A double reflecting plate calorimeter Rev. Sci. Instrum.41, 1479 (1970) was used to evaluate the energy components of a pulsed 1.060 mgr; neodymium laser light beam entering the calorimeter polarized parallel (EH) and perpendicular (EV) to a horizontal plane. The relationship between these components varied fromEHequals; 0.94EVtoEHequals; 1.25EV. Estimated error ofEHandEVis 2.3percnt;. As a check on the accuracy of polarization component measurements at 1.060 mgr;, an intercomparison of data was made between this calorimeter and an NBS liquid cell calorimeter. The agreement was about 0.2percnt;.
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