Let's reveal the secret-OPPO vision shooting function

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/ 2019-04-24 / News

With the continuous optimization of the functions of mobile phone cameras, mobile phone shooting has gradually become a habit. For example, when we go out for a trip and swim in the mountains, we all like to take pictures of landscapes. Down, at this time, the mobile phone vision shooting function is our best "friends". Today, let's reveal the secret----OPPO vision shooting function.

Figure 1

One patent published by OPPO in 2017 (publication number CN 207166544 U) reveals a vision Shooting features of the phone.

The patent mentions that as shown in FIG. 2 and FIG. 3, the mobile phone with the distant view function includes the casing 10, the remote camera device 20 and the control circuit board. (not shown), wherein the distant view camera 20 includes an image pickup mounting case 201, a first convex lens assembly 202, and a second convex lens assembly 203. The housing 10 is formed with an installation space. The housing 10 is provided with a camera mounting hole 11 . The remote camera device 20 is mounted in the installation space, and the remote camera device 20 has a telephoto lens end 21 and a telephoto end 22 , and the telephoto lens end 21 is assembled. In the camera mounting hole 11 , the distance imaging end 22 is located in the installation space, the first convex lens assembly 202 is disposed at the first end of the imaging mounting shell 201 to form the telephoto lens end 21 , and the second convex lens assembly 203 is disposed on the imaging mounting shell 201 . The second end is formed to form the vision imaging end 22, and the first convex lens assembly 202 and the second convex lens assembly 203 form an optical combination having a telescope framing function. The control circuit board is installed in the installation space, and the photosensitive circuit module is disposed on the control circuit board (not As shown, the perspective imaging end 22 is disposed opposite the photo imaging module.

Figure 2

Figure 3

as shown in Figure 3, given in the patent The method of performing the distant shooting is achieved by: firstly, the target scene 101 reflects the light into the first convex lens assembly 202,The light is condensed by the first convex lens assembly 202 and irradiated onto the mirror 204, and then the light changes the path of the light propagation through the mirror 204, thereby illuminating the second convex lens assembly 203 with the light from the second convex lens assembly 203. 

After exiting, the photosensitive imaging module is sensitized and an imaging graphic 102 output is generated. When the position of the target scene 101 is changed, that is, the target scene 101 is changed by the imaging focal length of the optical combination composed of the first convex lens assembly 202 and the second convex lens assembly 203, by adjusting the first convex lens assembly 202 and the second convex lens assembly 203 at this time. The distance between them re-adjusts the correct imaging focal length to obtain a clear imaging pattern 102. 

The focal length adjustment of the optical combination formed by the first convex lens assembly 202 on the distant lens end 21 and the second convex lens assembly 203 of the distant imaging end 22 enables the telephoto camera 20 to have a telescope framing function, and then visor the distant view on the control circuit board Imaging is performed in the photographic imaging module to obtain a clear distant image.

further,The focal length adjustment of the optical combination formed by the first convex lens assembly 202 on the distant lens end 21 and the second convex lens assembly 203 of the distant imaging end 22 enables the telephoto camera 20 to have a telescope framing function, and then visor the distant view on the control circuit board Imaging in the photographic imaging module to obtain a clear distant image, and the implementation of the telescope framing function must rely on sufficient focal length adjustment distance. 

Therefore, in the design of the mobile phone with the distant shooting function, the camera mounting housing 201 includes The first straight shell segment 2011 and the second straight shell segment 2012 are connected at an angle to the second straight shell segment 2011, and the first convex lens assembly 202 is mounted on the first straight shell segment 2011, and the second convex lens assembly The 203 is mounted on the second straight shell segment 2012. The remote camera device 20 further includes a mirror 2041. The mirror 204 is mounted at the junction of the first straight shell segment 2011 and the second straight shell segment 2012. The mirror 2041 will be the first convex lens. Light incident from the component 202 is reflected to the second convex lens assembly 203. 

The camera mounting case 201 is designed to pass the transition between the first straight shell segment 2011 and the second straight shell segment 2012,And converting the framing light incident by the first convex lens component 202 to the second convex lens component 203 through the mirror 2041, thereby realizing changing the optical path of the optical combination and maintaining the optical focusing ability of the telescope, so that the design of the turning design The cover section 2011 and the second straight shell section 2012 can greatly reduce the focusing distance required for the distant viewfinder 20 to complete the distant view framing, and realize the maximum while ensuring the distant view of the distant view camera 20. The thin and light design of the limit.

The patent proposes that in the process of producing the mobile phone with the long-range shooting function, it is necessary to pre-write the control program for automatically adjusting the focal length in the control circuit board, And in the control circuit board, the reference sharpness value required for judging the resolution of the distant view image is pre-written, and when the user starts the remote shooting function to shoot, the control circuit board of the mobile phone enters the automatic focusing program by default. 

The control circuit board controls the drive structure to move the first convex lens assembly 202 and/or the second convex lens assembly 203 to adjust the focal length,And the control circuit board detects in real time the judgment of the sharpness of the framing image obtained by performing the distant framing in the adjustment process, and compares the detected image sharpness value with the reference sharpness value, and continuously approaches the reference sharpness value. And finally meet the requirements of the reference sharpness value, so as to display a clear distant image on the screen of the mobile phone, when the user presses the shooting control button to perform the shooting behavior. 

Of course, while designing the function of automatically adjusting the focus of the mobile phone, the manual self-adjusting focusing program is also set in the control circuit board. When the user selects the manual auto focus control button, the control circuit board automatically exits the control program for automatically adjusting the focus. At this time, the user operates the corresponding adjustment control button to the first convex lens assembly 202 and the second convex lens assembly 203. The distance between the focal lengths is adjusted.

In our life, we often manually adjust the focus manually. The patent gives a manual autonomous focusing method. When the first convex lens assembly 202 is fixedly set, adjust the control key. The control driving structure drives the second convex lens assembly 203 to move; when the second convex lens assembly 203 is fixedly disposed,The adjustment control key controls the drive structure to drive the first convex lens assembly 202 to move; when the first convex lens assembly 202 is movable within the first straight housing segment 2011, and the second convex lens assembly 203 is movable within the second straight housing segment 2012, this The first adjustment control key for controlling the first driving structure and the second adjustment control key for controlling the second driving structure are provided, and the user drives the first driving structure by controlling the first adjustment control key and the second adjustment control key respectively. A convex lens assembly 202 is moved to drive the second convex lens assembly 203 to move by the second driving structure, thereby achieving manual autonomous focusing.

The patent also provides another method for obtaining a clear vision, in the process of using the telephoto camera 20 for focus adjustment to achieve the distant view function. Simultaneously moving the first convex lens component 202 and the second convex lens component 203 simultaneously, so that the first convex lens component 202 and the second convex lens component 203 mutually assist in achieving focal length adjustment between the two, that is, the first convex lens The assembly 202 is movable along a central axis of the first straight shell segment 2011,And the second convex lens assembly 203 is movable along the central axis direction of the second straight shell segment 2012, at this time, the driving structure includes a first driving structure and a second driving structure, and both the first driving structure and the second driving structure are combined with the control circuit The board is electrically connected, the first driving structure is electrically connected to the first convex lens assembly 202, and the second driving structure is electrically connected to the second convex lens assembly 203. 

Thus, by operating the control circuit board to control the first driving structure to drive the first convex lens assembly 202 to move within the first straight shell segment 2011, the second driving structure driving the second convex lens assembly 203 to move within the second straight shell segment 2012 to adjust The imaging focal length between the first convex lens assembly 202 and the second convex lens assembly 203 is such that the focal length between the first convex lens assembly 202 and the second convex lens assembly 203 is accurately adjusted to obtain a clear distant view image.

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