A novel hyperspectral camera based on a birefringent ultrastable common-path interferometer

2020 ◽  
Author(s):  
Fabrizio Preda ◽  
Oumin Shan ◽  
Antonio Perri ◽  
Dario Polli ◽  
Giulio Cerullo ◽  
...  
Keyword(s):  
Common Path ◽  
Hyperspectral Camera

A Hyperspectral Camera Based on a Birefringent Ultrastable Common-Path Interferometer

2019 ◽  
Author(s):  
Antonio Perri ◽  
Cristian Manzoni ◽  
Barbara E. Nogueira de Faria ◽  
Danielle C. Teles Ferreira ◽  
Fabrizio Preda ◽  
...  
Keyword(s):  
Common Path ◽  
Hyperspectral Camera

A Hyperspectral Camera for Remote Sensing based on a Birefringent Ultrastable Common-Path Interferometer

2018 ◽  
Author(s):  
Antonio Perri ◽  
Barbara E. Nogueira de Faria ◽  
D. Cristina Teles Ferreira ◽  
Dario Polli ◽  
Daniela Comelli ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Common Path ◽  
Hyperspectral Camera

A hyperspectral camera for conservation science, based on a birefringent ultrastable common path interferometer

2019 ◽  
Author(s):  
Antonio Perri ◽  
Bárbara E. Nogueira de Faria ◽  
Danielle C. Teles Ferreira ◽  
Daniela Comelli ◽  
Gianluca Valentini ◽  
...  
Keyword(s):  
Conservation Science ◽  
Common Path ◽  
Hyperspectral Camera

Non-common Path Aberrations measurement using the NWIWM method

2017 ◽  
Author(s):  
Luis Fernando Rodríguez Ramos ◽  
Javier López Campos ◽  
Oscar Tubío Araújo ◽  
Carlos Colodro Conde ◽  
Miguel Núñez Cagigal ◽  
...  
Keyword(s):  
Common Path

scholarly journals Nano-imprinted subwavelength gratings as polarizing beamsplitters

2021 ◽  
Vol 17 (1) ◽  
Author(s):  
Julian Wüster ◽  
Yannick Bourgin ◽  
Patrick Feßer ◽  
Arne Behrens ◽  
Stefan Sinzinger
Keyword(s):  
Nanoimprint Lithography ◽  
Optical Measurement ◽  
Design Method ◽  
Optical Systems ◽  
Surface Metrology ◽  
Measurement Systems ◽  
Common Path ◽  
Dielectric Coatings ◽  
Subwavelength Gratings ◽  
Wide Range

AbstractPolarizing beamsplitters have numerous applications in optical systems, such as systems for freeform surface metrology. They are classically manufactured from birefringent materials or with stacks of dielectric coatings. We present a binary subwavelength-structured form-birefringent diffraction grating, which acts as a polarizing beamsplitter for a wide range of incidence angles −30∘…+30∘. We refine the general design method for such hybrid gratings. We furthermore demonstrate the manufacturing steps with Soft-UV-Nanoimprint-Lithography, as well as the experimental verification, that the structure reliably acts as a polarizing beamsplitter. The experimental results show a contrast in efficiency for TE- and TM-polarization of up to 1:18 in the first order, and 34:1 in the zeroth order. The grating potentially enables us to realize integrated compact optical measurement systems, such as common-path interferometers.

Simulation and analysis of the coherent-dispersion spectrometer for exoplanet detection

2021 ◽  
Vol 503 (2) ◽  
pp. 3032-3043
Author(s):  
Yinhua Wu ◽  
Shasha Chen ◽  
Pengchong Wang ◽  
Shun Zhou ◽  
Yutao Feng ◽  
...  
Keyword(s):  
Data Processing ◽  
Michelson Interferometer ◽  
Energy Utilization ◽  
Design Stage ◽  
Inversion Method ◽  
Fringe Visibility ◽  
Common Path ◽  
Data Processing Method ◽  
Detection Instrument ◽  
Performance Research

ABSTRACT The coherent-dispersion spectrometer (CODES) is a new exoplanet detection instrument using the radial velocity (RV) method. This attempts mainly to improve environmental sensitivity and energy utilization by using an asymmetric, common-path Sagnac interferometer instead of a traditional Michelson interferometer. In order to verify its feasibility and to choose the appropriate key parameters to obtain the optimal performance, research on data processing for the design stage of the CODES is performed by systematic simulation and analysis. First, the instrument modelling is carried out for further data analysis according to the principle of the CODES, and the reliability of the model is verified by experiments. Second, the influence of key parameters on fringe visibility is analysed systematically, which provides a certain reference for the choice of the key parameters. Third, the RV inversion method for the CODES is proposed and optimized according to the related analysis results so as to promote RV inversion precision. Finally, the recommended values for the key parameters of the CODES are given. The experimental results show that the data processing error of RV inversion is less than 0.6 m s–1 within the recommended range of key parameters. This indicates that the scheme of the CODES is reasonable and feasible, and that the proposed data processing method is effective and well matched with the instrument design.

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