Filter Wheel Cameras for the NGST

摘要

A near and a mid infrared imaging camera for the NGST are presented. which were studied under ESA contract. Imaging in the 1 to 5 microns domain, possibly extended to 0.6 microns is a strong requirement for the core programs identified for NGST. Our compact near-IR camera design emphasizes simplicity with a single optical train covering a field 6 x 3 arcmin~2 with a fixed spatial sampling of 0.03 arcsec / pixel on a 12k x 6k detector array. Three filter wheels allwo for broad band and narrow band imaging. A mid-IR cambera on NGST will be capable of carryign out aspects of many programs in the DRM. In addition the mid-IR is relatively unexplored at the spatial resolution and sensitivity NGST will be capable of, and so there is great potential for serendipitous science. A compact mid-IR camera design is presented covering a field 2.5 x 2.5 arcmin~2 in the spectral range from 5 - 28 mu m with two optical channels and a critical spatial sampling of 0.075 arcsec at 5 mu m and 0.15 arcsec at 10 mu m wavelengths.