Hemispherical-field-of-view, nonimaging narrow-band spectral filter.
Two compound parabolic concentrators are used to create a 180 degrees -field-of-view spectral filter. The collection optics are reflective and are designed to collimate the light through a multilayer interference filter and then to refocus it onto an optical detector. Assuming unit reflectance and no loss through the optical filter, this device operates at the thermodynamic collection limit.
Miles
R B
RB
Webb
S G
SG
Griffith
E L
EL