The RS-8 is a precision LED-based luminance reference source designed for laboratory verification and calibration of luminance meters, photometers, imaging photometers, and other optical measurement instruments.
The system combines a single LED, constant-current drive electronics, active temperature control, and an integrating sphere with a defined output aperture to provide diffuse illumination and repeatable optical output.
To meet diverse measurement requirements, the RS-8 is available in four color options: red, green, blue, and white. Each unit is configured for the selected color to support application-specific calibration and verification needs.
Designed for laboratory, research, manufacturing, and quality-assurance environments, the RS8 provides a controlled radiance/luminance reference under defined operating and measurement conditions.
Reference luminance values, measurement uncertainty, and traceability documentation are provided according to the selected calibration configuration.
Applications
- Calibration and verification of luminance meters, colorimeters, spectrometers
- Verification of photometers and Imaging photometers
- Laboratory quality assurance and instrument performance checks
- Repeatability and stability studies of optical measurement systems
- R&D involving displays, LEDs, and Optical sensors
- Production – line verification of luminance measurements instruments
Key Features
- Single LED light source of choice color
- Integrating Sphere output for diffuse illumination
- Constant Current driver
- Active temperature stabilization
- Uniform luminance at output port
- Factory characterized reference luminance
- Compact laboratory instrument architecture
- Linear brightness control
- Single power supply to operate 3 light sources
Support Applications
- AR/VR/MR
- Display & Consumer Electronics
- LED & Semiconductor
- Automotive
- Aerospace & Defense
- Medical Devices
- R&D involving displays, LEDs, and Optical Sensors
- Production line luminance inspection
| RS-8 LED Luminance Reference Source | ||||
| Optical Specifications | ||||
| LED Color | Cool White | Blue | Green | Red |
| CCT [K] or Peak Wavelength | 5000K – 6000K | 450 nm | 530 nm | 625 nm |
| CRI Typical | 90 | N/A | N/A | N/A |
| Source Geometry | 30 mm diameter sphere opening port, uniform radiant source | |||
| Optical Geometry | Built-in integrating sphere, 100 mm diameter | |||
| Luminous Uniformity (Spatial) | ≥ 99.5% across the port opening within 26 mm | |||
| Maximum Possible Luminance/Radiance at Port | 2000 nits | 1200 µW/cm2/sr | 500 µW/cm2/sr | 900 µW/cm2/sr |
| Accuracy & Stability Specifications | ||||
| Illumination Accuracy | ± 2% absolute accuracy to NIST standard | |||
| Spectral Accuracy | ± 1 nm peak wavelength for all discrete wavelength offerings | |||
| Temporal Stability (Luminous Flux) | 0.2% / 100 hrs | |||
| 0.5% / 300 hrs | ||||
| Temporal Stability (Color Coordinates) [x,y] | x | 0.0002 / 100 hrs | y | 0.0002 / 100 hrs |
| 0.0005 / 500 hrs | 0.0005 / 500 hrs | |||
| Time for Operational Readiness | < 240 s | |||
| Temperature Stability | Active thermoelectric cooler (TEC) with feedback, temperature control within ±1°C | |||
| Long-Term Drift | Output ≤ 0.2% | |||
| General Specifications | ||||
| Software | GSLED GUI Control Program, or any serial port terminal tool | |||
| Interface Connectors | USB 2.0 Type B and DB9 RS232 serial | |||
| Interface Protocol | Simple ASCII commands | |||
| Supported Operating Systems | Windows using FTDI-compatible COM port drivers | |||
| Electrical Resolution | 16-bit DAC for channel current drivers, 16-bit ADC for internal LED power control | |||
| Input Voltage & Power | 110 to 220 VAC at 50-60 Hz, 40 W maximum | |||
| System Dimensions (H x W x L) | Light Source: 205 mm x 118 mm x 105 mm | |||
| Power Supply: 87 mm x 200 mm x 160 mm | ||||
| System Weight | Light Source: 1.4 kg (3.2 lb) | |||
| Power Supply: 1.0 kg (2.2 lb) | ||||
| Environmental | ||||
| Operating Temperature | 20°C to 30°C | |||
| Ambient Conditions | 15°C to 30°C, max RH 65% | |||
| Storage Temperature | 0°C to 45°C, max RH 65% | |||
| Specifications are subject to change without notice. | ||||


