Opto-electronic detector apparatus

US5221960A · kind A · utility

Assignee

• IRO AB · SE

Inventors

• Bo Akerlind · Arlöv, SE
• Jerker Hellstrom · Timrå, SE
• Lars-Berno Fredriksson · Kinna, SE

Key dates

• Filing date: Aug 2, 1991
• Grant date: Jun 22, 1993
• Expiry date: Aug 2, 2011

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B65H2701/31
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

In an opto-electronic detector apparatus, particularly of a yarn storage and feeder apparatus, for detecting at least one yarn or yarn section moving transversely of its longitudinal direction in a detection field, said apparatus comprising a light source, a receiver surface, a photoelectric cell for generating an output signal, and an optical system, the optical system is an optical imaging system (A) having a focus depth defining a predetermined depth (T) of said detection field, and a field of vision of limited dimensions at least in the direction of its width (B), the receiver surface (16) being disposed in the vicinity of the focal plane of the optical imaging system (A), so that said imaging system (A) produced a clear image on the receiver surface (16).