Photo-thermal receiver capable of improving measurement precision of absolute radiometer and preparation method thereof

The invention discloses a photo-thermal receiver capable of improving the measurement precision of an absolute radiometer and a preparation method thereof, and relates to the field of remote sensor on-orbit optical radiation measurement. The photo-thermal receiver capable of improving the measurement precision of the absolute radiometer comprises a hollow main body and a brim, a connecting surfaceused for installing a thermal link piece is arranged on the end face at one side, relatively closer to the hollow main body, of the brim, and a heat transfer surface is arranged on the outer wall ofone end, provided with an opening, of the hollow main body. The preparation method of the photo-thermal receiver capable of improving the measurement precision of the absolute radiometer comprises thefollowing steps of 1, establishing a three-dimensional model; and 2, machining based on the three-dimensional model. According to the present invention, the characteristics of an existing conical photo-thermal receiver and an