CPC G01N 15/06 (2013.01) [H04N 7/18 (2013.01); H04N 23/56 (2023.01); G01N 2015/0046 (2013.01); G01N 2015/0693 (2013.01)] | 23 Claims |
16. A device for capturing images of airborne particles comprising:
a camera sensor; and
an illumination source structure positioned to emit light towards a field of view of the camera sensor, the illumination source structure comprising:
a bore;
internal threads extending along at least a portion of a length of the bore; and
a light emitting diode (LED) recessed within the bore such that at least a portion of the length of the bore from an opening of the bore to a tip of the LED comprises the internal threads, wherein at least a portion of the internal threads comprises a pitch that increases in a direction from a first end of the bore to a second end of the bore, opposite the first end, and wherein the second end of the bore is closer to the particle inspection zone than the first end of the bore.
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