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A dimmable aperture device

A technology for adjusting apertures and apertures, applied in the field of optics, can solve problems such as non-circular apertures, cusps, and complex structures of iris apertures, and achieve the effects of convenient installation and debugging, simple structure, and fewer parts

Pending Publication Date: 2019-01-04
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this device still cannot avoid the complex structure of the iris aperture, the aperture of the aperture is not circular, and there are deficiencies in sharp points.

Method used

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  • A dimmable aperture device
  • A dimmable aperture device
  • A dimmable aperture device

Examples

Experimental program
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Embodiment Construction

[0021] Hereinafter, one embodiment of the present invention will be described using the drawings.

[0022] figure 1 It is a three-dimensional structure schematic diagram of an embodiment of the present invention, figure 2 will be figure 1 The partially cut and enlarged schematic diagram of the I position, where the dimming ring and leads are not shown, image 3 It is a schematic front view for explaining the relationship between positioning screws, adjusting screws, leads and light-shielding film, in which the first ring is partially cut off, and the light-shielding film only shows the aperture, Figure 4 It is a schematic side view illustrating the relationship between the set screw, the adjustment screw, the lead wire and the light-shielding film, Figure 5 It is a schematic diagram illustrating aperture zooming by pulling the lead wire.

[0023] Such as figure 1 , figure 2 and image 3 The shown adjustable aperture device includes a first ring 1, a dimming ring 2, ...

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Abstract

The invention provides a dimmable aperture device, which comprises a first ring, a dimming ring, a second ring, a plurality of leads, a light shielding film, a plurality of positioning screws and a plurality of adjusting screws. Characterized in that the light-shielding film is a cylindrical, light-opaque elastic film; The first ring and the second ring are coaxially fixed together, and both end faces of the light shielding film are fixed respectively; The dimming ring is coaxially arranged between the first ring and the second ring and is rotatable about the axis; One end of each lead wire isfixed on the first ring by a positioning screw, the other end is wound around the outer wall of the light shielding film, and is fixed on the dimming ring by an adjusting screw; All the leads are equally spaced along the circumference of the outer wall of the light-shielding film, and the outer wall of the light-shielding film is constrained to form an approximately circular aperture. The dimmingring rotates relative to the first ring to pull the lead wire and the outer wall of the light shielding film, thereby enlarging and reducing the aperture. The invention has the advantages that the aperture is approximately circular under various apertures, and the aperture can be continuously adjusted in size.

Description

technical field [0001] The invention belongs to the field of optics, in particular to an adjustable aperture device. Background technique [0002] The adjustable aperture is a device used to control how much light can pass through and then enter the photosensitive surface. It is commonly used in optical equipment such as cameras, microscopes, and laser testers. The original adjustable aperture is just a series of circular holes of different sizes, arranged on a disc with a central axis. By rotating the disc, different apertures can be selected to achieve the effect of controlling the aperture. This aperture is still used in microscopes and other equipment. middle. Since then, a cat-eye aperture has appeared, which is composed of two sheets with elliptical or diamond-shaped holes in the center. The size of the aperture is changed by the relative movement of the two sheets. [0003] Both of the above two adjustable apertures have the advantages of fewer parts and simple stru...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B9/02
CPCG03B9/02
Inventor 刘迪张帆刚宪约朱少杰
Owner SHANDONG UNIV OF TECH
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