Optics: measuring and testing – Lens or reflective image former testing – For optical transfer function
Patent
1986-07-10
1988-04-19
Rosenberger, R. A.
Optics: measuring and testing
Lens or reflective image former testing
For optical transfer function
8507, G01B 900
Patent
active
047385308
ABSTRACT:
An inspection device for visually ascertaining the desired alignment of a contact lens in a tinting fixture comprises a base and a platform having a flat surface and mounted to the base for rotation relative thereto. The device also includes an arrangement for mounting the fixture for rotation in unison with the platform and for aligning the fixture relative to the platform flat surface in such a way as to maintain the contact lens in an alignment wherein substantially the entire peripheral edge thereof is located in a plane substantially parallel to the platform flat surface, if the contact lens is in the proper desired alignment in the tinting fixture, and such that the tinting fixture is centered relative to the center of rotation of the platform. A viewing arrangement is provided for visually observing the position of the contact lens peripheral edge during rotation of the platform relative to the base to thereby ascertain whether the contact lens is in the desired alignment relative to the tinting fixture. A method for visually ascertaining the desired alignment of a contact lens in a tinting fixture defining an axis, comprises the steps of aligning the fixture such that the contact lens, if in the desired alignment in the fixture, is substantially centered with respect to the fixture and a peripheral edge thereof defines a plane substantially parallel to a given, substantially flat end surface of the fixture. The method proceed by rotating the fixture about its axis, and visually observing the relative position of the peripheral edge during rotation to thereby ascertain whether the contact lens is in the desired alignment relative to the tinting fixture.
REFERENCES:
patent: 3519357 (1970-07-01), Davis
patent: 3985445 (1976-10-01), Tagnon
patent: 4232966 (1980-11-01), Schpak et al.
Kanner Rowland W.
Rabenau Richard
Ryder Francis E.
Cooper Crystal D.
Frangos Irene J.
Giangiorgi Richard A.
National Patent Development Corporation
Rosenberger R. A.
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