Lens focusing system, lens focusing method, and graph display structure

Abstract

The present application discloses a lens focusing system, a lens focusing method and a chart display structure. The lens focusing system comprises a subject carrying device, a lens position pre-judging device and a lens position adjusting device. The subject carrying device is used for carrying an image extraction module. The image extraction module comprises a lens structure and an image sensing chip. The lens position pre-judging device comprises a chart display structure. The chart display structure is used for providing a physical measurement distance and an image measurement distance. Thus, according to the comparison between the physical measurement distance and the image measurement distance, the lens structure can gradually move towards the direction of approaching or moving away from the image sensing chip until the actual distance between the optical center point of the lens structure and the image sensing chip is equal to the lens focal length of the lens structure.

Description

Technical Field

[0001] This invention relates to a focusing system, a focusing method, and a display structure, and more particularly to a lens focusing system, a lens focusing method, and a chart display structure. Background Technology

[0002] In existing technologies, the image extraction module includes a lens holder and a lens assembly, and the lens assembly needs to be pre-focused before it can be fixed on the lens holder. However, the focusing system and focusing method of the lens assembly in existing technologies still have room for improvement. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a lens focusing system, a lens focusing method, and a chart display structure to address the shortcomings of the prior art.

[0004] To address the aforementioned technical problems, one technical solution adopted by this invention is to provide a lens focusing system, comprising a test object carrier, a lens position prediction device, and a lens position adjustment device. The test object carrier carries an image extraction module, which includes a lens support, a lens structure movably mounted on the lens support, and an image sensing chip corresponding to the lens structure. The lens position prediction device includes a chart display structure. The lens position adjustment device is used to rotatably adjust the distance between the lens structure and the image sensing chip. The chart display structure includes a first physical chart and a second physical chart separated from each other, with a first physical reference point of the first physical chart and a second physical reference point of the second physical chart separated by a physical measurement distance. When the image sensing chip, in conjunction with the lens structure, extracts both the first and second physical charts of the chart display structure to obtain chart image information, the chart image information provides a first image chart corresponding to the first physical chart and a second image chart corresponding to the second physical chart, with a first image reference point of the first image chart and a second image reference point of the second image chart separated by an image measurement distance. When the image measurement distance obtained by the image sensing chip in conjunction with the lens structure is greater than the physical measurement distance, because the actual distance between the optical center point of the lens structure and the image sensing chip is greater than the focal length of the lens structure, the lens structure is adjusted by rotating the lens position adjustment device to gradually move towards the image sensing chip until the actual distance between the optical center point of the lens structure and the image sensing chip equals the focal length of the lens structure. Conversely, when the image measurement distance obtained by the image sensing chip in conjunction with the lens structure is less than the physical measurement distance, because the actual distance between the optical center point of the lens structure and the image sensing chip is less than the focal length of the lens structure, the lens structure is adjusted by rotating the lens position adjustment device to gradually move away from the image sensing chip until the actual distance between the optical center point of the lens structure and the image sensing chip equals the focal length of the lens structure.

[0005] To address the aforementioned technical problems, another technical solution adopted by the present invention is to provide a lens focusing method, comprising: providing a chart display structure, the chart display structure including a first physical chart and a second physical chart separated from each other, wherein a first physical reference point of the first physical chart and a second physical reference point of the second physical chart are separated by a physical measurement distance; using an image sensing chip in conjunction with a lens structure to extract both the first physical chart and the second physical chart of the chart display structure to obtain chart image information, the chart image information being used to provide a first image chart corresponding to the first physical chart and a second image chart corresponding to the second physical chart, wherein a first image reference point of the first image chart and a second image reference point of the second image chart are separated by an image measurement distance; and, based on a comparison of the physical measurement distance and the image measurement distance, gradually moving the lens structure toward or away from the image sensing chip until an optical center point of the lens structure is at an actual distance from the image sensing chip equal to a lens focal length of the lens structure. When the image measurement distance obtained by the image sensing chip and lens structure is greater than the physical measurement distance, because the actual distance between the optical center point of the lens structure and the image sensing chip is greater than the lens focal length, the lens structure is rotated to gradually move closer to the image sensing chip until the actual distance between the optical center point of the lens structure and the image sensing chip equals the lens focal length. Conversely, when the image measurement distance obtained by the image sensing chip and lens structure is less than the physical measurement distance, because the actual distance between the optical center point of the lens structure and the image sensing chip is less than the lens focal length, the lens structure is rotated to gradually move away from the image sensing chip until the actual distance between the optical center point of the lens structure and the image sensing chip equals the lens focal length.

[0006] To solve the above-mentioned technical problems, another technical solution adopted by the present invention is to provide a chart display structure, which includes a chartless bottom layer, a first entity chart and a second entity chart, wherein the first entity chart and the second entity chart are set on the chartless bottom layer, so that there are no charts around the first entity chart, around the second entity chart and between the first entity chart and the second entity chart.

[0007] One of the beneficial effects of the present invention is that the lens focusing system provided by the present invention, through the technical solutions of "a test object carrying device for carrying an image extraction module, and the image extraction module including a lens bracket, a lens structure movably disposed on the lens bracket, and an image sensing chip corresponding to the lens structure", "a lens position prediction device including a chart display structure, and the chart display structure including a first physical chart and a second physical chart separated from each other, and a first physical reference point of the first physical chart and a second physical reference point of the second physical chart being separated by a physical measurement distance", and "a lens position adjustment device for rotatably adjusting the distance between the lens structure and the image sensing chip", enables the lens structure to gradually move towards the image sensing chip when the image measurement distance obtained by the image sensing chip in conjunction with the lens structure is greater than the physical measurement distance, and when the image measurement distance obtained by the image sensing chip in conjunction with the lens structure is less than the physical measurement distance, the lens structure to gradually move away from the image sensing chip through the rotation adjustment of the lens position adjustment device.

[0008] Another beneficial effect of the present invention is that the lens focusing method provided by the present invention can achieve the following: "Providing a chart display structure, the chart display structure including a first entity chart and a second entity chart separated from each other, wherein a first entity reference point of the first entity chart and a second entity reference point of the second entity chart are separated by a physical measurement distance"; "Using an image sensing chip in conjunction with a lens structure to extract both the first entity chart and the second entity chart of the chart display structure to obtain chart image information, the chart image information is used to provide a first image chart corresponding to the first entity chart and a second image chart corresponding to the second entity chart, wherein a first image reference point of the first image chart and a second image reference point of the second image chart are separated by an image measurement distance". The technical solution involves "moving the lens structure gradually toward the image sensor chip or away from it based on a comparison between the physical measurement distance and the image measurement distance, until an optical center point of the lens structure is at a distance from the image sensor chip equal to a lens focal length of the lens structure". This allows the lens structure to be adjusted by rotating the lens position adjustment device when the image measurement distance obtained by the image sensor chip in conjunction with the lens structure is greater than the physical measurement distance, so that the lens structure gradually moves toward the image sensor chip. Conversely, when the image measurement distance obtained by the image sensor chip in conjunction with the lens structure is less than the physical measurement distance, the lens structure can be adjusted by rotating the lens position adjustment device, so that the lens structure gradually moves away from the image sensor chip.

[0009] Another beneficial effect of the present invention is that the chart display structure provided by the present invention can be applied to the lens focusing system and lens focusing method provided by the present invention through the technical solution of "setting the first entity chart and the second entity chart on the chart-free bottom layer, so that there are no charts around the first entity chart, around the second entity chart and between the first entity chart and the second entity chart".

[0010] To further understand the features and technical content of the present invention, please refer to the following detailed description and drawings of the present invention. However, the drawings provided are for reference and illustration only and are not intended to limit the present invention. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of one of the lens focusing systems provided in the first embodiment of the present invention.

[0012] Figure 2 This is another schematic diagram of the lens focusing system provided in the first embodiment of the present invention.

[0013] Figure 3 This is a schematic diagram of a physical distance measurement provided by the chart display structure of the first embodiment of the present invention.

[0014] Figure 4 This is a schematic diagram of a first entity diagram of the first embodiment of the present invention having a plurality of first black areas and a plurality of first white areas.

[0015] Figure 5 The second entity diagram of the first embodiment of the present invention has a plurality of second black areas and a plurality of second white areas.

[0016] Figure 6 This is a schematic diagram of an image measuring distance provided for the chart image information of the first embodiment of the present invention.

[0017] Figure 7 This is a schematic diagram of another image for measuring distance, provided by the chart image information of the first embodiment of the present invention.

[0018] Figure 8 The first embodiment of the present invention shows a lens position adjustment device that rotates the lens structure clockwise to gradually approach the image sensing chip.

[0019] Figure 9 This is a schematic diagram of the lens position adjustment device of the first embodiment of the present invention, which rotates the lens structure counterclockwise to gradually approach the image sensing chip.

[0020] Figure 10 for Figure 8 and Figure 9 A schematic diagram showing that after the lens structure is adjusted by rotation, the optical center point of the lens structure is at a distance from the image sensing chip that is equal to the lens focal length.

[0021] Figure 11 This is a schematic diagram of the lens position adjustment device of the first embodiment of the present invention, which rotates the lens structure counterclockwise to gradually move the lens structure away from the image sensing chip.

[0022] Figure 12 This is a schematic diagram of the lens position adjustment device of the first embodiment of the present invention, which rotates the lens structure clockwise to gradually move the lens structure away from the image sensing chip.

[0023] Figure 13 for Figure 11 and Figure 12 A schematic diagram showing that after the lens structure is adjusted by rotation, the optical center point of the lens structure is at a distance from the image sensing chip that is equal to the lens focal length.

[0024] Figure 14 This is a flowchart of the lens focusing method provided in the second embodiment of the present invention. Detailed Implementation

[0025] The following specific embodiments illustrate the implementation of the "lens focusing system, lens focusing method, and chart display structure" disclosed in this invention. Those skilled in the art can understand the advantages and effects of this invention from the content disclosed in this specification. This invention can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of this invention. Furthermore, it should be stated in advance that the accompanying drawings of this invention are for simple illustrative purposes only and are not depictions based on actual dimensions. The following embodiments will further describe the relevant technical content of this invention in detail, but the disclosed content is not intended to limit the scope of protection of this invention. Additionally, the term "or" used herein may, depending on the actual situation, include any combination of any one or more of the associated listed items.

[0026] [First Embodiment]

[0027] See Figures 1 to 14 As shown, the first embodiment of the present invention provides a lens focusing system S, which includes: a test object carrying device 1, a lens position prediction device 2, and a lens position adjustment device 3.

[0028] First, cooperate Figure 1 and Figure 2As shown, the object-under-test (DUT) carrier 1 can be used to carry an image extraction module M, and the image extraction module M can include at least a lens support M1, a lens structure M2 (or lens assembly) movably disposed on the lens support M1, and an image sensing chip M3 corresponding to the lens structure M2. Additionally, the lens position prediction device 2 includes a chart display structure 20, and the lens position adjustment device 3 can be used to rotatably adjust the distance between the lens structure M2 and the image sensing chip M3. For example, the DUT carrier 1 can be any fixing or clamping device used to position or fix the image extraction module M, the lens structure M2 can include a protective housing movably disposed inside the lens support M1 and at least one lens (or a lens group composed of multiple lenses) disposed within the protective housing, and the image sensing chip M3 can be a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor (CMOS) sensor. Additionally, the lens position prediction device 2 may include a signal control module electrically connected to the image sensing chip M3 and a chart carrying module for carrying the chart display structure 20. Furthermore, the lens position adjustment device 3 may include a clamping mechanism for clamping the lens structure M2 and a drive motor for rotating the clamping mechanism. The lens position adjustment device 3 can clamp the lens structure M2 and rotate it clockwise or counterclockwise relative to the image sensing chip M3 through the cooperation of the clamping mechanism and the drive motor. However, the examples described above are merely one possible embodiment and are not intended to limit the invention.

[0029] Furthermore, in coordination Figure 3 , Figure 4 and Figure 5 As shown, the chart structure 20 includes a first entity chart 201 (or a first entity pattern) and a second entity chart 202 (or a second entity pattern) that are separated from each other, and a first entity reference point 201P of the first entity chart 201 and a second entity reference point 202P of the second entity chart 202 are separated by an entity measurement distance D1. For example, as Figure 3As shown, the chart display structure 20 includes a chartless bottom layer 200 (i.e., a blank area without any patterns), and the first entity chart 201 and the second entity chart 202 are placed on the chartless bottom layer 200, such that there are no charts around the first entity chart 201, around the second entity chart 202, or between the first entity chart 201 and the second entity chart 202 (that is, the charts provided by the chart display structure 20 are only the first entity chart 201 and the second entity chart 201, and the rest of the area is blank without patterns). Furthermore, in conjunction with Figure 4 and Figure 5 As shown, the first entity chart 201 has multiple first black areas 201B and multiple first white areas 201W, and the second entity chart 202 has multiple second black areas 202B and multiple second white areas 202W. Furthermore, the area size (or shape size) of the first black areas 201B of the first entity chart 201 and the second black areas 202B of the second entity chart 202 can be the same or different, and the area size (or shape size) of the first white areas 201W of the first entity chart 201 and the second white areas 202W of the second entity chart 202 can be the same or different. However, the above examples are merely one possible embodiment and are not intended to limit the invention.

[0030] It is worth noting, for example, in conjunction with Figure 3 , Figure 4 and Figure 5 As shown, the first entity reference point 201P of the first entity chart 201 can be a first entity center point 2011, a first entity leftmost point 2012, a first entity rightmost point 2013, or any other arbitrary point, and the second entity reference point 202P of the second entity chart 202 can be a second entity center point 2021, a second entity leftmost point 2022, a second entity rightmost point 2023, or any other arbitrary point. Furthermore, the entity measurement distance D1 between the first entity reference point 201P of the first entity chart 201 and the second entity reference point 202P of the second entity chart 202 can be the distance between "one of the first entity center point 2011, the first entity leftmost point 2012, and the first entity rightmost point 2013 of the first entity chart 201" and "one of the second entity center point 2021, the second entity leftmost point 2022, or the second entity rightmost point 2023 of the second entity chart 202" (for example,...). Figure 3The displayed entity measurement distance D1 is the distance between the first entity center point 2011 of the first entity chart 201 and the second entity center point 2021 of the second entity chart 202. However, the example given above is only one possible embodiment and is not intended to limit the present invention.

[0031] Furthermore, cooperation Figure 1 , Figure 3 , Figure 6 and Figure 7 As shown, when the image sensing chip M3, in conjunction with the lens structure M2, extracts both the first physical chart 201 and the second physical chart 202 of the chart display structure 20 to obtain a chart image information 21, the chart image information 21 can be used to provide a first image chart 211 (or a first virtual chart) corresponding to the first physical chart 201 and a second image chart 212 (or a second virtual chart) corresponding to the second physical chart 202. Furthermore, a first image reference point 211P of the first image chart 211 and a second image reference point 212P of the second image chart 212 are separated by an image measurement distance D2. Additionally, the first image chart 211 and the second image chart 212 are formed on a chart-free bottom layer 210, ensuring that there are no charts around the first image chart 211, around the second image chart 212, or between the first image chart 211 and the second image chart 212. For example, the first image reference point 211P of the first image chart 211 can be a first image center point 2111, a first image leftmost point 2112, a first image rightmost point 2113, or any other arbitrary point, and the second image reference point 212P of the second image chart 212 can be a second image center point 2121, a second image leftmost point 2122, a second image rightmost point 2123, or any other arbitrary point. Furthermore, the image measurement distance D2 between the first image reference point 211P of the first image chart 211 and the second image reference point 212P of the second image chart 212 can be the distance between "one of the first image center point 2111, the first image leftmost point 2112, and the first image rightmost point 2113" and "one of the second image center point 2121, the second image leftmost point 2122, or the second image rightmost point 2123" of the second image chart 212 (e.g., Figure 6 or Figure 7 The displayed image measurement distance D2 is the distance between the first image center point 2111 of the first image chart 211 and the second image center point 2121 of the second image chart 212. However, the example given above is only one possible embodiment and is not intended to limit the present invention.

[0032] Furthermore, in coordination Figure 3 , Figure 6 , Figure 8 , Figure 9 and Figure 10 As shown, when the image sensing chip M3 works in conjunction with the lens structure M2, the image measurement distance D2 (e.g.) is obtained. Figure 6 (As shown) is greater than the entity measurement distance D1 (e.g.) Figure 3 When the optical center point P of lens structure M2 (e.g., the optical center of the lens of lens structure M2) is at a distance L (vertical distance) from the image sensing chip M3 that is greater than the focal length F of lens structure M2 (that is, the distance F between the lens of lens structure M2 and the image sensing chip M3), lens structure M2 can be adjusted by rotating lens position adjustment device 3 so that lens structure M2 gradually moves towards the image sensing chip M3 until the actual distance P of optical center point P of lens structure M2 from the image sensing chip M3 is equal to the focal length F of lens structure M2 (that is, the focal point of lens structure M2 will fall completely on image sensing chip M3). Figure 10 (As shown).

[0033] For example, coordination Figure 3 , Figure 6 , Figure 8 and Figure 10 As shown, the lens holder M1 has a right-hand internal thread M11, and the lens structure M2 has a right-hand external thread M21 that mates with the right-hand internal thread M11. Therefore, when the image sensing chip M3 engages with the lens structure M2, the image measurement distance D2 (e.g., ...) is obtained. Figure 6 (As shown) is greater than the entity measurement distance D1 (e.g.) Figure 3 When (as shown), the lens position adjustment device 3 can rotate clockwise to adjust the lens structure M2 (as shown). Figure 8 (As shown by the clockwise arrow), so that the lens structure M2 gradually approaches the image sensor chip M3 in a clockwise rotation, until the optical center point P of the lens structure M2 is at a distance L from the image sensor chip M3 equal to the focal length F of the lens structure M2, so that the focal point of the lens structure M2 falls completely on the image sensor chip M3 (as shown by the clockwise arrow). Figure 10 (As shown), the lens structure M2 can then be fixed inside the lens bracket M1 by applying adhesive. However, the example given above is only one possible embodiment and is not intended to limit the invention.

[0034] For example, coordination Figure 3 , Figure 6 , Figure 9 and Figure 10As shown, the lens holder M1 has a left-hand internal thread M12, and the lens structure M2 has a left-hand external thread M22 that mates with the left-hand internal thread M12. Therefore, when the image sensing chip M3 engages with the lens structure M2, the image measurement distance D2 (e.g., ...) is obtained. Figure 6 (As shown) is greater than the entity measurement distance D1 (e.g.) Figure 3 When (as shown), the lens position adjustment device 3 can rotate counterclockwise to adjust the lens structure M2 (as shown). Figure 9 (As shown by the counter-clockwise arrow), so that the lens structure M2 gradually approaches the image sensor chip M3 in a counter-clockwise rotation, until the optical center point P of the lens structure M2 is at a distance L from the image sensor chip M3 equal to the focal length F of the lens structure M2, so that the focal point of the lens structure M2 will fall completely on the image sensor chip M3 (as shown by the counter-clockwise arrow). Figure 10 (As shown), the lens structure M2 can then be fixed inside the lens bracket M1 by applying adhesive. However, the example given above is only one possible embodiment and is not intended to limit the invention.

[0035] Furthermore, in coordination Figure 3 , Figure 7 , Figure 11 , Figure 12 and Figure 13 As shown, when the image sensing chip M3 works in conjunction with the lens structure M2, the image measurement distance D2 (e.g.) is obtained. Figure 7 (As shown) is less than the physical measurement distance D1 (e.g.) Figure 3 When the optical center point P of lens structure M2 (e.g., the optical center of the lens of lens structure M2) is less than the actual distance L (vertical distance) from the image sensing chip M3 (i.e., the focal length F of the lens of lens structure M2) compared to the image sensing chip M3, lens structure M2 can be adjusted by rotating the lens position adjustment device 3 to gradually move away from the image sensing chip M3 until the actual distance L from the optical center point P of lens structure M2 to the image sensing chip M3 is equal to the focal length F of the lens of lens structure M2 (i.e., the focal point of lens structure M2 will fall completely on the image sensing chip M3). Figure 13 (As shown).

[0036] For example, coordination Figure 3 , Figure 7 , Figure 11 and Figure 13 As shown, the lens holder M1 has a right-hand internal thread M11, and the lens structure M2 has a right-hand external thread M21 that mates with the right-hand internal thread M11. Therefore, when the image sensing chip M3 engages with the lens structure M2, the image measurement distance D2 (e.g., ...) is obtained. Figure 7(As shown) is less than the physical measurement distance D1 (e.g.) Figure 3 When (as shown), the lens position adjustment device 3 can rotate counterclockwise to adjust the lens structure M2 (as shown). Figure 11 (As shown by the counter-clockwise arrow), so that the lens structure M2 gradually moves away from the image sensor chip M3 in a counter-clockwise rotation, until the optical center point P of the lens structure M2 is at a distance L from the image sensor chip M3 equal to the focal length F of the lens structure M2, so that the focal point of the lens structure M2 falls completely on the image sensor chip M3 (as shown by the counter-clockwise arrow). Figure 13 (As shown), the lens structure M2 can then be fixed inside the lens bracket M1 by applying adhesive. However, the example given above is only one possible embodiment and is not intended to limit the invention.

[0037] For example, coordination Figure 3 , Figure 7 , Figure 12 and Figure 13 As shown, the lens holder M1 has a left-hand internal thread M12, and the lens structure M2 has a left-hand external thread M22 that mates with the left-hand internal thread M12. Therefore, when the image sensing chip M3 engages with the lens structure M2, the image measurement distance D2 (e.g., ...) is obtained. Figure 7 (As shown) is less than the physical measurement distance D1 (e.g.) Figure 3 When (as shown), the lens position adjustment device 3 can rotate clockwise to adjust the lens structure M2 (as shown). Figure 12 (As shown by the clockwise arrow), so that the lens structure M2 gradually moves away from the image sensor chip M3 in a clockwise rotation, until the optical center point P of the lens structure M2 is at a distance L from the image sensor chip M3 equal to the focal length F of the lens structure M2, so that the focal point of the lens structure M2 falls completely on the image sensor chip M3 (as shown by the clockwise arrow). Figure 13 (As shown), the lens structure M2 can then be fixed inside the lens bracket M1 by applying adhesive. However, the example given above is only one possible embodiment and is not intended to limit the invention.

[0038] [Second Embodiment]

[0039] See Figures 1 to 14 As shown, the second embodiment of the present invention provides a lens focusing method, which includes at least the following steps: First, as Figure 3 As shown, a chart display structure 20 is provided, which includes a first entity chart 201 and a second entity chart 202 that are separated from each other. A first entity reference point 201P of the first entity chart 201 and a second entity reference point 202P of the second entity chart 202 are separated by an entity measurement distance D1 (step S100); then, in conjunction with Figure 1 , Figure 3 , Figure 6 and Figure 7 As shown, an image sensing chip M3, in conjunction with a lens structure M2, extracts both the first entity chart 201 and the second entity chart 202 from the chart display structure 20 to obtain chart image information 21. Chart image information 21 provides a first image chart 211 corresponding to the first entity chart 201 and a second image chart 212 corresponding to the second entity chart 202. A first image reference point 211P of the first image chart 211 and a second image reference point 212P of the second image chart 212 are separated by an image measurement distance D2 (step S102). Then, in conjunction with… Figures 6 to 13 As shown, based on the comparison between the physical measurement distance D1 and the image measurement distance D2, the lens structure M2 is gradually moved toward or away from the image sensing chip M3 until an optical center point P of the lens structure M2 is at an actual distance L from the image sensing chip M3 equal to the lens focal length F of the lens structure M2 (step S104).

[0040] Furthermore, in coordination Figure 3 , Figure 6 , Figure 8 , Figure 9 and Figure 10 As shown, when the image measurement distance D2 obtained by the image sensing chip M3 in conjunction with the lens structure M2 is greater than the physical measurement distance D1, since the actual distance L between the optical center point P of the lens structure M2 and the image sensing chip M3 is greater than the lens focal length F of the lens structure M2, the lens structure M2 can be rotated and adjusted so that the lens structure M2 gradually moves towards the direction closer to the image sensing chip M3 until the actual distance L between the optical center point P of the lens structure M2 and the image sensing chip M3 is equal to the lens focal length F of the lens structure M2.

[0041] Furthermore, in coordination Figure 3 , Figure 7 , Figure 11 , Figure 12 and Figure 13 As shown, when the image measurement distance D2 obtained by the image sensing chip M3 in conjunction with the lens structure M2 is less than the physical measurement distance D1, since the actual distance L between the optical center point P of the lens structure M2 and the image sensing chip M3 is less than the focal length of the lens structure M2, the lens structure M2 can be rotated and adjusted so that the lens structure M2 gradually moves away from the image sensing chip M3 until the actual distance L between the optical center point P of the lens structure M2 and the image sensing chip M3 is equal to the focal length F of the lens structure M2.

[0042] [Beneficial Effects of the Examples]

[0043] One of the beneficial effects of the present invention is that the lens focusing system S provided by the present invention can be configured to: "a test object carrying device 1 is used to carry an image extraction module M, and the image extraction module M includes a lens support M1, a lens structure M2 movably disposed on the lens support M1, and an image sensing chip M3 corresponding to the lens structure M2"; "a lens position prediction device 2 includes a chart display structure 20, and the chart display structure 20 includes a first entity chart 201 and a second entity chart 202 separated from each other, and a first entity reference point 201P of the first entity chart 201 and a second entity reference point 202P of the second entity chart 202 are separated by an entity measurement distance D1". The technical solution of "the lens position adjustment device 3 is used to rotatably adjust the distance between the lens structure M2 and the image sensing chip M3" is such that when the image measurement distance D2 obtained by the image sensing chip M3 in conjunction with the lens structure M2 is greater than the physical measurement distance D1, the lens structure M2 can be gradually moved towards the image sensing chip M3 by rotating the lens position adjustment device 3. And when the image measurement distance D2 obtained by the image sensing chip M3 in conjunction with the lens structure M2 is less than the physical measurement distance D1, the lens structure M2 can be gradually moved away from the image sensing chip M3 by rotating the lens position adjustment device 3.

[0044] Another beneficial effect of the present invention is that the lens focusing method provided by the present invention can achieve the following: "Providing a chart display structure 20, the chart display structure 20 includes a first entity chart 201 and a second entity chart 202 separated from each other, wherein a first entity reference point 201P of the first entity chart 201 and a second entity reference point 202P of the second entity chart 202 are separated by an entity measurement distance D1"; "Using an image sensing chip M3 in conjunction with a lens structure M2 to extract both the first entity chart 201 and the second entity chart 202 of the chart display structure 20 to obtain chart image information 21, the chart image information 21 is used to provide a first image chart 211 corresponding to the first entity chart 201 and a second image chart 212 corresponding to the second entity chart 202, wherein a first image reference point 211P of the first image chart 211 and a second image reference point 212P of the second image chart 212 are..." The technical solution of "the two are separated by an image measurement distance D2" and "based on the comparison between the physical measurement distance D1 and the image measurement distance D2, the lens structure M2 is gradually moved towards or away from the image sensing chip M3 until the optical center point of the lens structure M2 is equal to the actual distance L between the lens structure M2 and the image sensing chip M3, which is equal to the lens focal length F of the lens structure M2" is such that when the image measurement distance D2 obtained by the image sensing chip M3 in conjunction with the lens structure M2 is greater than the physical measurement distance D1, the lens structure M2 can be adjusted by rotating the lens position adjustment device 3 to gradually move towards the image sensing chip M3, and when the image measurement distance D2 obtained by the image sensing chip M3 in conjunction with the lens structure M2 is less than the physical measurement distance D1, the lens structure M2 can be adjusted by rotating the lens position adjustment device 3 to gradually move away from the image sensing chip M3.

[0045] Another beneficial effect of the present invention is that the chart display structure 20 provided by the present invention can be applied to the lens focusing system S and lens focusing method provided by the present invention through the technical solution of "the first entity chart 201 and the second entity chart 202 are set on the chartless bottom layer 200 so that there are no charts around the first entity chart 201, around the second entity chart 202 and between the first entity chart 201 and the second entity chart 202".

[0046] The content disclosed above is only a preferred and feasible embodiment of the present invention, and is not intended to limit the scope of protection of the claims of the present invention. Therefore, all equivalent technical changes made based on the content of the present invention specification and drawings are included within the scope of protection of the claims of the present invention.

Claims

1. A lens focusing system, characterized in that, The lens focusing system includes: A test object carrying device is used to carry an image extraction module. The image extraction module includes a lens bracket, a lens structure movably disposed on the lens bracket, and an image sensing chip corresponding to the lens structure. A lens position prediction device, the lens position prediction device including a chart display structure; and A lens position adjustment device is provided, wherein the lens position adjustment device is used to rotatably adjust the distance between the lens structure and the image sensing chip; The chart display structure includes a first entity chart and a second entity chart that are separated from each other, and a first entity reference point of the first entity chart and a second entity reference point of the second entity chart are separated by an entity measurement distance. Wherein, when the image sensing chip cooperates with the lens structure to extract both the first entity chart and the second entity chart of the chart display structure to obtain a chart image information, the chart image information is used to provide a first image chart corresponding to the first entity chart and a second image chart corresponding to the second entity chart, and a first image reference point of the first image chart and a second image reference point of the second image chart are separated by an image measurement distance. Wherein, when the image measurement distance obtained by the image sensing chip in conjunction with the lens structure is greater than the physical measurement distance, since the actual distance between the optical center point of the lens structure and the image sensing chip is greater than the focal length of the lens structure, the lens structure is rotated and adjusted by the lens position adjustment device so that the lens structure gradually moves toward the direction closer to the image sensing chip until the actual distance between the optical center point of the lens structure and the image sensing chip is equal to the focal length of the lens structure; When the image measurement distance obtained by the image sensing chip in conjunction with the lens structure is less than the physical measurement distance, since the actual distance between the optical center point of the lens structure and the image sensing chip is less than the focal length of the lens structure, the lens structure is rotated and adjusted by the lens position adjustment device so that the lens structure gradually moves away from the image sensing chip until the actual distance between the optical center point of the lens structure and the image sensing chip is equal to the focal length of the lens structure.

2. The lens focusing system according to claim 1, characterized in that, in, The lens bracket has a right-hand internal thread, and the lens structure has a right-hand external thread that mates with the right-hand internal thread. When the image measurement distance obtained by the image sensing chip in conjunction with the lens structure is greater than the physical measurement distance, the lens position adjustment device rotates clockwise to adjust the lens structure so that the lens structure gradually approaches the image sensing chip in a clockwise rotation manner until the actual distance between the optical center point of the lens structure and the image sensing chip is equal to the focal length of the lens structure. When the image measurement distance obtained by the image sensing chip in conjunction with the lens structure is less than the physical measurement distance, the lens position adjustment device rotates counterclockwise to adjust the lens structure so that the lens structure gradually moves away from the image sensing chip in a counterclockwise rotation manner, until the actual distance between the optical center point of the lens structure and the image sensing chip is equal to the focal length of the lens structure.

3. The lens focusing system according to claim 1, characterized in that, in, The lens bracket has a left-hand internal thread, and the lens structure has a left-hand external thread that mates with the left-hand internal thread. Wherein, when the image measurement distance obtained by the image sensing chip in conjunction with the lens structure is greater than the physical measurement distance, the lens position adjustment device rotates counterclockwise to adjust the lens structure so that the lens structure gradually approaches the image sensing chip in a counterclockwise rotation manner, until the optical center point of the lens structure is at a distance from the actual distance of the image sensing chip to the lens structure equal to the focal length of the lens structure. When the image measurement distance obtained by the image sensing chip in conjunction with the lens structure is less than the physical measurement distance, the lens position adjustment device rotates clockwise to adjust the lens structure so that the lens structure gradually moves away from the image sensing chip in a clockwise rotation manner, until the actual distance between the optical center point of the lens structure and the image sensing chip is equal to the focal length of the lens structure.

4. The lens focusing system according to claim 1, characterized in that, in, The chart display structure includes a chartless bottom layer, and the first entity chart and the second entity chart are placed on the chartless bottom layer, so that there are no charts around the first entity chart, around the second entity chart, and between the first entity chart and the second entity chart. The first entity chart has multiple first black areas and multiple first white areas, and the second entity chart has multiple second black areas and multiple second white areas. Wherein, the first black area of ​​the first entity chart and the second black area of ​​the second entity chart are the same or different in size, and the first white area of ​​the first entity chart and the second white area of ​​the second entity chart are the same or different in size. Wherein, the first entity reference point of the first entity chart is a first entity center point, a first entity leftmost point, or a first entity rightmost point, and the second entity reference point of the second entity chart is a second entity center point, a second entity leftmost point, or a second entity rightmost point; Wherein, the entity measurement distance between the first entity reference point of the first entity chart and the second entity reference point of the second entity chart is the distance between one of the first entity center point, the first entity leftmost point and the first entity rightmost point of the first entity chart and one of the second entity center point, the second entity leftmost point or the second entity rightmost point of the second entity chart. Wherein, the first image reference point of the first image chart is a first image center point, a first image leftmost point, or a first image rightmost point, and the second image reference point of the second image chart is a second image center point, a second image leftmost point, or a second image rightmost point; Wherein, the image measurement distance between the first image reference point of the first image chart and the second image reference point of the second image chart is the distance between one of the first image center point, the first image leftmost point, and the first image rightmost point of the first image chart and one of the second image center point, the second image leftmost point, or the second image rightmost point of the second image chart.

5. A lens focusing method, characterized in that, The lens focusing method includes: A chart display structure is provided, the chart display structure including a first entity chart and a second entity chart that are separated from each other, wherein a first entity reference point of the first entity chart and a second entity reference point of the second entity chart are separated by an entity measurement distance. A chart image information is obtained by using an image sensing chip and a lens structure to extract both the first entity chart and the second entity chart of the chart display structure. This chart image information provides a first image chart corresponding to the first entity chart and a second image chart corresponding to the second entity chart. A first image reference point of the first image chart and a second image reference point of the second image chart are separated by an image measurement distance. Based on the comparison between the physical measurement distance and the image measurement distance, the lens structure is gradually moved toward or away from the image sensing chip until an optical center point of the lens structure is at an actual distance from the image sensing chip equal to a lens focal length of the lens structure. Wherein, when the image measurement distance obtained by the image sensing chip in conjunction with the lens structure is greater than the physical measurement distance, since the actual distance between the optical center point of the lens structure and the image sensing chip is greater than the focal length of the lens structure, the lens structure is rotated and adjusted so that the lens structure gradually moves toward the image sensing chip until the actual distance between the optical center point of the lens structure and the image sensing chip is equal to the focal length of the lens structure; When the image measurement distance obtained by the image sensing chip in conjunction with the lens structure is less than the physical measurement distance, since the actual distance between the optical center point of the lens structure and the image sensing chip is less than the focal length of the lens structure, the lens structure is rotated and adjusted so that the lens structure gradually moves away from the image sensing chip until the actual distance between the optical center point of the lens structure and the image sensing chip is equal to the focal length of the lens structure.

6. The lens focusing method according to claim 5, characterized in that, in, A lens holder has a right-hand internal thread, and the lens structure has a right-hand external thread that engages with the right-hand internal thread; When the image measurement distance obtained by the image sensing chip in conjunction with the lens structure is greater than the physical measurement distance, the lens structure is rotated clockwise to gradually approach the image sensing chip in a clockwise rotation manner, until the actual distance between the optical center point of the lens structure and the image sensing chip is equal to the focal length of the lens structure. When the image measurement distance obtained by the image sensing chip in conjunction with the lens structure is less than the physical measurement distance, the lens structure is rotated counterclockwise to gradually move away from the image sensing chip, until the actual distance between the optical center point of the lens structure and the image sensing chip is equal to the focal length of the lens structure.

7. The lens focusing method according to claim 5, characterized in that, in, A lens holder has a left-hand internal thread, and the lens structure has a left-hand external thread that engages with the left-hand internal thread; When the image measurement distance obtained by the image sensing chip in conjunction with the lens structure is greater than the physical measurement distance, the lens structure is rotated counterclockwise to gradually approach the image sensing chip in a counterclockwise rotation manner until the actual distance between the optical center point of the lens structure and the image sensing chip is equal to the focal length of the lens structure. Specifically, when the image measurement distance obtained by the image sensing chip in conjunction with the lens structure is less than the physical measurement distance, the lens structure is rotated clockwise to gradually move away from the image sensing chip, until the actual distance between the optical center point of the lens structure and the image sensing chip is equal to the focal length of the lens structure.

8. The lens focusing method according to claim 5, characterized in that, in, The chart display structure includes a chartless bottom layer, and the first entity chart and the second entity chart are placed on the chartless bottom layer, so that there are no charts around the first entity chart, around the second entity chart, and between the first entity chart and the second entity chart. The first entity chart has multiple first black areas and multiple first white areas, and the second entity chart has multiple second black areas and multiple second white areas. Wherein, the first black area of ​​the first entity chart and the second black area of ​​the second entity chart are the same or different in size, and the first white area of ​​the first entity chart and the second white area of ​​the second entity chart are the same or different in size. Wherein, the first entity reference point of the first entity chart is a first entity center point, a first entity leftmost point, or a first entity rightmost point, and the second entity reference point of the second entity chart is a second entity center point, a second entity leftmost point, or a second entity rightmost point; Wherein, the entity measurement distance between the first entity reference point of the first entity chart and the second entity reference point of the second entity chart is the distance between one of the first entity center point, the first entity leftmost point and the first entity rightmost point of the first entity chart and one of the second entity center point, the second entity leftmost point or the second entity rightmost point of the second entity chart. Wherein, the first image reference point of the first image chart is a first image center point, a first image leftmost point, or a first image rightmost point, and the second image reference point of the second image chart is a second image center point, a second image leftmost point, or a second image rightmost point; Wherein, the image measurement distance between the first image reference point of the first image chart and the second image reference point of the second image chart is the distance between one of the first image center point, the first image leftmost point, and the first image rightmost point of the first image chart and one of the second image center point, the second image leftmost point, or the second image rightmost point of the second image chart.

9. A chart display structure, characterized in that, The chart display structure includes a chartless bottom layer, a first entity chart, and a second entity chart, wherein the first entity chart and the second entity chart are placed on the chartless bottom layer, so that there are no charts around the first entity chart, around the second entity chart, and between the first entity chart and the second entity chart. The chart display structure provides only the first entity chart and the second entity chart. The first entity chart has multiple first black areas and multiple first white areas, and the second entity chart has multiple second black areas and multiple second white areas. Wherein, the first black area of ​​the first entity chart and the second black area of ​​the second entity chart are the same or different in size, and the first white area of ​​the first entity chart and the second white area of ​​the second entity chart are the same or different in size. Wherein, a first entity reference point of the first entity chart and a second entity reference point of the second entity chart are separated by an entity measurement distance; Wherein, when an image sensing chip is used in conjunction with a lens structure to extract both the first entity chart and the second entity chart of the chart display structure to obtain a chart image information, the chart image information is used to provide a first image chart corresponding to the first entity chart and a second image chart corresponding to the second entity chart, and a first image reference point of the first image chart and a second image reference point of the second image chart are separated by an image measurement distance. Wherein, when the image measurement distance obtained by the image sensing chip in conjunction with the lens structure is greater than the physical measurement distance, since the actual distance between an optical center point of the lens structure and the image sensing chip is greater than the focal length of the lens structure, the lens structure is rotated and adjusted so that the lens structure gradually moves toward the direction closer to the image sensing chip until the actual distance between the optical center point of the lens structure and the image sensing chip is equal to the focal length of the lens structure; When the image measurement distance obtained by the image sensing chip in conjunction with the lens structure is less than the physical measurement distance, since the actual distance between the optical center point of the lens structure and the image sensing chip is less than the focal length of the lens structure, the lens structure is rotated and adjusted so that the lens structure gradually moves away from the image sensing chip until the actual distance between the optical center point of the lens structure and the image sensing chip is equal to the focal length of the lens structure.

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