Mr. Peter K. Trost Profile

Peter K. Trost

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Publications (6)

Proceedings Article | 13 July 2004 Paper

Mapping retinal thickness and macular edema by high-speed three-dimensional optical coherence tomography

Qienyuan Zhou, Peter Trost, Pak-Wai Lo, Christoph Hitzenberger

Proc. SPIE. 5314, Ophthalmic Technologies XIV

KEYWORDS: Image visualization, Eye, Visualization, Optical coherence tomography, Retina, Image resolution, 3D metrology, Image filtering, Retinal scanning, 3D image processing

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Proceedings Article | 1 July 2004 Paper

Three-dimensional optical coherence tomography of the human retina in vivo by high-speed transversal scanning

Christoph Hitzenberger, Peter Trost, Pak-Wai Lo, Qienyuan Zhou

Proc. SPIE. 5316, Coherence Domain Optical Methods and Optical Coherence Tomography in Biomedicine VIII

KEYWORDS: Nerve, Optical coherence tomography, Retina, Image resolution, Head, Optic nerve, In vivo imaging, 3D scanning, Prototyping, 3D image processing

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Proceedings Article | 14 July 2003 Paper

Detection of glaucomatous retinal nerve fiber layer damage by scanning laser polarimetry with variable corneal compensation

Qienyuan Zhou, Jerry Reed, Ryan Betts, Peter Trost, Pak-Wai Lo, Charles Wallace, Richard Bienias, Guoqiang Li, Ross Winnick, William Papworth, Michael Sinai

Proc. SPIE. 4951, Ophthalmic Technologies XIII

KEYWORDS: Eye, Birefringence, Nerve, Visualization, Databases, Polarimetry, Fiber lasers, Neural networks, Macula, Voltage controlled current source

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Proceedings Article | 16 June 1995 Paper

HiRes camera and lidar ranging system for the Clementine mission

Arno Ledebuhr, Joseph Kordas, Isabella Lewis, Michael Richardson, George Cameron, W. Travis White, Douglas Dobie, Wesley Strubhar, Thomas Tassinari, Douglas Sawyer, Michael Shannon, Lyn Pleasance, Albert Lieber, Peter Trost, David Doll, Michael Grote

Proc. SPIE. 2472, Applied Laser Radar Technology II

KEYWORDS: Telescopes, Optical filters, Electronics, Imaging systems, Cameras, LIDAR, Sensors, Receivers, Space telescopes, Image intensifiers

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Lawrence Livermore National Laboratory developed a space-qualified high resolution (HiRes) imaging LIDAR (light detection and ranging) system for use on the DoD Clementine mission. The Clementine mission provided more than 1.7 million images of the moon, earth, and stars, including the first ever complete systematic surface mapping of the moon from the ultra-violet to near-infrared spectral regions. This article describes the Clementine HiRes/LIDAR system, discusses design goals and preliminary estimates of on-orbit performance, and summarizes lessons learned in building and using the sensor. The LIDAR receiver system consists of a HiRes imaging channel which incorporates an intensified multi-spectral visible camera combined with a laser ranging channel which uses an avalanche photo-diode for laser pulse detection and timing. The receiver was bore sighted to a lightweight McDonnell-Douglas diode-pumped Nd:YAG laser transmitter that emitted 1.06 micrometer wavelength pulses of 200 mJ/pulse and 10 ns pulse-width. The LIDAR receiver uses a common F/9.5 Cassegrain telescope assembly. The optical path of the telescope is split using a color-separating beamsplitter. The imaging channel incorporates a filter wheel assembly which spectrally selects the light which is imaged onto a custom 12 mm gated image intensifier fiber-optically coupled into a 384 multiplied by 276 pixel frame transfer CCD FPA. The image intensifier was spectrally sensitive over the 0.4 to 0.8 micrometer wavelength region. The six-position filter wheel contained 4 narrow spectral filters, one broadband and one blocking filter. At periselene (400 km) the HiRes/LIDAR imaged a 2.8 km swath width at 20-meter resolution. The LIDAR function detected differential signal return with a 40-meter range accuracy, with a maximum range capability of 640 km, limited by the bit counter in the range return counting clock. The imagery from the HiRes is most useful for smaller scale topography studies, while the LIDAR data is used for global terrain and inferred gravity maps.

Proceedings Article | 15 November 1993 Paper

Performance characteristics of a 12-mm-active-diameter image tube

C. Bruce Johnson, Norm Wodecki, Albert Lieber, Peter Trost, David Doll

Proc. SPIE. 1952, Surveillance Technologies and Imaging Components

KEYWORDS: Transmitters, Fiber optics, Imaging systems, Cameras, LIDAR, Microchannel plates, Image resolution, Receivers, Power supplies, Image sensors

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