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Fast iris diaphragm driven by symmetric electromagnet

A technology of electromagnetic drive and diaphragm, applied in the direction of optics, electrical components, electromechanical devices, etc., to achieve the effect of reducing impact, reducing weight and improving reliability

Inactive Publication Date: 2011-04-06
INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is: to overcome the deficiencies of the prior art, the symmetrical electromagnetic drive fast iris of the present invention can solve the problems of automatic control, fast and reliable, impact resistance, vibration and other high requirements of the diaphragm

Method used

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  • Fast iris diaphragm driven by symmetric electromagnet
  • Fast iris diaphragm driven by symmetric electromagnet
  • Fast iris diaphragm driven by symmetric electromagnet

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Embodiment Construction

[0017] figure 1 with figure 2 An overall description has been made of the structure of the symmetrical electromagnetically driven fast iris diaphragm of the present invention, image 3 It is a description of the principle of the control system of the symmetrical electromagnetic drive fast iris diaphragm, Figure 4 ~ Figure 10 The sub-components are described in detail. The whole mechanism is composed of two identical unilateral diaphragms 50A and 50B. Although the component parts of the unilateral diaphragm are marked with A and B, the same serial numbers represent the same components. The connection of the two unilateral diaphragms 50A and 50B is realized through the guide rod hole 12 of the secondary bracket and the opposite guide rod 9 to form a kinematic pair. For the convenience of description, a single-side aperture 50A is taken as an example for illustration, and the other single-side aperture 50B has the same structure. At the same time, remove the annotations of ...

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Abstract

A fast iris diaphragm driven by symmetric electromagnet comprises: two symmetric one-sided diaphragms, each of which comprises a diaphragm blade, a first-level support, a secondary support, two fixing seats, two magnetism conductive plates, four permanent magnets, two guide bars, a drive coil plate and a photo-electric switch circuit board; and a drive control system, comprising a magnetic field formed by a photo-electric switch circuit board, a drive coil plate and four permanent magnets, and a drive control circuit; the drive control circuit converts the input control signal into the large power signal to drive the drive coil plate to push the first-level support to move; the first-level support drives the diaphragm blade to move to realize opening and closing of the diaphragm; the feedback signal transmitted back by the photo-electric switch circuit board is collected for judging the opening and closing situations of the diaphragm blade to control the effective opening and closing of the diaphragm blade. The fast iris diaphragm driven by symmetric electromagnet can realize the switching of the light transmission quantity of the optical system, and is applied to the occasions such as strong light protection of imaging device and changing of focus depth of the optical system, and also realizes the shutter effect or optical modulation.

Description

technical field [0001] The invention relates to a device for switching the luminous flux of an optical system. Background technique [0002] The actual optical system can only form a satisfactory image within a certain range of beam apertures. The limitation of the aperture is realized by the diaphragm. The diaphragm can improve the imaging quality of the optical system, limit the luminous flux of the optical system and block stray light. . Apertures are usually composed of structural parts of optical parts or special structural elements, and are divided into aperture diaphragms, market diaphragms, and stray light diaphragms according to their uses. The diaphragm can be divided into a fixed diaphragm and a variable diaphragm. The variable diaphragm is a component that changes the luminous flux of the optical system by changing the aperture of the light. Iris diaphragms are commonly used on photographic lenses to change the aperture of the camera, and some are used in phot...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B7/00H02K33/18
Inventor 韩维强李华
Owner INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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