Development of a Multi-Lens Quasi-Optical Imaging Spectrometer for Ground-Based Astronomy
S.O. Dabironezare (TU Delft - Tera-Hertz Sensing, Space Research Organisation Netherlands)
L.G.G. Olde Scholtenhuis (TU Delft - Tera-Hertz Sensing)
L.H. Marting (TU Delft - Tera-Hertz Sensing)
Y.N. Shiino (TU Delft - Tera-Hertz Sensing, University of Tokyo)
A. Moerman (TU Delft - Tera-Hertz Sensing)
W.F. Gregoor (TU Delft - EMSD EEMCS Project engineers M)
C. Meijneke (TU Delft - EMSD policy / communications/ scientific development)
J.J.A. Baselmans (TU Delft - Tera-Hertz Sensing)
A. Endo (TU Delft - Tera-Hertz Sensing)
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Abstract
Achieving a wide instantaneous bandwidth and wide scanning capabilities are essential for development of (sub)millimeter imaging spectrometers for astronomical observations. Such an instrument can be realized using complex quasi-optical (QO) systems. In this work, we propose a QO architecture based on refractive components to reduce the overall size and volume of the instrument. This compact design is optimized using a sequential Geometrical Optics based technique. The performance of the preliminary design is reported in terms of the aperture efficiency over an octave of bandwidth and the field of view of the telescope hosting the instrument exhibiting less than 1dB of scan loss. The finalized design of the instrument, its performance, and realization approach will be discussed at the conference.
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