Patent ID: 8119996
Filing Date: 2012-02-21
Classification: G01J,G01N

Abstract:
1. A quantum efficiency measurement apparatus comprising: a hemispheric portion with an inner surface having a light diffuse reflection layer; a plane mirror disposed to pass through a substantial center of curvature of said hemispheric portion and close an opening of said hemispheric portion, said plane minor including a first window provided at a position of the substantial center of curvature of said hemispheric portion for attaching an object to be measured to the first window, and a second window provided at a position apart by a predetermined distance from said first window; a spectrometer for measuring a spectrum in said hemispheric portion through said second window; a light source for applying an excitation light, through a third window provided in said hemispheric portion, at a predetermined angle with respect to a normal to said plane mirror toward said first window; and a processor for calculating a quantum efficiency of said object to be measured, based on a first spectrum measured by said spectrometer in a case where said object to be measured is disposed at said first window, and a second spectrum measured by said spectrometer in a case where a standard object having a known reflectance characteristic is disposed at said first window instead of said object to be measured.