Device for modulating a laser beam

Details Device for modulating a laser beam Device for modulating a laser beam

1988-09-12

1989-12-05

Sikes, William L.

Coherent light generators

Particular beam control device

Modulation

372 9, 372 19, 372 99, 350360, 350363, 250374, 250375, 21912168, 21912169, 2191216, 21912119, 2191212, H01S 310, B05D 2500, B23K 2700

Patent

active

048857513

ABSTRACT:
A laser beam focussed on a moving surface, e.g. of a rolling mill, is modulated by means of a rotating disk with through-orifices. The radial lateral faces of the orifices have, relative to the axis of the laser beam, angles of inclination which are different from each other; this difference in inclination is such that the laser beam deviated by one of the radial lateral faces is then reflected by the opposite radial lateral face towards the zone of the surface which is struck by the laser beam passing, without being deviated, through the orifice. The difference in inclination may be between 15.degree. and 30.degree.. The lateral faces of the through-orifices may be lined with a reflective material.

REFERENCES:
patent: 4329562 (1982-05-01), Crahay et al.
patent: 4462660 (1984-07-01), Crahay
patent: 4628179 (1986-12-01), Crahay
patent: 4703228 (1987-10-01), West
patent: 4736095 (1988-04-01), Shepard et al.
patent: 4751706 (1988-06-01), Rohde et al.
patent: 4783787 (1988-11-01), Doi et al.

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