Introduction to Goniophotometry in Modern Lighting Applications

Goniophotometry is a critical photometric measurement technique used to characterize the spatial distribution of light emitted from luminaires, LEDs, and other optical sources. Precise angular light intensity measurements are essential for compliance with international standards, ensuring product performance, and optimizing lighting designs across industries. The LISUN LSG-6000 Goniophotometer represents a state-of-the-art solution for high-precision luminous intensity distribution testing, offering unparalleled accuracy, automation, and adaptability to diverse testing scenarios.

This article examines the technical specifications, measurement principles, and industry applications of the LSG-6000, emphasizing its compliance with IEC, CIE, EN, LM-79, and ANSI standards, among others. Additionally, we explore its competitive advantages in sectors such as LED manufacturing, display testing, urban lighting design, and medical lighting development.

Technical Specifications of the LSG-6000 Goniophotometer

The LSG-6000 is a fully automated, large-scale goniophotometer designed for high-precision luminous intensity distribution (LID) measurements. Key specifications include:

The system employs a high-sensitivity CCD spectrometer and precision stepper motors to ensure repeatable measurements under controlled laboratory conditions.

Measurement Principles and Compliance with International Standards

The LSG-6000 operates on the far-field goniophotometric method, where a detector measures luminous intensity at varying angular positions while the light source rotates along two perpendicular axes (C-γ system). This method ensures compliance with:

• IEC 60598-1 (Safety and performance of luminaires)
• CIE 121-1996 (Goniophotometry of luminaires)
• ANSI/IES LM-79-19 (Electrical and photometric measurements of SSL products)
• EN 13032-1 (Lighting applications – Photometric data measurement and presentation)

For LED and OLED manufacturers, the system provides IES/LDT file outputs for lighting simulation software, facilitating optical design validation. In photovoltaic testing, the LSG-6000 evaluates solar simulator uniformity per IEC 60904-9.

Industry-Specific Applications

1. LED and OLED Manufacturing

The LSG-6000 verifies angular color uniformity (ACU) and beam consistency in high-power LEDs, ensuring compliance with Energy Star and DLC requirements. Its high-resolution spectral analysis detects color shifts in OLED panels used in display technology.

2. Urban and Architectural Lighting

Municipalities and lighting designers rely on the LSG-6000 to assess glare control and light trespass in streetlights, adhering to CIE 150:2017 (guidelines for outdoor lighting).

3. Medical and Scientific Lighting

The system validates surgical and diagnostic lighting per ISO 15004-2, ensuring uniform illumination without flicker or chromatic aberrations.

4. Stage and Studio Lighting

Entertainment lighting fixtures require precise beam shaping. The LSG-6000 measures far-field intensity distributions to optimize spotlight and floodlight designs.

5. Optical Component Testing

Lens and reflector manufacturers use the LSG-6000 to validate light diffusion profiles and efficiency losses in optical assemblies.

Competitive Advantages of the LSG-6000

1. Automated Multi-Axis Positioning – Reduces human error in angular measurements.
2. High Dynamic Range Detection – Capable of measuring ultra-low to high-intensity light sources.
3. Modular Expandability – Supports additional detectors for UV/IR or flicker analysis.
4. Regulatory Compliance – Pre-configured test sequences for global certification bodies.
5. Data Integration – Direct export to DIALux, Relux, and AGi32 for lighting simulations.

Frequently Asked Questions (FAQ)

Q1: What is the maximum sample size the LSG-6000 can accommodate?
The standard configuration supports luminaires up to 1.5m in diameter and 50kg in weight, though custom solutions are available for larger fixtures.

Q2: How does the LSG-6000 ensure measurement accuracy in high-power LED testing?
The system employs temperature-stabilized detectors and real-time calibration against NIST-traceable standards to minimize drift.

Q3: Can the LSG-6000 measure flicker in LED lighting?
Yes, with an optional flicker analysis module, it evaluates percent flicker and frequency modulation per IEEE 1789-2015.

Q4: Is the system compatible with darkroom testing?
Absolutely. The LSG-6000 operates optimally in controlled darkroom environments to eliminate ambient light interference.

Q5: What file formats does the software support for photometric reports?
Outputs include IES, LDT, EULUMDAT, and CIE XML for seamless integration with lighting design tools.

This technical exploration underscores the LSG-6000’s role as an indispensable tool for precision photometry, bridging R&D, quality control, and regulatory compliance across multiple industries.