WO2022147926A1 - 一种杂散光遮蔽结构、包含其的超微距成像模块 - Google Patents

一种杂散光遮蔽结构、包含其的超微距成像模块 Download PDF

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Publication number
WO2022147926A1
WO2022147926A1 PCT/CN2021/089430 CN2021089430W WO2022147926A1 WO 2022147926 A1 WO2022147926 A1 WO 2022147926A1 CN 2021089430 W CN2021089430 W CN 2021089430W WO 2022147926 A1 WO2022147926 A1 WO 2022147926A1
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WIPO (PCT)
Prior art keywords
light
guide structure
light guide
lens
protection window
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PCT/CN2021/089430
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English (en)
French (fr)
Inventor
胡庆磊
黄凯
李宁
李梦婷
丁昶杰
Original Assignee
肯维捷斯（武汉）科技有限公司
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Publication of WO2022147926A1 publication Critical patent/WO2022147926A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0093—Means for protecting the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/24—Optical objectives specially designed for the purposes specified below for reproducing or copying at short object distances
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0016—Grooves, prisms, gratings, scattering particles or rough surfaces
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0031—Reflecting element, sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055—Reflecting element, sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects

Definitions

  • the invention belongs to the field of external optical imaging, in particular to a stray light shielding structure and a super macro imaging module including the same.
  • imaging devices are added to more and more instruments and consumer products, and their functions are becoming more and more diverse and important.
  • Various imaging modules emerge in an endless stream on the market. In the field of imaging, there is no mature modular product yet.
  • the current ordinary macro modules are mostly manual focusing modules installed with a wide-angle macro lens, which is the defect of Ni Bu's lack of lighting, and often simply arranges lighting beads around the lens to its imaging field of view.
  • the main shortcoming of this scheme is:
  • the lighting source is directly illuminated by lamp beads.
  • the uniformity of the actual lighting effect will change greatly, especially in the ultra-macro imaging environment where the object is very close, the lighting will be seriously insufficient, and This lighting mode will have strong and concentrated reflections when observing highly reflective surfaces, which will affect the image quality.
  • the lighting element needs to be powered separately, instead of directly using the flash LED light source commonly used in mobile devices at present. There is a situation where the battery needs to be charged or replaced after the battery is exhausted, which is inconvenient to use.
  • the lighting problem can be improved by changing the exit angle of the illumination light source, adding guiding components for the light, and controlling the light-emitting angle of the LED.
  • the specific light-emitting angle of the lamp bead is also required.
  • the advantage of this solution is that it solves the problem of limited supplementary light for the macro imaging module, but it has many parts, and the structure is too complicated. The difficulty is high, which is not conducive to the miniaturization and integration of modules, and the cost increases.
  • the Chinese utility model patent with the application number CN201920098694.5 discloses a solution for improving the macro imaging module through a light guide structure.
  • the advantage of this solution is that the illumination of the macro imaging module is uniform and the overall volume is controlled, but The optical lens with the symmetrical structure of the integrated autofocus module involved in this solution has not yet been finished, and the module is installed inside the device as a whole. And the manufacturing difficulty and cost are relatively high.
  • the Chinese invention patent with the application number CN201811055795.0 discloses a macro module that is externally connected to a device camera and uses a light guide structure for lighting. There is no direct use of the LED flash of the device itself, which increases the cost of the product itself, and needs to replace the battery, which is inconvenient to use.
  • the Chinese invention patent with the application number CN201811003701.5 released a macro imaging module that illuminates the object surface through a light guide structure. It is equipped with a variety of models and has a simple and easy-to-use structure. However, this invention has the same defect as the above-mentioned utility model or invention: the module lens is in direct contact with the outside world, the outermost lens is easily damaged or polluted, and the reliability is not high.
  • Chinese patents with application numbers CN201922072118.6 and CN201922072041.2 disclose a mobile terminal, at least one of the plurality of lenses is a main camera lens and at least one is a super macro lens, which can realize super macro shooting and meet the requirements of close-range super
  • this solution requires that the mobile phone terminal itself has a super macro lens, which cannot meet the super macro shooting needs of ordinary mobile phones that do not have a super macro lens.
  • the miniaturized ultra-macro imaging module and the imaging equipment using it have great application prospects and value in the fields of biomedicine, intelligent manufacturing, and consumer electronics.
  • the present invention provides a stray light shielding structure and a super macro imaging module including the same, using a shielding circle to surround a protection window with a silk screen, eliminating a large amount of lighting
  • the protective window on the back of the module adopts silk screen printing and adhesive.
  • the stray light is shielded to prevent the influence of stray light between the super macro module and the device lens on the imaging effect, and the overall imaging quality is improved.
  • a stray light shielding structure includes a super-macro lens disposed in the lens mounting through hole of the light guide structure in front of the object-side end face. front protection window;
  • the light guide structure is made of translucent or transparent solid material, which is detachably connected to a portable imaging device with a camera and an illuminator, and the lens mounting through hole is facing the camera, and the end face of the light guide structure is larger than that of the light guide structure.
  • the convex front of the front protection window is closer to the object surface, and the annular inner side of the convex front forms a light emitting surface; the light guide structure covers the illuminator, guides the illuminating light of the illuminator, and exports it from the light emitting surface to the object surface;
  • the front protection window is made of light-transmitting solid material, and the outer periphery of the image side of the front protection window and its edge sidewalls are provided with a front protection window silk screen, and the front protection window silk screen does not block the viewing angle of the lens;
  • the stray light shielding structure also includes a shading aperture, which is arranged between the edge side wall of the front protection window and the lens mounting through hole, and extends back and forth. The distance from the end face of the object to the object plane.
  • the front protective window is made of a solid material with better light transmission properties, such as glass, sapphire or transparent plastic, with a uniform thickness, and is located in front of the object-side end of the lens. And its thickness should not affect the focal plane range and imaging quality of the lens. Its size should not allow its edge to enter the field of view of the lens.
  • the protective window can be bonded to the lens or other structures by adhesive or dispensing, or it can be directly mechanically matched or embedded in other structures.
  • the shading ring can be a part of the side of the lens package, or can be used as an independent part.
  • a stepped surface may be provided to surround a partial surface of the edge region of the image-side end surface of the protection window, and the distance from the object-side end surface to the object surface of the shading aperture is less than or equal to the distance from the object-side end surface of the protection window to the object surface.
  • the stray light shielding structure further includes a back protection window, which is made of light-transmitting solid material and is disposed behind the image-side end face of the lens.
  • the front and rear protection windows enclose the lens in the light guide structure, and the back protects the edge of the window. Do not enter the field of view of the camera of the portable imaging device.
  • the back protection window is made of a solid material with good light transmission properties such as glass, sapphire or transparent plastic, and has a uniform thickness, and is located behind the image-side end face of the lens. And its thickness should not affect the focal plane range and imaging quality of the lens, and its size should not allow its edge to enter the field of view of the camera of the portable imaging device in the installed state.
  • the object-side end face of the back protection window has a back protection window screen printing, and the back protection window screen printing does not enter the field of view of the camera of the portable imaging device, and a screen printing lens through hole is formed. If the back protection window covers the illuminator of the portable imaging device in the installed state, there should be no silk screen in the front part of the illuminator.
  • the screen printing of the back protection window does not cover the illuminator of the portable imaging device, and a screen printing lighting through hole is formed.
  • the object-side end surface of the back protection window has a back glue for bonding the back protection window and the light guide structure, and the projected area of the back glue is not larger than the area of the screen printing of the back protection window.
  • the front and rear surfaces of the front protective window and/or the back protective window are provided with functional coatings, such as antireflection films (anti-reflection films), hardening films, hydrophobic and oleophobic films, and the like.
  • functional coatings such as antireflection films (anti-reflection films), hardening films, hydrophobic and oleophobic films, and the like.
  • the image-side end face of the light guide structure is provided with a first groove, facing the illuminator, and the groove bottom forms a light-gathering surface;
  • the light guide structure is provided with multiple reflection surfaces, including:
  • a spectroscopic reflection profile formed by the groove bottom of the second groove opened in front of the first groove and on the end face of the light guide structure;
  • the optical path includes that the light from the illuminator enters the light guide structure through the condensing surface, and passes through the light splitting reflection surface, the back reflection surface, the reflection surface before the exit, and finally exits from the light exit surface. to the object surface.
  • the multiple reflection profile further comprises:
  • the top and bottom of the lens mounting through hole and the bottom of the fourth groove opened on the end face of the light guide structure on the image side are formed by the two sides of the supplementary light reflection profile;
  • the light path also includes that the light from the illuminator is injected into the light guide structure through the condensing surface, and sequentially passes through the light splitting reflection surface, the opposite reflection surface, the two sides supplementary light reflection surface, and the reflection surface before exit, Finally, the light is emitted from the light emitting surface and hits the object surface.
  • the multiple reflection profile further comprises:
  • the lens mounting through hole is far away from the distal end side of the light-condensing surface, and the opposite secondary reflection surface formed by the outer wall of the light-guiding structure;
  • the light path also includes that the light from the illuminator is injected into the light guide structure through the condensing surface, and the light directed toward it is reflected by the opposite secondary reflection surface to the back symmetrical reflection surface, and finally from the back symmetrical reflection surface.
  • the light emitting surface is emitted and hits the object surface.
  • a super-macro imaging module comprising a super-macro lens, a light guide structure mounted on a housing, and the stray light shield mounted on the light guide structure. structure.
  • a multi-reflection type light guide structure is provided, the light guide structure is made of translucent or transparent solid material, which is detachably connected to a camera and
  • the portable imaging device of the illuminator is provided with a lens mounting through hole, facing the camera head, the end face of the light guide structure is closer to the object surface than the end face of the lens package, and the annular inner side of the convex front forms a light emitting surface,
  • the illumination light entering in the light guide structure finally hits the object surface through the refraction or scattering of the surface;
  • the lens installed in the lens mounting through hole is a super macro lens;
  • the lens includes a lens group and a lens package, which is located directly in front of the camera of the portable imaging device in the connected state during use;
  • the lens mounting through hole is A circular through hole, the internal structure of this through hole can have steps, the light guide structure and the lens are connected by means of gluing, etc., and the diameter of any position of the through hole in the installed state is larger than the diameter of the lens package at this position;
  • a first groove is opened on the image-side end face of the light guide structure, facing the illuminator, and the bottom of the groove forms a light-gathering surface;
  • the light guide structure is provided with multiple reflection surfaces, which are used to reflect the illumination light propagating inside the light guide structure and optimize the lighting conditions and imaging effects of the object; the details include:
  • a spectroscopic reflection profile formed by the groove bottom of the second groove opened in front of the first groove and on the end face of the light guide structure;
  • the optical path includes that the light from the illuminator enters the light guide structure through the condensing surface, and passes through the light splitting reflection surface, the back reflection surface, the reflection surface before the exit, and finally exits from the light exit surface. to the object surface.
  • the multiple reflection profile further comprises:
  • the top and bottom of the lens mounting through hole and the bottom of the fourth groove opened on the end face of the light guide structure on the image side are formed by the two sides of the supplementary light reflection profile;
  • the optical path also includes the light from the illuminator being injected into the light guide structure through the condensing surface, and passing through the light splitting reflection surface, the opposite reflection surface, the two sides supplementary light reflection surface, and the exit front reflection surface in sequence, Finally, the light is emitted from the light emitting surface and hits the object surface.
  • the multiple reflection profile further comprises:
  • the lens mounting through hole is far away from the distal end side of the light-condensing surface, and the opposite secondary reflection surface formed by the outer wall of the light-guiding structure;
  • the light path also includes that the light from the illuminator is injected into the light guide structure through the condensing surface, and the light directed toward it is reflected by the opposite secondary reflection surface to the back symmetrical reflection surface, and finally from the back symmetrical reflection surface.
  • the light emitting surface is emitted and hits the object surface.
  • the light emitting surface is a conical surface, an arc surface, or a combination of the two.
  • the light collecting surface is a curved surface, or a combination of different curved surfaces, or a combination of flat surfaces, or a combination of curved surfaces and flat surfaces.
  • each of the multi-reflection profiles is independently selected from one of a flat surface, a curved surface, and a combination of a flat surface and a curved surface.
  • part or all of the outer surface of the light guide structure is provided with a scattering layer, which can be a white coating or covering material, so as to fully reflect and scatter the light inside the light guide structure, and the scattering layer shall not cover the light guide structure. Concentrating and light-emitting surfaces.
  • the light guide structure is symmetrically arranged with respect to the longitudinal section through the lens mounting through hole and the center of the first groove.
  • the two oppositely reflecting surfaces are symmetrically arranged on both sides of the second groove.
  • the even-numbered opposing secondary reflection profiles are in a symmetrical wave shape as a whole, and the paired opposing secondary reflection profiles form outward protrusions.
  • the lens package in front of the super macro lens includes a front protective window.
  • a super macro imaging module comprising a lens and the multi-reflection type light guide structure mounted on the casing, a front protective window, and a back protective window. ;
  • the lens is installed in the lens installation through hole of the light guide structure, and the front protection window and the back protection window are arranged in sequence at the front and rear.
  • the casing is made of a solid material with a certain rigidity such as metal or plastic, or is formed by connecting a variety of structural members made of the above materials, and has a cavity inside for accommodating and connecting the light guide structure and the light guide structure.
  • the above-mentioned structures such as the lens, shading ring and protective window installed on it, and the object side end face of the housing shall not exceed the object side.
  • a connector is also included, and the connector is located on the housing, which can be a magnet, adhesive or other mechanical structures, and is used to position and fasten the ultra-macro imaging module on the portable imaging device.
  • the light-guiding structure of the multi-reflection surface of the present invention and the ultra-macro imaging module including it through the optimized design of the structure, make the imaging module small, light, high reliability and good imaging quality.
  • the multi-reflection surface light guide structure and the ultra-macro imaging module including the multi-reflection surface of the present invention form multiple light guide optical paths by constructing the multi-reflection surface, so that the illumination from the illuminator of the portable imaging device is sufficient and the uniformity is high. , while being easy to manufacture and assemble.
  • the stray light shielding structure of the present invention and the ultra-macro imaging module comprising the same use a shading aperture to surround the protective window with silk screen printing, so as to prevent the influence of imaging glare caused by a large amount of illumination light entering the protective window and entering the lens, and After the illumination light enters the protective window, the influence of the scattered light to illuminate the surface impurities on the imaging quality is eliminated.
  • the protection window on the back of the module uses silk screen printing and adhesive to shield the stray light, preventing the influence of the stray light between the ultra-macro module and the device lens on the imaging effect , the overall image quality is improved.
  • the stray light shielding structure of the present invention and the ultra-macro imaging module including the same use the back protection window to completely seal the lens with the object-side protection window from the other end, thereby avoiding external pollution and damage to the lens itself. , high reliability.
  • FIG. 1 is a schematic cross-sectional view of a state of use of the ultra-macro imaging module of the present invention in one form
  • FIG. 2 is a schematic diagram of a partial illumination light path of the light guide structure of the imaging module in the form of FIG. 1;
  • FIG. 3 is a schematic diagram of another part of the illumination light path of the light guide structure of the imaging module in the form of FIG. 1;
  • FIG. 4 is a schematic cross-sectional view of the structure of the ultra-macro imaging module of the present invention.
  • FIG. 5 is a partial cross-sectional schematic diagram of the partially enlarged stray light shielding structure of FIG. 4;
  • FIG. 6 is a schematic cross-sectional view of the use state of the ultra-macro imaging module of the present invention in another form
  • FIG. 7 is a schematic diagram of a partial illumination light path of the light guide structure in another form
  • FIG. 8 is a schematic diagram of another part of the illumination light path of the light guide structure in another form.
  • the present invention provides a super macro imaging module, which is detachably connected to a portable imaging device with a camera and an illuminator
  • the imaging device 3 is, for example, a digital product such as a smart phone or a tablet computer, It has a camera 301 and an illuminator 302, wherein the camera 301 can be a fixed-focus camera module or an AF auto-focus camera module, and the illuminator 302 can be a flash or other fill light of the device.
  • the lens 101 of the super-macro imaging module 1 includes a lens group 1011 and a lens package 1012; the lens 101 is located in front of the camera 301 of the portable imaging device 3 in the connected state of the super-macro imaging module 1 in use. , and the lens 101 is installed in the lens installation through hole 1021 on the light guide structure 102 .
  • the light guide structure 102 is made of transparent plastic, and the lens mounting through holes 1021 on the light guide structure 102 are stepped holes, all of which have a stepped surface of 10211.
  • the light guide structure 102 and the lens 101 are bonded by glue ( (not shown in the figure), after installation, the image side end face 1022 of the light guide structure is flush with the image side end face 1013 of the lens, and the distance between the light guide structure object side end face 1023 and the lens object side end face 1014 is 0.1-20mm, preferably, Its distance is 0.8-1mm.
  • a light-emitting surface 1024 is set on the circular edge where the lens mounting through hole 1021 of the light-guiding structure 102 intersects with the object-side end face 1023, and its shape is a tapered surface. As shown in Figures 2 and 4, its bus bar 10241 and the light-guiding structure The included angle of the square end faces is 20°-45°, preferably, the angle is 33°, the illuminating light 10242 refracted or scattered by this light emitting surface 1024 hits the object surface, so that the object surface forms uniform illumination
  • the light guide structure 102 is provided with a multi-reflection surface 1025, as shown in the cross-sectional view of FIG. 2 and FIG. 3.
  • the multiple reflection surface includes: a light-splitting reflection surface 10251, an opposite reflection surface 10252, opposite secondary reflective surface 10253, back reflective surface 10254, both sides fill light reflective surface 10255, exit front reflective surface 10256, back symmetrical reflective surface 10257, the internal reflected light path is shown in the figure As shown in 2-4, the above multi-reflection surface 1025 is flat in this embodiment.
  • the image-side end surface 1023 of the light guide structure 102 has a condensing surface 1026, and its condensing light 10261 is shown in FIG. 4.
  • the surface is a partial spherical surface. In this state, the center of the profile is located in the area directly in front of the illuminator 302 of the portable imaging device.
  • a first groove is opened on the image-side end face of the light guide structure, facing the illuminator, and the bottom of the groove forms a light-condensing surface 1026;
  • the light guide structure is provided with multiple reflection surfaces 1025, which are used to reflect the illumination light propagating inside the light guide structure, so as to optimize the lighting conditions and imaging effects of the object; specifically, it includes:
  • the front reflective surface 10256 formed by the front of the third groove, the outside of the light emitting surface, and the side wall of the light guide structure;
  • the optical path includes that the light from the illuminator enters the light guide structure through the condensing surface, and passes through the light splitting reflection surface, the back reflection surface, the reflection surface before the exit, and finally exits from the light exit surface. to the object surface.
  • the multiple reflection profile further comprises:
  • the oppositely reflective surface 10252 formed on the upper and lower sides of the first groove and the outer wall of the light guide structure
  • the top and bottom of the lens mounting through hole and the bottom of the fourth groove formed on the end face of the light guide structure on the image side are the two sides of the supplementary light reflection surface 10255;
  • the optical path also includes the light from the illuminator being injected into the light guide structure through the condensing surface, and passing through the light splitting reflection surface, the opposite reflection surface, the two sides supplementary light reflection surface, and the exit front reflection surface in sequence, Finally, the light is emitted from the light emitting surface and hits the object surface.
  • the multiple reflection profile further comprises:
  • the lens mounting through hole is far from the distal end side of the light-condensing surface, and the opposite secondary reflection surface 10253 formed by the outer wall of the light-guiding structure;
  • the light path also includes that the light from the illuminator is injected into the light guide structure through the condensing surface, and the light directed toward it is reflected by the opposite secondary reflection surface to the back symmetrical reflection surface, and finally from the back symmetrical reflection surface.
  • the light emitting surface is emitted and hits the object surface.
  • the light emitting surface 1024 is a conical surface, an arc surface, or a combination of the two.
  • the light collecting surface 1026 is a curved surface, or a combination of different curved surfaces, or a combination of flat surfaces, or a combination of curved surfaces and flat surfaces.
  • each profile in the multi-reflection profile 1025 is independently selected from one of a flat surface, a curved surface, and a combination of a flat surface and a curved surface.
  • part or all of the outer surface of the light guide structure is provided with a scattering layer, which can be a white coating or covering material, so as to fully reflect and scatter the light inside the light guide structure, and the scattering layer shall not cover the light guide structure. Concentrating and light-emitting surfaces.
  • the light guide structure is symmetrically arranged with respect to the longitudinal section through the lens mounting through hole and the center of the first groove.
  • the two oppositely reflective surfaces 10252 are symmetrically arranged on both sides of the second groove.
  • the even number of the opposing secondary reflection profiles 10253 are in a symmetrical wave shape as a whole, and the paired opposing secondary reflection profiles form outward protrusions.
  • the lens package in front of the super macro lens includes a protective window 103 .
  • the protective window 103 is made of glass material with a thickness of 0.3mm-0.8mm, which does not affect the focal plane range and imaging quality of the lens, and is located in front of the object end 1014 of the lens. Its appearance is circular, with a diameter of 7-15mm, and its edges do not enter the field of view of the lens.
  • the distance from the object-side end surface 1031 of the protection window to the object surface is greater than the distance from the light-guiding structure object-side end surface 1023 to the object surface, and the distance between the two parallel end surfaces is 0.1-1mm.
  • the image-side end surface 1032 of the protection window has a silk screen 1033 whose color is black.
  • the front of the lens field of view of the object-side end surface 1031 of the protection window is not blocked by the silk screen, and the edge of the silk screen does not enter the field of view of the lens 101 .
  • the image-side end surface 1032 of the protection window is pasted with a double-sided adhesive tape 1034, the color of which is black, and the overall thickness is 0.05-0.3 mm.
  • the double-sided tape 1034 has a through hole in front of the field of view of the lens 101 that is greater than or equal to the field of view of the lens, and the edge of the double-sided tape does not block the lens
  • the surface of the end surface 1031 of the protective window is provided with a hydrophobic and oleophobic film (not shown in the figure).
  • the shading ring 104 is made of metal, non-transparent plastic and other opaque solid materials.
  • the shading ring 104 is independent of the lens package, and is in the form of a stepped surface. Both ends are open-hearted cylinders, the side walls 1041 of which surround the side walls of the edge of the protective window, and the distance between the object-side end surface 1042 and the object surface in the installed state is less than or equal to the distance between the object-side end surface 1031 of the protective window and the object surface, and the step surface 1043
  • the projection coincides with the projection area of the edge portion of the end face 1032 on the image side of the protection window.
  • the back protection window 105 is made of a solid material with good light transmission properties such as glass, sapphire or transparent plastic, and has a uniform thickness.
  • its thickness is 0.3-0.8mm, and its thickness It does not affect the focal plane range and imaging quality of the lens, and its position is behind the image end face 1013 of the lens, and its size should be such that the edge of the lens cannot enter the field of view of the camera 301 of the portable imaging device in the installed state.
  • the object-side end surface 1051 of the back protection window may have a silk screen 1052, and the silk screen 1052 should not enter the field of view of the camera 301 of the portable imaging device in the installed state. That is, the screen printing in the rear area of the lens has a through hole 10521.
  • the diameter of the screen printing lens through hole 10521 is smaller than the diameter of the end face 1014 on the image side of the lens, and larger than the circle formed by the intersection of the image field angle of the lens and the end face 1051 on the object side of the back protection window.
  • the diameter of the shape, that is, the silk screen 1052 can block part of the end face 1013 on the image side of the lens, and does not affect the normal imaging of the lens 101 .
  • the back protective window 105 covers the illuminator 302 of the portable imaging device, and a part of the area in front of the illuminator 302 is screen-printed with a screen-printed lighting through hole 10522 .
  • the object-side end face 1051 of the back protection window has a back protection window adhesive 1053, which is used to connect the back protection window to the housing 106 or the light guide structure 102, and the adhesive does not cover the lens image side field of view 1015 and the angle of view 1015.
  • the circle formed by the intersection of the end faces 1051 of the back protection window object does not cover the necessary light-transmitting area above the device illuminator 302 in the installed state.
  • the adhesive and silk screen color of the back protection window and the lens protection window are black.
  • the image-side end surface 1054 of the back protection window may have a hydrophobic and oleophobic film (not shown in the figure).
  • the shading aperture 104 blocks all the stray light reflected from the side of the lens protection window 103 and the end face of the image side.
  • the protection window silk screen 1033 blocks most of the large-angle light entering from the edge of the object side end face of the lens protection window 103
  • the back protection window adhesive 1053 blocks most of the light guide structure 102
  • the image side end face and the lens mounting through hole wall are emitted of stray light that may enter the device camera.
  • the housing 106 is made of a solid material with a certain rigidity, such as metal or plastic, and has a cavity inside for accommodating and connecting the light guide structure and the lens, light shielding, etc.
  • the above-mentioned structures such as ring and protective window shall be used, and the end surface of the outer shell shall not exceed the object surface.
  • the connecting member 107 is a magnet 1071.
  • the two parts of the magnet are located in the module housing and the device respectively, and their magnetic poles are different and their positions are corresponding. It is fixed at the corresponding position of the portable imaging device 3, where the lens 1 of the ultra-macro imaging module is located in front of the camera 301 of the portable imaging device, and the light-converging surface 1026 of the light guide structure 102 is located at the illuminator 302 of the portable imaging device. the area directly in front of it.
  • the present invention provides a super macro imaging module, which is detachably connected to a portable imaging device with a camera and an illuminator, and has the following changes compared to the foregoing.
  • the light guide structure 102 is made of transparent plastic, and the lens mounting through hole 1021 on the light guide structure 102 is a stepped hole.
  • the light guide structure 102 and the lens 101 are mechanically matched through the lens mounting hole thread 10212 of the light guide structure and the lens thread 1015.
  • the distance between the image-side end surface 1022 of the light guide structure and the image-side end surface 1013 of the lens after installation is controlled by an installation fixture (not shown in the figure), and the distance dimension is 0.8-1 mm.
  • a light-emitting surface 1024 is set on the circular edge where the lens mounting through hole 1021 of the light guide structure 102 intersects with the object-side end surface 1023, and its shape is a ring-shaped curved surface. As shown in the plan view of FIG. The outgoing light 10242 refracted or scattered by the surface 1024 hits the object surface, so that the object surface forms uniform illumination
  • the light guide structure 102 is provided with a multi-reflection surface 1025, as shown in the cross-sectional view of FIG. 2 and FIG. 3.
  • the multiple reflection surface includes: a light-splitting reflection surface 10251, an opposite reflection surface 10252, opposite secondary reflective surface 10253, back reflective surface 10254, both sides supplementary light reflective surface 10255, exit front reflective surface 10256, back symmetrical reflective surface 10257, the schematic diagram of the internal reflected light path is as follows As shown in FIGS. 6-8 , the above multi-reflection surface 1025 is a curved surface in this embodiment.
  • the outer surface of the light guide structure 102 has a scattering layer, which can be a solid material sprayed or coated on the outer surface of the light guide structure, or a cavity surface on which the outer shell is attached to the light guide structure.
  • the layer is a highly reflective color such as white or silver.
  • the image-side end surface 1023 of the light guide structure 102 has a light-condensing surface 1026.
  • the surface is a pyramid surface composed of multiple inclined planes.
  • the center of the surface is Located in the area directly in front of the portable imaging device illuminator 302 .
  • the protective window 103 is made of glass material with a thickness of 0.3mm-0.8mm, which does not affect the focal plane range and imaging quality of the lens, and is located in front of the object end 1014 of the lens. Its appearance is round, with a diameter of 7-15mm, and its edges do not enter the field of view of the lens.
  • the distance from the object-side end surface 1031 of the protection window to the object surface is greater than the distance from the light-guiding structure object-side end surface to the object surface, and the distance between the two parallel end surfaces is 0.1-1 mm.
  • the surface of the end face 1031 on the protective window is provided with a hydrophobic and oleophobic film and an antireflection film (not shown in the figure).
  • the shading ring 104 is integrated with the lens package, and its shape is an annular thin wall with a stepped surface, and its material is the same as the lens package and is made of opaque plastic material.
  • the distance between the object-side end surface 1042 of the shielding aperture and the object surface is less than or equal to the distance between the object-side end surface 1031 of the protection window and the object surface for the side wall of the edge of the window.
  • the image-side end surface 1032 of the protection window is bonded to the stepped surface 1043 of the light-shielding aperture 104 by dispensing glue.
  • the back protection window 105 is made of a solid material with good light transmission properties such as glass, sapphire or transparent plastic, and has a uniform thickness. In this embodiment, its thickness is 0.3-0.8mm, and its thickness does not affect the focal plane range of the lens. and imaging quality, its position is located behind the lens image end face 1013, and its size should be such that the edge cannot enter the field of view of the camera 301 of the portable imaging device in the installed state.
  • the object-side end surface 1051 of the back protection window may have a silk screen 1052, and the silk screen should not enter the field of view of the camera of the portable imaging device in the installed state.
  • the back protection window In the installed state, the back protection window only covers the image-side end face 1013 of the lens 101 .
  • the image-side end surface 1054 of the back protection window may have a hydrophobic and oleophobic film (not shown in the figure).
  • the connector 107 is a double-sided adhesive tape 1072, which is located in the slot of the casing or the light guide structure, and is pre-fitted and pressed with the imaging module, and the other side is pasted to the protective window outside the camera of the device when in use. and the lens 1 of the super-macro imaging module is located in front of the camera 301 of the portable imaging device, and the light collecting surface 1026 of the light guide structure 102 is located in the area directly in front of the illuminator 302 of the portable imaging device.
  • the light guide structure of the multi-reflection surface of the present invention and the ultra-macro imaging module including the same through the optimized design of the structure, make the imaging module small, light, high reliability and good imaging quality.
  • the multi-reflection surface light guide structure and the ultra-macro imaging module including the multi-reflection surface of the present invention form multiple light guide optical paths by constructing the multi-reflection surface, so that the illumination from the illuminator of the portable imaging device is sufficient and the uniformity is high. , while being easy to manufacture and assemble.

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Abstract

一种杂散光遮蔽机构，包括设置在导光结构（102）的镜头安装孔（1021）中的超微距镜头（101）的物方端面（1023）前方的带有丝印（1033）的前保护视窗（103），设置在前保护视窗（103）的边缘侧壁与镜头安装孔（1021）之间、呈前后延伸状的遮光圈（104）。采用遮光圈（104）包围带丝印（1033）的前保护视窗（103），杜绝了大量照明光进入前保护视窗（103）后打入镜头造成的炫光影响，且杜绝了照明光进入前保护视窗（103）后其散射光照亮表面杂质对成像质量造成的影响，进一步地，背部保护视窗（105）采用丝印（1052）和背胶（1053）对杂散光进行遮蔽，杜绝了超微距成像模块（1）与设备镜头间杂散光对成像效果的影响。

Description

一种杂散光遮蔽结构、包含其的超微距成像模块 【技术领域】
本发明属于外置光学成像领域，具体涉及一种杂散光遮蔽结构、包含其的超微距成像模块。
【背景技术】
随着光学成像技术的发展，越来越多的仪器设备以及消费产品上增添了成像装置，其功能的多样性和重要性也越来越高，市面上各类成像模块层出不穷，但在超微距成像领域，目前尚无成熟的模块化产品出现。
关于成像模块方面，目前的普通微距模组多为安装有广角微距镜头的手动调焦模组，其为倪补照明不足的缺陷，往往在镜头周围简单布置照明灯珠对其成像视野内进行照明，如申请号为CN200720057106.0的中国实用新型专利公开文件，以及申请号为CN201320093315.6的中国实用新型专利公开文件，该方案的主要缺点是：
1)由于其自身广角微距镜头的限制，导致模块无法通过移动设备本身的镜头自动调焦实现对焦，实际使用中手动对焦操作不便，难以直接拍摄清晰的图像。
2)照明光源为灯珠直接照射，在物方移动过程中，实际照明效果均匀程度会发生很大的变化，特别是在物面极近的超微距成像环境下，照明会严重不足，且此种照明模式观察高反表面时会有较强且较为集中的反射，影响成像质量。
3)照明元件需要单独供电，而非直接使用目前移动设备上常见的闪光灯LED光源，存在电池电量耗尽后需要充电或更换同款电池的情况，使用较为不便。
改变照明光源出射角度，为光线添加导向部件，和控制LED发光角度等方法都可以使得照明问题得到改善，例如申请号为CN201720470643.1的中国实用新型专利公开了一种通过类似光纤的结构对微距成像模块光照进行改善的案例，其灯珠的具体发光角度也作出了要求，该方案的优点是解决了微距成像模块补光受限的问题，但其部件较多，结构过于复杂，安装难度较高，不利于模块的小型化和集成化，且成本上升。
申请号为CN201920098694.5的中国实用新型专利公布了一种通过导光结构对微距成像模块进行改善的方案，此方案的优点在于使得微距成像模组的照明均匀且控制了整体体积，但是此方案中所涉及的自动对焦模组一体的对称结构的光学镜头目前尚无成品，且模组整体设置于设备内部，需考虑到整机体积的占用及机身内部的杂散光遮蔽，其设计和制造难度和成本较高，申请号为CN201811055795.0的中国发明专利公布了一种外接于设备摄像头并利用导光结构照明的微距模块，此方案中照明光源为内置电路及发光二极管，并没有直接利用 设备本身的LED闪光灯，使得产品本身成本增加，且需要更换电池，使用较为不便。
申请号为CN201811003701.5的中国发明专利发布了一种通过导光结构对物面进行照明的微距成像模块，其镜头外接与设备摄像头进行成像，所用光源为设备自身的闪光灯光源，做到了适配多种机型且结构简单易用，但此发明同上述实用新型或发明共有的缺陷是——模组镜头都直接与外界接触，最外部镜片易受损伤或污染，可靠性不高。
申请号为CN201922072118.6和CN201922072041.2的中国专利公布了一种移动终端，多个镜头中的至少一个为主摄镜头以及至少一个为超微距镜头，能够实现超微距拍摄，满足近景超微距拍摄的需求；但是该方案需要手机终端本身具有超微距镜头，无法满足本身没有超微距镜头的普通手机的超微距拍摄需求。
小型化的超微距成像模块及应用其的成像设备在生物医疗，智能制造，以及消费电子等领域都存在极大的应用前景和价值，目前正缺乏能全面解决上述问题的产品。
【发明内容】
针对现有技术以上缺陷或改进需求中的至少一种，本发明提供了一种杂散光遮蔽结构及包含其的超微距成像模块，采用了遮光圈包围带丝印的保护视窗，杜绝了大量照明光进入保护视窗后打入镜头造成的成像炫光影响，且杜绝了照明光进入保护视窗后其散射光照亮表面杂质对成像质量造成的影响，进一步地，模块背部保护视窗采用丝印和背胶对杂散光进行遮蔽，杜绝了超微距模块与设备镜头间杂散光对成像效果的影响，总体成像质量提升。
为实现上述目的，按照本发明的一个方面，提供了一种杂散光遮蔽结构，所述杂散光遮蔽结构包括设置在导光结构的镜头安装通孔中的超微距镜头的物方端面前方的前保护视窗；
所述导光结构为半透明或透明的固体材料制成，其可拆卸地连接到具有摄像头和照明器的便携成像设备，其镜头安装通孔正对于所述摄像头，导光结构物方端面比前保护视窗凸前更靠近物面，凸前的环形内侧形成出光型面；导光结构覆盖照明器、导入照明器的照射光，并从出光型面导出至物面；
所述前保护视窗由透光固体材料制成，前保护视窗像方端面外周及其边缘侧壁具有前保护视窗丝印，且前保护视窗丝印不遮挡镜头的视角；
所述杂散光遮蔽结构还包括遮光圈，设置在前保护视窗的边缘侧壁与镜头安装通孔之间，呈前后延伸状，且遮光圈物方端面到物面的距离小于或等于前保护视窗物方端面到物面的距离。
优选地，前保护视窗由玻璃，蓝宝石或透明塑料等透光性能较好的固体材料制成，厚度均匀，其位于镜头物方端面前。且其厚度应不影响镜头的焦面范围和成像质量。其尺寸大小应不得使其边缘进入镜头视野，保护视窗可使用背胶或点胶粘接于镜头或其他结构上，也可 直接机械配合或埋入于其他结构。
优选地，所述遮光圈可为所述镜头封装物方侧的一部分，也可作为一个独立部件，其材料为金属，非透明塑料等不透光固体，其结构包围保护视窗边缘侧壁，也可具有台阶面以包围保护视窗像方端面的边缘区域部分表面，所述遮光圈的物方端面到物面的距离小于等于保护视窗物方端面到物面的距离。
优选地，所述杂散光遮蔽结构还包括背部保护视窗，由透光固体材料制成，设置在镜头像方端面后方，前后保护视窗将镜头封闭在所述导光结构中，背部保护视窗的边缘不进入便携成像设备的摄像头的视野范围内。具体地，所述背部保护视窗由玻璃，蓝宝石或透明塑料等透光性能较好的固体材料制成，厚度均匀，其位于镜头像方端面后方。且其厚度应不影响镜头的焦面范围和成像质量，其尺寸大小应在安装状态下不得使其边缘进入便携成像设备的摄像头视野范围内。
优选地，所述背部保护视窗的物方端面具有背部保护视窗丝印，且背部保护视窗丝印不进入便携成像设备的摄像头的视野范围内，形成有丝印镜头通孔。若在安装状态下背部保护视窗若覆盖住便携成像设备的照明器，则照明器前方部分区域应不得有丝印。
优选地，所述背部保护视窗丝印不覆盖便携成像设备的照明器，形成有丝印照明通孔。
优选地，所述背部保护视窗的物方端面具有背胶，用于粘接背部保护视窗与导光结构，且背胶投影面积不大于背部保护视窗丝印的面积。
优选地，所述前保护视窗和/或背部保护视窗的前后端面具有功能性镀膜，如增透膜(减反膜)，增硬膜，疏水疏油膜等。
优选地，导光结构像方端面开有第一凹槽、正对于所述照明器，槽底形成聚光型面；
导光结构内设置有多重反射型面，包括：
所述第一凹槽前方、导光结构物方端面开设的第二凹槽的槽底形成的分光反射型面；
所述第一凹槽侧方、导光结构像方端面开设的第三凹槽的槽底形成的背向反射型面；
所述第三凹槽前方、所述出光型面外侧、导光结构物方壁面形成的出射前反射型面；
光路包括来自照明器的光经聚光型面射入导光结构内，并依次经所述分光反射型面、背向反射型面、出射前反射型面，最后从所述出光型面出射打向物面。
优选地，所述多重反射型面还包括：
所述第一凹槽上下、导光结构外壁形成的对向反射形面；
所述镜头安装通孔上下、导光结构像方端面开设的第四凹槽的槽底形成的两侧补光反射型面；
光路还包括来自照明器的光经聚光型面射入导光结构内，并依次经所述分光反射型面、 对向反射形面、两侧补光反射型面、出射前反射型面，最后从所述出光型面出射打向物面。
优选地，所述多重反射型面还包括：
所述镜头安装通孔远离所述聚光型面的远端侧、导光结构外壁形成的对向二次反射型面；
导光结构像方端面开设的第五凹槽的槽底形成的背向对称反射型面，所述第五凹槽与所述第三凹槽相对所述镜头安装通孔对称设置；
光路还包括来自照明器的光经聚光型面射入导光结构内，并由所述对向二次反射型面将射向其的光反射至所述背向对称反射型面，最后从所述出光型面出射打向物面。
为实现上述目的，按照本发明的一个方面，提供了一种超微距成像模块，包括超微距镜头及安装于外壳的导光结构、安装于所述导光结构的所述的杂散光遮蔽结构。
为实现上述目的，按照本发明的一个方面，提供了一种多反射型面的导光结构，所述导光结构为半透明或透明的固体材料制成，其可拆卸地连接到具有摄像头和照明器的便携成像设备，其设置有镜头安装通孔、正对于所述摄像头，导光结构物方端面比镜头封装物方端面凸前更靠近物面，凸前的环形内侧形成出光型面，导光结构中进入的照明光线最终通过此型面的折射或散射打向物面；
所述镜头安装通孔中安装的镜头为超微距镜头；所述镜头包括透镜组，镜头封装，其在使用时的连接状态下位于所述便携成像设备的摄像头正前方；镜头安装通孔为圆形通孔，此通孔内部结构可具有台阶，导光结构与镜头通过胶粘等方式连接，且在安装状态下通孔任意位置的直径大于镜头封装此位置的直径；
导光结构像方端面开有第一凹槽、正对于所述照明器，槽底形成聚光型面；
导光结构内设置有多重反射型面，用于对导光结构内部传播的照明光线进行反射，优化物方的照明情况和成像效果；具体包括：
所述第一凹槽前方、导光结构物方端面开设的第二凹槽的槽底形成的分光反射型面；
所述第一凹槽侧方、导光结构像方端面开设的第三凹槽的槽底形成的背向反射型面；
所述第三凹槽前方、所述出光型面外侧、导光结构物方壁面形成的出射前反射型面；
光路包括来自照明器的光经聚光型面射入导光结构内，并依次经所述分光反射型面、背向反射型面、出射前反射型面，最后从所述出光型面出射打向物面。
优选地，所述多重反射型面还包括：
所述第一凹槽上下、导光结构外壁形成的对向反射形面；
所述镜头安装通孔上下、导光结构像方端面开设的第四凹槽的槽底形成的两侧补光反射型面；
光路还包括来自照明器的光经聚光型面射入导光结构内，并依次经所述分光反射型面、对向反射形面、两侧补光反射型面、出射前反射型面，最后从所述出光型面出射打向物面。
优选地，所述多重反射型面还包括：
所述镜头安装通孔远离所述聚光型面的远端侧、导光结构外壁形成的对向二次反射型面；
导光结构像方端面开设的第五凹槽的槽底形成的背向对称反射型面，所述第五凹槽与所述第三凹槽相对所述镜头安装通孔对称设置；
光路还包括来自照明器的光经聚光型面射入导光结构内，并由所述对向二次反射型面将射向其的光反射至所述背向对称反射型面，最后从所述出光型面出射打向物面。
优选地，所述出光型面为锥面，或弧面，或两者的结合。
优选地，所述聚光型面为曲面，或不同曲面的组合，或平面的组合，或曲面与平面的组合。
优选地，所述多重反射型面中各型面分别独立选自平面、曲面、平面与曲面的组合中的一种。
优选地，所述导光结构外表面局部或全部设有散射层，可为白色的涂层或覆盖材料，用于使其内部光线充分的反射和散射，所述散射层不得覆盖导光结构的聚光型面和出光型面。
优选地，所述导光结构相对于过镜头安装通孔与第一凹槽的中心的纵剖面对称设置。
优选地，两个所述对向反射形面对称设于所述第二凹槽两侧。
优选地，偶数个所述对向二次反射型面整体呈对称的波浪形，成对的所述对向二次反射型面组成向外的凸起。
优选地，所述超微距镜头前方的镜头封装包括前保护视窗。
为实现上述目的，按照本发明的另一个方面，还提供了一种超微距成像模块，包括镜头及安装于外壳的所述的多反射型面的导光结构、前保护视窗、背部保护视窗；
所述镜头安装在所述导光结构的镜头安装通孔中，前后依次设有所述前保护视窗和背部保护视窗。
优选地，所述外壳由金属或塑料等具有一定刚性的固体材料制成，或者由多种上述材料制成的结构件连接而成，其内部具有空腔，用于容纳和连接导光结构及安装于其的镜头、遮光圈和保护视窗等上述结构，且外壳的物方端面不得超越物面。
优选地，还包括连接器，所述连接器位于所述外壳上，可为磁铁，背胶或其他机械结构，用于将超微距成像模块定位和紧固在便携成像设备上。
本发明的多反射型面的导光结构与包含其的超微距成像模块，通过结构的优化设计，使 得成像模块小巧、轻便，可靠性高，成像质量好。
本发明的多反射型面的导光结构与包含其的超微距成像模块，通过构造多反射型面，形成多路导光光路，使得来自便携式成像设备照明器的照明充足，且均匀性高，同时易于制造和装配。
上述技术特征只要彼此之间未构成冲突就可以相互组合。
总体而言，通过本发明所构思的以上技术方案与现有技术相比，具有以下有益效果：
1、本发明的杂散光遮蔽结构及包含其的超微距成像模块，采用了遮光圈包围带丝印的保护视窗，杜绝了大量照明光进入保护视窗后打入镜头造成的成像炫光影响，且杜绝了照明光进入保护视窗后其散射光照亮表面杂质对成像质量造成的影响。
2、本发明的杂散光遮蔽结构及包含其的超微距成像模块，模块背部保护视窗采用丝印和背胶对杂散光进行遮蔽，杜绝了超微距模块与设备镜头间杂散光对成像效果的影响，总体成像质量提升。
3、本发明的杂散光遮蔽结构及包含其的超微距成像模块，采用的背部保护视窗将带有物方保护视窗的镜头从另一端完全封闭，避免了外界对镜头镜片本身的污染及损伤，可靠性高。
【附图说明】
图1为本发明的超微距成像模块的一种形态下使用状态的剖面示意图；
图2为图1形态下此成像模块导光结构的部分照明光路示意图；
图3为图1形态下此成像模块导光结构的另一部分照明光路示意图；
图4为本发明的超微距成像模块的结构剖面示意图；
图5为图4局部放大的杂散光遮蔽结构局部剖面示意图；
图6为本发明的超微距成像模块的另一种形态下使用状态的剖面示意图；
图7为另一种形态下导光结构的部分照明光路示意图；
图8为另一种形态下导光结构的另一部分照明光路示意图。
【具体实施方式】
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。此外，下面所描述的本发明各个实施方式中所涉及到的技术特征只要彼此之间未构成冲突就可以相互组合。下面结合具体实施方式对本发明进一步详细说明。
如图1-5所示，本发明提供一种超微距成像模块，其可拆卸地连接到具有摄像头和照明器的便携成像设备，该成像设备3例如是智能手机或平板电脑等数码产品，其具有摄像头301 和照明器302，其中摄像头301可为定焦摄像头模组或AF自动对焦摄像头模组，其中照明器302可为设备的闪光灯或其他补光灯。
所述超微距成像模块1的镜头101包括透镜组1011，镜头封装1012；所述超微距成像模块1在使用时的连接状态下镜头101位于所述便携成像设备3的摄像头301的正前方，且镜头101安装于导光结构102上的镜头安装通孔1021中。
所述导光结构102由透明塑料制成，同时导光结构102上的镜头安装通孔1021为台阶孔，其均有通孔台阶面为10211，导光结构102与镜头101通过胶水粘接(图中未示出)，安装后导光结构像方端面1022和镜头的像方端面1013平齐，导光结构物方端面1023高于镜头物方端面1014的距离为0.1-20mm，优选的，其距离为0.8-1mm。
所述导光结构102镜头安装通孔1021与其物方端面1023相交的圆形边缘上设置出光型面1024，其形态为锥面，如图2、4所示，其母线10241和导光结构物方端面的夹角为20°-45°，优选的，其角度为33°，照明光线通过此出光型面1024折射或散射发出的出射光10242打向物面，使物面形成均匀照明
所述导光结构102上设置有多重反射型面1025，如图2的剖面图和图3所示，此实施例中，此多重反射型面包含：分光反射型面10251，对向反射型面10252，对向二次反射型面10253，背向反射型面10254，两侧补光反射型面10255，出射前反射型面10256，背向对称反射型面10257，其内部的反射光线光路如图2-4所示，以上多重反射型面1025在此实施例中为平面。
优选地，所述导光结构102的像方端面1023具有聚光型面1026，其聚光光线10261如图4所示，此实施例中，表面为部分球面，在如图1所示的安装状态下此型面中心位于便携成像设备照明器302的正前方区域。
下面具体详述。
导光结构像方端面开有第一凹槽、正对于所述照明器，槽底形成聚光型面1026；
导光结构内设置有多重反射型面1025，用于对导光结构内部传播的照明光线进行反射，优化物方的照明情况和成像效果；具体包括：
所述第一凹槽前方、导光结构物方端面开设的第二凹槽的槽底形成的分光反射型面10251；
所述第一凹槽侧方、导光结构像方端面开设的第三凹槽的槽底形成的背向反射型面10254；
所述第三凹槽前方、所述出光型面外侧、导光结构物方壁面形成的出射前反射型面10256；
光路包括来自照明器的光经聚光型面射入导光结构内，并依次经所述分光反射型面、背向反射型面、出射前反射型面，最后从所述出光型面出射打向物面。
优选地，所述多重反射型面还包括：
所述第一凹槽上下、导光结构外壁形成的对向反射形面10252；
所述镜头安装通孔上下、导光结构像方端面开设的第四凹槽的槽底形成的两侧补光反射型面10255；
光路还包括来自照明器的光经聚光型面射入导光结构内，并依次经所述分光反射型面、对向反射形面、两侧补光反射型面、出射前反射型面，最后从所述出光型面出射打向物面。
优选地，所述多重反射型面还包括：
所述镜头安装通孔远离所述聚光型面的远端侧、导光结构外壁形成的对向二次反射型面10253；
导光结构像方端面开设的第五凹槽的槽底形成的背向对称反射型面，所述第五凹槽与所述第三凹槽相对所述镜头安装通孔对称设置；
光路还包括来自照明器的光经聚光型面射入导光结构内，并由所述对向二次反射型面将射向其的光反射至所述背向对称反射型面，最后从所述出光型面出射打向物面。
优选地，所述出光型面1024为锥面，或弧面，或两者的结合。
优选地，所述聚光型面1026为曲面，或不同曲面的组合，或平面的组合，或曲面与平面的组合。
优选地，所述多重反射型面1025中各型面分别独立选自平面、曲面、平面与曲面的组合中的一种。
优选地，所述导光结构外表面局部或全部设有散射层，可为白色的涂层或覆盖材料，用于使其内部光线充分的反射和散射，所述散射层不得覆盖导光结构的聚光型面和出光型面。
优选地，所述导光结构相对于过镜头安装通孔与第一凹槽的中心的纵剖面对称设置。
优选地，两个所述对向反射形面10252对称设于所述第二凹槽两侧。
优选地，偶数个所述对向二次反射型面10253整体呈对称的波浪形，成对的所述对向二次反射型面组成向外的凸起。
优选地，所述超微距镜头前方的镜头封装包括保护视窗103。
如图5中，所述保护视窗103由玻璃材料制成，厚度0.3mm-0.8mm，不影响镜头的焦面范围和成像质量，其位置位于镜头物方端1014面前。其外观为圆形，直径7-15mm，其边缘不进入镜头视野。
保护视窗物方端面1031到物面的距离大于导光结构物方端面1023到物面的距离，两平 行端面距离为0.1-1mm。所述保护视窗像方端面1032具有丝印1033，其颜色为黑色，保护视窗物方端面1031的镜头视野范围正前方无丝印遮挡，丝印边缘不进入镜头101视野。
此实施例中，保护视窗像方端面1032粘贴有双面胶1034，其颜色为黑色，整体厚度0.05-0.3mm。所述双面胶1034在镜头101视野范围前方开设大于等于镜头视野范围的通孔，其边缘不遮挡镜头
此实施例中，保护视窗物方端面1031表面具有疏水疏油膜(图中未示出)。
如图4-5中，所述遮光圈104由金属，非透明塑料等不透光的固体材料制成，此实施例中，所述遮光圈104独立于镜头封装，形态为一具有台阶面的两端通心圆筒，其侧壁1041包围保护视窗边缘侧壁，其安装状态下的物方端面1042距离物面的距离小于等于保护视窗物方端面1031距离物面的距离，其台阶面1043的投影与保护视窗像方端面1032的边缘部分投影区域重合。
如图4-5中，所述背部保护视窗105由玻璃，蓝宝石或透明塑料等透光性能较好的固体材料制成，厚度均匀，此实施例中其厚度为0.3-0.8mm，且其厚度不影响镜头的焦面范围和成像质量，其位置位于镜头像方端面1013后方，其尺寸大小应满足在安装状态下不得使其边缘进入便携成像设备的摄像头301的视野范围内。
此实施例中，背部保护视窗的物方端面1051可具有丝印1052，且丝印1052应在安装状态下不进入便携成像设备摄像头301的视野范围。即镜头后方区域丝印具有通孔10521，此实施例中，丝印镜头通孔10521的直径小于镜头像方端面1014的直径，大于镜头像方视场角与背部保护视窗物方端面1051相交所形成圆形的直径，即丝印1052可遮挡部分镜头像方端面1013，且不影响镜头101的正常成像。
此实施例中，安装状态下背部保护视窗105覆盖住便携成像设备的照明器302，其照明器302前方部分区域丝印开设有丝印照明通孔10522。
此实施例中，背部保护视窗的物方端面1051具有背部保护视窗背胶1053，用于将背部保护视窗连接于外壳106或导光结构102上，背胶不覆盖镜头像方视场角1015与背部保护视窗物方端面1051相交所形成的圆形，其投影也不覆盖安装状态下设备照明器302以上的必要透光区域。
优选的，背部保护视窗及镜头保护视窗的背胶及丝印颜色为黑色。
此实施例中，背部保护视窗像方端面1054可具有疏水疏油膜(图中未示出)。
如图5所示(图中光路为没有遮蔽状态下的原始光路，以凸显遮蔽效果)，此实施例中，遮光圈104遮挡了所有从镜头保护视窗103侧面和像方端面反射进入的杂散光，保护视窗丝印1033遮挡了大部分从镜头保护视窗103物方端面边缘打入的大角度光线，背部保护视窗 背胶1053遮挡住大部分导光结构102像方端面及镜头安装通孔孔壁射出的可能会进入设备摄像头的杂散光。
如图1所示，此实施例中，所述外壳106由金属或塑料等具有一定刚性的固体材料制成，其内部具有空腔用于容纳和连接导光结构及安装于其的镜头、遮光圈和保护视窗等上述结构，且外壳物方端面不得超越物面。
此实施例中所述连接件107为磁铁1071，两部分磁铁分别位于模块外壳及设备内，其磁极相异且位置相对应，两者贴近后的磁力将超微距成像模块横向定位和纵向紧固在便携成像设备3的对应位置上，此位置下超微距成像模块的镜头1位于便携成像设备摄像头301的正前方，且导光结构102的聚光型面1026位于便携成像设备照明器302的正前方区域。
作为另一种形态，如图6-8所示，本发明提供一种超微距成像模块，其可拆卸地连接到具有摄像头和照明器的便携成像设备，与前述相比，具有以下变化。
所述导光结构102由透明塑料制成，同时导光结构102上的镜头安装通孔1021为台阶孔，导光结构102与镜头101通过导光结构镜头安装孔螺纹10212和镜头螺纹1015机械配合，安装后导光结构像方端面1022和镜头的像方端面1013的距离由安装治具控制(图中未示出)，其距离尺寸为0.8-1mm。
所述导光结构102镜头安装通孔1021与其物方端面1023相交的圆形边缘上设置出光型面1024，其形态为环状曲面，如图2的刨面图所示照明光线通过此出光型面1024折射或散射发出的出射光10242打向物面，使物面形成均匀照明
所述导光结构102上设置有多重反射型面1025，如图2的剖面图和图3所示，此实施例中，此多重反射型面包含：分光反射型面10251，对向反射型面10252，对向二次反射型面10253，背向反射型面10254，两侧补光反射型面10255，出射前反射型面10256，背向对称反射型面10257，其内部的反射光线光路示意图如图6-8所示，以上多重反射型面1025在此实施例中为曲面。
此实施例中，导光结构102的外表面具有散射层，其可为导光结构外表面的喷油或包覆的固体材料或是外壳与导光结构相贴合的空腔表面，此散射层为白色或银色等高反射率颜色。
优选地，所述导光结构102的像方端面1023具有聚光型面1026，此实施例中，表面为多重斜平面组成的棱锥面，在如图6所示的安装状态下此型面中心位于便携成像设备照明器302的正前方区域。
此实施例中所述保护视窗103由玻璃材料制成，厚度0.3mm-0.8mm，不影响镜头的焦面范围和成像质量，其位置位于镜头物方端1014面前。其外观为圆形，直径7-15mm，其边缘 不进入镜头视野。保护视窗物方端面1031到物面的距离大于导光结构物方端面到物面的距离，两平行端面距离为0.1-1mm。此实施例中，保护视窗物方端面1031表面具有疏水疏油膜和增透膜(图中未示出)。
此实施例中，所述遮光圈104与镜头封装为一体，其形态为一具有台阶面的环形薄壁，其材质与镜头封装相同为不透光的塑料材质，其遮光圈侧壁1041包围保护视窗边缘侧壁，其遮光圈物方端面1042距离物面的距离小于等于保护视窗物方端面1031距离物面的距离。所述保护视窗像方端面1032通过点胶粘接于遮光圈104的台阶面1043上。
所述背部保护视窗105由玻璃，蓝宝石或透明塑料等透光性能较好的固体材料制成，厚度均匀，此实施例中其厚度为0.3-0.8mm，且其厚度不影响镜头的焦面范围和成像质量，其位置位于镜头像方端面1013后方，其尺寸大小应满足在安装状态下不得使其边缘进入便携成像设备的摄像头301的视野范围内。
优选地，背部保护视窗的物方端面1051可具有丝印1052，且丝印应在安装状态下不进入便携成像设备摄像头的视野范围。若在安装状态下背部保护视窗只覆盖住镜头101的像方端面1013。
此实施例中，背部保护视窗像方端面1054可具有疏水疏油膜(图中未示出)。
此实施例中所述连接器107为双面胶1072，其位于外壳或导光结构所开槽位中，与成像模块预先贴合并压紧，使用时将另一面粘贴于设备摄像头外的保护视窗上，且对准情况下的超微距成像模块的镜头1位于便携成像设备摄像头301的正前方，且导光结构102的聚光型面1026位于便携成像设备照明器302的正前方区域。
综上所述，与现有技术相比，本发明的方案具有如下显著优势：
本发明的多反射型面的导光结构与包含其的超微距成像模块，通过结构的优化设计，使得成像模块小巧、轻便，可靠性高，成像质量好。
本发明的多反射型面的导光结构与包含其的超微距成像模块，通过构造多反射型面，形成多路导光光路，使得来自便携式成像设备照明器的照明充足，且均匀性高，同时易于制造和装配。
可以理解的是，以上所描述的系统的实施例仅仅是示意性的，其中作为分离部件说明的单元可以是或者也可以不是物理上分开的，既可以位于一个地方，或者也可以分布到不同网络单元上。可以根据实际需要选择其中的部分或全部模块来实现本实施例方案的目的。本领域普通技术人员在不付出创造性的劳动的情况下，即可以理解并实施。
另外，本领域内的技术人员应当理解的是，在本发明实施例的申请文件中，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、 方法、物品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。
本发明实施例的说明书中，说明了大量具体细节。然而应当理解的是，本发明实施例的实施例可以在没有这些具体细节的情况下实践。在一些实例中，并未详细示出公知的方法、结构和技术，以便不模糊对本说明书的理解。类似地，应当理解，为了精简本发明实施例公开并帮助理解各个发明方面中的一个或多个，在上面对本发明实施例的示例性实施例的描述中，本发明实施例的各个特征有时被一起分组到单个实施例、图、或者对其的描述中。
然而，并不应将该公开的方法解释成反映如下意图：即所要求保护的本发明实施例要求比在每个权利要求中所明确记载的特征更多的特征。更确切地说，如权利要求书所反映的那样，发明方面在于少于前面公开的单个实施例的所有特征。因此，遵循具体实施方式的权利要求书由此明确地并入该具体实施方式，其中每个权利要求本身都作为本发明实施例的单独实施例。
最后应说明的是：以上实施例仅用以说明本发明实施例的技术方案，而非对其限制；尽管参照前述实施例对本发明实施例进行了详细的说明，本领域的技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明实施例各实施例技术方案的精神和范围。

Claims (10)

  1. 一种杂散光遮蔽结构，其特征在于：所述杂散光遮蔽结构包括设置在导光结构的镜头安装通孔中的超微距镜头的物方端面前方的前保护视窗；
    所述导光结构为半透明或透明的固体材料制成，其可拆卸地连接到具有摄像头和照明器的便携成像设备，其镜头安装通孔正对于所述摄像头，导光结构物方端面比前保护视窗凸前更靠近物面，凸前的环形内侧形成出光型面；导光结构覆盖照明器、导入照明器的照射光，并从出光型面导出至物面；
    所述前保护视窗由透光固体材料制成，前保护视窗像方端面外周及其边缘侧壁具有前保护视窗丝印，且前保护视窗丝印不遮挡镜头的视角；
    所述杂散光遮蔽结构还包括遮光圈，设置在前保护视窗的边缘侧壁与镜头安装通孔之间，呈前后延伸状，且遮光圈物方端面到物面的距离小于或等于前保护视窗物方端面到物面的距离。
  2. 如权利要求1所述的杂散光遮蔽结构，其特征在于：
    所述杂散光遮蔽结构还包括背部保护视窗，由透光固体材料制成，设置在镜头像方端面后方，前后保护视窗将镜头封闭在所述导光结构中，背部保护视窗的边缘不进入便携成像设备的摄像头的视野范围内。
  3. 如权利要求2所述的杂散光遮蔽结构，其特征在于：
    所述背部保护视窗的物方端面具有背部保护视窗丝印，且背部保护视窗丝印不进入便携成像设备的摄像头的视野范围内，形成有丝印镜头通孔。
  4. 如权利要求3所述的杂散光遮蔽结构，其特征在于：
    所述背部保护视窗丝印不覆盖便携成像设备的照明器，形成有丝印照明通孔。
  5. 如权利要求3所述的杂散光遮蔽结构，其特征在于：
    所述背部保护视窗的物方端面具有背胶，用于粘接背部保护视窗与导光结构，且背胶投影面积不大于背部保护视窗丝印的面积。
  6. 如权利要求2所述的杂散光遮蔽结构，其特征在于：
    所述前保护视窗和/或背部保护视窗的前后端面具有功能性镀膜。
  7. 如权利要求1所述的杂散光遮蔽结构，其特征在于：
    导光结构像方端面开有第一凹槽、正对于所述照明器，槽底形成聚光型面；
    导光结构内设置有多重反射型面，包括：
    所述第一凹槽前方、导光结构物方端面开设的第二凹槽的槽底形成的分光反射型面；
    所述第一凹槽侧方、导光结构像方端面开设的第三凹槽的槽底形成的背向反射型面；
    所述第三凹槽前方、所述出光型面外侧、导光结构物方壁面形成的出射前反射型面；
    光路包括来自照明器的光经聚光型面射入导光结构内，并依次经所述分光反射型面、背向反射型面、出射前反射型面，最后从所述出光型面出射打向物面。
  8. 如权利要求7所述的杂散光遮蔽结构，其特征在于：
    所述多重反射型面还包括：
    所述第一凹槽上下、导光结构外壁形成的对向反射形面；
    所述镜头安装通孔上下、导光结构像方端面开设的第四凹槽的槽底形成的两侧补光反射型面；
    光路还包括来自照明器的光经聚光型面射入导光结构内，并依次经所述分光反射型面、对向反射形面、两侧补光反射型面、出射前反射型面，最后从所述出光型面出射打向物面。
  9. 如权利要求8所述的杂散光遮蔽结构，其特征在于：
    所述多重反射型面还包括：
    所述镜头安装通孔远离所述聚光型面的远端侧、导光结构外壁形成的对向二次反射型面；
    导光结构像方端面开设的第五凹槽的槽底形成的背向对称反射型面，所述第五凹槽与所述第三凹槽相对所述镜头安装通孔对称设置；
    光路还包括来自照明器的光经聚光型面射入导光结构内，并由所述对向二次反射型面将射向其的光反射至所述背向对称反射型面，最后从所述出光型面出射打向物面。
  10. 一种超微距成像模块，其特征在于：包括超微距镜头及安装于外壳的导光结构、安装于所述导光结构的如权利要求1-9任一项所述的杂散光遮蔽结构。
PCT/CN2021/089430 2021-01-08 2021-04-23 一种杂散光遮蔽结构、包含其的超微距成像模块 WO2022147926A1 (zh)

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