Optical assembly and spectrometer

The embodiment of the utility model provides an optical assembly and a spectrometer. The optical assembly comprises a substrate; a temperature sensor; a light splitting element; driving force generated by the driver drives the light splitting element to rotate through the power transmission mechanism; a first calculation circuit that calculates, on the basis of the temperature detected by the temperature sensor, a shift amount of the first position caused by thermal deformation of the substrate; a second calculation circuit which is connected to the first calculation circuit and calculates a target rotation amount of the spectroscopic element on the basis of the offset amount calculated by the first calculation circuit; the processing circuit is connected with the second calculation circuit and the driver, generates a driving control signal according to the target rotation amount calculated by the second calculation circuit and outputs the driving control signal to the driver, and the driver generates a drivi