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US 5,670,781 AGranted
Photoelectrical encoder
AssigneeRenco Encoders, Inc.
InventorRobert Setbacken
Life of this patent
Estimating the term…
Abstract
An encoder including a scale and a light source for illuminating the scale, and a sensing device displaceable relative to the scale in a measuring direction for generating measuring signals, with the sensing device including a transparent carrier provided with a scanning grating, photosensors for converting a position-dependent modulated light into electrical scanning signals defining the measuring signals, and strip conductors provided on a surface of the transparent carrier for forming an electrical connection with the photosensors.
Claims9
An encoder, comprising
- a scale having a graduation;
- a light source-for illuminating the scale;
- and
- a sensing device displaceable relative to the scale in a measuring direction for generating position-dependent measuring signals;
- wherein the sensing device includes a transparent carrier provided with a scanning grating and photosensors arranged behind the scanning grating for converting a position-dependent modulated light into electrical signals defining the position-dependent measuring signals,
- wherein strip conductors are provided directly on a surface of the transparent carrier for forming an electrical connection with the photosensors, and
- wherein the photosensors each have electrical connection contacts which are provided on a light-sensitive side thereof and which are located opposite to and in an electrical contact with respective strip conductors.
4 more elements
Dependencies are inferred from the claim text.