Optics: measuring and testing – Inspection of flaws or impurities – Transparent or translucent material
Patent
1993-02-09
1995-08-01
Mintel, William
Optics: measuring and testing
Inspection of flaws or impurities
Transparent or translucent material
356431, 356124, G01N 2115
Patent
active
054384052
ABSTRACT:
A system for grading and evaluating optical elements, such as lenses, filters, reticules and the like, where the tested element is scanned by at least one wedge shaped light beam, which has an angle of about 5 degrees to 35 degrees, and which intersects the surface of the optical element in the form of a narrow rectangle, and at an angle with the surface of the element. Beyond the optical element there is arranged a rotating mask which rotates synchronized with the rotating light beam, so that no direct light reaches an array of photoelements positioned beyond the mask, which array receives light pulses resulting from surface defects and internal defects of the tested optical element. The light signals reaching the said array are evaluated and thus the quality of the optical element is deduced.
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patent: 4815844 (1989-03-01), Schmalfuss et al.
patent: 4822165 (1989-04-01), Schmalfuss et al.
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Lapidot Moshe
Liran Samuel
Stekel Amit
Mintel William
Optomic Technologies Corporation, Ltd.
Williams Alexander Oscar
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