A laser beam is incident on the aspheric side of a tested lens through a beam waist conversion lens and the beam reflected by the aspheric surface is received by CCD camera.

• 激光管发出的光束经束腰变换透镜入射到被测透镜的非球面表面，由CCD摄像头接收非球面的反射激光光斑，CCD的光敏面位于反射激光光束的束腰位置；