The Keysight angular reflector is typically used in combination with the 10770A angular interferometer and is primarily for the Keysight 5530 Laser Calibration System.
The Keysight 10767A retroreflecor (cube corner) is a measurement reflector for linear measurements. Similar to 10703A, but with metric threads and a stronger housing.
The Keysight 5530 Laser Calibration System offers the highest accuracy available for measuring, calibrating and validating precision machine tool and coordinate-measuring-machine (CMM) equipment.