X-Rite i1 Pro Manuel De L'utilisateur page 40

Specification
Spectral
engine:
Measurement frequency in scanning
Optics:
Reflectance
measurement:
40
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i1 technology (holographic diffraction grating with 128 pixel diode array)
®
with built-in wavelengths check
Spectral range: 380 - 730 nm
Physical sampling interval: 3.5 nm
Optical resolution: 10 nm
Spectral reporting: 380 nm ... 730 nm in 10 nm steps
mode: 200 measurements per second
Measurement geometry: 45º/0º ring illumination optics, ISO 13655:2009
Measurement aperture: 4.5 mm (0.18") diameter
(effective measurement aperture during scanning is depending on the
patch size and measurement speed)
Illumination spot size: 3.5 mm (0.14")
Light source: Gas filled Tungsten (illuminant type A) and UV LED
spectral reflectance [dimensionless]
Measurement conditions: UV included - ISO 13655:2009 measurement condition M0
D50 - ISO 13655:2009 measurement condition M1
UV excluded Filter - ISO 13655:2009 measurement condition M2