Laser Focus Sensor Laser Focus Sensor

Laser Focus Sensor(LFS)

Coaxial Measurement with 10-micron Precision

Coaxial Online Inspection

The Laser Focus Sensor (LFS) is a micron-level coaxial focus measurement instrument. It offers high measurement accuracy, a long measurement range, and real-time feedback, providing an effective solution for workstations with demanding requirements for welding focus stability. Furthermore, the LFS can be integrated with the Welding Defect Detection (WDD) to comprehensively ensure product quality and process stability.

Traditional focus detection:
always slightly off the mark in precision.

Advantages of LFS

Coaxial Detection
Coaxial Detection

Measuring point=Welding point.

No mechanical movement, no mechanical error.

Free of Obstruction
Free of Obstruction

Avoid blocking of the optical path by the optical axis.

Detection bypass the copper nozzle without concern fixture obstruction.

No movement required
No movement required

Minimise factors affecting the cycle

High processing efficiency

Real-time Feedback
Higher Accuracy

Coaxial measurement,
capture every focus deviation.

Tab/Connector Welding Busbar Welding
The system performs simultaneous, independent monitoring of multiple welding zones. It can identify virtually any condition that affects the defocus distance deviation, enabling stable and rapid inspection.
It measures the height positions of two specified points and detects the height difference between them. Simultaneously, it monitors the overall height variation of the target object, achieving stable and rapid inspection.

Parameter

Response Time
≤ 100ms (single cycle ~15ms)
Measurement Accuracy
Maximum 50μm※1
Measuring Distance
Depends on laser welding head length
Measuring Range
≥ 10mm※2
Light Source
940nm
Integration Options
SDK provided for customer intergration
Communication Protocols
TCP/IP/Analog/IO
Interface Type
I/O, 100M/Gigabit Ethernet, AO
Power Supply
DC±12V
Protection Level
IP50
Operating Temperature
+5℃ to +55℃
Relative Humidity
≤ 90%
 
Note:※1.Affected by workpiece surface roughness and laser head focal length
  ※2.Depends on focusing lens focal length
  ※3.15min preheating required before use