X-ray diffraction data of aqueously and thermally altered carbonaceous chondrites
University of Oxford (2021)
Abstract:
Position sensitive detector X-ray diffraction (PSD-XRD) data created as part of a study into the effects of aqueous and thermal alteration on the spectral signature in the NIR and MIR wavelength ranges. Data were collected on an Enraf-Nonius PDS120 X-ray diffractometer with an INEL curved 120o PSD. Each meteorite had two diffraction patterns collected on two 50mg aliquots (HB1 and HB2) of a larger 1.8g mass powdered sample.
Afocal catadioptric optical assembly for Fourier-sampling computational microscopy
Applied Optics Vol. 60, Issue 7, pp. 2003-2013 (2021)
Abstract:
This paper describes a fast, wide-angle, afocal, catadioptric optical assembly designed and used for the projection of coherent collimated beams in Fourier-sampling computational microscopy, which demands an unorthodox set of optical requirements unmet by traditional imaging designs. The system accepts a diverging set of collimated beams as an input and produces a converging set of collimated beams that overlap on the surface of a target at 5 m scale distances. We derive equations for the focal surfaces relevant for system alignment and report the results of simulations of the optical performance of the system for axially symmetric and asymmetric beam interferometry. We also describe a method to vary the microscope imaging distance by up to one meter through small positional shifts in the optical elements
HARMONI - first light spectroscopy for the ELT: broadband reflective coatings
Proceedings of SPIE--the International Society for Optical Engineering SPIE, the international society for optics and photonics 11451 (2020) 114515v-114515v-9
HARMONI Science Path Optics: predicting and analysing the expected as-built performance with and end-to-end optical model
SPIE, the international society for optics and photonics (2020) 370
HARMONI - first light spectroscopy for the ELT: final design of the integral field unit
Proceedings of SPIE--the International Society for Optical Engineering SPIE, the international society for optics and photonics 11451 (2020) 1145138-1145138-11