Design of a variable-line-spacing grating pattern for spectrometers based on a grating Fresnel device.

@article{Li2016DesignOA,
  title={Design of a variable-line-spacing grating pattern for spectrometers based on a grating Fresnel device.},
  author={Xinghui Li and Jinchao Zhang and Qian Zhou and Kai Ni and Jinchao Pang and Rui Tian},
  journal={Optics letters},
  year={2016},
  volume={41 7},
  pages={1470-3}
}
In this Letter, we propose a variable-line-spacing (VLS) grating pattern for a hybrid diffractive device termed a grating Fresnel (G-Fresnel) lens, which is used in spectrometers to improve spectral resolution over a wide spectral range. The VLS grating pattern disperses light of specific wavelengths with a different angle and position such that the aberration caused by the Fresnel surface can be compensated for. In this manner, high resolution can be achieved over a relatively wide spectral… CONTINUE READING

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