The microscope; an introduction to microscopic methods and to histology (1901)
Gage, Simon Henry, 1851-1944 · Ithaca, N.Y. Comstock publishing company · leaf 58
It has a total numerical aperture of 1.00, and an aplanatic aper-ture of 0.65. CH. II] LIGHTING AND FOCUSING 43 Fig. 41. Zeiss1 Achromatic Conden-ser, c. s. c. s. Centering screws forchanging the position of the condenserand making its axis continuous withthat of the microscope. A segment ofthe… … § Si. Centering the Condenser.—To get the best possibleillumination for bringing out in the clearest manner the minute detailsof a microscopic object two conditions are necessary, viz.: The princi-pal optic axis of the condenser must be continuous with that of themicroscope (see frontispiece) and…
Microscopy
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