| 摘要 |
<p>Apparatus for bandpass photon detection (300, 400) containing a lens (302, 402) for collimating input light, a bandpass filter element (304, 404), and an optical signal detector (306, 406). Light passes from a source into the lens which collimates the light which then is incident upon the filter. The filter is tuned to a particular band of wavelengths, such that out of all of the wavelengths that are incident upon the front side of the filter, a wavelength band is propagated through the filter and passes from the filter to the photomultiplier detector, such that the output of the photomultiplier detector is a voltage level representing the energy content within that wavelength band. In various alternative embodiments, the bandpass photon detectors are arranged in a number of cascade arrangements such that multiple wavelength bands are simultaneously detected. <IMAGE> <IMAGE></p> |
