Design of an infrared monochromatic system with an AOTF as the dispersion element

Author

Wan, Feng ; Fan, Shifu

Author_Institution

Coll. of Precision Instrument & Opt. Eng.,, Tianjin Univ.

Volume

53

Issue

5

fYear

2006

fDate

5/1/2006 12:00:00 AM

Firstpage

871

Lastpage

875

Abstract

In this paper, a method on how to design an infrared monochromatic system based on an acousto-optic tunable filter (AOTF) is introduced. Some key problems about optical system (including collimation of incident light beam and working distance - the shortest distance to separate the zero order light and the diffracted light) are re-searched and solved. The driving circuit for an AOTF based on direct digital synthesis and a digital signal processor is also introduced. The experimental results show a direct proportional relationship between the wave number of diffracted light and the driving frequency. The monochromatic system has a wave number range of 2000-4000 cm^-1a nd the spectral half-width is 20 cm-1

Keywords

acousto-optical filters; monochromators; optical design techniques; 2000 to 4000 cm^-1; AOTF; acousto-optic tunable filter; digital signal processor; direct digital synthesis; dispersion element; infrared monochromatic system design; Acoustic diffraction; Acoustic transducers; Apertures; Frequency; Infrared detectors; Optical diffraction; Optical filters; Optical variables control; Phonons; Tunable circuits and devices;

fLanguage

English

Journal_Title

Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on

Publisher

ieee

ISSN

0885-3010

Type

jour

DOI

10.1109/TUFFC.2006.1632678

Filename

1632678