Lurie-Houghton Telescope Corrector Cell

PHOTO: Corrector Cell
Here is the almost completed cell that will hold the corrector lens. It has all of its parts: the frame (or main part of the cell), the spacer (that provides enough depth in the cell to contain the lenses), the clamp ring that holds the two lenses in the frame, and the mounting ring that holds the entire corrector cell assembly in the telescope tube. The mounting ring is used to provide easy insertion and removal of the corrector assembly from the tube by allowing the outside diameter of the cell to be smaller than the tube. The cell attaches to the mounting ring with three screws that can be used to collimate the corrector assembly. A 3D rendering of the corrector assembly without the mounting ring can be seen in my design article on the telescope. Cullen Bennett of Arizona machined this for me in his home based machine shop. This photo was taken 25 March 2000 with an Olympus D-600L digital camera.