ROLLING SHUTTER BASED SENSING AND RELATED METHODS
Embodiments described herein generally relate to: sensing and/or authentication using luminescence imaging; diagnostic assays, systems, and related methods; temporal thermal sensing and related methods; and/or to emissive species, such as those excitable by white light, and related systems and methods.
1 . An imaging device, comprising:
a source of electromagnetic radiation configured to emit radiation to excite non-steady-state emission in emissive species during emission time periods of the emissive species, the emission time periods being at least 10 nanoseconds;
an electromagnetic radiation sensor comprising a plurality of photodetectors arranged in an array of rows and columns, wherein the electromagnetic radiation sensor is configured to sense the non-steady-state emission from the emissive species during the emission time period; and
processing circuitry configured to:
sequentially read out rows or columns of the array to provide a plurality of time-encoded signals; and
identify a characteristic of the emissive species based on a comparison of at least two of the plurality of time-encoded signals.
2 . An imaging device as in claim 1 , wherein the emissive time periods are at least 100 nanoseconds.
3 . An imaging device as in claim 1 , wherein the emissive time periods are at least 1 microsecond.
4 . An imaging device, comprising:
a source of electromagnetic radiation configured to emit radiation to excite non-steady-state emission in emissive species during emission time periods of the emissive species, the emission time periods being at least 10 nanoseconds;
an electromagnetic radiation sensor, wherein the electromagnetic radiation sensor is configured to sense the non-steady-state emission from the emissive species during the emission time period; and
processing circuitry configured to:
globally expose and/or read data from the electromagnetic radiation sensor to provide a plurality of time-encoded signals and
identify a characteristic of the emissive species based on a comparison of two or more of the plurality of time-encoded signals.
5 . An imaging device as in claim 1 , wherein the source of electromagnetic radiation is configured to emit radiation to excite a steady-state emission in a second emissive species.
6 . An imaging device as in claim 1 , wherein a second source of electromagnetic radiation is configured to emit radiation to excite a steady-state emission in a second emissive species.
7 . An imaging device as in claim 1 , wherein the second emissive species is the same as the emissive species.
8 . An imaging device as in claim 1 , wherein the second emissive species is different than the emissive species.
9 . An imaging device as in claim 1 , wherein the electromagnetic radiation sensor is configured to sense the detectable steady-state emission.
10 . An imaging device as in claim 1 , wherein the processing circuitry is further configured to:
generate one or more images based on the plurality of time-encoded signals, and wherein identifying the characteristic of the emissive species is based on the one or more images.
11 . An imaging device as in claim 1 , wherein the processing circuitry is further configured to:
generate a first portion of an image based on time-encoded signals for one or more first rows or one or more first columns of the array;
generate a second portion of the image based on time-encoded signals for one or more second rows or one or more second columns of the array, and
wherein identifying the characteristic of the emissive species is based on a comparison of the first portion of the image and the second portion of the image.
12 . A system configured for identification of a characteristic of a chemical tag, comprising:
a chemical tag associated with an article, wherein the chemical tag comprises an emissive species, wherein the emissive species produces a detectable non-steady-state emission during an emission time period of the emissive species under a set of conditions, and wherein the emission time period is at least 10 nanoseconds;
an excitation component configured to excite the emissive species under the set of conditions such that the detectable non-steady-state emission, which varies over the image capture time period, is produced;
an image sensor configured to detect the detectable non-steady-state emission; and
an electronic hardware component configured to convert the detected non-steady state emission into a single image,
wherein the single image comprises a first portion corresponding to a first portion of the emission time period of the emissive species and a second portion corresponding to a second portion of the emission time period of the emissive species, and
wherein a difference between a property of the first portion and the second portion is associated with a characteristic of the chemical tag.
13 . A system as in claim 12 , wherein the emissive species produces a detectable steady-state emission.
14 . A system as in claim 12 , comprising a second emissive species, different th(Currently Amended) An the emissive species, wherein the second emissive species produces a detectable steady-state emission under a set of conditions.
15 . A system as in claim 12 , wherein the image sensor is configured to detect the detectable steady-state emission.
16 . A system as in claim 12 , wherein at least one characteristic of the detectable non-steady state emission varies during detection of the detectable non-steady state emission by the image sensor.
17 . A system as in claim 12 , wherein the emissive species is a chemical and/or biological species.
18 . An imaging system as in claim 12 , wherein the chemical tag comprises a plurality of emissive species.
19 . A system as in claim 12 , wherein the excitation component is configured to excite a plurality of emissive species.
20 . A system as in claim 12 , wherein at least two emissive species of the plurality of emissive species are chemical and/or biological species.
21 - 50 . (canceled)