Extended dynamic range light detection systems and methods

Details Extended dynamic range light detection systems and methods Extended dynamic range light detection systems and methods

2011-05-31

2011-05-31

Legasse, Jr., Francis M (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

C250S208200, C250S2140RC, C356S318000

Reexamination Certificate

active

07952056

ABSTRACT:
Systems and methods for detecting and measuring light emitted from a sample and having a large dynamic range, e.g., a range of luminous intensity covering six or more orders of magnitude, that may be difficult to fully detect using a single detector with a limited detection range. Simultaneous measurements of the emitted light in two intensity ranges are performed using two detectors, e.g., one including a photomultiplier tube (PMT) and the other including a solid state detector such as a photodiode. A beam splitting element directs light emitted from a sample under investigation to both detectors simultaneously such that a portion of the light impinges on the first detector and a second portion of the light impinges on the second detector. A processor receives output signals from the two detectors and provides an output representing the luminous intensity of the sample over a detection range greater than the detection range of each individual detector, thereby providing a detection system having an enhanced dynamic range.

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