Optical Material Characterization for WFIRST WFI
Abstract
We present the optical characterization measurements of several materials that are being considered for use on the Wide Field Instrument (WFI) aboard the Wide Field Infrared Survey Telescope (WFIRST) satellite. In addition to a number of imaging filter modes in the optical and near-infrared spectral range, WFI will provide two modes of multi-object slitless spectroscopy: a prism for low-dispersion spectroscopy; and a grating + prism (grism) for higher-resolution spectroscopy. To inform the optical design of the prism element, we measured the index of refraction of a sample of STIH-1 glass material at temperatures between 100 K and 300 K using the Cryogenic High Accuracy Refractometry Measurement System (CHARMS). We also measured three bandpass filter samples (one for the grism, two for the prism) using a benchtop double-beam monochromator instrument.
- Publication:
-
American Astronomical Society Meeting Abstracts #235
- Pub Date:
- January 2020
- Bibcode:
- 2020AAS...23531108B