A fully closed iris device

Abstract

The invention provides a fully closed iris diaphragm device to solve the problems in the prior art that the aperture adjustment range of the iris diaphragm is small and the diaphragm cannot be completely closed. The device includes an installation housing fixedly installed on the aperture base, a ball bearing located in the installation housing, an aperture adjusting ring gear, an annular driving turntable, and at least three aperture blades. The diaphragm blades are stacked on the installation housing in turn, the swing end of the upper diaphragm blade overlaps the fixed end of the lower diaphragm blade to form a ring structure, and the fixed end of the uppermost diaphragm blade in the ring structure is far away from the installation housing One side is hinged with the inner ring of the ball bearing through a fixed pin, and the fixed end of the other diaphragm blades is hinged with the installation housing through a fixed pin at the side close to the installation housing; The guide column is provided with a guide groove suitable for each guide column on the ring-shaped driving turntable, and the guide column extends into the guide groove.

Description

technical field [0001] The invention relates to an aerial optical imaging device, in particular to a fully closed variable aperture device. Background technique [0002] With the wide application of aerial cameras in the field of remote sensing imaging, the camera is required to be able to adapt to the imaging requirements of low-light environment to high-light environment, which makes the camera system must have high dynamic imaging capability. High dynamic imaging capabilities are guaranteed by optical lenses with high dynamic adjustment capabilities and high-sensitivity imaging components. However, in strong bright light environments, the imaging energy acquired by high-sensitivity imaging components will cause severe overexposure of the image and affect the imaging quality. Through Shortening the exposure time of the imaging chip can reduce overexposure. Due to the limitation of the shortest exposure time of the imaging chip, it is necessary to adjust the aperture to a v...

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