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Chapter 5 Laser Heads General
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2010-07-06
靓仔峰
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General
One laser head is required in most measurement systems, regardless of
the number of measurement axes in the system.
The wavelength of light from the laser head is used as the length
standard for Agilent laser measurement systems. The laser head
generates a coherent (all light waves in phase), collimated (all waves
traveling parallel to one another), light beam consisting of two
orthogonally polarized frequency components. To differentiate between
the frequencies, the lower frequency is identified as f1 and the higher
as f2.
The difference between these two frequencies is the “Reference
Frequency”, listed in Table5-1.
One laser head is required in most measurement systems, regardless of
the number of measurement axes in the system.
The wavelength of light from the laser head is used as the length
standard for Agilent laser measurement systems. The laser head
generates a coherent (all light waves in phase), collimated (all waves
traveling parallel to one another), light beam consisting of two
orthogonally polarized frequency components. To differentiate between
the frequencies, the lower frequency is identified as f1 and the higher
as f2.
The difference between these two frequencies is the “Reference
Frequency”, listed in Table5-1.
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