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Optimum design of wide angle laser detecting system based on fish eye lens and sinusoidal amplitude grating

Authors
Journal
Optics Communications
0030-4018
Publisher
Elsevier
Publication Date
Volume
310
Identifiers
DOI: 10.1016/j.optcom.2013.07.084
Keywords
  • Laser Warning
  • Fish-Eye Lens
  • Sinusoidal Amplitude Transmission Grating

Abstract

Abstract A wide angle laser detecting system with non-mechanical scanning to determine both laser wavelength and arrival angle is described and assembled. Then the system is tested utilizing both 1319nm continuous-wave and 1064nm pulsed Nd:YAG laser in experiments. The incident laser is imaged to three equal interval spots and both incident angle and wavelength can be determined based on coordinates of the middle spot and interval of two adjacent spots. Half field of view of this system is 80°, and maximum wavelength error is 40nm.When the laser enters in the range of 0–70°, the maximum arrival angle error is about 2°, and the error enlarges to 6° when the arrival angel is 80°.

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