dark-field illumination


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Related to dark-field illumination: dark ground illumination, oblique illumination, Dark field microscopy

dark-field illumination

[′därk ‚fēld ə‚lüm·ə′nā·shən]
(optics)
A method of microscope illumination in which the illuminating beam is a hollow cone of light formed by an opaque stop at the center of the condenser large enough to prevent direct light from entering the objective; the specimen is placed at the concentration of the light cone, and is seen with light scattered or diffracted by it.
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Step&Image(TM) 2D Imaging is a high resolution imaging system that uses short pulsed ultra-violet (UV) illumination and a large two dimensional focal plan assembly (FPA) to create die sized images, with both bright-field and dark-field illuminations at a high rate.