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Measuring Instruments
Konica Minolta Spectroradiometer CS-2000A
World’s best for analyzing ultra-low luminance: 1,000,000:1 contrast measurement
October 2, 2008
Konica Minolta Sensing, Inc. (Sakai City, Osaka, Japan; President: Toshihiko Karasaki; hereinafter referred to as "Konica Minolta"), is proud to announce the launch of the Spectroradiometer CS-2000A capable of measuring ultra-low luminance levels of 0.0005 cd/m2 of various light-emitting devices and flat-screen televisions such as LCDs, plasma displays, organic EL displays, LEDs, etc. as well as performing high-accuracy measurements corresponding to scotopic*1 relative luminosity*2.
| Product | Spectroradiometer CS-2000A |
|---|---|
| Start of sales | Planned for Mid November, 2008 |
In 2007 Konica Minolta introduced the CS-2000, a polychromator-type*3 spectroradiometer capable of measuring ultra-low luminance of 0.003 cd/m2. The CS-2000 has been well received in the FPD (flat panel display) industry and was awarded the 13th Advanced Display of the Year 2008 Grand Prize in the Display Testing Equipment Category.
* cd/m2: candela per square meter. cd (candela) is a unit of luminous intensity for light sources, and is derived from the Latin word for "candle".
The new product, CS-2000A, is a high-end spectroradiometer model attaining an additional decimal place of performance in measuring low luminosity to meet further demands from the market. The CS-2000A, the world’s best ultra-low luminosity analyzer, has the capability to ensure accurate measurements as low as 0.0005 cd/m2 and enables contrast measurements of 1,000,000: 1*4, the contrast achieved by the newest display devices. This new product provides highly accurate measurement results essential for developing and manufacturing LEDs, organic EL displays, and various other light-emitting devices. In addition, the CS-2000A provides results for high-definition displays, responding to the ever-increasing demand for gradation with near-life texture.
In addition, the selectable measuring angle feature allows the user to select the optimal measuring angle according to the application. A close-up lens (optional accessory) enables measurements of even smaller areas.
Furthermore, the CS-2000A provides measurements that correspond to the visual characteristics of a human in low luminosities.
The peak of sensitivity for human vision is known to shift from green to blue in a dark environment; however, conventional measurement instruments are unable to accurately measure these conditions. The new product "Data Management Software CS-S10w Professional", included as a standard accessory, enables highly accurate measurements responding to the scotopic*1 relative luminosity*2, expanding the scope of applications from product development and manufacturing sites to various research fields including environmental science, medical science, and psychology.
Product Features
1. Accurate ultra-low luminance measurements as low as 0.0005 cd/m2
By utilizing technology to reduce sensor signal noise, the CS-2000A achieves an additional decimal place of performance compared to previous models. The CS-2000A enables stable measurement in ultra-low luminance regions by providing highly accurate measurements as low as 0.0005cd/m2 at a measurement angle of 1°C. In addition, it maintains less than 5nm half bandwidth* (considered necessary for measuring color) throughout the entire measurement wavelength range, enabling precise color measurements.
- *
- Half bandwidth: An indicator of wavelength resolution.
2. Measurement supporting scotopic vision*1
Standard spectral luminous efficiency* of scotopic vision is included in "Data Management Software CS-S10w Professional" (included as a standard accessory), enabling highly accurate measurements corresponding to scotopic vision.
- *
- Standard spectral luminous efficiency: Relative visual sensitivity*2 determined by the International Commission on Illumination (CIE) and used as a standard
3. High-speed measurement of microscopic areas
The measurement angle switching function of the CS-2000A allows the user to select measurement angles of 0.1°C, 0.2°C, or 1°C according to the application. This enables a standard minimum measuring diameter of Ø0.5mm; furthermore, with the close-up lens (optional accessory), areas as small as Ø0.1mm can be measured. Therefore, the CS-2000A can be used not only for measuring general displays, but also for quick and stable luminosity and chromaticity measurements of ultra-small areas such as on automotive or aircraft instrument panels and for indicators of automotive audio systems.
4. Quality control based on the dominant wavelength
"Data Management Software CS-S10w Professional", included as a standard accessory, enables acceptance judgments* based on the dominant wavelength. The CS-2000A is thus optimal for quality control of LEDs, which are hailed as the next generation in lighting, and various other new lighting devices.
- *
- Acceptance judgment based on dominant wavelength: Judges whether the primary wavelength (dominant wavelength) of the respective color is within the standard range in the chromaticity evaluation of LEDs or other illuminating light sources.
5. Accurate measurement of illuminance
Attaching a diffuser adapter for illuminance measurement (optional accessory) enables the CS-2000A to accurately perform spectroscopic measurements of illuminance and chromaticity of irradiated light.
- *1
- There are two types of photoreceptor cells that govern human visual perception: Cone cells capable of recognizing colors, and rod cells that recognize brightness only. The darker the environment, the more actively the rod cells function. Scotopic vision refers to the state where only the rod cells are functioning. In this state, the peak of sensitivity shifts from green to blue; as a result, blue color is perceived more brightly. The state where cone cells are mainly functioning due to ample lighting is called photopic vision.
- *2
- Indicates the sensitivity to the brightness of light at a certain wavelength relative to the sensitivity to the brightness of light at the wavelength that human eyes are most sensitive to (555nm for photopic vision and 507nm for scotopic vision), which is set as 1.
- *3
- A polychromator is a structure in which light dispersed into its separate wavelengths by a diffraction grating (operating in the same way as a prism) is converged by a converging lens onto specific positions for each wavelength on an array-type light-receiving element (sensor). This structure enables high-speed measurements because all wavelengths of the light are measured simultaneously by multiple sensors.
- *4
- When measured with a peak luminance of 500 cd/m2 at a measurement angle of 1°C
Main Specifications
| Measurement angle | 0.1°C, 0.2°C, 1°C selectable | |
|---|---|---|
| Measurement wavelength range | 380 to 780nm | |
| Wavelength resolution | 0.9nm/pixel | |
| Display wavelength pitch | 1.0nm | |
| Median wavelength precision | ±0.3nm (at 435.8nm, 546.1nm, and 643.8nm) | |
| Half bandwidth | 5nm or less | |
| Luminance measurement range (for Standard Illuminant A) |
0.1°C measurement angle: 0.05 to 500,000 cd/m2 0.2°C measurement angle: 0.0125 to 125,000 cd/m2 1°C measurement angle: 0.0005 to 5,000 cd/m2 |
|
| Accuracy | Luminance | ±2% |
| Chromaticity (1°C measurement angle) | x,y: ±0.002 (0.001 to 0.05 cd/m2) x,y: ±0.0015 (from 0.05 cd/m2) |
|
| Repeatability | Luminance (1°C measurement angle) |
1.5% (0.0005 to 0.001 cd/m2) 0.7% (0.001 to 0.003 cd/m2) 0.25% (0.003 to 0.05 cd/m2) 0.15% (0.05 to 5,000 cd/m2) |
| Chromaticity (1°C measurement angle) | x: 0.003 y: 0.0035 (0.001 to 0.003 cd/m2) x: 0.001 y: 0.0015 (0.003 to 0.1 cd/m2) x: 0.0006 y: 0.0006 (0.1 to 0.2 cd/m2) x: 0.0004 y: 0.0004 (0.2 to 5,000 cd/m2) |
|
| Polarization error | 0.1°C, 0.2°C measurement angle: 3% or less 1°C measurement angle: 2% or less |
|
| Measurement time | Approx. 2 to 243 sec. | |
| Color space mode | Lv x y, Lv u’ v’, Lv TΔuv, XYZ ,spectral waveform, dominant wavelength, excitation purity scotopic luminosity (with CS-S10w Professional) |
|
| Interface | USB 1.1 | |
| Operating temperature/humidity range | 5 to 30°CC; Relative humidity 80% or less with no condensation | |
| Power supply | AC adapter (100 to 240V~, 50/60 Hz) | |
| Dimensions (W × H × D) | 158 × 200 × 300mm (Main unit) Ø70 × 95mm (Lens) |
|
| Weight | 6.2kg (including lens) | |
- Measurement conditions for accuracy/repeatability:
Measurement subject: Standard Illuminant A; Ambient temperature: 23°CC±2°CC; - Relative humidity: 65% or less
Specifications and appearance subject to change without notice.
