ABSTRACT
The term "isoperibol" refers to a calorimeter in a constant temperature environment. In 1970, West and Kenneth Churney wrote and published Theory of Isoperibol Calorimetry for Laser Power and Energy Measurements in which they developed the underlying concepts for isoperibol laser calorimetry. Thereafter, until his retirement in 1974, West designed and built various models of laser calorimeters that implemented the principles. He also published numerous other papers in which he discussed various aspects of laser power and energy measurements. The first significant calorimeter that West produced based on these principles was the C-series calorimeter, which was designed to measure the output of low to medium power lasers. The National Institute of Standards and Technology (NIST) calorimeter cavities contain specially selected glass which can absorb the radiation without suffering damage or degradation while keeping fluorescence to a minimum.
