Dimension Standards

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Calibrated Device 
(1) Stabilized He-Ne Laser (Laser Wavelength & Frequency Calibration)
(2) I2 Stabilized He-Ne Laser (Optical Comb Absolute Frequency Calibration)
Range (1) Wavelength 633 nm (Frequency 474 THz)
(2) Wavelength 633 nm (Frequency 474 THz)
Uncertainty 
(1) 0.03 fm
(2) 0.002 fm 
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