Imaging device, electronic device, method of manufacturing imaging device, and method of manufacturing electronic device

Abstract

An imaging device according to an embodiment of the present disclosure includes: an optical lens, wherein an object to be imaged is located on a first side of the optical lens; and an imaging sensor, located on a second side of the optical lens, the second side being an opposite side of the first side of the optical lens, wherein 100% H of an image height of an image of the object 100 The position is located at the corner of the imaging sensor.

Description

Technical Field

[0001] The present disclosure relates to an imaging device, an electronic device, a method of manufacturing an imaging device, and a method of manufacturing an electronic device. Background Art

[0002] Nowadays, many electronic devices have imaging devices for taking photos anytime and anywhere. One of the most popular electronic devices equipped with such imaging devices is the smartphone.

[0003] To reduce the thickness of electronic devices, imaging devices with small imaging sensors are used in the electronic devices, or thicker projection portions for the imaging devices are partially formed in the electronic devices. The projection portions of the electronic devices are sometimes damaged, limiting the design freedom of the electronic devices.

[0004] Over the past few decades, miniaturization has been a defining challenge in optical design. This has led to numerous techniques for modifying the optical lens itself to achieve miniaturization. However, this approach has become insufficient as users demand thinner electronic devices for portability and aesthetics. Summary of the Invention

[0005] The present disclosure aims to solve at least one of the above technical problems. Therefore, the present disclosure needs to provide an imaging device, an electronic device, a method for manufacturing an imaging device, and a method for manufacturing an electronic device.

[0006] According to the present disclosure, an imaging device may include:

[0007] an optical lens, wherein an object to be imaged may be located on a first side of the optical lens; and

[0008] The imaging sensor is located on a second side of the optical lens, which second side may be an opposite side of the first side of the optical lens, wherein 100% of the image height H of the object image 100 The position can be located at a corner of the imaging sensor.

[0009] In some embodiments, a distortion correction process may be performed on the object image on the imaging sensor to generate a final target image.

[0010] In some embodiments, the optical lens may produce pincushion distortion, the edges of the final target image may be determined based on the corners of the object image at the corners of the imaging sensor, and when generating the final target image, outer regions of the object image that may be outside the final target image may be cropped.

[0011] In some embodiments, 100% of the image height H of the object image on the imaging sensor of the optical lens 100 The distortion rate D 100 Equal to or greater than 5% and equal to or less than DNM , where D NM =4×L / 1000, L=((1 / 2×M) 2 +(1 / 2×N) 2 ) 1 / 2 , M may be the number of pixels in the vertical direction of the imaging sensor, and N may be the number of pixels in the horizontal direction of the imaging sensor.

[0012] In some embodiments, the distortion curve of the optical lens represented in the coordinate system can be linearized by two or more linear lines, wherein the X-axis of the coordinate system can be the distortion rate D, and the Y-axis of the coordinate system can be the percentage of the image height H of the object image on the imaging sensor.

[0013] In some embodiments, the linear line consists of a first linear line and a second linear line, wherein the first linear line can be approximated to the lower portion of the image height of the distortion curve in the coordinate system, and the second linear line can be approximated to the higher portion of the image height of the distortion curve in the coordinate system.

[0014] In some embodiments, the angle α1 may be greater than the angle α2, wherein the angle α1 may be the angle formed by the first linear line and the X-axis of the coordinate system, and the angle α2 may be the angle formed by the second linear line and the X-axis of the coordinate system.

[0015] In some embodiments, the image height H A The percentage may be the Y coordinate of the intersection of the first linear line and the second linear line, and the image height H A The percentage may be equal to or greater than 20% and equal to or less than 50%.

[0016] In some embodiments, the distortion rate D A It can be the X coordinate of the intersection of the first linear line and the second linear line, the image height H A The percentage may be the Y coordinate of the intersection of the first linear line L1 and the second linear line L2, and the distortion rate D A Can be smaller than D 100 ×(H A / H 100 ), where percentage H 100 Can be 100%, distortion rate D 100 Can be 100% of the image height H 100 The distortion rate at .

[0017] In some embodiments, the linear line may consist of a first linear line, a second linear line, and a third linear line, wherein the first linear line may approximate a lower portion of the image height of the distortion curve, the second linear line may approximate a middle portion of the image height of the distortion curve, and the third linear line may approximate a higher portion of the image height of the distortion curve.

[0018] In some embodiments, angle α1 may be greater than angle α2, and angle α2 may be greater than angle α3, wherein angle α1 may be the angle formed by the first linear line and the X-axis of the coordinate system, angle α2 may be the angle formed by the second linear line and the X-axis of the coordinate system, and angle α3 may be the angle formed by the third linear line and the X-axis of the coordinate system.

[0019] In some embodiments, the image height H A The percentage may be the Y coordinate of the intersection of the first linear line and the second linear line, and the image height H A The percentage may be equal to or greater than 20% and equal to or less than 50%, and the image height H B The percentage may be the Y coordinate of the intersection of the second linear line and the third linear line, and the image height H B The percentage may be equal to or greater than 70% and equal to or less than 90%.

[0020] In some embodiments, the distortion rate D A It can be the X coordinate of the intersection of the first linear line and the second linear line, the distortion rate D B It can be the X coordinate of the intersection of the second linear line and the third linear line, the image height H A The percentage may be the Y coordinate of the intersection of the first linear line and the second linear line, and the image height H B The percentage can be the Y coordinate of the intersection of the second linear line and the third linear line, and the distortion rate D A Can be smaller than D 100 ×(H A / H 100 ), and the distortion rate D B Can be smaller than D 100 ×(H B / H 100 ), where the image height H 100 The percentage can be 100%, the distortion rate D 100 Can be 100% of the image height H 100 The distortion rate at .

[0021] According to the present disclosure, an electronic device may include:

[0022] An imaging device as described above; and

[0023] The distortion correction processor is configured to perform a distortion correction process to correct the distortion of the object image on the imaging sensor to generate a final target image.

[0024] According to the present disclosure, a method of manufacturing an imaging device may include:

[0025] providing support structures;

[0026] Providing optical lenses;

[0027] providing an imaging sensor; and

[0028] Assembling the support member, the optical lens, and the imaging sensor so that the object to be imaged can be located on a first side of the optical lens, and the imaging sensor can be located on a second side of the optical lens, the second side being an opposite side of the first side of the optical lens, wherein 100% of the image height H of the object image 100 The position is located at the corner of the imaging sensor.

[0029] In some embodiments, a distortion correction process may be performed on the object image on the imaging sensor to generate a final target image.

[0030] In some embodiments, the optical lens may produce pincushion distortion, the edges of the final target image may be determined based on the corners of the object image at the corners of the imaging sensor, and when generating the final target image, outer regions of the object image that may be outside the final target image may be cropped.

[0031] In some embodiments, the image height H of the object image on the imaging sensor of the optical lens 100 The distortion rate D at 100% 100 Equal to or greater than 5% and equal to or less than D NM , where D NM =4×L / 1000, L=((1 / 2×M) 2 +(1 / 2×N) 2 ) 1 / 2 , M may be the number of pixels in the vertical direction of the imaging sensor, and N may be the number of pixels in the horizontal direction of the imaging sensor.

[0032] In some embodiments, the distortion curve of the optical lens represented in the coordinate system can be linearized by two or more linear lines, wherein the X-axis of the coordinate system can be the distortion rate D, and the Y-axis of the coordinate system can be the percentage of the image height H of the object image on the imaging sensor.

[0033] In some embodiments, the linear line consists of a first linear line and a second linear line, wherein the first linear line can be approximated to the lower portion of the image height of the distortion curve in the coordinate system, and the second linear line can be approximated to the higher portion of the image height of the distortion curve in the coordinate system.

[0034] In some embodiments, the angle α1 may be greater than the angle α2, wherein the angle α1 may be the angle formed by the first linear line and the X-axis of the coordinate system, and the angle α2 may be the angle formed by the second linear line and the X-axis of the coordinate system.

[0035] In some embodiments, the image height H A The percentage may be the Y coordinate of the intersection of the first linear line and the second linear line, and the image height H A The percentage may be equal to or greater than 20% and equal to or less than 50%.

[0036] In some embodiments, the distortion rate D A It can be the X coordinate of the intersection of the first linear line and the second linear line, the image height H A The percentage may be the Y coordinate of the intersection of the first linear line L1 and the second linear line L2, and the distortion rate D A Can be smaller than D 100 ×(H A / H 100 ), where percentage H 100 Can be 100%, distortion rate D 100 Can be 100% of the image height H 100 The distortion rate at .

[0037] In some embodiments, the linear line may consist of a first linear line, a second linear line, and a third linear line, wherein the first linear line may approximate a lower portion of the image height of the distortion curve, the second linear line may approximate a middle portion of the image height of the distortion curve, and the third linear line may approximate a higher portion of the image height of the distortion curve.

[0038] In some embodiments, angle α1 may be greater than angle α2, and angle α2 may be greater than angle α3, wherein angle α1 may be the angle formed by the first linear line and the X-axis of the coordinate system, angle α2 may be the angle formed by the second linear line and the X-axis of the coordinate system, and angle α3 may be the angle formed by the third linear line and the X-axis of the coordinate system.

[0039] In some embodiments, the image height H A The percentage may be the Y coordinate of the intersection of the first linear line and the second linear line, and the image height H A The percentage may be equal to or greater than 20% and equal to or less than 50%, and the image height H B The percentage may be the Y coordinate of the intersection of the second linear line and the third linear line, and the image height H B The percentage may be equal to or greater than 70% and equal to or less than 90%.

[0040] In some embodiments, the distortion rate D A It can be the X coordinate of the intersection of the first linear line and the second linear line, the distortion rate D B It can be the X coordinate of the intersection of the second linear line and the third linear line, the image height HA The percentage may be the Y coordinate of the intersection of the first linear line and the second linear line, and the image height H B The percentage can be the Y coordinate of the intersection of the second linear line and the third linear line, and the distortion rate D A Can be smaller than D 100 ×(H A / H 100 ), and the distortion rate D B Can be smaller than D 100 ×(H B / H 100 ), where the image height H 100 The percentage can be 100%, the distortion rate D 100 Can be 100% of the image height H 100 The distortion rate at .

[0041] According to the present disclosure, a method of manufacturing an electronic device may include:

[0042] Providing an imaging device as described above;

[0043] providing a distortion correction processor configured to perform a distortion correction process to correct distortion of the object image on the imaging sensor to generate a final target image; and

[0044] The imaging device and the distortion correction processor are assembled into an electronic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] These and / or other aspects and advantages of the embodiments of the present disclosure will become apparent and more readily understood from the following description made with reference to the accompanying drawings, in which:

[0046] Figure 1 is a schematic plan view of an electronic device equipped with an imaging device according to one embodiment of the present disclosure;

[0047] Figure 2 It is along Figure 1 A cross-sectional view taken along line II-II of an electronic device equipped with an imaging device;

[0048] Figure 3 shows the focal length f of the imaging device in the aberration-free case (ideal optical lens case);

[0049] Figure 4 showing the imaging sensor and the percentage of the image height on the imaging sensor;

[0050] Figure 5 shows the distortion curve of the optical lens in the case of no aberration (ideal optical lens case);

[0051] Figure 6shows the focal length f' of the imaging device under the condition of positive distortion aberration (actual optical lens condition);

[0052] Figure 7 showing the imaging sensor and the percentage of the image height on the imaging sensor;

[0053] Figure 8 shows the distortion curve of the optical lens under the condition of positive distortion aberration (the actual optical lens condition);

[0054] Figure 9 shows the decrease in sharpness of the object image (final target image) after the distortion correction process;

[0055] Figure 10 shows the focal length f and the focal length f' of the imaging device according to the present embodiment;

[0056] Figure 11 An imaging sensor and an image of an object overlaid with the imaging sensor are shown;

[0057] Figure 12 A distortion correction processor, an object image before distortion correction processing, and an object image after distortion correction processing (final target image) are shown;

[0058] Figure 13 An example of a distortion curve of the optical lens of the imaging device according to the present embodiment is shown (the distortion curve can be linearized by two linear lines);

[0059] Figure 14 Shows Figure 13 The conditions that the distortion curve represented in should meet;

[0060] Figure 15 shows another example of a distortion curve of the optical lens of the imaging device according to the present embodiment (the distortion curve can be linearized by two linear lines); and

[0061] Figure 16 Shown Figure 15 The distortion curve represented in should satisfy the conditions. DETAILED DESCRIPTION

[0062] Embodiments of the present disclosure will be described in detail, and examples of the embodiments will be illustrated in the accompanying drawings. Throughout the description, identical or similar elements and elements having identical or similar functions are represented by similar reference numerals. The embodiments described herein with reference to the accompanying drawings are illustrative and intended to illustrate the present disclosure, but should not be construed as limiting the present disclosure.

[0063] Figure 1 FIG. 1 shows an electronic device 10 according to one embodiment of the present disclosure. Figure 2 Shown along Figure 1This is a cross-sectional view of an electronic device taken along line II-II. In other words, Figure 1 The layout of a first side of electronic device 10 is shown.

[0064] like Figure 1 and 2 As shown, electronic device 10 may include imaging device 20 and distortion correction processor 22. In other words, imaging device 20 and distortion correction processor 22 are incorporated into electronic device 10. Imaging device 20 captures an image of an object to be imaged. Imaging device 20 may include protective glass 30, optical lens 40, and imaging sensor 50. In this embodiment, optical lens 40 may be composed of a single lens or a combination of multiple lenses.

[0065] Here, the first side of the imaging device 20 and the optical lens 40 indicates the side of the object to be imaged by the imaging device 20, and the second side of the imaging device 20 and the optical lens 40 indicates the side of the imaging sensor 50. The second side of the imaging device 20 and the optical lens 40 is opposite to the first side. Therefore, when the user of the electronic device 10 uses the electronic device 10 to obtain an object image of the object, the object is located on the first side of the imaging device 20 and the optical lens 40.

[0066] For example, the electronic device 10 may be a smartphone, a tablet computer, a notebook computer, etc. When designing the electronic device 10, the thickness of the electronic device 10 is mainly determined by the height H of the imaging device 20. imd Determine the height H of the imaging device 20 imd is mainly determined by the focal length f of the imaging device 20. Therefore, the thickness of the electronic device 10 is basically determined by the focal length f of the imaging device 20. In other words, a shorter focal length f can reduce the height H of the imaging device 20. imd , and the lower height H of the imaging device 20 imd The thickness of the electronic device 10 can be reduced.

[0067] The distortion correction processor 22 performs distortion correction processing to correct the distortion of the object image to generate a final target image, which is the object image that the user wants to capture. Although the electronic device 10 according to this embodiment includes the distortion correction processor 22, the distortion correction processor 22 may be omitted from the electronic device 10. In this case, the distortion correction processing is performed in another electronic device, such as a personal computer, a notebook computer, etc.

[0068] Figure 3 shows the focal length f of the imaging device 20 in the aberration-free case (ideal optical lens case); Figure 4 shows the imaging sensor 50 and the percentage of the image height H on the imaging sensor 50, and Figure 5 Shown Figure 3The distortion curve of the optical lens 40 is shown.

[0069] like Figure 3 As shown, the focal length f is the distance between the center of the optical lens 40 and the imaging sensor 50. Angle θ represents the angle between the central light input to the center of the optical lens 40 and the light input to the optical lens 40. Angle θ represents the angle between the central light passing through the center of the optical lens 40 and the light input to the optical lens 40, while angle θ' represents the angle between the central light passing through the center of the optical lens 40 and the light output from the optical lens 40. In an ideal optical lens, the angle θ of the light input to the optical lens 40 is equal to the angle θ' of the light output from the optical lens 40.

[0070] like Figure 4 As shown, the imaging sensor 50 may include M×N pixels, 0% H0 of the image height corresponds to the center of the imaging sensor 50, and 100% H 100 Corresponding to the corner C of the imaging sensor 50 IMG In this case, 100% of the image height H 100 is the center of the imaging sensor 50 and the corner C of the imaging sensor 50 IMG The length H between r In an ideal optical lens 40 , the object image of the object on the imaging sensor 50 is not distorted.

[0071] Therefore, if Figure 3 As shown, 100% of the image height H 100 and length H r It can be expressed as f×tanθ, or it can also be expressed as f×tanθ′, because in the ideal optical lens 40, tanθ is equal to tanθ′.

[0072] like Figure 5 As shown, the distortion curve of the ideal optical lens 40 is represented on a coordinate system, in which the X-axis is the distortion rate D and the Y-axis is the percentage of the image height H of the object image on the imaging sensor 50. In the distortion curve of the ideal optical lens 40, the distortion rate D is always 0%. That is, the distortion rate D0 at 0% H0 of the image height is 0%, and the distortion rate D0 at 100% H0 of the image height is 0%. 100 The distortion rate D 100 Also 0%.

[0073] Figure 6 shows the focal length f' of the imaging device 20 in the case of positive distortion aberration (actual optical lens case), Figure 7 shows the imaging sensor 50 and the percentage of the image height H on the plane of the imaging sensor 50, Figure 8 Shown as Figure 6 The distortion curve of the optical lens 40 is shown. Figure 6 、 Figure 7 and Figure 8 Corresponding to the above Figure 3 、 Figure 4 and Figure 5 .

[0074] like Figure 6 As shown, the focal length f is the distance between the center of the optical lens 40 and the imaging sensor 50. Angle θ also represents the angle between the central light input to the center of the optical lens 40 and the light input to the optical lens 40. Angle θ' also represents the angle between the central light passing through the center of the optical lens 40 and the light output from the optical lens 40. In an actual optical lens 40, due to aberrations of the optical lens 40, the angle θ of the light input to the optical lens 40 is not equal to the angle θ' of the light output from the optical lens 40. Figure 6 The illustrated example of optical lens 40 produces positive distortion aberration.

[0075] like Figure 7 As shown, the imaging sensor 50 may also include M×N pixels, 0% H0 of the image height corresponds to the center of the imaging sensor 50, but 100% H 100 corresponds to the outside of the imaging sensor 50. That is, due to the distortion of the object image, 100% of the image height H 100 does not correspond to the corner C of the imaging sensor 50 IMG .

[0076] Therefore, from 0% H0 of the image height to 100% H of the image height 100 The length does not correspond to the center of the imaging sensor 50 and the corner C of the imaging sensor 50. IMG The length H between r .

[0077] Therefore, if Figure 6 As shown, 100% of the image height H of the object image on the imaging sensor 50 plane 100 It is not expressed as f×tan θ but as f×tan θ′, where the angle θ′ is the angle between the central light and the light forming the corner of the object image on the plane of the imaging sensor 50 .

[0078] like Figure 8 As shown in FIG. 1 , in the distortion curve of the optical lens 40 of the actual optical lens, the distortion rate D gradually increases as the image height H increases. That is, the relationship between the distortion rate D and the image height H is curved as the image height H increases. Figure 8 In the example of the distortion curve shown, the distortion rate D0 at 0% H0 of the image height is 0%, but at 100% H 100 The distortion rate D 100A specific percentage.

[0079] The distortion of the object image must be corrected by the distortion correction process to obtain a natural object image (final target image). However, the sharpness of the object image corrected by the distortion correction process is reduced, as shown in FIG. Figure 9 shown.

[0080] exist Figure 9 In the image correction process, the central portion around the center of the corrected object image (final target image) is a region where sharpness decreases due to the distortion correction process. This is because, within a unit area of ​​the final target image, the amount of image information in the central portion of the object image is smaller than the amount of image information in the peripheral portion of the object image, which is outside the central portion of the object image.

[0081] As described above, in order to reduce the height H of the imaging device 20 imd Therefore, in the electronic device 10 of the present embodiment, the focal length f of the imaging device 20 is shortened to the focal length f'.

[0082] Figure 10 shows the focal length f' of the imaging device 20 according to the present embodiment, Figure 11 Object image 52 and object image 54 are shown overlaid with imaging sensor 50 .

[0083] like Figure 10 As shown, the focal length f' is shorter than the focal length f, so the height H of the imaging device 20 can be reduced. imd , and the imaging device 20 can be smaller. In other words, the optical lens 40 of the imaging device 20 according to the present embodiment is closer to the imaging sensor 50.

[0084] like Figure 11 As shown, with Figure 6 The optical lens 40 with the focal length f shown generates an object image 52, while the Figure 10 The optical lens 40, shown with a focal length f', generates an object image 54. The object image 52 is subjected to a distortion correction process to correct the distortion of the object image 52. Furthermore, the object image 54 is subjected to a distortion correction process to correct the distortion of the object image 54.

[0085] The distortion-corrected object image 52 is wider than the distortion-corrected object image 54. In other words, the object image 52 is wider than the imaging sensor 50, while the object image 54 is within the size range of the imaging sensor 50.

[0086] More specifically, there are four corners 54a in the object image 54, and there are four corners 50a in the imaging sensor 50. Each of the corners 54a of the object image 54 is located at each of the corners 50a of the imaging sensor 50. That is, the four corners 54a of the object image 54 are located at the four corners 50a of the imaging sensor 50, respectively.

[0087] Therefore, 100% of the image height H of the object image 54 100 The position of is located at the corner 50 a of the imaging sensor 50 .

[0088] There are four edges 54 b between corners 54 a of an object image 54 on the imaging sensor 50. The four edges 54 b of the object image 54 are determined based on the corners 54 a of the object image 54 at the corners 50 a of the imaging sensor 50. In this embodiment, the optical lens 40 produces pincushion distortion. Therefore, each of the four edges 54 b is curved inward, and the four edges 54 b are also within the size range of the imaging sensor 50.

[0089] In this embodiment, light passing through the optical lens 40 can reach the outer region of the object image 54. Therefore, both the inner region within the object image 54 and the outer region outside the object image 54 are subjected to the distortion correction process, and the outer region is cut off to create a final target image without the distortion of the inner region of the object image 54.

[0090] Alternatively, the distortion correction process may be applied only to the inner region of the object image 54. That is, the inner region inside the object image 54 is bounded by four edges 54 b, and the distortion correction process is performed on the inner region of the object image 54 to correct the distortion of the object image 54. Alternatively, the outer region of the object image 54 may be cut off before the distortion correction process.

[0091] like Figure 10 and Figure 11 As shown, 100% H of the image height of the object image 54 100 Expressed as f′×tanθ″, where angle θ″ is the angle between the central light and the light forming the corner 54a of the object image 54 on the plane of the imaging sensor 50. The angle between the central light and the light forming the edge 54b (not the corner 54a) is smaller than angle θ″. In other words, angle θ″ is the maximum angle between the central light and the light forming the corner 54a and edge 54b of the object image 54 on the plane of the imaging sensor 50.

[0092] Figure 12 The distortion correction processor 22 , the object image 54 before the distortion correction process, and the object image 54 after the distortion correction process (the final target image that the user wants to obtain) are shown.

[0093] like Figure 12 As shown, the distortion correction processor 22 performs a distortion correction process for the object image 54. Before the distortion correction process, the object image 54 is distorted so that edges 54b of the object image 54 are bent inward.

[0094] Therefore, the distortion correction processor 22 stretches the object image 54 to correct the distortion of the object image 54 and generates a final target image. More specifically, the distortion correction processor 22 stretches the object image 54 outward in the distortion correction process. That is, the object image 54 extends outward on all sides.

[0095] The distortion correction processor 22 stretches the object image 54 according to, for example, bicubic interpolation, bilinear interpolation, etc. However, the distortion correction processor 22 may stretch the object image 54 according to other methods.

[0096] After the distortion correction process is applied to the object image 54 , the distortion of the object image 54 is substantially eliminated, so that the edge 54 b of the object image 54 becomes substantially straight.

[0097] However, as regards Figure 9 As explained, the central portion of the object image 54 degrades due to the distortion correction process. The central portion of the object image 54 is most important to the user of the electronic device 10 because the region of interest is generally located around the center of the object image 54. Here, the sharpness of the object image 54 decreases relative to the distortion curve of the optical lens 40. Therefore, in order to improve and suppress the degradation of the object image, the optical lens 40 of the imaging device 20 of this embodiment has a specific distortion curve.

[0098] Figure 13 An example of a distortion curve DC of the optical lens 40 of the imaging device 20 according to the present embodiment is shown. Figure 14 Shows Figure 13 The distortion curve DC shown in should satisfy the conditions. Figure 14 Five conditions, namely, conditions 1 to 5, are shown, but the optical lens 40 does not necessarily have to satisfy all of the five conditions 1 to 5. That is, the optical lens 40 may satisfy one, two, three, or four of the five conditions 1 to 5.

[0099] like Figure 13 and Figure 14 As shown in FIG14 , the distortion curve DC of the optical lens 40 is represented in a coordinate system, where the X-axis of the coordinate system is the distortion rate D of the object image 54 , and the Y-axis of the coordinate system is the percentage of the image height H of the object image on the plane of the imaging sensor 50 .

[0100] The minimum percentage of the image height H0 is 0, and it is located at the origin of the coordinate system. The maximum percentage of the image height H 1000% H0 of the image height corresponds to the center of the object image 54, while 100% H0 of the image height corresponds to the center of the object image 54. 100 Corresponds to corner 54 a of object image 54 on the plane of imaging sensor 50 .

[0101] In addition, the minimum value of the distortion rate D0 is 0, and it is located at the origin of the coordinate system. 100 The maximum value of depends on the characteristics of the optical lens 40. The distortion rate D0 represents the distortion rate of the center of the object image 54. 100 Indicates the distortion rate of the corner 54 a of the object image 54 .

[0102] In this embodiment, the distortion rate D is expressed as (AD-PD) / PD×100%. The predicted distance PD represents the distance from the center of the object image to the ideal point where the object should be imaged. The actual distance AD ​​represents the distance from the center of the object image to the actual point where the object is actually imaged.

[0103] By the way, Figure 13 The distortion curve DC shown represents the design characteristics of the optical lens 40 or the characteristics of the actual optical lens 40. That is, the characteristics of the mass-produced optical lenses 40 are not the same, and each has its own characteristics. Therefore, 1) Figure 13 The distortion curve DC in can be regarded as the design characteristic of the optical lens 40. 2) Figure 13 The distortion curve DC in can be regarded as the characteristic of each mass-produced optical lens 40, or 3) Figure 13 The distortion curve DC in can be regarded as an average value of the characteristics of the mass-produced optical lens 40. Therefore, the following description can be applied to any kind of distortion curve DC.

[0104] The distortion curve DC of the optical lens 40 of the imaging device 20 according to the present embodiment satisfies any combination of the following conditions 1 to 5.

[0105] <Condition 1>

[0106] The distortion curve DC can be linearized and approximated by two or more straight lines in the coordinate system. Figure 13 In the example shown, the distortion curve DC can be linearized and approximated using two linear lines. Specifically, the distortion curve DC can be linearized and approximated using a first linear line L1 and a second linear line L2. The first linear line L1 approximates the lower portion of the image height H of the distortion curve DC, while the second linear line L2 approximates the upper portion of the image height H of the distortion curve DC.

[0107] For example, the first linear line L1 and the second linear line L2 can be calculated and determined by the least square method (ie, linear approximation method). Of course, other methods for calculating and determining the first straight line L1 and the second straight line L2 can be used.

[0108] <Condition 2>

[0109] The angle α1 is greater than the angle α2, wherein the angle α1 is the angle formed by the first linear line L1 and the X-axis of the coordinate system, and the angle α2 is the angle formed by the second linear line L2 and the X-axis of the coordinate system.

[0110] If the distortion curve DC satisfies condition 2, then because the distortion rate D of the first linear line L1 is smaller than the distortion rate of the second linear line L2, the sharpness of the central portion of the object image can be improved. In other words, the distortion curve DC at the lower portion of the image height H is steeper than the distortion curve DC at the higher portion of the image height H. The steeper distortion curve DC at the lower portion of the image height H improves the sharpness of the central portions of the object image and the final target image, thereby suppressing a decrease in the sharpness of the object image and the final target image.

[0111] <Condition 3>

[0112] Distortion rate D A Less than D 100 ×(H A / H 100 ). Here, the distortion rate D A is the X coordinate of the intersection of the first linear line L1 and the second linear line L2, and the image height H A The percentage H is the Y coordinate of the intersection of the first linear line L1 and the second linear line L2. 100 is 100%, the distortion rate D 100 100% of the image height H 100 The distortion rate at .

[0113] If the distortion curve satisfies condition 3, then the distortion rate D at the intersection of the first linear line L1 and the second linear line L2 is A Small enough to improve the sharpness of the central part of the object image and the final destination image.

[0114] <Condition 4>

[0115] Image height H A The percentage is equal to or greater than 20% and equal to or less than 50%. Here also, the image height H A The percentage is the Y coordinate of the intersection of the first linear line L1 and the second linear line L2.

[0116] If the distortion curve satisfies condition 4, then since the distortion curve DC from 0% to 20% and 50% of the image height H can be linearized and approximated by the first linear line L1, the sharpness of the central part of the object image and the final target image can be improved, and the first linear line limits the sharpness of the central part of the object image and the final target image.

[0117] In this embodiment, if the image height H A If the percentage is less than 20%, the fine and clear area of ​​the object image is too small for the user. On the other hand, if the image height H A If the percentage of is greater than 50%, it is difficult for designers and engineers to design the optical lens 40 with a short focal length f'.

[0118] <Condition 5>

[0119] 100% H of the image height of the object image in the optical lens 100 The distortion rate D 100 Equal to or greater than 5% and equal to or less than D NM Here, D NM =4×L / 1000, L=((1 / 2×M) 2 +(1 / 2×N) 2 ) 1 / 2 , M is the number of pixels in the vertical direction of the imaging sensor 50 , and N is the number of pixels in the horizontal direction of the imaging sensor 50 .

[0120] In Condition 5, L represents the number of pixels in half of the diagonal line of the imaging sensor 50, that is, along the line from 0% H0 of the image height of the object image on the imaging sensor 50 to 100% H 100 The value 4 is to adjust D NM A factor that defines a reasonable and appropriate maximum value for the distortion rate D.

[0121] For example, if M is 3000 pixels and N is 4000 pixels, then L = ((1500 2 )+(2000 2 )) 1 / 2 =2500, D NM =4×2500 / 1000=10%. That is, according to this example, D NM The maximum value is 10%.

[0122] If the optical lens 40 is located closer to the imaging sensor 50, the distortion rate D of the object image on the imaging sensor 50 increases. On the contrary, if the design of the optical lens 40 can accept a larger distortion rate D value, the optical lens 40 can be located closer to the imaging sensor 50, and it can make the height H of the imaging device 20imd Decrease.

[0123] Therefore, if it is acceptable that the distortion rate D is equal to or greater than 5%, the height H of the imaging device 20 can be reduced compared to the conventional imaging device. imd .

[0124] However, if the distortion rate D is too large, it is impossible to correct the distortion of the object image on the imaging sensor 50 by the distortion correction processing in the distortion correction processor 22. Therefore, in Condition 5 of the present embodiment, the maximum distortion rate D is NM By D NM =4×L / 1000, where L=((1 / 2×M) 2 +(1 / 2×N) 2 ) 1 / 2 .

[0125] Although Figure 13 The distortion curve DC shown can be linearized and approximated by two linear lines L1 and L2, but the distortion curve DC can be linearized and approximated by three or more linear lines. An example in which the distortion curve DC can be linearized and approximated by three linear lines will be explained below.

[0126] Figure 15 An example of a distortion curve DC of the optical lens 40 is shown, wherein the distortion curve DC can be approximated by three linear lines. Figure 16 Shows Figure 15 The distortion curve DC shown in should satisfy the conditions. Figure 15 and Figure 16 Corresponding to Figure 13 and Figure 14 .

[0127] Figure 15 The distortion curve DC shown satisfies any combination of the following conditions 1-5.

[0128] <Condition 1>

[0129] The distortion curve DC can be linearized and approximated by three linear lines L1, L2, and L3. That is, the distortion curve DC can be linearized and approximated by a first linear line L1, a second linear line L2, and a third linear line L3. The first linear line L1 approximates the lower portion of the image height H of the distortion curve DC, the second linear line L2 approximates the middle portion of the image height H of the distortion curve DC, and the third linear line L3 approximates the upper portion of the image height H of the distortion curve DC.

[0130] <Condition 2>

[0131] Angle α1 is greater than angle α2, and angle α2 is greater than angle α3. Here, angle α1 is the angle formed by the first linear line L1 and the X-axis of the coordinate system, angle α2 is the angle formed by the second linear line L2 and the X-axis of the coordinate system, and angle α3 is the angle formed by the third linear line L3 and the X-axis of the coordinate system.

[0132] If the distortion curve DC satisfies condition 2, then because the distortion rate D of the first linear line L1 is smaller than the distortion rate D of the second linear line L2, and the distortion rate D of the second linear line L2 is smaller than the distortion rate D of the third linear line L3, the sharpness of the central portion of the object image can be improved. In other words, the distortion curve DC at the lower portion of the image height H is steeper than the distortion curve DC at the middle portion of the image height H, and the distortion curve DC at the middle portion of the image height H is steeper than the distortion curve DC at the higher portion of the image height H. The steeper distortion curve DC at the lower portion of the image height H improves the sharpness of the central portion of the object image and the final target image, thereby suppressing a decrease in the sharpness of the object image and the final target image.

[0133] <Condition 3>

[0134] Distortion rate D A is the X coordinate of the intersection of the first linear line L1 and the second linear line L2, the distortion rate D B is the X coordinate of the intersection of the second linear line L2 and the third linear line L3, and the image height H A The percentage is the Y coordinate of the intersection of the first linear line and the second linear line, and the image height H B The percentage H is the Y coordinate of the intersection of the second linear line and the third linear line. 100 is 100%, the distortion rate D 100 is 100% of the image height H 100 The distortion rate at , the distortion rate D A Less than D 100 ×(H A / H 100 ), distortion rate D B Less than D 100 ×(H B / H 100 ).

[0135] If the distortion curve satisfies condition 3, then due to the distortion rate D A Much smaller than the distortion rate D B , which can improve the sharpness of the central part of the object image and the final target image.

[0136] <Condition 4>

[0137] Here too, the percentage H Ais the Y coordinate of the intersection of the first linear line L1 and the second linear line L2, and the percentage H A Equal to or greater than 20% and equal to or less than 50%. In addition, the percentage H B is the Y coordinate of the intersection of the second linear line L2 and the third linear line L3, and the percentage H B Equal to or greater than 70% and equal to or less than 90%.

[0138] If the distortion curve satisfies condition 4, then since the distortion curve DC from 0% to between 20% and 50% of the image height H can be linearized and approximated by the first linear line L1, and the distortion curve DC from between 20% and 50% to between 70% and 90% of the image height H can be linearized and approximated by the second linear line L2, the sharpness of the central part of the object image and the final target image can be improved. The first linear line defines the sharpness of the central part of the object image and the final target image, and the second linear line defines the sharpness of the middle part of the object image and the final target image.

[0139] <Condition 5>

[0140] Figure 15 Condition 5 of the distortion curve in Figure 13 That is, at 100% H of the image height of the object image of the optical lens 40 100 The distortion rate D 100 Equal to or greater than 5% and equal to or less than D NM Here, D NM =4×L / 1000, L=((1 / 2×M) 2 +(1 / 2×N) 2 ) 1 / 2 , M is the number of pixels in the vertical direction of the imaging sensor 50 , and N is the number of pixels in the horizontal direction of the imaging sensor 50 .

[0141] As described above, according to the imaging device 20 of the electronic device 10 of this embodiment, since the focal length f' can be shortened, the height H of the imaging device 20 can be reduced. imd Therefore, the thickness of the electronic device 10 including the imaging device 20 can also be reduced.

[0142] In addition, since the height H of the imaging device 20 can be reduced imd , therefore, the projection portion of the imaging device 20 of the electronic device 10 can be eliminated, and a thin electronic device 10 can be realized. In other words, the electronic device 10 can be designed to have a full plane.

[0143] Furthermore, even if a larger-sized imaging sensor 50 is used, the height H of the imaging device 20 can still be reduced because the focal length f' can be shortened compared to conventional imaging devices.imd Therefore, a larger size imaging sensor 50 can be equipped with the electronic device 10, and the quality of the object image and the final target image can be improved.

[0144] In the description of the embodiments of the present disclosure, it should be understood that terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and "clockwise" and "counterclockwise" should be interpreted as referring to directions or positions described or shown in the drawings in question. These relative terms are used only to simplify the description of the present disclosure and do not indicate or imply that the device or element mentioned must have a specific orientation, or be constructed or operated in a specific orientation. Therefore, these terms should not be used to limit the present disclosure.

[0145] In addition, terms such as "first" and "second" are used herein for descriptive purposes and are not intended to indicate or imply relative importance or degree of importance, or to imply the number of technical features indicated. Therefore, features defined with "first" and "second" may include one or more of the features. In the description of the present disclosure, "at least two" means two or more, unless otherwise specified.

[0146] In the description of the embodiments of the present disclosure, unless otherwise specified or limited, the terms "installed", "connected", "coupled", etc. are widely used, and can be, for example, a fixed connection, a detachable connection or an integral connection, or a mechanical or electrical connection, or a direct connection or indirect connection through an intermediate structure, or an internal communication between two components, which can be understood by those skilled in the art according to the specific circumstances.

[0147] In the embodiments of the present disclosure, unless otherwise specified or limited, a structure in which a first feature is located "above" or "below" a second feature may include an embodiment in which the first feature is in direct contact with the second feature, or an embodiment in which the first feature is not in direct contact with the second feature but is in contact with the second feature via an additional feature formed therebetween. In addition, a first feature being "above," "above," or "on top of" a second feature may include an embodiment in which the first feature is directly opposite or obliquely "above," "above," or "on top of" the second feature, or may simply mean that the height of the first feature is higher than the height of the second feature.

[0148] The first feature being "below", "beneath" or "at the bottom" of the second feature may include embodiments where the first feature is "below", "beneath" or "at the bottom" of the second feature, or may simply mean that the height of the first feature is lower than the height of the second feature.

[0149] Various embodiments and examples are provided in the above description to implement different structures of the present disclosure. In order to simplify the present disclosure, certain elements and settings are described above. However, these elements and settings are only examples and are not intended to limit the present disclosure. In addition, reference numbers and / or reference letters may be repeated in different examples of the present disclosure. This repetition is for simplicity and clarity, and does not refer to the relationship between different embodiments and / or settings. In addition, the present disclosure provides examples of different processes and materials. However, those skilled in the art will understand that other processes and / or materials may also be applied.

[0150] Throughout this specification, references to “an embodiment,” “some embodiments,” “exemplary embodiment,” “example,” “specific example,” or “some examples” mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. Therefore, the appearance of these phrases throughout this specification does not necessarily refer to the same embodiment or example of the present disclosure. Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0151] Any process or method described in a flowchart or otherwise described herein may be understood to include one or more modules, segments, or portions of code that include executable instructions for implementing specific logical functions or steps in the process, and the scope of the preferred embodiments of the present disclosure includes other implementations, wherein those skilled in the art will understand that the functions may be implemented in an order other than that shown or discussed, including in substantially the same order or in reverse order.

[0152] The logic and / or steps described in other ways herein or shown in flowcharts, for example, a specific sequence of executable instructions for implementing a logical function, may be embodied in any computer-readable medium, which may be used by an instruction execution system, apparatus, or device (e.g., a computer-based system, including a processor or other system that can retrieve instructions from an instruction execution system, apparatus, or device and execute the instructions), or by a combination of an instruction execution system, apparatus, or device. For purposes of this specification, a "computer-readable medium" may be any device suitable for containing, storing, communicating, propagating, or transmitting information for use by an instruction execution system, apparatus, or device, or for use in conjunction with an instruction execution system, apparatus, or device. More specific examples of computer-readable media include, but are not limited to, an electronic connection having one or more wires (electronic devices), a portable computer housing (magnetic devices), random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), fiber optic devices, and portable compact disk read-only memory (CDROM). Furthermore, the computer-readable medium may even be paper or other suitable medium on which the program can be printed, because, for example, when the program must be obtained electronically, the paper or other suitable medium can be optically scanned and then edited, decrypted or processed using other suitable methods if necessary, and the programs can then be stored in a computer memory.

[0153] It should be understood that each part of the present disclosure can be implemented by hardware, software, firmware or a combination thereof. In the above embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by an appropriate instruction execution system. For example, if implemented by hardware, in another embodiment, the steps or methods can be implemented by one or a combination of the following technologies known in the art: a discrete logic circuit having a logic gate circuit for implementing the logical function of a data signal, a dedicated integrated circuit having an appropriate combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0154] Those skilled in the art will appreciate that all or part of the steps in the exemplary methods of the present disclosure may be implemented by using program commands to related hardware. These programs may be stored in a computer-readable storage medium, and when executed on a computer, these programs include one or more steps in the method embodiments of the present disclosure.

[0155] In addition, each functional unit of the embodiment of the present disclosure can be integrated into the processing module, or these units can be physically separate, or two or more units can be integrated into the processing module. The integrated module can be implemented in the form of a hardware or software functional module. When the integrated module is implemented in the form of a software functional module and sold or used as an independent product, the integrated module can be stored in a computer-readable storage medium.

[0156] The above storage medium may be a read-only memory, a disk, a CD, etc.

[0157] While embodiments of the present disclosure have been shown and described, those skilled in the art will understand that these embodiments are illustrative and are not to be construed as limiting the present disclosure, and that changes, modifications, substitutions, and variations may be made in the embodiments without departing from the scope of the present disclosure.

Claims

1. An imaging device, characterized in that include: an optical lens, wherein an object to be imaged is located on a first side of the optical lens; and An imaging sensor is located on a second side of the optical lens, the second side being an opposite side of the first side of the optical lens, wherein 100% of the image height H of the object image 100 The position is located at the corner of the imaging sensor, 0% H0 of the image height of the object image corresponds to the center of the imaging sensor, and 100% H 100 The distortion rate D 100 is a specific percentage, the distortion rate D0 at 0% H0 of the image height of the object image is 0%, wherein the object image on the imaging sensor is subjected to distortion correction processing to generate a final target image, Wherein, the optical lens produces pincushion distortion, The edges of the final target image are determined based on the corners of the object image at the corners of the imaging sensor, and When generating the final target image, cutting out the outer region of the object image outside the final target image, wherein 100% H of the image height of the object image of the optical lens 100 The distortion rate D 100 Equal to or greater than 5% and equal to or less than D NM ,in, D NM =4×L / 1000, L=((1 / 2×M) 2 +(1 / 2×N) 2 ) 1 / 2 , M is the number of pixels in the vertical direction of the imaging sensor, and N is the number of pixels in the horizontal direction of the imaging sensor.

2. The imaging device according to claim 1, wherein The distortion curve of the optical lens represented in the coordinate system is linearized by two or more linear lines, wherein the X-axis of the coordinate system is the distortion rate D, and the Y-axis of the coordinate system is the percentage of the image height H of the object image on the imaging sensor.

3. The imaging device according to claim 2, wherein The linear line consists of a first linear line and a second linear line, wherein the first linear line approximates a lower portion of the image height of the distortion curve in the coordinate system, and the second linear line approximates a higher portion of the image height of the distortion curve in the coordinate system.

4. The imaging device according to claim 3, wherein Angle α1 is greater than angle α2, wherein angle α1 is an angle formed by the first linear line and the X-axis of the coordinate system, and angle α2 is an angle formed by the second linear line and the X-axis of the coordinate system.

5. The imaging device according to claim 3, wherein Image height H A The percentage is the Y coordinate of the intersection of the first linear line and the second linear line, and the image height H A The percentage is equal to or greater than 20% and equal to or less than 50%.

6. The imaging device according to claim 3, wherein Distortion rate D A is the X coordinate of the intersection of the first linear line and the second linear line, and the image height H A The percentage is the Y coordinate of the intersection of the first linear line L1 and the second linear line L2, and the distortion rate D A Less than D 100 ×(H A / H 100 ), where percentage H 100 is 100%, the distortion rate D 100 is 100% of the image height H 100 The distortion rate at .

7. The imaging device according to claim 2, wherein The linear line consists of a first linear line, a second linear line, and a third linear line, wherein the first linear line approximates a lower portion of the image height of the distortion curve, the second linear line approximates a middle portion of the image height of the distortion curve, and the third linear line approximates a higher portion of the image height of the distortion curve.

8. The imaging device according to claim 7, wherein Angle α1 is greater than angle α2, and angle α2 is greater than angle α3, wherein angle α1 is the angle formed by the first linear line and the X-axis of the coordinate system, angle α2 is the angle formed by the second linear line and the X-axis of the coordinate system, and angle α3 is the angle formed by the third linear line and the X-axis of the coordinate system.

9. The imaging device according to claim 7, wherein Image height H A The percentage is the Y coordinate of the intersection of the first linear line and the second linear line, and the image height H A The percentage is equal to or greater than 20% and equal to or less than 50%, and Image height H B The percentage is the Y coordinate of the intersection of the second linear line and the third linear line, and the image height H B The percentage is equal to or greater than 70% and equal to or less than 90%.

10. The imaging device according to claim 7, wherein Distortion rate D A is the X coordinate of the intersection of the first linear line and the second linear line, and the distortion rate D B is the X coordinate of the intersection of the second linear line and the third linear line, and the image height H A The percentage is the Y coordinate of the intersection of the first linear line and the second linear line, and the image height H B The percentage is the Y coordinate of the intersection of the second linear line and the third linear line, the distortion rate D A Less than D 100 ×(H A / H 100 ), and the distortion rate D B Less than D 100 ×(H B / H 100 ), wherein the image height H 100 The percentage is 100%, the distortion rate D 100 is 100% of the image height H 100 The distortion rate at .

11. An electronic device, characterized in that: include: The imaging device according to any one of claims 1 to 10; as well as The distortion correction processor is configured to perform a distortion correction process to correct the distortion of the object image on the imaging sensor to generate a final target image.

12. A method for manufacturing an imaging device, characterized in that: include: providing support structures; Providing optical lenses; providing imaging sensors; as well as Assembling the support member, the optical lens, and the imaging sensor so that the object to be imaged is located on a first side of the optical lens, and the imaging sensor is located on a second side of the optical lens, the second side being an opposite side of the first side of the optical lens, wherein 100% of the image height H of the object image 100 The position is located at the corner of the imaging sensor, 0% H0 of the image height of the object image corresponds to the center of the imaging sensor, and 100% H 100 The distortion rate D 100 is a specific percentage, the distortion rate D0 at 0% H0 of the image height of the object image is 0%, wherein the object image on the imaging sensor is subjected to distortion correction processing to generate a final target image, Wherein, the optical lens produces pincushion distortion, The edges of the final target image are determined based on the corners of the object image at the corners of the imaging sensor, and When generating the final target image, cutting out the outer region of the object image outside the final target image, Wherein, 100% H of the image height of the object image on the imaging sensor of the optical lens 100 The distortion rate D 100 Equal to or greater than 5% and equal to or less than D NM ,in, D NM =4×L / 1000, L=((1 / 2×M) 2 +(1 / 2×N) 2 ) 1 / 2 , M is the number of pixels in the vertical direction of the imaging sensor, and N is the number of pixels in the horizontal direction of the imaging sensor.

13. The method according to claim 12, characterized in that The distortion curve of the optical lens represented in the coordinate system is linearized by two or more linear lines, wherein the X-axis of the coordinate system is the distortion rate D, and the Y-axis of the coordinate system is the percentage of the image height H of the object image on the imaging sensor.

14. The method according to claim 13, characterized in that The linear line consists of a first linear line and a second linear line, wherein the first linear line approximates a lower portion of the image height of the distortion curve in the coordinate system, and the second linear line approximates a higher portion of the image height of the distortion curve in the coordinate system.

15. The method according to claim 14, characterized in that Angle α1 is greater than angle α2, wherein angle α1 is an angle formed by the first linear line and the X-axis of the coordinate system, and angle α2 is an angle formed by the second linear line and the X-axis of the coordinate system.

16. The method according to claim 14, characterized in that Image height H A The percentage is the Y coordinate of the intersection of the first linear line and the second linear line, and the image height H A The percentage is equal to or greater than 20% and equal to or less than 50%.

17. The method according to claim 14, characterized in that Distortion rate D A is the X coordinate of the intersection of the first linear line and the second linear line, and the image height H A The percentage is the Y coordinate of the intersection of the first linear line L1 and the second linear line L2, and the distortion rate D A Less than D 100 ×(H A / H 100 ), where percentage H 100 is 100%, the distortion rate D 100 is the image height H 100 The distortion rate at 100%.

18. The method according to claim 13, characterized in that The linear line consists of a first linear line, a second linear line, and a third linear line, wherein the first linear line approximates a lower portion of the image height of the distortion curve, the second linear line approximates a middle portion of the image height of the distortion curve, and the third linear line approximates a higher portion of the image height of the distortion curve.

19. The method according to claim 18, characterized in that Angle α1 is greater than angle α2, and angle α2 is greater than angle α3, wherein angle α1 is the angle formed by the first linear line and the X-axis of the coordinate system, angle α2 is the angle formed by the second linear line and the X-axis of the coordinate system, and angle α3 is the angle formed by the third linear line and the X-axis of the coordinate system.

20. The method according to claim 18, wherein Image height H A The percentage is the Y coordinate of the intersection of the first linear line and the second linear line, and the image height H A The percentage is equal to or greater than 20% and equal to or less than 50%, and Image height H B The percentage is the Y coordinate of the intersection of the second linear line and the third linear line, and the image height H B The percentage is equal to or greater than 70% and equal to or less than 90%.

21. The method according to claim 18, wherein Distortion rate D A is the X coordinate of the intersection of the first linear line and the second linear line, and the distortion rate D B is the X coordinate of the intersection of the second linear line and the third linear line, and the image height H A The percentage is the Y coordinate of the intersection of the first linear line and the second linear line, and the image height H B The percentage is the Y coordinate of the intersection of the second linear line and the third linear line, the distortion rate D A Less than D 100 ×(H A / H 100 ), and the distortion rate D B Less than D 100 ×(H B / H 100 ), wherein the image height H 100 The percentage is 100%, the distortion rate D 100 is 100% of the image height H 100 The distortion rate at .

22. A method for manufacturing an electronic device, characterized in that: include: A method for manufacturing an imaging device according to any one of claims 12 to 21 is provided; providing a distortion correction processor configured to perform a distortion correction process to correct the distortion of the object image on the imaging sensor to generate a final target image; as well as The imaging device and the distortion correction processor are assembled into the electronic device.

Images