G - Physics – 02 – B
Patent
G - Physics
02
B
G02B 27/14 (2006.01) G03F 7/20 (2006.01)
Patent
CA 2336370
A linear array of equal intensity optical beams is transformed into a rectangular array of equal intensity optical beams, while the intensity of each beam is kept nearly constant. The transformation is performed using an optical element in the form of a plate (14) having two principal planar parallel surfaces (16, 22) and which has two coatings (18, 20) on the front surface (16) and a reflective coating on the opposing back surface (22). The front surface (16) is partially coated with a reflective coating (20) and partially coated with an anti-reflective coating (18). The beams are incident upon the front surface, with some of the beams incident on each of the two different coatings on the front surface.
Cette invention concerne la transformation d'un ensemble linéaire composé de faisceaux optiques d'égale intensité en un ensemble rectangulaire de faisceaux optiques d'égale intensité, dont l'intensité individuelle est maintenue à une valeur quasi constante. Pour la transformation, on utilise un élément optique se présentant sous la forme d'une plaque (14) présentant deux surfaces parallèles planes principales (16, 22), avec deux revêtements (18, 20) sur la surface frontale (16) et un revêtement réfléchissant sur la surface arrière opposée (22). La surface frontale est recouverte en partie d'un revêtement réfléchissant (20) et en partie d'un revêtement anti-refléchissant (18). Les faisceaux frappent la surface frontale, certains d'entre eux atteignant les deux revêtements différents de ladite surface frontale.
Etec Systems Inc.
Osler Hoskin & Harcourt Llp
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