Electron-beam tunable interference filter spatial light modulator with 10 μs switch time

A. C. Walker, S. D. Smith, R. A. Wilson, R. J. Campbell, J. G H Mathew

Research output: Contribution to journalArticle

Abstract

The electron beam tunable interference filter spatial light modulator (ETIF-SLM), which combines the established technologies of the cathode ray tube with nonlinear interference filters (NLIF), could find applications in cross-bar and other array switching configurations. In this work the NLIF is a ZnSe/ThF4 multilayer thin film structure based on the BEAT device geometry, i.e., with an external absorbing layer. The high thermo-optic coefficient of the ZnSe spacer (dn/dT = 2×10-4K-1) allows the passband of the interference filter to be shifted by the temperature changes induced by the power absorbed from either the optical input or the e-beam. The general concept of this device has been demonstrated previously using a low voltage vidicon tube with large e-beam spot size (500 µm diameter). The author describe the use of a miniature CRT with 25-60 µm spot size, to make an ETIF-SLM with a factor of > 100 faster response and 10 times better spatial resolution.

Original languageEnglish
Pages (from-to)399-401
Number of pages3
JournalProceedings of SPIE - the International Society for Optical Engineering
Volume1359
Publication statusPublished - 1990
Event1990 International Topical Meeting on Optical Computing - Kobe, Jpn
Duration: 8 Apr 199012 Apr 1990

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light modulators
switches
electron beams
interference
filters
cathode ray tubes
low voltage
spacers
spatial resolution
optics
tubes
coefficients
thin films
geometry
configurations
temperature

Cite this

Walker, A. C., Smith, S. D., Wilson, R. A., Campbell, R. J., & Mathew, J. G. H. (1990). Electron-beam tunable interference filter spatial light modulator with 10 μs switch time. Proceedings of SPIE - the International Society for Optical Engineering, 1359, 399-401.
Walker, A. C. ; Smith, S. D. ; Wilson, R. A. ; Campbell, R. J. ; Mathew, J. G H. / Electron-beam tunable interference filter spatial light modulator with 10 μs switch time. In: Proceedings of SPIE - the International Society for Optical Engineering. 1990 ; Vol. 1359. pp. 399-401.
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Electron-beam tunable interference filter spatial light modulator with 10 μs switch time. / Walker, A. C.; Smith, S. D.; Wilson, R. A.; Campbell, R. J.; Mathew, J. G H.

In: Proceedings of SPIE - the International Society for Optical Engineering, Vol. 1359, 1990, p. 399-401.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Electron-beam tunable interference filter spatial light modulator with 10 μs switch time

AU - Walker, A. C.

AU - Smith, S. D.

AU - Wilson, R. A.

AU - Campbell, R. J.

AU - Mathew, J. G H

PY - 1990

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AB - The electron beam tunable interference filter spatial light modulator (ETIF-SLM), which combines the established technologies of the cathode ray tube with nonlinear interference filters (NLIF), could find applications in cross-bar and other array switching configurations. In this work the NLIF is a ZnSe/ThF4 multilayer thin film structure based on the BEAT device geometry, i.e., with an external absorbing layer. The high thermo-optic coefficient of the ZnSe spacer (dn/dT = 2×10-4K-1) allows the passband of the interference filter to be shifted by the temperature changes induced by the power absorbed from either the optical input or the e-beam. The general concept of this device has been demonstrated previously using a low voltage vidicon tube with large e-beam spot size (500 µm diameter). The author describe the use of a miniature CRT with 25-60 µm spot size, to make an ETIF-SLM with a factor of > 100 faster response and 10 times better spatial resolution.

M3 - Article

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JO - Proceedings of SPIE - the International Society for Optical Engineering

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SN - 1996-756X

ER -