Pseudo telecentric optical design for flow cytometric blood cell analyzer
First Claim
1. A flow cytometric optical system for the simultaneous detection of several characteristics of particles suspended in a flowing medium comprising:
- a flowcell through which the particles pass substantially one particle at a time;
a light directing optical system for directing light from a light source onto the flowing particles in the flowcell;
a side angle optical collection system for receiving light from the flowing particles, and for directing the light to one or more of a first set of detectors;
a forward angle collection system for receiving light from the flowing particles, and for directingthe light to one or more of a second set of detectors;
wherein the side angle optical collection system comprises a condenser lens for directing light toward the first set of detectors, an exit pupil of the condenser lens located at the back focal plane of the condenser lens, and a photosensitive surface of one or more of the first set of detectors located at conjugate points of the back focal plane of the condenser lens such that an image of the exit pupil is positioned at the photosensitive surface of the one or more of the first set of detectors; and
wherein the forward angle optical collection system comprises a collecting lens for directing light toward the second set of detectors, wherein the collecting lens exit pupil located in the back focal plane of the collecting lens, a photosensitive surface of one or more of the second set of detectors located at the back focal plane of the collecting lens.
1 Assignment
0 Petitions
Accused Products
Abstract
A pseudo telecentric flow cytometric optical system for the simultaneous detection of several characteristics of particles suspended in a flowing medium. The system is made up of a flowcell through which the particles pass substantially one particle at a time, an optical system for directing light from a light source onto the flowing particles in the flowcell, a side angle optical collection system for receiving light from the flowing particles and for directing the light to one or more of a first set of detectors, and a forward angle collection system for receiving light from the flowing particles and for directing the light to one or more of a second set of detectors. The side angle optical collection system can include a condenser lens for directing light toward the first set of detectors with an exit pupil of the condenser lens located at the back focal plane of the condenser lens; a photosensitive surface of one or more of the first set of detectors is located at conjugate points of the back focal plane of the condenser lens such that an image of the exit pupil is positioned at the photosensitive surface of one or more of the first set of detectors. The forward angle optical collection system can include a collecting lens for directing light toward the second set of detectors where the collecting lens exit pupil is located in the back focal plane of the collecting lens and a photosensitive surface of one or more of the second set of detectors is located at the back focal plane of the collecting lens.
-
Citations
34 Claims
-
1. A flow cytometric optical system for the simultaneous detection of several characteristics of particles suspended in a flowing medium comprising:
-
a flowcell through which the particles pass substantially one particle at a time; a light directing optical system for directing light from a light source onto the flowing particles in the flowcell; a side angle optical collection system for receiving light from the flowing particles, and for directing the light to one or more of a first set of detectors; a forward angle collection system for receiving light from the flowing particles, and for directingthe light to one or more of a second set of detectors; wherein the side angle optical collection system comprises a condenser lens for directing light toward the first set of detectors, an exit pupil of the condenser lens located at the back focal plane of the condenser lens, and a photosensitive surface of one or more of the first set of detectors located at conjugate points of the back focal plane of the condenser lens such that an image of the exit pupil is positioned at the photosensitive surface of the one or more of the first set of detectors; and wherein the forward angle optical collection system comprises a collecting lens for directing light toward the second set of detectors, wherein the collecting lens exit pupil located in the back focal plane of the collecting lens, a photosensitive surface of one or more of the second set of detectors located at the back focal plane of the collecting lens. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
-
-
18. A flow cytometric optical system for the simultaneous detection of several characteristics of particles suspended in a flowing medium comprising:
-
a flowcell through which the particles pass; an optical system for directing light from a light source onto the flowing particles in the flowcell; a side angle optical collection system for receiving light from the flowing particles, and for directing the light to one or more of a first set of detectors; a forward angle collection system for receiving light from the flowing particles, and for directing said light to one or more of a second set of detectors; wherein the side angle optical collection system comprises a condenser lens for directing light toward the first set of detectors, an exit pupil of said condenser lens located at the back focal plane of said condenser lens, and a photosensitive surface of one or more of said first set of detectors being located at conjugate points of the back focal plane of said condenser lens, such that an image of said exit pupil is positioned at the photosensitive surface of one or more of the first set of detectors; and wherein the forward angle optical collection system comprises a collecting lens for directing light toward the second set of detectors, an exit pupil of the collecting lens located in the back focal plane of the collecting lens, and a photosensitive surface of one or more of the second set of detectors being located at conjugate points of the back focal plane of said collecting lens, such that an image of said exit pupil is located at the photosensitive surface of one or more of the second set of detectors. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
-
Specification