L-LAS Serie - Laser Line Sensors - Sensor Instruments - #1

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L-LAS Series • Laser Line Sensors Product Information info@sensorinstruments.de • www.sensorinstruments.de (2007-01-25) L-LAS Series / Page 1 of 28 Subject to alteration Sensor Instruments GmbH • D-94169 Thurmansbang • Schlinding 11 Tel. +49 (0)8544 9719-0 • Fax +49 (0)8544 9719-13 L-LAS Series Laser Line Sensors Line sensors are applied where precise positioning is required or where the dimensions of an object have to be determined with high accuracy, e.g. diameter of a wire. The laser line sensors of L-LAS series offer various operating widths with a resolution of up to 1024 pixels. An analog output (voltage output and current output) informs about position and size of the object. Furthermore, a digital output is available that offers information about quality and position of the object. By means of serial interface RS232 communication can be done via PC (or PLC + RS232 module). Characteristics Parameterization under Windows® with software L-LAS-TB Scope, L-LAS-MS-Scope, L-LAS-LT-Scope, L-LAS-GD-Scope, LINE-Scope The sensors can easily be set with the help of a Windows® user interface in which the sensor signals are displayed in numerical and graphical form; the user interface also provides various software algorithms and setting parameters. Parameters such as e.g. - Threshold (video threshold) - Evaluation algorithm (thickness - Laser power measurement, „gap-size“ measure-, - Averaging ment, edge detection, etc.) - Polarity of output signal - Laser power correction - Display in mm, inch, or pixel - Threshold correction - Exposure time of laser line (video threshold correction) can be set with the software. Functional principle of the sensor L-LAS-TB laser line sensors are one-way light barriers. A laser collimator that generates a gap-shaped laser light curtain is used as a transmitter. Greatest importance was attached to keeping the divergence of this laser light curtain correspondingly low, i.e. to make sure that parallel laser light is provided. The object is positioned between the transmitter and receiver unit of the sensor system; when the laser light curtain impinges on the object, a shadow of this object is created. The divergence of this shadow also is very small, i.e. the shadow is cast almost absolutely parallel. Then the laser light curtain (incl. shadow) impinges on the optical receiver. The task of the optical receiver is to project the laser light curtain onto the respective line sensor. The L-LAS-LT laser line sensors operate according to the principle of triangulation, i.e. laser transmitter and receiver are arranged in a certain angle to each other. In the so-called reference distance the two optical axes of transmitter and receiver meet, the receiver signal lies in the center of the line receiver. Part of the laser light that is reflected from the measuring object is projected from the receiver optics onto the line detector. The distance between measuring object and sensor is calculated by means on an integrated controller. Features - Telecentric beam path - Various models available (in fork shape or split shape) - Various operating widths available - Resolution up to 1024 pixels - Insensitive to outside light due to interference filter, polarisation filter, and mechanical covers - External TEACH-function - Sturdy metal housing - Parameterisable under Windows®, RS232 interface (USB adaptor available) - Laser class 2 (visible laser light, 670 nm) - Thickness measurement of objects respectively measurement of the distance between two objects - Counting of objects in the lens coverage