cope is used for observation, the eye of the observer forms anintegral part of the optical combination (Figs. 16, 21). \ 2. A Simple Microscope.—With this an enlarged, erect image of an objectmay be seen. It always consists of one or more converging lenses or lens-systems(Figs. 16-20), and the… … Figs. 1-9, showing the Principal Optic Axis and the Optical Center of variousforms of Lenses. Axis. The Principal Optic Axis. c-c. Centers of curvature of the livo surfacesof the lens. c. I. Optical center of the lens, r-r. Radii of curvature of the twolens surfaces, t-t. Tangents in Fig. 4. \ 3.…
Microscopy
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