Low-power consumption bistable-state electronic mechanical shutter
An electro-mechanical, bistable technology, applied in shutters, cameras, optics, etc., can solve problems such as affecting the accuracy of exposure time control, complex driving circuits, etc., to simplify the mechanical structure and control strategy, improve coupling efficiency, and improve control accuracy. Effect
Inactive Publication Date: 2013-08-14
BEIJING GUOKE HONGPU PHOTOELECTRIC TECH CO LTD
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Problems solved by technology
Therefore, the driving circuit of this type of electromechanical shutter is relatively complicated, and the generation of high voltage and its driving of the electromagnet will bring great challenges to the system EMC; The generated power consumption also puts a lot of pressure on the entire system; in addition, the mechanical collision with the shutter body when the shutter blade opens and closes will cause a certain amount of rebound, affecting the control accuracy of the exposure time
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[0017] Such as figure 1 As shown, the fixed ring 1, the moving ring 2, and the blades 3 constitute an iris system, and its structure will not be described in detail here. Rotating the motion ring 2 can drive the blades 3 to adjust the size of the light aperture. The present invention only controls the blades to switch between the two boundary conditions of fully open and fully closed, so as to realize the shutter function.
[0018] The stator coil 4 and the mover shaft 5 form a two-way integrated electromagnet. When the stator coil 4 is supplied with a forward current, the mover shaft 5 moves in the direction of its extension line to the limit position, and at this time even if the stator coil 4. When the power is turned off, the mover shaft 5 will remain in the original position stably until the reverse current is passed to the stator coil 4; when the reverse current is passed to the stator coil 4, the mover shaft 5 will retract to the position before the extension in the op...
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The invention discloses a low-power consumption bistable-state electronic mechanical shutter, comprising an iris diaphragm system, wherein the iris diaphragm system comprises a fixed ring, a movable ring and blades and also comprises a bidirectional integrated electromagnet; the bidirectional integrated electromagnet comprises a stator coil and a rotor shaft; the stator coil is fixed on the fixed ring; the outer top end of the rotor shaft is connected with a linear rack; an arc-shaped rack is arranged on the movable ring; and the linear rack is coupled with the arc-shaped rack. The bidirectional integrated electromagnet drives the linear rack and the arc-shaped rack in sequence, so that the movable ring of the iris diaphragm system does bistable-state reciprocating motion, the opening and closing of the blades are controlled, the mechanical structure and the control strategy are greatly simplified, the coupling efficiency is improved, the stability of a shutter system is increased, the exposure time control precision is enhanced, and the shutter is applicable to large-scale clear apertures.
Description
technical field [0001] The invention relates to a shutter control device, in particular to a low power consumption bistable electromechanical shutter. Background technique [0002] In the imaging process of the full-frame transfer CCD and other related applications, the electromechanical shutter can block the entry of external light within a controllable time, so that the CCD can complete charge transfer or achieve other purposes. Its performance affects a series of crucial parameters such as the weight, power consumption, and imaging quality of the imaging system. Especially in the application examples of large-area full-frame transfer CCDs, due to the large aperture of the shutter required, the operating time becomes longer, and the accuracy of switching time is higher. Its stability and power consumption have become the research and development of this type of shutter. focus. [0003] In the prior art, most of the traditional electromechanical shutters use electromagnet...
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Inventor 赵宝玮相里斌黄旻吕群波刘玖
Owner BEIJING GUOKE HONGPU PHOTOELECTRIC TECH CO LTD