Dimensional MeasurementsLaser MeasurementsTechnical Contact: Please contact the technical staff before shipping instruments or standards to the address listed below. Mailing Address:
Fees are subject to change without notice. back to top | back to index of dimensional measurements Laser Frequency/Wavelength (14510S-14511S)The frequency (or, equivalently, the vacuum wavelength) of a red He-Ne laser is determined by comparison to an iodine-stabilized He-Ne laser. The attainable accuracy of this technique is ultimately limited by the uncertainty in the wavelength of the iodine stabilized laser. The relative standard uncertainty of the laser vacuum wavelength at NIST is 5 x 10-11 . The relative expanded uncertainty is 1 x 10-10 . The relative expanded uncertainty can be reduced to 5 x 10-11 on special requests. As a practical matter, however, the uncertainty of a comparison is usually determined by the limited reproducibility of the laser under test. back to top | back to index of dimensional measurements Laser Trackers, B89.4.19 Ranging Test (14520S)Program questions: Calibrations Phone: 301-975-2200, Fax: 301-975-2950 NIST, |
