Optical probe having an imaging apparatus

Details Optical probe having an imaging apparatus Optical probe having an imaging apparatus

1998-05-20

2000-11-28

Lee, John R.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

250573, 250216, G01N 2100, G01N 1502

Patent

active

061538736

ABSTRACT:
An imaging apparatus includes a collection of optical elements arranged in a predetermined sequence and cooperable to define a dark-field optical arrangement and a bright-field optical arrangement. The dark-field optical arrangement and a bright-field optical arrangement may be defined along the same or different optical path(s). At least one of the optical elements is operative to enable at least one of the dark field or the bright-field optical arrangements. In a first embodiment said one optical element is movable from a first to a second position to enable either the dark-field or the bright-field optical arrangement. In a second embodiment said one optical element is operable to enable simultaneously both the dark-field and the bright-field optical arrangements. Both opaque objects and phase objects in a fluid stream are able to be detected and quantified.

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patent: 5731894 (1998-03-01), Gross
patent: 5798829 (1998-08-01), Vaez-Iravani

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