Image sensing device

Abstract

An image sensing device comprises an optical path changing module, a base, a focusing module, a fixing module and a sensing module. The base comprises a first mounting area and a second mounting area, and the first mounting area and the second mounting area are arranged on the upper surface of the base and continuously arranged along an imaging optical axis. The focusing module comprises a plurality of first lenses, a first lens frame and a first driving part, the plurality of first lenses are fixed on the first lens frame, the first lens frame is coupled to the first driving part and is suitable for displacement along the imaging optical axis, and the first driving part is detachably coupled to the first mounting area. The fixing module comprises a plurality of second lenses and a second lens frame, the plurality of second lenses are fixed on the second lens frame, and the second lens frame is detachably coupled to the second mounting area.

Description

Technical Field

[0001] The present disclosure relates to an optical device, and more particularly to an image sensing device comprising multiple lens groups. Background Art

[0002] As mobile phone lens specifications continue to improve and body designs become thinner and lighter, high-end smartphones are increasingly adopting autofocus (AF) lens modules and periscope camera modules to achieve higher-quality photography. However, due to the limited X / Y space available in these modules, they cannot accommodate a wider range of optical image stabilization (OIS) and autofocus components, limiting the development of image stability and focusing performance. Furthermore, mobile phone products, depending on their market positioning, have varying design requirements in terms of form factor, imaging quality, and cost.

[0003] Therefore, a lens module architecture with flexible adjustment capabilities is needed to take into account the diverse requirements of different mobile phone models for performance and structural integration. Summary of the Invention

[0004] In view of the above, the applicant proposes an image sensing device comprising an optical path changing module, a base, a focusing module, a fixing module and a sensing module. The optical path changing module has a light input side and a light output side, and the light output side faces an imaging surface along an imaging optical axis. The base comprises a first mounting area and a second mounting area, which are arranged on the upper surface of the base and are continuously arranged along the imaging optical axis. The focusing module comprises a plurality of first lenses, a first lens frame and a first driving member, the plurality of first lenses are fixed to the first lens frame, the first lens frame is coupled to the first driving member and is suitable for displacement along the imaging optical axis, and the first driving member is detachably coupled to the first mounting area. The fixing module comprises a plurality of second lenses and a second lens frame, the plurality of second lenses are fixed to the second lens frame, and the second lens frame is detachably coupled to the second mounting area. The sensing module is arranged on the imaging surface and fixed to the base.

[0005] In one embodiment, the first mounting area is between the second mounting area and the sensing module, the second lenses are larger than the first lenses, and the sizes of the second lenses and the first lenses decrease sequentially along the imaging optical axis.

[0006] In one embodiment, the first mounting area of ​​the base includes a main latch and a plurality of power supply contacts, the outer side of the first driving member includes a primary latch and the lower surface of the first driving member includes a plurality of power supply contacts, and when the main latch engages the secondary latch, the plurality of power supply contacts are electrically connected to the plurality of power supply contacts.

[0007] In one embodiment, it further includes a replaceable focusing module, including multiple third lenses, a third lens frame and a second driving member, the multiple third lenses are fixed to the third lens frame, the third lens frame is coupled to the second driving member, the outer side of the second driving member includes the secondary latch and the lower surface of the second driving member includes the multiple power contacts, when the main latch engages with the secondary latch of the second driving member, the multiple power supply contacts are electrically connected to the multiple power contacts of the second driving member.

[0008] In one embodiment, a replacement fixing module is further included, including a plurality of fourth lenses and a fourth lens frame, the plurality of fourth lenses are fixed to the fourth lens frame, the second mounting area of ​​the base includes a main fastener, the outer side of the second lens frame and the outer side of the fourth lens frame respectively include a primary fastener, and the main fastener is used to respectively engage the secondary fasteners.

[0009] In one embodiment, the optical path changing module comprises:

[0010] a prism having a reflecting surface;

[0011] a prism frame in the form of a right-angled triangular prism, wherein the reflecting surface of the prism is fixed to the inclined surface of the right-angled triangular prism;

[0012] an L-shaped angle bracket comprising a horizontal plate and a vertical plate, wherein the prism bracket is pivotally connected to the inner surface of the vertical plate via a rotating shaft; and

[0013] A fixing frame, the outer surface of the horizontal plate is pivotally connected to the inner surface of the fixing frame through another rotating shaft, and the fixing frame is fixed to the base.

[0014] In one embodiment, the rotation axis and the other rotation axis are respectively perpendicular to the imaging optical axis.

[0015] In one embodiment, the rotation axis and the other rotation axis are perpendicular to each other.

[0016] In one embodiment, the focusing module further includes a third driving member, the first driving member is coupled to the third driving member and is suitable for moving on a plane perpendicular to the imaging optical axis, and the third driving member is detachably coupled to the first installation area.

[0017] In one embodiment, the fixing module further includes a fourth driving member, the second lens frame is coupled to the fourth driving member and is suitable for moving on a plane perpendicular to the imaging optical axis, and the fourth driving member is detachably coupled to the second installation area. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 FIG. 1 is a side perspective view of an image sensing device according to a first embodiment of the present disclosure.

[0019] Figure 2 FIG. 1 is a schematic diagram of the assembly of a focus module according to some embodiments of the present disclosure.

[0020] Figure 3A is a top view of a base according to some embodiments of the present disclosure.

[0021] Figure 3B FIG. 4 is a partial top view of a first mounting area according to some embodiments of the present disclosure.

[0022] Figure 3C FIG. 4 is a partial side view of a first mounting area according to some embodiments of the present disclosure.

[0023] Figure 4 FIG2 is a schematic diagram of the assembly of a focus module and a replacement focus module according to some embodiments of the present disclosure.

[0024] Figure 5 1 is a schematic diagram of the assembly of a fixing module and a replacement fixing module according to some embodiments of the present disclosure.

[0025] Figure 6 FIG. 1 is a side perspective view of an image sensing device according to a second embodiment of the present disclosure.

[0026] Figure 7 FIG. 4 is a side perspective view of an image sensing device according to a third embodiment of the present disclosure.

[0027] Figure 8 FIG. 4 is a side perspective view of an image sensing device according to a fourth embodiment of the present disclosure.

[0028] Figure 9 FIG. 4 is a side perspective view of an image sensing device according to a fifth embodiment of the present disclosure.

[0029] Figure 10 FIG. 4 is a side perspective view of an image sensing device according to a sixth embodiment of the present disclosure.

[0030] Figure 11 FIG. 4 is a side perspective view of an image sensing device according to a seventh embodiment of the present disclosure.

[0031] Figure 12 FIG. 4 is a side perspective view of an image sensing device according to an eighth embodiment of the present disclosure.

[0032] Figure 13 FIG. 4 is a side perspective view of an image sensing device according to a ninth embodiment of the present disclosure.

[0033] Figure 14 FIG. 1 is a schematic diagram illustrating the focusing state of a lens assembly according to a comparative example of the present disclosure.

[0034] Figure 15Ais a modulation transfer function diagram of a lens assembly at a first focusing position according to a comparative example of the present disclosure.

[0035] Figure 15B is a modulation transfer function diagram of a lens assembly at a second focusing position according to a comparative example of the present disclosure.

[0036] Figure 16 FIG. 4 is a schematic diagram of the focusing state of the image sensing device according to the tenth embodiment of the present disclosure.

[0037] Figure 17A FIG. 4 is a modulation transfer function diagram of the image sensing device at the first focus position according to the tenth embodiment of the present disclosure.

[0038] Figure 17B FIG. 4 is a modulation transfer function diagram of the image sensing device at the second focus position according to the tenth embodiment of the present disclosure.

[0039] Wherein, the reference numerals:

[0040] 10: Image sensing device

[0041] 1: Focus module

[0042] 11: First lens

[0043] 12: First lens frame

[0044] 13: First driving member

[0045] 131: Secondary fastener

[0046] 132: Power contact

[0047] 14: The third driving member

[0048] 15: Hanging Wire

[0049] 16: Magnetic Pole

[0050] 1': Replace the focus module

[0051] 11': Third lens

[0052] 12': Third lens frame

[0053] 13': Second driving member

[0054] 131': Secondary fastener

[0055] 132': Power contact

[0056] 2:Fixed module

[0057] 21: Second lens

[0058] 22: Second lens frame

[0059] 221: Secondary fastener

[0060] 23: Fourth driving member

[0061] 24: Hanging Thread

[0062] 25: Magnetic Pole

[0063] 2': Replace the fixed module

[0064] 21': Fourth lens

[0065] 22': Fourth lens frame

[0066] 221': Secondary fastener

[0067] 3: Optical path changing module

[0068] 31: Prism

[0069] 311: Light incident side

[0070] 312: Reflective surface

[0071] 313: Light output side

[0072] 32: Prism holder

[0073] 33: L-shaped corner bracket

[0074] 331:Horizontal plate

[0075] 332: Vertical board

[0076] 34:Fixed bracket

[0077] 351: First Rotating Shaft

[0078] 352: Second shaft

[0079] 353: The third axis

[0080] 4: Sensing module

[0081] 41:Sensor

[0082] 42: Filter holder

[0083] 43: Filter

[0084] 44:Viscose

[0085] 5: Base

[0086] 51: First installation area

[0087] 511: Main card fastener

[0088] 512: Power supply contact

[0089] 52: Second installation area

[0090] 521: Main card fastener

[0091] 53: The third installation area

[0092] 531: Power supply contact

[0093] 54: Routing

[0094] 9: Lens Group

[0095] D1, D2: diameter

[0096] d1,d2: distance

[0097] G1: First lens group

[0098] G2: Second lens group

[0099] L1, L2, L3, L4, L5: Lenses

[0100] LTO: Imaging Optical Axis

[0101] LT1: Imaging optical axis

[0102] X, Y, Z: Axis DETAILED DESCRIPTION

[0103] In order to make the purpose, means and efficacy of the technical means disclosed in the different embodiments of the present disclosure more understandable, the following description is combined with the drawings to describe in detail the specific embodiments of the proposed technical means. The following descriptions of the technical means recorded in the various embodiments of the present disclosure are only for illustration and are not intended to be representative of all embodiments of the present disclosure, or to limit the present disclosure to specific embodiments. Unless otherwise defined, all technical and technical terms used in the present disclosure have the same meaning as those generally understood by those of ordinary skill in the art to which the present disclosure belongs. The terms used in the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure.

[0104] The terms "vertical", "horizontal", "parallel", "left", "right", "up", "down", "inside", "outside", "front", "back" and similar expressions used in this disclosure are only used to express relative position relationships based on the drawings, and do not limit the components using these terms to be implemented only in the indicated manner. When the absolute position of the object being described changes, the description of the relative position may also change accordingly. The terms "one" or "an" used in this disclosure are used to describe the elements and components of this creation. This term is only for the convenience of description and to give the basic concept of this creation. This description should be understood to include one or at least one, and unless otherwise clearly indicated, the singular also includes the plural. The term "including" is an open-ended term and should be interpreted as "including but not limited to". The term "and / or" used in this disclosure includes any and all combinations of one or more related listed items.

[0105] Figure 1 is a side perspective view of the image sensing device according to the first embodiment of the present disclosure, please refer to Figure 1 . In this embodiment, the image sensing device 10 serves as an independent camera. In other embodiments, the image sensing device 10 serves as an image sensing module of an electronic device, and the electronic device may be, but is not limited to, a mobile phone, a tablet computer, a laptop computer, and a monitor. The image sensing device 10 includes a focusing module 1, a fixing module 2, an optical path changing module 3, a sensing module 4, and a base 5. The focusing module 1, the fixing module 2, the optical path changing module 3, and the sensing module 4 are respectively coupled to the base 5. The coupling is not limited to direct connection or indirect connection, and is not limited to fixed connection or detachable connection. In this embodiment, the optical path changing module 3, the fixing module 2, the focusing module 1, and the sensing module 4 are arranged in sequence along the imaging optical axis LT1.

[0106] The optical path changing module 3 has a light input side 311 and a light output side 313. The light input side 311 is directed toward the target object along the imaging optical axis LTO for imaging, and the light output side 313 is directed toward an imaginary imaging plane along the imaging optical axis LT1. The imaging plane is parallel to the plane formed by the axial X and axial Z axes. The optical path changing module 3 may include a prism 31 or a reflector to change the direction of the incident light. In this embodiment, the optical path changing module 3 includes a prism 31, a prism holder 32, and a fixing holder 34. The prism 31 is in the form of a right-angled triangular prism, and its inclined surface is a reflective surface 312, which is used to change the direction of light incident along the imaging optical axis LTO and reflect the light along the imaging optical axis LT1. In some embodiments, the reflective surface 312 is attached to or coated with a reflective material. The prism holder 32 is in the form of a right-angled triangular prism, and the inclined surface of the prism 31 is attached to and fixed to the inclined surface of the prism holder 32. The right-angled surface of the prism frame 32 is attached to and fixed to the inner surface of the fixing frame 34. The bottom surface of the fixing frame 34 is coupled to the upper surface of the base 5. In some embodiments, the optical path changing module 3 allows the image sensor device 10 to be placed upside down within an electronic device (such as a mobile phone) without having to be arranged along the thickness of the electronic device, thereby significantly reducing the overall thickness of the electronic device.

[0107] The fixing module 2 includes a plurality of second lenses 21 and a second lens frame 22. Each second lens 21 is fixed to the second lens frame 22. Figure 1 As shown, the fixing module 2 of this embodiment includes three second lenses 21. The bottom surface of the second lens holder 22 is coupled to the second mounting area 52 on the upper surface of the base 5. The focusing module 1 includes a plurality of first lenses 11, a first lens holder 12, and a first driver 13. Each first lens 11 is fixed to the first lens holder 12. The focusing module 1 of this embodiment includes two first lenses 11. The first driver 13 is coupled to the first lens holder 12 and is adapted to drive the first lens holder 12. Specifically, the imaging optical axis LT1 passes through the center of the first lens 11 and the second lens 21. The first driver 13 drives the first lens holder 12 to move left and right along the axial direction Y, thereby moving the first lens 11 away from or closer to the second lens 21. The bottom surface of the first driver 13 is coupled to the first mounting area 51 on the upper surface of the base 5. In some embodiments, the image sensing device 10 performs focus adjustment only through the focusing module 1, while the position and focus of the fixing module 2 on the base 5 are fixed. This reduces the size of the image sensing device 10 while achieving optical focus.

[0108] The driver can be, but is not limited to, a voice coil motor (VCM), a shape memory alloy (SMA), a piezoelectric motor (Piezo), or a combination of two or more thereof. Taking a VCM as an example, the number of coils in the VCM can be adjusted according to design requirements, enabling the lens, mirror, or prism 31 driven by the driver to move linearly along the imaging optical axis LT1 for focusing, linearly along a two-dimensional plane perpendicular to the imaging optical axis LT1 for optical image stabilization, or simultaneously linearly along the three axes (X, Y, and Z) for focusing and optical image stabilization. Furthermore, in addition to linear movement along the three axes (X, Y, and Z), the driver can also tilt or rotate the lens, mirror, or prism 31 appropriately to achieve optical axis alignment by varying the drive stroke of the lens, mirror, or prism 31 relative to its two sides.

[0109] The sensing module 4 includes a sensor 41, a filter holder 42, and a filter 43. The filter 43 is coupled to the filter holder 42 and positioned between the sensor 41 and the focusing module 1. The sensor 41 may be, but is not limited to, a charge-coupled device (CCD) or a complementary metal oxide semiconductor (CMOS) active pixel sensor, used to capture images and generate image sensing signals. The sensor 41 has a photosensitive surface disposed in a plane defined by the X and Z axes. In some embodiments, the sensor 41 is electrically connected to the base 5 to receive power and / or transmit image sensing signals. In some embodiments, the bottom surface of the filter holder 42 is fixed to the top surface of the base 5 to stabilize the position of the sensing module 4. In this embodiment, the filter 43 is secured to one side of the focusing module 1 via adhesive 44. This "fixing" refers to the relative position of the two components being fixed after assembly, and is not limited to direct fixing via adhesive, snap fasteners, inserts, or screws. Therefore, in this embodiment, the bottom surface of the filter holder 42 may not be directly fixed to the base 5 , but may be fixed to the base 5 through the focusing module 1 after the focusing module 1 is assembled to the base 5 .

[0110] Figure 2 This is a schematic diagram of the assembly of the focus module according to some embodiments of the present disclosure. Figure 2 . Figure 3A is a top view of a base according to some embodiments of the present disclosure. Figure 3B FIG. 5 is a partial top view of the first mounting area 51 according to some embodiments of the present disclosure. Figure 3C This is a partial side view of the first installation area according to some embodiments of the present disclosure. Please refer to Figure 2 、 Figures 3A to 3C. In this embodiment, the base 5 includes a first mounting area 51, a second mounting area 52 and a third mounting area 53. The first mounting area 51, the second mounting area 52 and the third mounting area 53 are arranged on the upper surface of the base 5 and are arranged continuously along the direction of the imaging optical axis LT1 (i.e., the axial direction Y). Each mounting area does not have to be a range clearly defined on the mechanism, such as a range defined by a line mark or a mechanism intersection line, but may refer to the installation range of each module corresponding to the base 5. Continuous arrangement is not limited to sequential arrangement. For example, the first mounting area 51 of this embodiment is between the second mounting area 52 and the third mounting area 53.

[0111] The first mounting area 51 of the base 5 includes a primary latch 511. The outer side of the first driver 13 of the focus module 1 includes a secondary latch 131. The primary latch 511 engages with the secondary latch 131, securing the focus module 1 to the base 5. In this embodiment, the primary latch 511 is a hook, and the secondary latch 131 is a slot recessed from the outer side of the first driver 13. In other embodiments, the primary latch 511 is a groove recessed from the upper surface of the first mounting area 51 of the base 5, and the secondary latch 131 is a hook. The upper surface of the first mounting area 51 of the base 5 includes multiple power supply contacts 512 and wiring 54. The lower surface of the first driver 13 includes multiple power supply contacts 132. When the primary latch 511 of the base 5 engages the secondary latch 131 of the first driver 13, the multiple power supply contacts 512 are electrically connected to the multiple power supply contacts 132 of the first driver 13.

[0112] For example, Figure 3A The base 5 is a printed circuit board, and the winding layer of the printed circuit board forms two traces 54, and the two conductive pads exposed in the first mounting area 51 of the winding layer form a pair of power supply contacts 512. In addition, the two conductive pads exposed in the third mounting area 53 of the winding layer of this embodiment form a pair of power supply contacts 531; therefore, the four conductive pads formed by the winding layer on the upper surface of the base 5, one pair of which serve as power supply contacts 512 to provide power to the focusing module 1, and the other pair of which serve as power supply contacts 531 to provide power to the sensing module 4. Based on this, the power distribution area and energy-consuming components of the base 5 of this embodiment are concentrated on one side, which is conducive to optimizing heat dissipation for this area. For example, in some embodiments, the back side ( Figure 3C below) and corresponds to Figure 3A The first mounting area 51 and the third mounting area 53 shown may be provided with heat dissipation plates.

[0113] Figure 4 This is a schematic diagram of the assembly of the focus module and the replacement focus module according to some embodiments of the present disclosure. Please refer to Figure 3A and Figure 4In this embodiment, the image sensing device 10 includes a focus module 1, a replaceable focus module 1', a fixing module 2, an optical path changing module 3, a sensing module 4, and a base 5. The focus module 1 and the replaceable focus module 1' can be interchangeably coupled to the first mounting area 51 of the base 5.

[0114] The replaceable focus module 1' includes a plurality of third lenses 11', a third lens frame 12', and a second driver 13'. Each third lens 11' is secured to the third lens frame 12'. The replaceable focus module 1' of this embodiment includes four third lenses 11'. The second driver 13' is coupled to the third lens frame 12' and is adapted to drive the third lens frame 12'.

[0115] The outer side of the second driving member 13' that replaces the focusing module 1' includes a secondary latch 131' that is identical to the secondary latch 131 on the outer side of the first driving member 13. In this embodiment, the secondary latch 131 of the focusing module 1 is a slot recessed from the outer side of the first driving member 13, and the secondary latch 131' of the replacement focusing module 1' is a slot recessed from the outer side of the second driving member 13'. The two slots have the same size specifications to match the main latch 511 of the base 5. In addition, the lower surface of the second driving member 13' includes a plurality of power contacts 132'. When the main latch 511 of the base 5 engages with the secondary latch 131' of the second driving member 13', the plurality of power supply contacts 512 are electrically connected to the plurality of power contacts 132' of the second driving member 13'.

[0116] In this embodiment, the replacement focus module 1' serves as a telephoto lens group and the focus module 1 serves as a short-focus lens group; alternatively, the lower limit distance value of the focus range of the replacement focus module 1' is greater than the lower limit distance value of the focus range of the focus module 1; alternatively, the minimum focus distance (MFD) of the replacement focus module 1' is greater than the minimum focus distance of the focus module 1. Therefore, when the image sensing device 10 needs to change the focus effect, if the focal length range required to meet the imaging requirements exceeds the effective focal length range of the focus module 1, the user can replace the focus module 1 with another suitable replacement focus module 1' to achieve the best focus effect. Alternatively, according to the different positioning of electronic products, the production line can choose to install the focus module 1 or the replacement focus module 1' on the image sensing device 10 to meet different imaging requirements.

[0117] Figure 5 This is a schematic diagram of the assembly of the fixing module and the replacement fixing module according to some embodiments of the present disclosure. Please refer to Figure 3A and Figure 5In this embodiment, the image sensing device 10 includes a focusing module 1, a fixing module 2, an interchangeable fixing module 2', an optical path changing module 3, a sensing module 4, and a base 5. The fixing module 2 and the interchangeable fixing module 2' can be interchangeably coupled to the second mounting area 52 of the base 5.

[0118] The second mounting area 52 of the base 5 includes a primary latch 521. The outer side of the second lens frame 22 of the fixed module 2 includes a secondary latch 221. The primary latch 521 engages with the secondary latch 221, securing the fixed module 2 to the base 5. In this embodiment, the primary latch 521 is a hook, and the secondary latch 221 is a slot recessed from the outer side of the second lens frame 22. In other embodiments, the primary latch 521 is a groove recessed from the upper surface of the second mounting area 52 of the base 5, and the secondary latch 221 is a hook. The replaceable fixed module 2' includes a plurality of fourth lenses 21' and a fourth lens frame 22'. Each fourth lens 21' is secured to a fourth lens frame 22'. In this embodiment, the replaceable fixed module 2' includes three fourth lenses 21'. The outer side of the fourth lens frame 22' of the replaceable fixed module 2' includes a secondary latch 221' identical to the secondary latch 221 on the outer side of the second lens frame 22. In this embodiment, the secondary latch 221 of the fixing module 2 is a slot recessed from the outer side surface of the second lens frame 22, and the secondary latch 221' of the replacement fixing module 2' is a slot recessed from the outer side surface of the fourth lens frame 22', and its size specifications are the same as the slot of the second lens frame 22 to match the main latch 521 of the base 5.

[0119] In this embodiment, the replacement fixed module 2' serves as a telephoto lens assembly and the fixed module 2 serves as a short-focus lens assembly; alternatively, the minimum focus distance (MFD) of the replacement fixed module 2' is greater than the minimum focus distance of the fixed module 2. In some embodiments, the size of each second lens 21 is greater than the size of each first lens 11, and the sizes of all second lenses 21 and all first lenses 11 are sequentially reduced along the imaging optical axis LT1. Therefore, the fixed module 2 and the focusing module 1 can allocate lens pieces or driving components of different sizes, weights, or functions, thereby reducing the energy consumed by the focusing module 1 to drive the first lens 11 for focus adjustment and shortening the travel required to achieve focus.

[0120] Figure 6 is a side perspective view of an image sensing device according to the second embodiment of the present disclosure. Figure 6. In detail, the diameters of the four first lenses 11 of the focusing module 1 of this embodiment decrease in sequence from right to left, so the diameter D1 of the first lens 11 on the far right is the largest; the diameters of the three second lenses 21 of the fixed module 2 decrease in sequence from right to left, so the diameter D2 of the second lens 21 on the far left is the smallest. Therefore, the first lens 11 and the second lens 21 together form an optical system to achieve focusing and imaging of the target object. Among them, the lens piece with a larger weight or size in the optical system is configured as the second lens 21 in the fixed module 2, and the lens piece with a smaller weight or size in the optical system is configured as the first lens 11 in the focusing module 1. In this way, under the premise of achieving the same focusing effect, the first driving member 13 of the image sensing device 10 adopting this configuration bears the lowest load, thereby reducing the energy required to drive the first lens frame 12 and the first lens 11. On the other hand, in this embodiment, the larger second lens element 21 is located closer to the optical path changing module 3 on the imaging optical axis LT1, while the smaller first lens element 11 is located closer to the sensing module 4 on the imaging optical axis LT1. This facilitates the concentration of a wide range of light by the larger diameter second lens element 21, while the smaller first lens element 11 performs fine focusing and aberration correction, and reduces the travel required for the first lens element 11 during focusing (to be described in detail later).

[0121] On the other hand, in some embodiments, the fixing module 2 having the large-sized second lens 21 and the focusing module 1 having the small-sized first lens 11 may also be assigned different functions. Figure 7 is a side perspective view of an image sensing device 10 according to a third embodiment of the present disclosure. Figure 7 Specifically, the configuration of the focusing module 1 of this embodiment is the same as that of the focusing module 1 of the second embodiment, while the fixing module 2 includes a second lens 21, a second lens frame 22, and a fourth driving member 23. The fourth driving member 23 is coupled to the second lens frame 22 and is suitable for driving the second lens frame 22.

[0122] In detail, the fourth driving member 23 of this embodiment has a surface parallel to the plane formed by the axial direction X and the axial direction Z, and the second lens frame 22 is coupled to the surface through the suspension wire 24, so that the movement range of the second lens frame 22 is limited. The suspension wire 24 can be a spring sheet or a linear spring. In addition, the outer side surface of the second lens frame 22 and the inner side surface of the fourth driving member 23 have a pair of magnetic poles 25, so that the second lens frame 22 is suspended between the fourth driving member 23. The magnetic poles 25 can be permanent magnets and / or electromagnets. The fourth driving member 23 drives the second lens frame 22 to move along a two-dimensional plane perpendicular to the axial direction Y (i.e., the plane formed by the axial direction X and the axial direction Z), thereby correcting the offset of the light and realizing optical image stabilization (OIS). The bottom surface of the fourth driving member 23 is coupled to the second mounting area 52 on the upper surface of the base 5. Observe the light along Figure 7 It can be seen from the path of the imaging optical axis LT1 that when the light is focused and reaches the first lens 11, the light path will be gradually compressed, resulting in the light at the rear end of the light path (i.e. Figure 7 The compensation effect of the first lens 11 (on the left side) for image deviation is weakened. In contrast, in this embodiment, the fixed module 2 with a large-diameter second lens 21 realizes the OIS function, so that the second lens 21 only needs a slight offset to offset the slight deviation caused by hand shaking. On the other hand, in this embodiment, the fixed module 2 with OIS function is configured between the optical path changing module 3 and the focusing module 1, so that the light deviating from the imaging optical axis LT1 is first compensated and corrected before focusing adjustment. However, the present disclosure is not limited to this. Under different design considerations, the focusing module 1 can also be configured between the fixed module 2 with OIS function and the optical path changing module 3.

[0123] As mentioned above, the focusing module 1 of the first embodiment is disposed between the fixing module 2 and the sensing module 4 , but the present disclosure is not limited thereto. Figure 8 is a side perspective view of an image sensing device according to a fourth embodiment of the present disclosure. Figure 8 In this embodiment, the first mounting area 51, the second mounting area 52, and the third mounting area 53 are arranged continuously and sequentially. Therefore, the fixing module 2 is disposed between the focusing module 1 and the sensing module 4. In addition, the focusing module 1 of this embodiment includes a first lens 11, a first lens frame 12, a first driving member 13, and a third driving member 14. The first driving member 13 is coupled to the first lens frame 12 and is suitable for driving the first lens frame 12. The third driving member 14 is coupled to the first driving member 13 and is suitable for driving the first driving member 13 and the first lens frame 12.

[0124] Specifically, the third driver 14 of this embodiment has a surface parallel to the plane defined by the X and Z axes. The first driver 13 is coupled to this surface via suspension wires 15. Furthermore, pairs of magnetic poles 16 are formed on the outer side of the first driver 13 and the inner side of the third driver 14, suspending the first driver 13 and the first lens holder 12 between the third driver 14. The first driver 13 drives the first lens holder 12 along the Y axis to achieve optical focusing. Simultaneously, the third driver 14 drives the first lens holder 12 along a two-dimensional plane perpendicular to the Y axis (i.e., the plane defined by the X and Z axes) to achieve optical image stabilization. The bottom surface of the third driver 14 is coupled to the first mounting area 51 on the upper surface of the base 5. In this embodiment, a lens with a relatively small weight and size is used as the first lens 11 in the focus module 1 to reduce the load on the first and third drivers 13, 14. Furthermore, the power supply is centralized in the focus module 1, facilitating wiring and heat dissipation design. Therefore, as in the third embodiment (refer to Figure 7 ) and the fourth embodiment (refer to Figure 8 ), based on different design considerations, the image sensing device 10 can be configured with different types of focus modules 1 and / or fixed modules 2, and the positions of the focus modules 1 and fixed modules 2 on the base 5 can also be adjusted according to design requirements. For example, in this embodiment, the focus module 1 with OIS function is positioned between the optical path changing module 3 and the fixed module 2; in other embodiments, the fixed module 2 is positioned between the focus module 1 with OIS function and the optical path changing module 3.

[0125] Figure 9 is a side perspective view of an image sensing device according to the fifth embodiment of the present disclosure. Figure 9 This embodiment is similar to the third embodiment (see Figure 7 ) is the configuration of the optical path changing module 3. In this embodiment, the optical path changing module 3 and the fixing module 2 are integrated into a single module and are installed together in the second installation area 52 of the base 5. In other embodiments, in the fourth embodiment (refer to Figure 8 ), the optical path changing module 3 can also be integrated with the focusing module 1 into a single module, and installed together in the first installation area 51 of the base 5 (not shown).

[0126] Figure 10 is a side perspective view of an image sensing device according to the sixth embodiment of the present disclosure. Figure 10. In this embodiment, the optical path changing module 3 includes a prism 31, a prism frame 32 and a first rotating shaft 351. The first rotating shaft 351 extends along the axial direction X, and the prism 31 is pivotally connected to the prism frame 32 through the first rotating shaft 351. In this embodiment, a driving member (not shown) can drive the prism 31 to rotate around the axial direction X on the plane formed by the axial direction Y and the axial direction Z to correct the imaging deviation. In some embodiments, the driving member is a motor coupled to one end of the first rotating shaft 351 to drive the first rotating shaft 351 to rotate and drive the prism 31 fixed to the first rotating shaft 351; or, the driving member is a motor coupled to the side of the prism 31 to drive the prism 31 to rotate around the first rotating shaft 351.

[0127] Specifically, light is incident along the imaging optical axis LTO, reflected by the prism 31, and directed toward the sensor 41 along the imaging optical axis LT1. When the image sensing device 10 vibrates along the axial Y direction, the reflected light projected onto the sensor 41 will deviate in the axial Z direction. At this point, the driver drives the prism 31 to rotate clockwise to offset the negative deviation of the reflected light in the axial Z direction; alternatively, the driver drives the prism 31 to rotate counterclockwise to offset the positive deviation of the reflected light in the axial Z direction. In other embodiments, the first rotation axis 351 can also be perpendicular to the axial X direction, pivotally connecting the prism 31 to the prism holder 32. In this case, the driver can drive the prism 31 to rotate about a rotation axis parallel to the surface of the prism holder 32 (located in the plane formed by the axial Y and axial Z directions) to correct the imaging deviation in the axial X direction. In this embodiment, the optical path altering module 3 is the first optical module through which light enters the image sensor device 10. Through the driver and first rotating shaft 351, it corrects light that deviates from the imaging optical axis LT1 at the front stage of the optical system. This prevents image blur caused by partial light being blocked by the lens edges. This increases the flexibility in the configuration of the focus module 1 and the fixing module 2 in the rear stage of the optical system, eliminating the need to consider light blocking by the edges of the first lens 11 or the second lens 21. For example, the rightmost side of the image sensor device 10 can be equipped with a second lens 21 with a small diameter D2.

[0128] In some embodiments, the optical path changing module 3 and the focusing module 1 can correct imaging deviations in different axes. Figure 10 As shown, the driving element of the optical path changing module 3 drives the prism 31 to rotate about the axis X to correct the imaging deviation in the axis Z, and the third driving element 14 of the focusing module 1 drives the first lens 11 to translate along the axis X to correct the imaging deviation in the axis X. In other embodiments, the fixing module 2 is equipped with a fourth driving element 23 to drive the second lens 21 to implement the OIS function, and the optical path changing module 3 and the fixing module 2 can correct for imaging deviations in different axes.

[0129] For example, the driver of the optical path changing module 3 drives the prism 31 to rotate about the axis X to correct for imaging deviations along the axis Z, while the fourth driver 23 of the fixed module 2 drives the second lens 21 to translate along the axis X to correct for imaging deviations along the axis X. Thus, light rays that deviate from the imaging optical axis LT1 can be compensated and corrected by the optical path changing module 3 and the fixed module 2 at the front stage of the optical system before focus adjustment. However, the present disclosure is not limited to this. Under different design considerations, the focusing module 1 can also be disposed between the fixed module 2 with OIS function and the optical path changing module 3 with OIS function.

[0130] Figure 11 is a side perspective view of an image sensing device according to the seventh embodiment of the present disclosure. Figure 11 In this embodiment, the optical path changing module 3 includes a prism 31, a prism holder 32, and a pair of first rotating shafts 351. One of the first rotating shafts 351 extends along the axial direction X, while the other first rotating shaft 351 is perpendicular to the axial direction X. The prism 31 is pivotally connected to the prism holder 32 via the pair of first rotating shafts 351. Therefore, the optical path changing module 3 can simultaneously correct imaging deviations along different axial directions.

[0131] Figure 12 is a side perspective view of an image sensing device according to the eighth embodiment of the present disclosure. Figure 12 . In this embodiment, the optical path changing module 3 includes a prism 31, a prism frame 32, an L-shaped angle frame 33, a fixing frame 34, a second rotating shaft 352 and a third rotating shaft 353. The reflecting surface 312 of the prism 31 is fixed to the prism frame 32. The prism frame 32 is pivoted to the inner surface of the vertical plate 332 of the L-shaped angle frame 33 through the second rotating shaft 352. The horizontal plate 331 of the L-shaped angle frame 33 is pivoted to the inner surface of the fixing frame 34 through the third rotating shaft 353. The fixing frame 34 is fixed to the base 5. The second rotating shaft 352 and the third rotating shaft 353 of this embodiment are both parallel to the axial direction X to correct the imaging deviation in the axial direction Z. Therefore, the second rotating shaft 352 and the third rotating shaft 353 can each adopt a smaller rotation stroke to achieve deviation correction, which allows the optical path changing module 3 to generate deflection more quickly to offset high-frequency jitter. In addition, the distance between the L-shaped angle frame 33 and the fixing frame 34 can be shortened, thereby reducing the volume of the optical path changing module 3.

[0132] Figure 13 is a side perspective view of an image sensing device according to the ninth embodiment of the present disclosure. Figure 13 This embodiment is similar to the eighth embodiment (see Figure 12) is the second rotation axis 352. In this embodiment, the second rotation axis 352 is parallel to the axis Z to correct imaging deviation in the axis X; the third rotation axis 353 is parallel to the axis X to correct imaging deviation in the axis Z. Therefore, the optical path changing module 3 can simultaneously correct imaging deviations in different axes. In Examples 6 to 9, the fixing module 2 is configured between the optical path changing module 3 with OIS function and the focusing module 1; in other embodiments, the focusing module 1 is configured between the optical path changing module 3 with OIS function and the fixing module 2.

[0133] Figure 14 This is a schematic diagram of the focusing state of the lens assembly according to the comparative example of this disclosure. Figure 14 . In this comparative example, the lens group 9 includes a concave-convex lens L1, a convex-concave lens L2, a concave-convex lens L3, a plano-concave lens L4 and a plano-convex lens L5. Among them, the effective focal length (Effective Focal Length, EFL) of each lens L1, L2, L3, L4, L5 is 9.160mm, -15.051mm, 19.136mm, -10.454mm, 472.148mm, respectively. Table 1 is the lens parameters of the lens group 9 according to the comparative example disclosed in this disclosure, and Table 2 is the spherical coefficient of each lens surface according to the comparative example disclosed in this disclosure. Please refer to Table 1 and Table 2 together. When the light enters the lens group 9, it passes through the concave-convex lens L1, the convex-concave lens L2, the concave-convex lens L3, the plano-concave lens L4, the plano-convex lens L5 and the infrared filter in sequence and reaches the imaging surface. Among them, the left side of each lens L1, L2, L3, L4, L5 is the incident surface, and the right side is the exit surface. The component pitch is the distance between a specific surface and the next surface. For example, the distance between the incident surface and the exit surface of the meniscus lens L1 is 2.153 mm, and the distance between the exit surface of the meniscus lens L1 and the incident surface of the meniscus lens L2 is 0.147 mm.

[0134] Table 1. Lens parameters of lens set 9 according to the comparative example of the present disclosure

[0135]

[0136] Note: The unit of curvature radius is (mm), the unit of component spacing is (mm), for Figure 14 Above and Figure 16 , d1 is 0mm; for Figure 14 In the figure below, d1 is 5.825mm.

[0137] Table 2. Spherical coefficients of lens surfaces according to comparative examples of the present disclosure

[0138]

[0139]

[0140] Note: k: Conic constant; A4~A20: Aspheric coefficients.

[0141] In this comparative example, the lens group 9 can move left and right within a range of a moving distance d1 to achieve optical focusing. Figure 15A is a modulation transfer function diagram of a lens assembly at a first focusing position according to a comparative example of the present disclosure. Figure 15B This is a diagram of the modulation transfer function of the lens assembly at the second focus position according to the comparative example of the present disclosure. Please refer to Figure 14 、 Figure 15A and Figure 15B . Figure 15A and Figure 15B The horizontal axis is the spatial frequency (cycles / mm); the vertical axis is the optical transfer function coefficient (Modulation Transfer Function, MTF). Figure 14 The upper lens group 9 corresponds to the first focus position, at which the target object is located at infinity; Figure 14 The lower lens group 9 corresponds to the second focus position, where the target object is located 100 mm in front of (to the left of) the lens group. In this comparative example, when the target object moves from infinity to 100 mm, the focus movement distance d1 of the lens group 9 is 5.825 mm.

[0142] Figure 15A and Figure 15B Different curves are used to represent the modulation transfer functions of light rays at different object heights (0.0000mm, 2.1504mm, 2.8672mm, 3.5840mm) at the tangential focal plane and the sagittal focal plane. The modulation transfer functions represent the contrast preservation capability of lens group 9 at different spatial frequencies. The MTF values ​​of each curve decrease as the spatial frequency increases. Figure 15A As shown in FIG. 9 , the MTF of lens group 9 for images at the meridian focal plane and sagittal focal plane with an object height above 3.5840 mm decreases slowly, and drops below 0.8 after a spatial frequency of 50 cycles / mm. Figure 15BAs shown, for images in the meridional focal plane at object heights above 2.8672mm, the MTF of lens group 9 rapidly drops below 0.2 at spatial frequencies below 12.5 cycles / mm. For images in the sagittal focal plane at object heights above 3.5840mm, the MTF rapidly drops below 0.2 at spatial frequencies below 25.0 cycles / mm. In other words, when the target object approaches lens group 9, lens group 9 must move a distance d1 (5.825mm) to achieve focus, but the imaging quality is still severely degraded.

[0143] Figure 16 FIG. 1 is a schematic diagram of the focusing state of the image sensing device according to the tenth embodiment of the present disclosure. Figure 16 In this embodiment, the image sensing device 10 includes a first lens group G1 and a second lens group G2. The first lens group G1 of this embodiment is the first lens 11 of the focusing module 1, and the second lens group G2 of this embodiment is the second lens 21 of the fixing module 2. The first lens group G1 includes a plano-concave lens L4 and a plano-convex lens L5, and the second lens group G2 includes a meniscus lens L1, a meniscus lens L2, and a meniscus lens L3. To facilitate comparison of imaging effects, the effective focal lengths and other lens parameters of each lens L1, L2, L3, L4, and L5 of this embodiment (see Tables 1 and 2) are the same as those of the comparative example. In addition, the effective focal length of the first lens group G1 is 11.086 mm, and the effective focal length of the second lens group G2 is -10.497 mm.

[0144] In this embodiment, the first lens group G1 can move left and right within a range of a moving distance d2 to achieve optical focus. Figure 17A FIG. 4 is a modulation transfer function diagram of the image sensing device at the first focus position according to the tenth embodiment of the present disclosure. Figure 17B is a modulation transfer function diagram of the image sensing device at the second focus position according to the tenth embodiment of the present disclosure. Figure 16 、 Figure 17A and Figure 17B . Figure 16 The upper image sensing device 10 corresponds to the first focus position, where the target object is located at infinity; Figure 16 The image sensor device 10 at the bottom corresponds to the second focus position, where the target object is located 100 mm in front of (to the left of) the lens assembly. In this embodiment, when the target object moves from infinity to 100 mm, the focus movement distance d2 of the image sensor device 10 is 2.105 mm.

[0145] same Figure 15A and Figure 15B , Figure 17A and Figure 17BDifferent curves are used to show the modulation transfer functions of light at different object heights (0.0000mm, 2.1504mm, 2.8672mm, 3.5840mm) on the image displayed on the imaging surface at the tangential focal plane and the sagittal focal plane. Figure 17A As shown, the MTF of the image sensor device 10 for images at the meridional and sagittal focal planes with an object height above 3.5840 mm slowly decreases, and drops below 0.8 after a spatial frequency of 50 cycles / mm. Its imaging performance is close to that of the comparative lens set 9. However, as Figure 17B As shown, the image sensing device 10 for images of the meridian focal plane with an object height of more than 2.1504mm, its MTF slowly drops to below 0.8 after a spatial frequency of 37.5 cycles / mm; the image sensing device 10 for images of the sagittal focal plane with an object height of more than 2.1504mm, its MTF slowly drops to below 0.8 after a spatial frequency of 75.0 cycles / mm. Therefore, compared with the focusing distance d1 (5.825mm) of the comparative example, the first lens group G1 of this embodiment only needs to move a distance d2 (2.105mm) to achieve focusing. By reducing the distance that the focusing module 1 needs to move during the focusing process, the overall volume and weight of the image sensing device 10 can be effectively reduced. In addition, as Figure 15B and Figure 17B As shown, the image sensing device 10 has a better ability to preserve image contrast at different spatial frequencies than the lens group 9 through the cooperation of the first lens group G1 (focusing module 1) and the second lens group G2 (fixing module 2).

[0146] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art may make various corresponding changes and modifications based on the present invention, but these corresponding changes and modifications should all fall within the scope of protection of the claims of the present invention.

Claims

1. An image sensing device, characterized in that: Include: An optical path changing module having a light entrance side and a light exit side, the light exit side being directed toward an imaging surface along an imaging optical axis; A base, comprising a first mounting area and a second mounting area, disposed on an upper surface of the base and arranged continuously along the imaging optical axis; A focusing module comprising a plurality of first lenses, a first lens frame, and a first driving member, wherein the plurality of first lenses are fixed to the first lens frame, the first lens frame is coupled to the first driving member and is adapted to be displaced along the imaging optical axis, and the first driving member is detachably coupled to the first mounting area; a fixing module comprising a plurality of second lenses and a second lens frame, wherein the plurality of second lenses are fixed to the second lens frame, and the second lens frame is detachably coupled to the second mounting area; and A sensing module is disposed on the imaging surface and fixed to the base.

2. The image sensing device according to claim 1, wherein: The first installation area is between the second installation area and the sensing module. The sizes of the second lenses are larger than those of the first lenses. The sizes of the second lenses and the first lenses decrease in sequence along the imaging optical axis.

3. The image sensing device according to claim 1, wherein: The first mounting area of ​​the base includes a main latch and multiple power supply contacts. The outer side of the first driving member includes a primary latch and the lower surface of the first driving member includes multiple power supply contacts. When the main latch engages with the secondary latch, the multiple power supply contacts are electrically connected to the multiple power supply contacts.

4. The image sensing device as described in claim 3 further includes a replaceable focusing module, including a plurality of third lenses, a third lens frame and a second driving member, the plurality of third lenses are fixed to the third lens frame, the third lens frame is coupled to the second driving member, the outer side of the second driving member includes the secondary latch and the lower surface of the second driving member includes the plurality of power supply contacts, when the main latch engages with the secondary latch of the second driving member, the plurality of power supply contacts are electrically connected to the plurality of power supply contacts of the second driving member.

5. The image sensing device as described in claim 1 further includes a replacement fixing module, including a plurality of fourth lenses and a fourth lens frame, the plurality of fourth lenses are fixed to the fourth lens frame, the second mounting area of ​​the base includes a main fastener, the outer side of the second lens frame and the outer side of the fourth lens frame respectively include a primary fastener, the main fastener is used to respectively engage the plurality of secondary fasteners.

6. The image sensing device according to claim 1, wherein: The optical path changing module includes: a prism having a reflecting surface; a prism frame in the form of a right-angled triangular prism, wherein the reflecting surface of the prism is fixed to the inclined surface of the right-angled triangular prism; an L-shaped angle bracket comprising a horizontal plate and a vertical plate, wherein the prism bracket is pivotally connected to the inner surface of the vertical plate via a rotating shaft; and A fixing frame, the outer surface of the horizontal plate is pivotally connected to the inner surface of the fixing frame through another rotating shaft, and the fixing frame is fixed to the base.

7. The image sensing device according to claim 6, wherein: The rotation axis and the other rotation axis are respectively perpendicular to the imaging optical axis.

8. The image sensing device according to claim 7, wherein: The rotating shaft and the other rotating shaft are perpendicular to each other.

9. The image sensing device according to claim 1, wherein: The focusing module further includes a third driving member. The first driving member is coupled to the third driving member and is suitable for moving on a plane perpendicular to the imaging optical axis. The third driving member is detachably coupled to the first installation area.

10. The image sensing device according to claim 1, wherein: The fixing module further includes a fourth driving member. The second lens frame is coupled to the fourth driving member and is suitable for moving on a plane perpendicular to the imaging optical axis. The fourth driving member is detachably coupled to the second installation area.

Images