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Updated: May 19, 2026

Fabrication of High Contrast Gratings for the Spectrum Splitting Dispersive Element in a Concentrated Photovoltaic System
Published on: July 18, 2015
[Design of concave grating for ultraviolet-spectrum]
Biao Luo1, Zhi-Yu Wen, Zhong-Quan Wen
1Key Laboratory of Optoelectronic Technology and System of Ministry of Education, Chongqing University, Chongqing 400044, China. luobiaook@sina.com
This study presents a novel flat field concave grating for ultraviolet spectrophotometers, improving spectral utilization and reducing device size. The optimized design achieves a theoretical resolution capacity better than 3 nm for ultraviolet spectroscopy.
Area of Science:
- Optics and Photonics
- Spectroscopy Instrumentation
Context:
- Ultraviolet (UV) spectroscopy relies on low-signal, multi-analysis techniques.
- Existing spectrometers often face limitations in spectral information utilization and physical volume.
Purpose:
- To design a high-efficiency, compact flat field concave grating for UV spectrophotometers.
- To optimize spectral information capture and reduce spectrometer size using advanced optical design.
Summary:
- A flat field concave grating for a UV spectrophotometer was designed using ZEMAX software, optimizing spectral range (190-410 nm) and aberrations.
- Diffraction efficiency was enhanced using holographic optics and PCGrate software, considering fabrication and working conditions.
- The designed grating (20 mm diameter, F/0.21) offers a theoretical resolution capacity better than 3 nm with a 50 micrometer slit source.
Impact:
- Enables more efficient and compact ultraviolet spectrophotometers.
- Advances the capability of UV spectral analysis with improved resolution.
- Provides a practical design paradigm for flat field concave gratings in spectroscopy.
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