TechnoOptis SR-5A Spectroradiometer

High speed HDR measurement

The SR-5A spectroradiometer delivers high-speed HDR luminance and chromaticity measurement from 0.0005 to 500,000,000 cd/m². With selectable 2°/1°/0.2°/0.1° measuring angles, it enables precise evaluation of LED, µLED, OLED, LCD displays, and automotive lighting in both R&D and production environments, supporting accurate optical characterization and high-dynamic-range testing.

Spectroradiometer

Model:

SR-5A

Maker:

TechnoOptis

Download Materials

Catalog DL

Features

￭ High dynamic range measuring(0.0005 – 500,000,000cd/m²)
￭ Reduction of measuement speed. It can measure more speedy using High speed mode.
￭ Significant improvement in usability by adopting a color touch panel.
￭ Pursuit of the best function and compatibility for measurement system installation.
￭ High accuracy measurement of flashing light (Synchronous measurement function / Integral time delay function).
￭ Standard accessory software can control SR-5A and can process measured data with simple operation.

SR-5 Series Specification Comparison

Principal use

￭ Luminance, Chromaticity, Color rendering index and Color temperature for LED Back light, LED lighting.
￭ Luminance and Chromaticity of µLED/Mini LED、OLED、LCD, Tablet, Smart phone display.
￭ Luminance and Chromaticity of head light and interior panel of automobile.
￭ Used as optical characteristic evaluation sensor for system equipment.
￭ Production line(high precision gamma measurement with spectral measuring),R&D(various evaluation such as IVL-measuring).
￭ Used as optical characteristic evaluation sensor for system equipment.).

Specifications

Photo detector	Electronically cooled linear CCD
Dispersion element	Diffraction grating
Optical system	Object lens : f= 82mm F2.5, Eyepiece lens : 5° view field
Measuring angle	2°/1°/0.2°/0.1° Selectable (Electric motor moved)
Measuring distance	250mm – ∞ (Distance from metallic tip of objective lens)
Spectral band width	5nm (Half bandwidth)
Spectral accuracy	±0.3nm *Hg emission lamp
Wavelength range	380 – 780nm
Wavelength resolution	1nm
Measurement mode	Auto/Manual(Integral time/Frequency) External vertical sync signal input
Measuring object	Spectral radiance : W･sr^-1･m^-2･nm^-1
Measuring function	Radiance Le : W･sr^-1･m^-2, Luminance Lv : cd･m^-2, CIE1931 chromaticity coordinates xy, CIE1976 chromaticity coordinates u’ v’, Tristimulus value XYZ, Correlated color temperature and Deviation, Dominant wavelength : nm , Peak wavelength : nm CIE standard observer 2°/ 10°
Measuring luminance range^(1)(2)	2°：0.0005 – 1,500,000 cd/m² 1°：0.0005 – 4,500,000 cd/m² 0.2°：0.0125 – 100,000,000 cd/m² 0.1°：　0.05 – 500,000,000 cd/m²
Accuracy : luminance^(*1)	±2% or less
Accuracy : chromaticity：(x,y)^(*1)	x : ±0.0015、y : ±0.001 (1° : 0.0015 cd/m²– 、0.2° : 0.0375 cd/m² – 、0.1° : 0.15 cdm² – )
Repeat accuracy : luminance^(*3)	1.5% ： 0.0005 – 0.005 cd/m² 0.4% ： 0.005 – 0.1 cd/m² 0.3% ： 0.1 cd/m² –
Repeat accuracy : chromaticity^(*4)	0.005 ： 0.0005 – 0.005 cd/m² 0.0015 ： 0.005 – 0.1 cd/m² 0.0005 ： 0.1 cd/m² –
Polarization characteristics	Luminance 1％ or less Spectral radiance 2％ or less (400 – 780nm)
Interface	RS-232C、 USB 3.0
Power supply	Dedicated AC adapter AC100V-240V, 50/60Hz, DC12V
Power Consumption	Approx. 30W
Operating conditions	Temperature: 5 – 30℃, Humidity: 80%RH or less (No condensation)
External dimensions (W×D×H)	422×130×244mm
Weight	Approx : 5.5kg

*1 For standard illuminant A.
*2 Measurable range in Normal and High speed mode.
*3 2σ from 10 times continuous measurement at measuring angle 2° in normal speed mode.
*4 (Max – Min) value from 10 times continuous measurement at measuring angle 2°in normal mode.

Measurement diameter ： mmφ

Measuring angle	Measurement distance [mm]^*
Measuring angle	250	350	500	800	1000	2000
2°	6.5	10.0	15.1	25.4	32.2	66.4
1°	3.25	4.99	7.55	12.7	16.1	33.2
0.2°	0.65	1.00	1.51	2.54	3.22	6.64
0.1°	0.33	0.50	0.76	1.27	1.61	3.32

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

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