Optics: measuring and testing – Lens or reflective image former testing – Optical center – cylinder axis – or prism measuring or...
Reexamination Certificate
2006-05-16
2006-05-16
Pham, Hoa Q. (Department: 2877)
Optics: measuring and testing
Lens or reflective image former testing
Optical center, cylinder axis, or prism measuring or...
Reexamination Certificate
active
07046351
ABSTRACT:
An apparatus for measuring eccentricity of an optical lens includes a rotary lens holder which supports a first lens surface of an optical lens by vacuum aspiration; a first determining device for determining whether a curvature center of a central portion of the first lens surface is positioned on the rotational axis; a second determining device for determining whether a curvature center of a peripheral portion of the first lens surface is positioned on the rotational axis; and an eccentricity detection device which detects an eccentricity of the optical lens with respect to the rotational axis to calculate an eccentricity of a vertex of the first lens surface with respect to the radial center of the optical lens, including a detector contacts a rim of the optical lens to detect the eccentricity of the optical lens with respect to the rotational axis.
REFERENCES:
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patent: 5844670 (1998-12-01), Morita et al.
patent: 6-258182 (1994-09-01), None
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patent: 07159283 (1995-06-01), None
patent: 7-229812 (1995-08-01), None
Greenblum & Bernstein P.L.C.
PENTAX Corporation
Pham Hoa Q.
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