Advanced modelling of a moderate-resolution holographic spectrograph
arXiv:1705.01175 · doi:10.1364/AO.56.004284
Abstract
In the present article we consider an accurate modeling of spectrograph with cascade of volume-phase holographic gratings. The proposed optical scheme allows to detect spectra in an extended wavelength range without gaps providing relatively high spectral resolution and high throughput. However, modeling and minimization of possible cross-talks between gratings and stray light in such a scheme represents a separate task. We use analytical equations of coupled wave theory together with rigorous coupled wave analysis to optimize the gratings parameters and further apply the latter together with non-sequential raytracing algorithm to model propagation of beams through the spectrograph. The results show relatively high throughput up to 53% and absence of any significant cross-talks or ghost images even for ordinary holograms recorded on dichromated gelatin.
arXiv comment9 pages, 8 figures. Accepted for publication in Applied Optics, v. 56, N21, 2017
References in corpus (9)
- PEPSI: The high-resolution echelle spectrograph and polarimeter for the Large Binocular Telescope
- Supercritical Accretion Discs in Ultraluminous X-ray Sources and SS 433
- On the association of the ultraluminous X-ray sources in the Antennae galaxies with young stellar clusters
- Prime Focus Spectrograph for the Subaru telescope: massively multiplexed optical and near-infrared fiber spectrograph
- The pecular magnetic field morphology of the white dwarf WD 1953-011: evidence for a large-scale magnetic flux tube?
- New Luminous Blue Variables in the Andromeda galaxy
- Discovery of an extremely weak magnetic field in the white dwarf LTT 16093 = WD2047+372
- Moderate-Resolution Holographic Spectrograph
- Design and modeling of a moderate-resolution astronomic spectrograph with volume-phase holographic gratings