Optics: measuring and testing – Sample – specimen – or standard holder or support
Patent
1979-06-12
1980-11-11
Corbin, John K.
Optics: measuring and testing
Sample, specimen, or standard holder or support
356124, 294 1CA, G01N 2101
Patent
active
042329663
ABSTRACT:
A device for supporting a contact lens in any desired position with relation to an optical instrument to enable the parameters of the lens, especially the curvature and/or the axes of the surfaces of the lens, to be analyzed. The device comprises a base member which is provided with means for attaching it to an optical instrument such as a keratometer or radiuscope. The base member has an extension which carries a receptacle or container for a solid, resilient, elastomeric, lens-engaging material to which the concave and convex surfaces of a contact lens are removably adherable by slight pressure. The material is dry to the touch, non-blocking (i.e., no adhesion between the lens and the lens engaging material) and non-smearing with respect to the surface of a contact lens, and has a refractive index such that it eliminates reflection from the surface of the lens in contact with the material. A lens, when adhered to the material, can be oriented in any desired plane with respect to an optical instrument. A cover desirably is provided for the receptacle or container to shield the lens-engaging elastomeric material from contaminants, and an alignment card is provided to facilitate initial adjustment of an optical instrument with relation to the vertical axis of a lens. The base member also has lens marking means and angle indicating means which enable the axes of the surfaces of toric lenses to be analyzed quickly and accurately with an optical instrument.
REFERENCES:
patent: 3027804 (1962-04-01), Wesley et al.
patent: 3132887 (1964-05-01), Martinez
Malkes Ian D.
Schpak Fred
Arnold Bruce Y.
Corbin John K.
Laco Laboratories, Inc.
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