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Title: High-Resolution UV Relay Lens for Particle Size Distribution Measurements Using Holography

Abstract

Shock waves passing through a metal sample can produce ejecta particulates at a metal-vacuum interface. Holography records particle size distributions by using a high-power, short-pulse laser to freeze particle motion. The sizes of the ejecta particles are recorded using an in-line Fraunhofer holography technique. Because the holographic plate would be destroyed in an energetic environment, a high-resolution lens has been designed to relay the interference fringes to a safe environment. Particle sizes within a 12-mm-diameter, 5-mm-thick volume are recorded onto holographic film. To achieve resolution down to 0.5 μm, ultraviolet laser (UV) light is needed. The design and assembly of a nine-element lens that achieves >2000 lp/mm resolution and operates at f/0.89 will be described. To set up this lens system, a doublet lens is temporarily attached that enables operation with 532-nm laser light and 1100 lp/mm resolution. Thus, the setup and alignment are performed with green light, but the dynamic recording is done with UV light. During setup, the 532-nm beam provides enough focus shift to accommodate the placement of a resolution target outside the ejecta volume; this resolution target does not interfere with the calibrated wires and pegs surrounding the ejecta volume. A television microscope archives images ofmore » resolution patterns that prove that the calibration wires, interference filter, holographic plate, and relay lenses are in their correct positions. Part of this lens is under vacuum, at the point where the laser illumination passes through a focus. Alignment and tolerancing of this high-resolution lens will be presented, and resolution variation through the 5-mm depth of field will be discussed.« less

Authors:
; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
National Security Technologies, LLC
Sponsoring Org.:
USDOE National Nuclear Security Administration (NA)
OSTI Identifier:
939690
Report Number(s):
DOE/NV/25946-514
Journal ID: 0277-786X
DOE Contract Number:  
DE-AC52-06NA25946
Resource Type:
Conference
Journal Name:
Proceedings SPIE
Additional Journal Information:
Journal Volume: 7060; Conference: SPIE Optics and Photonics Conference; August 10-14, 2008; San Diego, CA
Publisher:
SPIE
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; UV optical relay; holography; submicron optical resolution; ejecta; particle size distribution

Citation Formats

Malone, Robert M., Capelle, Gene A., Frogget, Brent C., Grover, Mike, Kaufman, Morris I., Pazuchanics, Peter, Sorenson, Danny S., Stevens, Gerald D., Tibbits, Aric, and Turley, William D. High-Resolution UV Relay Lens for Particle Size Distribution Measurements Using Holography. United States: N. p., 2008. Web. doi:10.1117/12.793484.
Malone, Robert M., Capelle, Gene A., Frogget, Brent C., Grover, Mike, Kaufman, Morris I., Pazuchanics, Peter, Sorenson, Danny S., Stevens, Gerald D., Tibbits, Aric, & Turley, William D. High-Resolution UV Relay Lens for Particle Size Distribution Measurements Using Holography. United States. https://doi.org/10.1117/12.793484
Malone, Robert M., Capelle, Gene A., Frogget, Brent C., Grover, Mike, Kaufman, Morris I., Pazuchanics, Peter, Sorenson, Danny S., Stevens, Gerald D., Tibbits, Aric, and Turley, William D. Fri . "High-Resolution UV Relay Lens for Particle Size Distribution Measurements Using Holography". United States. https://doi.org/10.1117/12.793484. https://www.osti.gov/servlets/purl/939690.
@article{osti_939690,
title = {High-Resolution UV Relay Lens for Particle Size Distribution Measurements Using Holography},
author = {Malone, Robert M. and Capelle, Gene A. and Frogget, Brent C. and Grover, Mike and Kaufman, Morris I. and Pazuchanics, Peter and Sorenson, Danny S. and Stevens, Gerald D. and Tibbits, Aric and Turley, William D.},
abstractNote = {Shock waves passing through a metal sample can produce ejecta particulates at a metal-vacuum interface. Holography records particle size distributions by using a high-power, short-pulse laser to freeze particle motion. The sizes of the ejecta particles are recorded using an in-line Fraunhofer holography technique. Because the holographic plate would be destroyed in an energetic environment, a high-resolution lens has been designed to relay the interference fringes to a safe environment. Particle sizes within a 12-mm-diameter, 5-mm-thick volume are recorded onto holographic film. To achieve resolution down to 0.5 μm, ultraviolet laser (UV) light is needed. The design and assembly of a nine-element lens that achieves >2000 lp/mm resolution and operates at f/0.89 will be described. To set up this lens system, a doublet lens is temporarily attached that enables operation with 532-nm laser light and 1100 lp/mm resolution. Thus, the setup and alignment are performed with green light, but the dynamic recording is done with UV light. During setup, the 532-nm beam provides enough focus shift to accommodate the placement of a resolution target outside the ejecta volume; this resolution target does not interfere with the calibrated wires and pegs surrounding the ejecta volume. A television microscope archives images of resolution patterns that prove that the calibration wires, interference filter, holographic plate, and relay lenses are in their correct positions. Part of this lens is under vacuum, at the point where the laser illumination passes through a focus. Alignment and tolerancing of this high-resolution lens will be presented, and resolution variation through the 5-mm depth of field will be discussed.},
doi = {10.1117/12.793484},
url = {https://www.osti.gov/biblio/939690}, journal = {Proceedings SPIE},
number = ,
volume = 7060,
place = {United States},
year = {2008},
month = {8}
}

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