Optical Slits Research Articles

The American Optical Slit Lamp

The American Optical Slit Lamp

Automatic Electrometer Scaler

An automatic arrangement is described for operating an electrometer. Double parallel optical slits replace the ordinary eyepiece-reticule scale, or the scale of a mirror-scale arrangement. Photoelectric signals are produced when the real image of the electrometer needle or the light beam crosses the optical slits. These signals operate the electrometer itself and a time-interval printer. Both current and sensitivity measurements are left on a printed record. Continuous or intermittent-continuous operation make the apparatus completely automatic.

A Compact Optical Slit of Economical Design

First Page