Abstract

Interest in the low-temperature ultraviolet absorption spectra of biological materials has led to the design and construction of a reflecting microscope objective in which the conventional, two-element system is modified by the addition of a reflecting correction plate. The system has high aperture, low central obstruction, long working distance, and zero chromatic aberration. The correction plate simplifies certain problems in construction and eliminates the need for figuring surfaces with deep curvatures.

© 1955 Optical Society of America

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