CIE 84:1989 Integrating Sphere with BaSO4 Coating

What is the Integrating Sphere? The integrating sphere is a precision optical instrument utilized for comprehensive photometric and colorimetric analysis of light sources and luminaries. This device enables accurate measurement of key parameters including luminous flux (lumen), chromaticity coordinates, correlated color temperature (CCT), dominant wavelength, and peak wavelength.

The IS-*M series represents the traditional integrating sphere design. LISUN has transitioned from this legacy production to advanced A-molding technology, now offering the IS-*MA series A-Molding Lumen Sphere.

A-Molding Lumen Sphere vs. Traditional Optical Sphere Specification

• Coating Material Compliance: Internal sphere coating material is manufactured in accordance with CIE Publication No. 84 (1989) specifications.
• Sphere Wall Coating: Primary coating consists of barium sulfate (BaSO4) with polytetrafluoroethylene (PTFE) available as an optional material. Spectral reflectance ρ(λ) ≥ 0.96 within the 450nm to 800nm range and ρ(λ) ≥ 0.92 within the 380nm to 450nm range.
• Optical Diffusion Performance: High-quality diffuse reflection through multiple internal reflections. Average reflectance ρ ≈ 0.8 with spectral reflectance accuracy ρ(λ) < 1.5%.
• Integrated Test Fixtures: Built-in functional lamp testing jigs accommodate E27 bases, T5/T8/T12 fluorescent tubes, and dedicated holder bases for LED modules and various luminaires. Test samples can be installed in both upward and downward orientations within the sphere.
• Electrical Integration: Pre-installed power cable, terminal block, and auxiliary lamp position (auxiliary lamp optional). Integrated power socket provides convenient connection for lamps under test.
• Sensor Port Configuration: Equipped with two photodetector ports, one optical fiber port, and one temperature sensor access hole.
• A-Molding Technology Advantage: Traditional integrating spheres are constructed from multiple segments. LISUN’s proprietary A-Molding Technology produces a monolithic sphere structure with superior sphericity, resulting in enhanced measurement accuracy and repeatability.
• Alignment System: Integrated cross laser alignment system facilitates precise centering of both calibration standards and test samples within the optical sphere (Note: This feature is excluded from models with diameter ≤ 1 meter).

Cross Laser for Optical Spheres Application

The optical sphere operates in conjunction with a spectroradiometer to perform comprehensive photometric, colorimetric, and radiometric parameter measurements.

• IS-0.3M/IS-0.5M Models: Designed for testing LEDs, LED modules, miniature LED bulbs, and other compact light sources. Luminous flux measurement range: 0.001 to 1,999 lumens.
• IS-1.0MA Model: Suitable for compact fluorescent lamps (CFL) and standard LED bulbs. Luminous flux measurement range: … (truncated)