Abstract

To solve the problem where the actual grating aperture decreases with an increasing scanning angle during the scanning of a three-grating monochromator, we propose an off-axis assembly method for the worm gear turntable that makes it possible to suppress this aperture reduction. We simulated and compared the traditional assembly method with the off-axis assembly method in the three-grating monochromator. Results show that the actual grating aperture can be improved by the off-axis assembly method. In fact, for any one of the three gratings, when the monochromator outputs the longest wavelength in the corresponding wavelength band, the actual grating aperture increases by 45.93%. Over the entire monochromator output band, the actual grating aperture increased by an average of 32.56% and can thus improve the monochromator’s output energy. Improvement of the actual grating aperture can also reduce the stray light intensity in the monochromator and improve its output signal-to-noise ratio.

© 2018 Optical Society of America

Cost-effective plane-grating monochromator design for extreme-ultraviolet application

Luca Poletto and Fabio Frassetto
Appl. Opt. 57(5) 1202-1211 (2018)

A New Plane Grating Monochromator with Off-Axis Paraboloids and Curved Slits

R. A. Hill
Appl. Opt. 8(3) 575-581 (1969)

X-ray monochromator designs based on extreme off-plane grating mountings

W. Werner and H. Visser
Appl. Opt. 20(3) 487-492 (1981)

Cooled infrared off-axis freeform three-mirror system design with convenience in testing and assembly

Deyan Zhu, Yufan Zhang, Zijia Hu, Yixuan Liu, Pan Guo, and Jingqin Su
Appl. Opt. 61(36) 10794-10800 (2022)

New plane grating monochromator with off-axis parabolical mirrors

M. A. Gil and J. M. Simon
Appl. Opt. 22(1) 152-158 (1983)