Radiant energy – Photocells; circuits and apparatus – With circuit for evaluating a web – strand – strip – or sheet
Patent
1994-02-18
1996-09-17
Westin, Edward P.
Radiant energy
Photocells; circuits and apparatus
With circuit for evaluating a web, strand, strip, or sheet
356376, G01N 2100, G01B 1124
Patent
active
055571131
ABSTRACT:
A method and apparatus for generating a surface image of a target. The laser beam of a confocal laser microscope is moved along a scanning pattern on an area of a target. During each scanning pattern, the resulting electronic focus signal of the microscope is sampled at defined positions along the scanning pattern to generate a frame of pixel intensity values. At the end of each scanning pattern, the height of the target is slightly increased. A new frame of pixel intensity values is generated for each height of the target. The pixel intensity values of the frames are compared. The maximum pixel intensity value for each defined position along the scanning pattern is stored to create a single frame representative of the surface image of the target. In an alternate embodiment, the height at which each maximum pixel intensity value was measured is stored in a separate memory.
REFERENCES:
patent: Re34749 (1994-10-01), Leong et al.
patent: 4935635 (1990-06-01), O'Harra
patent: 5187506 (1993-02-01), Carter
patent: 5289261 (1994-02-01), Yogo et al.
Fairley Christopher R.
Helgesson Alan
Moorhouse Abigail A.
Rigg Phillip R.
Hoffman E. Eric
Lee John R.
MacPherson Alan H.
Ultrapointe Corp.
Westin Edward P.
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