Ultra Low Luminance Spectroradiometer
Reaching down to 0.0005 cd/m2, the Topcon SR-UL2 Spectroradiometer offers a further 2x improvement in low light sensitivity over the SR-UL1R. That means this spectroradiometer competes directly with the leading low light (PMT-based) photometers while providing the increased color accuracy and full spectral measurements available only in a diffraction grating and linear CCD based system.
The SR-UL2 provides increased color accuracy (±0.002 xy) and guaranteed accuracy luminance measurements down to 0.0005 cd/m2. The four standard apertures (2° / 1° / 0.2° / 0.1°) are automatically selectable by the control panel or through the USB / RS-232 remote interfaces (knob is eliminated) and allow you to optimize the measurement spot size (also a function of working distance) and the minimum measureable luminance level (larger apertures can measure lower levels).
With auto-sync measurements (for flickering light sources), programmable integration time, and a normal/fast mode, the SR-UL2 sets a new standard for full-featured, low-light (< 0.1 cd/m2) instruments.
Measure low luminance with accuracy
Luminance, spectral distribution, and CCT measurements
Four apertures available
Luminance, Chromaticity, and Color Temperature measurement of LCDs, CRTs, OLEDs, LEDs, etc
Transmittance of LCD polarizing plates & filters
Luminance and color measurement of various light sources
Step it up
For a wider dynamic range, from ultra-low luminance of 0.0005 cd/m2 up to 5,000,000 cd/m2 consider the Topcon SR-LEDW Spectroradiometer. This ultra-sensitive instrument can measure high luminance while still providing greater sensitivity for measuring very low luminance levels with full spectral analysis.
|Optical System||Objective lens: f=82mm F2.5|
Eyepiece lens: View field 5°, Diopter adjustment range ±5 diopter
|Measurement Distance||350mm – Inf.|
|Luminance Range cd/m2||0.0005 ~ 3,000||0.0015 ~ 9,000||0.0375 ~ 70,000||0.15 ~ 300,000|
|Spectral Range||380 ~ 780 nm range @ 1 nm resolution|
|Luminance Accuracy||±2% (for standard illuminant A)|
|Color Accuracy||±0.002 in 1931 CIE x,y Space|
|Spot Size at 1m||32.2 mm||16.1 mm||3.2 mm||1.6 mm|
|Min. Spot Size at 35cm||10 mm||5 mm||1 mm||0.5 mm|
|Dimensions||Approx 406mm (L) x 150mm (W) x 239mm (H)|
The base unit model number is SR-UL2 and includes:
- Instrument with standard lens
- AC adapter
- Lens cap
- Hard shell carrying case
- USB Cable
- CD containing CS-900A software