Accession Number : ADD015350

Title :   Shutter Apparatus.

Descriptive Note : Patent, Filed 4 Mar 91, patented 5 May 92,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Dibble, John G

Report Date : 05 May 1992

Pagination or Media Count : 7

Abstract : An apparatus for protecting the image recording media in a tracking camera from destructive illumination. The apparatus includes a shutter assembly mounted between the lens and the camera and a sensor assembly mounted in juxtaposition with the camera so that a sensor at one end of the tube in the sensor assembly detects destructive illumination before it impinges on the lens. The sensor causes a signal to be passed through circuitry connecting to the shutter assembly, activating a rotary solenoid which moves a blade to an interrupting position between the lens and the camera until no further destructive illumination impinges on the sensor. The shutter blade return to a non-interrupting position when the sensor no longer receives destructive illumination.

Descriptors :   *ILLUMINATION, *TRACKING CAMERAS, ASSEMBLY, BLADES, CAMERAS, IMAGES, MEDIA, SIGNALS, SOLENOIDS, TUBES, PROTECTION

Subject Categories : Photography

Distribution Statement : APPROVED FOR PUBLIC RELEASE