Device to control the aiming and focusing of laser systems on a

Details Device to control the aiming and focusing of laser systems on a Device to control the aiming and focusing of laser systems on a

1998-01-20

2000-03-21

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

356363, 356121, G11B 709

Patent

active

06040566&

ABSTRACT:
A device to control the aiming and focusing of laser systems on a target comprises at least one reflecting false target (21) positioned and oriented substantially identically to the target (3), a lens (12) for the focusing of the beam on this false target, a separator device (11), a wavefront analyzer (35), a mirror (33) and a semi-reflective plate (32), the beam (1) getting focused, at the end of the system, on the false target (21) after getting reflected on the separator device (11). A part (31) of the beam with the same wavelength as that of the part reflected by the separator device (11) goes through this device and the semi-reflective plate (32) to get directed towards the wavefront analyzer (35). The beam reflected by the false target (21) goes through the separator grating (11) to get reflected on the mirror (33) and the semi-reflective plate (32) to get directed towards the wavefront analyzer (35). The aiming and focusing measurements are carried out by means of this wavefront analyzer (35) through a differential analysis between the two wavefronts. Application especially to power lasers.

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