Patent ID: 8212202
Filing Date: 2012-07-03
Classification: G01D

Abstract:
1. A reflective optical encoder package, comprising: an integrated circuit comprising a light detector formed on or near a first substantially planar surface thereof, the integrated circuit further comprising at least one recess formed in or near the first surface and configured to accept a light emitter therewithin, a second substantially planar surface opposing the first surface; and a first optically transmissive pre-formed layer having a substantially planar bottom surface; the pre-formed layer being disposed over the light detector and a light emitter positioned in the recess, the pre-formed layer being attached to at least portions of the first surface by means of at least one of epoxy, an adhesive, sputtering, and a mechanical connection; wherein the light emitter, the first layer and the light detector are configured to permit at least a portion of light emitted by the light emitter to traverse the first layer in an upward direction for reflection from a code scale disposed above the reflective optical encoder package and thence downwardly through the first layer for detection by the light detector; and a second optically transmissive pre-formed layer disposed beneath the integrated circuit and attached to the second surface, wherein no part of the second pre-formed layer is in direct contact with any part of the first pre-formed layer.