Patents Examined by Mark Robison
  • Patent number: 5726814
    Abstract: A three field of view change apparatus has a cubic carousel 1 mounted for rotation about a rotation axis 2 which is coincident with a diagonal of the carousel 1. The rotation axis 2 makes an angle of 54.736.degree. with a fixed optical axis 5 so that carousel 1 can be rotated to cause the fixed optical axis 5 to pass through the centres of any two opposed faces of the carousel 1. Optical components 14 are arranged on opposed faces of the carousel 1 and can be swung into alignment with the optical axis by rotating the carousel.
    Type: Grant
    Filed: November 22, 1995
    Date of Patent: March 10, 1998
    Assignee: Barr & Stroud Limited
    Inventor: Michael Owen Lidwell