Light collecting device with chamber including ellipsoidal surfa

Details Light collecting device with chamber including ellipsoidal surfa Light collecting device with chamber including ellipsoidal surfa

1988-07-01

1989-10-03

Henry, Jon W.

Optics: measuring and testing

For optical fiber or waveguide inspection

350619, 350630, G01N 2153, G01N 2164, G01N 2185, G02B 1706

Patent

active

048712493

ABSTRACT:
A light collecting device for flow cytometry comprises an internally reflecting chamber for collecting light from a point source within the chamber over a solid angle of substantially 4 pi and directing all the collected light through an exit point at or adjacent the wall of the chamber. The chamber comprises an ellipsoidal surface extending over a solid angle of substantially 2 pi and a spherical surface extending over a solid angle of substantially 2 pi, the firsts conjugate focus of the ellipsoidal surface being coincident with the center of curvature of the spherical surface and the second conjugate focus of the ellipsoidal surface being at the center point of the spherical surface. A capillary bore passes through the first conjugate focus to accommodate a sample stream which is illuminated by laser light to produce fluorescence at the first conjugate focus.

REFERENCES:
patent: 4084887 (1978-04-01), Sigler
patent: 4189236 (1980-02-01), Hogg et al.
patent: 4710638 (1987-12-01), Wood

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