Measurement Principle: Dual-beam spectrophotometer

Geometry: Diffuse d/8° reflectance, d/8° total transmission, d/0° regular transmission

Spectrophotometer: Two 256 element diode arrays with a high resolution, concave holographic grating

Sphere Diameter: 152 mm (6 in.)

Sphere Coating: Spectraflect™ for sphere, Duraflect™ for port plate and specular exclusion door

Port Size/Measured Area:
Port Diameter/View Diameter in RSIN/RSEX reflectance modes
Large Area View (LAV): 25 mm (1 in) illuminated/19 mm (0.75 in) measured
Small Area View (SAV): 9.5 mm (0.375 in) illuminated/6 mm (0.25 in) measured
Port Diameter/View Diameter in TTRAN transmittance modes
Large Area View (LAV): 25 mm (1 in) illuminated/17.4 mm (0.69 in) measured
Small Area View (SAV): 25 mm (1 in) illuminated/10 mm (0.40 in) measured
Port Diameter/View Diameter in RTRAN transmittance mode where lens is field stop for all areas of view
Large Area View (LAV): 17 mm (0.67 in) illuminated/17 mm (0.67 in) measured
Small Area View (SAV): 17 mm (0.67 in) illuminated/17 mm (0.67 in) measured
Lens Switching for LAV/SAV: Automatic

Specular Component: Automated Included (RSIN) or Excluded (RSEX) in reflectance

Spectral Range: 360 nm - 780 nm full CIE visible range

Wavelength Resolution: < 2 nm

Effective Bandwidth: 10 nm equivalent triangular

Reporting Interval: 10 nm

Photometric Range: 0 to 150 %

Photometric Resolution: 0.003 % (0.01 % reported)

Light Source: Pulsed Xenon lamp, filtered to approximate D65 daylight
Automatic UV Control:
400 nm cutoff filter for UV control and UV exclusion
Optional 420 nm cutoff filter for UV exclusion
Flashes per Measurement: 1 in LAV mode (4 in. SAV mode)
Measurement Time: < 5 seconds
Transmission Modes: Total (TTRAN) and Regular (RTRAN)
Transmission Compartment: Large and open on 3 sides, 10.2 cm D X 35.6 cm W x 16.5 cm H (4 in. D x 14 in. W x 6.5 in. H)
Standards Conformance
Reflectance: CIE 15:2004, ISO 7724/1, ASTM E1164, DIN 5033, Teil 7 and JIS Z 8722 Condition C
Transmittance: CIE 15:2004, ASTM E1164, DIN 5033 Teil 7 and JIS Z 8722 Condition E, G Haze conformance per ASTM D1003 Section 8. Procedure B Spectrophotometer
Standards Traceability: Instrument standard assignment in accordance with National Institute of Standards and Technology (NIST) following practices described in CIE Publication 44 and ASTM E259