A motorized diaphragm with high temperature resistance and large dynamic adjustment range
An adjustment range and large dynamic technology, applied in the field of aperture, can solve the problem of small aperture adjustment range, and achieve the effect of high position accuracy
Active Publication Date: 2021-03-19
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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Problems solved by technology
[0006] The purpose of the present invention is to provide an electric diaphragm with high temperature resistance and large dynamic adjustment range, so as to solve the problem of the small adjustment range of the diaphragm in the prior art
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[0036] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0037] Such as Figure 1-Figure 7 As shown, an electric diaphragm with high temperature resistance and large dynamic adjustment range includes a horizontal diaphragm bottom plate 8 along the X direction with the long side. At one end in the X direction, there is a lower light hole vertically penetrating through the bottom plate of the diaphragm. The bottom plate 8 of the diaphragm is covered and connected with the top plate 1 of the diaphragm. The shafts are connected and the same size as the upper light hole, and the diaphragm slide plate 3 is installed in the chute of the diaphragm base plate 8 sliding along the X direction. The width of the diaphragm slide plate 3 in the Y direction is larger than the diameter of the upper and lower light holes. The X-direction end of the slide plate 3 faces between the upper and lower light passage holes, and the e...
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The invention discloses a high-temperature-resistant electric diaphragm with a large dynamic adjustment range. The electric diaphragm comprises a diaphragm bottom plate and a diaphragm top plate. A diaphragm sliding plate is installed in a chute formed in the diaphragm bottom plate in a sliding manner; a notch in an exponential function curve shape is formed at one end, facing the space between anupper light through hole and a lower light through hole, of the diaphragm sliding plate; and the diaphragm sliding plate is driven by a stepping motor to slide to the notch for coverage between the upper light through hole and the lower light through hole. According to the invention, with the novel notch in an exponential function curve shape at the diaphragm sliding plate, large dynamic range adjustment is realized; some parts are made of high-temperature-resistant heat insulating material being a polyimide material originally, so that core parts like the stepping motor are protected well; and on the basis of the cooling piece type design for the diaphragm bottom plate, the heat transferred by the diaphragm port can be dissipated well. Because of the stepping motor, the positional accuracy is high.
Description
technical field [0001] The invention relates to the field of diaphragms, in particular to an electric diaphragm with high temperature resistance and large dynamic adjustment range. Background technique [0002] At present, most of the electric diaphragms used in the market are rainbow diaphragms. The rainbow diaphragm is composed of a motor, a worm gear and a diaphragm plate. Due to the limitation of the mechanical structure, the adjustment range of the rainbow diaphragm is within 3 orders of magnitude. With the development of large dynamic range adjustable radiation calibration light sources based on isochromatic temperature adjustment technology, isochromatic temperature adjustment requires the minimum opening area ratio to reach the requirement of 10-5, that is, electric light with a large dynamic adjustment range of 5 orders of magnitude is required. However, the adjustment range of the current electric diaphragm cannot meet the requirements of use. At the same time, wi...
Claims
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IPC IPC(8): G02B26/02
CPCG02B26/023
Inventor 李佳伟陈洪耀刘辉司孝龙张黎明
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI