Patent ID: 7037005
Filing Date: 2006-05-02
Classification: G02B,G03B

Abstract:
1. An apparatus for providing pan and tilt capability to a stationary imaging device, the apparatus comprising: a first achromatic prism doublet positioned on a first axis including a first prism having a first surface lying in a plane substantially perpendicular to the first axis and a second surface inclined with respect to the first axis, and a second prism having a third surface lying in a plane substantially parallel to the second surface and a fourth surface inclined with respect to the first axis; a second achromatic prism doublet positioned on the first axis including a third prism having a fifth surface lying in a plane substantially perpendicular to the first axis and a sixth surface inclined with respect to the first axis, and a fourth prism having a seventh surface lying in a plane substantially parallel to the sixth surface and an eighth surface inclined with respect to the first axis; and at least one motor for rotating the first and second achromatic prism doublets about the first axis whereby polychromatic electromagnetic radiation from a portion of an area of interest is directed toward an imaging device.