Apparatus for use in luminescence applications
AssigneeSTMicroelectronics (Research & Development) Limited
InventorsFrancescopaolo Mattioli Della Rocca, John Kevin Moore
Life of this patent
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Abstract
Photoluminescence from a sample detector is detected using an array of photo-sensitive detectors. At least one first photo-sensitive detector of the array is provided with a first type of linear polarization filter and at least one second photo-sensitive detector is provided with a second type of linear polarization filter. The first type of linear polarization filter has a plane of polarization which is at angled with respect to a plane of polarization of said second type of polarization filter.
Claims19
A system, comprising:
- a light source configured to emit pulses of light directed towards a sample;
- a first photo-sensitive detector configured to receive photoluminescence from said sample in response to said pulses of light, said first photo-sensitive detector having a first type of linear polarization filter;
- a second photo-sensitive detector configured to receive photoluminescence from said sample in response to said pulses of light, said second photo-sensitive detector having a second type of linear polarization filter;
- wherein said first type of linear polarization filter has a plane of polarization which is angled with respect to a plane of polarization of said second type of polarization filter;
- wherein each of the first and second linear polarization filters is provided by a grid of parallel wires, wherein a longitudinal extent of said parallel wires defines the plane of polarization;
- and
- a signal processor configured to receive output from the first and second photo-sensitive detectors and further configured to trigger the light source to emit said pulses of light, the signal processor operable to separately measure an optical emission lifetime of a first polarization component of said photoluminescence detected by the first photo-sensitive detector and a second polarization component of said photoluminescence detected by the second photo-sensitive detector.
A system, comprising:
- a light source configured to emit pulses of light directed towards a sample;
- a sensor array including at least one first photo-sensitive detector having a first type of linear polarization filter and at least one second photo-sensitive detector having a second type of linear polarization filter, wherein said first type of linear polarization filter has a plane of polarization which is angled with respect to a plane of polarization of said second type of polarization filter;
- wherein each photo-sensitive detector in the sensor array having one of said first and second linear polarization filters is individually provided with a linear polarization filter;
- a signal processor configured to receive output from the at least one first photo-sensitive detector and the at least one second photo-sensitive detector and further configured to trigger the light source to emit said pulses of light, the signal processor operable to separately measure an optical emission lifetime of a first polarization component of said photoluminescence detected by the at least one first photo-sensitive detector and a second polarization component of said photoluminescence detected by the at least one second photo-sensitive detector, and
- a colored filter over one of the first and second photo-sensitive detectors, wherein there is no colored filter over the other of the first and second photo-sensitive detectors.
A system, comprising:
- a light source configured to emit pulses of light directed towards a sample which emits a photoluminescence in response to said pulses of light;
- a first splitter configured to receive the emitted photoluminescence and produce a first photoluminescence signal in a first path and a second photoluminescence signal in a second path;
- wherein the first path is distinct from the second path;
- a first type of linear polarization filter configured to receive the first photoluminescence signal and output a polarized first photoluminescence signal;
- a second type of linear polarization filter configured to receive the second photoluminescence signal and output a polarized second photoluminescence signal;
- a first photo-sensitive detector configured to receive the polarized first photoluminescence signal;
- a second photo-sensitive detector configured to receive the polarized second photoluminescence signal;
- and
- a signal processor configured to receive output from the first and second photo-sensitive detectors and further configured to trigger the light source to emit said pulses of light, the signal processor operable to separately measure an optical emission lifetime of a first polarization component of said photoluminescence from the polarized first photoluminescence signal detected by the first photo-sensitive detector and a second polarization component of said photoluminescence from the polarized second photoluminescence signal detected by the second photo-sensitive detector.
Dependencies are inferred from the claim text.