Method of realizing three-dimensional multi-region automatic focusing by utilizing lens-incline-controllable focusing motor

Abstract

The invention discloses a method of realizing three-dimensional multi-region automatic focusing by utilizing a lens-incline-controllable focusing motor, comprising the following steps of A, carrying out z axis automatic focusing; B, carrying out Rx axis automatic focusing or Ry axis automatic focusing; and C, carrying out Ry axis automatic focusing or Rx axis automatic focusing. Compared with the traditional automatic focusing method, the method provides more lens motion dimensionalities for controlling, and can realize three-dimensional multi-region automatic focusing through effectively controlling the position (the first dimensionality) of a lens and the dip angles of two orthogonal directions (the second and third dimensionalities). When an object inclines until the depth of field cannot cover the whole object simultaneously, the focusing on all regions can be automatically realized, manual focusing is not needed, and the method has the advantages that the reliability is higher, the speed is rapider, the precision is higher, and no training is needed.

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 a...

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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