Modern microscopy; a handbook for beginners and students (1912)
Cross, M. I, Cole, Martin J · Chicago, Chicago Medical Book Co. · leaf 117
advanceof other makers in the production of such condensers. Theydesigned two of apochromatic form, one having a N.A. of 1*0 foruse dry and the other an oil immersion having a N.A. of 140.Some of the condensers before referred to possess aplanaticapertures slightly in excess of those by Powell and… … Fig. 35.—Iris Diaphragm as fitted to the Coxdexser Carrier. denser is not to be reckoned by its total numerical aperture, butby the solid cone that it will transmit, or, in other words, byits perfection of correction ; for its aplanatic cone alone can beemployed for critical illumination. If,…
Microscopy
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