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公开(公告)号：WO1995011432A1
公开(公告)日：1995-04-27
申请号：PCT/JP1994001766
申请日：1994-10-20
Inventor： KABUSHIKI KAISHA KOMATSU SEISAKUSHO
IPC: G01J09/00
CPC classification number: G03F7/70575 , G01J9/0246
Abstract: This invention aims at obtaining stable reference light by using a low-voltage mercury lamp as a reference light source and 253.7-nm line emitted by a lamp in which at least 49 % specific isotope of mercury is sealed.
Abstract translation: 本发明旨在通过使用低电压汞灯作为参考光源和由其中至少49％的汞的特定同位素被密封的灯发射的253.7nm线获得稳定的参考光。
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公开(公告)号：WO1987002768A1
公开(公告)日：1987-05-07
申请号：PCT/US1986001953
申请日：1986-09-19
Applicant: HUGHES AIRCRAFT COMPANY
Inventor： HUGHES AIRCRAFT COMPANY , ELLERBROEK, Brent, L.
IPC: G01J09/00
CPC classification number: G01J9/00 , G01J2001/448
Abstract: An adaptive laser system (10) incorporates a laser (12) and a novel system and method for determining the slope distribution of a laser beam wavefront. The sensor comprises a ramp filter (16) with a continuous monotonically varying transmittance function and two intensity distribution sensors (18 and 20). Lenses (24, 26 and 28) are provided for focusing and collimating the laser beam as appropriate. A processor (22) calculates the slope distribution from the two intensity distributions obtained by the intensity sensors. The slope calculations can be used to determine commands to predistort the laser beam to approximate a desired flat wavefront at the sensor. The transmittance function of the ramp filter is linear and its spatial width is considerably larger than the expected spreading of the beam due to distorsions in the wavefront. Accordingly, the slope distribution is calculated by pointwise differencing the intensities, normalizing by dividing by the sum of the intensities, and scaling by a factor of one half. Accordingly, a solid state slope sensor which is fast, reliable, economical, and capable of high-resolution evaluations of pulsed as well as continuous wave laser beams is provided.
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