Any Huygenian ocular (Fig 30) may, however, be used as a micrometer ocularby placing the ocular micrometer at the level of the ocular diaphragm, where thereal image is formed. If there is a slit in the side of the ocular, and the ocularmicrometer is mounted in some way it may be introduced through… … Figs. 98, 99. Filar Ocular Micrometer with Field (Bausch & Lomb, OpticalCo.). For other ocular micrometers see pp. 23, 26. \ 163. Obtaining the Valuation of the Filar Micrometer. This micrometer(Fig. 98-99) consists of a Ramsdens ocular and cross lines. As seen in Fig. 98there are three lines.…
Microscopy
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