Abstract:
A pyramidal microlens for observing hole wall structure and a camera lens structure using the microlens constructed by a cone and a hemisphere formed at the root of the cone, the tip part of which is placed into the observed hole wall, such that a user&#39;s naked eye may approach the hemispherical surface to observe a locally enlarging image of the inner surface of the hole wall, in addition, the lens being able to be placed longitudinally in a hollow lens tube, which may be placed on a surface, such that the lens may be used at any surface.

Description:
BACKGROUND OF THE INVENTION 
       [0001]    1. Field of the Invention 
         [0002]    The present invention generally relates to a lens, in particular, to a microlens having magnifying function. 
         [0003]    2. Description of Prior Art 
         [0004]    Under the lead of a thriving technical industry, it is able to establish a substantially solid experience and technique for semiconductor in terms of design, simulation, process, packaging, and test, which have a significant advantage for developing MEMS (micro-electro-mechanical system) hereafter. Nowadays, the development of each electronic product has a trend in pursuing the goals of lightness, thinness, shortness, and smallness, so there is an amazing speed in changing the outlook of many electronic products, for example, the design of electronic hardware, computer or microprocessor. 
         [0005]    To cope with the developing direction of electronic product in the designing trends of lightness, thinness, shortness, and smallness, the size of each electronic element is continuously microminiaturized. So far, the size of electronic element has broken the limitation that may be directly observed by human naked eye, even a deep-submicron state having reached already. 
         [0006]    Based upon the microminiaturizing development of element size, a totally different difficulty is further emerging on the integrating level of microstructure. Since element size is moved toward a standard beyond the level of deep-submicron, even aerosol particle easily ignored in the past will become a critical factor in today by influencing the element yield. Later on, in order to promote the element yield, clean room is established to remove the influence of this impurity in the air, thereby the aforementioned influence being effectively improved and removed. 
         [0007]    Although the establish of aforementioned clean room has removed the influence of the aerosol particle in the air to effectively promote element yield, however, the influence of yield not only comes from the impurity in air, but also originates from the process of facilities and elements themselves. In a clean room, each facility has its own usage lifetime, so before the usage lifetime it will be worn out to generate fissure, which easily releases micro-particle formed as dust that is unable to be observed by human naked eye. If dust invades element itself during process, for example, invading into a hole wall of a circuit board, then it is difficult to find out an occurrence of a defect during element integration. Furthermore, during a processing procedure of PCB (printed circuit board), a through hole on the PCB is acted as a pathway for an electric connection between copper foils arranged on two plates&#39; surfaces. Wherein, conductive metal is plated on the inner surface of the hole wall of the through hole in a way, such that an electric connection is created between the copper foils arranged on the two plates&#39; surfaces. If it is impossible to connect the conductive metal plated on the internal surface of the through hole, then it will directly influence the electric connection between two plates of the PCB. 
         [0008]    Currently, although micro-technique has developed into an observing dimension above nano-level because of the need of technology, a solution for above problem has not yet developed. In other words, a defect of an electronic product still can not be detected immediately following the movement of an inspector, which becomes a problem needed to be solved urgently by current electronic industry during the effort to pursue high yield and high efficiency. 
       SUMMARY OF THE INVENTION 
       [0009]    The invention is mainly to provide a pyramidal microlens capable of observing microstructure instantly and a camera lens structure using the microlens. Product yield and working efficiency can be maintained by designing the microlens structure with magnification, which can inspect microstructure instantly. In addition, an image recording device is coped to simultaneously shoot the image, thereby, the yield and the working efficiency being maintained. 
         [0010]    The invention is to provide a pyramidal microlens and a camera lens structure using the microlens. The pyramidal microlens is capable of observing a hole wall structure and is constructed of a cone and a hemisphere. The tip part of the cone has a plane, while the hemisphere is arranged at the root of the cone. The top side of the hemisphere has a transparent face. Light beam, entering the lens through the cone, is reflected several times in the lens to generate dispersion, later on, the dispersed light penetrating through the transparent face to form a magnified image on the user&#39;s retina or on an image recording device, thereby, the user being able to observe the corresponding microstructure instantly through the lens. 
     
    
     
       BRIEF DESCRIPTION OF DRAWING 
         [0011]    The features of the invention believed to be novel are set forth with particularity in the appended claims. The invention itself, however, may be best understood by reference to the following detailed description of the invention, which describes a number of exemplary embodiments of the invention, taken in conjunction with the accompanying drawings, in which: 
           [0012]      FIG. 1  is a perspective, structural view of a microlens of the present invention; 
           [0013]      FIG. 2  is a perspective, structural view of a microlens according to the first embodiment of the present invention; 
           [0014]      FIG. 3  is a perspective, structural view of a microlens according to the second embodiment of the present invention; 
           [0015]      FIG. 4  is an operational, sectional illustration of the present invention; 
           [0016]      FIG. 5  is a perspective, assembled view illustrating the imaging principle of the present invention; 
           [0017]      FIG. 6  is a perspective, sectional view illustrating the imaging process of the present invention; 
           [0018]      FIG. 7  is a perspective view explosively illustrating the structure of a camera lens of the present invention; 
           [0019]      FIG. 8  is a perspective, assembled illustration of a camera lens of the present invention; and 
           [0020]      FIG. 9  is an operational, sectional view of a camera lens of the present invention. 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0021]    In cooperation with attached drawings, the technical contents and detailed description of the present invention are described thereinafter according to a number of preferable embodiments, being not used to limit its executing scope. Any equivalent variation and modification made according to appended claims is all covered by the claims claimed by the present invention. 
         [0022]    Please refer to  FIG. 1  to  FIG. 3 , which respectively are a perspective, structural view of a microlens of the present invention, a perspective, structural view of a microlens according to the first embodiment of the present invention, and a perspective, structural view of a microlens according to the second embodiment of the present invention. As shown in these figures, the microlens  1  of the invention has a cone  11  and a hemisphere  12 , wherein the cone  11  is located under the microlens  1 . In this case, the cone  11  of the microlens  1  is a tetrahedron, the tip part of which has a plane  111  in corresponding to an object to be observed (not shown in the figures, and which will be explained later) in a way, such that the light, reflected or refracted from the observed object, may enter the microlens  1  through the bottom side and the circumferential sides of the cone  11 . The light penetrates through the hemisphere  12  of the microlens  1 , after being reflected many times in the cone  11  of the microlens  1 . Furthermore, the hemisphere  1  of the microlens  1  is located at the root of the cone  11  and has a transparent face  121  at the top side thereof. The outer appearance of the transparent face  121  is shown as an arc-curved face, which may be a spherical face or a non-spherical face. In this case, the transparent face  121  is a spherical face, the area of which is substantially larger than that of the plane  111 . Thereby, the light, reflected many times, penetrates through the transparent face  12  to generate a dispersing phenomenon, making a user received the emitting-out light, which finally is formed an enlarging image on the user&#39;s retina to facilitate the user in observing the microstructure of the observed object. 
         [0023]    Continuously, please refer to  FIG. 2 , which is a perspective, structural view of the first embodiment of the present invention. As shown in this figure, the bottom side of a hemisphere  12  of a microlens  12  in this case is extended outwardly in radial direction in a way, such that the outer diameter of the bottom face of the hemisphere  12  is larger than that of the root of the cone  11 . The transparent face  121  at the top side is shown as a non-spherical shape. In addition, except as a tetrahedron, the cone  11  of the microlens  11  may also be shown as a circular cone, as shown in  FIG. 3 . 
         [0024]    Please refer to  FIG. 4  to  FIG. 6 , which respectively are an operational, sectional illustration, an imaging principle view, and an imaging illustration of the present invention. As shown in these figures, when a user is intended to use the microlens  1  to observe a microstructure, for example, a through hole  31  of a PCB  3  in this embodiment, the cone  11  of the microlens  1  is extended into the through hole  31  to observe the completeness of the conductive metal layer  4  plated on the inner surface of the through hole  31  and to ensure that the conductive, metallic layer  4  is connected to the copper foil layers  5  respectively arranged on the two plates&#39; surfaces. The light reflected or refracted from the conductive, metallic layer  4  in the through hoe  31  enters the microlens  1  through the bottom face and the circumferential faces of the cone  11 . After a plurality of reflecting operations, as simulated by the light reflecting paths in  FIG. 5 , the light penetrates through the transparent face  121 , as indicated by the arrows in the figure, making light generate dispersing operation to have an image-magnifying effect. 
         [0025]    Therefore, when the user receives the light emitting out the lens  1  through the transparent face  121 , a locally enlarged image of the conductive, metallic layer  4  in the through hole  31  is formed on the retina of the user, as shown by the imaging illustration in  FIG. 6 . Since the cone  11  is a tetrahedron, the final image observed by the user is divided into four different blocks. Besides, since of the differences of the paths and the times of light reflection, except for the imaging zone a indicated in  FIG. 5  and  FIG. 6 , where the image is identical to the observed object, because the bottom face  111  of the cone  11  corresponds the position of the through hole  31  exactly to that of the axial center, the internal images, of the through hole  31 , at outer surrounding of the axial center is shown an upside down and reverse relationship for both of the enlarged image and the real appearance of the conductive, metallic layer  4 , as indicated by the imaging zones b or c of  FIG. 5  and  FIG. 6 . 
         [0026]    Please refer to  FIG. 7  and  FIG. 8 , which respectively are a structurally perspective, explosive view and an assembled illustration of a camera lens of the present invention. As shown in these two figures, the camera lens  10  mainly includes a microlens  1  and a lens tube  2 , wherein the microlens  1  is accommodated in the lens tube  2 . In this case, the cone  11  of the microlens  1  is a tetrahedron. The lens tube  2  further includes an upper lens tube  21 , a lower lens tube  22  and a supporting seat  23 , wherein the upper lens tube  21  is fitted correspondingly with the lower lens tube  22 . The top side of the upper lens tube  21  has a viewing opening  211 , while the bottom side of the lower lens tube  22  has an objective opening  221  corresponding to the viewing opening  211 . In addition, the supporting seat  23  is a circular plate arranged in the lens tube  2 . The circumference of the lower side of the supporting seat  23  is attached to the upper circumference of the lower lens tube  22 , as shown in  FIG. 6 . A through hole  231  is arranged at an axially central position of the supporting seat  23  for the cone  11  on the microlens  1  to be arranged through, making the bottom of the hemisphere of the microlens  1  be able to be abutted against the upper side of the supporting seat  23 , thereby, the cone  11  being suspended in the lower lens tube  22 . In the meantime, the plane  111  of the cone  11  is parallel to the objective opening  221 , as shown by the operational, sectional view of  FIG. 9 . At last, after the upper lens tube  21  has been interconnected to the lower lens tube  22 , the inner edge of the top part of the upper lens tube  21  may just be abutted against the circumferences of the supporting seat  23  and the hemisphere  12  for securing the supporting seat  23  and the microlens  1 , in the meantime, making the transparent face  121  at the top of microlens  1  in line with the viewing opening  211  of the upper lens tube  21 . The assembled, structural view is shown in  FIG. 8 . 
         [0027]    Please refer to  FIG. 9 , which is an operational, sectional view of a microlens of the present invention. As shown in this figure, the microlens  1  is accommodated in the lens tube  2 , making the microlens  1  generate a suspending operation and making the viewing opening  211  arranged on the lens tube  2  abutted on the plane and corresponded to an observing position, while the microlens  1  may be used at any position. As shown by the plane plate  6  in the figure, a user may inspect any micro fissure possibly emerging on the plate  6  by means of the objective opening  221  on the lens tube  2  and through the microlens  1 , thereby, a problem being able to be detected instantly. In addition, the camera lens  10  may be assembled together with an image recording device, for example, a digital camera, which may directly shoot the image shown by the lens for facilitating a recording purpose. 
         [0028]    However, the aforementioned description is only a preferable embodiment according to the present invention, being not used to limit the patent scope of the invention, so equivalently structural variation made to the contents of the present invention, for example, description and drawings, is all covered by the claims claimed thereinafter.