Investigation of the Imaging Characteristics of a Kinoptic 9.8-mm Lens.
NAVAL RESEARCH LAB WASHINGTON D C
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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 waterglass, glassair 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 lens 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