Bibliographic Citation
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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 Date | 1992 Aug 01 |
OSTI Identifier | OSTI ID: 189789 |
Report Number(s) | AD-A--258960/4/XAB; JA--6721 |
Other Number(s) | CNN: Contract F19628-90-C-0002 |
Resource Type | Technical Report |
Resource Relation | PBD: 1 Aug 1992 |
Research Org | Massachusetts Inst. of Tech., Lexington, MA (United States). Lincoln Lab. |
Subject | 42 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 Publication | United States |
Language | English |
Format | 8 p. ; PL: |
System Entry Date | 2001 May 03 |
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