Viewing apparatus having oblique illumination

Details Viewing apparatus having oblique illumination Viewing apparatus having oblique illumination

1997-07-10

1998-11-17

Nguyen, Thong

Optical: systems and elements

Compound lens system

Microscope

359368, 359383, G02B 2106, G02B 2100

Patent

active

058384910

ABSTRACT:
A viewing arrangement includes an objective (5) having a variable intersection distance and an intersection-distance dependent oblique illumination (7) which is separate from the objective (5). The oblique illumination (7) includes two illuminating beam paths (9, 11) for completely illuminating contoured objects without shadows. The illuminating beam paths (9, 11) are inclined toward each other ahead of the object (13, 16) to be viewed. The mutual inclination of the two illuminating beam paths (9, 11) is dependent upon the particular intersection distance of the objective (5).

REFERENCES:
patent: 5253106 (1993-10-01), Hazard
patent: 5748367 (1998-05-01), Lucke et al.

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