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With the rapid development of modern optical detection technology, higher requirements are put forward for optical detection equipment. Whether it is a ground optical measuring instrument or a space detection camera, it is necessary to reduce or avoid the measurement performance degradation caused by the interference of strong light sources such as the sun.It briefly introduces the current application development of the sunshade deployment mechanism, comparatively analyzes some problems of the current application schemes, and proposes a design scheme of the ropes driven sunshade deployment mechanism. The traction of the constant pressure exhaust valve during the first deployment stage can be achieved by rope traction, which can quickly realize the air pressure balance between the target instrument to be sealed and the external environment, and can avoid the air pressure shock caused by the sealing failure in the initial deployment stage of the sunshade deployment mechanism; Rope traction can effectively control the speed of the unlocking process in the second stage of deployment, reducing the shock of the unlocking moment again; In the third stage of deployment, locking of the deployment joint can be achieved by rope traction, and locking backup can be effectively achieved. This kind of ropes driven sunshade deployment mechanism has the advantages of not only controllable deployment process, small shock, but can be used repeatedly without damaging or destroying the original deployment locking mechanism, and is especially suitable for ground measuring equipment and the ground repeated principle verification of space detection instruments.
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