Research on Focal Length Measurement Scheme of Self-Collimating Optical Instrument Based on Double Grating

In this paper, we propose a scheme for measuring the focal length of a collimating optical instrument. First, a mathematical model for measuring the focal length of a collimator with double gratings is derived based on the moiré fringe formula and the principles of geometric optics. Mathematical sim...

Full description

Bibliographic Details

Published in:	Sensors
Main Authors:	Wenchang Yang, Zhiqian Wang, Chengwu Shen, Yusheng Liu, Shaojin Liu, Qinwen Li, Wen Du, Zhuoda Song
Format:	Article
Language:	English
Published:	MDPI AG 2020-05-01
Subjects:	focal length measurement moiré fringe self-collimating optical system mathematical model double grating
Online Access:	https://www.mdpi.com/1424-8220/20/9/2718