Any Huygenian ocular (Fig. 117) may, however, be used as a micrometerocular by placing the ocular micrometer at the level of the ocular diaphragm,where the real image is formed. If there is a slit in the side of the ocular,and the ocular micrometer is mounted in some way it may be introducedthrough… … Fig. 117. Sectional view of a Huygenian ocular. Axis. Optic axis of the ocular. D. Diaphragm ofthe ocular. E. L. Eye-Lens. F. L. Field-Lens. E. P. Eye-point. In micrometry the ocular microm-eter with a Huygenian ocular must be placed at the levelof the diaphragm zvhere the real image is formed. In…
Microscopy
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