Patent ID: 6275298
Filing Date: 2001-08-14
Classification: G01B

Abstract:
A method for measuring a physical distance in a camera between a first reference surface on the camera and a second reference surface on the camera, the first reference surface being substantially parallel to the second reference surface, the method comprising the steps of:determining a distance LP from the first reference surface to an optically transparent material disposed intermediate the first and second reference surface;removably mounting an optical probe assembly to the camera, the optical probe assembly comprising a housing removably lockable to the camera in a predetermined orientation relative to the first reference surface;mounting an optically flat plate at the second reference surface;utilizing non-coherent light interferometry to determine a distance PF between the optically transparent material and the second reference surface; anddetermining a distance LF between the first reference surface and the second reference surface using the distances of LP and PF.