Scanning unit with a printed circuit for an optical position-mea

Details Scanning unit with a printed circuit for an optical position-mea Scanning unit with a printed circuit for an optical position-mea

1997-12-02

2000-03-28

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250237G, G01D 534

Patent

active

060434821

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.

REFERENCES:
patent: 4661698 (1987-04-01), Cappio et al.
patent: 4906838 (1990-03-01), Sogabe et al.
patent: 5486923 (1996-01-01), Mitchell et al.
patent: 5534693 (1996-07-01), Kondo et al.
patent: 5866942 (1999-02-01), Suzuki et al.
Kober, H. et al., "Flexibel verdrahten auf kleinstem Raum," F&M, pp. 356-359, (1996).

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