Light scattering and imaging optical system
First Claim
Patent Images
1. A system for scattered light capture, comprising:
- a flow channel for conveying particles;
a light source for providing light through the flow channel;
a detector array for detecting light from the flow channel; and
a lens, situated between the flow channel and the detector array, having a plurality of annular zones and an axis, wherein each of the plurality of annular zones extends outward from the axis of the lens, wherein the lens is a hybrid lens having focusing and grating properties for affecting the light from the flow channel to the detector array;
wherein at least one detector of the detector array is for detecting FALS and/or SALS scattered light and at least one detector of the detector array receives light of an image of the target.
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Abstract
An optical element for conveying scattered and image light to several detectors. The optical element may have the properties of a diffractive beam splitter and imaging lens. The detected light may be from an illuminated target. Further, there may be an optical element for conveying scattered light from a target via several zones to specific detectors, respectively. The latter optical element may include a multiple annular zone diffractive structure on a hybrid lens.
122 Citations
20 Claims
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1. A system for scattered light capture, comprising:
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a flow channel for conveying particles; a light source for providing light through the flow channel; a detector array for detecting light from the flow channel; and a lens, situated between the flow channel and the detector array, having a plurality of annular zones and an axis, wherein each of the plurality of annular zones extends outward from the axis of the lens, wherein the lens is a hybrid lens having focusing and grating properties for affecting the light from the flow channel to the detector array;
wherein at least one detector of the detector array is for detecting FALS and/or SALS scattered light and at least one detector of the detector array receives light of an image of the target. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for detection comprising:
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providing a single optical element having a focusing lens with a diffracting structure having a plurality of angular diffractive zones; providing a single detector array; directing scattered light with the optical element from a target to a first detector of the detector array; directing imaging light with the optical element from the target to a second detector of the detector array. - View Dependent Claims (8)
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9. A method for detection comprising:
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providing light through a flow channel for conveying particles; providing a single optical element having both focusing and grating properties; and directing both focused and scattered light from the flow channel with the optical element via a plurality of annular zones to a plurality of adjacent detectors on a single detector array, respectively; and
the optical element comprises a multiple zone diffractive structure on a single lens. - View Dependent Claims (10, 11, 12, 13)
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14. An optical system comprising:
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a light source situated on an optical axis for illuminating particles in a flow channel which scatter light at the optical axis in the flow channel; a single optical element, having an imaging lens with a plurality of angular zone diffractive surface structures, for focusing and redirecting scattered light from the particles on to an array of photodetectors, the array being approximately centered on the optical axis; light scattered at a first angular zone relative to the optical axis is redirected by a diffractive surface structure of the optical element to a first detector of the array of photodetectors; light scattered at a second angular zone relative to the optical axis is redirected by a diffractive surface structure of the optical element to a second detector of the array of photodetectors; and light scattered at a third angular zone relative to the optical axis is redirected by a diffractive surface structure of the optical element to a third detector of the array of photodetectors;
at least one detector of the array of photodetectors received light focused from the single optical element;
wherein the light source illuminates the particles in the flow channel without intervening optical elements. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification