Foldable light shield device

Abstract

The invention provides a foldable light shield device, and belongs to the field of spaceflight. Through the folding and compression technology of a light shield, the axial size of camera load is effectively reduced, so the restriction of the length size of a rocket fairing is overcome. By use of an inflatable driving sealing assembly, a light leak problem in an overlapping place of unfolded light shielding wall faces is solved. The device comprises a base, a light shield wall face assembly and the inflatable driving sealing assembly, wherein the base is of a prism structure; the light shielding wall face assembly is arranged on the upper surface edge of the base; and the inflatable driving sealing assembly is arranged on the chamfered edge of the base. Before the light shielding wall face assembly works, multiple shielding wall faces are foldably arranged in a Z-type manner through reversed hinges. During working, the light shielding wall face assembly can become a panel structure through the stress of the reversed hinges. Through the inflatable driving sealing assembly, fixing and sealing of multiple light shielding wall face assemblies can be achieved. According to the invention, the light shield device is formed by the light shielding wall face assembly, and gaps of the overlapping places are sealed through the inflatable driving sealing assembly after the light shielding wall face assembly is unfolded, so an enclosed light shielding cover structure is formed to prevent light leakage and heat dissipation.

Description

technical field [0001] The invention belongs to the field of aerospace, and in particular relates to an expandable shading device. Background technique [0002] Both the space optical telescope and the remote sensing camera need a hood to suppress stray light and control the temperature of the camera. At present, the conventional hood adopts a fixed structure and cannot be folded and compressed. This type of hood is suitable for small-caliber space optical cameras; The size is getting larger and larger, and the traditional fixed sunshade is no longer suitable for the development of large-aperture space optical systems. At the same time, due to the size limitation of the rocket fairing, the large-sized sunshade cannot be placed in the rocket fairing. The hood form of the unfolding function. Contents of the invention [0003] In order to solve the problems existing in the prior art, the present invention provides an expandable sunshade device, which effectively reduces the...

AI Technical Summary

Problems solved by technology

At present, the conventional hood adopts a fixed structure and cannot be folded and compressed. This type of hood is suitable for small-caliber space optical cameras; The size is getting larger and larger, and the traditional fixed sunshade is no longer suitable for the development of large-aperture space optical systems. At the same time, due to the size limitation of the rocket fairing, the large-sized sunshade cannot be placed in the rocket fairing. The hood form of the deployment function

Images