Agilent/Keysight 5519A

The Agilent/Keysight 5519A is a helium-neon two-frequency laser head engineered for high-precision dimensional metrology, machine tool calibration, and coordinate measuring machine verification. This Class II laser source delivers 180 µW to 1 mW of continuous-wave output at 633 nm, with vacuum wavelength accuracy of ±0.1 ppm (±0.02 ppm when MIL-STD 45662 calibrated) and 1-hour stability of ±0.002 ppm. The dual-frequency architecture minimizes beam intensity fluctuation effects, enabling reliable heterodyne displacement measurement across multiple optical configurations. Integrated control electronics and power supply support 100–240 Vac operation with 180 µW
• Beam Diameter: 6 mm typical (0.24 in)
• Laser Class: Class II
• Reference Frequency Output: 2.4–3.0 MHz
• Maximum Axis Velocity (Linear Optics): ±0.7 m/s (±28 in/s)
• Maximum Axis Velocity (Plane Mirror Optics): ±0.35 m/s (±14 in/s)
• Maximum Axis Velocity (High Resolution Plane Mirror): ±0.18 m/s (±7 in/s)
• Warm-up Time: <10 minutes
• Operating Temperature: 0–40 °C
• Power Supply: 100–240 Vac, 50–60 Hz; also 110–120 Vac (48–66 Hz or 400 Hz); 220–240 Vac (48–66 Hz)
• Heat Dissipation (Operating): 23 W typical
• Heat Dissipation (Warm-up): 35–50 W
• Physical Weight: 5.5 kg (12 lb)
• Rear Clearance Required: 10.16 cm (4 in)

– Key Features

• Two-frequency laser design eliminates beam intensity fluctuation errors
• Integrated control unit with built-in receiver and power supply
• Long-life helium-neon tube for extended field deployment
• Exceptional short-term and lifetime wavelength stability
• Multiple optical interface options for velocity range optimization

– Typical Applications

• Precision dimensional metrology and machine tool offset verification
• Coordinate measuring machine (CMM) system calibration
• Linear and rotary axis displacement measurement
• Laser interferometry-based calibration workflows

– Compatibility & Integration

The 5519A serves as the laser head component within Keysight 5529A/5529B and 5530 dynamic calibrator systems. The 5519B variant provides higher reference frequency output (3.4–4.0 MHz) for applications requiring maximum slew rates.