| 摘要 |
A prime focus unit that enables position and angle correction within a lens barrel while being located at the prime focus of a telescope. There is provided a first frame on which a barrel top inner tube of a telescope is to be mounted. A second frame is joined to the first frame by way of a Stewart platform comprising six jacks and three pressurized springs. An observation apparatus for collecting observation data and an optical correction system for effecting optical correction are provided on the second frame. If a change arises in the relative position and angle formed between the telescope and the observation apparatus in association with a change in the attitude of the telescope, the change can be eliminated by adjustment of a Stewart platform.
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