Light bead generating apparatus
AssigneeSick AG
InventorsChristoph Anselment, Heinrich Hippenmeyer
Life of this patent
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Abstract
A light bead generating apparatus has a point light source (11) and a variable optical system (12, 13) of variable focal length, by means of which the point light source (11) is imaged via a light deflecting apparatus (24) in an image plane (14). The variable optical system is formed by two circular cylindrical mirrors (12', 13') which are crossed relative to one another, which have variable focal lengths in the direction of their circular cylinder axes (17', 18') and which are adjustable. They are illuminated by the image forming light beam (19, 19') in the direction of the optical axes (15).
Claims21
Light bead generating apparatus, having a point light source and a variable optical system of variable focal length by means of which the point light source is imaged, via a light deflecting device, at an image surface with a magnification scale predetermined by the variable optical system, characterized in that the variable optical system is formed by first and second crossed cylindrical optical systems with variable focal length in the direction of their cylindrical axes which are displaceably connected in the direction of their cylinder axes and are sequentially illuminated by image forming light beams at points where the cylinder axes of the two cylindrical optical systems stand optically perpendicular to one another.
Dependencies are inferred from the claim text.