TWI792582B - Lens focusing system, lens focusing method and chart display structure - Google Patents

Abstract

The present invention provides a lens focusing system, a lens focusing method and a chart display structure. The lens focusing system includes a measured object carrying device, a lens position prejudging device, and a lens position adjusting device. The measured object carrying device is configured for carrying an image capturing module. The image capturing module includes a lens structure and an image sensing chip. The lens position prejudging device includes a chart display structure. The chart display structure is configured for providing a physical measurement distance and an image measurement distance. Therefore, the lens structure can be gradually moved along a direction toward or away from the image sensing chip according to the comparison between the physical measurement distance and the image measurement distance until an actual distance from an optical central point of the lens structure to the image sensing chip is equal to a lens focal distance of the lens structure.

Description

Lens focusing system, lens focusing method and diagram display structure

The invention relates to a focusing system, a focusing method and a display structure, in particular to a lens focusing system, a lens focusing method and a chart display structure.

In the prior art, the image capture module includes a lens bracket and a lens assembly, and the lens assembly needs to be focused before being fixed on the lens bracket. However, the focusing system and focusing method of the lens assembly in the prior art still have room for improvement.

The technical problem to be solved by the present invention is to provide a lens focusing system, a lens focusing method, and a graph display structure in view of the deficiencies in the prior art.

In order to solve the above-mentioned technical problems, one of the technical solutions adopted by the present invention is to provide a lens focusing system, which includes: an object-under-test carrying device, a lens position predicting device, and a lens position adjusting device. The object carrying device to be tested is used to carry an image capture module, and the image capture module includes a lens bracket, a lens structure movably arranged on the lens bracket, and an image sensing chip corresponding to the lens structure. The lens position prediction device includes a graph display structure. The lens position adjusting device is used for rotatably adjusting the distance between the lens structure and the image sensing chip. Wherein, the diagram display structure includes a first entity diagram and a second entity diagram separated from each other, and a first entity reference point of the first entity diagram and a second entity reference point of the second entity diagram are separated by an entity Measure distance. Wherein, when the image sensing chip cooperates with the lens structure to capture both the first entity graph and the second entity graph of the graph display structure to obtain a graph image information, the graph image information is used to provide information corresponding to the first entity graph A first image graph and a second image graph corresponding to the second entity graph, and a first image reference point of the first image graph and a second image reference point of the second image graph are separated by an image measure distance. Wherein, when the image measurement distance obtained by the image sensor chip with the lens structure is greater than the physical measurement distance, since an actual distance between an optical center point of the lens structure and the image sensor chip is greater than a lens focal length of the lens structure, Therefore, the lens structure is adjusted through the rotation of the lens position adjustment device, so that the lens structure gradually moves towards the direction of the image sensor chip until the actual distance between the optical center point of the lens structure and the image sensor chip is equal to the lens focal length of the lens structure. Wherein, when the image measurement distance obtained by the image sensing chip with the lens structure is smaller than the physical measurement distance, since the actual distance between the optical center point of the lens structure and the image sensing chip is smaller than the lens focal length of the lens structure, the lens structure Through the rotation adjustment of the lens position adjustment device, the lens structure gradually moves away from the image sensor chip until the actual distance between the optical center of the lens structure and the image sensor chip is equal to the lens focal length of the lens structure.

In order to solve the above technical problems, another technical solution adopted by the present invention is to provide a lens focusing method, which includes: providing a graph display structure, the graph display structure includes a first entity graph and a second entity graph that are separated from each other , a physical measurement distance between a first physical reference point of the first physical graph and a second physical reference point of the second physical graph; through an image sensing chip and a lens structure to capture the graph display structure A chart image information is obtained after both the first entity chart and the second entity chart, and 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 graph and a second image reference point of the second image graph are separated by an image measurement distance; and, according to the comparison of the physical measurement distance and the image measurement distance, the The lens structure gradually moves toward or away from the image sensing chip until an actual distance between an optical center of the lens structure and the image sensing chip is equal to a lens focal length of the lens structure. Wherein, when the image measurement distance obtained by the image sensor chip 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 sensor chip is greater than the lens focal length of the lens structure, the lens structure Through the rotation adjustment, the lens structure gradually moves toward the image sensing chip until the actual distance between the optical center of the lens structure and the image sensing chip is equal to the lens focal length of the lens structure. Wherein, when the image measurement distance obtained by the image sensing chip with the lens structure is smaller than the physical measurement distance, since the actual distance between the optical center point of the lens structure and the image sensing chip is smaller than the lens focal length of the lens structure, the lens structure Through rotation adjustment, the lens structure gradually moves away from the image sensor chip until the actual distance between the optical center of the lens structure and the image sensor chip is equal to the lens focal length of the lens structure.

In order to solve the above-mentioned technical problems, another technical solution adopted by the present invention is to provide a graph display structure, which includes a bottom layer without graph, a first entity graph and a second entity graph, and the first entity graph and the second entity graph The second entity graph is disposed on the graph-free bottom layer such that there are no graphs around the first entity graph, around the second entity graph, and between the first entity graph and the second entity graph.

One of the beneficial effects of the present invention is that a lens focusing system provided by the present invention can be used to carry an image capture module through the "object-under-test carrying device, and the image capture module includes a lens bracket, which can A lens structure that is movably arranged on the lens holder and an image sensing chip corresponding to the lens structure", "the lens position prediction device includes a graph display structure, and the graph display structure includes a first entity graph separated from each other and a second physical graph, and a first physical reference point of the first physical graph and a second physical reference point of the second physical graph are separated by a physical measurement distance" and "the lens position adjustment device is used to rotatably Adjusting the distance between the lens structure and the image sensor chip” so that when the image measurement distance obtained by the image sensor chip with the lens structure is greater than the physical measurement distance, the lens structure can be adjusted through the rotation of the lens position adjustment device Adjust so that the lens structure gradually moves towards the direction of the image sensor chip, and when the image measurement distance obtained by the image sensor chip with the lens structure is smaller than the physical measurement distance, the lens structure can be adjusted through the rotation of the lens position adjustment device Adjust, so that the lens structure gradually moves away from the image sensing chip.

Another beneficial effect of the present invention is that a lens focusing method provided by the present invention can pass through "providing a graph display structure, the graph display structure includes a first entity graph and a second entity graph separated from each other, the first A physical measurement distance between a first physical reference point of the physical chart and a second physical reference point of the second physical chart”, “capturing the second physical chart display structure through an image sensing chip and a lens structure After a physical graph and a second physical graph, a graph image information is obtained, and the graph image information is used to provide a first image graph corresponding to the first entity graph and a second image graph corresponding to the second entity graph, 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" and "according to the comparison between the physical measurement distance and the image measurement distance, the lens The structure gradually moves toward or away from the image sensor chip until the actual distance between an optical center point of the lens structure and the image sensor chip is equal to a lens focal length of the lens structure", so that when the image sensor When the image measurement distance obtained by the chip with the lens structure is greater than the physical measurement distance, the lens structure can be adjusted through the rotation of the lens position adjustment device, so that the lens structure gradually moves towards the direction close to the image sensing chip, and when the image sensing When the image measurement distance acquired by the chip with the lens structure is smaller than the physical measurement distance, the lens structure can be adjusted through the rotation of the lens position adjustment device, so that the lens structure gradually moves away from the image sensing chip.

Another beneficial effect of the present invention is that a graph display structure provided by the present invention can be set on the bottom layer without graphs by "the first entity graph and the second entity graph, so that the surroundings of the first entity graph, the second entity graph There is no chart around the second entity chart and between the first entity chart and the second entity chart, so that the chart display structure can be applied to the lens focusing system and lens focusing method provided by the present invention.

In order to further understand the features and technical content of the present invention, please refer to the following detailed description and drawings related to the present invention. However, the provided drawings are only for reference and description, and are not intended to limit the present invention.

The following is a description of the implementation of the "lens focusing system, lens focusing method, and chart display structure" disclosed by the present invention through specific specific examples. Those skilled in the art can understand the advantages and effects of the present invention from the content disclosed in this specification . The present invention can be implemented or applied through other different specific embodiments, and various modifications and changes can be made to the details in this specification based on different viewpoints and applications without departing from the concept of the present invention. In addition, it should be stated in advance that the drawings of the present invention are only schematic illustrations, and are not drawn according to actual dimensions. The following embodiments will further describe the relevant technical content of the present invention in detail, but the disclosed content is not intended to limit the protection scope of the present invention. In addition, the term "or" used herein may include any one or a combination of more of the associated listed items depending on the actual situation.

[first embodiment]

Referring to FIGS. 1 to 14 , the first embodiment of the present invention provides a lens focusing system S, which includes: an object-under-test carrying device 1 , a lens position predicting device 2 and a lens position adjusting device 3 .

First, as shown in FIG. 1 and FIG. 2 , the object-under-test carrying device 1 can be used to carry an image capture module M, and the image capture module M can at least include a lens bracket M1, which can be movably arranged on the lens A lens structure M2 (or lens assembly) on the bracket M1 and an image sensor chip M3 corresponding to the lens structure M2. In addition, the lens position predicting device 2 includes a graph display structure 20, and the lens position adjusting device 3 can be used to rotatably adjust the distance between the lens structure M2 and the image sensing chip M3. For example, the object-under-test carrying device 1 can be any fixing device or clamping device that can be used to position or fix the image capture module M, and the lens structure M2 can include a protective shell movably arranged inside the lens bracket M1 Body and at least one lens (or a lens group composed of multiple lenses) arranged in the protective shell, and the image sensing chip M3 can be a charge-coupled device (Charge-coupled Device, CCD) or a complementary metal oxide Semiconductor (Complementary Metal-Oxide-Semiconductor, CMOS) sensor. In addition, the lens position predicting device 2 may include a signal control module electrically connected to the image sensing chip M3 and a graph carrying module for carrying the graph display structure 20 . In addition, the lens position adjustment device 3 may include a clamping mechanism for clamping the lens structure M2 and a driving motor for driving the clamping mechanism to rotate, and the lens position adjustment device 3 may pass through the interaction between the clamping mechanism and the driving motor cooperate to clamp the lens structure M2 and drive the lens structure M2 to rotate clockwise or counterclockwise relative to the image sensing chip M3. However, the above-mentioned example is only one possible embodiment and is not intended to limit the present invention.

Furthermore, as shown in FIG. 3 , FIG. 4 and FIG. 5 , the graph display structure 20 includes a first entity graph 201 (or a first entity pattern) and a second entity graph 202 (or a second entity pattern) separated from each other. two physical patterns), and a physical measurement distance D1 between a first physical reference point 201P of the first physical graph 201 and a second physical reference point 202P of the second physical graph 202 . For example, as shown in FIG. 3 , the chart display structure 20 includes a chart-less bottom layer 200 (that is, a blank area without any pattern), and the first entity chart 201 and the second entity chart 202 are arranged on the chart-free bottom layer 200 , so that there is no chart 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 (that is, the chart display structure 20 provided There are only the first entity chart 201 and the second entity chart 201 in the chart, and the rest of the area except the first entity chart 201 and the second entity chart 201 are blank without patterns). Furthermore, as shown in FIG. 4 and FIG. 5 , 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 a second white area 202W. In addition, the area size (or shape size) of the first black area 201B of the first entity chart 201 and the second black area 202B of the second entity chart 202 may be the same or different, and the first white area of the first entity chart 201 The area size (or shape size) of the area 201W and the second white area 202W of the second entity graph 202 may be the same or different. However, the above-mentioned example is only one possible embodiment and is not intended to limit the present invention.

It should be noted that, for example, as shown in FIG. 3 , FIG. 4 and FIG. 5 , the first entity reference point 201P of the first entity graph 201 may be a first entity center point 2011, a first entity leftmost point 2012, a first entity rightmost point 2013 or any other point, and the second entity reference point 202P of the second entity chart 202 may be a second entity center point 2021, a second entity leftmost point 2022, a first entity Two entity rightmost point 2023 or other arbitrary points. Furthermore, the entity measurement distance D1 between the first entity reference point 201P of the first entity graph 201 and the second entity reference point 202P of the second entity graph 202 may be "the first entity of the first entity graph 201 One of the center point 2011, the first entity leftmost point 2012 and the first entity rightmost point 2013 is "distance" from the second entity center point 2021, the second entity leftmost point 2022 or the second entity graph 202. The distance between one of the rightmost point 2023 of the entity” (for example, the entity measurement distance D1 shown in FIG. Center point 2021 distance between the two). However, the above-mentioned example is only one possible embodiment and is not intended to limit the present invention.

Furthermore, as shown in FIG. 1 , FIG. 3 , FIG. 6 and FIG. 7 , when the image sensing chip M3 cooperates with the lens structure M2 to capture both the first entity graph 201 and the second entity graph 202 of the graph display structure 20 When obtaining 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 first image chart 211 corresponding to the second physical chart 202. Two image charts 212 (or second virtual charts), and 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 . In addition, the first image table 211 and the second image table 212 will be formed on the non-graph bottom layer 210, so that the surroundings of the first image table 211, the surroundings of the second image table 212 and the first image table 211 and the second image table 212 There are no diagrams in between. For example, the first image reference point 211P of the first image chart 211 may be a first image center point 2111, a first image leftmost point 2112, a first image rightmost point 2113 or other arbitrary points, and The second image reference point 212P of the second image chart 212 may be a second image center point 2121 , a second image leftmost point 2122 , a second image rightmost point 2123 or any other point. Moreover, 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 may be "the first image of the first image chart 211 One of the center point 2111, the leftmost point 2112 of the first image and the rightmost point 2113 of the first image is "distance" from the second image center point 2121, the second leftmost point 2122 or the second image chart 212 of the second image chart 212. The distance between one of the rightmost point 2123 of the image (for example, the image measurement distance D2 shown in Figure 6 or Figure 7 is: the first image center point 2111 of the first image chart 211 and the second image chart 212 distance between the second image center point 2121). However, the above-mentioned example is only one possible embodiment and is not intended to limit the present invention.

Furthermore, as shown in FIG. 3, FIG. 6, FIG. 8, FIG. 9 and FIG. When measuring the distance D1 (as shown in FIG. 3 ), since an optical center point P of the lens structure M2 (such as the optical center of the lens of the lens structure M2) is separated from an actual distance L (vertical distance) of the image sensor chip M3 greater than a lens focal length F of the lens structure M2 (that is, the lens of the lens structure M2 is separated from the lens focal length F of the image sensing chip M3), so the lens structure M2 can be adjusted through the rotation of the lens position adjustment device 3, so that the lens structure M2 Gradually move toward the direction approaching the image sensing chip M3 until the actual distance 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 (that is, the focal point of the lens structure M2 will be falls completely on the image sensing chip M3) (as shown in FIG. 10 ).

For example, as shown in FIG. 3, FIG. 6, FIG. 8 and FIG. 10, the lens holder M1 has a right-handed internal thread M11, and the lens structure M2 has a right-handed external thread M21 that cooperates with the right-handed internal thread M11 . In this way, when the image measurement distance D2 (as shown in FIG. 6 ) obtained by the image sensor chip M3 in cooperation with the lens structure M2 is greater than the physical measurement distance D1 (as shown in FIG. 3 ), the lens position adjustment device 3 can smoothly Clockwise rotation adjusts the lens structure M2 (as shown by the clockwise arrow in FIG. 8 ), 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 from the image sensor chip. The actual distance L of the measuring chip M3 is equal to the focal length F of the lens of the lens structure M2, so that the focal point of the lens of the lens structure M2 will completely fall on the image sensing chip M3 (as shown in FIG. 10 ), and then the lens structure M2 can pass through the point Fix it inside the lens holder M1 by means of glue. However, the above-mentioned example is only one possible embodiment and is not intended to limit the present invention.

For example, as shown in FIG. 3 , FIG. 6 , FIG. 9 and FIG. 10 , the lens holder M1 has a left-handed internal thread M12, and the lens structure M2 has a left-handed external thread M22 cooperating with the left-handed internal thread M12. In this way, when the image measurement distance D2 (as shown in FIG. 6 ) obtained by the image sensor chip M3 in cooperation with the lens structure M2 is greater than the physical measurement distance D1 (as shown in FIG. 3 ), the lens position adjustment device 3 can be reversed. Adjust the lens structure M2 by clockwise rotation (as shown by the counterclockwise arrow in FIG. 9 ), so that the lens structure M2 gradually approaches the image sensor chip M3 in a counterclockwise rotation until the optical center point P of the lens structure M2 is at a distance from the image sensor chip. The actual distance L of the measuring chip M3 is equal to the focal length F of the lens of the lens structure M2, so that the focal point of the lens of the lens structure M2 will completely fall on the image sensing chip M3 (as shown in FIG. 10 ), and then the lens structure M2 can pass through the point Fix it inside the lens holder M1 by means of glue. However, the above-mentioned example is only one possible embodiment and is not intended to limit the present invention.

Further speaking, as shown in FIG. 3, FIG. 7, FIG. 11, FIG. 12 and FIG. When measuring the distance D1 (as shown in Figure 3), the actual distance L (vertical distance) between the optical center point P of the lens structure M2 (such as the optical center of the lens of the lens structure M2) and the image sensor chip M3 is smaller than the lens The lens focal length F of the structure M2 (that is, the lens of the lens structure M2 is far away from the focal length F of the lens of the image sensor chip M3), so the lens structure M2 can be adjusted through the rotation of the lens position adjustment device 3, so that the lens structure M2 gradually moves away from The direction of the image sensing chip M3 moves until the optical center point P of the lens structure M2 is apart from the actual distance L of the image sensing chip M3 equal to the lens focal length F of the lens structure M2 (that is to say, the focal point of the lens structure M2 will fall completely on the image sensing chip M3) (as shown in FIG. 13 ).

For example, as shown in FIG. 3, FIG. 7, FIG. 11 and FIG. 13, the lens holder M1 has a right-handed internal thread M11, and the lens structure M2 has a right-handed external thread M21 that cooperates with the right-handed internal thread M11 . In this way, when the image measurement distance D2 (as shown in FIG. 7 ) obtained by the image sensor chip M3 in cooperation with the lens structure M2 is smaller than the physical measurement distance D1 (as shown in FIG. 3 ), the lens position adjustment device 3 can be reversed. Adjust the lens structure M2 by clockwise rotation (as shown by the counterclockwise arrow in FIG. 11 ), so that the lens structure M2 gradually moves away from the image sensor chip M3 in a counterclockwise rotation until the optical center point P of the lens structure M2 is far away from the image sensor chip. The actual distance L of the measuring chip M3 is equal to the lens focal length F of the lens structure M2, so that the focal point of the lens of the lens structure M2 will completely fall on the image sensor chip M3 (as shown in FIG. 13 ), and then the lens structure M2 can pass through the point Fix it inside the lens holder M1 by means of glue. However, the above-mentioned example is only one possible embodiment and is not intended to limit the present invention.

For example, as shown in FIG. 3 , FIG. 7 , FIG. 12 and FIG. 13 , the lens holder M1 has a left-handed internal thread M12, and the lens structure M2 has a left-handed external thread M22 cooperating with the left-handed internal thread M12. In this way, when the image measurement distance D2 (as shown in FIG. 7 ) obtained by the image sensor chip M3 with the lens structure M2 is smaller than the physical measurement distance D1 (as shown in FIG. 3 ), the lens position adjustment device 3 can smoothly Clockwise rotation adjusts the lens structure M2 (as shown by the clockwise arrow in FIG. 12 ), 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 far away from the image sensor chip. The actual distance L of the measuring chip M3 is equal to the lens focal length F of the lens structure M2, so that the focal point of the lens of the lens structure M2 will completely fall on the image sensor chip M3 (as shown in FIG. 13 ), and then the lens structure M2 can pass through the point Fix it inside the lens holder M1 by means of glue. However, the above-mentioned example is only one possible embodiment and is not intended to limit the present invention.

[Second embodiment]

1 to 14, the second embodiment of the present invention provides a lens focusing method, which at least includes the following steps: first, as shown in FIG. 3, a chart display structure 20 is provided, and the chart display structure 20 includes each other A first physical graph 201 and a second physical graph 202 are separated, a first physical reference point 201P of the first physical graph 201 and a second physical reference point 202P of the second physical graph 202 are separated by a physical measurement Distance D1 (step S100); then, as shown in FIG. 1, FIG. 3, FIG. 6 and FIG. The second entity chart 202 obtains a chart image information 21 afterwards, and 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 corresponding to the second entity chart 202 chart 212, and 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, with FIG. 6 As shown in FIG. 13 , according to 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 an optical center point P of the lens structure M2 is separated from An actual distance L on the image sensor chip M3 is equal to a lens focal length F of the lens structure M2 (step S104 ).

Furthermore, as shown in FIG. 3, FIG. 6, FIG. 8, FIG. 9 and FIG. The actual distance L between the optical center point P of the lens structure M2 and the image sensor chip M3 is greater than the lens focal length F of the lens structure M2, so the lens structure M2 can be adjusted through rotation so that the lens structure M2 gradually approaches the image sensor chip M3 until the actual distance L between the optical center point P of the lens structure M2 and the image sensor chip M3 is equal to the lens focal length F of the lens structure M2.

Furthermore, as shown in FIG. 3 , FIG. 7 , FIG. 11 , FIG. 12 and FIG. 13 , when the image measurement distance D2 obtained by the image sensor chip M3 and the lens structure M2 is smaller than the physical measurement distance D1, due to The actual distance L between the optical center point P of the lens structure M2 and the image sensing chip M3 is smaller than the focal length of the lens of the lens structure M2, so the lens structure M2 can be adjusted through rotation, so that the lens structure M2 gradually moves away from the image sensing chip M3 direction until the actual distance L between the optical center point P of the lens structure M2 and the image sensor chip M3 is equal to the lens focal length F of the lens structure M2.

[Advantageous Effects of Embodiment]

One of the beneficial effects of the present invention is that a lens focusing system S provided by the present invention can be used to carry an image capture module M through "the object carrying device 1 to be tested, and the image capture module M includes a Lens bracket M1, a lens structure M2 movably arranged on the lens bracket M1, and an image sensor chip M3 corresponding to the lens structure M2", "The lens position prediction device 2 includes a graph display structure 20, and the graph display The structure 20 includes a first entity graph 201 and a second entity graph 202 separated from each other, and both a first entity reference point 201P of the first entity graph 201 and a second entity reference point 202P of the second entity graph 202 A distance from a physical measurement distance D1" and "the lens position adjustment device 3 is used to rotatably adjust the distance between the lens structure M2 and the image sensing chip M3", so that when the image sensing chip M3 cooperates with the lens structure M2 When the obtained image measurement distance D2 is greater than the physical measurement distance D1, the lens structure M2 can be adjusted through the rotation of the lens position adjustment device 3, so that the lens structure M2 gradually moves toward the direction close to the image sensor chip M3, and when the image When the image measurement distance D2 obtained by the sensing chip M3 and the lens structure M2 is smaller than the physical measurement distance D1, the lens structure M2 can be adjusted through the rotation of the lens position adjustment device 3, so that the lens structure M2 gradually moves away from the image sensing chip Move in the direction of M3.

Another beneficial effect of the present invention is that a lens focusing method provided by the present invention can be achieved by "providing a graph display structure 20, and the graph display structure 20 includes a first entity graph 201 and a second entity graph that are separated from each other. 202, a first physical reference point 201P of the first physical chart 201 and a second physical reference point 202P of the second physical chart 202 are separated by a physical measurement distance D1", "through an image sensor chip M3 to cooperate with a The lens structure M2 obtains a graph image information 21 after capturing both the first entity graph 201 and the second entity graph 202 of the graph display structure 20, and the graph image information 21 is used to provide a first entity graph 201 corresponding to An image graph 211 and a second image graph 212 corresponding to the second entity graph 202, and a first image reference point 211P of the first image graph 211 and a second image reference point 212P of the second image graph 212 are both A distance from an image measurement distance D2" and "according to 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 an optical distance of the lens structure M2 The actual distance L between the center point and the image sensor chip M3 is equal to the lens focal length F" of the lens structure M2, so that when the image sensor chip M3 cooperates with the lens structure M2, the image measurement distance D2 obtained is greater than the physical When measuring the distance D1, the lens structure M2 can be adjusted through the rotation of the lens position adjustment device 3, so that the lens structure M2 gradually moves toward the direction close to the image sensing chip M3, and when the image sensing chip M3 cooperates with the lens structure M2 to obtain When the image measurement distance D2 is smaller than the physical measurement distance D1, the lens structure M2 can be adjusted through the rotation of the lens position adjustment device 3, so that the lens structure M2 gradually moves away from the image sensor chip M3.

Another beneficial effect of the present invention is that a graph display structure 20 provided by the present invention can be set on the bottom layer 200 without a graph through "the first entity graph 201 and the second entity graph 202, so that the first entity graph 201, around the second entity graph 202, and without any graphs between the first entity graph 201 and the second entity graph 202", so that the graph display structure 20 can be applied to the present invention The lens focusing system S and the lens focusing method.

The content disclosed above is only a preferred feasible embodiment of the present invention, and does not therefore limit the scope of the patent application of the present invention. Therefore, all equivalent technical changes made by using the description and drawings of the present invention are included in the application of the present invention. within the scope of the patent.

S: lens focusing system

1: Object carrying device to be tested

2: Lens position prediction device

20: Diagram showing structure

200: No chart bottom layer

201: First Entity Chart

202: Second Entity Chart

201P: First Entity Reference Point

202P: Second entity reference point

201B: The first black area

201W: The first white area

202B: Second black area

202W: Second white area

2011: First Entity Center Point

2012: The first entity leftmost point

2013: First Entity Rightmost Point

2021: Second entity center point

2022: The leftmost point of the second entity

2023: Second Entity Rightmost Point

21: Chart image information

210: No chart bottom layer

211: First Image Chart

211P: first image reference point

212P: Second image reference point

2111: Center point of the first image

2112: The leftmost point of the first image

2113: The rightmost point of the first image

2121: Center point of the second image

2122: The leftmost point of the second image

2123: The rightmost point of the second image

3: Lens position adjustment device

D1: Entity measurement distance

D2: Image measurement distance

L: actual distance

M: Image capture module

M1: lens holder

M2: lens structure

M3: Image sensor chip

M11: Right hand internal thread

M12: Left-handed internal thread

M21: right hand external thread

M22: left-handed external thread

P: optical center point

F: lens focal length

FIG. 1 is a schematic diagram of a lens focusing system provided by a first embodiment of the present invention.

FIG. 2 is another schematic diagram of the lens focusing system provided by the first embodiment of the present invention.

FIG. 3 is a schematic diagram of an entity measuring distance provided by the graph display structure of the first embodiment of the present invention.

FIG. 4 is a schematic diagram of a first entity graph having a plurality of first black regions and a plurality of first white regions according to the first embodiment of the present invention.

FIG. 5 is a second entity chart according to the first embodiment of the present invention, which has a plurality of second black regions and a plurality of second white regions.

FIG. 6 is a schematic diagram of an image measuring distance provided by the chart image information according to the first embodiment of the present invention.

FIG. 7 is a schematic diagram of another image distance measurement provided by the chart image information according to the first embodiment of the present invention.

FIG. 8 is a schematic diagram of the lens position adjusting device clockwise rotating and adjusting the lens structure according to the first embodiment of the present invention, so that the lens structure gradually approaches the image sensor chip in a clockwise manner.

FIG. 9 is a schematic diagram of the lens position adjustment device rotating counterclockwise to adjust the lens structure so that the lens structure gradually approaches the image sensor chip in a counterclockwise manner according to the first embodiment of the present invention.

FIG. 10 is a schematic diagram showing that the actual distance between the optical center of the lens structure and the image sensing chip is equal to the lens focal length of the lens structure after the lens structure of FIG. 8 and FIG. 9 is adjusted through rotation.

FIG. 11 is a schematic diagram of the lens position adjustment device rotating counterclockwise to adjust the lens structure according to the first embodiment of the present invention, so that the lens structure gradually moves away from the image sensor chip in a counterclockwise manner.

FIG. 12 is a schematic diagram of the lens position adjusting device clockwise rotating and adjusting the lens structure according to the first embodiment of the present invention, so that the lens structure gradually moves away from the image sensor chip in a clockwise manner.

FIG. 13 is a schematic diagram showing that the actual distance between the optical center of the lens structure and the image sensing chip is equal to the lens focal length of the lens structure after the lens structure of FIG. 11 and FIG. 12 is adjusted through rotation.

FIG. 14 is a flow chart of the lens focusing method provided by the second embodiment of the present invention.

20: Diagram showing structure

200: No chart bottom layer

201: First Entity Chart

202: Second Entity Chart

201P: First Entity Reference Point

202P: Second entity reference point

2011: First Entity Center Point

2012: The first entity leftmost point

2013: First Entity Rightmost Point

2021: Second entity center point

2022: The leftmost point of the second entity

2023: Second Entity Rightmost Point

D1: Entity measurement distance

Claims (10)

A lens focusing system, which includes: an object-to-be-measured carrying device, the object-to-be-tested carrying device is used to carry an image capture module, the image capture module includes a lens bracket, which is movably arranged on the A lens structure on the lens bracket and an image sensing chip corresponding to the lens structure; a lens position prediction device, the lens position prediction device includes a graph display structure; and a lens position adjustment device, the The lens position adjustment device is used to rotatably adjust the distance between the lens structure and the image sensing chip; wherein, the graphic display structure includes a first entity graphic and a second entity graphic 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 are separated by a physical measurement distance; wherein, when the image sensor chip cooperates with the lens structure When obtaining a graph image information after retrieving both the first entity graph and the second entity graph of the graph display structure, the graph image information is used to provide an image corresponding to the first entity graph A first image graph and a second image graph corresponding to the second entity graph, and a first image reference point of the first image graph and a second image reference point of the second image graph are separated by an image measurement distance; wherein, when the image measurement distance obtained by the image sensor chip in cooperation with the lens structure is greater than the physical measurement distance, due to an optical center point of the lens structure An actual distance away from the image sensor chip is greater than a lens focal length of the lens structure, so the lens structure is adjusted through the rotation of the lens position adjustment device, so that the lens structure gradually approaches the image Sensing the orientation of the wafer moves until the mirror The actual distance between the optical center point of the head structure and the image sensor chip is equal to the lens focal length of the lens structure; wherein, when the image sensor chip matches the lens structure, the obtained When the image measurement distance is smaller than the physical measurement distance, since the actual distance between the optical center point of the lens structure and the image sensing chip is smaller than the lens focal length of the lens structure, The lens structure is adjusted through the rotation of the lens position adjustment device, so that the lens structure gradually moves away from the image sensor chip until the optical center point of the lens structure is far away from the image The actual distance of the sensing wafer is equal to the lens focal length of the lens structure. The lens focusing system according to claim 1, wherein the lens holder has a right-handed internal thread, and the lens structure has a right-handed external thread that cooperates with the right-handed internal thread; wherein, when the When the image measurement distance acquired by the image sensing chip in cooperation 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 is gradually approaching the image sensing wafer in a clockwise rotation until the actual distance between the optical center point of the lens structure and the image sensing wafer is equal to the focal length of the lens of the lens structure; wherein , when the image measurement distance acquired by the image sensing chip with the lens structure is smaller than the physical measurement distance, the lens position adjustment device rotates and adjusts the lens structure counterclockwise, so that the The lens structure rotates counterclockwise gradually 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 of the lens structure focal length. The lens focusing system according to claim 1, wherein the lens holder has a left-handed internal thread, and the lens structure has a left-handed external thread that cooperates with the left-handed internal thread; wherein, when the image sensor When the measurement distance of the image obtained by measuring the wafer with the lens structure is greater than the physical measurement distance, the lens position adjustment device rotates the lens structure counterclockwise so that the lens structure rotates counterclockwise gradually approaching the image sensing wafer in a manner until the actual distance between the optical center point of the lens structure and the image sensing wafer is equal to the focal length of the lens of the lens structure; wherein, when the When the image measurement distance acquired by the image sensing chip in cooperation with the lens structure is smaller than the physical measurement distance, the lens position adjustment device rotates clockwise to adjust the lens structure, so that the lens structure is Rotate clockwise gradually away from the image sensing wafer until the actual distance between the optical center of the lens structure and the image sensing wafer is equal to the lens focal length of the lens structure. The lens focusing system according to claim 1, wherein the graph display structure includes a graph-free bottom layer, and the first entity graph and the second entity graph are arranged on the graph-free bottom layer, so that all There are no graphs around the first entity graph, around the second entity graph, or between the first entity graph and the second entity graph; wherein, the first entity graph has multiple A first black area and a plurality of first white areas, and the second entity chart has a plurality of second black areas and a plurality of second white areas; wherein, the first black area of the first entity chart is the same as The area sizes of the second black regions of the second entity charts are the same or different, and The first white area of the first entity chart is the same or different from the second white area of the second entity chart; wherein, the first entity of the first entity chart refers to The point is a center point of a first entity, a leftmost point of a first entity, or a rightmost point of a first entity, and the second entity reference point of the second entity graph is a center point of a second entity, a first entity Two entity leftmost points or a second entity rightmost point; wherein, the distance between the first entity reference point of the first entity graph and the second entity reference point of the second entity graph The entity measurement distance 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 graph from the second entity The distance of one of the center point of the second entity, the leftmost point of the second entity, or the rightmost point of the second entity in the chart; wherein, the first image reference of the first image chart point 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 first image The leftmost point of two images or the rightmost point of a second image; wherein, the distance between the first image reference point of the first image chart and the second image reference point of the second image chart The image measurement distance is the distance between one of the center point of the first image, the leftmost point of the first image, and the rightmost point of the first image of the first image chart from the second image The distance of one of the center point of the second image, the leftmost point of the second image, or the rightmost point of the second image in the chart. A lens focusing method, which includes: providing a graph display structure, the graph display structure includes a first entity graph and a second entity graph separated from each other, a first entity reference point of the first entity graph and the A second entity reference to the second entity graph The two points are separated by a physical measurement distance; through an image sensing chip and a lens structure to capture both the first physical graph and the second physical graph of the graph display structure to obtain a graph 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 chart of the first image chart An image reference point is separated from a second image reference point of the second image chart by an image measurement distance; and according to a comparison between the physical measurement distance and the image measurement distance, the lens structure is Gradually moving toward or away from the image sensing chip until an actual distance between an optical center point of the lens structure and the image sensing chip is equal to a lens focal length of the lens structure; wherein, when When the image measurement distance obtained by the image sensing chip with the lens structure is greater than the physical measurement distance, since the optical center point of the lens structure is far from the image sensing chip The actual distance is greater than the focal length of the lens of the lens structure, so the lens structure is adjusted through rotation, so that the lens structure gradually moves towards the direction close to the image sensing chip until the lens structure of the lens structure The actual distance between the optical center point and the image sensor chip is equal to the lens focal length of the lens structure; wherein, when the image sensor chip cooperates with the lens structure to obtain the image measurement distance When it 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 smaller than the lens focal length of the lens structure, the lens structure passes through rotating and adjusting, 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 The lens focal length of the lens structure. The lens focusing method according to claim 5, wherein the lens holder has a right-handed internal thread, and the lens structure has a right-handed external thread that cooperates with the right-handed internal thread; wherein, when the When the image measurement distance obtained by the image sensing chip in cooperation with the lens structure is greater than the physical measurement distance, the lens structure is adjusted clockwise so that the lens structure gradually rotates clockwise. approaching the image sensing wafer until the actual distance between the optical center point of the lens structure and the image sensing wafer is equal to the focal length of the lens of the lens structure; wherein, when the image sensing When the measurement distance of the image acquired by the measuring wafer with the lens structure is smaller than the physical measurement distance, the lens structure is rotated counterclockwise to adjust the lens structure so that the lens structure gradually moves away from the 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. The lens focusing method according to claim 5, wherein the lens holder has a left-handed internal thread, and the lens structure has a left-handed external thread that cooperates with the left-handed internal thread; wherein, when the image sensor When the measurement distance of the image acquired by the measuring wafer with the lens structure is greater than the physical measurement distance, the lens structure is rotated counterclockwise to adjust the lens structure so that the lens structure gradually approaches the an image sensing wafer, until the actual distance between the optical center point of the lens structure and the image sensing wafer is equal to the lens focal length of the lens structure; Wherein, when the image measurement distance acquired by the image sensing chip with the lens structure is smaller than the physical measurement distance, the lens structure is adjusted clockwise so that the lens structure moves clockwise The method of rotating 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 lens focal length of the lens structure. The lens focusing method according to claim 5, wherein the graph display structure includes a graph-free bottom layer, and the first entity graph and the second entity graph are arranged on the graph-free bottom layer, so that all There are no graphs around the first entity graph, around the second entity graph, or between the first entity graph and the second entity graph; wherein, the first entity graph has multiple A first black area and a plurality of first white areas, and the second entity chart has a plurality of second black areas and a plurality of second white areas; wherein, the first black area of the first entity chart is the same as The second black area of the second entity chart has the same or different area size, and the first white area of the first entity chart is the same as the second white area of the second entity chart The area sizes are the same or different; 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 The second entity reference point of the second entity graph is a second entity center point, a second entity leftmost point or a second entity rightmost point; wherein, the first entity graph of the first entity The entity measurement distance between the reference point and the second entity reference point of the second entity graph is the first entity center point of the first entity graph, the second entity graph One of the leftmost point of an entity and the rightmost point of the first entity is far from the center point of the second entity, the leftmost point of the second entity, or the most The distance between one of the three right points; wherein, the first image reference point of the first image chart is a center point of the first image, a leftmost point of the first image or a rightmost point of the first image, And the second image reference point of the second image chart is a center point of a second image, a leftmost point of a second image or a rightmost point of a second image; wherein, the The image measurement distance between the first image reference point and the second image reference point of the second image chart is the first image center point of the first image chart, the second image chart One of the leftmost point of an image and the rightmost point of the first image is far from the center point of the second image, the leftmost point of the second image, or the most Right-click the distance to one of the three. A graph display structure, which includes a bottom layer without graph, a first entity graph and a second entity graph, and the first entity graph and the second entity graph are arranged on the graph-free bottom layer, so that all There are no graphs around the first entity graph, around the second entity graph, or between the first entity graph and the second entity graph; wherein, the first entity graph has multiple A first black area and a plurality of first white areas, and the second entity chart has a plurality of second black areas and a plurality of second white areas. The graph display structure according to claim 9, wherein, the graphs provided by the graph display structure only have the first entity graph and the second entity graph; wherein, the first entity graph of the first entity graph black area with the second solid The area size of the second black area of the volume chart is the same or different, and the area size of the first white area of the first entity chart is the same as or the area size of the second white area of the second entity chart different; 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; wherein, when an image sensor chip cooperates When a camera structure captures both the first entity graph and the second entity graph of the graph display structure to obtain a graph image information, the graph image information is used to provide information corresponding to the first a first image graph of the entity graph and a second image graph corresponding to the second entity graph, and a first image reference point of the first image graph and a second image of the second image graph The distance between the two reference points is an image measurement distance; wherein, when the image measurement distance obtained by the image sensor chip in cooperation with the lens structure is greater than the physical measurement distance, due to an image measurement distance of the lens structure An actual distance between the optical center point and the image sensor chip is greater than a lens focal length of the lens structure, so the lens structure is adjusted by rotation, so that the lens structure gradually approaches the image sensor chip moving in a direction until the actual distance between the optical center point of the lens structure and the image sensor chip is equal to the focal length of the lens of the lens structure; wherein, when the image sensor chip cooperates with the When the image measurement distance obtained by the lens structure is smaller than the physical measurement distance, since the actual distance between the optical center point of the lens structure and the image sensing chip is smaller than the actual distance of the lens structure The focal length of the lens, so the lens structure is adjusted by rotation, so that the lens structure gradually moves away from the image sensor chip until the optical center point of the lens structure is far away from the image sensor chip. The actual distance of the measured wafer is equal to the The lens focal length of the lens structure.

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