Back to results
US 5,179,287 AGranted
Displacement sensor and positioner
AssigneeOMRON Corporation
InventorsKourou Kitajima, Hiroshi Sekii
Life of this patent
Estimating the term…
Abstract
The invention provides a displacement sensor comprising a light-emitting element for projecting a detection light towards an object in a substantially perpendicular direction, a condensing element for condensing a reflected light from the object, and a position sensitive device with its light-receiving surface disposed in parallel with the axis of the detection light. A positioning apparatus employing the above displacement sensor is also disclosed.
Claims18
A sensor for detecting object displacement comprising:
- a light-emitting element for projecting a detection light along an axis towards said object in a substantially perpendicular direction, said light being reflected by said object at an oblique angle relative to said detection light axis;
- a condensing element for condensing light reflected at said oblique angle;
- a position sensitive device having a light-receiving surface disposed in parallel with said detection light axis, said position sensitive device receiving said reflected light from said condensing element at locations on said light receiving surface which represent and are proportional to the displacement of said object.
A positioning apparatus comprising:
- a chassis;
- and
- a sensor for determining displacement of an object with respect to said chassis, said sensor being mounted on said chassis and comprising:
- a light-emitting element for projecting a detection light along an axis towards said object in a substantially perpendicular direction, said light being reflected by said object at an oblique angle relative to said detection light axis;
- a condensing element for condensing light reflected at said oblique angle;
- and
- a position sensitive device having a light-receiving surface disposed in parallel with said detection light axis, said position sensitive device receiving said reflected light from said condensing element at locations on said light receiving surface which represent and are proportional to the displacement of said object.
4 more elements
Dependencies are inferred from the claim text.