Optical device for producing a minute light beam

Details Optical device for producing a minute light beam Optical device for producing a minute light beam

1974-06-26

1976-03-30

Corbin, John K.

Electric heating

Microwave heating

Tunnel furnace

219121L, 350190, 350191, 350200, 350206, G02B 1318, G02B 1708

Patent

active

039470938

ABSTRACT:
An optical device for producing a minute beam comprises beam forming means such as laser generator or the like, annular beam forming means such as lens or annular aperture mask for forming the beam from the beam forming means into a beam of annular cross section, and a condenser lens for condensing the annular beam from the annular beam forming means.

REFERENCES:
patent: 1988946 (1935-01-01), Hauser et al.
patent: 3419321 (1968-12-01), Barber et al.
patent: 3547526 (1970-12-01), Devereux
patent: 3632955 (1972-01-01), Cruickshank et al.
patent: 3826561 (1974-07-01), Gregg

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