A structure for automatically adjusting the aperture diameter of a diaphragm

Abstract

The invention discloses a structure for automatically adjusting the aperture diameter of a diaphragm, which includes a mirror body (1), a Motor (3), A drive wheel (5), A driven wheel (6) and a limiting screw (7), wherein the drive wheel (5) is arranged on the motor (3) and meshed with the driven wheel (6), the mirror body (1) is provided with an arc-shaped groove along the circumference corresponding to the position of the diaphragm (2), the driven wheel (6) is arranged on the outer periphery of the mirror body (1), The limiting screw (7) passes through the through hole and the arc groove in turn, and the ends thereof are arranged in the threaded holes of the diaphragm (2). The mirror body (1) is provided with two microswitches (8) which are both communicated with the conductor of the motor (3) at intervals. The driven wheel (6) is fixed with a stopper (10) which extends to the microswitches (8) and is matched with the microswitches (8). The invention can realize the automatic adjustment of the diaphragm diameter of the diaphragm, and realize the sensitive limit at the same time.

Description

technical field [0001] The invention belongs to the field of iris diaphragm technology, and more specifically relates to a structure for automatically adjusting the diameter of the iris diaphragm. Background technique [0002] In the optical system of white light band CCD imaging, it is necessary to adjust the size of the luminous flux according to the light and dark conditions of the surrounding environment, so that the quality of CCD imaging can achieve the clearest effect. At this time, it is necessary to install an iris diaphragm in the optical system, and adjust the luminous flux by adjusting the diameter of the iris diaphragm, so as to meet the requirements of imaging quality. [0003] However, the size of the aperture diameter of the existing variable diaphragm is mostly adjusted manually, which is inconvenient to operate in actual application on the product, or the diaphragm plate and transmission mechanism in the dimming mechanism are mostly designed and processed b...

AI Technical Summary

Problems solved by technology

[0004] The invention needs to be installed on an optical instrument, and cannot be directly used in a CCD optical system; and the fixing structure of the iris diaphragm is complicated, and three pull rods need to be provided, and the passage between the iris diaphragm and the driven wheel and the The dial is fixed and the structure is complex; using a photoelectric switch to limit the position, on the one hand, it is necessary to set a through hole for the light path to pass through the center of the fixed base and the driven gear, on the other hand, the cost of the photoelectric switch is high and the use requirements are high

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