Optical encoder assembly with non-engageable encoder housing and receiver plate comprising a through hole and window

US6600151B2 · kind B2 · utility

Assignee

• Lexmark International, Inc. · US

Inventors

• Alexander Chapman · Lexington, US
• Adam Jude Ahne · Lexington, US
• Michael Anthony Marra, III · Lexington, US
• Christopher Alan Adkins · Lexington, US
• Barry Baxter Stout · Lexington, US
• Patrick Kroger · Versailles, US
• David Michael Cseledy · Lexington, US

Key dates

• Filing date: Sep 19, 2001
• Grant date: Jul 29, 2003
• Expiry date: Jan 9, 2022

Classification

• Technology area (CPC G): Physics
• CPC primary: G01D5/34738
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

An optical encoder assembly for an optical encoder for determining rotation of a rotatable shaft. An encoder housing is non-engageable with the shaft. A receiver plate is attached to the encoder housing, has a first side and a substantially opposing second side, and has a through hole and a window both extending from the first side to the second side, wherein the through hole is engageable with the shaft. An encoder mask is attached to the first side of the receiver plate, has a shaft hole engageable with the shaft, and has a mask grating positioned over the window. A light emitter is aligned to face the first side of the receiver plate and is positioned over the mask grating. A light detector is attached to the second side of the receiver plate and is positioned over the window.