Abstract
The influence of air pressure on the image quality, especially on the focal point position, is mostly neglected. This effect, however, may be of significance for lenses used in different environments. Apart from external focus compensations it is shown that the effect of a different air pressure may also be compensated internally. The mathematical approach is analogously to the chromatic aberrations and leads to a supplement of the well-known fundamental Calculated examples of so called 'apressurized lenses' are given.
© 1994 Optical Society of America
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