Self-locking type shutter device with high impact resistance

Abstract

The invention relates to a self-locking type shutter device with high impact resistance, which includes an image sensor support, separation blades, acting arms and driving motors, wherein a photosensitive window is arranged at the middle part of the image sensor support; the separation blades are provided with sliding grooves, and can be rotationally mounted on the image sensor support through separation blade shafts, and the separation blades can completely shield the photosensitive window when closed, and are within the range of the image sensor support when opened normally on two sides of the photosensitive window; the acting arms are rotationally mounted on the image sensor support through rotating shafts, and are provided with convex columns which are arranged at one end of each acting arm respectively, pass through the sliding grooves of the separation blades, and can slide along the sliding grooves; the connection lines between the centers of the rotating shafts of the acting arms and the axes of the convex columns are orthogonally intersected with the groove lines of the sliding grooves of the separation blades, or form included angles slight larger than 90 degrees; and the driving motors are mounted on the image sensor support, and are connected with the acting arms for driving the acting arms. The self-locking type shutter device with high impact resistance has the characteristics of self-locking, high impact resistance, high overload resistance and the like in the normally-open state, and capability of realizing non-uniformity correction or exposure control of an image sensor focal plane in the closed state, so that the opening and closing time can be regulated and controlled conveniently according to requirements, the volume is small and the structure is compact.

Description

technical field [0001] The invention relates to a shutter device applied to infrared, visible light or other types of imaging systems, in particular to a self-locking anti-high impact shutter device. Background technique [0002] The infrared system will produce certain non-uniformity when imaging, therefore, in order to ensure normal imaging must be corrected. In engineering practice, the non-uniformity of the current working state is usually eliminated through the operation of "subtracting the background". Specifically, it is realized through a normally open shutter mechanism. Uniform background radiation. At this time, the background program is running to perform the background subtraction operation. After the operation is completed, the shutter is opened to the normally open state. [0003] With the miniaturization of infrared imaging system and the expansion of application range, sometimes it will face high impact and high overload environment, which puts forward stric...

AI Technical Summary

Problems solved by technology

[0004] 1. It cannot be self-locked when it is normally open, and it does not have the ability to resist high impact and high overload. The stability margin provided by the spring and the counterweight is very small, and it cannot be fully tightened when it is normally open. It is easy to be destroyed, and even cause irreversible damage to the structure;

[0005] 2. The rotation axis of the motor is not at the center of mass of the baffle. In order to ensure that the baffle can be stabilized in the normally open state during imaging, a counterweight must be added to the far end of the baffle, and at the same time, a spring mechanism is used. It is difficult to select the balance point, which leads to assembly, Debugging is very difficult;

[0006] 3. A single baffle is used for non-uniformity compensation. Its area must be able to cover the entire photosensitive surface when it is covered, but the added weight at the far end of the baffle will cause the outer diameter of the imaging system to expand when it is opened. In addition, the counterweight is usually designed more Large, which is not conducive to the miniaturization design of the imaging system;

[0007] 4. In order to cooperate with the "background subtraction" operation of the background program, it is often necessary to adjust the shutter online. For the shutter with a "spoon-shaped" baffle, the process from closing to opening mainly depends on the cooperation of the spring and the counterweight. The opening and closing time It is difficult and impossible to make random online adjustments, especially when faced with the demand for high-speed shutters;

[0008] 5. Widely used in the shutter components of various visible light cameras. Although they are highly integrated and small in size, they are mainly for industrial mass production, without considering the structural strength, and the structural design does not consider high impact and high overload applications. Therefore, it cannot To meet the customization needs of infrared focal plane high impact, high overload environment

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