Laser Sensor For Reflective And Shiny Surfaces

The laser sensor is specially designed for reflective and shiny surfaces. It is used, for example, for thickness measurements of flat glass, distance measurements on tempered glass or for monitoring the assembly of small parts. The measuring rate can be set up to 49 kHz, which means that the sensor can be used for dynamic process monitoring. He works with the innovative Advanced Real-Time-Surface-Compensation (A-RTSC), which should allow an exact real-time surface compensation of different surfaces.

Available with different interfaces

Data output is via Ethernet or RS422, the Ethercat version will also be available soon. If the sensor is operated with the universal controller CSP2008, which enables a synchronous recording of measured values ​​and calculation of the measured values ​​for material thickness and width, an analog output is also available, according to Micro-Epsilon.

According to the manufacturer, the sensor is designed so that it can be positioned parallel to the measurement object. As a result, the blue laser light is reflected directly from the measurement object onto the receiving optics. Because the blue laser light, in contrast to the red one, does not penetrate the measurement object, it forms a sharp point and enables a stable signal on the receiving element. This enables the sensor to implement resolutions down to the nanometer range. The extremely small light spot also allows measurements on tiny objects. Another special feature of the new Opto NCDT 2300-2DR, according to Micro-Epsilon, is its size: According to it, it should be the only laser sensor worldwide in this class of sensors whose entire electronics are integrated in the compact housing.

Principle of optical triangulation

The Opto NCDT 2300-2DR is based on the principle of optical triangulation. A visible, modulated point of light is projected onto the surface of the measurement object. The direct portion of the reflection of this light spot is imaged by a receiver optics on a spatially resolving CCD element depending on the distance. A digital signal processor in the sensor calculates the distance of the light spot on the measurement object from the sensor from the output signal of the CCD element. The distance value is linearized and output via a digital interface. (jv)

Sensor technology and measurement technology

Sensor technology and measurement technology recorded growth in all areas in 2016