Camera, Cavity, Probe
Wednesday, August 30, 2006
A Cavity Camera has been designed and developed that generates a panoramic image of part of the wall of a cavity surrounding. Only the Probe tip is inserted into the cavity.
The Cavity Camera consists of an annular lens, a transfer lens, and a video camera. The annular lens is located at the Probe tip. The plane of the annular lens is perpendicular to the cylindrical axis of the Probe. The field of view of annular lens is a cylindrical circumferential shape, extending from 20 degrees to back of the plane of the lens to 25 degrees front of the plane of the lens. The depth of field extends from the lens surface to infinity. The lens projects the cavity wall image from the cylindrical field of view to an annulus on the image plane of the video camera.
A cylindrical light ring can be mounted to the Probe. Illumination from the light source reaches the cylindrical light ring through an Fiber Optic light pipe. The light source is a laser diode in combination with a rotating mirror. Light is projected from the cylindrical light ring onto the cavity wall.
The annular video image is digitized. Data processing includes mapping linearization between points in the cylindrical field of view and points in the annular image in order to minimize image distortion.
Source: Document MFS-26247, Marshall Flight Space Center Reference: : John A. Gilbert, University of Alabama, Huntsville, and Donald R. Matthys, Marquette University
Industrial Products
posted by JD52 @ 9:35 PM,
