Relative radiometer photo-thermal receiver with built-in light receiving part and morphology parameter acquisition method

The invention discloses a light receiving part built-in relative radiometer photo-thermal receiver and a morphology parameter acquisition method, and relates to the field of on-orbit optical radiation measurement of remote sensors. The relative radiometer photo-thermal receiver with the built-in light receiving part comprises an outer sensing unit and an inner sensing unit, the end face of the light receiving portion of the inner sensing unit is provided with a blind hole extending towards the hot linking portion, and the bottom face of the blind hole forms an included angle a relative to the center line of the blind hole. The relative radiometer photo-thermal receiver morphology parameter obtaining method is used for obtaining blind hole morphology parameters, and the blind hole morphology parameters comprise an included angle a and a depth-diameter ratio H; the method comprises the following steps: 1, determining an optical radiation absorptivity requirement of a relative radiometer; 2, simulation parameter