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IR Spectrometers

IR Spectrometers

There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...

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Fabrication of High Contrast Gratings for the Spectrum Splitting Dispersive Element in a Concentrated Photovoltaic System

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Simulation and Reproduction of Direct Solar Radiation Utilizing Grating Anomalous Dispersion.

Junjie Yang¹, Jian Zhang^1,2,3, Bin Zhao¹

¹School of Optoelectronic Engineering, Changchun University of Science and Technology, Changchun 130022, China.

Sensors (Basel, Switzerland)

|December 31, 2025

Summary

This summary is machine-generated.

This study introduces a novel direct solar radiation simulation method, achieving a 31.7' solar angular diameter with constant irradiance. This breakthrough overcomes limitations in current solar simulator technology for advanced applications.

Keywords:

beam reconstruction direct solar radiation simulation grating anomalous dispersion solar angular diameter simulation solar simulator spectral shape reconstruction

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Area of Science:

Optical Engineering
Renewable Energy Simulation
Radiometry

Background:

Traditional solar simulators struggle to balance radiant illuminance and angular diameter.
Existing technologies cannot achieve a solar constant irradiance with a sub-32' angular diameter.

Purpose of the Study:

To propose and validate a new direct solar radiation simulation method.
To overcome the technical challenges in achieving high-fidelity solar simulation.

Main Methods:

Utilized grating anomalous dispersion for direct solar radiation simulation.
Developed a new architecture with a spectrally modulated optical engine, diffractive combining system, and multi-aperture imaging reconstruction.
Verified performance through simulation of the optical system.

Main Results:

Achieved a solar direct radiation simulator with a 31.7' angular diameter and irradiance above a solar constant.
Demonstrated A+ grade spectral match to AM0G and AM1.5G solar spectra with high uniformity.
The system is the first to achieve a solar constant with an angular diameter less than 32'.

Conclusions:

The proposed method revolutionizes traditional solar simulator design and principles.
This technology addresses deficiencies in current solar simulation capabilities.
Significant advancements in the theoretical system and practical application of solar direct radiation simulation.