Agilent Technologies 5517B

Specifications 8
Agilent 5517B/BL/C/D/DL/FL User’s Guide 75
Tab le 1 5 Agilent Laser Head Specifications and Characteristics
Description: The Agilent Laser Head Laser Head contains an automatically tuned Helium-Neon laser, circuits to control
the laser, and a reference optical receiver. The laser generates a coherent, collimated, two-frequency beam of light. This
is a Class II Laser Product conforming to U.S. National Center for Devices and Radiological Health Regulations 21CFR
1040.11 AND 1040.11
Laser Beam
Type Helium-Neon, continuous wave output, two-frequency (Heterodyne)
Polarizations
Lower frequency, f
1
Higher frequency, f
2
Parallel to laser head base
Perpendicular to laser head base
Reference signal Differential square wave (DC isolated), TTL levels
Duty 50% ±1% typical
Reference frequency
(Difference between f
1
and f
2
)
5517B/BL
5517C
5517D
5517DL
5517FL
1.9 to 2.4 MHz
2.4 to 3.0 MHz
3.4 to 4.0 MHz
³4.4 MHz
³7.0 MHz
Velocity of motion (maximum)
1
5517B/BL
5517C
5517D
5517DL
5517FL
500 mm/s
711 mm/s
1000 mm/s
1200 mm/s
2000 mm/s
Beam diameter (visible, typical) 6 mm (0.24 in), 3 mm (0.12 in), and 9 mm (0.35 in) beam diameters are available on
some models.
Wavelength (vacuum, nominal.) 632.991354 nm for 5517B/BL/C/D/DL/FL
Wavelength accuracy
(vacuum 3 sigma, lifetime)
± 0.1 ppm standard. With optional calibration: +-0.02
Wavelength stability (vacuum,
typical)
1 hour
Lifetime
± 0.002 ppm
± 0.02 ppm
Measurement range (nominal) 40 meters (130 feet) for the sum of all axes