TEMPERATURE-FOCUSING STRUCTURE AND METHOD FOR LONG-FOCAL-LENGTH CAMERA

A temperature-focusing structure and method for a long-focal-length camera, which aim to overcome the defect in the prior art that existing supporting structures have relatively large sizes, such that temperature control power is relatively large. The temperature-focusing structure for a long-focal-length camera comprises a thermodynamic ring (1), a thermal insulation pad (2), a secondary lens mount outer frame (3) and a primary lens support (4), which are coaxially and sequentially arranged, wherein a temperature control device and a temperature measurement device are arranged on an outer side face of the thermodynamic ring (1) and are used for controlling the temperature of the thermodynamic ring (1); in a radial direction, the thermodynamic ring (1) expands when heated and contracts when cooled to drive the other end of the secondary lens mount outer frame (3) to expand or contract; a secondary lens piece (6) is arranged at the central axis of the end of the secondary lens mount outer frame (3) away from t