Prism Holder.

A novel device for holding an optical prism in a preselected orientation is described which comprises a base having a substantially flat first surface thereon and first and second upstanding side members attached thereto with the first surface therebetween, the side members defining respective substantially parallel confronting second and third surfaces, each substantially perpendicular to the first surface for mounting an optical prism therebetween, a shoulder of preselected height and width on the first surface adjacent the second surface for supporting the prism in spaced relationship to the first surface, a tapped hole through the second member and substantially perpendicular to the third surface, and a set screw received by the tapped hole for holding the prism in a preselected orientation between the second and third surfaces. The base may include a peripheral flange for mounting the device. Author