Affiliation:
1. National Research Council, Institute for Photonics and Nanotechnologies, Via Trasea 7, I-35131 Padova, Italy
Abstract
Abstract
Static Fourier transform spectrometers are devices that can be realized as monolithic and compact assemblies. In the basic version, they are usually realized gluing together a beam-splitter with two reflective diffraction gratings using spacers as connecting elements. In this work we present the development and test of an alternative form of this kind of instrument in which the dispersive elements are Littrow’s prisms and are glued to the splitting element, forming in this way a robust and filled structure with no air gaps. The device can work in the visible/near infrared spectral region with a resolution power that varies across the spectral range due to the dispersion of the used glasses. The absence of hollow regions inside the monolithic block makes the device extremely robust and protects the optical surfaces inside the interferometer from possible contaminations. The device is particularly suited for miniaturization, being spacers and structural frames not necessary. The tested instrument works in the 470 nm - 850 nm wavelength range with a variable resolution between 3000 and 300.
Publisher
Research Square Platform LLC