US20160033740A1 - Optical lens system - Google Patents
Optical lens system Download PDFInfo
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- US20160033740A1 US20160033740A1 US14/448,633 US201414448633A US2016033740A1 US 20160033740 A1 US20160033740 A1 US 20160033740A1 US 201414448633 A US201414448633 A US 201414448633A US 2016033740 A1 US2016033740 A1 US 2016033740A1
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- Prior art keywords
- fitting
- lens element
- optical lens
- lens assembly
- fitting structure
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/02—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of crystals, e.g. rock-salt, semi-conductors
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/021—Mountings, adjusting means, or light-tight connections, for optical elements for lenses for more than one lens
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/022—Mountings, adjusting means, or light-tight connections, for optical elements for lenses lens and mount having complementary engagement means, e.g. screw/thread
Definitions
- the present disclosure relates to optical lens systems, and more particularly to an optical lens assembly having a first lens element made of a sapphire glass and an electronic device including the optical lens assembly.
- optical imaging systems are commonly incorporated in personal electronic devices such as mobile phones, tablet computers, and the like.
- the optical imaging systems include an image sensor responsive to incident light and lens elements to direct and focus light onto the image sensor so as to form an image of an object external to the device in which the optical imaging system is incorporated.
- Such optical imaging systems can include multiple lens elements, and a lens barrel can be provided to hold the lens elements in alignment with each other along an optical axis.
- an imaging sensor such as a charge coupled device (CCD) or a CMOS image sensor.
- the present disclosure relates to optical lens assemblies, and more particularly to an optical lens assembly with the first lens element on the object side having a high refractive index and being extremely scratch-resistant.
- Certain embodiments of the present invention relate to an optical lens system that can be used in a portable electronic device (e.g., a camera in a cellular phone). Portions of the optical lens system include an optical lens assembly. According to certain embodiments of the present invention, the optical lens assembly may include two or more optical lens elements.
- an optical lens assembly may include lens elements aligned along an optical axis.
- a first lens element has a planar object-side surface and a first fitting structure disposed on a periphery of an image-side surface.
- a second lens element has a second fitting structure disposed on a circumferential periphery of an object-side surface. The first and second fitting structures are fittedly engaged with each other.
- the first lens element has a refractive index greater than 1.6 and is made of a sapphire glass.
- the first fitting structure may be an annular-shaped (ring-shaped) groove having a V shape
- the second fitting structure may be an annular-shaped protrusion having an inverted-V shape
- the first fitting structure may be an annular-shaped protrusion having an inverted-V shape
- the second fitting structure may be an annular-shaped groove having a V shape.
- the annular protrusion may have a flat top surface or a rounded top surface.
- the first fitting structure may have multiple first fitting members disposed in a regular or irregular pattern along the periphery of the image-side surface of the first lens element, and each of the first fitting member is a groove having a conical shape.
- the second fitting structure may have multiple second fitting members disposed in a matching position in relation to the location of the first fitting members. Each of the second fitting members can be a protruding cone that fittedly engages with a corresponding conical groove.
- the first fitting structure may have multiple first fitting members disposed in a regular or irregular pattern along the periphery of the image-side surface of the first lens element.
- Each of the first fitting members can be a protruding cone having a base at the image-side surface and an apex protruding toward the object-side surface of the second lens element.
- the second fitting structure may have multiple second fitting members disposed in a matching position in relation to the location of the first fitting members.
- Each of the second fitting members can be a groove having a conical shape for receiving a corresponding protruding cone.
- Embodiments of the present invention can provide a simplification and improvement in the design and fabrication of the optical lens system that can further reduce the length or thickness of the optical lens assembly.
- FIG. 1 is a simplified cross-sectional view of a camera assembly.
- FIG. 2 is a simplified cross-sectional view of an optical lens system according to an embodiment of the present invention.
- FIG. 3 is a perspective view of an exemplary optical lens assembly according to an embodiment of the present invention.
- FIG. 4A is a simplified cross-sectional view illustrating a coupling mechanism between the first and second optical lens elements of FIGS. 2 and 3 .
- FIG. 4B is an image-side top view of the first optical lens element according to an embodiment of the present invention.
- FIG. 4C is an enlarged partial cross-sectional view of FIG. 4A .
- FIG. 5 is a perspective view of the first and second optical lens elements according to an embodiment of the present invention.
- FIG. 6A is a simplified cross-sectional view illustrating a coupling mechanism between the first and second optical lens elements according to an embodiment of the present invention.
- FIG. 6B is an enlarged partial cross-sectional view of FIG. 6A .
- FIG. 7 is a perspective view illustrating a coupling mechanism between the first and second optical lens elements according to an embodiment of the present invention.
- the present invention relates to optical lens assemblies, and more particularly to optical lens assemblies with the first lens element on the object side having a high refractive index and being extremely scratch-resistant.
- Optical lens assemblies can have broad applications in portable and wearable electronic devices, such as mobile phones, head mounted devices, tablet computers, and the like that use a CCD or a CMOS image sensor. Specific embodiments are described below. Those skilled in the art with access to the present disclosure will recognize that other optical lens assemblies can also be designed within the scope of the present invention.
- FIG. 1 is a simplified cross-sectional view of a camera assembly 100 .
- Camera assembly 100 includes a housing 102 supporting a cover glass 104 , a barrel 106 , and an image sensor 108 .
- Barrel 106 includes an optical lens assembly 110 having multiple lens elements L 1 , L 2 , L 3 , and L 4 aligned along an optical axis to direct light received through cover glass 104 onto image sensor 108 .
- Camera assembly 100 may include a filter 120 disposed between optical lens assembly 110 and image sensor 108 .
- Cover glass 104 can be an optically-transparent cover mounted in front of optical lens assembly 120 to prevent dust from entering housing 112 and to protect lens element L 1 against scratches or damage.
- FIG. 2 is a simplified cross-sectional view of a camera lens system 200 according to an embodiment of the present invention.
- Camera lens system 200 includes a housing 202 supporting a barrel 206 and an image sensor 208 .
- An optical lens assembly 210 is mounted within barrel 206 and includes a number of lens elements aligned along the optical axis.
- Four lens elements L 1 , L 2 , L 3 , and L 4 are shown aligned along the optical axis in FIG. 2 , with L 1 being the first lens element, L 2 being the second lens element, L 3 being the third lens element, and L 4 being the fourth element disposed from the object side to the image side in order.
- the number four is arbitrarily chosen for purposes of illustration, and any number of optical lens elements can be included.
- Camera lens system 200 may include a filter 220 for passing a specific light spectrum to image sensor 208 .
- any simplification of the mechanical design which eliminates parts or which simplifies the fabrication process of the optical lens system is advantageous for reducing the fabrication cost, the thickness, and/or the weight of the optical lens system.
- the cover glass has been eliminated to reduce the length (or thickness) of camera lens system 200 .
- the object-side surface of first lens L 1 can be exposed to air or other external elements.
- first lens element L 1 can be made of a sapphire glass, which can be an optically transparent material made predominantly or entirely of sapphire crystals.
- sapphire glass offers a number of advantages. For example, the mechanical strength of sapphire glass provides a substantially higher resistance against scratch and breakage as compared to other optical materials commonly used in compact optical lens assemblies (e.g., plastics). Additionally, sapphire glass has a relatively high index of refraction (greater than 1.6).
- the planar-concave shaped lens element L 1 is easy to fabricate from sapphire glass and can be used as both a lens having a refractive power and a protective cover for the optical lens assembly.
- the planar object-side surface of lens element L 1 can have a diameter in the range between 3 mm and 6 mm, which is suitable for telephoto lens systems having a field of view in the range between 30 degrees and 40 degrees.
- Other lens elements e.g., lens elements L 2 , L 3 , L 4
- lens elements L 2 , L 3 , L 4 can be made of plastic or any other optically-transparent material with a refractive index not equal to 1 .
- FIG. 3 is a perspective view of an optical lens assembly 300 according to an embodiment of the present invention, which can be similar or identical to optical lens assembly 210 of FIG. 2 .
- the optical lens assembly provides a structure without cover glass 104 of FIG. 1 .
- First lens element L 1 has a planar object-side surface 211 , a concave image-side surface 212 in the vicinity of the optical axis, and a planar surface 214 at the image-side periphery (which can be outside the clear-aperture diameter of the image side of lens element L 1 ).
- An annular (ring-shaped) groove 216 can be formed in the image-side periphery of first lens element L 1 .
- Second lens element L 2 has an object-side planar surface 224 at the object-side periphery (which can be outside the clear-aperture diameter of the object side of lens element L 2 ), and an annular (ring-shaped) protrusion 226 is formed on the object-side periphery.
- First lens element L 1 and second lens element L 2 are fittedly engaged with each other by means of annular groove 216 and annular protrusion 226 as shown in FIGS. 2 and 3 .
- FIG. 4A is a simplified cross-sectional view illustrating a coupling mechanism between a first lens element L 1 and a second lens element L 2 according to an embodiment of the present invention.
- First lens element L 1 is shown as having a planar object-side surface 411 and a concave image-side surface 412 in the vicinity of the optical axis and a planar surface 414 at its image-side periphery.
- An annular groove 416 is formed in image-side peripheral surface 414 .
- Groove 416 can be V-shaped, extending inward into the image-side periphery of first lens element L 1 .
- Planar object-side surface 411 of first lens element L 1 can have a diameter “D” in the range between 3 mm and 6 mm, or other diameter as desired.
- Second lens element L 2 has a planar surface 424 at its object-side periphery.
- An annular protrusion 426 is formed on object-side peripheral surface 424 .
- Protrusion 426 can have an inverted V shape having a dimension matching the dimension of groove 416 so that first and second lens elements L 1 and L 2 can be interlocked by inserting protrusion 426 into groove 416 , as shown in FIG. 4A .
- FIG. 4B is a top view of the image-side of first lens element L 1 illustrating annular groove 416 of FIG. 4A .
- the inverted V shaped protrusion of second lens element L 2 provides a satisfactory coupling mechanism to the V-shaped groove of first element L 1
- the height of the protrusion may exceed the depth of the groove, and this may be undesirable.
- the protrusion may have a rounded top surface 428 or a flat top surface 430 , as shown in FIG. 4C .
- FIG. 5 is a simplified cross-sectional view of first lens element L 1 and second lens element L 2 according to another embodiment of the present invention.
- planar surface 514 at the image-side periphery of first lens element L 1 has multiple first fitting members.
- fitting members 516 a and 516 b are disposed at diagonally opposite sides of the image-side periphery of first lens element L 1 .
- two first fitting members are shown, it is understood that any number of first fitting members can be provided.
- each first fitting member has a conical shape having the upper surface coplanar with the planar circumferential image-side surface of first lens element L 1 and the apex pointing toward the planar object-side surface of first lens element L 1 .
- second lens element L 2 is shown to have multiple second fitting members disposed on the planar object-side periphery.
- second fitting members 526 a and 526 b are disposed at diagonally opposite sides of the object-side periphery 524 of second lens element L 2 and have a conical-shaped protrusion configured to couple with first fitting members 516 a and 516 b.
- the conical shaped grooves of first fitting members 516 a and 516 b are configured to receive the corresponding conical-shaped protrusions of second fitting members 526 a and 526 b as indicated by respective arrows 530 and 532 .
- second fitting members 526 a and 526 b can have rounded or flat tops, similarly to embodiments shown in FIG. 4C .
- FIG. 6A is a simplified cross-sectional view of first lens element L 1 and second lens element L 2 according to another embodiment of the present invention.
- First lens element L 1 is shown as having a planar object-side surface 611 , a concave image-side surface 612 in the vicinity of the optical axis and a planar peripheral surface 614 at the image-side periphery.
- a circumferential or annular protrusion 616 is formed on the image-side peripheral surface 614 .
- Protrusion 616 has an inverted V-shape with the base disposed on the planar peripheral surface and the top pointing toward the object-side surface of second lens element L 2 .
- Planar object-side surface 611 of first lens element L 1 can have a diameter D in the range between 3 mm and 6 mm or other diameter as desired.
- Second lens element L 2 has a planar peripheral surface 624 at the object-side periphery.
- a circumferential or annular groove 626 is formed in the planar peripheral surface 624 .
- Groove 626 has a V shape having a dimension matching the dimension of protrusion 616 to receive protrusion 616 so that first and second lens elements L 1 and L 2 can be interlocked by coupling protrusion 616 with groove 626 , as shown in FIG. 6A .
- the inverted V shaped protrusion of first lens element L 2 provides a satisfactory coupling to the V-shaped groove of second lens element L 1
- the height of the protrusion may exceed the depth of the groove, and this may not be desirable.
- the protrusion may have a rounded top surface 618 or a flat top surface 619 , as shown in FIG. 6B .
- FIG. 7 is a simplified cross-sectional view of first lens element L 1 and second lens element L 2 according to yet another embodiment of the present invention.
- planar surface 714 at the image-side periphery of first lens element L 1 has multiple first fitting members.
- fitting members 716 a and 716 b are disposed at diagonally opposite sides of the image-side periphery of first lens element L 1 .
- two first fitting members are shown, it is understood that any number of first fitting members can be provided.
- each first fitting member has a conical shape having the base formed on image-side peripheral surface 714 of first lens element L 1 and the apex pointing toward the object-side surface of second lens element L 2 .
- second lens element L 2 is shown to have multiple second fitting members disposed on the planar object-side circumferential periphery 724 .
- second fitting members 726 a and 726 b are disposed at diagonally opposite sides of the object-side periphery 724 of second lens element L 2 and have a conical-shaped groove configured to receive first fitting members 716 a and 716 b.
- the conical shaped grooves of second fitting members 726 a and 726 b receive the conical-shaped protrusions of first members 726 a and 726 b as indicated by respective arrows 730 and 732 .
- Embodiments of the present invention can simplify fabrication of an optical lens assembly, for example by eliminating the need for a cover glass. This can reduce the length (thickness) of the optical lens system as well as the overall cost of the assembly.
- the use of a sapphire glass for the first lens element provides a scratch resistant optical lens assembly.
- first lens element L 1 can have one or more fitting members formed as conical indentations and one or more fitting members formed as conical protrusions
- object-side periphery of second lens element L 2 can have a complementary set of fitting members.
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Abstract
Description
- The present disclosure relates to optical lens systems, and more particularly to an optical lens assembly having a first lens element made of a sapphire glass and an electronic device including the optical lens assembly.
- Optical imaging systems are commonly incorporated in personal electronic devices such as mobile phones, tablet computers, and the like. The optical imaging systems include an image sensor responsive to incident light and lens elements to direct and focus light onto the image sensor so as to form an image of an object external to the device in which the optical imaging system is incorporated. Such optical imaging systems can include multiple lens elements, and a lens barrel can be provided to hold the lens elements in alignment with each other along an optical axis. In the construction of electronic optical imaging systems, it is desirable to be able to focus incoming light received from an object onto an imaging sensor, such as a charge coupled device (CCD) or a CMOS image sensor.
- Emphasis on compactness of design is especially important to resolving issues such as the thickness of the optical imaging assembly in wearable and portable electronic devices.
- The present disclosure relates to optical lens assemblies, and more particularly to an optical lens assembly with the first lens element on the object side having a high refractive index and being extremely scratch-resistant.
- Certain embodiments of the present invention relate to an optical lens system that can be used in a portable electronic device (e.g., a camera in a cellular phone). Portions of the optical lens system include an optical lens assembly. According to certain embodiments of the present invention, the optical lens assembly may include two or more optical lens elements.
- In some embodiments, an optical lens assembly may include lens elements aligned along an optical axis. A first lens element has a planar object-side surface and a first fitting structure disposed on a periphery of an image-side surface. A second lens element has a second fitting structure disposed on a circumferential periphery of an object-side surface. The first and second fitting structures are fittedly engaged with each other. The first lens element has a refractive index greater than 1.6 and is made of a sapphire glass.
- In some embodiments, the first fitting structure may be an annular-shaped (ring-shaped) groove having a V shape, and the second fitting structure may be an annular-shaped protrusion having an inverted-V shape. In another embodiment, the first fitting structure may be an annular-shaped protrusion having an inverted-V shape, and the second fitting structure may be an annular-shaped groove having a V shape.
- In some embodiments, the annular protrusion may have a flat top surface or a rounded top surface.
- In some embodiments, the first fitting structure may have multiple first fitting members disposed in a regular or irregular pattern along the periphery of the image-side surface of the first lens element, and each of the first fitting member is a groove having a conical shape. The second fitting structure may have multiple second fitting members disposed in a matching position in relation to the location of the first fitting members. Each of the second fitting members can be a protruding cone that fittedly engages with a corresponding conical groove.
- In some embodiments, the first fitting structure may have multiple first fitting members disposed in a regular or irregular pattern along the periphery of the image-side surface of the first lens element. Each of the first fitting members can be a protruding cone having a base at the image-side surface and an apex protruding toward the object-side surface of the second lens element. The second fitting structure may have multiple second fitting members disposed in a matching position in relation to the location of the first fitting members. Each of the second fitting members can be a groove having a conical shape for receiving a corresponding protruding cone.
- Embodiments of the present invention can provide a simplification and improvement in the design and fabrication of the optical lens system that can further reduce the length or thickness of the optical lens assembly.
- The following description, together with the accompanying drawings, will provide a better understanding of the nature and advantages of the claimed invention.
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FIG. 1 is a simplified cross-sectional view of a camera assembly. -
FIG. 2 is a simplified cross-sectional view of an optical lens system according to an embodiment of the present invention. -
FIG. 3 is a perspective view of an exemplary optical lens assembly according to an embodiment of the present invention. -
FIG. 4A is a simplified cross-sectional view illustrating a coupling mechanism between the first and second optical lens elements ofFIGS. 2 and 3 . -
FIG. 4B is an image-side top view of the first optical lens element according to an embodiment of the present invention. -
FIG. 4C is an enlarged partial cross-sectional view ofFIG. 4A . -
FIG. 5 is a perspective view of the first and second optical lens elements according to an embodiment of the present invention. -
FIG. 6A is a simplified cross-sectional view illustrating a coupling mechanism between the first and second optical lens elements according to an embodiment of the present invention. -
FIG. 6B is an enlarged partial cross-sectional view ofFIG. 6A . -
FIG. 7 is a perspective view illustrating a coupling mechanism between the first and second optical lens elements according to an embodiment of the present invention. - The present invention relates to optical lens assemblies, and more particularly to optical lens assemblies with the first lens element on the object side having a high refractive index and being extremely scratch-resistant. Optical lens assemblies can have broad applications in portable and wearable electronic devices, such as mobile phones, head mounted devices, tablet computers, and the like that use a CCD or a CMOS image sensor. Specific embodiments are described below. Those skilled in the art with access to the present disclosure will recognize that other optical lens assemblies can also be designed within the scope of the present invention.
- It should be understood that the drawings are not drawn to scale, and similar reference numbers are used for representing similar elements. For example, the dimensions of some of the elements may be exaggerated relative to others for clarity. Various embodiments are described herein by way of example, and features described with respect to different embodiments may be combined and interchanged, without departing from the scope or spirit of the present invention.
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FIG. 1 is a simplified cross-sectional view of acamera assembly 100.Camera assembly 100 includes ahousing 102 supporting a cover glass 104, abarrel 106, and animage sensor 108.Barrel 106 includes anoptical lens assembly 110 having multiple lens elements L1, L2, L3, and L4 aligned along an optical axis to direct light received through cover glass 104 ontoimage sensor 108.Camera assembly 100 may include afilter 120 disposed betweenoptical lens assembly 110 andimage sensor 108. Cover glass 104 can be an optically-transparent cover mounted in front ofoptical lens assembly 120 to prevent dust from entering housing 112 and to protect lens element L1 against scratches or damage. -
FIG. 2 is a simplified cross-sectional view of acamera lens system 200 according to an embodiment of the present invention.Camera lens system 200 includes ahousing 202 supporting abarrel 206 and animage sensor 208. Anoptical lens assembly 210 is mounted withinbarrel 206 and includes a number of lens elements aligned along the optical axis. Four lens elements L1, L2, L3, and L4 are shown aligned along the optical axis inFIG. 2 , with L1 being the first lens element, L2 being the second lens element, L3 being the third lens element, and L4 being the fourth element disposed from the object side to the image side in order. The number four is arbitrarily chosen for purposes of illustration, and any number of optical lens elements can be included.Camera lens system 200 may include afilter 220 for passing a specific light spectrum to imagesensor 208. - Any simplification of the mechanical design which eliminates parts or which simplifies the fabrication process of the optical lens system is advantageous for reducing the fabrication cost, the thickness, and/or the weight of the optical lens system. In the structure shown in
FIG. 2 , for example, the cover glass has been eliminated to reduce the length (or thickness) ofcamera lens system 200. In this structure, the object-side surface of first lens L1 can be exposed to air or other external elements. - In some embodiments, first lens element L1 can be made of a sapphire glass, which can be an optically transparent material made predominantly or entirely of sapphire crystals. The use of sapphire glass offers a number of advantages. For example, the mechanical strength of sapphire glass provides a substantially higher resistance against scratch and breakage as compared to other optical materials commonly used in compact optical lens assemblies (e.g., plastics). Additionally, sapphire glass has a relatively high index of refraction (greater than 1.6). The planar-concave shaped lens element L1 is easy to fabricate from sapphire glass and can be used as both a lens having a refractive power and a protective cover for the optical lens assembly. In some embodiments, the planar object-side surface of lens element L1 can have a diameter in the range between 3 mm and 6 mm, which is suitable for telephoto lens systems having a field of view in the range between 30 degrees and 40 degrees. Other lens elements (e.g., lens elements L2, L3, L4) can be made of plastic or any other optically-transparent material with a refractive index not equal to 1.
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FIG. 3 is a perspective view of anoptical lens assembly 300 according to an embodiment of the present invention, which can be similar or identical tooptical lens assembly 210 ofFIG. 2 . As seen in the cross-sectional view ofFIG. 2 and the perspective view ofFIG. 3 , the optical lens assembly provides a structure without cover glass 104 ofFIG. 1 . First lens element L1 has a planar object-side surface 211, a concave image-side surface 212 in the vicinity of the optical axis, and aplanar surface 214 at the image-side periphery (which can be outside the clear-aperture diameter of the image side of lens element L1). An annular (ring-shaped)groove 216 can be formed in the image-side periphery of first lens element L1. Second lens element L2 has an object-sideplanar surface 224 at the object-side periphery (which can be outside the clear-aperture diameter of the object side of lens element L2), and an annular (ring-shaped)protrusion 226 is formed on the object-side periphery. First lens element L1 and second lens element L2 are fittedly engaged with each other by means ofannular groove 216 andannular protrusion 226 as shown inFIGS. 2 and 3 . -
FIG. 4A is a simplified cross-sectional view illustrating a coupling mechanism between a first lens element L1 and a second lens element L2 according to an embodiment of the present invention. First lens element L1 is shown as having a planar object-side surface 411 and a concave image-side surface 412 in the vicinity of the optical axis and aplanar surface 414 at its image-side periphery. Anannular groove 416 is formed in image-sideperipheral surface 414. Groove 416 can be V-shaped, extending inward into the image-side periphery of first lens element L1. Planar object-side surface 411 of first lens element L1 can have a diameter “D” in the range between 3 mm and 6 mm, or other diameter as desired. Second lens element L2 has aplanar surface 424 at its object-side periphery. Anannular protrusion 426 is formed on object-sideperipheral surface 424.Protrusion 426 can have an inverted V shape having a dimension matching the dimension ofgroove 416 so that first and second lens elements L1 and L2 can be interlocked by insertingprotrusion 426 intogroove 416, as shown inFIG. 4A . -
FIG. 4B is a top view of the image-side of first lens element L1 illustratingannular groove 416 ofFIG. 4A . - While the inverted V shaped protrusion of second lens element L2 provides a satisfactory coupling mechanism to the V-shaped groove of first element L1, there is a possibility, within dimension tolerances in fabrication, that the height of the protrusion may exceed the depth of the groove, and this may be undesirable. In some embodiments, the protrusion may have a rounded
top surface 428 or a flattop surface 430, as shown inFIG. 4C . -
FIG. 5 is a simplified cross-sectional view of first lens element L1 and second lens element L2 according to another embodiment of the present invention. As shown,planar surface 514 at the image-side periphery of first lens element L1 has multiple first fitting members. For example,fitting members - Still referring to
FIG. 5 , second lens element L2 is shown to have multiple second fitting members disposed on the planar object-side periphery. For example, secondfitting members side periphery 524 of second lens element L2 and have a conical-shaped protrusion configured to couple with firstfitting members FIG. 5 , the conical shaped grooves of firstfitting members fitting members respective arrows fitting members FIG. 4C . -
FIG. 6A is a simplified cross-sectional view of first lens element L1 and second lens element L2 according to another embodiment of the present invention. First lens element L1 is shown as having a planar object-side surface 611, a concave image-side surface 612 in the vicinity of the optical axis and a planarperipheral surface 614 at the image-side periphery. A circumferential orannular protrusion 616 is formed on the image-sideperipheral surface 614.Protrusion 616 has an inverted V-shape with the base disposed on the planar peripheral surface and the top pointing toward the object-side surface of second lens element L2. Planar object-side surface 611 of first lens element L1 can have a diameter D in the range between 3 mm and 6 mm or other diameter as desired. Second lens element L2 has a planarperipheral surface 624 at the object-side periphery. A circumferential orannular groove 626 is formed in the planarperipheral surface 624.Groove 626 has a V shape having a dimension matching the dimension ofprotrusion 616 to receiveprotrusion 616 so that first and second lens elements L1 and L2 can be interlocked bycoupling protrusion 616 withgroove 626, as shown inFIG. 6A . - While the inverted V shaped protrusion of first lens element L2 provides a satisfactory coupling to the V-shaped groove of second lens element L1, there is a possibility, within dimension tolerances in fabrication, that the height of the protrusion may exceed the depth of the groove, and this may not be desirable. In some embodiments, the protrusion may have a rounded
top surface 618 or a flattop surface 619, as shown inFIG. 6B . -
FIG. 7 is a simplified cross-sectional view of first lens element L1 and second lens element L2 according to yet another embodiment of the present invention. As shown,planar surface 714 at the image-side periphery of first lens element L1 has multiple first fitting members. For example,fitting members peripheral surface 714 of first lens element L1 and the apex pointing toward the object-side surface of second lens element L2. - Still referring to
FIG. 7 , second lens element L2 is shown to have multiple second fitting members disposed on the planar object-sidecircumferential periphery 724. For example, secondfitting members side periphery 724 of second lens element L2 and have a conical-shaped groove configured to receive firstfitting members FIG. 7 , the conical shaped grooves of secondfitting members first members respective arrows - Embodiments of the present invention can simplify fabrication of an optical lens assembly, for example by eliminating the need for a cover glass. This can reduce the length (thickness) of the optical lens system as well as the overall cost of the assembly. The use of a sapphire glass for the first lens element provides a scratch resistant optical lens assembly.
- While the invention has been described with respect to specific embodiments, one skilled in the art will recognize that numerous modifications are possible. For example, the specific shapes of lens surfaces and number of lenses can be modified as desired. The number, location, and shape of fitting members can also be varied, and fitting members having a combination of different shapes can be used. For example, the image-side periphery of first lens element L1 can have one or more fitting members formed as conical indentations and one or more fitting members formed as conical protrusions, while the object-side periphery of second lens element L2 can have a complementary set of fitting members.
- Thus, although the invention has been described with respect to specific embodiments, it will be appreciated that the invention is intended to cover all modifications and equivalents within the scope of the following claims.
Claims (20)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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US14/448,633 US9244252B1 (en) | 2014-07-31 | 2014-07-31 | Optical lens system |
TW103137644A TWI525359B (en) | 2014-07-31 | 2014-10-30 | Optical lens system |
CN201410608269.8A CN105319666A (en) | 2014-07-31 | 2014-10-31 | Optical lens system |
Applications Claiming Priority (1)
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US14/448,633 US9244252B1 (en) | 2014-07-31 | 2014-07-31 | Optical lens system |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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US9645346B2 (en) * | 2014-11-11 | 2017-05-09 | Fluke Corporation | Self-aligning doublet lens assembly |
Families Citing this family (4)
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CN107748436A (en) * | 2017-11-14 | 2018-03-02 | 歌尔科技有限公司 | Eyepiece and wear display device |
CN108303782A (en) * | 2018-02-11 | 2018-07-20 | 京东方科技集团股份有限公司 | Optical system and mobile terminal |
CN208399783U (en) * | 2018-07-20 | 2019-01-18 | 信泰光学(深圳)有限公司 | Lens assembly |
WO2021168802A1 (en) * | 2020-02-28 | 2021-09-02 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Cover lens and imaging device |
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JPH05288986A (en) * | 1992-04-10 | 1993-11-05 | Olympus Optical Co Ltd | Observation optical system for endoscope |
CN1119686C (en) * | 1998-02-03 | 2003-08-27 | 阿苏拉布股份有限公司 | Lens assembly for photographic camera, camera comprising such lens assembly and method for manufacture thereof |
JP3739295B2 (en) * | 2001-03-23 | 2006-01-25 | カンタツ株式会社 | Optical instrument with two or more lenses positioned and fixed in the lens barrel |
TW200603145A (en) * | 2004-03-26 | 2006-01-16 | Sony Corp | Microlens array substrate and production method therefor |
TW200622343A (en) | 2004-12-24 | 2006-07-01 | Hon Hai Prec Ind Co Ltd | Lens module in portable electronic device |
CN1797054A (en) * | 2004-12-24 | 2006-07-05 | 鸿富锦精密工业(深圳)有限公司 | Portable lens die set in use for electronic equipment |
US7215479B1 (en) | 2006-02-10 | 2007-05-08 | Micron Technology, Inc. | Integrated lens system for image sensor and method for manufacturing the same |
CN101354465A (en) * | 2007-07-26 | 2009-01-28 | 鸿富锦精密工业(深圳)有限公司 | Lens module |
CN101377560B (en) * | 2007-08-29 | 2011-01-12 | 亚洲光学股份有限公司 | Glasses lens set with embedded structure and lens module |
TWI453494B (en) | 2009-11-26 | 2014-09-21 | Hon Hai Prec Ind Co Ltd | Lens module and camera module having same |
WO2011071052A1 (en) * | 2009-12-07 | 2011-06-16 | 旭硝子株式会社 | Optical member, near-infrared cut filter, solid-state imaging element, lens for imaging device, and imaging/display device using the same |
KR101231517B1 (en) | 2011-09-19 | 2013-02-07 | 엘지이노텍 주식회사 | Carmera module |
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- 2014-07-31 US US14/448,633 patent/US9244252B1/en active Active
- 2014-10-30 TW TW103137644A patent/TWI525359B/en active
- 2014-10-31 CN CN201410608269.8A patent/CN105319666A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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US9645346B2 (en) * | 2014-11-11 | 2017-05-09 | Fluke Corporation | Self-aligning doublet lens assembly |
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US9244252B1 (en) | 2016-01-26 |
CN105319666A (en) | 2016-02-10 |
TWI525359B (en) | 2016-03-11 |
TW201604607A (en) | 2016-02-01 |
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