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InstrumentSpectroradiometer SR-UL2
Dispersing elementDiffraction grating
PhotodetectorElectronically cooled linear CCD
Measurement angle2°/ 1°/ 0,2°/ 0.1°motor drive
Measurement distance350mm to ∞ (distance from metallic tip of objective lens)
Minimum measurement areaMeasurement angle 2° φ10
Measurement angle 1° φ4,99
Measurement angle 0,2° φ1,00
Measurement angle 0,1° φ0,5
Wavelength range380 - 780nm
Spectral bandwidth5 - 8nm (Half bandwidth)
Wavelength resolution1nm
Measurement modeAuto/Manual(Integral time/Frequency) / External vertical sync signal input
Measurement objectSpectral radiance Le: W・sr-1・m-2・nm-1
Calculation functionRadiance, Luminance, CIE1931 chromaticity coordinates xy
CIE1976 chromaticity coordinates u' v' Tristimulus value XYZ,
Correlated color temperature and Deviation,
CIE standard observer 2°/10°
Accuracy in luminance±2% or less (For standard illminant A)
Accuracy in chromaticity(x,y) : ±0,002 (For standard illuminant A)
Repeatability in luminance*11,5%(0,0005 - 0,005cd/m²)
0,4%(0,005 - 0,1cd/m²)
0,3%(0,1cd/m² or more )
Repeatability in chromaticity*20,005(0,0005 - 0,005cd/m²)
0,0015(0,005 - 0,1cd/m²)
0,0005(0,1cd/m² or more )

Range of guaranteed luminance
accuracy (for standard illuminant A)*3

2°:0,0005 - 3.000cd/m²
1°:0,0015 - 9.000cd/m²
0,2°:0,0375 - 70.000cd/m²
0,1°:0,15 - 300.000cd/m²
Polarization errorLuminance: 1% or less,
Spectral radiance: 2% or less (400 - 700 nm)
Measurement timeAbout 1 - 248 sec :Normal speed mode
About 1 - 17 sec :High speed mode
InterfaceUSB2.0/RS-232C selectable
Power supplyDedicated AC adapter AC100V-240V, 50/60Hz, DC12V 36W
Operating conditionTemperature 5-30℃, Humidity:80% R.H. or less (no condensation)
External dimensionsApprox 406mm x 150mm x 239mm (LxWxD)
WeightApprox 5.5Kg (main unit only)

*¹ 2σ from 10 times continuous measurement at measuring angle 2°in normal speed mode.
*² Max value - Min value from 10 times continuous measurement at measuring angle 2°in normal speed mode.
*³ Measurable range in Normal and High speed mode.

Measurement area (Diameter φ)

Measurement distance (mm)
350500100020005000
10.0015.1032.2066.40169.00
4.997.5516.1033.2084.40
0.2°1.001.513.226.6416.90
0.1°0.500.761.613.328.44

*The measurement distance is the distance from the tip of the metal fixture on the instrument of the objective lens.

Spektroradiometer