The invention relates to a device and method for testing the multi-
wavelength refractive index of a lens, and the device comprises a tested lens, and the device comprises a
light source assembly, a
signal detection module, a moving reflector moving back and forth at a
constant speed, and a diopter measurement module. According to the lens multi-
wavelength refractive index testing device, related parameters for calculating the
refractive index are obtained by detecting interference signals, a
prism does not need to be manufactured, detection of related angles of the
prism is not needed, operation is more convenient, the testing period is shortened,
rapid testing can be achieved, and the lens multi-
wavelength refractive index testing device is suitable for detection of finished lenses; moreover, by arranging the second
light source assemblies with various wavelengths and the corresponding first photoelectric detection assemblies, and combining the third
light source assembly with superradiation
luminescence and the second photoelectric detection
assembly, the device can adapt to tested lenses with various thicknesses, and even if the tested lenses are too thick or too thin, the accuracy of test parameters can be ensured, and test errors can be reduced.