Composite thermal diaphragm cooling device for solar telescope

Abstract

The invention discloses a composite thermal diaphragm cooling device for a solar telescope. In a large-aperture solar telescope system, the sunlight cut off by a thermal diaphragm will not only causetemperature rise but also bring a stray light source. The composite thermal diaphragm cooling device comprises a thermal diaphragm base body, a jet impingement plate, a reflecting plate and a thermaldiaphragm plug-in, wherein the thermal diaphragm base body is provided with an optical path channel at the central position; a reflecting surface of the thermal diaphragm base body is provided with adiaphragm placement groove and a jet cavity; the reflecting surface of the thermal diaphragm base body is fixed with a reflecting plate; the inner side surface of the reflecting plate is fixed with the jet impingement plate; the thermal diaphragm base body is internally provided with n liquid inlet flow channels and n liquid outlet flow channels; the thermal diaphragm plug-in is plugged in the diaphragm placement groove of the thermal diaphragm base body; the middle part of the thermal diaphragm plug-in is provided with a light inlet channel; and the edge of the outer side surface of the thermal diaphragm plug-in is flush with the inner contour of the reflecting plate, and the middle part is set in an outward protruding manner. The composite thermal diaphragm cooling device can increase the Reynolds number of a cooling liquid in the liquid inlet flow channels through a gradual-shrinking hole design, and thus enhances the heat exchange performance.

Description

technical field [0001] The invention belongs to the technical field of telescopes, and in particular relates to a compound thermal aperture cooling device for a solar telescope. Background technique [0002] With the continuous improvement of time, space and spectral resolution requirements for the observation of phenomena in the solar active region, in order to obtain higher spatial resolution capabilities, the aperture of solar telescopes continues to increase, and the larger the aperture of the telescope, the better its light-gathering ability. Strong, resulting in serious thermal effects. [0003] The solar radiation heat received by the main reflector of the meter-level solar telescope and focused on the focal plane exceeds kilowatts. With the continuous convergence of the solar beams, the sunlight finally projected on the back-end optical system will reach a higher power density. , eventually causing thermal damage to optical devices and even mechanical structures. ...

AI Technical Summary

Problems solved by technology

However, the device still has poor thermal control effect at the focal point of the reflective panel of the thermal diaphragm, and the temperature gradient of the reflective panel is large. Most of the reflected light and scattered light will enter the light opening of the thermal diaphragm, which will affect the imaging quality of the subsequent optical system.

Images