axis c.U- axis … 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 tzvo surfacesof the lens. c. 1. 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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