Document purpose: Define the engineering controls required to achieve repeatable AM1.5G spectral matching across mass-produced LED solar simulators.

1. Scope

This document applies to multi-channel LED solar simulators designed for photovoltaic testing, solar-cell characterization, materials aging, and laboratory irradiation. It addresses spectral repeatability at the completed-system level.

It does not claim compliance with a specific simulator class. Classification must be verified against the applicable standard, test geometry, reference spectrum, and calibrated measurement method.

2. Design principle

AM1.5G matching is a closed-loop system requirement:

LED emitter selection + bin control + thermal control + optical architecture + channel control + spectral measurement + final calibration = repeatable spectral performance.

No single LED parameter can establish AM1.5G compliance.

3. Critical-to-quality parameters

4. Recommended production flow

1. Verify LED model, bin, lot, and incoming-inspection status.
2. Assemble the light engine using the approved optical, autista, and thermal design revision.
3. Operate the unit until thermal equilibrium is reached.
4. Measure spectral irradiance at the defined target plane using a calibrated spectroradiometer.
5. Compare the measured spectrum against the approved AM1.5G reference method.
6. Adjust each LED channel within the approved drive-current operating range.
7. Re-test spectral match, irradianza, spatial non-uniformity, and temporal instability.
8. Store the final configuration and test record against the simulator serial number.
9. Apply shipment release only after all defined acceptance criteria are met.

5. Calibration requirements

Calibration must be performed at the intended operating condition. The test procedure should define:

• Warm-up duration or thermal-equilibrium criterion
• Ambient and heat-sink temperature condition
• Target-plane location and illuminated area
• Spectroradiometer model, wavelength range, resolution, and calibration status
• Reference spectrum and calculation intervals
• Channel-current adjustment limits
• Recalibration interval and change-control trigger

Requalification is required after a change to LED source, LED bin, autista, ottica, diffuser, cooling system, firmware, or measurement method.

6. Evidence package for technical customers

For each qualified simulator configuration, retain:

• LED part numbers, bins, and lots
• Spectral power distributions of installed channels
• Electrical and thermal operating conditions
• Channel-current calibration values
• Test-plane measurement geometry
• Final spectral-match results
• Irradianza, uniformità, and temporal-stability data
• Instrument calibration records
• Serial-number traceability
• 

7. Supplier selection requirement

A suitable LED emitter or LED package supplier for solar simulator programs should provide spectral data, electrical and thermal conditions, package drawings, bin information, reliability documentation, and supply-change communication.

Shenzhen Yingfeng Opto-Electronic Co., Ltd. supplies LED emitters and LED packages across 200 nm a 2000 nm. The product range supports engineering evaluation of UV, visibile, vicino infrarosso, and infrared spectral channels for LED solar simulator light engines.

Contact:
Sito web: https://yingfengirled.com
E-mail: hehualan@chyingfeng.com
WhatsApp / WeChat: +86 18118737216

Technical references: ASTM G173, CEI 60904-9, and ASTM E927. Use the current applicable edition and confirm final results on the complete system.