Patent · US Expired

Scanning unit with a printed circuit for an optical position-measuring apparatus

US6043482A · kind A · utility

7Cited by

5References

30Claims

0Family size

Assignee

JOHANNES HEIDENHAIN GmbH · DE

Inventors

Rainer Hagl · Cham, DE
Wolfgang Holzapfel · Obing, DE
Hermann Hofbauer · Trostberg, DE
Volker Hofer · Traunreut, DE
Herbert Pronold · Traunreut, DE

Key dates

Filing date	Dec 2, 1997
Grant date	Mar 28, 2000
Priority date	—
Expiry date	Dec 2, 2017

Classification

Technology area (CPC H)Electricity
CPC primaryH05K1/189
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A scanning unit for an optical position-measuring apparatus with a flexible printed circuit that electrically couples several electronic components. Among the components is at least one optoelectronic detector element or a radiation source that is suitable for the generation of shift-dependent modulated optical scanning signals from the scanning of a scale graduation structure. The radiation-sensitive detector face or the light-emitting face of the radiation source is oriented in the direction towards the flexible printed circuit. The flexible printed circuit has at least partially transparent recesses at least in a partial area of the radiation-sensitive detector face or the light-emitting face of the radiation source, a scanning graduation or transmitting graduation is disposed that in cooperation with the scale graduation structure makes possible the generation of position-dependent modulated scanning signals.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.