Polarization neutral gray filter lens capable of being adjusted in electric control mode
A neutral grayscale, electronically controlled adjustment technology, applied in optics, optical components, camera bodies, etc., can solve problems such as limited application, poor manual adjustment and fine-tuning ability, and inability to adjust in real time, to expand the scope of application Effect
Pending Publication Date: 2020-05-22
中国空气动力研究与发展中心超高速空气动力研究所
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Problems solved by technology
Theoretically, this adjustable neutral gray mirror can realize the change of the transmitted light intensity from 0% to 100%, but the current adjustable neutral gray mirror adjustment method is to manually rotate the polarizer to change the polarization direction of the two polarizers. angle, it cannot be adjusted in real time during long-term photography or video recording, and the fine-tuning ability of manual adjustment is poor, which limits its application
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Embodiment 1
[0044] Polarizer I and polarizer II among the present invention are all diameters are 25.4mm, the linear polarizer of the visible light band of thickness 2.5mm, and transmission belt is the transmission belt that rubber makes, and thickness is no more than 2mm, except motor, transmission belt, All parts outside the polarizer are made of light alloy plastic; the fixed clamping piece I is a circular ring with an inner diameter of 23mm, an outer diameter of 27mm, and a thickness of 3.5mm, and its outer wall is provided with threads; the fixed clamping piece II has an outer diameter of the bottom 30.4mm, inner diameter 23mm, thickness 2mm, upper outer diameter 30.4mm, inner diameter 27mm, height 7.5mm, the inner wall is provided with threads; the diameter of the fixing screw is 3mm, the length is 3mm, and the "T" type movable clamping piece I is larger The outer diameter of the end is 30.4mm, and is provided with threads, the inner diameter is 20mm, the height is 4.5mm, the inner d...
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The invention discloses a polarization neutral gray filter lens capable of being electrically controlled and adjusted. The polarization neutral gray filter lens comprises a hollow support main body, wherein a fixed clamping sheet is connected to the upper end of the support main body; a polarizing film I is arranged in the fixed clamping sheet; the upper end of the supporting main body is connected with a front cover; and the lower end of the supporting body is connected with a movable clamping piece. A polarizing film II is arranged in the movable clamping sheet, and the lower end of the supporting body is further connected with a rear cover. A motor fixing support is arranged in the middle of the supporting body. A motor is arranged on the motor fixing support, a transmission belt is connected to a rotating shaft of the motor through a roller, an opening is formed in the side face of the supporting body, the transmission belt penetrates through the opening to be connected with the movable clamping piece, the polarizing film I and the polarizing film II are parallel to each other, and the center points of the polarizing film I and the polarizing film II are located on the same vertical shaft. The polarization neutral gray filter lens capable of being electrically controlled and adjusted has the advantages of being easy to operate, wide in application range and capable of adjusting the filtering effect of the filter lens in real time.
Description
technical field [0001] The invention belongs to the technical field of neutral gray scale filter devices, and in particular relates to an electronically adjustable polarized neutral gray scale filter mirror. Background technique [0002] Neutral gray scale filter referred to as "neutral gray filter" or ND mirror is a colorless to gray photographic filter, which uses the light absorption characteristics of the material to attenuate the light intensity of the optical element. In the field of photography and videography, the main purpose of using neutral gray mirrors is to prevent overexposure, such as shooting outdoors in strong sunlight or requiring a longer exposure time under normal light conditions. [0003] Ideally, the neutral gray mirror can attenuate light of all wavelengths to the same degree without causing chromatic aberration, but the traditional single-chip neutral gray mirror can only attenuate the light intensity to a single degree, so the neutral gray mirror us...
Claims
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Login to View More IPC IPC(8): G03B17/12G02B7/00G02B26/02
CPCG03B17/12G02B7/00G02B26/023
Inventor 王磊陈卫伍越
Owner 中国空气动力研究与发展中心超高速空气动力研究所