The grey side reflects 18 86 festo didactic gmbh co

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Unformatted text preview: tection (IEC 529, DIN 40050) up to IP67 Ambient operating temperature 0 – 60 °C or -25 – +80 °C Table 6.4.1: Technical data of diffuse sensors As a rule, the sensing width specified in data sheets refers to white cardboard, whereby the white reverse side of a Kodak grey card CAT 152 7795 is generally used. The white side of this test card has a constant reflection of 90 % within a spectral range of approximately 450 – 700 nm. The grey side reflects 18 %. 86 © Festo Didactic GmbH & Co. KG • FP 1110 6. Optical proximity sensors 3 1 Emitter/Receiver (1) 2 Emitting range (2) Response curve (3) For small distances: Small diffuse reflecting surface required. For large distances: Large back-reflection surface required. Fig. 6.4.2: Response curves of diffuse sensors Advantages of the diffuse sensor 6.4.3 Notes on application • Because the reflection on the object activates the receiver, an additional reflector is not required. • The object can be diffuse reflecting, mirroring or transparent to translucent as lon...
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