HP 5518A Laser Head and Receiver

The HP 5518A Laser Head, used in HP interferometer systems, is similar in function to the more recently introduced HP 5519A Laser Head. It includes an internal measurement receiver, but it requires an external power supply. The HP 5518A is used primarily as the laser source in HP's 5528A Laser Measurement system. It can also be used in place of an HP 5519A Laser Head when upgrading an HP 5528A system to an HP 5529A Dynamic Calibrator. The HP 5518A has a laser beam diameter of 6 mm, and offers a vacuum wavelength accuracy of +/-0.1 ppm. The laser head uses a proven long-life laser tube with a demonstrated Mean Time Between Failure (MTBF) of greater than 50,000 hours of operation.

The HP 5518A is configured with appropriate optics and system electronics to build a laser interferometer system that meets the unique physical layout and measurement requirements of individual applications. The custom positioning system improves product quality, increases yields, and facilitates manufacture of precision products.

[ Features ]

Helium-neon, continuous wave, two-frequency laser
Fast warm-up (typically four minutes)
Internal measurement receiver
Industry-leading reliability

[ Specifications ]

Physical Characteristics
Weight: 5.5 Kilograms (12 pounds)

Magnetic Field Strength (Non-Operating):
	Does not exceed 5.25 milligauss at a distance of 460 cm (15 ft) from
	any point on the surface of the packaged Laser Head.

Clearance Required for Cabling: 10.16 cm (4 in) beyond back



Power
Power Input Requirements:
	+15 Volts +/- -0.3 Volts at 25 Amperes maximum
	-15 Volts +/-0.l3 Volts at 0.02 Ampere maximum

Heat Dissipation: 
	23 watts during operation
	35 watts during warmup



Laser Beam Characteristics
Maximum Beam Power Output: 1 milliwatt

Minimum Beam Power Output: 180 microwatts

Beam Diameter: 6 millimeters (0.25 inch) typical

Vacuum Wavelength Accuracy (3 sigma, lifetime): 0.1 ppm

Vacuum Wavelength Stability:
	typical 1 hour:		0.002 ppm
	typical lifetime:	0.02 ppm

Nominal Vacuum Wavelength: 632.99137 nanometers



Outputs
Reference Frequency:
	1.7 to 2.4 MHz for HP 5518As with serial number 2532A02139 and above.
	1.5 to 2l.0 MHz for previous HP 5518As

[ Ordering ]

HP 5518A Laser Head and Receiver Opt 1BN MIL-STD 45662A Calibration Opt 1BP MIL-STD 45662A Calibration with Test Data Opt AV4 User's manual Opt UK6 ISO 9001/2 Commercial Calibration Certification with Test Data Opt W30 3 Year Return Repair Service Opt W50 5-Year Return Repair Service

The HP 5518A can be used in a variety of laser-interferometer
positioning systems, including the HP 5528A Calibrator system.

The HP 5529U is an upgrade kit that includes products required to use
the HP 5518A as part of a 5529A Dynamic Calibrator system.

[ Assistance ]

To help you make the right instrument choices

Local Sales Office

[ Related ]

Related product families available online:

Laser Heads

Laser Interferometer Calibrator System