| Issue |
J. Eur. Opt. Soc.-Rapid Publ.
Volume 14, Number 1, 2018
|
|
|---|---|---|
| Article Number | 8 | |
| Number of page(s) | 7 | |
| DOI | https://doi.org/10.1186/s41476-018-0077-9 | |
| Published online | 12 March 2018 | |
Research
Compact orthogonal-dispersion device using a prism and a transmission grating
1
School of Physics and Optoelectronic Engineering, Xidian University, 710071, Xi’an, China
2
State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences (CAS), 710119, Xi’an, China
Received:
6
January
2018
Accepted:
4
March
2018
Background: Spectroscopy was one of the main applications of gratings. Most spectrometers today are based on reflection grating designs, since high quality transmission grating technologies have only matured over the last several years. Conventional cross-dispersion systems are based on the reflection grating. For traditional direct-vision or constant-dispersion grism, both the prism and grating have the same dispersion direction.
Methods: This paper presents an orthogonal-dispersion device based on a transmission grating attached to a prism. The dispersion directions of the prism and transmission grating are orthogonal. The analytical expressions for the dispersion of this device are derived in detail. The numerical results and ray-tracing simulations by ZEMAX software are shown.
Results: The simulation results show that the spectrum is spread over 5 diffraction orders, m=3 to -1, the non-diffracted order m=0 is straight, and the other orders are curved.
Conclusions: The device will be able to provide a compact, small-sized and broadband orthogonal- dispersion device that is suitable for the medium resolution spectrometer.
Key words: Orthogonal dispersion / Transmission grating / Prism / Spectrometer
© The Author(s) 2018
Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
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