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Title Two-mirror unobscured optical system for reshaping the irradiance distribution of a laser beam. (Reannouncement with new availability information)
Creator/Author Malyak, P.H.
Publication Date1992 Aug 01
OSTI IdentifierOSTI ID: 189789
Report Number(s)AD-A--258960/4/XAB; JA--6721
Other Number(s)CNN: Contract F19628-90-C-0002
Resource TypeTechnical Report
Resource RelationPBD: 1 Aug 1992
Research OrgMassachusetts Inst. of Tech., Lexington, MA (United States). Lincoln Lab.
Subject42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES ; LASER RADIATION; BEAM SHAPING; BEAM EMITTANCE; MIRRORS; DESIGN; OPTICS; OPTICAL SYSTEMS
Description/Abstract The design of a two-mirror optical system for reshaping the irradiance distribution of a laser beam is presented. The second mirror is decentered relative to the first to eliminate the obscuration inherent in an axially symmetric design. A geometric-optics approach is used to derive a set of equations that describe the surface figures of each of the mirrors. (In general, the mirror surfaces are not rotationally symmetric). The special case of a system to convert a Gaussian input beam into a uniform output distribution is considered. The expressions for the surface figures are evaluated numerically for several specific systems to provide illustrative examples. It is observed that in some cases rotationally symmetric aspheres may be used to construct the beam-shaping system.
Country of PublicationUnited States
LanguageEnglish
Format8 p. ; PL:
System Entry Date2001 May 03

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