Mr. Christopher L. Westgate Profile

Christopher L. Westgate

at Defence Science and Technology Lab

SPIE Involvement:

Author

Publications (6)

Proceedings Article | 20 September 2020 Presentation

Omnidirectional linear and nonlinear filters based on plasmonic materials

Francesco Lotti, Christopher Westgate, Anastasiia Zaleska, Wayne Dickson, Christopher Burgess, Anatoly Zayats

Proceedings Volume 11537, 115370I (2020) https://doi.org/10.1117/12.2572020

KEYWORDS: Nonlinear filtering, Metamaterials, Plasmonics, Gold, Optical filters, Polarization, Dielectrics, Geometrical optics, Linear filtering, Absorption

Read Abstract +

SPIE Journal Paper | 22 May 2020

Low-cost camera-based continuous-wave laser detection

Sean Tipper, Christopher Burgess, Christopher Westgate

OE, Vol. 59, Issue 05, 057107, (May 2020) https://doi.org/10.1117/12.10.1117/1.OE.59.5.057107

KEYWORDS: Cameras, Prototyping, Continuous wave operation, Line edge roughness, Sensors, RGB color model, Laser applications, Power meters, Optical engineering, Calibration

Read Abstract +

Proceedings Article | 7 October 2019 Paper

NATO SET-249 joint measurement campaign on laser dazzle effects in airborne scenarios

Bernd Eberle, Wesley Kinerk, Michael Koerber, Johan Öhgren, Gunnar Ritt, Cristiane Santos, Bastian Schwarz, Ove Steinvall, Sean Tipper, Marijke Vandewal, Christopher Westgate

Proceedings Volume 11161, 111610C (2019) https://doi.org/10.1117/12.2533744

KEYWORDS: Cameras, Sensors, Laser safety, Laser scattering, Airborne laser technology, Laser sources, Light sources

Read Abstract +

In October 2018, NATO SET-249 performed a common trial at WTD 52, Oberjettenberg, Germany, to study laser dazzle effects in an airborne scenario. The facility is equipped with a cable car and is ideal for slanted path experiments from the base station to the cable car where the sensors were mounted. NATO SET-249’s background is laser threat evaluation and the evaluation of the impact of laser eye dazzle on the visual performance of humans. This work gives an overview on the various measurements performed here: 1. Assessment of dazzle effects originating from light scattering at an aircraft canopy by comparing the images of two cameras: one outside and one inside the canopy. The general findings showed that the canopy, which had been used previously on an aircraft, substantially affected the dazzle pattern in the camera within the canopy as compared to the camera outside. 2. Sensor dazzling: Laser dazzling of complementary metal-oxide-semiconductor (CMOS) cameras in the visible domain and, in addition, laser dazzling of a camera equipped with a fisheye lens, which is commonly present in micro-unmanned aerial vehicles, is demonstrated. The dazzled area in the camera field of view (FoV) grows with increasing laser irradiance, and dazzling is effective at irradiance levels around a few μW/cm². 3. An overview on realistic handheld laser engagement scenarios to test the capabilities of a DSTL-developed Laser Event Recorder (LER) is provided. This technology is able to detect continuous wave (CW) and pulsed lasers, and extract their wavelengths, irradiances, Pulse Repetition Frequency (PRF) and directionality. Applications for this LER include collecting information on aircraft laser exposure events, giving information to assess if engagements are eye safe. 4. Measurements performed on various Fraunhofer IOSB developed sensor systems hardened against laser dazzle: The hardening measure of these systems is based either on the use of spatial light modulators or on the implementation of the principle of complementary wavelength bands. The field trial offered the possibility to generate data of the hardened systems under real life conditions.

Proceedings Article | 1 May 2019 Presentation + Paper

Novel low-cost camera-based continuous wave laser detection

Sean Tipper, Christopher Burgess, Christopher Westgate

Proceedings Volume 11019, 110190B (2019) https://doi.org/10.1117/12.2518230

KEYWORDS: Cameras, Prototyping, Sensors

Read Abstract +

Proceedings Article | 9 October 2018 Presentation + Paper

Modelled and experimental laser-induced sensor damage thresholds to continuous wave infrared sources

Christopher Burgess, Lee Hill, Lindsay Lewins, Christopher Westgate

Proceedings Volume 10797, 107970T (2018) https://doi.org/10.1117/12.2326401

KEYWORDS: Cameras, Laser damage threshold, Sensors, Short wave infrared radiation, Laser induced damage, Continuous wave operation, Near infrared

Read Abstract +

Proceedings Article | 5 October 2017 Presentation + Paper

Experimental validation of a phase screen propagation model for nanosecond laser pulses travelling through turbulent atmospheres

Christopher Burgess, Christopher Westgate

Proceedings Volume 10435, 104350F (2017) https://doi.org/10.1117/12.2280156

KEYWORDS: Atmospheric propagation, Atmospheric modeling, Scintillation, Atmospheric scintillation, Pulsed laser operation, Data modeling, Systems modeling, Turbulence, Modeling, Laser applications

Read Abstract +

Showing 5 of 6 publications

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Keywords/Phrases

Search In:

Publication Years