Alignment fixture for an optical instrument

Abstract

An alignment fixture for an optical instrument such as an optical correlator providing for the adjustment of the alignment of an element thereof, such as a matched filter or multiple matched filter or a multiple holographic lens, along at least two transverse x and y axes, and also rotationally .theta. in roll about a z axis perpendicular to the transverse x and y axes. The alignment fixture is constructed with a base plate which is designed to be mounted on a stabilized optical bench. The base plate is movable along the z axis for adjustment therealong, and includes a vertically extending frame member. An L-shaped lift angle plate is vertically movably and supported by the vertically extending frame member to provide for alignment adjustments along the y axis. The L-shaped lift angle plate movably mounts a rotational stage in a manner which provides for alignment adjustments along the horizontal x axis. The element being aligned, such as a matched filter, is mounted on the rotational stage with an angular adjustment being provided for .theta. roll angular adjustments. Each adjustment is provided by a micrometer drive, preferably a pulse driven motor micrometer controlled by a computer.