution. For this purpose, spectrometers based on Fabry-Perot

Measuring and Maintaining the Plate Parallelism of Fabry‐Pérot Etalons

Many dynamic phenomena on the Sun require observations with high temporal, spatial, and spectral resolution. Fabry‐Pérot–based imaging spectropolarimetry can serve these needs, especially in

Comments on the optimization of high resolution Fabry-Pérot filtergraphs

In this paper we present results of simulations of Fabry-Perot (FPI) system performance that address two entirely separate aspects. The first concerns the image quality of FPIs used in telecentric

Alignment of Fabry-Pérot Interferometer Plates in a Solar Vector Magnetograph

I describe a method for quickly and accurately determining the plate parallelism in a tunable Fabry-Pérot interferometer. The method takes advantage of the fact that our Fabry-Pérot is installed in a

IBIS: A New Post-Focus Instrument for Solar Imaging Spectroscopy

A new instrument for solar bi-dimensional spectroscopy, the Interferometric BIdimensional Spectrometer (IBIS), has been successfully installed at the Dunn Solar Telescope of the National Solar

The PEPSIOS Purely Interferometric High-Resolution Scanning Spectrometer. I. The Pilot Model

A description is given of the design principles, structure, and use of the PEPSIOS (trade mark) spectrometer, a versatile, easily portable, purely interferometric, high resolution short-range

Instrument function of the Fabry-Perot spectrometer.

An outline and review of the theory of the parallel-plate Fabry-Perot spectrometer is presented, including the effects of etalon surface irregularities and the finite solid angle of radiation admitted through the etalon.

Aberrations of fabry-perot interferometers when used as filters.

The spectral and optical performances of Fabry-Perot interferometers having nonuniformities in spacing are discussed, and it is shown that the non uniformities impair the spectral performance more than the optical, particularly with incident white light.

Exact evaluation of the transmitted amplitude for a Fabry-Perot interferometer with surface defects.

An exact easy-to-compute formula has been derived for the transmitted amplitude of a Fabry-Perot interferometer for various surface irregularities and the random distribution is found to affect the line shape in a more severe way.

On the effect of narrow-band filters on the diffraction limited resolution of astronomical telescopes

Sometimes Fabry-Perot and other narrow-band filters are used for astronomical imaging in the so-called telecentric mode. In it the pupil is collimated through the filter, resulting in different