Light module

The invention discloses a light module. A heat insulation plate is arranged in a casing, and the casing is separated into a light emitting cavity and a light receiving cavity by the heat insulation plate. A light emitting device and a first TEC assembly are arranged in the light emitting cavity, and a light receiving device, a second filter, a second TEC assembly and a second TEC base are arrangedin the light receiving cavity. In the light emitting cavity, heat generated by controlling the temperature of the light emitting device is absorbed by the first TEC assembly; and the heat is guided out by the first TEC assembly through a bottom plate of the casing. In the light receiving cavity, the heat generated by controlling the temperature of the second filter is absorbed by the second TEC assembly, is transferred to the side wall of the casing through the second TEC base, and is guided out. Therefore, the light module provided by the invention has the advantage that the heat generated by corresponding light dev