Huvitz CLM-4000, Руководство по обслуживанию

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Auto Lensmeter CLM-4000
9
1.6.
Measurement
Principle
Basic Principle
When there is no lens (0D state), parallel light that has transmitted the
collimator lens passes the pinhole and makes image on CCD. In case of
convex lens (lens with plus diopter), parallel light that has transmitted
the collimator lens converges through the measuring lens, passes the
pinhole and then makes image on CCD. On the other hand, in case of
concave lens (lens with minus diopter), parallel light that has transmitted
the collimator lens diverges through the measuring lens and then passes
the pinholes and at last makes image on CCD.
Initial State
Concave Lens
Convex Lens