This acquisition unit is used for all instruments at the f/15 focus except the CCD camera, which has a dedicated A&G box, and the Multi-Purpose Fotometer, which mounts directly on to the telescope. The instruments concerned are the Peoples' Photometer, the Richardson-Brealey Spectrograph, and `own' instruments. Figure is a schematic diagram of this acquisition unit.
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Figure: The acquisition unit used with the photometers and spectrographs at the f/15 Cassegrain focus of the JKT, showing the acquisition mirror, TV camera and comparison system.
The following facilities are provided:
This unit has remotely operated flat mirrors which can either direct the image from the field direct to the TV, direct the light off the slit jaws of a spectrograph, or be removed entirely