Accession Number : AD0722335

Title :   Investigation of the Imaging Characteristics of a Kinoptic 9.8-mm Lens.

Descriptive Note : Final rept.,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s) : Daspit,Frank A.

Report Date : 25 MAR 1971

Pagination or Media Count : 13

Abstract : In the process of evaluating the overall performance of the wide-angle camera system used aboard the USNS Mizar (TAGOR-11) for underwater search, it was decided to investigate the imaging characteristics of the Kinoptic 9.8-mm lens used with the camera in order to isolate its limitations from those of the other components of the system. In use the lens is mounted behind a watertight, hemispherical glass dome. The water/glass, glass/air interfaces formed by the dome act as a negative lens, forming a virtual curved image of the (relatively) flat ocean bottom. This image in turn serves as the object for the camera lens. Tests were made of the len's ability to image both flat and curved objects in air, extending across its field of view. The tests show that the resolving power of the lens falls off greatly at the edge of the field of view for curved objects, so much so that only the general form of the resolution target can be distinguished. For both flat and curved objects, radial resolution is nearly twice as good as tangential resolution. (Author)

Descriptors :   (*CAMERA LENSES, OPTICAL PROPERTIES), (*UNDERWATER CAMERAS, CAMERA LENSES), TEST METHODS, DISTORTION, RESOLUTION

Subject Categories : Photography
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE