View of a Photometer

Photometer (Museum piece: This instrument appears to be useful in measuring angular deviation between spectroscopic lines, similar to a spectrometer.  An eyepiece and a set of prisms mounted in the upper flat portion, which, in turn, is mounted on a degree-graduated base plate allow one to measure the angular deviation by swinging another lens above the base plate until the light is focused into the eyepiece., Credit Line: U.S. Military Academy, courtesy of AIP Emilio Segrè Visual Archives
Abstract/Description: Photometer (Museum piece: This instrument appears to be useful in measuring angular deviation between spectroscopic lines, similar to a spectrometer. An eyepiece and a set of prisms mounted in the upper flat portion, which, in turn, is mounted on a degree-graduated base plate allow one to measure the angular deviation by swinging another lens above the base plate until the light is focused into the eyepiece.
Subject(s): Equipment and supplies
Instruments
West Point (N.Y.)
United States Military Academy
Credit Line: U.S. Military Academy, courtesy of AIP Emilio Segrè Visual Archives
Catalog ID: US Military Academy F12