describedto have brilliant illumination and to use an eye-piece of high power. When from practice the eye has learnt to recognize the finer differencesin the quality of the contour images this method of investigation gives verv CH. 17/] TEST PLATE AND APERTOMETER trustworthy results. Differences in… … Fig. 145- The Abbe Pes/ Plate, lines covered by cover-glasses ranging inthickness from 0.09 to 0.24 mm. The quality of the image outside the axis is not dependent on sphericaland chromatic correction in the strict sense of the term. Indistinctness of thecontours toward the borders of the field of…
Microscopy
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