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Abstract

An optical structure routes radiation from an optical input to an optical output, the radiation being successively reflected by orthogonal first, second and third reflective surfaces of a linearly movable section, and departing the section in a departure direction substantially opposite its arrival direction. The section can move approximately parallel to the arrival direction with respect to at least one of the optical input and optical output. A different aspect involves: routing radiation from an optical input to an optical output, including reflecting this radiation successively from orthogonal first, second and third reflective surfaces of a section of the structure, the radiation departing the section in a departure direction substantially opposite its arrival direction; and supporting the section for approximately linear movement approximately parallel to the arrival direction with respect to at least one of the optical input and optical output.

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First Claim