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High efficiency laser-sustained plasma light source

專利號
US10887974B2
公開日期
2021-01-05
申請人
KLA-Tencor Corporation(US CA Milpitas)
發(fā)明人
Matthew Derstine; Ilya Bezel; Anatoly Shchemelinin; Eugene Shifrin
IPC分類
H05G2/00; H05H1/24
技術(shù)領(lǐng)域
plasma,reflector,pump,in,assembly,or,gas,optical,pass,broadband
地域: CA CA Milpitas

摘要

A system for generating laser sustained broadband light includes a pump source configured to generate a pumping beam, a gas containment structure for containing a gas and a multi-pass optical assembly. The multi-pass optical assembly includes one or more optical elements configured to perform a plurality of passes of the pumping beam through a portion of the gas to sustain a broadband-light-emitting plasma. The one or more optical elements are arranged to collect an unabsorbed portion of the pumping beam transmitted through the plasma and direct the collected unabsorbed portion of the pumping beam back into the portion of the gas.

說明書

In another embodiment, as shown in FIG. 1Q, the adaptive optical element may include an adaptive retro-reflector 130 (e.g., adaptive spherical mirror). In this regard, the adaptive retro-reflector 130 may serve to reflect pump illumination back into the plasma 106, while also acting to correction aberrations measured by the one or more wave-front sensors 128.

In another embodiment, although not shown, the system 100 may include one or controllers communicatively coupled to the one or more wave-front sensors 128 and the one or more adaptive optical elements 118 and/or 130. In this regard, the one or more controllers may receive the wave-front data from the one or more wave-front sensors 128 and analyze the data for aberrations. In turn, the controller may send one or more control signals to the one or more adaptive optics to direct the one or more adaptive optics to compensate for the measured aberration. The controller may include one or more processors and one or more memory for storing program instructions. The program instructions may be pre-programmed to cause the one or more processors to execute the about steps.

權(quán)利要求

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