CN115883950A - Lens focusing system, lens focusing method and chart display structure - Google Patents
Lens focusing system, lens focusing method and chart display structure Download PDFInfo
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- CN115883950A CN115883950A CN202111186285.9A CN202111186285A CN115883950A CN 115883950 A CN115883950 A CN 115883950A CN 202111186285 A CN202111186285 A CN 202111186285A CN 115883950 A CN115883950 A CN 115883950A
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Abstract
The invention discloses a lens focusing system, a lens focusing method and a chart display structure. The lens focusing system comprises a bearing device of an object to be detected, a lens position prejudging device and a lens position adjusting device. The object bearing device to be tested is used for bearing 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 graph display structure is used for providing a physical measurement distance and an image measurement distance. Therefore, according to the comparison between the entity measurement distance and the image measurement distance, the lens structure can gradually move towards the direction close to or away from the image sensing chip until an actual distance between an optical central point of the lens structure and the image sensing chip is equal to a lens focal length of the lens structure.
Description
Technical Field
The present 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 graph display structure.
Background
In the prior art, the image extraction module includes a lens holder and a lens assembly, and the lens assembly needs to be focused in advance before being fixed on the lens holder. However, the focusing system and the focusing method of the lens assembly in the prior art still have the room for improvement.
Disclosure of Invention
The present invention provides a lens focusing system, a lens focusing method and a graph display structure for overcoming the disadvantages of the prior art.
In order to solve the above technical problems, one of the technical solutions of the present invention is to provide a lens focusing system, which includes a device for bearing an object to be measured, a lens position pre-judging device, and a lens position adjusting device. The object bearing device to be tested is used for bearing an image extraction module, and the image extraction module comprises 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 pre-judging device comprises a chart display structure. The lens position adjusting device is used for rotatably adjusting the distance between the lens structure and the image sensing chip. The graph display structure comprises a first entity graph and a second entity graph which are separated from each other, and a first entity reference point of the first entity graph and a second entity reference point of the second entity graph are separated from each other by an entity measurement distance. When the image sensing chip is matched with the lens structure to extract the first entity graph and the second entity graph of the graph display structure so as to obtain graph image information, the graph image information is used for providing a first image graph corresponding to the first entity graph and a second image graph corresponding to the second entity graph, and an image measuring distance is kept between a first image reference point of the first image graph and a second image reference point of the second image graph. When the image measuring distance obtained by the image sensing chip cooperating with the lens structure is greater than the physical measuring distance, an actual distance between an optical center point of the lens structure and the image sensing chip is greater than a lens focal length of the lens structure, so that the lens structure gradually moves towards the direction close to the image sensing chip through the rotation adjustment of the lens position adjusting device 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. When the image measuring distance obtained by the image sensing chip cooperating with the lens structure is smaller than the physical measuring distance, 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, so that the lens structure gradually moves towards the direction far away from the image sensing chip through the rotation adjustment of the lens position adjusting device 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.
In order to solve the above technical problem, another technical solution adopted by the present invention is to provide a lens focusing method, including: providing a chart display structure, wherein the chart display structure comprises a first entity chart and a second entity chart which 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 from each other by an entity measurement distance; obtaining graph image information by matching an image sensing chip with a lens structure to extract a first entity graph and a second entity graph of a graph display structure, wherein the graph image information is used for providing a first image graph corresponding to the first entity graph and a second image graph corresponding to the second entity graph, and an image measurement distance is kept between a first image reference point of the first image graph and a second image reference point of the second image graph; and gradually moving the lens structure toward a direction approaching or separating from the image sensing chip according to the comparison between the entity measurement distance and the image measurement distance until an actual distance between an optical central point of the lens structure and the image sensing chip is equal to a lens focal length of the lens structure. When the image measuring distance obtained by the image sensing chip cooperating with the lens structure is greater than the physical measuring distance, the actual distance between the optical center point of the lens structure and the image sensing chip is greater than the lens focal length of the lens structure, so that the lens structure gradually moves towards the direction close to the image sensing chip by rotation adjustment 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. When the image measuring distance obtained by the image sensing chip cooperating with the lens structure is smaller than the physical measuring distance, 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, so that the lens structure is adjusted by rotation to gradually move towards the direction far 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.
In order to solve the above technical problem, another technical solution of the present invention is to provide a diagram display structure, which includes a chart-free bottom layer, a first entity diagram and a second entity diagram, wherein the first entity diagram and the second entity diagram are disposed on the chart-free bottom layer, so that there is no diagram around the first entity diagram, around the second entity diagram, and between the first entity diagram and the second entity diagram.
One of the benefits of the present invention is that the lens focusing system provided by the present invention can use the "object-to-be-detected carrying device for carrying an image capturing module, and the image capturing module includes a lens holder, a lens structure movably disposed on the lens holder, and an image sensing chip corresponding to the lens structure, and the" lens position pre-determining device includes a graph display structure, and the graph display structure includes a first entity graph and a second entity graph separated from each other, and a first entity reference point of the first entity graph and a second entity reference point of the second entity graph are separated by a entity measurement distance ", and the" lens position adjusting device is used for rotatably adjusting the distance between the lens structure and the image sensing chip ", so that when the image measurement distance obtained by the image sensing chip in cooperation with the lens structure is greater than the entity measurement distance, the lens structure can be adjusted by rotation of the lens position adjusting device, so that the lens structure gradually moves toward the image sensing chip, and when the image measurement distance obtained by the image sensing chip in cooperation with the lens structure is smaller than the entity measurement distance, the lens structure can gradually move toward the direction of the lens structure moving away from the image sensing chip.
Another advantage of the present invention is that the lens focusing method provided by the present invention, the method can obtain a chart image information by providing a chart display structure which comprises a first entity chart and a second entity chart which 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 measuring distance, and extracting the first entity chart and the second entity chart of the chart display structure by matching an image sensing chip with a lens structure, the chart image information is used for providing 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, and the lens structure is gradually moved towards the direction close to 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 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, so that when the image measuring distance obtained by the image sensing chip cooperating with the lens structure is greater than the physical measuring distance, the lens structure can be adjusted by the rotation of the lens position adjusting device, so that the lens structure gradually moves towards the direction approaching the image sensing chip, and when the image measuring distance obtained by the image sensing chip matched with the lens structure is smaller than the physical measuring distance, the lens structure can be adjusted by the rotation of the lens position adjusting device, so that the lens structure gradually moves towards the direction far away from the image sensing chip.
Another advantage of the present invention is that the graph display structure provided by the present invention can be applied to the lens focusing system and the lens focusing method provided by the present invention by a technical solution that "the first entity graph and the second entity graph are disposed on the graph-free bottom layer, so that there is no graph around the first entity graph, around the second entity graph, and between the first entity graph and the second entity graph".
For a better understanding of the nature and technical content of the present invention, reference should be made to the following detailed description of the invention, taken in conjunction with the accompanying drawings, which are provided for purposes of illustration and description, and not for purposes of limitation.
Drawings
Fig. 1 is a schematic view of a lens focusing system according to a first embodiment of the invention.
Fig. 2 is another schematic view of a lens focusing system according to a first embodiment of the invention.
FIG. 3 is a diagram illustrating a physical distance measurement provided by the graphical display structure according to the first embodiment of the present invention.
FIG. 4 is a diagram of a first entity diagram having a plurality of first black areas and a plurality of first white areas according to a first embodiment of the present invention.
FIG. 5 is a second solid chart with a plurality of second black areas and a plurality of second white areas according to the first embodiment of the present invention.
FIG. 6 is a diagram illustrating an image measurement distance provided by the graph image information according to the first embodiment of the present invention.
FIG. 7 is a diagram of another image measurement distance provided by the graph image information according to the first embodiment of the present invention.
Fig. 8 is a schematic view illustrating the lens position adjusting apparatus according to the first embodiment of the invention adjusting the lens structure by rotating clockwise, so that the lens structure gradually approaches the image sensor chip by rotating clockwise.
Fig. 9 is a schematic diagram illustrating the lens position adjusting apparatus according to the first embodiment of the present invention adjusting the lens structure by rotating counterclockwise, so that the lens structure gradually approaches the image sensor chip by rotating counterclockwise.
Fig. 10 is a schematic view illustrating that after the lens structures of fig. 8 and 9 are rotationally adjusted, 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.
Fig. 11 is a schematic view illustrating the lens position adjusting apparatus according to the first embodiment of the invention adjusting the lens structure by rotating counterclockwise, so that the lens structure gradually moves away from the image sensing chip by rotating counterclockwise.
Fig. 12 is a schematic view illustrating the lens position adjusting apparatus according to the first embodiment of the invention rotating clockwise to adjust the lens structure such that the lens structure gradually moves away from the image sensing chip in a clockwise rotation manner.
Fig. 13 is a schematic view illustrating that after the lens structures of fig. 11 and 12 are rotationally adjusted, 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.
Fig. 14 is a flowchart of a lens focusing method according to a second embodiment of the invention.
Detailed Description
The following description is provided with specific embodiments of the present disclosure on "lens focusing system, lens focusing method and structure of displaying diagram", and those skilled in the art can understand the advantages and effects of the present disclosure from the disclosure of the present disclosure. The invention is capable of other and different embodiments and its several details are capable of modifications and variations in various respects, all without departing from the present invention. It should be noted that the drawings of the present invention are merely schematic illustrations and are not drawn to actual dimensions. The following embodiments will further explain the related art of the present invention in detail, but the disclosure is not intended to limit the scope of the present invention. In addition, the term "or" as used herein should be taken to include any one or combination of more of the associated listed items as the case may be.
[ first embodiment ]
Referring to fig. 1 to 14, a lens focusing system S according to a first embodiment of the present invention includes: a device for bearing an object to be measured 1, a device for pre-judging lens position 2 and a device for adjusting lens position 3.
First, referring to fig. 1 and fig. 2, the object bearing device 1 may be used to bear an image capturing module M, and the image capturing module M may at least include a lens holder M1, a lens structure M2 (or lens assembly) movably disposed on the lens holder M1, and an image sensing chip M3 corresponding to the lens structure M2. In addition, the lens position pre-judging device 2 includes a chart display structure 20, and the lens position adjusting device 3 can be used for rotatably adjusting the distance between the lens structure M2 and the image sensing chip M3. For example, the object supporting Device 1 may be any fixing Device or holding Device that can be used to position or fix the image capturing module M, the lens structure M2 may include a protective housing movably disposed inside the lens holder M1 and at least one lens (or a lens set composed of a plurality of lenses) disposed inside the protective housing, and the image sensing chip M3 may be a Charge-coupled Device (CCD) or a Complementary Metal-Oxide-Semiconductor (CMOS) sensor. In addition, the lens position pre-determining 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. In addition, the lens position adjusting 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 adjusting device 3 may be mutually matched with the clamping mechanism and the driving motor 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 examples are only one possible embodiment and are not intended to limit the present invention.
More specifically, referring to fig. 3, 4 and 5, the graph display structure 20 includes a first entity graph 201 (or first entity pattern) and a second entity graph 202 (or second entity pattern) separated from each other, and 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 are separated by a entity measurement distance D1. For example, as shown in FIG. 3, the graph display structure 20 includes a diagram-free bottom layer 200 (i.e., a region without any pattern and being blank), and the first entity diagram 201 and the second entity diagram 202 are disposed on the diagram-free bottom layer 200 such that there is no diagram around the first entity diagram 201, around the second entity diagram 202, and between the first entity diagram 201 and the second entity diagram 202 (i.e., the graph display structure 20 provides diagrams with only the first entity diagram 201 and the second entity diagram 201, and the remaining regions except the first entity diagram 201 and the second entity diagram 201 are blank and without any pattern). Furthermore, as shown in fig. 4 and fig. 5, the first physical diagram 201 has a plurality of first black regions 201B and a plurality of first white regions 201W, and the second physical diagram 202 has a plurality of second black regions 202B and a plurality of second white regions 202W. In addition, the area sizes (or shape sizes) of the first black region 201B of the first entity diagram 201 and the second black region 202B of the second entity diagram 202 may be the same or different, and the area sizes (or shape sizes) of the first white region 201W of the first entity diagram 201 and the second white region 202W of the second entity diagram 202 may be the same or different. However, the above-mentioned examples are only one possible embodiment and are not intended to limit the present invention.
It is noted that, for example, in conjunction with fig. 3, fig. 4 and fig. 5, the first entity reference point 201P of the first entity diagram 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 diagram 202 may be a second entity center point 2021, a second entity leftmost point 2022, a second entity rightmost point 2023 or any other point. Moreover, the measured physical distance D1 between the first entity reference point 201P of the first entity diagram 201 and the second entity reference point 202P of the second entity diagram 202 may be a distance between the first entity center point 2011, the first entity leftmost point 2012, and the first entity rightmost point 2013 of the first entity diagram 201 and the second entity center point 2021, the second entity leftmost point 2022, or the second entity rightmost point 2023 of the second entity diagram 202 (e.g., the measured physical distance D1 shown in FIG. 3 is a distance between the first entity center point 2011 of the first entity diagram 201 and the second entity center point 2021 of the second entity diagram 202). However, the above-mentioned examples are only one possible embodiment and are not intended to limit the present invention.
Furthermore, as shown in fig. 1, 3, 6 and 7, when the image sensor chip M3 cooperates with the lens structure M2 to extract both the first physical graph 201 and the second physical graph 202 of the graph display structure 20 to obtain the graph image information 21, the graph image information 21 can be used to provide a first image graph 211 (or a first virtual graph) corresponding to the first physical graph 201 and a second image graph 212 (or a second virtual graph) corresponding to the second physical graph 202, and an image measurement distance D2 is between 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. In addition, the first image graph 211 and the second image graph 212 are formed on the chart-free bottom layer 210, so that there is no chart around the first image graph 211, around the second image graph 212, and between the first image graph 211 and the second image graph 212. For example, the first image reference point 211P of the first image graph 211 may be a first image center point 2111, a first image leftmost point 2112, a first image rightmost point 2113, or any other point, and the second image reference point 212P of the second image graph 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. Furthermore, the image measurement distance D2 between the first image reference point 211P of the first image graph 211 and the second image reference point 212P of the second image graph 212 may be a distance "one of the first image center point 2111, the first image leftmost point 2112 and the first image rightmost point 2113 of the first image graph 211 is" apart "from 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 graph 212" (for example, the image measurement distance D2 shown in FIG. 6 or FIG. 7 is a distance between the first image center point 2111 of the first image graph 211 and the second image center point 2121 of the second image graph 212). However, the above-mentioned examples are only one possible embodiment and are not intended to limit the present invention.
Furthermore, as shown in fig. 3, 6, 8, 9 and 10, when the image measurement distance D2 (shown in fig. 6) obtained by the image sensing chip M3 in cooperation with the lens structure M2 is greater than the physical measurement distance D1 (shown in fig. 3), since an actual distance L (vertical distance) between an optical center point P of the lens structure M2 (e.g., an optical center of a lens of the lens structure M2) and the image sensing chip M3 is greater than a lens focal length F of the lens structure M2 (i.e., the lens of the lens structure M2 is spaced from the lens focal length F of the image sensing chip M3), the lens structure M2 can be adjusted by rotating the lens position adjusting device 3, so that the lens structure M2 gradually moves toward 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 (i.e., a focal point of the lens structure M2 completely falls on the image sensing chip M3) (shown in fig. 10).
For example, as shown in fig. 3, 6, 8 and 10, the lens holder M1 has a right-handed internal thread M11, and the lens structure M2 has a right-handed external thread M21 cooperating with the right-handed internal thread M11. Therefore, when the image measurement distance D2 (as shown in fig. 6) obtained by the image sensing chip M3 cooperating with the lens structure M2 is greater than the physical measurement distance D1 (as shown in fig. 3), the lens position adjusting device 3 can rotate clockwise to adjust the lens structure M2 (as shown by a clockwise arrow in fig. 8), so that the lens structure M2 gradually approaches the image sensing chip M3 in a clockwise rotation manner, 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, so that the lens focal point of the lens structure M2 completely falls on the image sensing chip M3 (as shown in fig. 10), and then the lens structure M2 can be fixed inside the lens holder M1 in a dispensing manner. However, the above-mentioned examples are only one possible embodiment and are not intended to limit the present invention.
For example, as shown in fig. 3, 6, 9 and 10, the lens holder M1 has a left-handed internal thread M12, and the lens structure M2 has a left-handed external thread M22 that is engaged with the left-handed internal thread M12. Therefore, when the image measurement distance D2 (as shown in fig. 6) obtained by the image sensing chip M3 cooperating with the lens structure M2 is greater than the physical measurement distance D1 (as shown in fig. 3), the lens position adjusting device 3 can rotate the lens structure M2 counterclockwise (as shown by the counterclockwise arrow in fig. 9), so that the lens structure M2 gradually approaches the image sensing chip M3 in a counterclockwise rotation manner 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, so that the lens focal point of the lens structure M2 completely falls on the image sensing chip M3 (as shown in fig. 10), and then the lens structure M2 can be fixed inside the lens holder M1 in a dispensing manner. However, the above-mentioned examples are only one possible embodiment and are not intended to limit the present invention.
More specifically, as shown in fig. 3, 7, 11, 12 and 13, when the image measurement distance D2 (shown in fig. 7) obtained by the image sensing chip M3 in cooperation with the lens structure M2 is smaller than the physical measurement distance D1 (shown in fig. 3), since the actual distance L (vertical distance) between the optical center point P of the lens structure M2 (e.g., the optical center of the lens structure M2) and the image sensing chip M3 is smaller than the lens focal length F of the lens structure M2 (i.e., the lens of the lens structure M2 is spaced from the lens focal length F of the image sensing chip M3), the lens structure M2 can be adjusted by the rotation of the lens position adjusting device 3, 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 lens focal length F of the lens structure M2 (i.e., the focal point P of the lens structure M2 completely falls on the image sensing chip M3) (shown in fig. 13).
For example, as shown in fig. 3, 7, 11 and 13, the lens holder M1 has a right-handed internal thread M11, and the lens structure M2 has a right-handed external thread M21 cooperating with the right-handed internal thread M11. Therefore, when the image measurement distance D2 (as shown in fig. 7) obtained by the image sensing chip M3 cooperating with the lens structure M2 is smaller than the physical measurement distance D1 (as shown in fig. 3), the lens position adjusting device 3 can rotate the lens structure M2 counterclockwise (as shown by the counterclockwise arrow in fig. 11), so that the lens structure M2 gradually moves away from the image sensing chip M3 in the counterclockwise rotation manner 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, so that the lens focal point of the lens structure M2 completely falls on the image sensing chip M3 (as shown in fig. 13), and then the lens structure M2 can be fixed inside the lens holder M1 in a dispensing manner. However, the above-mentioned examples are only one possible embodiment and are not intended to limit the present invention.
For example, as shown in fig. 3, 7, 12 and 13, the lens holder M1 has a left-handed internal thread M12, and the lens structure M2 has a left-handed external thread M22 that is engaged with the left-handed internal thread M12. Therefore, when the image measurement distance D2 (as shown in fig. 7) obtained by the image sensing chip M3 cooperating with the lens structure M2 is smaller than the physical measurement distance D1 (as shown in fig. 3), the lens position adjusting device 3 can rotate clockwise to adjust the lens structure M2 (as shown by the clockwise arrow of fig. 12), so that the lens structure M2 gradually moves away from the image sensing chip M3 in a clockwise rotation manner 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, so that the lens focal point of the lens structure M2 completely falls on the image sensing chip M3 (as shown in fig. 13), and then the lens structure M2 can be fixed inside the lens holder M1 in a dispensing manner. However, the above-mentioned examples are only one possible embodiment and are not intended to limit the present invention.
[ second embodiment ]
Referring to fig. 1 to 14, a second embodiment of the invention provides a lens focusing method, which at least includes the following steps: first, as shown in FIG. 3, a graph display structure 20 is provided, in which the graph display structure 20 includes a first entity graph 201 and a second entity graph 202 separated from each other, and 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 are separated by a measured entity distance D1 (step S100); next, as shown in fig. 1, 3, 6 and 7, an image sensing chip M3 is used in conjunction with a lens structure M2 to extract both the first entity diagram 201 and the second entity diagram 202 of the diagram display structure 20 to obtain diagram image information 21, where the diagram image information 21 is used to provide a first image diagram 211 corresponding to the first entity diagram 201 and a second image diagram 212 corresponding to the second entity diagram 202, and a first image reference point 211P of the first image diagram 211 and a second image reference point 212P of the second image diagram 212 are separated by an image measurement distance D2 (step S102); then, as shown in fig. 6 to 13, the lens structure M2 is gradually moved toward the direction approaching or separating from the image sensor chip M3 according to the comparison between the physically measured distance D1 and the image measured distance D2 until an actual distance L between an optical center point P of the lens structure M2 and the image sensor chip M3 is equal to a lens focal length F of the lens structure M2 (step S104).
More specifically, referring to fig. 3, 6, 8, 9 and 10, when the image measurement distance D2 obtained by the image sensing chip M3 in cooperation with the lens structure M2 is greater than the physically measured 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 adjusted by rotation, so that the lens structure M2 gradually moves toward the direction approaching 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.
More specifically, referring to fig. 3, 7, 11, 12 and 13, when the image measurement distance D2 obtained by the image sensing chip M3 in cooperation with the lens structure M2 is smaller than the physically measured 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 smaller than the lens focal length of the lens structure M2, the lens structure M2 can be adjusted by rotation, so that the lens structure M2 gradually moves in a direction 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 lens focal length F of the lens structure M2.
[ advantageous effects of the embodiments ]
One of the advantages of the present invention is that the lens focusing system S provided by the present invention can be used for carrying an image capturing module M by "the object-to-be-measured carrying device 1, and the image capturing module M includes a lens holder M1, a lens structure M2 movably disposed on the lens holder M1, and an image sensing chip M3 corresponding to the lens structure M2", and the "lens position pre-determining device 2 includes a graph display structure 20, and the graph display structure 20 includes a first entity graph 201 and a second entity graph 202 separated from each other, and 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 are separated by a entity measurement distance D1", and the "the lens position adjusting device 3 is used for rotatably adjusting the distance between the lens structure M2 and the image sensing chip M3", so that when the image measurement distance D2 obtained by the image sensing chip M3 cooperating with the lens structure M2 is greater than the entity measurement distance D1, the lens structure M2 can be adjusted by rotating the adjustment structure so that the lens structure M2 can be moved toward the image sensing chip M3, and the image sensing chip can be moved toward the image sensing chip by rotating the lens structure, so that when the image sensing chip is moved toward the image sensing chip, the image sensing chip is moved toward the image sensing chip by the lens structure M3.
Another advantage of the present invention is that the present invention provides a lens focusing method, which can obtain a chart image information 21 by "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, 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 a entity measurement distance D1", "extracting both the first entity chart 201 and the second entity chart 202 of the chart display structure 20 by an image sensing chip M3 in cooperation with a lens structure M2, the chart image information 21 is used for providing 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, 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 separated by an image measurement distance D2" and "the lens structure M2 is gradually moved toward or away from the image sensing chip M3 according to the comparison between the physical measurement distance D1 and the image measurement distance D2 until an actual distance L between an optical center point of the lens structure M2 and the image sensing chip M3 is equal to a lens focal length F of the lens structure M2", such that when the image measurement distance D2 obtained by the image sensing chip M3 in cooperation with the lens structure M2 is greater than the physical measurement distance D1, the lens structure M2 can be adjusted by the rotation of the lens position adjusting device 3, such that the lens structure M2 is gradually moved toward the image sensing chip M3, and when the image measurement distance D2 obtained by the image sensing chip M3 in cooperation 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 adjusting device 3, so that the lens structure M2 gradually moves away from the image sensing chip M3.
Another advantage 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 the lens focusing method provided by the present invention by the technical solution that "the first entity chart 201 and the second entity chart 202 are disposed 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".
The disclosure is only a preferred embodiment of the invention, and is not intended to limit the scope of the claims, so that all technical equivalents and modifications using the contents of the specification and drawings are included in the scope of the claims.
Claims (10)
1. A lens focusing system, comprising:
the device comprises a bearing device of an object to be detected, a detection module and a control module, wherein the bearing device of the object to be detected is used for bearing an image extraction module, and the image extraction module comprises a lens bracket, a lens structure which is movably arranged on the lens bracket and an image sensing chip which corresponds to the lens structure;
a lens position pre-judging device, wherein the lens position pre-judging device comprises a chart display structure; and
the lens position adjusting device is used for rotatably adjusting the distance between the lens structure and the image sensing chip;
wherein the graph display structure comprises a first entity graph and a second entity graph that are separated from each other, and a first entity reference point of the first entity graph and a second entity reference point of the second entity graph are separated by an entity measurement distance;
when the image sensing chip is matched with the lens structure to extract the first entity graph and the second entity graph of the graph display structure so as to obtain graph image information, the graph image information is used for providing 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 graph and a second image reference point of the second image graph are separated by an image measuring distance;
when the image measuring distance obtained by the image sensing chip cooperating with the lens structure is greater than the physical measuring distance, since an actual distance between an optical center point of the lens structure and the image sensing chip is greater than a lens focal length of the lens structure, the lens structure is adjusted by the rotation of the lens position adjusting device, so that the lens structure gradually moves towards a direction approaching 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;
when the image measuring distance obtained by the image sensing chip cooperating with the lens structure is smaller than the physical measuring distance, 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, so that the lens structure is adjusted by the rotation of the lens position adjusting 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 lens focal length of the lens structure.
2. The lens focusing system of claim 1,
the lens structure is provided with a right-handed external thread matched with the right-handed internal thread;
when the image measuring distance obtained by the image sensing chip matching with the lens structure is greater than the physical measuring distance, the lens position adjusting device rotates clockwise to adjust the lens structure, so that the lens structure gradually approaches to 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 lens focal length of the lens structure;
when the image measuring distance obtained by the image sensing chip cooperating with the lens structure is smaller than the physical measuring distance, the lens position adjusting 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 lens focal length of the lens structure.
3. The lens focusing system of claim 1,
the lens structure is provided with a left-handed external thread matched with the left-handed internal thread;
when the image measuring distance obtained by the image sensing chip cooperating with the lens structure is greater than the physical measuring distance, the lens position adjusting device rotates counterclockwise to adjust the lens structure, so that the lens structure gradually approaches to 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 lens focal length of the lens structure;
when the image measuring distance obtained by the image sensing chip matching with the lens structure is smaller than the entity measuring distance, the lens position adjusting device rotates clockwise to adjust the lens structure, so that the lens structure gradually gets away from the image sensing chip in a clockwise rotation manner until the actual distance between the optical central point of the lens structure and the image sensing chip is equal to the lens focal length of the lens structure.
4. The lens focusing system of claim 1,
wherein the chart display structure includes a chart-free bottom layer, and the first entity chart and the second entity chart are disposed on the chart-free bottom layer such that there is no chart around the first entity chart, around the second entity chart, and between the first entity chart and the second entity chart;
wherein the first entity graph has a plurality of first black regions and a plurality of first white regions, and the second entity graph has a plurality of second black regions and a plurality of second white regions;
wherein the first black region of the first entity diagram and the second black region of the second entity diagram have the same or different area sizes, and the first white region of the first entity diagram and the second white region of the second entity diagram have the same or different area sizes;
wherein the first entity reference point of the first entity graph 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 graph is a second entity center point, a second entity leftmost point, or a second entity rightmost point;
wherein the entity measured distance between the first entity reference point of the first entity graph and the second entity reference point of the second entity graph is a distance of one of the first entity center point, the first entity leftmost point, and the first entity rightmost point of the first entity graph from one of the second entity center point, the second entity leftmost point, or the second entity rightmost point of the second entity graph;
wherein the first image reference point of the first image graph 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 graph 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 graph and the second image reference point of the second image graph is a distance between one of the first image center point, the first image leftmost point, and the first image rightmost point of the first image graph and one of the second image center point, the second image leftmost point, or the second image rightmost point of the second image graph.
5. A lens focusing method is characterized by comprising the following steps:
providing a graph display structure including a first entity graph and a second entity graph separated from each other, a first entity reference point of the first entity graph being a distance of an entity measurement from a second entity reference point of the second entity graph;
obtaining graph image information by matching an image sensing chip with a lens structure to extract both the first entity graph and the second entity graph of the graph display structure, wherein the graph image information is used for providing 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 graph and a second image reference point of the second image graph are separated by an image measurement distance; and
gradually moving the lens structure toward a direction approaching or separating from the image sensing chip according to the comparison between the entity measurement distance and the image measurement distance until an actual distance from an optical center point of the lens structure to the image sensing chip is equal to a lens focal length of the lens structure;
when the image measurement distance obtained by the image sensing chip cooperating 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 lens focal length of the lens structure, the lens structure is adjusted by rotation so that the lens structure gradually moves towards a direction approaching 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;
when the image measuring distance obtained by the image sensing chip cooperating with the lens structure is smaller than the physical measuring distance, 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, so that the lens structure is adjusted by rotation to gradually move the lens structure 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.
6. The lens focusing method of claim 5,
the lens structure is provided with a right-handed external thread matched with the right-handed internal thread;
when the image measuring distance obtained by the image sensing chip matching with the lens structure is greater than the physical measuring distance, the lens structure is adjusted by clockwise rotation, so that the lens structure gradually approaches to 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 lens focal length of the lens structure;
when the image measurement distance obtained by the image sensing chip cooperating with the lens structure is smaller than the physical measurement distance, the lens structure is adjusted by rotating counterclockwise, so that the lens structure gradually departs 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 lens focal length of the lens structure.
7. The lens focusing method of claim 5,
the lens structure is provided with a left-handed external thread matched with the left-handed internal thread;
when the image measurement distance obtained by the image sensing chip cooperating with the lens structure is greater than the physical measurement distance, the lens structure is adjusted by rotating counterclockwise, so that the lens structure gradually approaches to the image sensing chip in a counterclockwise rotating manner 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;
when the image measuring distance obtained by the image sensing chip matching with the lens structure is smaller than the entity measuring distance, the lens structure is rotated clockwise to adjust the lens structure, so that the lens structure gradually departs from the image sensing chip in a clockwise rotation manner until the actual distance between the optical central point of the lens structure and the image sensing chip is equal to the lens focal length of the lens structure.
8. The lens focusing method of claim 5,
wherein the chart display structure includes a chart-free bottom layer, and the first entity chart and the second entity chart are disposed on the chart-free bottom layer such that there is no chart around the first entity chart, around the second entity chart, and between the first entity chart and the second entity chart;
wherein the first entity graph has a plurality of first black regions and a plurality of first white regions, and the second entity graph has a plurality of second black regions and a plurality of second white regions;
wherein the first black region of the first entity diagram and the second black region of the second entity diagram have the same or different area sizes, and the first white region of the first entity diagram and the second white region of the second entity diagram have the same or different area sizes;
wherein the first entity reference point of the first entity graph 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 graph is a second entity center point, a second entity leftmost point, or a second entity rightmost point;
wherein the entity measured distance between the first entity reference point of the first entity graph and the second entity reference point of the second entity graph is a distance of one of the first entity center point, the first entity leftmost point, and the first entity rightmost point of the first entity graph from one of the second entity center point, the second entity leftmost point, or the second entity rightmost point of the second entity graph;
wherein the first image reference point of the first image graph 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 graph 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 graph and the second image reference point of the second image graph is a distance between one of the first image center point, the first image leftmost point, and the first image rightmost point of the first image graph and one of the second image center point, the second image leftmost point, or the second image rightmost point of the second image graph.
9. A diagram display structure, the diagram display structure comprising a diagram-free bottom layer, a first entity diagram and a second entity diagram, the first entity diagram and the second entity diagram being arranged on the diagram-free bottom layer such that there is no diagram around the first entity diagram, around the second entity diagram and between the first entity diagram and the second entity diagram.
10. The chart display structure according to claim 9,
wherein the chart provided by the chart display structure only comprises the first entity chart and the second entity chart;
wherein the first entity graph has a plurality of first black regions and a plurality of first white regions, and the second entity graph has a plurality of second black regions and a plurality of second white regions;
wherein the first black region of the first entity diagram and the second black region of the second entity diagram have the same or different area sizes, and the first white region of the first entity diagram and the second white region of the second entity diagram have the same or different area sizes;
wherein a first entity reference point of the first entity graph is separated from a second entity reference point of the second entity graph by an entity measurement distance;
when an image sensing chip is matched with a lens structure to extract the first entity chart and the second entity chart of the chart display structure so as to obtain chart image information, the chart image information is used for providing a first image chart corresponding to the first entity chart and a second image chart corresponding to the second entity chart, and an image measurement distance is kept between a first image reference point of the first image chart and a second image reference point of the second image chart;
when the image measuring distance obtained by the image sensing chip cooperating with the lens structure is greater than the physical measuring distance, since an actual distance between an optical center point of the lens structure and the image sensing chip is greater than a lens focal length of the lens structure, the lens structure is adjusted by rotation so that the lens structure gradually moves towards a direction approaching 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;
when the image measurement distance obtained by the image sensing chip cooperating with the lens structure is smaller than the physical measurement distance, 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, so that the lens structure is adjusted by rotation, so that the lens structure gradually moves towards a direction 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.
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