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Lens focusing method and mechanism and lens

A lens and focusing technology, which is applied in the field of optical systems, can solve problems such as easy jamming, poor stability, and large friction, and achieve the effects of reducing friction, stabilizing the system and ensuring reliability, and stable and smooth rotation

Active Publication Date: 2019-02-05
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims to overcome the technical defects of poor stability, high friction and easy to get stuck in the existing focusing mechanism, and provides a lens focusing mechanism

Method used

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  • Lens focusing method and mechanism and lens
  • Lens focusing method and mechanism and lens
  • Lens focusing method and mechanism and lens

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Embodiment Construction

[0031] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention.

[0032] The principle of the invention is: the method processes multi-threads on the outer circle of the cylindrical cam sleeve, and realizes the rotation of the cam sleeve through the rotation of the multi-threads. Due to the stable and smooth rotation of the multi-thread, the friction force is greatly reduced and frustration is avoided, especially for manual focusing, which greatly improves the feel of the system. And because no complex redundant mechanism is introduced into the system, the stability and reliability of the system are guaranteed, and the assembly is also very simple. ...

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Abstract

The invention relates to the technical field of optical systems, and particularly discloses a lens focusing mechanism. The lens focusing mechanism comprises a focusing bracelet, a fixed cylinder, at least one cylindrical pin and a cylindrical cam sleeve. Multiple threads are arranged on the outer cylindrical surface of the cylindrical cam sleeve, and multiple threads matched with the cylindrical cam sleeve are arranged on the inner side of the fixed cylinder. The cylindrical cam sleeve is radially provided with at least one cam groove, the cylindrical pins are radially uniformly distributed onthe outer circle of a lens barrel, and the cylindrical pins correspond to the cam grooves one by one. The fixed cylinder is fixedly connected with a lens, the cylindrical cam sleeve is sleeved with the fixed cylinder, the cylindrical cam sleeve is connected with the lens barrel through the cam grooves and the cylindrical pins, and the focusing bracelet is fixedly connected with the cylindrical cam sleeve. The focusing mechanism has the beneficial effects of effectively reducing friction, accurately focusing and being stable and reliable.

Description

technical field [0001] The invention relates to the technical field of optical systems, in particular to a lens focusing method, a focusing mechanism and a lens. Background technique [0002] Lens focus is the most commonly used function of the lens. The focus ring on the lens is manually or electrically rotated to realize the linear movement of the lens barrel, thereby realizing the focus function of the lens. Now the focusing of industrial and commercial lenses is generally realized by a cylindrical cam sleeve. Through the rotation of the cylindrical cam sleeve relative to the lens barrel, the linear motion of the lens barrel that requires linear motion is realized, thereby realizing the focusing function. There are generally two ways to rotate the cylindrical cam sleeve, electric and manual. Electric focusing needs to process gears and other structures on the cylindrical cam sleeve to cooperate with the motor; manual focusing needs to process hand patterns on the cylindr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B7/10
CPCG02B7/10
Inventor 马俊林刘英杜杰邢妍
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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