Beam monitoring assembly

Details Beam monitoring assembly Beam monitoring assembly

1998-10-06

1999-11-23

Kim, Robert H.

Optics: measuring and testing

Photometers

Photoelectric

356 6, 356121, 21912161, 21912162, G05D 2500

Patent

active

059910151

ABSTRACT:
A beam monitoring assembly (10) that provides near-field imaging, far-field imaging and power measurements of a laser beam (12) in real-time for alignment and performance verification purposes. The monitoring assembly (10) includes a holographic beam splitter (24) that splits the laser beam (12) from the laser resonator cavity into a series of separate split beams (28, 30, 32) having varying beam powers. One of the split beams (28) is directed to a power meter (36) to measure the power of the beam (12). One of the split beams (28) is directed to a near-field camera (42) that provides a near-field image of the beam (12). Another one of the split beams (30) is directed to a heat dump (52) that absorbs and removes the beam's energy from the assembly. Another one of the split beams (32) is directed to a far-field lens (46) that focuses the split beam (32) onto a far-field camera (50) that provides a far-field image of the beam (12). The near-field and far-field images of the beam (12) are displayed on an operator control panel in real time. Suitable computer electronics (38) and camera electronics (58) are provided to process the electrical signals from the power meter (36) and the cameras (42, 50).

REFERENCES:
patent: 5408318 (1995-04-01), Slater
patent: 5872626 (1999-02-01), Lipscomb

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