Ball lens micro-cell

Details Ball lens micro-cell Ball lens micro-cell

1989-02-22

1991-08-06

McGraw, Vincent P.

Optics: measuring and testing

Sample, specimen, or standard holder or support

Fluid containers

356410, G01N 2105, G01N 2185

Patent

active

050371991

ABSTRACT:
There is disclosed herein a cell assembly for use in spectrophotometric analysis or detection of a substance within a small sample volume, such as in a capillary sample cell. The assembly comprises a transparent lens having the shape of a ball, sphere or cylinder, referred to as a "ball lens," and which is placed in direct contact or close proximity to the exterior wall of the capillary cell. This lens and cell are mounted together, any may form a removable cell assembly. The small volume may be contained within the ball lens itself. The ball lens serves to concentrate and direct light into the capillary cell. The arrangement also significantly reduces the sensitivity to alignment of replaceable cells thereby permitting easier mounting and replacement of such cells.

REFERENCES:
patent: 3497303 (1970-02-01), Enemark et al.
patent: 3531211 (1970-09-01), Staunton
patent: 3556659 (1971-01-01), Hawes
patent: 4021123 (1977-05-01), Atwood et al.
patent: 4348107 (1982-09-01), Leif
patent: 4492463 (1985-01-01), Marcuse et al.
patent: 4714345 (1987-12-01), Schrader
patent: 4747687 (1988-05-01), Hoppe et al.

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