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Focusing presetting bit rectification method

A technology of preset position and focus position, which is applied in the directions of installation, optics, instruments, etc., can solve the problems such as the reduction of focus definition, achieve the solution of preset position offset, eliminate focus preset position offset, and focus position accuracy Effect

Active Publication Date: 2018-02-06
山东神戎电子股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But in practice, lenses often have backlash, i.e. a preset that is in sharp focus when set in one direction is less sharp when called from the other direction

Method used

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  • Focusing presetting bit rectification method

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Effect test

Embodiment 1

[0017] In this embodiment, the correction method of the focus preset position is applied to the lens of the thermal imager, and the position of the lens is collected by a potentiometer, such as figure 1 Shown, the specific steps of this embodiment are:

[0018] S01), set a flag to indicate the direction when setting the preset position, when setting the preset position, there are two directions from near to far (near to far) and from far to near (far to near), use 1 to indicate near to The preset position of far, 0 means the preset position from far to near;

[0019] S02), when calling the preset position, judge whether the preset position to be called is from near to far direction (abbreviated as far direction in the figure), if so, then judge the direction of the current focus position, if the current position is on the near side , that is, the focus position is adjusted from near to far, and the focus direction of the focus position is the same as the direction when settin...

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Abstract

The invention discloses a focusing presetting bit rectification method; the method comprises the following steps: setting a flag bit so as to represent the direction when the flag bit is set; comparing the flag bit setting direction with a focusing position direction; supplementing a backhaul gap or directly invoking the presetting bit, thus effectively eliminating the focusing presetting bit offset caused by lens backhaul gap reasons, and solving the presetting bit offset problems. In addition, a threshold and a compensation value are set, so the focusing position is more accurate.

Description

technical field [0001] The invention relates to a method for correcting a focus preset position, which can be used for visible light and thermal imaging lenses and similar products with an electric focus function, and can eliminate the problem of focus preset position offset caused by the return gap of the lens and the like. Background technique [0002] With the further development of security technology, intelligence and unattended features have become one of the trends in the development of monitoring systems. As front-end equipment, monitors play a pivotal role in monitoring systems and need to cooperate with background software to achieve more intelligence. , Automatic functions, the realization of these intelligent functions must first rely on clear images, especially high-definition products have higher requirements for the accuracy of lens focus position. But in practice, lenses often have a backlash, a preset that is in sharp focus when set in one direction, and is ...

Claims

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Application Information

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IPC IPC(8): G02B7/04
CPCG02B7/04
Inventor 刘明庞博魏磊
Owner 山东神戎电子股份有限公司