Imaging Mode

In the short camera imaging mode, the unobscured position in the disperser carousel is placed at the pupil, and the collimated beam passes straight through to the camera.

The short camera re-images a 27 x 27 arc-min field of view at a plate scale of 0.200 arc-sec/pixel. This camera produces images with an RMS diameter of $24.4 \pm 6.9$ microns (at 74.80 microns/arc-sec) averaged over all field angles and wavelengths within the 0.39-105 micron spectral range (without refocus). Table 3 show the RMS image diameters for four pass-bands and four field positions.

 

Table 3: Short camera image diameters (arc-sec) for 4 pass bands

Field	mod-U	B band	V band	R band	I band
on ax.	***	0.12	0.22	0.31	0.31
50%	***	0.16	0.21	0.21	0.17
80%	***	0.26	0.24	0.20	0.20
full f.	***	0.43	0.27	0.25	0.32