Abstract

Wide use of underwater optics started in 1950th, since then many underwater lenses were constructed. Now the whole world is interested mostly in deep-water research, which has started about 10 years ago. Now the most of underwater lenses are specially designed. It is very important to understand a role of every optical element in underwater optical system. This helps a designer to find best solution for starting point of such a system with further automatic aberration correction. We propose to use lenses with removed forward entrance pupil for deep-water lens design. Examples of different optical schemes and explanation of their design process are presented.

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