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

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

School of Engineering & Physical Sciences

Research output: Contribution to journal › Article › peer-review

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 language	English
Pages (from-to)	399-401
Number of pages	3
Journal	Proceedings of SPIE - the International Society for Optical Engineering
Volume	1359
Publication status	Published - 1990
Event	1990 International Topical Meeting on Optical Computing - Kobe, Jpn Duration: 8 Apr 1990 → 12 Apr 1990

Cite this

@article{f43af579396343ef90b3abf5f22e8723,

title = "Electron-beam tunable interference filter spatial light modulator with 10 μs switch time",

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.",

author = "Walker, {A. C.} and Smith, {S. D.} and Wilson, {R. A.} and Campbell, {R. J.} and Mathew, {J. G H}",

year = "1990",

language = "English",

volume = "1359",

pages = "399--401",

journal = "Proceedings of SPIE - the International Society for Optical Engineering",

publisher = "SPIE",

note = "1990 International Topical Meeting on Optical Computing, OC '90 ; Conference date: 08-04-1990 Through 12-04-1990",

}

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

Y1 - 1990

N2 - 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.

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

VL - 1359

SP - 399

EP - 401

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

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

T2 - 1990 International Topical Meeting on Optical Computing

Y2 - 8 April 1990 through 12 April 1990

ER -

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

Abstract

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