The present invention is directed to an improved CT detector scintillator to
photodiode optical coupling. The CT detector utilizes a controlled air gap between
the photodiode array and the scintillator array together with an anti-reflective
layer on the scintillator array. To improve the absorption of light at the photodiode
array, the photodiode array includes a textured light reception surface. By incorporating
a textured layer with the photodiode array, the light collection efficiency of
the photodiodes is improved. The textured layer may extend along an x- and/or z-axis
and the texturing may be in different forms. For example, the textured layer may
include a series of pyramidally-shaped protrusions.
