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An automatic focusing device and system

A technology of automatic focusing and focusing value, applied in focusing devices, parts and installations of TV systems, etc., can solve the problem of high cost of telescopes, and achieve the effect of shortening focusing time, reducing costs, and improving focusing accuracy.

Active Publication Date: 2018-10-09
TAGYE TECH HANGZHOU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Obviously, lenses with autofocus, microscopes, telescopes, etc. are all expensive

Method used

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  • An automatic focusing device and system
  • An automatic focusing device and system
  • An automatic focusing device and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Such as figure 1 As shown, the traditional microscope or telescope device magnifies the real image formed by the objective lens again, so as to form a clear virtual image at the apparent distance. This kind of device can only be used for observation, but cannot carry out image analysis and preservation. Electron microscopes and telescopes make up for this defect very well. figure 2 Shows how electron microscopes and electron telescopes work. Although traditional electron microscopes and electronic telescopes convert traditional optical signals into digital signals and realize image analysis and preservation, they lack autofocus functions (here does not include microscopes and telescopes with autofocus functions, because they have autofocus functions). The principle of realizing the autofocus function of the optical system with focusing function is different from that of the present invention, which is introduced in the background technology). The present invention ai...

Embodiment 2

[0073] The embodiment that the second technical problem to be solved by the present invention takes is as follows:

[0074] In traditional microscopes and telescopes, since the working distance is fixed, if the height of the measured object changes, the image will be unclear.

[0075] Such as image 3 and Figure 6 As shown, this embodiment differs from conventional electron microscopes and electron telescopes in that the object distance u is variable. According to the optical imaging formula 1, f is fixed, and the image distance v is variable (from v to v'), so the object distance u is variable (from u to u'). This means that even if the height of the measured object changes, the main control unit inside the autofocus device can execute the focus search algorithm to automatically control the movement of the Sensor board to change the image distance (from v to v') to make the image clear.

[0076] The implementation steps of automatic focusing are the same as those in Embodim...

Embodiment 3

[0078] Figure 8 It is a schematic block diagram of an optical system including an auto-focusing device. The optical system can be an auto-focusing microscope system, an auto-focusing telescope system, or an auto-focusing industrial camera, which is composed of an auto-focusing device, a front-end optical system and external equipment. Among them, the autofocus device in Embodiment 3 synthesizes the autofocus functional modules of Embodiment 1 and Embodiment 2, and correspondingly introduces the implementation of specific hardware entities of some functional modules. For example, in Embodiment 3, the image The data processing unit 226a and the focus value calculation unit 226b are integrated in a digital signal processor DSP. In other embodiments, it may also be implemented by hardware such as a large-scale programmable logic device or a central processing unit CPU. The present invention does not limit the specific hardware implementation, as long as the hardware implementati...

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PUM

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Abstract

The invention relates to an automatic focusing device and system. Including Sensor drive unit, main control unit, and interface unit: the main control unit of the autofocus device executes the focus search algorithm to control the movement of the Sensor board, and it automatically focuses by adjusting the image distance. The present invention can realize automatic focusing without moving or changing the front-end optical system, improves focusing precision and efficiency, shortens focusing time, and reduces system complexity and cost.

Description

technical field [0001] The invention relates to the technical fields of an automatic focusing electron microscope, an automatic focusing electronic telescope and an automatic focusing industrial camera, and in particular relates to an automatic focusing device. Background technique [0002] Whether the traditional camera is a CMOS or a CCD camera, the imaging device is fixed on the base, connected to the front-end lens through the C port or CS port, and the imaging device cannot be moved. The function of the camera is to convert the optical signal into an electrical signal and output it to the terminal through photoelectric conversion. There are various ways to output images from the camera, such as VGA, HDMI, YPBPR, etc. It can also be output to the PC through the USB interface for display, and various image processing can be performed through the PC. Its advantage is that through a standard interface (C interface or CS interface), the camera and lens (including ordinary f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/232G03B13/36G02B7/36
Inventor 徐加军楼品琪龚晔
Owner TAGYE TECH HANGZHOU CO LTD
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