Focusing device in long-focus and heavy-caliber optical system

An optical system and large-aperture technology, applied in optics, optical components, installation, etc., can solve problems such as difficult to determine coaxial precision, large focusing error, and difficult installation and adjustment, and achieve easy installation and adjustment, simple structure, and adjustment The effect of high focus precision

Inactive Publication Date: 2011-08-17
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0003] In order to solve the problems that the existing focusing mechanism is difficult to determine the coaxial accuracy of the optical axis of other fixed mirror groups during installation, the installation and adjustment is difficult, and the focusing error is large, the present invention provides a long focal length, large aperture optical system. focusing device

Method used

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  • Focusing device in long-focus and heavy-caliber optical system
  • Focusing device in long-focus and heavy-caliber optical system
  • Focusing device in long-focus and heavy-caliber optical system

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specific Embodiment approach 1

[0014] Specific implementation mode one: combine Figure 2 to Figure 6 Illustrate this embodiment, the focusing device in the optical system with a long focal length and a large aperture includes an electronically controlled displacement platform 1 and a focusing lens group 2, it also includes a slide rail seat 3, a shift fork 4 and two cylinders 5, the described The focusing lens group 2 is arranged in the slide rail seat 3, the shift fork 4 is arranged on the outside of the slide rail seat 3, and the shift fork 4 is fixedly connected with the electronically controlled displacement platform 1; the focusing lens group 2 and the two cylinders 5 adopt Threaded connection, the two ends of the shift fork 4 are respectively provided with U-shaped grooves 4-1, two long slot holes 3-1 are opened on the slide rail seat 3, and the cylinder 5 passes through the long slots on the slide rail seat 3 in turn The hole 3-1 and the U-shaped groove 4-1 on the shift fork 4; the slide rail seat 3...

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Abstract

The invention discloses a focusing device in a long-focus and heavy-caliber optical system, relating to the technical field of optical machinery and aiming to solve the problems that the traditional focusing mechanism is difficult to determine the coaxial precision with optical axes of other fixed mirror groups during installation and has high difficulty in installation and adjustment. The devicecomprises an electric control displacement platform, a focusing mirror group, a sliding rail seat, a shifting fork and two cylinders, wherein the focusing mirror group is arranged in the sliding railseat; the shifting fork is arranged on the outer side of the sliding rail seat and is fixedly connected with the electric control displacement platform; the focusing mirror group is in threaded connection with the two cylinders; U-shaped grooves are respectively arranged at two ends of the shifting fork; the sliding rail seat is provided with two slotted holes; and the cylinders sequentially passthrough the slotted holes of the sliding rail seat and the U-shaped grooves of the shifting fork. The invention is widely applied to the optical system.

Description

technical field [0001] The invention relates to the field of optical machinery technology, in particular to a focusing device in an optical system. Background technique [0002] At present, the application environment of long focal length and large aperture optical systems is often relatively harsh, and the environment has many influences on the optical system. For example: changes in ambient temperature, changes in atmospheric pressure, system vibration, external shocks and other factors will cause the focal plane of the optical system to have a certain degree of axial offset, which will adversely affect the imaging quality of the system. The existing focusing mechanism consists of figure 1 As shown, the focus adjustment mechanism is mainly composed of a focus adjustment lens group and a high-precision electronically controlled mobile platform. The disadvantage of this structure is that it is difficult to guarantee the coaxial accuracy of the focus adjustment mechanism wit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B7/04
Inventor 邵帅曹立华
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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