Patent ID: 7365834

Claim:
An optical apparatus for detecting anomalies of a sample, comprising: first optics focusing a beam of radiation into a first focused beam at an oblique first incidence angle to a first line focused on a surface of the sample, said first beam and a direction that is through the first beam and that is normal to the surface defining an incidence plane of the first beam, said first line being substantially in the plane of incidence of the first beam; second optics focusing a beam of radiation into a second focused beam at a second incidence angle to an illuminated area on the surface of the sample, said second incidence angle being different from the first incidence angle; a first array of detectors; collection optics collecting scattered or reflected radiation from the first line and/or the illuminated area on the sample surface and originating from the first and/or second beam and focusing the collected radiation from a portion of the line and/or the illuminated area to a corresponding detector in the first array.