Introduction to Goniophotometry and Its Applications

Goniophotometry is a specialized photometric measurement technique used to evaluate the spatial distribution of light emitted by luminaires, LEDs, displays, and other optical devices. A goniofotometro is the instrument designed to perform these measurements by capturing luminous intensity, luminance, and colorimetric data across multiple angular positions. This data is essential for compliance with international lighting standards, quality assurance, and research applications.

IL LISUN LSG-6000 goniophotometer is a state-of-the-art system designed for high-precision measurements in industries such as LED manufacturing, display testing, urban lighting design, and medical lighting. Its advanced automation, compliance with IEC, CIE, and ANSI standards, and robust construction make it a preferred solution for laboratories and production facilities worldwide.

Fundamental Principles of Goniophotometer Operation

A goniophotometer operates by rotating a light source or detector along one or more axes to measure luminous intensity distribution (LID). The two primary configurations are:

1. Tipo C (rivelatore mobile, sorgente luminosa fissa): The detector moves around the stationary luminaire, capturing angular light distribution.
2. Tipo A/B (sorgente luminosa mobile, rivelatore fisso): The luminaire rotates while the detector remains fixed, measuring emitted light at varying angles.

IL LSG-6000 impiega un Type C configuration, ensuring high accuracy with minimal measurement error. Its dual-axis rotation system (horizontal and vertical) allows for full 3D spatial analysis of luminous flux, beam angles, and uniformity.

Key Components and Functionality of the LSG-6000 Goniophotometer

IL LSG-6000 integrates several critical subsystems to ensure precise and repeatable measurements:

• Precision Rotary Stages: High-torque servo motors enable smooth angular positioning with a resolution of 0.01°, minimizing mechanical vibration errors.
• Spectroradiometer/Photometer Module: Measures luminous intensity (cd), chromaticity (CIE 1931/1976), correlated color temperature (CCT), and color rendering index (CRI).
• Darkroom Environment: A light-sealed chamber eliminates ambient interference, ensuring measurement integrity.
• Automated Control Software: Enables programmable test sequences, real-time data logging, and report generation in compliance with IEC 60598, LM-79, and EN 13032-1.

Measurement Parameters and Compliance with International Standards

IL LSG-6000 is engineered to meet stringent industry requirements, including:

Casi d'uso specifici del settore

1. LED & OLED Manufacturing

   • Verifies angular color consistency and luminous efficacy in high-power LEDs.
   • Garantisce la conformità con Energy Star E DLC certification requirements.

2. Display Equipment Testing

   • Measures viewing angle uniformity in OLED and micro-LED screens per IEC 62341.

3. Urban Lighting Design

   • Evaluates streetlight glare and light pollution using CIE 150:2017 guidelines.

4. Medical Lighting Equipment

   • Validates surgical lamp beam homogeneity as per ISO 9680.

5. Photovoltaic Industry

   • Assesses solar simulator angular irradiance distribution (ASTM E927).

Competitive Advantages of the LSG-6000

1. High-Speed Data Acquisition

   • Reduces test cycle time with 10,000-lux measurement capability and rapid spectral sampling.

2. Conformità multi-standard

   • Supporti IEC, ANSI, CIE, and JIS standards, facilitating global market access.

3. Modular Expandability

   • Optional environmental chambers for thermal testing (-40°C to +100°C).

4. Automated Calibration

   • Self-calibration against NIST-traceable reference sources minimizes drift.

Domande frequenti (FAQ)

Q1: What is the measurement uncertainty of the LSG-6000?
A: The system achieves <3% uncertainty for luminous flux and <0.0015 Δu’v’ for chromaticity, per CIE 198:2011 guidelines.

Q2: Can the LSG-6000 measure flicker in LED luminaires?
A: Yes, with an optional high-speed photodiode module, it complies with IEEE 1789-2015 flicker analysis.

Q3: What is the maximum luminaire size supported?
A: The standard configuration accommodates luminaires up to 2,000 mm in diameter; custom setups allow larger fixtures.

Q4: How does the LSG-6000 handle near-field measurements?
A: It integrates a near-field goniophotometry mode with ray-tracing correction for precise intensity mapping at short distances.

Q5: Is the system compatible with third-party software?
A: Yes, it exports data in IES, LDT, and XML formats for integration with Dialux, Relux, and other simulation tools.

This technical exploration underscores the LSG-6000’s role as an indispensable tool for photometric validation, ensuring compliance, innovation, and quality across diverse lighting applications.