Reflectivity tester for laser exploder

The invention discloses a reflectivity tester for a laser exploder, and relates to measurement for a light window characteristic of the laser exploder. The tester comprises a laser generator, a singlechip system, an optical fiber branching unit, a first photoelectric detector and a second photoelectric detector, wherein the singlechip system is connected with the laser generator, the first photoelectric detector and the second photoelectric detector respectively; and the optical fiber branching unit is connected with the laser generator and the first photoelectric detector. The reflectivity tester can take a test easily and quickly; a tested sample is connected to a test optical cable, and the reflectivity of the tested sample can be measured instantly; the reflectivity tester is high in safety; only one laser narrow pulse is needed for each test, and the energy of the laser narrow pulse is much lower than an ignition threshold value of the exploder; and the reflectivity tester is high in test precision. Only one laser narrow pulse is needed for each test, so that the requirement on the long-time stability of a laser is low; the two detectors are totally the same, so that the common mode interference (temperature drift) resistance is high; and furthermore, a test result is high in repeatability; and main factors which influence the repeatability are determined by the plugging consistency of the exploder and the test optical cable.