CN213957668U - Stray light shielding structure and ultramicro-distance imaging module comprising same - Google Patents
Stray light shielding structure and ultramicro-distance imaging module comprising same Download PDFInfo
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- CN213957668U CN213957668U CN202120053254.5U CN202120053254U CN213957668U CN 213957668 U CN213957668 U CN 213957668U CN 202120053254 U CN202120053254 U CN 202120053254U CN 213957668 U CN213957668 U CN 213957668U
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Abstract
The utility model discloses a stray light shields structure, its characterized in that: the stray light shielding structure comprises a front protection window with silk screen arranged in front of the object side end face of the ultramicro-lens in the lens mounting through hole of the light guide structure, a shading ring arranged between the edge side wall of the front protection window and the lens mounting through hole and extending forwards and backwards, and the like. The utility model discloses a protection window of shading ring surrounding band silk screen printing has stopped to squeeze into the formation of image that the camera lens caused after a large amount of illumination light gets into the protection window and has dazzled the light influence, and has stopped its scattered light of illumination light entering protection window back and has lighted the influence that surface impurity led to the fact to imaging quality, furtherly, module back protection window adopts silk screen printing and gum to shield stray light, has stopped the influence of super little module and equipment camera lens between miscellaneous astigmatism to imaging effect, and the total imaging quality promotes.
Description
Technical Field
The utility model belongs to external optical imaging field, concretely relates to stray light shields structure, contains its super microspur imaging module.
Background
With the development of optical imaging technology, more and more instruments and devices and consumer products are added with imaging devices, the diversity and importance of functions of the imaging devices are higher and higher, and various imaging modules are layered on the market, but in the field of ultra-micro distance imaging, no mature modular product exists at present.
Regarding imaging module aspect, present ordinary macro module is mostly the manual focusing module of installing wide angle macro camera lens, and it is Ni mends the defect that the illumination is not enough, often simply arranges illuminating lamp pearl around the camera lens and throws light on to its formation of image field of vision in, like the chinese utility model patent publication that application number is CN200720057106.0 to and the chinese utility model patent publication that application number is CN201320093315.6, the main shortcoming of this scheme is:
1) due to the limitation of the wide-angle macro lens, the module cannot realize focusing through automatic focusing of the lens of the mobile device, and the manual focusing operation is inconvenient in actual use and difficult to directly shoot clear images.
2) The illumination light source is lamp pearl direct irradiation, removes the in-process at the object space, and very big change can take place for the even degree of actual illuminating effect, especially under the super microspur imaging environment that the object plane is very close, and the illumination can be seriously not enough, and this kind of illumination mode has stronger and comparatively concentrated reflection when observing high anti-surface, influences the imaging quality.
3) The lighting element needs to be supplied with power independently, instead of directly using a common flash lamp LED light source on the current mobile equipment, and the situation that the same type of battery needs to be charged or replaced after the electric quantity of the battery is exhausted exists, so that the use is inconvenient.
Change illumination light source outgoing angle, add the guide part for light, and methods such as control LED luminous angle can all make the illumination problem improve, for example, Chinese utility model patent that application number is CN201720470643.1 discloses a case that improves to the illumination of macro imaging module through the structure of similar optic fibre, the specific luminous angle of its lamp pearl has also made the requirement, the advantage of this scheme is that the limited problem of macro imaging module light filling has been solved, but its part is more, the structure is too complicated, the installation degree of difficulty is higher, be unfavorable for the miniaturization and the integration of module, and cost-push.
The chinese utility model with application number CN201920098694.5 discloses a scheme for improving a macro imaging module by a light guide structure, which has the advantages of making the illumination of the macro imaging module uniform and controlling the overall volume, however, the optical lens with a symmetrical structure integrated with the auto-focusing module in this solution has not been finished, the module is arranged in the equipment as a whole, and needs to consider the occupation of the whole volume and the stray light shielding in the machine body, the design and manufacture difficulty and the cost are higher, the Chinese patent with application number of CN201811055795.0 discloses a micro-distance module which is externally connected with an equipment camera and illuminates by utilizing a light guide structure, in the proposal, an illumination light source is a built-in circuit and a light emitting diode, and the LED flash lamp of the device is not directly utilized, so that the cost of the product is increased, the battery needs to be replaced, and the use is inconvenient.
The invention has been published in the patent of chinese invention with application number CN201811003701.5, a macro imaging module for illuminating object plane by light guiding structure, the lens is externally connected to image with the camera of the device, the used light source is the flash light source of the device itself, it is suitable for various types of devices and the structure is simple and easy to use, but the invention has the common defects that the module lens is directly contacted with the outside, the outside lens is easy to be damaged or polluted, and the reliability is not high.
Chinese patents with application numbers CN201922072118.6 and CN201922072041.2 disclose a mobile terminal, in which at least one of a plurality of lenses is a main shooting lens and at least one is an ultra-macro lens, so that ultra-micro shooting can be realized, and the requirement of close-range ultra-micro shooting is met; however, the scheme requires that the mobile phone terminal has an ultramicro-range lens, and cannot meet the requirement of ultramicro-range shooting of a common mobile phone without the ultramicro-range lens.
The miniaturized ultramicro-distance imaging module and the imaging equipment using the miniaturized ultramicro-distance imaging module have great application prospect and value in the fields of biological medicine, intelligent manufacturing, consumer electronics and the like, and a product capable of comprehensively solving the problems is lacking at present.
SUMMERY OF THE UTILITY MODEL
At least one in defect or improvement demand more than prior art, the utility model provides a stray light shields structure and contains its super long-range imaging module, the protection window of shading ring surrounding band silk screen printing has been adopted, the formation of image that squeezes into the camera lens and cause dazzles the light influence after having stopped a large amount of illumination light entering protection window, and stopped its scattered light after the illumination light entering protection window and lighted the influence that surperficial impurity led to the fact to imaging quality, furtherly, module back protection window adopts silk screen printing and gum to shield stray light, the influence of the miscellaneous astigmatism to the formation of image effect between super long-range module and equipment camera lens has been stopped, overall imaging quality promotes.
To achieve the above object, according to one aspect of the present invention, there is provided a stray light shielding structure including a front protection window disposed in front of an object side end surface of an macro lens in a lens mounting through hole of a light guide structure;
the light guide structure is made of semitransparent or transparent solid materials and is detachably connected to portable imaging equipment with a camera and an illuminator, a lens mounting through hole of the light guide structure faces the camera, the object side end face of the light guide structure is closer to the object surface than the front protection window in a protruding mode, and the annular inner side in the protruding mode forms a light emitting profile; the light guide structure covers the illuminator, guides the illumination light of the illuminator into the illuminator and guides the illumination light out of the light outlet molded surface to the object surface;
the front protection window is made of a light-transmitting solid material, the periphery of the image side end face of the front protection window and the side wall of the edge of the front protection window are provided with a front protection window screen printing, and the front protection window screen printing does not shield the visual angle of the lens;
the stray light shielding structure further comprises a shading ring, the shading ring is arranged between the edge side wall of the front protection window and the lens mounting through hole and extends forwards and backwards, and the distance from the object side end face of the shading ring to the object plane is smaller than or equal to the distance from the object side end face of the front protection window to the object plane.
Preferably, the front protection window is made of solid materials with good light transmission performance, such as glass, sapphire or transparent plastics, and the like, is uniform in thickness and is positioned in front of the object side end face of the lens. And the thickness of the lens does not influence the focal plane range and the imaging quality of the lens. The size of the protective window is not required to enable the edge of the protective window to enter the visual field of the lens, and the protective window can be adhered to the lens or other structures by using back glue or dispensing glue and can also be directly mechanically matched or embedded into other structures.
Preferably, the light-shielding ring may be a part of the object side of the lens package, or may be an independent component, the light-shielding ring is made of opaque solid such as metal, non-transparent plastic, or the like, the structure of the light-shielding ring surrounds the edge sidewall of the protection window, or has a step surface to surround the edge region surface of the image side end surface of the protection window, and the distance from the object side end surface of the light-shielding ring to the object surface is less than or equal to the distance from the object side end surface of the protection window to the object surface.
Preferably, the stray light shielding structure further comprises a back protection window made of a light-transmitting solid material and arranged behind the end face of the image side of the lens, the lens is sealed in the light guide structure by the front and back protection windows, and the edge of the back protection window does not enter the field of view of the camera of the portable imaging device. Specifically, the back protection window is made of solid materials with good light transmission performance such as glass, sapphire or transparent plastics and the like, is uniform in thickness and is located behind the image side end face of the lens. The thickness of the lens does not affect the focal plane range and the imaging quality of the lens, and the size of the lens does not enable the edge of the lens to enter the visual field range of the camera of the portable imaging equipment in the mounting state.
Preferably, the object side end face of the back protection window is provided with a back protection window screen printing, and the back protection window screen printing does not enter the visual field range of the camera of the portable imaging device, so that a screen printing lens through hole is formed. If the back protection window covers the illuminator of the portable imaging device in the mounted state, the front partial area of the illuminator should not be silkscreened.
Preferably, the illuminator of the portable imaging device is not covered by the screen printing of the back protection window, and a screen printing illuminating through hole is formed.
Preferably, the object side end face of the back protection window is provided with a back adhesive for bonding the back protection window and the light guide structure, and the projection area of the back adhesive is not larger than the area of the screen printing of the back protection window.
Preferably, the front end face and the rear end face of the front protection window and/or the back protection window are provided with functional coating films, such as an antireflection film (antireflection film), a hard-coating film, a hydrophobic and oleophobic film and the like.
Preferably, the image side end face of the light guide structure is provided with a first groove which is right opposite to the illuminator, and the bottom of the groove forms a light-gathering profile;
be provided with multiple reflection profile in the light-directing structure, include:
a light splitting and reflecting molded surface is formed at the front of the first groove and at the bottom of a second groove formed on the object side end surface of the light guide structure;
a back reflection molded surface is formed at the bottom of a third groove arranged at the side of the first groove and on the image side end surface of the light guide structure;
an emergent front reflection molded surface formed in front of the third groove, outside of the emergent molded surface and the object side wall surface of the light guide structure;
the light path comprises light from the illuminator, which is emitted into the light guide structure through the light-condensing molded surface, sequentially passes through the light-splitting reflecting molded surface, the backward reflecting molded surface and the emergent front reflecting molded surface, and finally is emitted out of the emergent molded surface to the object surface.
Preferably, the multiple reflection profile further comprises:
the first groove is formed in the opposite direction of the light guide structure;
the light supplementing reflection molded surfaces at two sides are formed at the upper and lower parts of the lens mounting through hole and the bottom of a fourth groove formed in the image side end surface of the light guide structure;
the light path also comprises a light source, a light condensing profile, a light splitting reflecting profile, a light supplementing reflecting profile on two sides, an emergent front reflecting profile and an emergent object surface, wherein the light from the illuminator is emitted into the light guide structure through the light condensing profile, and is emitted out of the emergent object surface in sequence.
Preferably, the multiple reflection profile further comprises:
the lens mounting through hole is far away from the far end side of the light-gathering molded surface and an opposite secondary reflection molded surface formed on the outer wall of the light guide structure;
a back-to-back symmetrical reflection molded surface is formed at the bottom of a fifth groove formed in the image side end surface of the light guide structure, and the fifth groove and the third groove are symmetrically arranged relative to the lens mounting through hole;
the light path also comprises a light source, a light guide structure and an opposite secondary reflection profile, wherein the light from the illuminator is emitted into the light guide structure through the light condensation profile, the light emitted to the light guide structure is reflected to the back symmetrical reflection profile through the opposite secondary reflection profile, and finally the light is emitted out of the light emitting profile and is emitted to an object surface.
In order to achieve the above object, according to an aspect of the present invention, there is provided an ultramicro imaging module, including an ultramicro lens and a light guide structure mounted on a housing, mounted on the light guide structure, the stray light shielding structure.
To achieve the above object, according to one aspect of the present invention, there is provided a light guide structure having multiple reflective surfaces, the light guide structure being made of a translucent or transparent solid material and detachably connected to a portable imaging device having a camera and an illuminator, the light guide structure being provided with a lens mounting through hole and facing the camera, an object side end surface of the light guide structure being closer to an object surface than a front side of a lens package object side end surface, an annular inner side of the front side forming a light emitting surface, illumination light entering the light guide structure finally being incident on the object surface through refraction or scattering of the surface;
the lens mounted in the lens mounting through hole is an ultra-micro lens; the lens comprises a lens group and a lens package which is positioned right in front of a camera of the portable imaging device in a connection state when in use; the lens mounting through hole is a circular through hole, the inner structure of the through hole can be provided with steps, the light guide structure is connected with the lens in a gluing mode and the like, and the diameter of any position of the through hole is larger than that of the position of the lens package in the mounting state;
the image side end face of the light guide structure is provided with a first groove which is right opposite to the illuminator, and the bottom of the groove forms a light-gathering molded surface;
the light guide structure is internally provided with a multiple reflection molded surface for reflecting the illumination light transmitted inside the light guide structure, so that the illumination condition and the imaging effect of an object space are optimized; the method specifically comprises the following steps:
a light splitting and reflecting molded surface is formed at the front of the first groove and at the bottom of a second groove formed on the object side end surface of the light guide structure;
a back reflection molded surface is formed at the bottom of a third groove arranged at the side of the first groove and on the image side end surface of the light guide structure;
an emergent front reflection molded surface formed in front of the third groove, outside of the emergent molded surface and the object side wall surface of the light guide structure;
the light path comprises light from the illuminator, which is emitted into the light guide structure through the light-condensing molded surface, sequentially passes through the light-splitting reflecting molded surface, the backward reflecting molded surface and the emergent front reflecting molded surface, and finally is emitted out of the emergent molded surface to the object surface.
Preferably, the multiple reflection profile further comprises:
the first groove is formed in the opposite direction of the light guide structure;
the light supplementing reflection molded surfaces at two sides are formed at the upper and lower parts of the lens mounting through hole and the bottom of a fourth groove formed in the image side end surface of the light guide structure;
the light path also comprises a light source, a light condensing profile, a light splitting reflecting profile, a light supplementing reflecting profile on two sides, an emergent front reflecting profile and an emergent object surface, wherein the light from the illuminator is emitted into the light guide structure through the light condensing profile, and is emitted out of the emergent object surface in sequence.
Preferably, the multiple reflection profile further comprises:
the lens mounting through hole is far away from the far end side of the light-gathering molded surface and an opposite secondary reflection molded surface formed on the outer wall of the light guide structure;
a back-to-back symmetrical reflection molded surface is formed at the bottom of a fifth groove formed in the image side end surface of the light guide structure, and the fifth groove and the third groove are symmetrically arranged relative to the lens mounting through hole;
the light path also comprises a light source, a light guide structure and an opposite secondary reflection profile, wherein the light from the illuminator is emitted into the light guide structure through the light condensation profile, the light emitted to the light guide structure is reflected to the back symmetrical reflection profile through the opposite secondary reflection profile, and finally the light is emitted out of the light emitting profile and is emitted to an object surface.
Preferably, the light-emitting profile is a conical surface, or an arc surface, or a combination of the two.
Preferably, the light-gathering profile is a curved surface, or a combination of different curved surfaces, or a combination of flat surfaces, or a combination of a curved surface and a flat surface.
Preferably, each of the multiple reflection profiles is independently selected from one of a plane, a curved surface, and a combination of a plane and a curved surface.
Preferably, a scattering layer, which may be a white coating or a covering material, is partially or completely disposed on an outer surface of the light guide structure, and is used for sufficiently reflecting and scattering light rays inside the light guide structure, and the scattering layer does not cover the light condensing profile and the light emitting profile of the light guide structure.
Preferably, the light guide structure is symmetrically disposed with respect to a longitudinal section of the through-lens mounting through-hole and a center of the first groove.
Preferably, the two opposite reflecting surfaces are symmetrically arranged at two sides of the second groove.
Preferably, an even number of the opposite secondary reflection profiles are symmetrically wavy on the whole, and the pairs of the opposite secondary reflection profiles form outward bulges.
Preferably, the lens package in front of the macro lens includes a front protection window.
In order to achieve the above object, according to another aspect of the present invention, there is provided an ultra-micro distance imaging module, comprising a lens, and a light guide structure, a front protection window, and a back protection window, which are mounted on the multi-reflective surface of the housing;
the lens is installed in light guide structure's camera lens installation through-hole, is equipped with in proper order from beginning to end preceding protection window and back protection window.
Preferably, the housing is made of a solid material with certain rigidity, such as metal or plastic, or is formed by connecting structural members made of a plurality of materials, a cavity is formed in the housing and used for accommodating and connecting the light guide structure and the structures, such as a lens, a shading ring and a protective window, which are arranged on the light guide structure, and the object side end face of the housing does not exceed the object plane.
Preferably, the imaging system further comprises a connector, which is located on the housing, and can be a magnet, an adhesive or other mechanical structure, for positioning and securing the subminiature distance imaging module on the portable imaging device.
The utility model discloses a light-directing structure of many reflection profiles and the super microspur imaging module who contains it through the optimal design of structure for imaging module is small and exquisite, light, and the reliability is high, and imaging quality is good.
The utility model discloses a light-directing structure of many reflection profiles and the super micro-distance imaging module who contains it form multichannel leaded light path through constructing many reflection profiles for the illumination that comes from portable imaging device illuminator is sufficient, and the homogeneity is high, easily makes and assembles simultaneously.
The above-described technical features may be combined with each other as long as they do not conflict with each other.
Generally, through the utility model discloses above technical scheme who conceives compares with prior art, has following beneficial effect:
1. the utility model discloses a stray light shields structure and contains its super microspur imaging module, has adopted the protection window of shading ring surrounding band silk screen printing, has stopped to squeeze into the formation of image that the camera lens caused after a large amount of illumination light gets into the protection window and has dazzled the light influence, and has stopped its scattered light of illumination light entering protection window after and has lighted the influence that surface impurity led to the fact imaging quality.
2. The utility model discloses a stray light shields structure and contains its super long-pending imaging module of micrometric, module back protection window adopt silk screen printing and gum to shield stray light, have stopped the influence of super small-distance module and equipment camera lens miscellaneous astigmatism to the imaging effect, and the total imaging quality promotes.
3. The utility model discloses a stray light shields structure and contains its super micro-distance imaging module, the back protection window of adoption will have the camera lens of object space protection window to seal completely from the other end, has avoided external pollution and the damage to lens itself, and the reliability is high.
Drawings
Fig. 1 is a schematic cross-sectional view of an ultra-micro distance imaging module according to an embodiment of the present invention in a use state;
FIG. 2 is a schematic view of a portion of an illumination path of the light guide structure of the imaging module in the configuration of FIG. 1;
FIG. 3 is a schematic view of another part of the illumination path of the light guide structure of the imaging module in the configuration of FIG. 1;
fig. 4 is a schematic structural section view of the ultra-micro distance imaging module of the present invention;
FIG. 5 is a partially enlarged schematic cross-sectional view of the stray light shielding structure of FIG. 4;
FIG. 6 is a schematic cross-sectional view of an ultra-micro distance imaging module according to another embodiment of the present invention;
FIG. 7 is a schematic diagram of a portion of an illumination path of a light guide structure in another embodiment;
FIG. 8 is a schematic view of another part of the illumination path of another light guide structure in another embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other. The present invention will be described in further detail with reference to the following embodiments.
As shown in fig. 1-5, the present invention provides an ultra-micro distance imaging module, which is detachably connected to a portable imaging device having a camera and an illuminator, the imaging device 3 is a digital product such as a smart phone or a tablet computer, and 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 wherein the illuminator 302 can be a flash lamp or other light supplement lamp of the device.
The lens 101 of the ultra-micro imaging module 1 comprises a lens group 1011 and a lens package 1012; the lens 101 is located right in front of the camera 301 of the portable imaging device 3 in the connected state of the ultra-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, meanwhile, the lens mounting through hole 1021 on the light guide structure 102 is a step hole, which has a through hole step surface of 10211, the light guide structure 102 and the lens 101 are bonded by glue (not shown in the figure), the image side end surface 1022 of the light guide structure is flush with the image side end surface 1013 of the lens after mounting, and the distance between the object side end surface 1023 of the light guide structure and the object side end surface 1014 of the lens is 0.1-20mm, preferably 0.8-1 mm.
The light-emitting profile 1024 is arranged on the circular edge of the light-guiding structure 102 where the lens mounting through hole 1021 and the object side end face 1023 intersect, the shape of the light-emitting profile is a conical surface, as shown in fig. 2 and 4, the included angle between the generatrix 10241 and the object side end face of the light-guiding structure is 20 degrees to 45 degrees, preferably, the included angle is 33 degrees, the emergent light 10242 emitted by the refraction or scattering of the illuminating light through the light-emitting profile 1024 is irradiated to the object side, and the object side is enabled to form uniform illumination
The light guide structure 102 is provided with a multi-reflection profile 1025, as shown in the cross-sectional view of fig. 2 and fig. 3, in this embodiment, the multi-reflection profile includes: the light-splitting reflective profile 10251, the opposite reflective profile 10252, the opposite secondary reflective profile 10253, the back reflective profile 10254, the two-sided fill light reflective profile 10255, the exit front reflective profile 10256, the back symmetrical reflective profile 10257, the light path of the reflected light inside thereof is as shown in fig. 2-4, and the above multiple reflective profiles 1025 are planar in this embodiment.
Preferably, the image side 1023 of the light guide structure 102 has a light converging profile 1026, the light converging rays 10261 of which are shown in fig. 4, the surface of which is a part of a sphere, which in the installed state shown in fig. 1 is centered in the region directly in front of the illuminator 302 of the portable imaging device.
Details are described in detail below.
The image side end face of the light guide structure is provided with a first groove which is right opposite to the illuminator, and the bottom of the groove forms a light-condensing molded surface 1026;
a multiple reflection molded surface 1025 is arranged in the light guide structure and is used for reflecting the illumination light transmitted inside the light guide structure so as to optimize the illumination condition and the imaging effect of an object; the method specifically comprises the following steps:
a light splitting and reflecting molded surface 10251 formed at the bottom of a second groove arranged in front of the first groove and on the object side end surface of the light guide structure;
a back reflection molded surface 10254 formed at the bottom of a third groove formed at the side of the first groove and on the image side end surface of the light guide structure;
an emergent front reflection molded surface 10256 formed in front of the third groove, outside of the emergent molded surface and object side wall surface of the light guide structure;
the light path comprises light from the illuminator, which is emitted into the light guide structure through the light-condensing molded surface, sequentially passes through the light-splitting reflecting molded surface, the backward reflecting molded surface and the emergent front reflecting molded surface, and finally is emitted out of the emergent molded surface to the object surface.
Preferably, the multiple reflection profile further comprises:
an opposite reflection surface 10252 formed by the upper and lower parts of the first groove and the outer wall of the light guide structure;
the two sides of the light supplementing reflection molded surface 10255 are formed at the bottom of a fourth groove formed in the image side end surface of the light guide structure and on the upper and lower parts of the lens mounting through hole;
the light path also comprises a light source, a light condensing profile, a light splitting reflecting profile, a light supplementing reflecting profile on two sides, an emergent front reflecting profile and an emergent object surface, wherein the light from the illuminator is emitted into the light guide structure through the light condensing profile, and is emitted out of the emergent object surface in sequence.
Preferably, the multiple reflection profile further comprises:
the lens mounting through hole is far away from the far end side of the light-gathering molded surface and an opposite secondary reflection molded surface 10253 formed on the outer wall of the light guide structure;
a back-to-back symmetrical reflection molded surface is formed at the bottom of a fifth groove formed in the image side end surface of the light guide structure, and the fifth groove and the third groove are symmetrically arranged relative to the lens mounting through hole;
the light path also comprises a light source, a light guide structure and an opposite secondary reflection profile, wherein the light from the illuminator is emitted into the light guide structure through the light condensation profile, the light emitted to the light guide structure is reflected to the back symmetrical reflection profile through the opposite secondary reflection profile, and finally the light is emitted out of the light emitting profile and is emitted to an object surface.
Preferably, the light-exiting profile 1024 is a tapered surface, a cambered surface, or a combination thereof.
Preferably, the light-gathering profile 1026 is a curved surface, or a combination of different curved surfaces, or a combination of flat surfaces, or a combination of a curved surface and a flat surface.
Preferably, each of the multiple-reflection profiles 1025 is independently selected from one of a flat surface, a curved surface, and a combination of a flat surface and a curved surface.
Preferably, a scattering layer, which may be a white coating or a covering material, is partially or completely disposed on an outer surface of the light guide structure, and is used for sufficiently reflecting and scattering light rays inside the light guide structure, and the scattering layer does not cover the light condensing profile and the light emitting profile of the light guide structure.
Preferably, the light guide structure is symmetrically disposed with respect to a longitudinal section of the through-lens mounting through-hole and a center of the first groove.
Preferably, the two opposite reflective surfaces 10252 are symmetrically disposed at two sides of the second groove.
Preferably, an even number of the facing secondary reflective profiles 10253 are symmetrically waved in their entirety, and pairs of the facing secondary reflective profiles form outward protrusions.
Preferably, the lens package in front of the macro lens includes a protection window 103.
As shown in fig. 5, the protection window 103 is made of glass material, has a thickness of 0.3mm-0.8mm, does not affect the focal plane range and imaging quality of the lens, and is located in front of the object side end 1014 of the lens. The appearance is round, the diameter is 7-15mm, and the edge of the lens does not enter the visual field of the lens.
The distance from the object space end surface 1031 of the protection window to the object surface is greater than the distance from the object space end surface 1023 of the light guide structure to the object surface, and the distance between the two parallel end surfaces is 0.1-1 mm. The protection window image side end surface 1032 is provided with a silk screen 1033, the color of the protection window image side end surface is black, no silk screen is shielded right in front of the lens visual field range of the protection window object side end surface 1031, and silk screen edges do not enter the visual field of the lens 101.
In this embodiment, the image side surface 1032 of the protection window is adhered with a double-sided adhesive 1034 with a black color and an overall thickness of 0.05-0.3 mm. The double-sided adhesive tape 1034 is provided with a through hole in the front of the visual field range of the lens 101, and the edge of the through hole does not block the lens
In this embodiment, the surface of the object side surface 1031 of the protection window has a hydrophobic and oleophobic film (not shown).
As shown in fig. 4-5, the bezel 104 is made of opaque solid material such as metal, opaque plastic, etc., in this embodiment, the bezel 104 is independent of the lens package and is in the form of a two-end hollow cylinder with a step surface, a side wall 1041 of the bezel surrounds a side wall at the edge of the protection window, a distance from an object side end surface 1042 of the protection window in a mounted state is less than or equal to a distance from an object side end surface 1031 of the protection window to the object side, and a projection of the step surface 1043 is overlapped with a projection area at the edge of an image side end surface 1032 of the protection window.
As shown in fig. 4-5, the back protection window 105 is made of a solid material with good light transmission property, such as glass, sapphire or transparent plastic, and has a uniform thickness, in this embodiment, the thickness is 0.3-0.8mm, and the thickness does not affect the focal plane range and the imaging quality of the lens, and the back protection window is located behind the image side end surface 1013 of the lens, and has a size that the edge of the back protection window is not allowed to enter the visual field range of the camera 301 of the portable imaging device in the installation state.
In this embodiment, 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, in this embodiment, the diameter of the through hole 10521 of the screen printing lens is smaller than the diameter of the lens image side end surface 1014 and larger than the diameter of the circle formed by the intersection of the lens image side field angle and the object side end surface 1051 of the back protection window, that is, the screen printing 1052 can shield part of the lens image side end surface 1013 without affecting the normal imaging of the lens 101.
In this embodiment, the back protection window 105 covers the illuminator 302 of the portable imaging device in the mounted state, and the front portion of the illuminator 302 is silk-screened with the silk-screened illuminating through holes 10522.
In this embodiment, the object side end surface 1051 of the back protection window has a back protection window adhesive 1053 for connecting the back protection window to the housing 106 or the light guide structure 102, the adhesive does not cover the circle formed by the intersection of the lens image side viewing angle 1015 and the object side end surface 1051 of the back protection window, and the projection does not cover the necessary light-transmitting area above the equipment illuminator 302 in the installed state.
Preferably, the back glue and the silk screen printing color of the back protection window and the lens protection window are black.
In this embodiment, the backside protection window image side surface 1054 can have a hydrophobic and oleophobic membrane (not shown).
As shown in fig. 5 (in the figure, the light path is an original light path in an unshielded state to highlight the shielding effect), in this embodiment, the light shielding ring 104 shields all stray light entering from the side surface and the image side end surface of the lens protection window 103, the protection window screen print 1033 shields most of the large-angle light entering from the edge of the object side end surface of the lens protection window 103, and the back protection window gum 1053 shields most of the stray light emitted from the image side end surface of the light guide structure 102 and the wall of the lens installation through hole and possibly entering the camera of the apparatus.
As shown in fig. 1, in this embodiment, the housing 106 is made of a solid material with certain rigidity, such as metal or plastic, and has a cavity therein for accommodating and connecting the light guiding structure and the lens, the light shielding ring, and the protection window mounted thereon, and the object side end surface of the housing must not exceed the object side.
In this embodiment, the connecting member 107 is a magnet 1071, the two parts of magnets are respectively located in the module housing and the device, the magnetic poles of the two parts of magnets are different and correspond to each other, the magnetic force of the two parts of magnets after being closed to each other laterally positions and longitudinally fastens the macro imaging module on the corresponding position of the portable imaging device 3, the lens 1 of the macro imaging module is located right in front of the camera 301 of the portable imaging device, and the light-condensing profile 1026 of the light guiding structure 102 is located right in front of the illuminator 302 of the portable imaging device.
As another form, as shown in fig. 6 to 8, the present invention provides an ultra-fine pitch imaging module detachably connected to a portable imaging apparatus having a camera and an illuminator, with the following changes compared to the foregoing.
The light guide structure 102 is made of transparent plastic, meanwhile, 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 light guide structure lens mounting hole thread 10212 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 jig (not shown in the figure), and the distance is 0.8-1 mm.
The light-emitting profile 1024 is disposed on the circular edge of the light-guiding structure 102 where the lens mounting through hole 1021 and the object-side end face 1023 intersect, and the shape of the light-emitting profile is an annular curved surface, so that the emergent light 10242 emitted by the refraction or scattering of the illumination light through the light-emitting profile 1024 is incident on the object surface as shown in the planar view of fig. 2, and the object surface forms uniform illumination
The light guide structure 102 is provided with a multi-reflection profile 1025, as shown in the cross-sectional view of fig. 2 and fig. 3, in this embodiment, the multi-reflection profile includes: the light-splitting reflective surface 10251, the opposite reflective surface 10252, the opposite secondary reflective surface 10253, the back reflective surface 10254, the two-side supplementary light reflective surface 10255, the emergent front reflective surface 10256, the back symmetrical reflective surface 10257, and the light path schematic diagram of the reflected light inside thereof are shown in fig. 6-8, and the above multiple reflective surface 1025 is a curved surface in this embodiment.
In this embodiment, the outer surface of the light guide structure 102 has a scattering layer, which may be a solid material sprayed or coated on the outer surface of the light guide structure or a cavity surface where the outer shell is attached to the light guide structure, and the scattering layer is a high-reflectivity color such as white or silver.
Preferably, the image side surface 1023 of the light guide structure 102 has a light-condensing profile 1026, which in this embodiment is a pyramidal surface consisting of multiple inclined planes centered in the region directly in front of the illuminator 302 of the portable imaging device in the mounted state as shown in fig. 6.
In this embodiment, the protection window 103 is made of glass material, has a thickness of 0.3mm-0.8mm, does not affect the focal plane range and imaging quality of the lens, and is located in front of the object side end 1014 of the lens. The appearance is round, the diameter is 7-15mm, and the edge of the lens does not enter the visual field of the lens. The distance from the object space end surface 1031 of the protection window to the object surface is greater than the distance from the object space end surface of the light guide structure to the object surface, and the distance between the two parallel end surfaces is 0.1-1 mm. In this embodiment, the surface of the object-side end surface 1031 of the protection window has a hydrophobic and oleophobic film and an antireflection film (not shown).
In this embodiment, the bezel 104 is integrated with the lens package, and is in the form of a ring-shaped thin wall with a step surface, the material of the bezel is the same as that of the lens package, the bezel sidewall 1041 surrounds the edge sidewall of the protection window, and the distance from the object side end surface 1042 of the bezel to the object side is smaller than or equal to the distance from the object side end surface 1031 of the protection window to the object side. The image side end surface 1032 of the protection window is adhered to the step surface 1043 of the shading ring 104 by dispensing.
The back protection window 105 is made of solid materials with good light transmission performance such as glass, sapphire or transparent plastics and the like, is uniform in thickness, is 0.3-0.8mm in thickness in the embodiment, does not affect the focal plane range and the imaging quality of the lens, is positioned behind the image side end surface 1013 of the lens, and has a size which can prevent the edge of the back protection window from entering the visual field range of the camera 301 of the portable imaging device in the installation state.
Preferably, the object side end 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. In the mounted state, the back protection window covers only the image side surface 1013 of the lens 101.
In this embodiment, the backside protection window image side surface 1054 can have a hydrophobic and oleophobic membrane (not shown).
In this embodiment, the connector 107 is a double-sided tape 1072, which is located in a slot opened by the housing or the light guide structure, and is pre-attached to and pressed against the imaging module, and when in use, the other side of the double-sided tape is attached to a protection window outside the camera of the device, and the lens 1 of the ultra-macro imaging module in the aligned condition is located right in front of the camera 301 of the portable imaging device, and the light-gathering profile 1026 of the light guide structure 102 is located in the right front area of the illuminator 302 of the portable imaging device.
To sum up, compare with prior art, the utility model discloses a scheme has following apparent advantage:
the utility model discloses a light-directing structure of many reflection profiles and the super microspur imaging module who contains it through the optimal design of structure for imaging module is small and exquisite, light, and the reliability is high, and imaging quality is good.
The utility model discloses a light-directing structure of many reflection profiles and the super micro-distance imaging module who contains it form multichannel leaded light path through constructing many reflection profiles for the illumination that comes from portable imaging device illuminator is sufficient, and the homogeneity is high, easily makes and assembles simultaneously.
It will be appreciated that the embodiments of the system described above are merely illustrative, in that elements illustrated as separate components may or may not be physically separate, may be located in one place, or may be distributed over different network elements. Some or all of the modules can be selected according to actual needs to achieve the purpose of the scheme of the embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
In addition, it should be understood by those skilled in the art that in the specification of the embodiments of the present invention, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
In the description of the embodiments of the present invention, a large number of specific details are explained. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description. Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the embodiments of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects.
However, the disclosed method should not be interpreted as reflecting an intention that: rather, the claimed embodiments of the invention require more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of an embodiment of this invention.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the embodiments of the present invention, and not to limit the same; although the embodiments of the present invention have been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A stray light shielding structure is characterized in that: the stray light shielding structure comprises a front protection window which is arranged in front of the object side end face of the ultramicro lens in the lens mounting through hole of the light guide structure;
the light guide structure is made of semitransparent or transparent solid materials and is detachably connected to portable imaging equipment with a camera and an illuminator, a lens mounting through hole of the light guide structure faces the camera, the object side end face of the light guide structure is closer to the object surface than the front protection window in a protruding mode, and the annular inner side in the protruding mode forms a light emitting profile; the light guide structure covers the illuminator, guides the illumination light of the illuminator into the illuminator and guides the illumination light out of the light outlet molded surface to the object surface;
the front protection window is made of a light-transmitting solid material, the periphery of the image side end face of the front protection window and the side wall of the edge of the front protection window are provided with a front protection window screen printing, and the front protection window screen printing does not shield the visual angle of the lens;
the stray light shielding structure further comprises a shading ring, the shading ring is arranged between the edge side wall of the front protection window and the lens mounting through hole and extends forwards and backwards, and the distance from the object side end face of the shading ring to the object plane is smaller than or equal to the distance from the object side end face of the front protection window to the object plane.
2. A stray light shielding structure according to claim 1, wherein:
the stray light shielding structure further comprises a back protection window made of a light-transmitting solid material and arranged behind the end face of the image side of the lens, the lens is sealed in the light guide structure through the front protection window and the back protection window, and the edge of the back protection window does not enter the visual field range of the camera of the portable imaging device.
3. A stray light shielding structure according to claim 2, wherein:
the object side end face of the back protection window is provided with a back protection window screen printing, and the back protection window screen printing does not enter the visual field range of the camera of the portable imaging equipment, so that a screen printing lens through hole is formed.
4. A stray light shielding structure according to claim 3, wherein:
the back protection window silk screen printing does not cover the illuminator of the portable imaging device, and silk screen printing illumination through holes are formed.
5. A stray light shielding structure according to claim 3, wherein:
the object space end face of the back protection window is provided with a back adhesive for bonding the back protection window and the light guide structure, and the projection area of the back adhesive is not larger than the area of the screen printing of the back protection window.
6. A stray light shielding structure according to claim 2, wherein:
the front end face and the rear end face of the front protection window and/or the back protection window are/is provided with functional coating films.
7. A stray light shielding structure according to claim 1, wherein:
the image side end face of the light guide structure is provided with a first groove which is right opposite to the illuminator, and the bottom of the groove forms a light-gathering molded surface;
be provided with multiple reflection profile in the light-directing structure, include:
a light splitting and reflecting molded surface is formed at the front of the first groove and at the bottom of a second groove formed on the object side end surface of the light guide structure;
a back reflection molded surface is formed at the bottom of a third groove arranged at the side of the first groove and on the image side end surface of the light guide structure;
an emergent front reflection molded surface formed in front of the third groove, outside of the emergent molded surface and the object side wall surface of the light guide structure;
the light path comprises light from the illuminator, which is emitted into the light guide structure through the light-condensing molded surface, sequentially passes through the light-splitting reflecting molded surface, the backward reflecting molded surface and the emergent front reflecting molded surface, and finally is emitted out of the emergent molded surface to the object surface.
8. A stray light shielding structure according to claim 7, wherein:
the multiple reflection profile further comprises:
the first groove is formed in the opposite direction of the light guide structure;
the light supplementing reflection molded surfaces at two sides are formed at the upper and lower parts of the lens mounting through hole and the bottom of a fourth groove formed in the image side end surface of the light guide structure;
the light path also comprises a light source, a light condensing profile, a light splitting reflecting profile, a light supplementing reflecting profile on two sides, an emergent front reflecting profile and an emergent object surface, wherein the light from the illuminator is emitted into the light guide structure through the light condensing profile, and is emitted out of the emergent object surface in sequence.
9. A stray light shielding structure according to claim 8, wherein:
the multiple reflection profile further comprises:
the lens mounting through hole is far away from the far end side of the light-gathering molded surface and an opposite secondary reflection molded surface formed on the outer wall of the light guide structure;
a back-to-back symmetrical reflection molded surface is formed at the bottom of a fifth groove formed in the image side end surface of the light guide structure, and the fifth groove and the third groove are symmetrically arranged relative to the lens mounting through hole;
the light path also comprises a light source, a light guide structure and an opposite secondary reflection profile, wherein the light from the illuminator is emitted into the light guide structure through the light condensation profile, the light emitted to the light guide structure is reflected to the back symmetrical reflection profile through the opposite secondary reflection profile, and finally the light is emitted out of the light emitting profile and is emitted to an object surface.
10. An ultra-micro distance imaging module, characterized in that: the stray light shielding structure of any one of claims 1 to 9, comprising an ultramicro lens and a light guiding structure mounted on a housing, mounted on the light guiding structure.
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|---|---|---|---|
| CN202120053254.5U CN213957668U (en) | 2021-01-08 | 2021-01-08 | Stray light shielding structure and ultramicro-distance imaging module comprising same |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120053254.5U CN213957668U (en) | 2021-01-08 | 2021-01-08 | Stray light shielding structure and ultramicro-distance imaging module comprising same |
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| CN213957668U true CN213957668U (en) | 2021-08-13 |
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| CN202120053254.5U Active CN213957668U (en) | 2021-01-08 | 2021-01-08 | Stray light shielding structure and ultramicro-distance imaging module comprising same |
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| CN (1) | CN213957668U (en) |
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- 2021-01-08 CN CN202120053254.5U patent/CN213957668U/en active Active
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Address after: Room 01, 21st Floor, Building 1, Huigu Space, No. 206 Laowuhuang Road, Guandong Street, Wuhan Donghu New Technology Development Zone, Wuhan City, Hubei Province, 430070 Patentee after: Xiaophoton (Wuhan) Technology Co.,Ltd. Address before: 430074 Hubei Province, Wuhan city Hongshan District Luoyu Road No. 1037 Patentee before: CONVERGENCE TECHNOLOGY Co.,Ltd. |
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