Imaging module and visual inspection equipment

Abstract

The utility model relates to the technical field of imaging detection, in particular to an imaging module and visual inspection equipment. The imaging module comprises an imaging sensor chip and a lens assembly integrated on the imaging sensor chip, the lens assembly comprises at least two lens units with different focusing ranges, and photosensitive areas in one-to-one correspondence with the multiple lens units are formed on the imaging sensor chip. According to the utility model, the at least two lens units with different focusing ranges are integrated on the single imaging sensor chip to miniaturize the whole imaging module, the imaging area of the imaging sensor chip is divided into the photosensitive areas in one-to-one correspondence with the plurality of lens units, and the different lens units are controlled to be switched, so that the focusing range of the imaging sensor chip can be adjusted. The imaging module is suitable for view field change of an endoscope or a narrow space, and multi-lens, multi-view and ultra-depth-of-field image acquisition can be carried out.

Description

Technical Field

[0001] The utility model relates to the technical field of imaging detection, in particular to an imaging module and visual detection equipment. Background Art

[0002] The field of view (FOV) of a visual inspection device refers to the range or field of view that the visual inspection device can observe. In the existing mode, changing the field of view of a visual inspection device is generally solved through the following three solutions:

[0003] (1) Replace the lens of the visual inspection equipment. However, manual operation is required, and space for lens switching is required, which not only makes the visual inspection equipment larger, but also makes the operation steps cumbersome, which in turn makes it easy for the sensing film of the visual inspection equipment to get dusty during the operation of the visual inspection equipment, thus affecting the image effect; (2) It is achieved through a zoom lens with a telescopic lens. However, the space provided for the lens movement structure needs to be larger, resulting in a larger volume of the visual inspection equipment; (3) Switching through multiple visual inspection devices with different fields of view. However, a space several times larger is required to accommodate multiple visual inspection devices, and more and more powerful image signal processors (ISPs) and programs are also required to cooperate.

[0004] The above three existing solutions will increase the volume and occupied space of the visual inspection equipment, resulting in the inability of the visual inspection equipment to perform visual inspection operations in a small space. Utility Model Content

[0005] The technical problem to be solved by the embodiments of the present utility model is to provide an imaging module and a visual inspection device to solve the problem in the prior art that the visual inspection device cannot change the field of view in a small space.

[0006] The utility model discloses an imaging module, comprising an imaging sensor chip and a lens assembly integrated on the imaging sensor chip, wherein the lens assembly comprises at least two lens units with different focusing ranges, and a photosensitive area corresponding to a plurality of the lens units is formed on the imaging sensor chip.

[0007] Optionally, a lens mount is disposed on the imaging sensor chip, the lens assembly is integrated on the imaging sensor chip via the lens mount, and a focal length is formed between the lens assembly and the imaging sensor chip.

[0008] Optionally, the lens mount includes a first mounting body and a second mounting body arranged on the first mounting body, the imaging sensor chip is connected to the first mounting body, and the lens unit is connected to the second mounting body, so that the lens unit collects light in front of the lens mount and focuses the light onto the photosensitive area corresponding to the lens unit.

[0009] Optionally, a first accommodating groove is provided on the bottom surface of the first mounting body, and the imaging sensor chip is located in the first accommodating groove; a positioning channel corresponding to the plurality of lens units is provided in the second mounting body, and the bottom end of the positioning channel is connected to the first accommodating groove, and the lens unit is located in the positioning channel.

[0010] Optionally, the imaging module further comprises a fixing member arranged on the lens mount, the fixing member is provided with positioning holes corresponding one-to-one to the plurality of lens units, and the collecting end of the lens unit is placed in the positioning hole.

[0011] Optionally, a second accommodating groove connected to the plurality of positioning holes is provided on the bottom end surface of the fixing member, and the first mounting body and the second mounting body are both located in the second accommodating groove, so that the fixing member can encapsulate the lens holder and the lens unit, and the positioning holes are located on the top end surface of the fixing member.

[0012] Optionally, a transparent protective cover is provided on the top surface of the fixing member, so that external light can pass through the protective cover and be collected by the lens unit.

[0013] Optionally, a positioning groove is provided on the top surface of the fixing member, and the protective cover is embedded in the positioning groove.

[0014] Optionally, the plurality of lens units include at least two of a close focus lens, a mid focus lens and a long focus lens; and / or,

[0015] The plurality of lens units include at least one super close-focus lens; and / or,

[0016] The plurality of lens units include at least one set of binocular lenses.

[0017] The utility model also provides a visual inspection device, comprising the above-mentioned imaging module.

[0018] Compared with the prior art, the imaging module and visual inspection device provided by the embodiment of the utility model have the following beneficial effects:

[0019] By integrating at least two lens units with different focusing ranges on a single imaging sensor chip, the entire imaging module is miniaturized, and the imaging area of ​​the imaging sensor chip is divided into photosensitive areas corresponding to multiple lens units, so that each photosensitive area is equipped with a lens unit with different viewing angles and different depths of field, so that the lens unit collects light and focuses it on the photosensitive area corresponding to it, thereby realizing multi-lens, multi-viewing angle and ultra-depth of field image acquisition on a single imaging sensor chip, and making the imaging module suitable for the field of view change of endoscopes or narrow spaces. At the same time, the visual inspection equipment using the above imaging module can have imaging effects with multiple focal lengths and multiple depths of field to meet the needs of multiple fields of view and the realization of multiple functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The technical solution of the utility model will be further described in detail below with reference to the accompanying drawings and embodiments, in which:

[0021] Figure 1 A schematic diagram of an exploded structure of an imaging module provided by an embodiment of the utility model when viewed from above;

[0022] Figure 2 A schematic diagram of an exploded top view of the structure of an imaging module provided in an embodiment of the utility model;

[0023] Figure 3 This is a schematic diagram of the overall assembly of the imaging module provided in an embodiment of the utility model.

[0024] The reference numerals in the figures are:

[0025] 1. Imaging sensor chip; 2. Lens assembly; 21. Lens unit; 3. Lens mount; 31. First mounting body; 311. First receiving groove; 32. Second mounting body; 321. Positioning channel; 4. Fixing piece; 41. Positioning hole; 42. Second receiving groove; 43. Positioning groove; 5. Protective cover. DETAILED DESCRIPTION

[0026] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. Now, in conjunction with the accompanying drawings, a preferred embodiment of the present utility model is described in detail.

[0027] The present utility model provides an imaging module, such as Figure 1 and Figure 2As shown, it includes an imaging sensor chip 1, and a lens assembly 2 integrated on the imaging sensor chip 1. The lens assembly 2 includes at least two lens units 21 with different focusing ranges. Photosensitive areas corresponding to the multiple lens units 21 are formed on the imaging sensor chip 1. Through the setting of this structure, at least two lens units 21 with different focusing ranges are integrated on a single imaging sensor chip 1 to miniaturize the entire imaging module, so that each photosensitive area is correspondingly installed with a lens unit 21 with different viewing angles and different depths of field, and the image signals on different photosensitive areas are collected and processed based on a preset software program to realize multi-lens, multi-viewing angle and ultra-depth of field image acquisition on a single imaging sensor chip 1, so that the imaging module is suitable for field of view changes in endoscopes or small spaces. The imaging module of the utility model can be used for visual detection in scenes such as endoscopes or small spaces, and can also be used for consumer electronic products such as drones, notebooks, and mobile phones.

[0028] As described above, preferably, the imaging sensor chip 1 adopts a miniature ultra-small imaging chip, such as a 2-megapixel OV2740 chip. The lens unit 21 adopts an objective lens with an outer diameter less than 3 mm, and the lens unit 21 can be divided into a close-focus lens, a mid-focus lens, and a telephoto lens according to the focusing range. The imaging area on the imaging sensor chip 1 can be divided into different photosensitive areas with specific functions or specific imaging effects by using a shutter or a dividing line. When light is irradiated onto the imaging sensor chip 1, the charge of the photosensitive element on the imaging sensor chip 1 will change, and these charges are read and converted into electrical signals. After these electrical signals are amplified, sampled and processed, the final digital image can be generated.

[0029] Furthermore, a lens mount 3 is provided on the imaging sensor chip 1. The lens assembly 2 is integrated on the imaging sensor chip 1 through the lens mount 3. A focal length is formed between the lens assembly 2 and the imaging sensor chip 1. Through the arrangement of this structure, the lens mount 3 provided on the imaging sensor chip 1 is used for mounting the lens assembly 2, so that the lens mount 3 separates the imaging sensor chip 1 from the lens assembly 2, so as to ensure that there is a certain focal length between the lens unit 21 of the lens assembly 2 and the imaging sensor chip 1, so as to ensure that the light can be correctly focused on the imaging sensor chip 1, thereby generating a clear image. Among them, if the focal length is incorrect, it may cause imaging distortion, blur or inability to focus.

[0030] Further, the lens holder 3 includes a first mounting body 31 and a second mounting body 32 arranged on the first mounting body 31. The imaging sensor chip 1 is connected to the first mounting body 31, and the lens unit 21 is connected to the second mounting body 32, so that the lens unit 21 collects the light in front of the lens holder 3 and focuses the light on the photosensitive area corresponding to the lens unit 21. Through the setting of this structure, the lens holder 3 is divided into the first mounting body 31 and the second mounting body 32 which are arranged in one piece, so that the first mounting body 31 can be designed according to the size and shape of the imaging sensor chip 1, so as to facilitate the installation and positioning of the imaging sensor chip 1. And the second mounting body 32 can be designed according to the size and shape of multiple lens units 21, so as to facilitate the installation and positioning of multiple lens units 21. Thus, the lens unit 21 corresponds to the photosensitive area on the imaging sensor chip 1, so that the lens unit 21 can collect light and accurately focus it on the photosensitive area corresponding to it, so as to improve the imaging quality of the imaging module. Preferably, after the focus is adjusted, the lens unit 21 is fixed to the second mounting body 32 by dispensing glue.

[0031] Further, a first receiving groove 311 is provided on the bottom surface of the first installation body 31, and the imaging sensor chip 1 is located in the first receiving groove 311. A positioning channel 321 corresponding to a plurality of lens units 21 is provided in the second installation body 32, and the bottom end of the positioning channel 321 is connected to the first receiving groove 311. The lens unit 21 is located in the positioning channel 321. Through the setting of this structure, the imaging sensor chip 1 is accommodated by the first receiving groove 311 on the first installation body 31, and the lens unit 21 is installed and fixed by the positioning channel 321 in the second installation body 32, providing positioning and alignment for the installation of the imaging sensor chip 1 and the lens unit 21, thereby ensuring that the imaging sensor chip 1 and the lens unit 21 are installed in the correct position, reducing the risk of assembly errors, and then enabling the lens unit 21 to collect the light in front of the lens mount 3, and accurately focusing the light on the photosensitive area corresponding to the lens unit 21, ensuring that the final generated image is clear, so as to improve the efficiency of image acquisition by the imaging module of this embodiment.

[0032] Furthermore, combined with Figure 3 As shown, the imaging module also includes a fixing member 4 disposed on the lens mount 3. The fixing member 4 is provided with positioning holes 41 corresponding to the plurality of lens units 21, and the collection end of the lens unit 21 is placed in the positioning hole 41. Through the arrangement of this structure, when the lens unit 21 is mounted on the second mounting body 32, the collection end of the lens unit 21 is positioned using the positioning hole 41 of the fixing member 4, so as to further ensure the reliability of the position of the lens unit 21 and avoid the situation where the lens unit 21 is easy to shake and affects the imaging quality. Preferably, the collection end of the lens unit 21 can be placed in the positioning hole 41, or can pass through the positioning hole 41.

[0033] Furthermore, a second receiving groove 42 connected to a plurality of positioning holes 41 is provided on the bottom end surface of the fixing member 4. The first mounting body 31 and the second mounting body 32 are both located in the second receiving groove 42, so that the fixing member 4 can encapsulate the lens holder 3 and the lens unit 21. The positioning holes 41 are located on the top surface of the fixing member 4. With this structural setting, the fixing member 4 is a sleeve structure, and the fixing member 4 is used to cover the entire lens holder 3, so that after the imaging sensor chip 1 and the lens assembly 2 are installed on the lens holder 3, the fixing member 4 can encapsulate the entire imaging module, which is conducive to waterproofing.

[0034] Furthermore, a transparent protective cover 5 is provided on the top surface of the fixing member 4, so that external light can be collected by the lens unit 21 through the protective cover 5. Through the arrangement of this structure, on the one hand, the transparent protective cover 5 can be used to protect the collection end of the lens unit 21 without affecting the collection of light by the collection end of the lens unit 21; on the other hand, the protective cover 5 cooperates with the fixing member 4 to make the entire lens assembly 2 sealed, which is conducive to waterproofing. Preferably, the protective cover 5 is made of transparent glass.

[0035] Furthermore, a positioning groove 43 is provided on the top surface of the fixing member 4, and the positioning hole 41 is located on the bottom groove wall of the positioning groove 43. The protective cover 5 is embedded in the positioning groove 43. Through the arrangement of this structure, the positioning groove 43 is used to position the protective cover 5, and the protective cover 5 is embedded in the positioning groove 43 to prevent the protective cover 5 from easily falling off the fixing member 4, and to improve the sealing performance of the protective cover 5 on the lens unit 21. At the same time, the outer surface of the protective cover 5 is made flush with the end surface of the fixing member 4 away from the first mounting body 31, which can improve the neatness of the appearance of the entire imaging module and ensure that the user will not be disturbed by the protruding edge of the protective cover 5 when operating the imaging module.

[0036] Further, the plurality of lens units 21 include at least two of a close focus lens, a mid focus lens and a long focus lens; and / or,

[0037] The plurality of lens units 21 include at least one ultra-close-up lens; and / or,

[0038] The plurality of lens units 21 include at least one set of binocular lenses.

[0039] Through the configuration of this structure, by integrating lens units 21 with different focusing ranges on the imaging sensor chip 1, an imaging effect of multiple lenses, multiple viewing angles and super depth of field can be achieved.

[0040] For example:

[0041] A preferred embodiment is: the imaging sensor chip 1 adopts a 2-megapixel OV2740 chip, and is matched with three lens units 21. The outer diameter of the three lens units 21 is less than 3 mm, and the focusing ranges of the three lens units 21 are respectively near focus, middle focus, and far focus. The photosensitive area on the imaging sensor chip 1 is divided into three to correspond to the three lens units 21 respectively. This imaging module is installed in the endoscope and can switch different objective lenses for shooting according to needs, so as to realize multi-lens, multi-viewing angle, and ultra-depth of field image acquisition on a single imaging sensor chip 1.

[0042] A preferred embodiment is: the imaging sensor chip 1 uses a 2-megapixel OV2740 chip, and is matched with four lens units 21. The outer diameter of the four lens units 21 is less than 3 mm, and the focusing ranges of the four lens units 21 are respectively super close focus, close focus, medium focus, and far focus. When installed in an endoscope for use, different lenses can be switched for shooting according to needs, so as to realize multi-lens, multi-viewing angle, and ultra-depth of field image acquisition on a single imaging sensor chip 1.

[0043] Preferably, two of the four lens units 21 can also be used for binocular measurement, and the other two are respectively for mid-focus and tele-focus. When installed in the endoscope, different lenses can be switched for shooting as required to achieve multi-lens, multi-viewing angle, and ultra-depth of field image acquisition on a single imaging sensor chip 1.

[0044] A preferred implementation is: the imaging sensor chip 1 uses a 2-megapixel OV2740 chip, and is matched with six lens units 21. The outer diameter of the six lens units 21 is less than 3 mm, and the focusing ranges of four lens units 21 are respectively super close focus, close focus, medium focus, and far focus, and the other two lens units 21 can be used for binocular measurement. When installed in an endoscope for use, different objective lenses can be switched for shooting according to needs, so as to realize multi-lens, multi-viewing angle, and ultra-depth of field image acquisition on a single imaging sensor chip 1.

[0045] Among them, binocular measurement usually uses a special lens, called a stereo lens or binocular lens. A stereo lens consists of two parallel lenses that simulate binocular observation of the human eye. This lens enables the camera or measuring equipment to acquire images from different angles at the same time, thereby achieving depth perception and measurement of three-dimensional objects.

[0046] The utility model also provides a visual inspection device, comprising the above-mentioned imaging module.

[0047] In order to further optimize the above technical solution, the terminal of the visual inspection device is preset with a software control program, through which the image signals on different photosensitive areas are collected and processed, and used to control the switching of multiple lens units 21.

[0048] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present utility model rather than to limit it. For those skilled in the art, the technical solutions described in the above embodiments can be modified, or some of the technical features therein can be replaced by equivalents; and all these modifications and replacements should fall within the scope of protection of the claims attached to the present utility model.

Claims

1. An imaging module, Features: The imaging module includes an imaging sensor chip and a lens assembly integrated on the imaging sensor chip, wherein the lens assembly includes at least two lens units with different focusing ranges, and a photosensitive area corresponding to each of the lens units is formed on the imaging sensor chip.

2. The imaging module according to claim 1, Features: A lens mount is disposed on the imaging sensor chip, the lens assembly is integrated on the imaging sensor chip via the lens mount, and a focal length is formed between the lens assembly and the imaging sensor chip.

3. The imaging module according to claim 2, Features: The lens mount includes a first mounting body and a second mounting body arranged on the first mounting body. The imaging sensor chip is connected to the first mounting body, and the lens unit is connected to the second mounting body so that the lens unit collects light in front of the lens mount and focuses the light onto the photosensitive area corresponding to the lens unit.

4. The imaging module according to claim 3, Features: A first accommodating groove is provided on the bottom surface of the first mounting body, and the imaging sensor chip is located in the first accommodating groove. A positioning channel corresponding to the plurality of lens units is provided in the second mounting body, and the bottom end of the positioning channel is connected to the first accommodating groove, and the lens unit is located in the positioning channel.

5. The imaging module according to any one of claims 3 to 4, Features: The imaging module also includes a fixing member arranged on the lens mount, the fixing member is provided with positioning holes corresponding to the plurality of lens units one by one, and the collecting end of the lens unit is placed in the positioning hole.

6. The imaging module according to claim 5, Features: A second accommodating groove connected to the plurality of positioning holes is provided on the bottom surface of the fixing member, the first mounting body and the second mounting body are both located in the second accommodating groove, so that the fixing member can encapsulate the lens holder and the lens unit, and the positioning holes are located on the top surface of the fixing member.

7. The imaging module according to claim 6, Features: A transparent protective cover is arranged on the top surface of the fixing member so that external light can pass through the protective cover and be collected by the lens unit.

8. The imaging module according to claim 7, Features: A positioning groove is arranged on the top surface of the fixing piece, and the protective cover is embedded in the positioning groove.

9. The imaging module according to claim 1, Features: The plurality of lens units include at least two of a close focus lens, a mid focus lens and a long focus lens; and / or The plurality of lens units include at least one super close-focus lens; and / or The plurality of lens units include at least one set of binocular lenses.

10. A visual inspection device, Features: The visual inspection device comprises the imaging module described in any one of claims 1-9.

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