Check the listing for details. NEW CORNER CUBE TRIHEDRAL PRISM retroreflector laser rangefinder target. Condition: New. Listed at 49.00 USD. CORNER CUBE TRIHEDRAL PRISM New, high quality corner cube (trihedral) prism made by Pyramid Optical Corp. in the USA.Also called a retroreflector, this prism will reflect light back to its origin regardless of the orientation of the prism face. Commonly used in surveying equipment and as a cooperative target for laser rangefinders.Dimensions are 2.6″ diameter x 1.6″ deep with a blacked backside.CORNER CUBE TRIHEDRAL PRISM New, high quality corner cube (trihedral) prism made by Pyramid Optical Corp. in the USA.Also called a retroreflector, this prism will reflect light back to its origin regardless of the orientation of the prism face. Commonly used in surveying equipment and as a cooperative target for laser rangefinders.Dimensions are 2.6″ diameter x 1.6″ deep with a blacked backside.