Mounted hollow retroreflector mirrors can make the incident light beam return parallel without being affected by whether the incident angle is precisely perpendicular. By accurately combining three of these mirrors at a 90 degree angle, it is possible to avoid the effects of wavelength dispersion or glass absorption caused by the refractive index of the glass. The hollow retroreflector made of mounted hollow retroreflector mirrors has a sturdy structure and is insensitive to vibration, position, and movement, making it very suitable for Michelson interferometers, FTIR spectrometers, and laser tracking systems. Due to the fact that the retroreflection of light is achieved through reflection rather than refraction, the mounted hollow retroreflector mirrors do not introduce dispersion and are suitable for wideband light sources. The structure does not contain optical glue or other materials that are easily affected by temperature and chemical substances, and it has good high temperature resistance and chemical stability.