Apparatus for the production of an ophthalmic lens
AssigneeInnovative Research Corporation
InventorsDieter W. Blum, Andrew S. Duncan
Life of this patent
Estimating the term…
Abstract
Apparatus for the positional control of the edge grinding of an ophthalmic lens to a desired peripheral shape is effected by a control computer which processes and stores data representative of a pattern which delineates the peripheral shape of the lens. The data is derived by rotating a linear image sensor about an axis passing through a support for a pattern which delineates the required shape. The sensor generates pixel data which is processed and stored by the control computer for use for selective control of a lens periphery grinder.
Claims12
Apparatus for the production of an ophthalmic lens by positional control of the edge grinding of a lens, comprising:
- means for supporting a pattern which delineates the peripheral shape of an ophthalmic lens;
- a linear image sensor mounted for rotation about an axis passing through said supporting means;
- and
- a control computer connected to said sensor to process and store pixel data generated by said rotating sensor for selective control of a lens periphery grinder.
Apparatus for the edge grinding of an ophthalmic lens comprising:
- a support for a pattern cam which represents the peripheral shape of an ophthalmic lens;
- means for illuminating said support;
- a linear image sensor mounted for rotation about an axis passing through said support;
- means for rotating said sensor about said axis;
- an optical system between said support and said sensor for producing an image of said pattern cam for scanning by said sensor;
- and
- control computer means connected to said means for rotating said sensor, which control computer means is connected to said sensor and is operable to process and store pixel data generated by said rotating sensor for selective control of an ophthalmic lens periphery grinder.
Apparatus for the edge grinding of an ophthalmic lens to a desired peripheral shape, comprising:
- a lens periphery grinder including a sensing device for sensing the position of a lens edge relative to grinding means and for producing an actual position signal;
- and
- means responsive to a positioning signal from control computer means to determine the relative position of said lens and said grinding means;
- and
- said control computer means including a comparator operable to compare said actual position signal with stored data generated by sensing a pattern which delineates the desired peripheral shape of the lens, and to produce said positioning signal for transmission to said lens periphery grinder.
Apparatus for the edge grinding of an ophthalmic lens to a desired peripheral shape, comprising:
- a support for a pattern representing the peripheral shape of a lens;
- a linear image sensor mounted for rotation about an axis passing through said support;
- control computer means connected to said sensor to process and store pixel data generated by said rotating sensor;
- and
- means connected to said control computer means for sensing the position of a lens edge relative to grinding means of a lens periphery grinder, and for producing an actual position signal;
- said control means including comparator means operable to compare said stored pixel data with said actual position signal and to produce a positioning signal;
- and
- said lens edge grinder including means responsive to said positioning signal to determine the relative position of a lens to be ground and said grinding means.
Dependencies are inferred from the claim text.