Micro-Epsilon - Confocal-Chromatic Principle: Non-Contact Displacement Sensors

The confocal-chromatic measurement system confocalDT consists of a controller with an LED-light source and a sensor. Both the sensor and the controller are connected via optical fiber up to a distance of 50 m. The distance of the focal point varies due to the chromatic aberration of the sensor optics. A certain distance is assigned to each wavelength in the controller. The reflected light from the target surface is passed to the receiver optics, where the spectral intensity dispersion is evaluated. This unique measuring principle enables displacements and distances to be measured with the highest precision. Both diffuse and specular surfaces can be measured. With transparent materials, a one-sided thickness measurement, or gaps between multiple transparent layers, can be calculated along with the distance measurement using just one sensor.

Unit of Measure

Items	confocalDT IFS2402 4 Millimeter (mm) Diameter Miniature Sensor	confocalDT IFS2403 8 Millimeter (mm) Diameter Hybrid Sensor	confocalDT IFS2404 12 Millimeter (mm) Diameter Compact Sensor	confocalDT IFS2405 27 to 64 Millimeter (mm) Diameter Robust Universal Sensor	confocalDT IFS2406 20 to 27 Millimeter (mm) Diameter Special Sensor
Description	N/A The confocal-chromatic measurement system confocalDT consists of a controller with an LED-light source and a sensor. Both the sensor and the controller are connected via optical fiber up to a distance of 50 m. The distance of the focal point varies due to the chromatic aberration of the sensor optics. A certain distance is assigned to each wavelength in the controller. The reflected light from the target surface is passed to the receiver optics, where the spectral intensity dispersion is evaluated. This unique measuring principle enables displacements and distances to be measured with the highest precision. Both diffuse and specular surfaces can be measured. With transparent materials, a one-sided thickness measurement, or gaps between multiple transparent layers, can be calculated along with the distance measurement using just one sensor.
Sensors Diameter	N/A 4 mm	N/A 8 mm	N/A 12 mm	N/A 27 to 64 mm	N/A 20 to 27 mm
Measuring Range	N/A 0.4 to 2.5 mm	N/A 0.4 to 10 mm	N/A 2 mm	N/A 0.3 to 30 mm	N/A 2.5 to 10 mm
Measurement Mode	N/A Distance Measurement	N/A Distance Measurement Thickness Measurement	N/A Distance Measurement Thickness Measurement	N/A Distance Measurement Thickness Measurement	N/A Distance Measurement Thickness Measurement
Controller Type	N/A Part Number - confocalDT IFC242x Item Name - Confocal controller for industrial applications Measurement Channels - 1 or 2 Measuring Rate - Up to 6.5 kHz Part Number confocalDT IFC2451 Item Name - Universal confocal controller Measurement Channels - 1 Measuring Rate - Up to 10 kHz Part Number - confocalDT IFC2461 Item Name - High-performance controller Measurement Channels - 1 Measuring Rate - Up to 25 kHz Part Number - confocalDT IFC2471 HS Item Name - Confocal high-speed controller Measurement Channels - 1 Measuring Rate - Up to 70 kHz
Approximate Start of Measuring Range	N/A
Note for Approximate Start of Measuring Range	N/A
Static Resolution¹	N/A
Display Resolution²	N/A
Displacement and Distance Linearity³	N/A
Thickness Linearity⁴	N/A
Light Spot Diameter	N/A
Maximum Tilt Angle⁵	N/A
Numerical Aperture (NA)	N/A
Minimum Target Thickness⁶	N/A
Connection	N/A
Installation	N/A
Storage Temperature Range	N/A
Operation Temperature Range	N/A
Shock (DIN-EN 60068-2-27)	N/A
Vibration (DIN-EN 60068-2-6)	N/A
Protection Class (DIN-EN 60529)	N/A
Material	N/A
Housing Material	N/A
Approximate Weight	N/A
System Design	N/A
Customer-Specific Modifications	N/A
Characteristics	N/A
Features	N/A
Note	N/A Each sensor can be operated with every confocalDT controller.
¹ Average from 512 values at 1 kHz, near to the midrange onto optical flat. ² RMS noise relates to mid of measuring range (1 kHz). ³ All data at constant ambient temperature (25 ±1 ºC) against optical flat; specifications can change when measuring different objects. ⁴ All data at constant ambient temperature (25 ±1 ºC) against optical flat; specifications can change when measuring different objects. ⁵ Maximum sensor tilt angle that produces a usable signal on reflecting surfaces. The accuracy decreases when approaching the limit values. ⁶ Glass with refractive index n = 1.5 throughout the entire measuring range. In the mid of the measuring range, also thinner layers can be measured.