Patent ID: 8907312
Filing Date: 2014-12-09
Classification: G01N

Abstract:
1. A flow cytometry system, comprising: a flow element through which a cell is transported in a flowing fluid, the flow element comprising a bore bounded by a wall, at least a portion of the wall being substantially transparent; a light source configured to illuminate the cell; a light sensor; and an optical system that receives light emanating from the illuminated cell and directs at least some of the received light to the light sensor, the optical system comprising an objective lens and a numerical-aperture-increasing lens, the numerical-aperture-increasing lens being at the wall of the flow element, at least some of the received light passing through the numerical-aperture-increasing lens before reaching the objective lens, wherein the numerical-aperture-increasing lens effectively increases the numerical aperture of the optical system as compared with the numerical aperture of the objective lens without the numerical-aperture-increasing lens.