A prism apparatus, comprising a prism assembly , and a support frame connected to the prism assembly , wherein, the support frame comprises a first end and a second end oppositely arranged, and the second end of the support frame is connected to the prism assembly , the first end of the support frame is used to provide a support point for the support frame , and the second end of the support frame is movable relative to the first end of the support frame to adjust a spatial position of the prism assembly relative to the support point; wherein the support frame comprises, a rod body , having an adjustable height; wherein the rod body comprises at least two link rods connected in sequence, and the two link rods adjacently arranged are connected by a mechanical shaft with self-damping; wherein, a spatial position of the prism assembly relative to the support point is adapted for being coarsely adjusted by rotating one of the link rods around the mechanical shaft arranged between the two link rods ; an angle adjustment structure , connected between the rod body and the prism assembly , and having at least one end rotatably connected to the rod body and/or the prism assembly to adjust a relative angle between the prism assembly and the rod body ; characterized in that the angle adjustment structure comprises, a ball link rod , having one end movably connected to the rod body , and the other end with a link rod ball embedded in the prism assembly ; wherein, the prism assembly is rotatably connected to the link rod ball with self-damping around a spherical surface of the link rod ball ; wherein, the angle adjustment mechanism is used to adjust a pitch orientation angle of the prism assembly in a vertical direction and a skew angle of the prism assembly in a horizontal direction relative to the rod body. a prism assembly , and a support frame connected to the prism assembly , wherein, the support frame comprises a first end and a second end oppositely arranged, and the second end of the support frame is connected to the prism assembly , the first end of the support frame is used to provide a support point for the support frame , and the second end of the support frame is movable relative to the first end of the support frame to adjust a spatial position of the prism assembly relative to the support point; a rod body , having an adjustable height; wherein the rod body comprises at least two link rods connected in sequence, and the two link rods adjacently arranged are connected by a mechanical shaft with self-damping; wherein, a spatial position of the prism assembly relative to the support point is adapted for being coarsely adjusted by rotating one of the link rods around the mechanical shaft arranged between the two link rods ; an angle adjustment structure , connected between the rod body and the prism assembly , and having at least one end rotatably connected to the rod body and/or the prism assembly to adjust a relative angle between the prism assembly and the rod body ; characterized in that the angle adjustment structure comprises, a ball link rod , having one end movably connected to the rod body , and the other end with a link rod ball embedded in the prism assembly ; wherein, the prism assembly is rotatably connected to the link rod ball with self-damping around a spherical surface of the link rod ball ; wherein, the angle adjustment mechanism is used to adjust a pitch orientation angle of the prism assembly in a vertical direction and a skew angle of the prism assembly in a horizontal direction relative to the rod body. <EOS>