Multi-aperture camera having at least one camera with two zoom states

Abstract

To provide a microphotographing function by using a camera of a type existing in many smartphones without requiring additional dedicated hardware.SOLUTION: A folded camera comprises: a lens that has multiple lens elements along a lens light axis and is divided into at least three lens element groups; an image sensor; an optical path folded element (OPFE); and a first actuator that moves two lens element groups from among at least the three lens element groups together relative to the image sensor in a direction parallel with the lens light axis, and sets the lens to two zoom states. The lens has an effective focal length EFL and an F number F#, the EFL and F# are changed from the minimum values EFLmin and F#min in the first zoom state to the maximum values EFLmax and F#max in the second zoom state, respectively, EFL is equal to or larger than 40 mm, the ratio EFLmax / EFLmin is equal to or larger than 1.5, F#min is equal to or less than 2.8, and F#max is equal to or less than 4.SELECTED DRAWING: Figure 10

Description

[Technical Field]

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS This application claims priority from U.S. Provisional Patent Application No. 62 / 809,871, filed February 25, 2019, which is expressly incorporated herein by reference in its entirety.

[0002] FIELD OF THE INVENTION The embodiments disclosed herein relate generally to digital cameras, and more particularly to dual aperture zoom digital cameras with folded zoom lenses. [Background technology]

[0003] Compact multi-aperture, particularly dual-aperture (also called "dual lens" or "dual camera") digital cameras are known. Miniaturization technologies have enabled compact portable electronic devices, such as tablets and mobile phones (hereinafter collectively referred to as "smartphones"), to incorporate such cameras that provide advanced imaging capabilities, such as zoom (see, e.g., commonly owned PCT Patent Application No. PCT / IB2015 / 056004, which is incorporated herein by reference in its entirety). Such cameras and / or the cameras disclosed herein are cameras with strict height limitations, typically less than 1 cm, and the thinner the better.

[0004] Dual aperture zoom cameras are known in which one camera has a wide field of view (FOV) (a "wide camera") and the other has a narrow FOV (a "tele camera"). Tele cameras are required to have as small dimensions as possible to fit within the thickness of the device in which they are installed (preferably without protruding from the device's housing), while still being suitable for operation with commonly used image sensors. This problem is even more severe when using tele lenses with long ("tele") effective focal lengths (EFL) to achieve relatively high zoom effects. As is known, the term "EFL" applied to a lens refers to the distance from the back principal plane to the paraxial focal plane. The back principal plane is calculated by tracing near-base rays on the axis from infinity and is determined using the angles of the marginal rays in image space near the base.

[0005] A dual aperture zoom camera comprising an upright wide camera and a folded tele camera is disclosed, for example, in commonly owned U.S. Patent No. 9,392,188. The wide camera is an "upright" camera comprising a wide image sensor and a wide lens module including a wide fixed focus lens assembly (or simply "lens") having a wide lens axis of symmetry. The folded tele camera comprises a tele image sensor and a tele lens module including a tele fixed focus lens having a tele lens axis of symmetry. The dual aperture zoom camera further comprises a reflective element (also called an optical path folding element or OPFE) that bends light coming from an object or scene along a first optical path toward the tele image sensor and into a second optical path. The first and second optical paths are perpendicular to each other. The wide lens axis of symmetry is along (parallel to) the first optical path, and the tele lens axis of symmetry is along the second optical path. The reflective element has a reflective element axis of symmetry tilted at substantially 45 degrees relative to both the wide lens axis of symmetry and the tele lens axis of symmetry, and operates to provide a folded optical path between the object and the tele image sensor.

[0006] Wide lens provides a wide field of view (FOV) W ) and the telephoto lens has FOV W Narrower telephoto field of view (FOV T ) In the example, the tele camera provides a X5 zoom effect compared to the wide camera.

[0007] Compact folded cameras are also known, having lens assemblies that include multiple lens elements divided into two or more groups, with one or more of the lens elements ("groups") being movable relative to another lens element or group of lens elements. Actuators (motors) used for relative motion include screw-type stepper motors or piezoelectric actuators. However, a common problem with such cameras is that their architecture dictates fairly large F-numbers (F#s) of 3 or more, with the F# increasing with the zoom factor. These actuators are slow and noisy (piezoelectric) or bulky (stepper motors), have reliability issues, and are expensive. Furthermore, known optical designs require a large lens assembly height for a given F# for the two extreme zoom states available with such cameras.

[0008] "Macro-photography" mode is becoming popular as a differentiator for smartphone cameras. "Macro-photography" refers to capturing images of objects very close to the camera, such that the image recorded on the image sensor is approximately the same size as the actual object being photographed. For example, "macro-photography" may refer to capturing images of tiny objects and organisms, such as insects, where the size of the object in the image is larger than life-size. "Macro-photography" produces a "macro image."

[0009] The first smartphone models to offer macro photography capabilities have entered the consumer market by including a dedicated macro camera with a macro FOV. However, it would be beneficial to provide macro photography capabilities using the type of camera already present in many smartphones, without requiring additional dedicated hardware. Summary of the Invention

[0010] In an exemplary embodiment, a folded camera is provided that includes a lens having lens element group G1, lens element group G2, and lens element group G3 along a lens optical axis, an image sensor, an OPFE, and an actuator for moving G1 and G3 together relative to the image sensor in a direction parallel to the lens optical axis to put the lens into two zoom states, where G1 and G3 are fixedly attached to each other and G2 floats between two stops, and moving G1 and G3 together allows G2 to be attached to G1 in one zoom state and G2 to be attached to G3 in another zoom state.

[0011] In some embodiments, the fixed attachment between G1 and G3 is provided by rods connecting G1 and G3, where G2 is guided by the rods and can move relative to the rods along a direction parallel to the lens axis. The attachment of G2 to G1 or G3 may be magnetic.

[0012] In some embodiments, the movement of G1 and G3 together spans a stroke of more than 2 mm and less than 20 mm, and the stroke of movement of G2 between the two stops is less than half the stroke of G1 and G3.

[0013] In some embodiments, the lens has an effective focal length EFL, the EFL being a minimum value EFL in the first zoom state. ,min to the maximum value EFL in the second zoom statemax The ratio of EFL to max / EFL ,min is greater than 1.5.

[0014] In some embodiments, the actuator comprises a shape memory alloy (SMA) actuator having a plurality of SMA springs and a plurality of mechanical springs.

[0015] In some embodiments, the plurality of SMA springs includes four springs and the plurality of mechanical springs includes two springs.

[0016] In some embodiments, the camera further comprises a voice coil motor (VCM) mechanism for focusing the lens. In some embodiments, the focusing of the lens is performed by moving G1, G2, and G3 together. In some embodiments, the lens is included in a lens and sensor module that also comprises a G2 stop mechanism having a first G2 stop and a second G2 stop, one of the first or second G2 stops being removable to allow G1, G2, and G3 to move over a stroke of 2 mm or more for macro photography.

[0017] In some embodiments, the actuator comprises at least three coils coupled to each of a plurality of magnets or to polarizations of a plurality of magnets, hi some embodiments, the positions of the at least three coils relative to the plurality of magnets are measured by at least one Hall bar sensor for position sensing.

[0018] In some embodiments, the at least three coils are driven by respective drive currents that provide movement relative to the plurality of magnets, the drive currents being dependent on the position of the plurality of coils relative to the plurality of magnets.

[0019] In an exemplary embodiment, a folded camera is provided that includes a lens having lens element group G1, lens element group G2, and lens element group G3 along a lens optical axis, an image sensor, an OPFE, and a VCM mechanism for focusing the lens by moving G1, G2, and G3 together in a direction parallel to the lens optical axis, and for moving G1 and G3 together relative to the image sensor for zooming in a direction parallel to the lens optical axis, and for putting the lens into two zoom states, where G1 and G3 are fixedly attached to each other and G2 floats between two stops, and moving G1 and G3 together allows G2 to be attached to G1 in one zoom state and G2 to be attached to G3 in another zoom state.

[0020] In some embodiments, the folded camera further includes a first G2 stop and a second G2 stop, one of the first or second G2 stops being removable to allow G1, G2, and G3 to move over a stroke of 2 mm or more for macro photography.

[0021] In an exemplary embodiment, a wide range of effective focal lengths EFL W and a wide camera including a wide lens having a first optical axis, a wide image sensor, and a folded telecamera including a telelens having a first optical axis, a teleimage sensor, and an OPFE, wherein the telelens includes, from an object side to an image side, a first lens element group G1, a second lens element group G2, and a third lens element group G3, at least two of the lens element groups are movable along the first optical axis relative to the image sensor to set the telelens to two zoom states, and the effective focal length of the telelens is adjusted by adjusting the EFL in one zoom state. Tmin From the other zoom state to the EFL Tmax Change to EFL Tmin >1.5×EFL W and EFL Tmax>1.5×EFL Tmin The wide lens has a second optical axis, and the second optical axis is perpendicular to the first optical axis.

[0022] In some embodiments (not shown), the folded telecamera described above may be replaced by a non-folded (upright) telecamera with the same structure and characteristics, i.e., the non-folded telecamera comprises a telelens comprising, from object side to image side, a first lens element group G1, a second lens element group G2, and a third lens element group G3, at least two of which are movable along the first optical axis relative to the image sensor to set the telelens in two zoom states, and the effective focal length of the telelens is EFL in one zoom state. Tmin From the other zoom state to the EFL Tmax was changed to EFL Tmin >1.5×EFL W and EFL Tmax >1.5×EFL Tmin is.

[0023] In some exemplary embodiments, the telecamera is configured such that in both the first zoom state and the second zoom state, lens element groups G1, G2, and G3 are shifted relative to one another to achieve focus.

[0024] In some exemplary embodiments, lens element groups G1, G2, and G3 are arranged from the object side to the image side, with G1 having positive refractive power, G2 having positive refractive power, and G3 having negative refractive power.

[0025] In some exemplary embodiments, the at least two movable lens element groups include the lens element groups G1 and G3, where the lens element groups G1 and G3 are movable relative to the image sensor and the lens element group G2, and the lens element group G2 is stationary relative to the image sensor. In some embodiments, the lens element group G3 may be further movable relative to the image sensor, the lens element group G1, and the lens element group G2 for focusing. In some embodiments, the lens element group G1 may be further movable relative to the image sensor, the lens element group G2, and the lens element group G3 for focusing.

[0026] In an exemplary embodiment, the first lens element L1 towards the object side has a clear aperture (CA) value (or simply "clear aperture") that is larger than the clear apertures of all other lens elements in the telelens.

[0027] In an exemplary embodiment, the telelens has a total track length (TTL T ) and has a maximum TTL T (TTL Tmax ) is the TTL Tmax <EFL Tmax Meet the conditions.

[0028] In an exemplary embodiment, the telelens has a total track length (TTL T ) and has a maximum TTL T (TTL Tmax ) is the TTL Tmax <0.9×EFL Tmax Meet the conditions.

[0029] In an exemplary embodiment, the telelens has a telelens F-number (F# T ) and F# T Minimum value of (F# Tmin ) in F# Tmin <1.5×F# Tmax ×EFLTmin / EFL Tmax Meet the conditions.

[0030] In an exemplary embodiment, the telelens has a telelens F-number (F# T ) and F# T Minimum value of (F# Tmin ) and F# T Maximum value of (F# Tmax ) in F# Tmin <1.8×F# Tmax ×EFL Tmin / EFL Tmax Meet the conditions.

[0031] In an exemplary embodiment, the telelens has a telelens F-number (F# T ) and F# T Minimum value of (F# Tmin ) and F# T Maximum value of (F# Tmax ) in F# Tmin <1.2×F# Tmax ×EFL Tmin / EFL Tmax Meet the conditions.

[0032] In an exemplary embodiment, for any lens element group, movement from the first zoom state to the second zoom state is 0.75×(EFL Tmax -EFL Tmin ) has a smaller stroke.

[0033] In an exemplary embodiment, for any lens element group, movement from the first zoom state to the second zoom state is 0.6×(EFL Tmax -EFL Tmin ) has a smaller stroke.

[0034] In an exemplary embodiment, the first lens element L1 is a cut lens element.

[0035] In some exemplary embodiments, the at least two movable lens element groups include the lens element groups G1, G2, and G3, and the lens element groups G1 and G3 are movable relative to the image sensor and the lens element group G2 within a given range R 1,3 and the lens element group G2 is movable as a unit at R 1,3 In exemplary embodiments, the lens element groups G1, G2, and G3 are movable toward the image side. In some exemplary embodiments, the lens element groups G1, G2, and G3 are movable as a unit relative to the image sensor for focusing.

[0036] In some exemplary embodiments, the EFL Tmin = 15mm, EFL Tmax =30mm.

[0037] In some exemplary embodiments, the EFL Tmin = 13mm, EFL Tmax =26mm.

[0038] In some exemplary embodiments, in the two zoom states, R AF is the maximum range of movement of the lens element group G2 required for focusing between infinity and 1 meter, and R AF <0.4×R2. In some exemplary embodiments, in the two zoom states, R AF is the maximum range of movement of the lens element groups G1 and G3 required for focusing between infinity and 2 meters, and R AF <0.4×R 1,3 is.

[0039] In some exemplary embodiments, actuation for movement of the lens element group G2 is performed with closed-loop control.

[0040] In some exemplary embodiments, actuation for movement of the lens element groups G1 and G3 is performed with open loop control.

[0041] In some exemplary embodiments, the movement of the lens element groups G1, G2, and G3 is caused using a voice coil motor (VCM) mechanism.

[0042] In some exemplary embodiments, the movement of the lens element groups G1, G2, and G3 is guided along the first optical axis by a ball guide mechanism that forms a linear rail. In some exemplary embodiments, the ball guide mechanism includes at least one groove on the lens carrier of G2, at least one groove on the lens carriers of G1 and G3, and a plurality of balls between the groove on the lens carrier of G2 and the grooves on the lens carriers of G1 and G3.

[0043] In an exemplary embodiment, a wide range of effective focal lengths EFL W and a wide camera including a wide lens having a first optical axis, a wide image sensor, and a folded telecamera including a telelens having a first optical axis, a teleimage sensor, and an OPFE, wherein the telelens includes, from an object side to an image side, a first lens element group G1, a second lens element group G2, and a third lens element group G3, and the lens element groups G1 and G3 are arranged within a given range R. 1,3 and the lens element group G2 is movable along the first optical axis as a unit relative to the image sensor and the lens element group G2, and the lens element group G2 is movable within a range R 1,3 and a telelens element group G1, G2, and G3, which is movable along a first optical axis relative to the image sensor within a range R2 smaller than the range R1 in one zoom state, and the combined movement of the lens element groups G1, G2, and G3 places the telelens in two states, and the EFL of the telelens is Tmin From the other zoom state to the EFL Tmax Change to EFL Tmin >EFL W and EFL Tmax >1.5×EFL TminIt offers a dual camera.

[0044] In an exemplary embodiment, a folded camera is provided, comprising a lens having a first optical axis, an image sensor, and an OPFE, wherein the lens includes, from an object side to an image side, a first lens element group G1, a second lens element group G2, and a third lens element group G3, and the lens element groups G1 and G3 are arranged within a given range. 1,3 and the lens element group G2 is movable along the first optical axis as a unit relative to the image sensor and the lens element group G2, and the lens element group G2 is movable within a range R 1,3 a first optical axis R2 of the telelens relative to the image sensor, the combined movement of the lens element groups G1, G2, and G3 providing the telelens with two zoom states and adjusting the EFL of the telelens by a range R3 of 1 / 2 of the EFL in one zoom state; min From the other zoom state to the EFL Tmax Change to EFL max >1.5×EFL min The present invention provides a bendable camera.

[0045] In an exemplary embodiment, a wide range of effective focal lengths EFL W and a wide camera having a wide lens and a wide image sensor, and an ultra-wide effective focal length EFL UW and an ultra-wide camera including an ultra-wide lens having the above-mentioned configuration and an ultra-wide image sensor; and a folded telecamera including a telelens having a first optical axis, a teleimage sensor, and an OPFE, wherein the telelens includes, from an object side to an image side, a first lens element group G1, a second lens element group G2, and a third lens element group G3, at least two of the lens element groups are movable along the first optical axis relative to the image sensor to set the telelens to two states, a first zoom state and a second zoom state, and an EFL of the telelens is set to an EFL in the first zoom state. Tmin to the EFL in the second zoom state Tmax Change to EFL Tmin >1.5×EFLW and EFL Tmax >1.5×EFL Tmin It offers a dual camera.

[0046] In an exemplary embodiment, a dual camera is provided, comprising: a wide camera module (or simply "wide camera"); a tele camera module (or simply "tele camera") comprising a lens module, a lens actuator for moving the lens module between a first zoom state and a second zoom state; and a memory for storing first calibration data and second calibration data, wherein the first calibration data may include calibration data between the wide camera module and the tele camera module in the first zoom state, and the second calibration data may include calibration data between the wide camera module and the tele camera module in the second zoom state.

[0047] In various exemplary embodiments, a system is provided comprising: an application processor (AP); a wide camera module for providing first image data; a tele camera module for providing second image data, the tele camera module comprising a lens module and a lens actuator for moving the lens module between a first zoom state and a second zoom state; and a memory for storing first calibration data and second calibration data, wherein the first calibration data may include calibration data between the wide camera module and the tele camera module in the first zoom state and the second calibration data may include calibration data between the wide camera module and the tele camera module in the second zoom state, and the AP is configured to process the first image data and the second image data using the first calibration data when the tele camera module is in the first zoom state, and to process the first image data and the second image data using the second calibration data when the tele camera module is in the second zoom state to generate third image data.

[0048] In an embodiment of the system, the first calibration data is stored in the first camera module and the second calibration data is stored in the second camera module.

[0049] In an embodiment of the system, the first calibration data and the second calibration data are stored only in the telecamera module.

[0050] In an embodiment of the system, the first calibration data and the second calibration data are stored only in the wide camera module.

[0051] In an embodiment of the system, the first calibration data and the second calibration data are stored in a memory that is not located in either the wide camera module or the tele camera module.

[0052] In an embodiment of the system, a first portion of the first calibration data and a first portion of the second calibration data are stored in a memory located in the wide camera module or the telecamera module, and a second portion of the first calibration data and a second portion of the second calibration data are stored in a memory not located in the wide camera module or the telecamera module. [Brief explanation of the drawings]

[0053] Non-limiting examples of embodiments disclosed herein are described below with reference to the drawings accompanying this specification, which are set forth after this paragraph. Identical structures, elements, or parts that appear in multiple figures are generally numbered identically in all figures in which they appear. Where identical elements are shown but numbered in only one figure, they are considered to have the same number in all figures in which they appear. The drawings and descriptions are intended to elucidate and clarify the embodiments disclosed herein and should not be considered limiting in any way. [Figure 1A] FIG. 1 is a schematic perspective view of a dual camera including an upright camera and a zoom folded camera. [Figure 1B] FIG. 1B is an exploded view of the dual camera of FIG. 1A. [Figure 2A] FIG. 1C illustrates a folded zoom camera as shown in FIGS. 1A and 1B with a first lens optical design and ray tracing in a first zoom state. [Figure 2B] FIG. 1C illustrates a folded zoom camera as shown in FIGS. 1A and 1B with a first lens optical design and ray tracing in a second zoom state. [Figure 2C] FIG. 2 shows details of a lens element having a first optical design in a first zoom state. [Figure 2D] FIG. 2 shows details of a lens element having a first optical design in a second zoom state. [Figure 3A] FIG. 10 shows details of lens elements having a second optical design in a first zoom state. [Figure 3B] FIG. 10 shows details of lens elements having a second optical design in a second zoom state. [Figure 4A] FIG. 10 shows details of lens elements having a third optical design in a first zoom state. [Figure 4B] FIG. 10 shows details of lens elements having a third optical design in a second zoom state. [Figure 4C] FIG. 10 shows details of lens elements having a fourth optical design in a first zoom state. [Figure 4D] FIG. 10 shows details of a lens element having a fourth optical design in a second zoom state. [Figure 4E] FIG. 10 shows details of a lens element having a fifth optical design in a first zoom state. [Figure 4F] FIG. 10 shows details of a lens element having a fifth optical design in a second zoom state. [Figure 4G]FIG. 10 shows details of a lens element having a sixth optical design in a first zoom state. [Figure 4H] FIG. 10 shows details of a lens element having a sixth optical design in a second zoom state. [Figure 5A] 1 shows a schematic diagram of a first embodiment of a telelens and sensor module in the EFLTmin state, viewed from above at an angle. FIG. [Figure 5B] 5B is a schematic diagram of the telelens and sensor module of FIG. 5A viewed from another angle on top. [Figure 5C] FIG. 10 is a diagram showing a schematic view of the telelens and sensor module in the EFLTmax state from above at an angle. [Figure 5D] 5D is a schematic diagram of the telelens and sensor module of FIG. 5C viewed from another angle on top. [Figure 5E] FIG. 5B is an exploded view of the telelens and sensor module of FIGS. 5A to 5D. [Figure 6A] 5C is a bottom view of the upper and lower actuation assemblies of the telelens and sensor module in the EFLTmin state as shown in FIGS. 5A and 5B, viewed from an angle. FIG. [Figure 6B] 5C and 5D, from another angle, and a bottom view of the upper and lower actuation assemblies of the telelens and sensor module in the EFLT max state. [Figure 6C] FIG. 13 shows the upper actuation assembly from a bottom view. [Figure 7] FIG. 6 shows details of the stationary rails in the telelens and sensor modules of FIGS. 5A-5E. [Figure 8] FIG. 6 shows the electronic assembly of the telelens and sensor module of FIGS. 5A-5E. [Figure 9A] FIG. 1 illustrates a lens element with axial symmetry. [Figure 9B] FIG. 1 shows a cut lens element having two cuts. [Figure 10] 1 is a flowchart illustrating an exemplary method for operating a zoom articulated camera disclosed herein. [Figure 11A] 2A-2C are schematic diagrams of impact points of light rays impinging on a convex surface of a lens element and orthogonal projections of the impact points on a plane P, according to some examples of the disclosed subject matter. [Figure 11B] 2A-2C are schematic diagrams of impact points of light rays impinging on a concave surface of a lens element and orthogonal projections of the impact points on a plane P, according to some examples of the disclosed subject matter. [Figure 12] 1 is a schematic diagram of an orthogonal projection of an impact point on a plane P and a clear height value (CH), according to some examples of the disclosed subject matter. [Figure 13] 1 is a schematic diagram of an orthogonal projection of an impact point on a plane P and a clear aperture, according to some examples of the disclosed subject matter. [Figure 14] 1 is a block diagram that schematically illustrates an embodiment of a system disclosed herein. [Figure 15A] 1A-1C show schematic designs of dual and triple aperture cameras with folded and non-folded lens designs. [Figure 15B] 1A-1C show schematic designs of dual and triple aperture cameras with folded and non-folded lens designs. [Figure 15C] 1A-1C show schematic designs of dual and triple aperture cameras with folded and non-folded lens designs. [Figure 16A] 10 shows a schematic diagram of a second embodiment of a telelens and sensor module with a lens having the optical design of the sixth example, from a top perspective, in the state of EFLTmin. FIG. [Figure 16B] 16B is a schematic diagram of the module of FIG. 16A in a state of EFLT max from a top perspective. FIG. [Figure 16C]FIG. 16B is a diagram showing a detailed schematic view of a portion of the module of FIG. 16A. [Figure 16D] FIG. 16C is a diagram showing a detailed schematic view of a portion of the module of FIG. 16B. [Figure 16E] 16B is a diagram showing a schematic view of a portion of the module of FIG. 16A in a side view. FIG. [Figure 16F] 16C is a diagram showing a schematic view of a portion of the module of FIG. 16B in a side view. [Figure 16G] 16B is a diagram showing a schematic detail of a portion of the module of FIG. 16A in a state of EFLTmin, in a first perspective top view. FIG. [Figure 16H] 16B is a diagram showing a schematic detail of a portion of the module of FIG. 16A in a state of EFLTmin, in a second perspective top view. FIG. [Figure 17A] 10 shows a schematic view of a third embodiment of a telelens and sensor module with a lens having the optical design of the sixth example, in a state of EFLTmin, from a top perspective; FIG. [Figure 17B] FIG. 17B is a diagram illustrating the module of FIG. 17A in the EFLT max state. [Figure 17C] FIG. 17C is a diagram showing a detailed schematic view of a portion of the module of FIG. 17B. [Figure 17D] FIG. 17C is a diagram schematically illustrating further details of a portion of the module of FIG. 17B. [Figure 17E] FIG. 17C shows a magnet assembly within the module of FIGS. 17A and 17B. [Figure 17F] 17B is a schematic diagram illustrating one method of operation by the VCM in the module of FIG. 17A between the EFLTmin and EFLTmax states. FIG. [Figure 17G] 17F in a state of EFLTmin, showing an operating method for performing zoom state switching of the VCM of FIG. 17F in a state of EFLTmin, as viewed from a first side. FIG. [Figure 17H] 17F in the state of EFLTmax, showing an operating method for performing zoom state switching of the VCM of FIG. 17F in the state of EFLTmax, as seen from a second side. FIG. [Figure 17I] 7G and 17H, showing an operating method for focusing in the EFLTmin state. FIG. [Figure 17J] 7H and 17H, showing an operating method for focusing in the EFLTmax state. FIG. [Figure 18A] 10 shows a perspective view of an embodiment of a bonding subsystem for bonding lens group G2 to lens group G1. [Figure 18B] 18B illustrates the adhesive subsystem embodiment of FIG. 18A in another perspective view. [Figure 18C] 10 shows a perspective view of another embodiment of a bonding subsystem for bonding lens group G2 to lens group G3 at EFLTmax zoom. [Figure 18D] 18D shows another perspective view of the adhesive subsystem embodiment of FIG. 18C. [Figure 19A] A perspective view of the G2 stop removal mechanism in the state where G2 stop is activated in the EFLTmax state is shown. [Figure 19B] 19B shows the G2 stop removal mechanism of FIG. 19A in macro photography mode with the G2 stop deactivated. [Figure 19C] This shows the parts of the G2 stop removal mechanism in the EFLTmin or EFLTmax states when G2 stop is activated. [Figure 19D] The portion of the G2 stop removal mechanism of FIG. 19C is shown at EFLTmin or EFLTmax, when the G2 stop is inactivated. DETAILED DESCRIPTION OF THE INVENTION

[0054] 1A is a schematic perspective view of one dual camera embodiment, generally designated 100, comprising an upright wide camera 102, a folded telecamera 103 comprising an OPFE 104 (e.g., a prism), and a zoom folded telecamera lens and sensor module (or simply "module") 106. The wide camera has a fixed effective focal length EFL W For example, the wide lens 110 includes an EFL W The distance between the OPFE 104 and the camera 103 may be 2 to 5 mm. In the telecamera 103, the OPFE 104 is held in a prism holder 108. The module 106 includes a shield 107. The shield 107 may cover some or all elements of the module 106 or the camera 103. FIG. 1B shows the dual camera 100 with the shield 107 removed and described in more detail. The module 106 further includes a telelens 114 having a telelens optical axis 116, a teleimage sensor 118, and, optionally, a glass window 130 (see, for example, FIG. 2A). The glass window 130 may be used to filter light in infrared (IR) wavelengths, for mechanical protection of the sensor 118, and / or to protect the sensor 118 from dust. For simplicity, the term "tele" used in reference to the camera, lens, or image sensor may hereafter be dropped. In some embodiments, the lens and image sensor modules are separated so that the tele camera has its own image sensor module, and other functions and parts described below (particularly the operation of the tele camera lens and sensor module 500 in FIGS. 5A-E, actuator 1610 in FIGS. 16A-H, and actuator 1710 in FIGS. 17A-J) remain solely in the tele camera lens module. The entire following description also refers to such embodiments. In other embodiments, the systems described herein can include one or more additional cameras, for example, forming a 3x camera system. In addition to the wide and tele cameras, the 3x camera may be configured such that the EFL of the ultra-wide camera is greater than the EFL. UW <0.7×EFL W It may also include an ultra-wide camera.

[0055] Dual camera 100 further includes or is coupled to a controller (not shown) that controls various camera functions, including the movement of lens groups and lens elements, as described below.

[0056] The lens 114 includes three lens element groups G1, G2, and G3 housed in a first group (G1) lens housing (or "holder") 120, a second group (G2) lens housing 122, and a third group (G3) lens housing 124, respectively. Details of three different lens designs for the lens element groups G1, G2, and G3 are provided below with reference to FIGS. 2-4. In various embodiments described in detail below, at least one lens element group moves relative to another lens element group along the lens optical axis 116 to provide at least two telelens effective focal lengths EFL T , i.e., minimum EFL Tmin and maximum EFL Tmax For example, EFL Tmin may be 10-20mm, EFL Tmax This allows for a small F-number (F#) of the telephoto lens. T ) while providing zoom capability between two large EFLs. Tmin The optical zoom is EFL W and EFL Tmax For example, more than twice the EFL as provided by the Dual Camera 100 W Furthermore, for EFL, the total telephoto lens track length (TTL T ) is defined as the distance along the optical axis from the first surface of the first lens element towards the object side (S1, see below) to the image sensor surface when the lens is focused at infinity, including all lens elements and glass windows. Tmin is defined and TTL is used for the second zoom state. Tmax is defined. Tmin and TTL Tmaxare depicted in, for example, Figures 2C, 2D, 3A, and 3B, but these definitions apply to all embodiments in this application.

[0057] FIG. 2A shows a zoom folded telecamera 103′ such as camera 103 having an OPFE 104 (e.g., a prism), a lens 114′ such as lens 114, and an image sensor 118 having a first exemplary optical design and ray tracing of telelens 114′, where the telelens is in a first zoom state, i.e., EFL=EFL Tmin In addition, a glass window 130 may be disposed between all the lens elements and the image sensor 118. Figure 2B shows the second zoom state, i.e., EFL = EFL Tmax 2C shows a detail of the lens 114' with a first optical design in a first zoom state, and FIG. 2D shows a detail of the lens 114' in a second zoom state.

[0058] Lens 114' has a first exemplary optical design represented by Tables 1-4 and includes eight lens elements labeled L1 through L8, starting with L1 on the object side facing the prism ("object side") and ending with L8 on the image side toward the image sensor. Table 1 shows optical data for each of the surfaces in the optical lens design. Optical data for the OPFE (prism or mirror) has been omitted from Table 1 because many OPFE designs known in the art can be used between the object and S1. Non-limiting examples of such OPFEs include prisms made of glass or plastic, where the refractive index of the prism can be varied (e.g., ranging from 1 to 3), OPFEs that limit stray light (e.g., as disclosed in commonly owned International Patent Application No. PCT / IB2018 / 054928), thin prisms (see, e.g., commonly owned U.S. Provisional Patent Application No. 62 / 657,003), scanning OPFEs (see, e.g., commonly owned International Patent Applications Nos. PCT / IB2018 / 050885 and PCT / IB2017 / ), OPFEs with OIS mechanisms (see, e.g., commonly owned U.S. Patent No. 9,927,600), and mirrors.

[0059] Table 2 provides zoom data, which is additional data for the distances between surfaces in Table 1, and parameters that change for various zoom positions. Table 3 provides aspheric data, which is additional optical data for the surfaces in Table 1 that are not spherical. Table 4 provides focal lengths (in mm) of lens elements and lens element groups. Similar tables exist below for a second exemplary optical design (Tables 5-8), a third exemplary optical design (Tables 9-12), a fourth exemplary optical design (Tables 13-16), and a fifth exemplary optical design (Tables 17-20).

[0060] The lenses disclosed in the various exemplary embodiments below comprise several lens groups (G1, G2, G3, etc.) of lens elements, each group containing a number of lens elements, denoted Li. Each lens element Li has a respective front surface S 2i-1 and rear S 2i (where "i" is an integer from 1 to N). As used herein, the term "front surface" of each lens element refers to the surface of the lens element located closer to the camera entrance (camera object side), and the term "rear surface" refers to the surface of the lens element located closer to the image sensor (camera image side). The front and rear surfaces may be aspherical in some cases. The front and rear surfaces may be spherical in some cases. However, they are not limited to these options. Lens elements L1 to LN may be made from various materials, for example, plastic or glass. Some lens elements may be made from different materials than other lens elements. The notations "Gi", "Li", "S" and "S" refer to the lens element surface closer to the image sensor (camera image side). i " is shown in some figures as an example (Fig. 2C and Fig. 2D for the notation "Gi", Fig. 2B for the notation "Li", and Fig. 2C for the notation "S i " notation, see FIG. 4A). However, these notations apply to all embodiments in this application.

[0061] As used herein, the "height" of a component, element, or group of components or elements is defined as the distance along the first optical axis (the Y direction in the exemplary coordinate system) between the lowest point of the component / element / group and the highest point of the component / element / group. The term "upper" or "top" refers to any component / element / section of such group that is closer to and facing the imaged object along the Y axis relative to other sections of the same component / element or group. The term "lower" or "bottom" refers to any component / element / section of such group that is farthest from and facing away from the imaged object along the Y axis relative to other sections of the same component / element or group.

[0062] In Table 1 (as well as Tables 5 and 9), R is the radius of curvature of a surface, and T is the distance along the optical axis from one surface to the next. Because the distance between some lens elements changes with zoom and focus, additional thickness data is provided in Tables 2, 6, and 10 for various zoom and focus positions. Note that TTL T is the sum of all T values ​​from S1 to the image sensor when the object is set to infinity and the additional data in Tables 2, 6, and 10 are used. D is the optical diameter of the surface. D / 2 stands for "semi-diameter" or half the diameter. R, T, and D are in millimeters (mm). Nd and Vd are the refractive index and Abbe number, respectively, of the lens element material between one surface and the next.

[0063] The surface types are defined in Tables 1, 5, and 9, and the surface coefficients are given in Tables 3, 7, and 11. - "plane" - has an infinite radius of curvature; An "Even-Aspherical (EVAS) surface" is defined using Equation 1 and the details thereof shown in Tables 3, 7, and 11.

number

[0064] The -QT1 surface is defined using Equation 2 and sub-equations below:

number

[0065] "Stop surface" (Tables 2, 6, 10, 14, 18, and 22) refers to the lens aperture stop surface position, which may change when shifting from the first zoom state to the second zoom state in embodiments disclosed herein. In this case, the stop determines the F# of the entire lens module. For example, in some embodiments, the amount of light reaching the image plane to form the image for the central field in the first zoom state is determined by an aperture stop near the first object-side lens L1, while the amount of light reaching the image plane to form the image for the central field in the second zoom state is determined by an aperture stop near another lens element (e.g., nearby lens element L4). In other embodiments, the position of the lens aperture stop surface may not change when shifting from the first zoom state to the second zoom state.

[0066] The image sensor diameter D in the table below refers to the maximum diagonal size of the image sensor. [Table 1] [Table 2] [Table 3] [Table 4] In a first example ("Example 1"), lens elements L1-L8 are grouped into three groups: a first group G1 including lens elements L1 and L2, a second group G2 including lens elements L3 and L4, and a third group including lens elements L5-L8. The focal lengths of the lenses or lens groups listed in Table 4 have positive or negative values, indicating the positive or negative refractive power of the associated lens element or lens group. Thus, in Table 4, L1, L3, L5, and L8 have positive refractive power, while L2, L4, L6, and L7 have negative refractive power. Similarly, G1 and G2 have positive refractive power, and G3 has negative refractive power. This also applies to Tables 8 and 12.

[0067] In Example 1, the camera is put into two zoom states by moving groups G1 and G3 relative to image sensor 118 while group G2 remains stationary relative to image sensor 118. G3 can then be further moved to focus in each of the zoom states. Table 2 specifies the exact distances and relative positioning. In Example 1, moving G1 and G3 relative to G2 (and the image sensor) puts the camera into two zoom states. T =EFL Tmin =15mm, F#=F# Tmin = 2.8, and TTL T =TTL Tmin In the first zoom state shown in Figures 2A and 2C, the EFL is 16.309 mm. T =EFL Tmax =30mm, F#=F# Tmax = 4, and TTL T =TTL Tmin2B and 2D, where θ = 27.581 mm. The range of movement can be, for example, 5 to 10 mm. In the first state, G1 is separated from G2 by a distance d4 (for a 15 mm EFL, the distance between S4 and S5 in Table 2, i.e., 0.131 mm), G2 is separated from G3 by a distance d8 (for a 15 mm EFL, the distance between S8 and S9 in Table 2, i.e., 5.080 to 5.364 mm depending on the focus distance), and G3 is separated from window 130 by a distance d16 (for a 15 mm EFL, the distance between S8 and S9 in Table 2, i.e., 5.080 to 5.364 mm depending on the focus distance). 16 and S 17 In the second state, G1 is separated from G2 by a distance d4' (for a 30 mm EFL, the distance between S4 and S5 in Table 2, or 11.403 mm), G2 is separated from G3 by a distance d8' (for a 30 mm EFL, the distance between S8 and S9 in Table 2, or 0.060 to 0.434 mm depending on the focus distance), and G3 is separated from window 130 by a distance d16' (for a 30 mm EFL, the distance between S8 and S9 in Table 2, or 0.060 to 0.434 mm depending on the focus distance). 16 and S 17 The distance between the lens and the target object is 6.114mm to 5.740mm depending on the focal length.

[0068] FIG. 3A shows details of lens elements with an exemplary optical design of a second embodiment in a folded telecamera, such as camera 103, in a first zoom state, and FIG. 3B shows details of lens elements with a second optical design in a second zoom state. The figures show lens 114'', image sensor 118, and optional window 130. The second optical design is represented by Tables 5-8 and includes eight lens elements, labeled L1-L8, starting with L1 on the object side facing the prism and ending with L8 on the image side toward the image sensor. Table 5 lists optical data, Table 6 lists zoom data, Table 7 lists aspheric data, and Table 8 lists the focal lengths of the lenses or lens groups in mm.

[0069] In a second example ("Example 2"), in lens 114'', lens elements L1 to L8 are grouped into three groups: a first group G1 including lens elements L1 and L2, a second group G2 including lens elements L3 to L5, and a third group G3 including lens elements L6 to L8.

[0070] In the second embodiment, a given range R 1,3 While moving groups G1 and G3 together, group G2 is moved relative to the image sensor by R 1,3 The camera is moved in a range R2 smaller than R1, so that the camera is in two zoom states. 1,3 = 7.509 mm and R2 = 1.574 mm. G2 also defines a range R for varying the focal length of the camera 106 from infinity to 1 meter. AF It can be moved at any zoom level relative to the image sensor. Depending on the zoom level, AF can be up to 550 micrometers (μm). Figure 3A shows the EFL T =EFL Tmin =15mm, F#=F# Tmin = 2, and TTL T =TTL Tmin 3B shows Example 2 in a first zoom state where the EFL T =EFL Tmax =30mm, F#=F# Tmax = 4, and TTL T =TTL Tmax 1 shows Example 2 for the second zoom state, where .times. ...

[0071] In the second embodiment, the following conditions are met.

[0072] R 1,3 and R2 is 0.6 × (EFL Tmax -EFL Tmin ), and of course, 0.75 × (EFL Tmax -EFL Tmin ) is less than. F# Tmin is 1.0×F# Tmax ×EFL Tmin / EFLTmax Smaller than 1.2×F# Tmax ×EFL Tmin / EFL Tmax Smaller than 1.5×F# Tmax ×EFL Tmin / EFL Tmax Smaller than 1.8 x F# Tmax ×EFL Tmin / EFL Tmax is smaller than.

[0073] In the first state, G1 is separated from G2 by a distance d4 (for a 15 mm EFL, this is the distance between S4 and S5 in Table 6, i.e., 1.246 to 1.012 mm depending on the focus distance), and G2 is separated from G3 by a distance d10 (for a 15 mm EFL, this is the distance between S4 and S5 in Table 6, i.e., 1.246 to 1.012 mm depending on the focus distance). 10 and S 11 G3 is located at a distance d16 (6.136 to 6.370 mm depending on the focal length) from the window 130 (for a 15 mm EFL, the distance is S in Table 6). 16 and S 17 In the second state, G1 is separated from G2 by a distance d4' (for a 30 mm EFL, this is the distance between S4 and S5 in Table 6, i.e., 7.181 to 6.658 mm depending on the focus distance), and G2 is separated from G3 by a distance d10' (for a 30 mm EFL, this is the distance between S4 and S5 in Table 6, i.e., 7.181 to 6.658 mm depending on the focus distance). 10 and S 11 G3 is located at a distance d16' from the window 130 (0.2 to 0.725 mm depending on the focal length). 16 and S 17 The distance between them is 7.738 mm. [Table 5] [Table 6] [Table 7] [Table 8] FIG. 4A shows details of lens elements with an exemplary optical design of a third embodiment in a folded telecamera, such as camera 103, in a first zoom state, and FIG. 4B shows details of lens elements with the third optical design in a second zoom state. The figures show lens 114''', image sensor 118, and optional window 130. The second optical design is represented by Tables 9-12 and includes eight lens elements, labeled L1-L8, starting with L1 on the object side facing the prism and ending with L8 on the image side toward the image sensor. Table 9 lists optical data, Table 10 lists zoom data, Table 11 lists aspheric data, and Table 12 lists the focal lengths of the lenses or lens groups in mm.

[0074] In lens 114''', lens elements L1 to L8 are grouped into three groups: a first group G1 including lens elements L1 and L2, a second group G2 including lens elements L3 and L4, and a third group G3 including lens elements L5 to L8.

[0075] In a third exemplary use (Example 3), the camera is brought into two zoom states by moving G1 and G3 within a given range relative to the image sensor while keeping G2 stationary. The range of movement can be, for example, 5-10 mm. G1 can be further moved for focusing. In Example 3, moving G1 and G3 relative to G2 (and the image sensor) allows the camera to be placed in an EFL T =EFL Tmin =15mm, F# Tmin = 2.74, and TTL T =TTL Tmin In the first zoom state shown in Figure 4A, EFL = 16.78 mm. T =EFL Tmax =30mm, F#=F# Tmax =4, TTL T =TTL Tmax4B, where θ = 26.958 mm. In the first state, G1 is separated from G2 by a distance d4 (for a 15 mm EFL, this is the distance between S4 and S5 in Table 10, i.e., 0.199 to 0.870 mm depending on the focus distance), G2 is separated from G3 by a distance d8 (for a 15 mm EFL, this is the distance between S8 and S9 in Table 10, i.e., 6.050 mm), and G3 is separated from window 130 by a distance d16 (for a 15 mm EFL, this is the distance between S4 and S5 in Table 10, i.e., 0.199 to 0.870 mm depending on the focus distance). 16 and S 17 In the second state, G1 is separated from G2 by a distance d4 (for a 30 mm EFL, this is the distance between S4 and S5 in Table 10, i.e., 10.377 to 11.031 mm depending on the focus distance), G2 is separated from G3 by a distance d8 (for a 30 mm EFL, this is the distance between S8 and S9 in Table 10, i.e., 0.06 mm), and G3 is separated from window 130 by a distance d16 (for a 30 mm EFL, this is the distance between S4 and S5 in Table 10, i.e., 10.377 to 11.031 mm depending on the focus distance). 16 and S 17 The distance between them is 6.64 mm. [Table 9] [Table 10] [Table 11] [Table 12] FIG. 4C shows details of lens elements having a fourth exemplary optical design in a folded telecamera, such as camera 103, in a first zoom state, and FIG. 4D shows details of lens elements having the fourth optical design in a second zoom state. The figures show lens 114″″, image sensor 118, and optional window 130. The second optical design is represented by Tables 13-16 and includes eight lens elements, labeled L1-L8, starting with L1 on the object side facing the prism and ending with L8 on the image side toward the image sensor. Table 13 shows optical data, Table 14 shows zoom data, Table 15 shows aspheric data, and Table 16 shows the focal lengths of the lenses or lens groups in mm.

[0076] In a fourth example ("Example 4"), in lens 114'''', lens elements L1 to L8 are grouped into three groups: a first group G1 including lens elements L1 and L2, a second group G2 including lens elements L3 to L5, and a third group G3 including lens elements L6 to L8.

[0077] In the fourth embodiment, while G2 is kept stationary relative to the image sensor during the zoom process, a given range R 1,3 By moving G1 and G3 together (as one unit) with R, the camera is put into two zoom states. 1,3 = 7.065 mm. Group G2 does not move when changing zoom states, but G2 has a range R for varying the focal length of camera 106 from infinity to 1 meter. AF It can be moved at any zoom state relative to the image sensor and G1 and G3. Depending on the zoom state, R AF can be up to 730 μm. Figure 4C shows the EFL T =EFL Tmin =15mm, F#=F# Tmin = 2, and TTL T =TTL Tmin 4D shows Example 4 in a first zoom state, where EFL = 17.865 mm. T =EFL Tmax =30mm, F#=F#Tmax = 4, and TTL T =TTL Tmax 4 shows Example 4 in a second zoom state where the zoom ratio is 24.93 mm.

[0078] In the first state, G1 is separated from G2 by a distance d4 (the distance between S4 and S5 in Table 14 for an EFL of 15 mm), and G2 is separated from G3 by a distance d10 (the distance between S4 and S5 in Table 14 for an EFL of 15 mm). 10 and S 11 G3 is separated from the window 130 by a distance d16 (for an EFL of 15 mm, the distance is S in Table 14). 16 and S 17 In the second state, G1 is separated from G2 by a distance d4' (the distance between S4 and S5 in Table 14 for a 30 mm EFL), and G2 is separated from G3 by a distance d10' (the distance between S4 and S5 in Table 14 for a 30 mm EFL). 10 and S 11 G3 is located at a distance d16' from the window 130 (for a 30 mm EFL, the distance is S in Table 14). 16 and S 17 The distance between them is 1 / 2 the distance from the center. [Table 13] [Table 14] [Table 15] [Table 16] FIG. 4E shows details of lens elements having a fifth exemplary optical design in a folded telecamera, such as camera 103, in a first zoom state, and FIG. 4F shows details of lens elements having the fifth optical design in a second zoom state. The figures show lens 114''''', image sensor 118, and optional window 130. The second optical design is represented by Tables 17-20 and includes eight lens elements, labeled L1-L8, starting with L1 on the object side facing the prism and ending with L8 on the image side toward the image sensor. Table 17 shows optical data, Table 18 shows zoom data, Table 19 shows aspheric data, and Table 20 shows the focal lengths of the lenses or lens groups in mm.

[0079] In a fifth example ("Example 5"), in lens 114''''', lens elements L1 to L8 are grouped into three groups: a first group G1 including lens elements L1 and L2, a second group G2 including lens elements L3 to L5, and a third group G3 including lens elements L6 to L8.

[0080] In Example 5, while G2 is kept stationary relative to the image sensor, a given range R 1,3 By moving lens group G1 and lens group G3 together (as one unit, also called the "G1G3 assembly") at R, the camera is brought into two zoom states. 1,3 = 7.697 mm. The G1G3 assembly also includes a range R for varying the focal length of the camera 106 from infinity to 2 meters. AF It can move together with the image sensor and G2 at any zoom state. Depending on the zoom state, R AF The EFL can be up to 1.8 mm. T =EFL Tmin =15mm, F#=F# Tmin = 2, and TTL T =TTL Tmin 4B shows Example 5 in a first zoom state, where the EFL is 18.1 mm. T =EFL Tmax =30mm, F#=F#Tmax = 4, and TTL T =TTL Tmax 1 shows Example 5 in a second zoom state where the zoom ratio is 25.8 mm.

[0081] In the first state, G1 is separated from G2 by a distance d4 (the distance between S4 and S5 in Table 18 for an EFL of 15 mm), and G2 is separated from G3 by a distance d10 (the distance between S4 and S5 in Table 18 for an EFL of 15 mm). 10 and S 11 G3 is separated from the window 130 by a distance d16 (for an EFL of 15 mm, the distance is S in Table 18). 16 and S 17 In the second state, G1 is separated from G2 by a distance d4' (the distance between S4 and S5 in Table 18 for a 30 mm EFL), and G2 is separated from G3 by a distance d10' (the distance between S4 and S5 in Table 18 for a 30 mm EFL). 10 and S 11 G3 is located at a distance d16' from the window 130 (for a 30 mm EFL, the distance is S in Table 17). 16 and S 17 distance from the [Table 17] [Table 18] [Table 19] [Table 20] FIG. 4G shows details of lens elements having an exemplary optical design of the sixth embodiment in a folded telecamera, such as camera 103, in a first zoom state, and FIG. 4H shows details of lens elements having the sixth optical design in a second zoom state. The figures show lens 114″″″, image sensor 118, and optional window 130. The sixth optical design is represented by Tables 21-24 and includes eight lens elements, labeled L1-L8, starting with L1 on the object side facing the prism and ending with L8 on the image side toward the image sensor. Table 21 shows optical data, Table 22 shows zoom data, Table 23 shows aspheric data, and Table 24 shows the focal lengths of the lenses or lens groups in mm.

[0082] In lens 114'''''', lens elements L1-L8 are grouped into three groups: a first group G1 including lens elements L1, L2, and L3, a second group G2 including lens elements L4, L5, and L6, and a third group G3 including lens elements L7 and L8.

[0083] In Example 6, while moving G2 in a range R2 relative to the image sensor, 1,3 By moving G1 and G3 together (as one unit) with R2, the camera will go through two zoom states. <R 1,3 In Example 6, R 1,3 = 5.641 mm and R2 = 0.718. G1, G2, and G3 further define a range R for varying the focal length of the camera 106 from infinity to 1 meter or 2 meters. AF It can move together with the image sensor at any zoom state. Depending on the zoom state, R AF can be up to 0.4 mm.

[0084] Figure 4G shows the EFL T =EFL Tmin =13mm, F#=F# Tmin =1.8, and TTL T =TTL Tmin4A shows Example 6 in a first zoom state, where the EFL is 19.84 mm. T =EFL Tmax =26mm, F#=F# Tmax = 2.88, and TTL T =TTL Tmax 10 shows Example 6 in a second zoom state where the zoom ratio is 25.85 mm.

[0085] In the first state, G1 is separated from G2 by a distance d7 (the distance between S7 and S8 in Table 22 for an EFL of 13 mm), and G2 is separated from G3 by a distance d13 (the distance between S7 and S8 in Table 22 for an EFL of 13 mm). 13 and S 14 G3 is separated from the window 130 by a distance d17 (for an EFL of 13 mm, the distance is S in Table 22). 17 and S 18 In the second state, G1 is separated from G2 by a distance d7' (the distance between S7 and S8 in Table 22 for an EFL of 26 mm), and G2 is separated from G3 by a distance d13' (the distance between S7 and S8 in Table 22 for an EFL of 26 mm). 13 and S 14 G3 is located at a distance d17' from the window 130 (for an EFL of 26 mm, the distance is S in Table 21). 17 and S 18 distance from the [Table 21] [Table 22] [Table 23] [Table 24] 5A-5E show a schematic diagram of a first embodiment of a telelens and sensor module (or simply "module") designated by the numeral 500. The description of the figures continues with reference to the coordinate system XYZ shown in FIGS. 5A-5E and some other figures. In one example, module 500 has the optical design of the second example. Module 500 includes a VCM-based actuation mechanism for switching lenses 114', 114", 114'", 114"", 114"" and 114""" between zoom and focus states. FIG. 5A shows an EFL module viewed from above at an angle. Tmin 5B shows the module 500 in a simplified form, and FIG. 5B shows the EFL module 500 from another angle on top. Tmin 5C shows the EFL module 500 from an angle on top. Tmax 5D shows the module 500 in a simplified form, and FIG. 5E shows the EFL module 500 from another angle on top. Tmax 5E shows an exploded view of module 500. Module 500 includes a lens assembly 502 ("G1G3 assembly"), a G2 lens assembly 504 ("G2 assembly"), a sensor assembly 506, an electromagnetic (EM) assembly 508, a base assembly 510, a first magnet 512, a first coil 514, a second magnet 516, a first set (illustratively four) of balls 520, and a second set (illustratively four) of balls 522. Lens assemblies 502 and 504 share a lens optical axis 116.

[0086] The first coil 514 is positioned next to the first magnet 512 and is rigidly coupled to the base assembly 510 (i.e., does not move relative to it). The first coil 514 may be soldered to a PCB, such as PCB 822 (FIG. 8), or may be routed to an external circuit (not shown) that allows input and output currents to be sent to the first coil 514, which carry both power and electronic signals necessary for operation. The coil 514 illustratively has a rectangular shape and typically includes several tens of coil windings (i.e., a non-limiting range is 50-250), with a typical resistance of 10-30 ohms. The first magnet 512 is a split magnet, separated into two sides by a central dividing line 512a. On one side of the dividing line 512a, the magnet 512 has a north magnetic pole facing in the positive X direction, and on the other side of the dividing line 512a, the magnet 512 has a south magnetic pole facing in the positive X direction. Driving current through the first coil 514 generates a first Lorentz force on the first magnet 512. In one example, current flowing through the first coil 514 in a clockwise direction induces a first Lorentz force in the positive Z direction on the first magnet 512, and current flowing through the first coil 512 in a counterclockwise direction induces a Lorentz force in the negative Z direction on the first magnet 512. In one example, the first Lorentz force is used to move the lower actuation assembly 560 from a first zoom state to a second zoom state and vice versa in open-loop control, i.e., to actuate the lower actuation assembly 560 between stops 720 a, 720 b and stops 722 a, 722 b (see below).

[0087] Figures 6A and 6B show the EFL TminFIG. 6C shows two bottom perspective views of the actuating portion of module 500, showing upper actuating assembly 550 and lower actuating assembly 560 in their respective positions. FIG. 6C shows upper actuating assembly 550 from a bottom angle. Upper actuating assembly 550 includes G2 assembly 504, second magnet 516, and multiple stepping magnets 626. Lower actuating assembly 560 includes G1 / G3 assembly 502, first magnet 512, stepping magnet 628, and four yokes 602a, 602b (FIG. 6B) and 604a, 604b (FIG. 6A). FIG. 7 shows details of base assembly 510, which includes guide rails 710a and 710b, pull-stop magnets 702a, 702b, and pull-stop magnets 704a, 704b. For illustrative purposes, in FIG. 7, pull-stop magnets 702a, 702b and pull-stop magnets 704a, 704b are separated from stops 720a, 720b and stops 722a, 722b. Arrows indicate the attachment positions of pull-stop magnets 702a, 702b and pull-stop magnets 704a, 704b to stops 720a, 720b and stops 722a, 722b. Yokes 602a, 602b are pulled toward pull-stop magnets 702a, 702b, and yokes 604a, 604b are pulled toward pull-stop magnets 704a, 704b. Each of guide rails 710a, 710b includes a respective groove 712a, 712b. Base assembly 510 further includes two mechanical stops 706 and 708, illustratively connected to guide rail 710b. Mechanical stops 706 and 708 limit the stroke of upper actuation assembly 550. Figure 8 shows details of EM assembly 508 on PCB 822.

[0088] In one example, module 500 allows relative movement of lens assemblies 502 and 504 in a direction along lens optical axis 116. Module 500 has exemplary length / width / height dimensions in the range of 3-40 mm. That is, module 500 has dimensions of 3x3x3 mm. 3 ~40x40x40mm 3In one example, module 500 has a height (along the Y-axis) limited by the maximum clear aperture of lens elements L1-LN plus the plastic thickness of each lens assembly 502 and 504 (e.g., the plastic thickness is in the range of 0.5-1.5 mm), plus the thickness of shield 107 (e.g., the shield thickness is in the range of 0.1-0.3 mm), plus the thickness of two air gaps between each lens assembly 502 and 504 and shield 107 (e.g., the air gap thickness is in the range of 0.05-0.15 mm). The clear apertures of lens elements L1-LN may be circular clear apertures or cut-lens clear apertures, as described below.

[0089] In module 500, the three lens groups (G1, G2, and G3) are held in two lens subassemblies: a G1G3 assembly (502) and a G2 lens assembly (504). Lens assemblies 502 and 504 are typically made of plastic. In some embodiments, lens assembly 502 and G1 and G3 may be manufactured as a single part (similarly, lens assembly 504 and lens group G2 may be manufactured as a single part). In some embodiments, they may be separate parts. Lens assemblies 502 and 504 may be manufactured, for example, by plastic molding or alternatively by other methods. A first magnet 512 and a second magnet 516 are fixedly attached (e.g., glued) to lens assemblies 502 and 504, respectively, on opposite sides transverse to lens optical axis 116 (in the X direction).

[0090] The lens assembly 502 includes several grooves that define a mechanical ball guide mechanism and allow actuation on a linear rail for zooming needs. In this example, six grooves are described, but a different number of grooves may be used: two grooves 542a and 542b (FIG. 5E) on the top surface of the lens assembly 502 along the Z direction, and four grooves 624a-624d (FIG. 6A) on the bottom surface of the lens assembly 502, also along the Z direction. The lens assembly 504 includes several grooves that mate with some of the grooves in the lens assembly 502. In the illustrated embodiment, the lens assembly 504 includes four grooves 642a-642d, only three of which are visible in FIG. 6C. The grooves 642a-642d are parallel to each other, aligned along the Z axis (optical axis), and are used to guide the upper actuation assembly 550 along the Z direction.

[0091] The upper actuation assembly 550 is positioned above the lower actuation assembly 560 such that the grooves 642a, 642b (642c, 642d) are directly above and parallel to the groove 542a (542b).

[0092] In the illustrated embodiment, four balls 520 are positioned at the top of grooves 542a, 542b (two balls at the top of each groove) and at the bottom of grooves 642a-642d (FIG. 6C), separating lens assembly 502 and lens assembly 504 to prevent the two components from contacting each other. In other embodiments, module 500 can have more than four balls between lens assembly 502 and lens assembly 504, for example, up to seven balls per side, or up to 14 balls total. Balls 520 can be made from aluminum oxide or other ceramic material, metal, or plastic material. Typical ball diameters can be in the non-limiting range of 0.3 to 1 mm. For other ball sizes and positioning considerations, see "Rotational Ball Guided The present application may be similar to commonly owned International PCT Patent Application No. PCT / IB2017 / 052383 entitled "Patent Document No. PCT / IB2017 / 052383," entitled "Patent Document No. PCT / IB2017 / 052383."

[0093] Because lens assemblies 502 and 504 are illustratively molded from plastic, there is a certain tolerance in the component dimensions, typically a few tens of microns or less for each dimension. This tolerance can lead to misalignment between adjacent (opposing) grooves 542a, 542b and grooves 642a-642d. To better align the grooves, some grooves (e.g., 542a, 542b and 642c, 642d) may be V-shaped, i.e., have a V-cross-sectional shape to ensure ball positioning, while grooves 642a, 642b may have a wider, trapezoidal cross-section. Groove 542b and grooves 642c, 642d are aligned during assembly, but the alignment of groove 542a and grooves 642a, 642b has a small gap due to the latter groove's trapezoidal cross-section. The trapezoidal groove cross section is merely exemplary, and other groove cross section shapes (e.g., rectangular, flat, etc.) may be used, resulting in one pair of grooves being well aligned due to the groove shape, while another pair of grooves may be aligned but with a gap.

[0094] The design presented herein allows for precise alignment of the three lens element groups. Lens element groups G1 and G3 are well aligned with each other because they are mechanically fixed to the same part, allowing the alignment to be maintained throughout the product's lifecycle. In some embodiments, lens assembly 504 is molded as a single part, and alignment of lens element groups G1-G3 is based on plastic molding tolerances. In some embodiments, lens assembly 504 is molded as several parts that are bonded together at the factory using active or passive alignment procedures. Lens element group G2 is aligned to lens element groups G1 and G3 using a single groove pair (542b and 642c and / or 642d), i.e., lens assemblies 502 and 504 are aligned with each other without an intermediate part.

[0095] Four balls 522 are positioned in the upper portions of grooves 712a, 712b (two balls in the upper portion of each groove) and in the lower portions of grooves 624a-624d; the balls 522 separate lens assembly 502 from base assembly 510, preventing the two components from contacting each other. In other embodiments, module 500 can have more than four balls, for example, up to seven balls per side, or up to 14 balls total. The size, material, and other considerations for balls 522 are similar to those for ball 520. Other considerations for grooves 712a, 712b, and 624a-624d are similar to those for grooves 542a, 542b, and 642a-642d, as described above.

[0096] Module 500 further includes several ferromagnetic yokes 716 ( FIG. 7 ) fixedly attached (e.g., glued) to base assembly 510, each yoke positioned below (along the Y direction) three of stepping magnets 626 and 628. In other embodiments, ferromagnetic yokes 716 may be a fixed part of shield 107. In still other embodiments, shield 107 itself may be made of ferromagnetic material, or the bottom of shield 107 may be made of ferromagnetic material, such that the yokes are part of the shield. Each ferromagnetic yoke 716 pulls on some of stepping magnets 626 or 628 with a negative Y-direction magnetic force; therefore, all yokes prevent both upper actuation assembly 550 and lower actuation assembly 560 from disengaging from each other and from base 510 and shield 107. Balls 520 prevent upper actuation assembly 550 from contacting lower actuation assembly 560, and balls 522 prevent lower actuation assembly 560 from contacting base assembly 510. Thus, both the upper actuation assembly 550 and the lower actuation assembly 560 are confined along the Y-axis and do not move in the Y-direction. The groove and ball structure further confines the upper actuation assembly 550 and the lower actuation assembly 560 to move only along the lens optical axis 116 (Z-axis).

[0097] 7 shows details of base assembly 510 and fixed rails within module 500. Along the Z direction, upper actuation assembly 550 is constrained to move a distance between mechanical stops 706 and 708 equal to the required stroke of lens element group G2 between them (approximately 1-3 mm). Also along the Z direction, lower actuation assembly 560 is constrained to move between mechanical stops 720a, 720b and 722a, 722b and / or between pull-stop magnets 702a, 702b and 704a, 704b.

[0098] FIG. 8 shows details of the EM assembly 508 within the module 500. The EM assembly 508 includes a second coil 818, two Hall bar elements (“Hall sensors”) 834a and 834b, and a PCB 822. The second coil 818 and the Hall bar elements 834a, 834b may be soldered (each individually) to the PCB 822. The second coil 818 illustratively has a rectangular shape and typically includes several dozen coil windings (e.g., a non-limiting range of 50 to 250), with a typical resistance of 10 to 40 ohms. The PCB 822 allows input and output currents to be sent to the second coil 818 and the Hall bar elements 834a, 834b, which carry both power and electronic signals necessary for operation. The PCB 822 may be electronically connected to an external camera by wires (not shown). In one example ( FIG. 5E ), the EM assembly 508 is positioned next to a second magnet 516. The second magnet 516 is a split magnet separated into two sides by a dividing line 516 a down the middle; on one side of the dividing line 516 a, the magnet 516 has a north magnetic pole facing in the positive X direction, and on the other side of the dividing line 516 a, the magnet 516 has a south magnetic pole facing in the positive X direction. Driving a current through the second coil 818 generates a Lorentz force on the second magnet 516. In one example, a current flowing through the second coil 818 in a clockwise direction induces a Lorentz force on the second magnet 516 in the positive Z direction, and a current flowing through the second coil 818 in a counterclockwise direction induces a Lorentz force on the second magnet 516 in the negative Z direction.

[0099] The Hall bar elements 834a, 834b are designed to measure the magnetic field in the X direction (intensity and sign) at the center of each Hall bar element. The Hall bar elements 834a, 834b can detect the strength and direction of the magnetic field of the second magnet 516. In one example, the positioning of the Hall bar element 834a on the PCB 822 is as follows: 1. In the X direction, both Hall bar elements 834a and 834b are separated from the magnet 516 by a distance (e.g., 0.1-0.5 mm), and the distance is constant while the magnet 516 is moving due to the need for zoom or focus. 2. When the system is in the first zoom state (EFLT=15 mm), the Hall bar element 834a is closest to the dividing line 516a along the Z direction. For example, for all focus positions in the first zoom state (macro-continuously from infinity to 1 meter), the Hall element 834b is R along the Z direction from the dividing line 516a. AF It is far away. 3. The system is in the second zoom state (EFL T = 30 mm), the Hall bar element 834b is closest to the dividing line 516a along the Z direction. For example, for all focus positions in the first state zoom (macro continuously from infinity to 1 meter), the Hall element 834b is located at R AF It is far away.

[0100] In such a positioning scheme, when the system is in the first zoom state, the Hall bar elements 834a can measure the position of each of the second magnets 516 along the Z direction, because in the first zoom state, the magnetic field in the X direction is R between the infinity focus position and the 1 meter focus position. AF, the magnetic field in the X direction can be correlated to position. In addition, when the system is in the second zoom state, the Hall bar elements 834b can measure the position of each of the second magnets 516 along the Z direction because in the second zoom state, the magnetic field in the X direction has a measurable gradient along the R AF , which has a measurable gradient on the trajectory of the Hall bar 834b along the X axis, and the magnetic field in the X direction can be correlated to position. Control circuitry (not shown) can be implemented in an integrated circuit (IC) to control the position of the second magnet 516 relative to the EM assembly 508 (and the base assembly 510 to which the EM assembly 508 is rigidly coupled) in a closed-loop manner while operating in either zoom state, and in an open-loop manner while moving between zoom states (see FIG. 10 and the description below). In some cases, the IC can be combined with one or both of the Hall elements 834a, 834b. In other cases, the IC can be a separate chip that can be located outside or inside the module 500 (not shown). In an exemplary embodiment, all electrical connections required by the module 500 are connected to the EM assembly 508, which is stationary relative to the base assembly 510 and the outside world. Therefore, no current needs to be transmitted to any moving parts.

[0101] The magnetoelectric design of module 500 enables the following operational method for operating articulated telecamera 103. FIG. 10 is a flowchart illustrating such an exemplary method. In step 1002, telecamera 103 is positioned with lens 114 in one (e.g., a first) zoom state. In step 1004, a decision is made (by a user or an algorithm) to refocus telelens 114, and closed-loop control (by a controller, not shown) uses input from Hall bar element 834a to move G2 assembly 504 and move telecamera 103 to another focus position in the first zoom state. In step 1008, a decision is made (by a user or an algorithm) to change the zoom state of lens 114 of camera 103 to another (e.g., a second) zoom state, and open-loop control moves G1G3 assembly 502 to mechanical stop 720 in step 1010, followed by open-loop control of G2 assembly 504 to mechanical stop 706 in step 1012. Thereafter, in step 1014, the G2 assembly 504 is moved using closed-loop control with input from the Hall bar element 834b to move the tele-articulated camera 103 to a second zoom state and another focus position in step 1016. A decision is made to refocus the lens 114 in step 1018. The lens 114 is refocused in the second zoom state by moving the G2 assembly using closed-loop control with input from the Hall bar element 834b. In step 1020, a decision is made (by a user or an algorithm) to change the second zoom state of the lens 114 of the camera 103 to the first zoom state, and in step 1022, the G1G3 assembly 502 is moved using open-loop control to mechanical stop 722, followed by the G2 assembly 504 being moved using open-loop control to mechanical stop 708 in step 1024.

[0102] In some embodiments, any lens element L i Two faces of S 2i-1 , S 2ihas two apertures containing two cuts (facets). In such a case, the lens element L i are referred to as "cut lens elements." The cuts allow the lens assembly to be lowered and / or shortened. In one example, FIG. 9A shows a lens assembly with axial symmetry and height H 902 9B shows a lens element 902 having two cuts 906 and 908 and a height H 904 9. Lens elements 902 and 904 have the same diameter D. Clearly, H 904 <H 902 In the example shown in Figure 5, the first two lens elements (L1 and L2) are cut lens elements.

[0103] As explained below, the surface S k (1≦k≦2N) for each clear height value CH(S k ) can be defined, and the surface S k (1≦k≦2N) for each clear aperture value CA(S k ) can be defined. CA(S k ) and CH(S k ) is the surface S of each lens element. k Define the optical properties of

[0104] As shown in Figs. 11A, 11B, and 12, the surface S k Each ray passing through (1≦k≦2N) strikes an impact point IP. If a ray enters the lens module (e.g., 114′, 114″, 114′″) from surface S1 and strikes surface S2, the ray will strike surface S3. 2N Some rays pass through any surface S k , but cannot / does not reach the image sensor 118. k For , only rays that can form an image on the image sensor 118 are considered to form multiple impact points IP. k ) is the orthogonal projection IP of all impact points IP on the plane P. orthis defined as the distance between two parallel lines that are as close as possible (see lines 1200 and 1201 in FIG. 12) so that CH(S) is located between the two parallel lines (see lines 1200 and 1201 in FIG. 12). (In FIGS. 11A and 11B, plane P is parallel to plane XY and perpendicular to optical axis 116). k ) is the surface S k (front and rear surfaces, 1≦k≦2N) can be specified.

[0105] CH(S k The definition of ) is independent of the object currently being imaged, as it refers to light rays that can "form" an image on the image sensor. Thus, even if the object currently being imaged is located against a black background that does not produce light, any light rays that can "reach" the image sensor to form an image (e.g., as opposed to a black background that emits light) are considered to be light rays that can "reach" the image sensor to form an image. The above definition does not refer to this black background, since it refers to light emitted by the background emitting light.

[0106] For example, FIG. 11A shows an orthogonal projection IP of two impact points IP1 and IP2 on a plane P perpendicular to the optical axis 116. orth,1 , IP orth,2 For example, in FIG. 11A, the surface S k is convex.

[0107] Figure 11B shows the orthogonal projection IP of the two impact points IP3 and IP4 on the plane P. orth,3 , IP orth,4 For example, in FIG. 3B, the surface S k is concave.

[0108] In Figure 12, surface S on plane P k Orthogonal projection IP of all impact point IPs orth is located between the parallel lines 1200 and 1202. Therefore, CH(S k ) is the distance between line 1200 and line 1202.

[0109] Attention is now directed to FIG. 13. In accordance with the subject matter of this disclosure, a clear aperture CA(S k) is the diameter of a circle, and the k (1≦k≦2N), where the circle is perpendicular to the optical axis 116 and is the sum of all orthogonal projections IP of all impact points on the plane P. orth is the smallest circle in the plane P that encloses CH(S k As mentioned above for CA(S k Note that the definition of ) is also independent of the object currently being imaged.

[0110] As shown in Figure 13, the circumscribed orthogonal projection IP of all impact points IP on the plane P orth is a circle 1300. The diameter of this circle 1300 is CA(S k ) is specified.

[0111] In conclusion, the zoom camera disclosed herein is designed to overcome specific optical challenges as follows.

[0112] -EFL Tmax >1.8×EFL Tmin or EFL Tmax >1.5×EFL Tmin lens design ensures that the user experiences a significant difference in optical zoom when switching between the multiple zoom states.

[0113] In some embodiments (e.g., Example 1), TTL Tmax <EFL Tmax In some embodiments (e.g., Examples 2 and 3), TTL Tmax <0.9×EFL Tmax Such a lens design can reduce the length of the camera (along the Z axis).

[0114] In some embodiments (Examples 1-3), the first lens element has a clear aperture (diameter of S1) that is larger than the clear apertures of all other lens elements. In some embodiments (Module 500), the first lens has a first lens that is a cut lens element (see FIG. 9). Advantageously, such a lens design helps achieve a small camera height.

[0115] -Changes in zoom state are caused by no more than two actual movements of the lens groups. That is, to change the zoom state, some lens element groups move together within a first range of movement, some of the remaining lens element groups move together within a second range of movement, while all other lens element groups remain stationary. This simplifies the control and design of the actuator, as only two mechanical elements need to be moved and controlled.

[0116] -In some cases, F# Tmin <1.5×F# Tmax ×EFL Tmin / EFL Tmax In some cases, F# Tmin <1.2×F# Tmax ×EFL Tmin / EFL Tmax Such a lens design can achieve a low F# right from the start.

[0117] In some examples, for any lens element group, the movement from the first zoom state to the second zoom state is less than 0.75×(EFL Tmax -EFL Tmin In some examples, for any lens element group, the movement from the first zoom state to the second zoom state is less than 0.6×(EFL Tmax -EFL Tmin ) Such a lens design may limit the movement of the lens elements and / or simplify actuation.

[0118] Focusing can be achieved by additional movement of one of the lens elements that move together for zoom state changes, which allows for simpler actuator design and improved control.

[0119] With respect to the properties of the lenses disclosed herein: -Three lens groups in the lens design minimize lens complexity. A lens design having lens groups with positive, positive, and negative powers (from the object side) can reduce the movement of the lens groups to change the zoom state. In one example of a process for changing the zoom state (Example 1), the first lens element group G1 moves a first amount, the third lens element group G3 moves a second amount, and the second lens element group G2 does not move. The further movement of G3 can be used for focusing. In another example of the process of changing the zoom state (Example 2), G1 moves together with G3 by a first amount, and G2 moves by a second amount. The further movement of G2 can be used for focusing. In yet another example (Example 3) of the process of changing the zoom state, G1 moves by a first amount, G3 moves by a second amount, and G2 does not move. The additional movement of the first G1 can be used for focusing. In yet another example (Example 4) of the process of changing the zoom state, G1 moves together with G3, and G2 does not move. The additional movement of the first G2 can be used for focusing. In yet another example (Example 5) of the process of changing the zoom state, G1 moves together with G3 and G2 does not move. Further movement of G1 together with G3 can be used for focusing. In yet another example of a process for changing the zoom state (Example 6), G1 moves together with G3 by a first amount, and G2 moves by a second amount. The further movement of all three lens groups together (and thus the movement of G1, G2, and G3 together) can be used for focusing.

[0120] Table 25 summarizes the movements in each example, with exemplary movement ("stroke") ranges. [Table 25] The examples shown in Table 25 where multiple lens groups are shown as moving for focusing may refer to designs where the lens groups defined in Table 25 move together as a unit for focusing. In some embodiments (e.g., Examples 5 and 6), moving several lens groups together may be facilitated by rigidly coupling each lens group.

[0121] The values ​​shown for G1 Range, G2 Range, and G3 Range refer to the maximum range of overall movement of the lens group relative to the image sensor.

[0122] The value shown in the "AF Maximum Range" row refers to the maximum range of movement of the lens group relative to the image sensor defined in the "Groups Shifted for Focus" row required to focus between infinity and 1 meter or 2 meters according to the associated table, Table 2, Table 6, Table 10, Table 14, Table 18, or Table 22 (see above). In most embodiments, the AF Maximum Range is greater at higher zoom states, i.e., EFL Tmax is given by the movement of the lens group to a state with

[0123] In some embodiments, G1 and G3 may be stationary, ie, they do not move, while G2 may be moved to change the zoom state.

[0124] FIG. 14 schematically illustrates an embodiment of an electronic device, generally designated 1400, including a multi-aperture camera having at least one multi-zoom state camera as disclosed herein. The electronic device 1400 includes a first camera module 1410 including an OPFE 1412 and a first lens module 1414 that forms a first image recorded by a first image sensor 1416. A first lens actuator 1418 can move the lens module 1414 for focusing and / or optical image stabilization (OIS) and / or to change between two different zoom states. In some embodiments, the electronic device 1400 may further include an application processor (AP) 1440. In some embodiments, the first calibration data may be stored in a first memory 1422 of the camera module, such as an EEPROM (Electrically Erasable Programmable Read-Only Memory). In other embodiments, the first calibration data may be stored in a third memory 1450, such as an NVM (Non-Volatile Memory) of the electronic device 1400. The first calibration data may include one or more subsets of calibration data, such as a first subset including calibration data between the wide camera and telephoto camera sensors at a first zoom state, a second subset including calibration data between the wide camera and telephoto camera sensors at a second zoom state, and / or a third subset including calibration data between the telephoto camera sensor at the first zoom state and the same sensor at the second zoom state. The electronic device 1400 further includes a second camera module 1430 including a second lens module 1432 that forms images recorded by a second image sensor 1434. A second lens actuator 1436 may move the lens module 1432 for focusing and / or OIS and / or to change between two different zoom states. In some embodiments, the second calibration data may be stored in a second memory 1438 of the camera module. In other embodiments, the second calibration data may be stored in a third memory 1450 of the electronic device 1400.The second calibration data may include one or more subsets of the calibration data, for example, as described above.

[0125] In use, a processing unit such as AP 1440 may receive first image data and second image data from camera module 1410 and camera module 1430, respectively, and provide camera control signals to camera modules 1410 and 1430. In some embodiments, AP 1440 may receive calibration data from third memory 1450. In other embodiments, AP 1440 may receive calibration data stored in a first memory disposed on camera module 1410 and a second memory disposed on camera module 1430, respectively. In yet another embodiment, AP 1440 may also receive calibration data stored in the first memory disposed on camera module 1410 and the second memory disposed on camera module 1430, respectively, from third memory 1450 of electronic device 1400. In some embodiments, an electronic device such as device 1400 may include multiple camera modules implemented with a folded lens design and an OPFE. In other embodiments, two or more camera modules may be implemented without an OPFE and with a different lens design rather than a folded lens design. The AP 1440 may access data stored in the third memory 1450. This data may include third calibration data. The image generator 1444 may be a processor configured to output an image based on the calibration data and the image data. The image generator 1444 may process the calibration data and the image data to output an output image.

[0126] The camera calibration data may include: Stereo calibration data between camera modules 1410 and 1430, specifically for all possible combinations of different lenses with different zoom states for, for example, two different zoom states for a telecamera. The stereo calibration data may include six degrees of freedom, for example, pitch, yaw, and roll angles, and eccentricity in the x-, y-, and z-axes. Stereo calibration data between camera module 1410 and camera module 1430, specifically for all possible combinations of different zoom states, for example, two different zoom states of a telecamera. These data may include six degrees of freedom. -Specific camera parameters such as focal length and distortion profile for each camera module and for different zoom states (two different zoom states for a telecamera). -Hall sensor position values ​​that can correspond to different focus positions at each of the different zoom states (e.g., infinity, 1m, and closest focus). - Lens shading profiles of the lens module for each of the different zoom states.

[0127] FIG. 15A shows a schematic diagram of an embodiment of a dual-aperture zoom camera with autofocus, designated 1500, in a full isometric view and a cross-sectional isometric view. Camera 1500 includes two camera modules, designated 1502 and 1504, each with its own optics. Thus, camera module 1502 includes an optics block 1506 with an aperture 1508 and an optical lens module 1510, as well as a sensor 1512. Similarly, camera module 1504 includes an optics block 1514 with an aperture 1516 and an optical lens module 1518, as well as a sensor 1520. Each optical lens module may include several lens elements, as well as infrared (IR) filters 1522a and 1522b. If desired, some or all of the lens elements belonging to different apertures may be formed on the same substrate. The two camera modules are positioned adjacent to each other, with a baseline 1524 between the centers of the two apertures 1508 and 1516. Each camera module may further include an auto-focus (AF) mechanism and / or a mechanism for optical image stabilization (OIS), 1526 and 1528, respectively, controlled by a controller (not shown).

[0128] FIG. 15B schematically illustrates an embodiment of a zoom and autofocus dual aperture camera 1530 with a folded telelens in a cross-sectional isometric view relative to an XYZ coordinate system. The camera 1530 comprises two camera modules: a wide camera module 1532 and a tele camera module 1534. The wide camera module 1532 includes a wide optics block with a respective aperture 1538, a lens module 1540 with a symmetry (and optical) axis 1542 in the Y direction, and a wide image sensor 1544. The tele camera module 1534 includes a tele optics block with a respective aperture 1548, an optical lens module 1550 with a telelens symmetry (and optical) axis 1552a, and a tele image sensor 1554. The camera 1530 further comprises an OPFE 1556. A tele optical path extends from an object (not shown) through the telelens to the tele sensor and is represented by arrows 1552b and 1552a. The various camera elements may be mounted on a substrate 1562, such as a printed circuit board (PCB), as shown here, or on a different substrate (not shown).

[0129] 15C schematically illustrates an embodiment in a full isometric view of a zoom and autofocus triple aperture camera 1570 with one folded telecamera module 1534. Camera 1570 includes, for example, the elements and functions of camera 1530. That is, camera 1570 includes wide camera module 1532, telecamera module 1534 with OPFE 1556. Camera 1570 further includes a third camera module 1572, which may be an ultra-wide camera with ultra-wide lens 1574 and image sensor 1578. In other embodiments, third camera module 1572 includes an EFL intermediate those of the wide camera module and the telecamera module. M and FOV MThe third camera module's axis of symmetry (and optical) 1576 is substantially parallel to the axis 1542 of the camera module 1532. Note that although the first and third camera modules are shown in a particular arrangement (with the third camera module 1572 closer to the tele camera module 1534), this order may be changed so that the wide and ultra-wide camera modules can swap places.

[0130] 16A-H schematically illustrate a second embodiment of a telelens and sensor module disclosed herein and designated 1600. Module 1600 has the optical design of Example 6 of Table 25. Module 1600 includes an actuator 1610 for changing between the zoom states (also referred to as "EFL switching") of lenses 114', 114", 114'", 114"", 114"", and 114""". FIG. 16A illustrates the minimum EFL (EFL) from a top perspective view. Tmin ) and FIG. 16B shows the module 1600 at maximum EFL (EFL) from a top perspective view. Tmax ) from a top perspective. Tmin 16D shows a schematic representation of a portion of module 1600 in an EFL state, from a top perspective. Tmax FIG. 16E shows a schematic representation of a portion of module 1600 in an EFL state. Tmin 16A and 16B show a schematic side view of a portion of module 1600 in the EFL state. Tmax 16G and 16H show a schematic side view of a portion of module 1600 in the EFL state. Tmin 16 shows a schematic representation of a portion of a module 1600 in a state.

[0131] The module 1600 includes a G1G3 assembly 502, a G2 assembly 504, a sensor assembly 506, a module housing 1612, a lens frame 1618, four shape memory alloy (SMA) springs arranged in two pairs 1602a and 1602b, two mechanical (conventional) springs 1604a, b, G2 stops 1614a, 1614b and 1616a, 1616b, and an AF actuation mechanism 1620. The G2 lens stops 1614a, b and 1616a, b may limit the displacement of the lens group G2 toward the object (image sensor 506) side of the module 1600. The actuator 1610 includes the SMA springs 1602 and the mechanical (conventional) springs 1604. Exemplary dimensions of the SMA spring 1602 include a spring diameter of 0.5 mm, a wire diameter of 0.05 mm, and several tens of coil turns. The force that such a spring can generate is on the order of several grams. Considering the module 1600 viewed from above (e.g., module 1600 in FIGS. 16C and 16D ), a pair of SMA springs (1602 a) and one mechanical spring 1604 a are located on the right-hand side of the lens assembly, and a pair of SMA springs (1602 b) and one mechanical spring 1604 b are located on the left-hand side of the lens. Springs 1602 a (1604 a) and 1602 b (1604 b) are positioned symmetrically on either side of the module with respect to the optical axis 116. Springs 1602 a (1604 a) and 1602 b (1604 b) may have identical characteristics. The G1G3 assemblies 502 and G3 504 share the lens optical axis 116. The module 1600 may include a top cover, which is not shown here for visibility reasons.

[0132] The two lens groups of the G1G3 assembly are fixedly connected to each other via two pins or rods 1606 ( FIG. 16B ) so that the distance between them along the optical axis 116 is constant. The assembly, including G1, G3, and rod 1606, is referred to herein as the “G13 assembly.” Rod 1608 is parallel to the optical axis 116 and runs the entire length of the lens frame 1618. Rod 1608 guides the movement of lens groups G1+G3 and G2, which move by sliding on rod 1608. G2 can “float” on rod 1608 between G2 stops 1614 a and 1616 a on one side of the module 1600 and between G2 stops 1614 b and 1616 b on the other side of the module 1600. The G13 assembly is movable relative to the module housing 1612 and the image sensor 506 to provide two effective focal lengths EFL Tmin and EFL Tmax Displacement of the G13 assembly along the optical axis 116 toward and away from the image sensor 506 is accomplished via an SMA spring and a mechanical spring. The two SMA springs in each spring pair 1602 may be parallel to each other and to the optical axis 116 and may be connected such that one end is fixed to G3 and the other end is fixed to the lens frame 1618. One end of the mechanical spring 1604 (also parallel to the optical axis 116) may be fixed to G1 and the other end may be fixed to the lens frame 1618.

[0133] Based on known SMA properties and effects, displacement of the G13 assembly toward and away from the image sensor 506 can be induced as follows: when heated, the SMA springs 1602 contract, significantly increasing their internal stress, resulting in a large compressive force. Conversely, when cooled, their internal stress decreases significantly, resulting in a small compressive force. Thus, heating the SMA springs 1602, for example, by driving current through them, can control their compressive force to overcome the opposing compressive force of the mechanical springs 1604, resulting in displacement of the G13 assembly away from the image sensor 506. In contrast, relaxing the SMA springs to ambient temperature (e.g., 60°C), typically accomplished by turning off the current supply, causes the compressive force of the mechanical springs 1604 to overcome the force of the SMA springs 1602, resulting in displacement of the G13 assembly toward the image sensor 506.

[0134] 16G and 16H show details of AF actuation mechanism 1620. Mechanism 1620 is used to focus a camera such as camera 103. Mechanism 1620 includes two coils 1622a and 1622b, a magnet assembly 1624 fixedly coupled to frame 1618, and a Hall sensor 1626, which may be soldered to a PCB (not shown in FIGS. 16G and 16H). The coils have flat bottom and top surfaces lying substantially in the YZ plane, and the coils are aligned relative to one another along the Z direction (parallel to the lens optical axis and the direction of movement of G1, G2, and G3). The coupling allows input and output currents to be sent to coils 1622a and 1622b, which carry both power and electronic signals necessary for operation. Hall sensors 1626 may be fixedly coupled to module housing 1612 (the latter not shown in FIGS. 16G and 16H) and are used to determine the position of lens frame 1618 relative to module housing 1612 and image sensor 506. Magnet assembly 1624 includes two split magnets 1624a and 1624b, each with two polarizations that are orthogonal to each other and normal (anti-normal) to the magnet surface. Details of split magnets similar to those in magnet assembly 1624 (and their function in the VCM) are described above for magnet 512 in FIGS. 5A-E. The polarizations are indicated by hatching of the relevant regions of 1624a and 1624b, respectively. Focusing is achieved by driving current through coils 1622a and 1622b.

[0135] 17A-D show a schematic diagram of a third embodiment of a telelens and sensor module disclosed herein and designated as 1700. Similar to module 1600, module 1700 has the optical design of Example 6 of Table 25. FIG. 17A shows the EFL from a top perspective view. Tmin 17B shows a schematic diagram of the module 1700 in the EFL state from a top perspective. Tmax 17C shows a schematic diagram of the module 1700 in the EFL state from a top perspective.Tmax 17A and 17B schematically illustrate portions of module 1700 in a phantom state, and FIG. 17D schematically illustrates portions of module 1700 in a phantom state.

[0136] Module 1700 includes a VCM mechanism 1710 for changing between zoom and focus states of lenses 114′, 114″, 114′″, 114′″, 114′′″, 114′′′′, 114′′″. Module 1700 further includes a G1G3 assembly 502, a G2 assembly 504, a sensor assembly 506, a module housing 1612, and a lens frame 1706. VCM mechanism 1710 includes two VCMs 1710a and 1710b on each side of the module and two G2 lens stops 1702 and 1704. Lens stops 1702 and 1704 may limit displacement of G2 toward the object (image sensor 506) side of module 1700. Considering module 1700 from a top view (e.g., as shown in FIGS. 17C and 17D from two opposite sides), VCMs 1710a and 1710b may have identical structures and characteristics. Lens assemblies 502 and 504 share lens optical axis 116. Module 1700 may include a top cover, which is not shown here for visibility reasons.

[0137] VCM mechanism 1710 includes two coil assemblies 1730a and 1730b and two magnet assemblies 1720a and 1720b, which are components of VCMs 1710a and 1710b, respectively. The coil assemblies and magnet assemblies 1720a and 1720b are located on opposite sides of the module, symmetrically about optical axis 116. However, VCMs 1710a and 1710b differ from each other with respect to the number and location of Hall sensors, as described below. 17A-17D, coil assemblies 1730a and 1730b each include four coils 1730c, 1730d, 1730e, and 1730f (see also FIG. 17C), and magnet assemblies 1720a and 1720b each include two magnets 1720c, 1720d, each having two polarizations (see also FIG. 17D). Magnet assembly 1720a is positioned on one side of the module (e.g., the side facing away from the viewer), and magnet assembly 1720b is positioned on the other side of the module (i.e., the side facing towards the viewer).

[0138] In FIGS. 17A and 17B, certain portions of the housing 1612 (i.e., the outer wall) that would otherwise encase the VCM mechanism 1710 are not shown for clarity and visibility reasons. FIG. 17C shows the module 1700 without the housing 1612 to highlight the VCM mechanism 1710. FIG. 17D shows the module 1700 without the housing 1612 and without the coil assembly 1730 to highlight the magnet assembly 1720 of the VCM mechanism 1710. The coil assembly 1730 may be fixed (e.g., soldered) to a PCB (not shown in FIG. 17C) that allows input and output currents to be sent to the coils within the coil assembly 1730. The currents carry both power and electronic signals necessary for operation. The PCB may be fixedly coupled (e.g., adhesively bonded) to the housing 1612, and the magnet assembly 1720 is fixedly coupled to the lens frame 1706.

[0139] 17E shows a magnet assembly 1720. The magnet assembly 1720 may comprise a single magnet with four alternating polarizations, indicated by arrows pointing in different directions, with the polarizations oriented normal (or anti-normal) to the surface of the magnet. Alternatively, for example, to reduce manufacturing complexity, the single magnet with four polarizations may be replaced with a magnet subassembly 1720' that includes two magnets with two polarizations, as indicated by the arrows.

[0140] Figure 17F shows the EFL Tmin State and the EFL Tmax 17E shows a schematic diagram of how VCMs 1710a and 1710b operate between states. The magnetic sub-regions within the magnet shown in FIG. 17E are indicated by hatching. VCMs 1710a and 1710b operate by driving current through different coils in a known and predetermined sequence. For example, to conduct the magnet along the z-axis (towards increasing values ​​of z), the following sequence may be performed (see FIG. 17F for coil numbering 1-4): [Table 26] VCMs 1710a and 1710b represent large stroke VCMs. The stroke size (see Table 25) is determined by the number of coils, but not the size of the magnet. Furthermore, there is no upper limit to the stroke size. That is, unlike typical VCM configurations where the magnet size must be increased to increase the stroke, for a given magnet, a larger stroke can be achieved simply by adding more coils to the VCM. Theoretically, infinite stroke can be achieved by adding an infinite number of coils.

[0141] In a VCM, the magnet is typically part of the dynamic mechanism, while the coil is static. Typically, the magnet constitutes the majority of the mechanism's mass. As a result, achieving fast settling times and keeping the magnet volume small are major concerns. Therefore, the VCM configuration shown in Figures 17A-17J presents a solution that maintains a small magnet mass while introducing a large stroke. For example, using this configuration, a stroke of ~7 mm can be achieved by using a single ~11 mm long magnet. By comparison, to achieve a 7 mm stroke using one magnet and one coil (rather than four as in our description), the magnet must be ~17 mm long.

[0142] Figures 17G and 17H show EFL Tmin State and EFL Tmax 17 shows a side view of one method of actuation for effecting switching of the zoom states of VCMs 1710a and 1710b in the EFL 1612. Hall sensors 1708 (partially removed here to expose actuator 1710) fixedly coupled to module housing 1612 actuate the EFL 1612. Tmin State and the EFL Tmax determines the position of the module frame 1706 relative to the module housing 1612 for controlled switching between the ON and OFF states.

[0143] Figures 17I and 17J show EFL Tmin State and EFL Tmax The actuator modes of VCMs 1710a and 1710b are shown in side views opposite to those in Figures 17G and 17H. Hall sensors 1712 and 1714 are fixedly coupled to module housing 1612 and determine the position of module frame 1706 relative to module housing 1612 for focusing camera 103. The EFL as shown in Figure 17I TminIn this state, the position of the module frame 1706 relative to the module housing 1612 is determined by the Hall sensors 1714. Tmax In this state, the position of the module frame 1706 relative to the module housing 1612 is determined by the Hall sensors 1712 .

[0144] To control the stroke for switching the zoom state, one Hall sensor on one side of the housing can be used (see Figures 17G and 17H). To control the stroke for focusing, the EFL Tmin When the EFL is in the ON state, the Hall sensor 1714 is used. Tmax When the Hall sensor 1712 is in this state, the Hall sensor 1712 may be used (FIGS. 17I and 17J).

[0145] 18A and 18B show the EFL Tmin 18 shows a perspective view of one embodiment of an adhesion subsystem 1810 for adhering (magnetically coupling) G2 to G1 in the zoom state. The adhesion subsystem 1810 may include four yokes 1814a, 1814b, 1814c, and 1814d and four magnets 1816a, 1816b, 1816c, and 1816d. Adhesion of G2 to G1 is achieved solely by the adhesion subsystem 1810 and without a specific actuator, e.g., without a VCM.

[0146] Figures 18C and 18D show EFL Tmax 18 shows another embodiment of an adhesion subsystem 1820 for adhering G2 to G3 in the zoom state shown in FIG. 18. The adhesion subsystem 1820 may include four yokes 1824a, 1824b, 1824c, and 1824d and four magnets 1826a, 1826b, 1826c, and 1826d. Adhesion of G2 to G3 is achieved solely by the adhesion subsystem 1820 and without a specific actuator, e.g., without a VCM.

[0147] Although the adhesion subsystems 1810 and 1820 are based on the attractive force between the magnet and the yoke, creating a dedicated VCM and sensor system for determining the position of G2 may be necessary to achieve autofocus redundancy.

[0148] 19A-19D show a G2 stop removal mechanism 1900. The G2 removal mechanism may be included in module 1600 or in module 1700 to enable a macro photography mode (or "macro mode") as described above. The G2 stop removal mechanism 1900 includes a G2 stop 1906, a mechanical spring 1902b and an SMA spring 1904b, and a mechanical spring 1902a (not visible here) and an SMA spring 1904a (not visible here). The springs 1904a (1902a) and 1904b (1902b) are positioned symmetrically on either side of the module about the optical axis 116.

[0149] Figure 19A shows the EFL Tmax 1 shows a perspective view of the G2 stop removal mechanism 1900 with the G2 stop 1906 activated. By "activated," we mean that a mechanical element or member 1908 (also referred to as a "tongue," as described below) engages (via a spring configuration, as described below) to prevent G2 from moving with G1 or G3. The G2 assembly 504 is magnetically coupled to the G1 / G3 assembly 502, while G2 is magnetically coupled to G3. This configuration may enable telephotography.

[0150] FIG. 19B shows a perspective view of the G2 stop removal mechanism 1900 in macro mode with the G2 stop 1906 deactivated. "Deactivated" means that a mechanical element or member is disengaged and does not impede G2 movement. Here, the G2 assembly 504 is magnetically coupled to the G1 / G3 assembly 502, while the G2 is magnetically coupled to the G1. This state can be used for macro photography. To deactivate the G2 stop, a current is driven through the SMA springs 1904a and 1904b, causing them to heat and compress. Because the compressive force is greater than the contraction force of the mechanical springs 1902a and 1902b, the G2 stop 1906 moves away from the housing 1612 (is removed) on the side of the SMA springs 1904a and 1904b.

[0151] Figure 19C shows the EFL Tmin or EFL Tmax 19D shows a portion of the G2 stop removal mechanism 1900 with the stop 1906 activated. FIG. 19E shows a portion of the G2 stop removal mechanism 1900 with the G2 stop 1906 deactivated. The tongue 1908 is part of the assembly 504 and stops the movement of the G2 assembly 504 when the G2 stop 1906 is activated. EFL Tmin From the state of EFL Tmax When the zoom state is switched to the , G2 is disconnected from G1 and connected to G3 toward the end of the zoom switching process, for example, via a magnet-based mechanism as described in Figures 18A-D. The tongue 1908 does not stop the movement of G2 when the G2 stop 1906 is activated, and G2 remains connected to G1. When no further current is driven through the SMA springs 1904a and 1904b, the G2 stop 1906 is again activated.

[0152] In another embodiment, module 1600 or module 1700 or module 1900 may have the optical design of Example 6 of Table 25 and may be usable for macro photography in macro mode. To enter macro mode, lenses 114', 114'', 114''', 114'''', 114'''''', 114'''''', and 114'''''' are EFL Tmin When switching to macro mode, the lens must be in the EFL mode with G2 stops 1906 deactivated. Tmin The lens must then be in a G2 Stop 1906 deactivated EFL Tmax Due to the removal of the G2 lens stop, G2 remains adhered to G1, as shown in FIG. 19B.

[0153] The optical design of Example 6 in Table 25 achieves a maximum macro mode magnification M of, for example, M=0.44, where M refers to the ratio between the size of the image of the object on the image sensor plane and the actual size of the object. This is an approximation of a thin lens.

number

[0154] Successively smaller magnifications M can be chosen down to zero magnification (for an object at infinity). To achieve smaller magnifications, the lens groups must be in the macro mode configuration (defined with G1 cemented to G2) and G1, G2 and G3 must be moved together towards the image sensor.

[0155] For example, a magnification M=0.23 may be desirable. maxTo switch from EFL to M=0.23, the lenses must be configured in macro mode and G1, G2, and G3 must all be moved 3 mm toward the image sensor. Using the thin lens approximation above, when EFL=13 mm and lens-image distance v=16 mm, the object-lens distance u=69 mm, and therefore the magnification M=16 / 69=0.23.

[0156] M max From the state of zero magnification (i.e., M=0), min To switch to state, in macro mode configuration, G1+G2+G3 must be moved together 6 mm towards the image sensor. Then EFL=13 mm and lens-image distance v=13 mm, which translates to M=0.

[0157] While the present disclosure describes a limited number of embodiments, it will be understood that many variations, modifications, and other applications of such embodiments may be made. In general, the present disclosure should not be understood to be limited by the specific embodiments described herein, but rather only by the appended claims.

[0158] All references mentioned herein are incorporated by reference in their entirety to the same extent as if each individual reference was specifically and individually indicated to be incorporated by reference. Furthermore, citation or identification of any reference in this application shall not be construed as an admission that such reference is available as prior art to the present application.

Claims

1. a lens having a plurality of lens elements along a lens optical axis, the lens being divided into at least three lens element groups; An image sensor; an optical path bending element (OPFE); a first actuator for moving two lens element groups of the at least three lens element groups together relative to the image sensor in a direction parallel to the lens optical axis to place the lens in two zoom states; The lens has an effective focal length EFL and an f-number F#, and EFL and F# are each a minimum value EFL in a first zoom state. ｍｉｎ and F# ｍｉｎ to the maximum value EFL in the second zoom state ｍａｘ and F# ｍａｘ It changes to EFL≦40 mm, Ratio EFL ｍａｘ / EFL ｍｉｎ ≧1.5, F# ｍｉｎ ≦2.8 and F# ｍａｘ ≦4, a curved camera.

2. 1.8≦F# ｍｉｎ 2. The folded camera of claim 1, wherein ≦2.

8.

3. 2.8≦F# ｍａｘ 2. The folded camera of claim 1, wherein ≦4.

4. 10. The folded camera of claim 1, further comprising: a second actuator that adjusts focus by moving the plurality of lens elements relative to the image sensor, the second actuator including at least two coils and at least two corresponding magnets, each of the at least two corresponding magnets having a magnetic polarization.

5. one of the plurality of lens elements has a maximum clear aperture height CA that is greater than a clear aperture height of any other lens element; The bending camera has a bending camera height H Ｃ and H Ｃ 2. The folded camera of claim 1, wherein CA+3.9 mm.

6. H Ｃ 6. The folded camera of claim 5, wherein CA+2.5 mm.

7. H Ｃ 6. The folded camera of claim 5, wherein CA is greater than or equal to 1.3 mm.

8. 10. The folded camera of claim 1, further comprising: a second actuator that adjusts focus by moving the plurality of lens elements relative to the image sensor, the second actuator including at least four coils and at least four corresponding magnets, each of the at least four corresponding magnets having a magnetic polarization.

9. 10. The folded camera of claim 1, further comprising: a second actuator that adjusts focus by moving the plurality of lens elements relative to the image sensor, the second actuator including eight coils and eight corresponding magnets, each of the eight corresponding magnets having a magnetic polarization.

10. a second actuator that adjusts a focus by moving the plurality of lens element groups relative to the image sensor; the folded camera receives light from a first direction perpendicular to the lens optical axis; the lens has left and right sides defined along an axis orthogonal to both the lens optical axis and the first direction; The foldable camera of claim 1 , wherein the second actuator is located on both the left and right sides of the lens.

11. the two lens element groups of the at least three lens element groups are fixedly attached to each other by a plurality of rods; another of the at least three lens element groups floats between two stops; moving the two lens element groups of the at least three lens element groups so that in the first zoom state, the other lens element group can be bonded to a first lens element group of the two lens element groups of the at least three lens element groups, and so that in the second zoom state, the other lens element group can be bonded to a second lens element group of the two lens element groups of the at least three lens element groups; 2. The folded camera of claim 1, wherein the further lens element group is guided by the plurality of rods and is movable relative to the plurality of rods along a direction parallel to the lens optical axis.

12. EFL ｍａｘ / EFL ｍｉｎ 10. The folded camera of claim 1, wherein the .lambda.f. is greater than 1.

75.

13. EFL ｍａｘ is in the range of 20 to 40 mm, and EFL ｍｉｎ 2. The folding camera of claim 1, wherein is in the range of 10 to 20 mm.

14. 2. The folded camera of claim 1, wherein a first lens element L1 of the plurality of lens elements faces the object side and has a maximum clear aperture height CA that is greater than the clear aperture height of any other lens element.

15. For any lens element group, movement from the first zoom state to the second zoom state is 0.6×(EFL ｍａｘ -EFL ｍｉｎ 10. The folding camera of claim 1, having a width less than 1 / 2.

16. F# ｍｉｎ <1.5 x F# ｍａｘ ×EFL ｍｉｎ / EFL ｍａｘ 2. The bent camera of claim 1, wherein:

17. The lens has a total track length TTL, and a maximum value of TTL ｍａｘ is TTL ｍａｘ <EFL ｍａｘ The folding camera according to claim 1 , which satisfies the above condition.

18. It is included in the dual camera along with the wide camera module, The wide camera module has an effective focal length of EFL Ｗ a wide lens having an EFL ｍｉｎ >1.5 x EFL Ｗ 18. The bent camera according to claim 1, wherein:

19. 18. The flex camera of any one of claims 1 to 17, wherein the flex camera is contained within a handheld device.

20. 20. The folded camera of claim 19, wherein the mobile device is a smartphone.

Images