A method for realizing 3-dimensional multi-zone autofocus by using a focus motor capable of controlling lens tilt

Abstract

The invention discloses a method for realizing 3-dimensional multi-zone auto-focus by using a focus motor capable of controlling the tilt of the lens. The method includes the following steps: A. performing z-axis auto-focus; B. performing Rx-axis auto-focus or performing Ry-axis auto-focus Focusing; C. Perform Ry-axis auto-focus or perform Rx-axis auto-focus. Compared with the traditional autofocus, the present invention provides more dimensions for controlling the movement of the lens, and can realize 3-dimensional Multi-zone autofocus. When the target is tilted to the depth of field and fails to cover the entire target at the same time, the present invention can automatically realize full-area focusing without manual implementation, and has the advantages of higher reliability, faster, more accurate, and no need for training.

Description

technical field [0001] The invention discloses a lens focusing method, in particular a method for realizing 3-dimensional multi-zone automatic focusing by using a focus motor capable of controlling the tilt of the lens. Background technique [0002] With the overwhelming impact of smart phones on the mobile phone market, nine out of ten mobile phones are smart phones, and the camera function is almost a must-have function for general smart phones. At present, the increasing popularity of high-pixel cameras of 5 million or more in smart phones makes the quality of photos taken by mobile phones closer and closer to that of digital cameras. However, the high-pixel mobile phone camera in the prior art does not contain some optical and mechanical parts of the digital camera. The absence of this hardware will undoubtedly make the photographing effect of the camera phone worse than that of the digital camera. More specifically, the current A camera phone only has at most one autof...

AI Technical Summary

Problems solved by technology

However, since these motors cannot control the tilt of the lens relative to the image sensor, they also cannot adjust the angle between the optical axis of the lens and the image sensor.

When the focal plane of the lens is not parallel to the image sensor plane (such as when the focal plane of the lens is skewed, or when shooting objects at different distances at the same time), these motors cannot control the lens to achieve clear focus of the image in the entire imaging range

In addition, the structure of these motors is very complex, the size and power consumption are relatively large, and they have not yet been popularized in the smartphone market.

[0004] On the other hand, although the tilt-shift lens has been introduced for many years for large-scale camera devices, due to the weight and volume of the lens, so far there has not been a mechanism that can automatically change the optical axis, which limits the realization of automatic 3D multi- Zone AF Possibility

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