Pop-up wide-angle-ultra-wide-angle zoom camera lens

Abstract

A lens system of a compact pop-up camera includes an image sensor having a sensor diagonal length (SD) and a zoom lens having N lens elements L1-LN, the N lens elements being arranged along a lens optical axis (OA). The lens elements can be divided into two lens groups G1 and G2 or three lens groups G1, G2 and G3. In some examples having two lens groups, N = 10, the zoom lens may have: a wide-angle pop-up lens state having a wide-angle field of view FOVW = 70-95 degrees, a wide-angle lens total length TTLW < 30 mm, and a wide-angle pop-up lens state having a wide-angle field of view FOVW = 70-95 degrees, a wide-angle lens total length TTLW < 30 mm; in an ultra-wide-angle (UW) pop-up lens state, the UW field of view FOVUW is equal to 100-140 degrees, and the total length TTLUW of the UW lens is less than 30mm; and in a lens contraction state, the total length c-TTL of the contracted lens is less than 22.5 mm, SD is more than 7.5 mm and less than 30 mm, and c-TTL / SD is less than 1.3. In some examples having three lens groups, N = 11, the zoom lens may have: a wide angle pop-up lens state with FOVW = 70-95 degrees, a wide angle lens total length TTLW < 32 mm; in a long-focus (T) pop-up lens state, FOVT is equal to 20-60 degrees, and the total length TTLT of the T lens is less than 32mm; in the contraction state, c-TTL is smaller than 20 mm, SD is larger than 7.5 mm and smaller than 30 mm, and c-TTL / SD is smaller than 1.3.

Description

[0001] Cross-references

[0002] This application claims priority to U.S. Provisional Patent Application No. 63 / 408,952 filed on September 22, 2022, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application is generally related to digital cameras, especially digital cameras with pop-up mechanisms and zoom lenses.

[0004] definition

[0005] In this application, the following symbols and abbreviations are used for optical and other properties mentioned throughout the specification and drawings, which are terms well known in the art:

[0006] Total Track Length (TTL): The maximum distance between a point on the front surface S1 of the first lens element L1 and the image sensor, measured along the optical axis parallel to the lens, when the system is focused at infinite object distance.

[0007] Back focal length (BFL): The minimum distance between a point on the back surface S2N of the last lens element LN and the image sensor, measured along the optical axis parallel to the lens when the system is focused to infinite object distance.

[0008] Effective focal length (EFL): The distance between the principal point P' at the rear of the lens and the focal point F' at the rear of the lens in the lens (the assembly of lens elements L1 to LN).

[0009] F-number (f / #): The ratio of the EFL to the entrance pupil diameter (EP).

[0010] “35mm equivalent focal length” (35eq.FL): Indicates the (diagonal) field of view (FOV) of the camera. Background Art

[0011] In today's mobile electronic devices (or simply "mobile devices" such as smartphones, tablets, laptops, headphones, etc.), multi-aperture digital cameras (or multi-cameras) are standard. Typically, a multi-camera includes a wide-angle camera (Wide camera), an ultrawide (UW) camera, and a telephoto camera (Tele (T) camera), with the wide-angle camera acting as the main camera (or "base" camera) of the mobile device. The main camera (or wide-angle camera) has a wide-angle camera sensor and a wide-angle camera field of view (FOV) of approximately 70-95 degrees (approximately 20mm-30mm 35eq.FL). W The UW camera has a UW camera sensor and a UW camera field of view (FOV) of approximately 100-140 degrees (approximately 9mm-18mm 35eq.FL). W The T camera has a T camera sensor and a T camera field of view (FOV) of approximately 20-60 degrees (approximately 35mm-125mm 35eq.FL). T <FOV W ).

[0012] To achieve higher image quality (IQ), larger image sensors are incorporated into mobile devices. The optical format of such a large image sensor may be equal to or greater than 1 / 1.5”, that is, it has a full sensor diagonal length (sensor diagonal, SD) SD≥10mm, for example, 1” (SD=16mm) or 4 / 3” (SD=21mm). For example, the pop-up camera described in the co-owned international patent application PCT / IB2020 / 058697 (which is fully incorporated into the present application) allows the integration of a large image sensor while supporting the slim thickness of the mobile device including the pop-up camera.

[0013] FIG. 1A schematically illustrates a mobile device 100 including a known pop-up camera 110 in a first state (“collapsed state”) when the camera is not in use (or inactive). In the collapsed state, the pop-up camera 110 has a first TTL (“collapsed TTL” or “c-TTL”), as labeled. The c-TTL is compatible with the height of modern mobile devices, i.e., in the collapsed state, the pop-up camera 110 does not exceed the height (or thickness) of the mobile device 100. The height of the mobile device 100 may include an elevated region (“camera bump”) of the mobile device 100 that includes multiple cameras.

[0014] FIG. 1B schematically illustrates a mobile device 100 that includes a pop-up camera 110 in a second state (“pop-out state”). Generally, only in the pop-out state can the pop-up camera operate as a camera. In the pop-out state, the pop-up camera 110 has a second TTL (“TTL”), as labeled. TTL > c-TTL, causing the pop-up camera 110 to exceed the height of the mobile device 100. In other words, in the pop-out state, the pop-up camera 110 protrudes from the mobile device 100 (or “pops out” from the mobile device 100). Generally, the thickness (“T”) of the mobile device is about T = 5 mm - 20 mm. The pop-up camera may protrude 1 mm - 15 mm from the mobile device 100.

[0015] However, the above trend of incorporating larger image sensors is mainly carried out for the main camera, rather than for the UW camera and the T camera separately. This means that the difference in sensor area between the main camera sensor and the UW camera sensor and the T camera sensor is increasing, which is accompanied by an increase in the gap (or difference) between the IQ of the main camera and the IQ of the UW camera and the T camera, which is not desirable.

[0016] It would be beneficial to have a pop-up camera that includes a large image sensor and a zoom lens, where the zoom lens allows the main camera and the UW camera or the main camera and the telephoto camera to use a single large image sensor. SUMMARY OF THE INVENTION

[0017] In various exemplary embodiments, a lens system for a compact pop-up camera is provided, including: an image sensor having an overall sensor diagonal length SD; and a zoom lens including N lens elements L1 to LN, the N lens elements being arranged along the lens optical axis from the object side towards the image side, the lens elements being divided into two lens groups G1 and G2, where the zoom lens has an f / #. The zoom lens further has: a wide-angle pop-up lens state having a wide-angle field of view FOV W = 70 to 95 degrees, a wide-angle lens overall length TTL W < 30 mm; an ultra-wide-angle (UW) pop-up lens state having a UW field of view FOV UW = 100 - 140 degrees, a UW lens overall length TTL UW < 30 mm; and a retracted lens state having a retracted lens overall length c-TTL < 22.5 mm, where 7.5 mm < SD < 30 mm, and where c-TTL / SD < 1.3.

[0018] In some examples, SD = 15 mm - 17 mm.

[0019] In some examples, SD = 11 mm - 13 mm, TTLw ≤ 21 mm, TTL UW ≤22mm, and c-TTL≤16mm.

[0020] In some examples, SD = 9 mm - 11 mm, TTL W ≤17.5mm, TTL UW ≤20mm, and c-TTL≤13.5mm.

[0021] In some examples, c-TTL < 20 mm. In some examples, c-TTL / SD < 1.25.

[0022] In some examples, FOV W =75 degrees-85 degrees.

[0023] In some examples, FOV UW =115 degrees-125 degrees.

[0024] In some examples, the wide-angle pop-up lens state has a wide-angle back focus BFL W , the UW pop-up lens state has UW back focus BFL UW , and BFL W >BFL UW .

[0025] In some examples, the wide-angle pop-up lens state has a gap d between G1 and G2. W , the UW pop-up lens state has a gap d between G1 and G2 UW , and d W <d UW .

[0026] In some examples, TTL UW <TTL W In some examples, TTL W =TTL UW ±20%. In some examples, TTL W =TTL UW ±10%.

[0027] In some examples, c-TTL / TTL W <0.85. In some examples, c-TTL / TTL W <0.8.

[0028] In some examples, f / # < 4.0. In some examples, f / # < 3.5. In some examples, f / # < 3.0. In some examples, f / # < 2.5.

[0029] In some examples, the f / # in the wide-angle pop-up lens state and in the UW pop-up lens state is the same.

[0030] In some examples, the lens element is made of plastic.

[0031] In some examples, the lens system is included in a pop-up camera having a driver, wherein the driver is operable to move G1 and G2 relative to each other and relative to the image sensor to switch the pop-up camera between the wide-angle pop-up lens state, the UW pop-up lens state, and the retracted state. In some instances, the driver is operable to switch the pop-up camera between the wide-angle pop-up lens state and the UW pop-up lens state in a continuous manner. In some examples, the driver is operable to switch the pop-up camera between the wide-angle pop-up lens state and the UW pop-up lens state in a discrete manner.

[0032] In various exemplary embodiments, a lens system for a pop-up camera is provided, including: an image sensor having an overall sensor diagonal length SD; and a zoom lens including N lens elements L1 to LN, the N lens elements being arranged along the lens optical axis from the object side toward the image side, the lens elements being divided into three lens groups G1, G2, and G3. The zoom lens has: a wide-angle pop-up lens state having a wide-angle field of view FOV W = 70 degrees - 95 degrees, a wide-angle lens overall length TTL W < 32 mm; a zoom (T) pop-up lens state having a T field of view FOV T = 20 to 60 degrees, a T lens overall length TTL T < 32 mm; and a retracted lens state having a retracted lens overall length c-TTL < 20 mm, where 7.5 mm < SD < 30 mm, and where c-TTL / SD < 1.3.

[0033] In some instances of such lens systems, N = 11.

[0034] In some instances, SD = 13 mm - 15 mm. In some instances, SD = 11 mm - 13 mm, TTL W ≤ 27.5 mm, TTL T ≤ 28 mm, and c-TTL ≤ 17 mm. In some instances, SD = 7 mm - 9 mm, TTL W ≤ 18.5 mm, TTL T ≤ 20 mm, and c-TTL ≤ 12 mm.

[0035] In some examples, TTL W=TTL T ±20%. In some examples, TTL W =TTL T ±10%.

[0036] In some examples, c-TTL / TTL T <0.8. In some instances, c-TTL / TTL T <0.7. In some instances, c-TTL / TTL T <0.65.

[0037] In some examples, TTL T >TTL W .

[0038] In some examples, FOV W =75 degrees-85 degrees.

[0039] In some examples, FOV T =40 degrees-50 degrees.

[0040] In some examples, the wide-angle pop-up lens state has a first gap d between G1 and G2. W,1-2 , the T pop-up lens state has a first gap d T,1-2 , and d W,1-2 <d T,1-2 .

[0041] In some examples, the wide-angle pop-up lens state has a second gap d between G2 and G3. W,2-3 , the T pop-up lens state has a second gap d T,2-3 , and where d W,2-3 >d T,2-3 .

[0042] In some examples, the wide-angle pop-up lens state has a gap d between G1 and G2. W , the UW pop-up lens state has UW, UW gap d between G1 and G2 UW , and where d W <d UW .

[0043] In some examples, the zoom lens has an f / # in the T pop-up lens state. T , and f / # T <8.0. In some examples, the zoom lens has an f / # in the T pop-up lens state T , and where f / # T <7.0.

[0044] In some examples, the zoom lens has an f / # in the wide-angle pop-up lens state. W , and f / # W <4.0. In some examples, the zoom lens has an f / # in the wide-angle pop-up lens state W , and f / # W <3.0. In some examples, the zoom lens has an f / # in the wide-angle pop-up lens state W , and f / # W <2.5.

[0045] In some examples, the lens system is included in a pop-up camera having a driver, wherein the driver is operable to move G1, G2, and G3 relative to each other and relative to the image sensor to switch the pop-up camera between the wide-angle pop-up lens state, the telephoto pop-up lens state, and the retracted state. In some examples, the driver is operable to switch the pop-up camera between the W pop-up lens state and the T pop-up lens state in a continuous manner. In some examples, the driver is operable to switch the pop-up camera between the W pop-up lens state and the T pop-up lens state in a discrete manner.

[0046] In some examples, a pop-up camera as above or below is included in a mobile device. In some instances, the mobile device is a smartphone. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Non-limiting examples are described below in conjunction with the accompanying drawings, which are listed after this paragraph. The same structure, element, or component that appears in more than one drawing is generally labeled with the same number in all of the drawings. If the same element is shown in more than one drawing but is numbered in only one drawing, it is assumed that the element has the same number in all of the drawings. The drawings and written description are intended to illustrate and clarify the examples disclosed herein and should not be construed to limit the application in any way. In the drawings:

[0048] FIG. 1A schematically illustrates an example of a known mobile device in an isometric view, including a pop-up camera in a retracted state;

[0049] FIG. 1B schematically illustrates an example of a known mobile device in an isometric view, which includes a pop-up camera in a pop-up state or an activated state;

[0050] Figure 2A The pop-up optical lens system disclosed in the present application is schematically shown, and the system is in a first state or a wide-angle camera pop-up state;

[0051] Figure 2BThe second state or the ultra-wide-angle camera pop-up state is shown. Figure 2A Pop-up system;

[0052] Figure 2C Shown in a contracted state Figure 2A -B's pop-up system;

[0053] Figure 3A The pop-up optical lens system disclosed in the present application is schematically shown, and the system is in a first state or a wide-angle camera pop-up state;

[0054] Figure 3B The second state or telephoto camera pop-up state is shown. Figure 3A Pop-up system;

[0055] Figure 3C Shows the contracted state Figure 3A - Pop-up system shown in B;

[0056] Figure 4A An example of a pop-up optical lens system disclosed in the present application is shown, the system being in a first state or a wide-angle camera pop-up state;

[0057] Figure 4B The second state or the ultra-wide-angle camera pop-up state is shown. Figure 4A Pop-up system;

[0058] Figure 4C Shown in a contracted state Figure 4A - Pop-up system shown in B;

[0059] Figure 5A An example of a pop-up optical lens system disclosed in the present application is shown, the system being in a first state or a wide-angle camera pop-up state;

[0060] Figure 5B The second state or telephoto camera pop-up state is shown. Figure 5A Pop-up system shown.

[0061] Figure 5C The contracted state is shown Figure 5A - Pop-up system shown in B. DETAILED DESCRIPTION

[0062] Figure 2AThe "two-group" (or 2G) pop-up optical lens system disclosed in the present application is schematically shown, and the system includes a pop-up lens 202 and an image sensor 204, and is numbered 200. The pop-up lens 202 is a zoom lens that is separated into two lens groups by a gap (or distance "d"), namely: a first object side lens group ("group 1" or "G1") and a second sensor side lens group ("group 2" or "G2"). The thicknesses of G1 and G2 are respectively denoted as T G1 and T G2 .

[0063] Figure 2A The pop-up optical lens system 200 is shown in a first (or "wide angle" or "W") pop-up (or extended) state. Field of View FOV W It can be 70-95 degrees. In this pop-up state, this embodiment and all other embodiments disclosed in this application have TTL W , BFL W and the gap d between G1 and G2 W .

[0064] Figure 2B The 2G pop-up optical lens system 200 is shown in the second (or "ultra-wide angle (UW)") pop-up state. In the second or UW pop-up state, the pop-up optical lens system 200 has a FOV UW Imaged onto the image sensor 204. FOV UW Can be 100-140 degrees. In the UW pop-up state, this embodiment and all other embodiments disclosed herein have TTL UW , BFL UW and the gap d between G1 and G2 UW , among which, BFL UW <BFL W And d UW >d W In some examples, TTL UW =TTL W In other examples, TTL UW >TTL W In other examples, TTL UW <TTL W .TTL UW and TTL Wmay all be within a range between 5mm and 30mm. In some examples, the pop-up optical lens system 200 may be operable to continuously switch between the W pop-up state and the UW pop-up state. That is, the pop-up optical lens system 200 may be operable as a camera to capture clear (or "clear") images in the W pop-up state, in the UW pop-up state, and in each intermediate pop-up state between the W pop-up state and the UW pop-up state. In other examples, the pop-up optical lens system 200 may be operable to discretely switch between the W pop-up state and the UW pop-up state. That is, the pop-up optical lens system 200 may be operable as a camera to capture clear images only in the W pop-up state and in the UW pop-up state.

[0065] Figure 2C The 2G pop-up optical lens system 200 is shown in a retracted state. The gap d is retracted to a retracted gap (marked as "cd"), and the BFL is retracted to a retracted BFL (marked as "c-BFL"), that is, the distance between G1 and G2 is reduced, and the distance between G2 and the image sensor 204 is reduced, resulting in c-TTL satisfying c-TTL <TTL W And c-TTL <TTL UW . In this embodiment and all other embodiments disclosed in the present application, cd may be in the range of 0.01mm-2.5mm, c-BFL may be in the range of 0.01mm-2.5mm, and c-TTL may be in the range of 5mm-25mm. Other distances in the pop-up optical lens system 200 remain unchanged, for example, the distances between the lens elements respectively contained in G1 and G2 remain unchanged. In this embodiment and all other embodiments disclosed herein, c-TTL is compatible with the height dimensions of modern mobile devices (such as smartphones), that is, in the retracted state, a pop-up camera including a 2G pop-up optical lens system 200 does not exceed the height (or thickness) of a modern mobile device. It should be noted that all optical lens systems disclosed herein can be beneficially included or integrated into mobile devices, such as smartphones or tablet computers.

[0066] Figure 3A An example of a "three-group" (or "3G") pop-up optical lens system disclosed in the present application is schematically shown, which includes a pop-up lens 302, an image sensor 304, and is labeled 300. The pop-up lens 302 is a zoom lens that is divided into three lens groups ("Group 1" or "G1", "Group 2" or "G2", and "Group 3" or "G3"). The distances between the lens elements contained in G1, G2, and G3 are constant. The thicknesses of G1, G2, and G3 are respectively denoted by T G1 , T G2 and T G3 express. Figure 3A The pop-up optical lens system 300 is shown in a first (or "wide angle" or "W") pop-up state. FOV W It can be 70-95 degrees. In the W pop-up state, G1 and G2 are separated by the first gap ("d w,1-2 ”) are separated from each other, G2 and G3 are separated by a second gap (“d w,2-3 ”) are separated from each other. In the pop-up state, this embodiment and all other embodiments disclosed in this application have TTL W .

[0067] Figure 3B The 3G pop-up optical lens system 300 is shown in a second (or "telephoto" or "T") pop-up state. In the second or T pop-up state, the pop-up optical lens system 300 sets the FOV T Imaged onto image sensor 304. In this and all other embodiments disclosed herein, FOV T It can be 20-60 degrees. In the T pop-up state, this embodiment and all other embodiments disclosed herein have TTL T >TTL W , the first gap d between G1 and G2 T,1-2 and the second gap d between G2 and G3 T,2-3 , where d T,1-2 >d W,1-2 And d T,2-3 <d W,2-3 When switching between W pop-up state and T pop-up state, BFL does not change. TTL T and TTL W Probably between 5mm and 35mm.

[0068] In some examples, the pop-up optical lens system 300 may be operable to continuously switch between the W pop-up state and the T pop-up state. In other examples, the pop-up optical lens system 300 may be operable to discretely switch between the W pop-up state and the T pop-up state.

[0069] Figure 3C The 3G pop-up optical lens system 300 is shown in a retracted state. The first gap and the second gap are retracted to form a retracted first gap (respectively marked as “cd 1-2 ” and “ cd 2-3 ”), the BFL shrinks to a shrunken BFL (labeled as “c-BFL”), that is, the distance between G1 and G2, the distance between G2 and G3, and the distance between G3 and the image sensor 304 are all reduced, resulting in c-TTL satisfying c-TTL <TTL W and c-TTL <TTL TIn this and all other embodiments disclosed in this application, cd 1-2 and cd 2-3 The range of may be 0.01mm-2.5mm, the range of c-BFL may be 0.01mm-2.5mm, and the range of c-TTL may be 5mm-25mm. Other distances in the pop-up optical lens system 300 remain unchanged, for example, the distances between the lens elements respectively included in G1, G2 and G3 remain unchanged. In this embodiment and all other embodiments disclosed in the present application, c-TTL is compatible with the height dimensions of modern mobile devices (such as smartphones). It should be noted that all optical lens systems disclosed in the present application can be beneficially included or integrated into mobile devices, such as smartphones or tablets.

[0070] The pop-up camera including the 2G pop-up optical lens system 200 or the 3G pop-up optical lens system 300 includes a driver for switching the pop-up camera between respective first pop-up states, second pop-up states, and retracted states. Descriptions of such drivers can be found in co-owned international patent applications PCT / IB2020 / 058697, co-owned international patent applications PCT / IB2022 / 056646, and co-owned international patent applications PCT / IB2023 / 054411, which are incorporated herein by reference in their entirety.

[0071] A pop-up camera including the 2G pop-up optical lens system 200 or the 3G pop-up optical lens system 300 may include a sealing device to prevent particles and liquids from entering the pop-up camera and a mobile device including the pop-up camera, thereby supporting an IP68 rating.

[0072] Figure 4A An example of a 2G pop-up optical lens system disclosed in the present application is shown, which is numbered 400. The pop-up optical lens system 400 is shown in a first (or "W") pop-up (or extended) state. In the first or wide-angle pop-up state, the FOV of the pop-up optical lens system 400 is W = 80 degrees (26 mm 35 eq. FL). In other embodiments, FOV WCan be in the range of 70-95 degrees. Lens system 400 includes a pop-up zoom lens 402 and an image sensor 404 divided into two lens groups G1 and G2, and optionally includes an optical element 406. Optical element 406 can be, for example, an infrared (IR) filter and / or a glass image sensor dust cover. The full sensor diagonal length (SD) of image sensor 404 is 16 mm. In other examples, 7.5 mm ≤ SD ≤ 25 mm. G1 includes five lens elements (L1 to L5), and G2 includes five lens elements (L6 to L10). Light passes through lens 402 and forms an image on image sensor 404. Figure 4A -B shows four fields of view, each with three rays: upper edge ray, lower edge ray and principal ray. These three rays are also shown in all subsequent figures. TTL of the pop-up optical lens system 400 in the wide-angle pop-up state W =25.2mm, BFL W =7.65mm, gap d between G1 and G2 W =0.03mm, see Table 2. BFL W With TTL W The ratio satisfies BFL W / TTL W =0.3.

[0073] Figure 4B The 2G pop-up optical lens system 400 is shown in a second (or "UW") pop-up state. In the second or UW pop-up state, the FOV of the pop-up optical lens system 400 is UW = 118 degrees (13 mm 35 eq. FL). In other embodiments, FOV UW Probably in the range of 100 to 140 degrees. In the UW pop-up state, the TTL of the pop-up optical lens system 400 UW =26.6mm, BFL UW =5.98mm, gap d between G1 and G2 UW =3.09mm, see Table 2. d UW With TTL UW The ratio satisfies d UW / TTL UW = 0.12. The f / # in the W pop-up state is the same as the f / # in the UW pop-up state.

[0074] Figure 4C The 2G pop-up optical lens system 400 is shown in a retracted state. In the retracted state, the pop-up optical lens system 400 has c-TTL=19.6 mm, c-BFL=1.4 mm, cd=0.02 mm. The ratio c-TTL / SD is 1.225. The ratio c-TTL / TTLw is 0.78.

[0075] The lens 402 includes a plurality of (N) lens elements Li (where i is an integer between 1 and N, and N may be, for example, between 5 and 10). L1 is the lens element closest to the object side, and LN is the lens element closest to the image side (i.e., the side where the image sensor is located). This order applies to all lenses and lens elements disclosed in the present application. Each lens element Li includes a respective front surface S2i-1 (the index "2i-1" is the number of the front surface) and a respective rear surface S2i (the index "2i" is the number of the rear surface). This numbering guideline runs through the entire specification. Alternatively, as done throughout the specification, the lens surfaces are labeled "Sk", where k is from 1 to 2N. The front and rear surfaces may be aspherical in some cases, but this is not limiting.

[0076] In this application, the term "front surface" of each lens element refers to the surface of the lens element located closer to the camera entrance (the object side of the camera), and the term "back surface" refers to the surface of the lens element located closer to the image sensor (the image side of the camera).

[0077] Tables 1-3 provide detailed optical data and surface data of the pop-up lens 402. Table 1 provides the surface type. Table 2 provides the surface type in the wide-angle pop-up state ( Figure 4A ) and UW Pop-up Status ( Figure 4B ). In Table 2, "Ti" represents the thickness of surface i. T10 provides the value of the distance d between G1 and G2. EFL, TTL and BFL are given in millimeters and FOV is in degrees. Table 3 provides the aspheric coefficients. The surface types are:

[0078] a) Plane: a flat surface with no curvature;

[0079] b) Q Type 1 (QT1) surface sag formula:

[0080]

[0081] c) Formula for the sag height of uniform aspheric (ASP) surface:

[0082]

[0083] where {z,r} are standard cylindrical polar coordinates, c is the paraxial curvature of the surface, k is the conic parameter, and r norm Usually half of the surface clear aperture (CA), A nare the aspheric coefficients shown in the lens data sheet. The Z axis is positive toward the image side. The values ​​of CA are given as the radius of the clear aperture, i.e. D / 2. The reference wavelength is 555.0 nm. Units except for the refractive index ("Index") and the Abbe number (Abbe#) are in millimeters. Each lens element Li has its own focal length fi, see Table 1. The FOV is given as the half field of view (HFOV). The definitions of surface type, Z axis, CA value, reference wavelength, units, focal length and HFOV are valid for all subsequent tables.

[0084]

[0085]

[0086]

[0087] Table 1

[0088]

[0089] Table 2

[0090]

[0091]

[0092] Table 3

[0093] It should be noted that an optical lens system (e.g., a pop-up optical lens system 400) can be linearly scaled, which is a known technique in the art. For example, using a smaller image sensor reduces TTL, thereby reducing the height of a camera including the optical lens system. Specifically, Table 4 shows the values ​​and dimensions of a camera including a pop-up optical lens system 400 with an SD of 12 mm, and Table 5 shows the values ​​and dimensions of a camera including a pop-up optical lens system 400 with an SD of 10 mm. In other examples, the pop-up optical lens system 400 can be scaled to achieve an SD in the range of 7.5 mm ≤ SD ≤ 25 mm.

[0094]

[0095] Table 4

[0096]

[0097] Table 5

[0098] Figure 5A An example of a 3G pop-up optical lens system disclosed in the present application is shown, which is numbered 500. The pop-up optical lens system 500 is shown in a first (or "W") pop-up (or extended) state. In the first or wide-angle pop-up state, the FOV of the pop-up optical lens system 500 isW = 80 degrees (26 mm 35 eq. FL). In other embodiments, FOV W Can be between 70 and 95 degrees. Lens system 500 includes a pop-up zoom lens 502 and an image sensor 504, and optionally includes an optical element 506, the pop-up zoom lens 502 is divided into three lens groups G1, G2 and G3. Optical element 506 can be, for example, an infrared (IR) filter and / or a glass image sensor dust cover. The full sensor diagonal length (SD) of image sensor 504 is 14mm. In other examples, 7mm≤SD≤25mm. Lens 502 includes multiple (N=11) lens elements. G1 includes three lens elements (L 1 To L 3 ), the G2 consists of three lens elements (L 4 To L 6 ), the G3 includes five lens elements (L 7 To L 11 ). G1 =5.3mm, T G2 =3.2mm, T G3 =5.6 mm. The light passes through the lens 502 and forms an image on the image sensor 504. Figure 5A -B shows seven fields of view, each field of view has three rays: upper edge ray, lower edge ray and main ray. Detailed optical data of the pop-up lens 502 is given in Tables 6-8

[0099] and surface data. Table 6 provides the surface types. Table 7 provides the Figure 5A ) and T pop-up state ( Figure 5B ) between the values ​​that vary. In Table 7, “T i ” represents the thickness of surface i. T5 provides the distance d between G1 and G2 1-2 T10+T11 provides the distance d between G2 and G3. 2-3 Table 8 provides the aspheric coefficients.

[0100] In W pop-up state, the TTL of the pop-up optical lens system 500 W =28.6mm, the first gap d between G1 and G2 W,1-2 =0.27mm, the second gap d between G2 and G3 W,2-3 =6.29mm, and BFL =7.34mm, see Table 7. W,2-3 With TTL W The ratio satisfies d W,2-3 / TTL W =0.22.

[0101] Figure 5B The 3G pop-up optical lens system 500 is shown in the second (or Tele or "T") pop-up state. In the second or T pop-up state, the FOV of the pop-up optical lens system 500 is T is 45 degrees (52mm 35eq.FL). In other embodiments, FOV T It can be between 20 and 60 degrees. In the T pop-up state, the TTL of the pop-up optical lens system 500 T =29.8mm, the first gap d between G1 and G2 T,1-2 =4.87mm, the second gap d between G2 and G3 T,2-3 = 0.98 mm. BFL does not change between the W ejection state and the T ejection state. The values ​​are given in Table 7. d T,1-2 With TTL T The ratio satisfies d T,1-2 / TTL T =0.16. Ratio BFL / TTL T is 0.25. f / # in W pop-up state (“f / # W ”) and f / # in T pop-up state (“f / # T ”). In fact, the entrance pupil diameter (EP) of the 3G pop-up optical lens system 500 is larger in the W pop-up state than in the T pop-up state (see Table 7).

[0102] Figure 5C The 3G pop-up optical lens system 500 is shown in a retracted state. In the retracted state, the c-TTL of the pop-up optical lens system 500 is 17.8 mm, the c-BFL is between 0.01 mm and 2.5 mm, and the first retracted gap cd between G1 and G2 is 1-2 The second shrinkage gap cd between G2 and G3 is between 0.01 mm and 2.5 mm 2-3 Between 0.01mm and 2.5mm. The ratio c-TTL / SD is 1.27. The ratio c-TTL / TTL T It is 0.59.

[0103]

[0104]

[0105] Table 6

[0106]

[0107] Table 7

[0108]

[0109]

[0110] Table 8

[0111] It should be noted that the pop-up optical lens system 500 can be linearly scaled. Specifically, Table 9 shows the values ​​and sizes of the cameras of the pop-up optical lens system 500 including the camera of the pop-up optical lens system 500 with an SD of 12 mm, and Table 10 shows the values ​​and sizes of the cameras of the pop-up optical lens system 500 including the camera of the pop-up optical lens system 500 with an SD of 8 mm. In other examples, the pop-up optical lens system 500 can be scaled to achieve an SD in the range of 5 mm ≤ SD ≤ 25 mm.

[0112]

[0113]

[0114] Table 9

[0115]

[0116] Table 10

[0117] Although the present disclosure has been described by certain examples and generally related methods, variations and permutations of these examples and methods will be apparent to those skilled in the art. The present disclosure should not be limited to the specific examples described herein, but should be limited only by the scope of the appended claims.

[0118] It should be noted that, for the sake of clarity, certain features of the presently disclosed subject matter described in multiple separate examples may also be provided in combination in a single example. Conversely, for the sake of brevity, various features of the presently disclosed subject matter described in a single example may also be provided separately or in any suitable sub-combination.

[0119] Unless otherwise indicated, the use of "and / or" between the last two components of a list of options indicates that one or more of the listed options may be selected.

[0120] It should be understood that when the claim or specification refers to "a" or "an" element, it should not be construed that there is only one of the element.

[0121] All patents and patent applications mentioned in this specification are incorporated by reference in their entirety into this specification to the same extent as each individual patent or patent application is specifically and individually indicated as being incorporated by reference into this specification. In addition, any reference cited or identified in this application should not be construed as an admission that the reference is available as prior art to the present disclosure.

Claims

1. A lens system for a pop-up camera, comprising: an image sensor having an overall sensor diagonal length SD; and a zoom lens comprising N lens elements L1 to LN, the N lens elements being arranged along the lens optical axis from the object side towards the image side, the lens elements being divided into two lens groups G1 and G2, wherein the zoom lens has an f / # and has: Wide-angle pop-up lens status, which has a wide-angle field of view FOV W =70 to 95 degrees, wide-angle lens total length TTL W <30mm, Ultra-wide-angle (UW) pop-up lens status, which has a UW field of view FOV UW =100-140 degrees, UW lens total length TTL UW <30 mm, and a retracted lens state having a retracted lens overall length c-TTL < 22.5 mm, where 7.5 mm < SD < 30 mm, and where c-TTL / SD < 1.

3.

2. The lens system according to claim 1, wherein, N＝10。 3. The lens system according to claim 1, wherein, SD = 15 mm - 17 mm.

4. The lens system according to claim 1, wherein, SD=11mm-13mm,TTLw≤21mm,TTL UW ≤22mm, and where c-TTL≤16mm.

5. The lens system according to claim 1, wherein, SD=9mm-11mm, of which TTL W ≤17.5mm, of which TTL UW ≤20mm, and c-TTL≤13.5mm.

6. The lens system according to claim 1, wherein, c-TTL < 20 mm.

7. The lens system according to claim 1, wherein, c-TTL / SD < 1.

25.

8. The lens system according to claim 1, wherein, TTL UW <TTL W 。 9. The lens system according to claim 1, wherein, FOV W = 75 degrees - 85 degrees.

10. The lens system according to claim 1, wherein, FOV UW = 115 degrees - 125 degrees.

11. The lens system according to claim 1, wherein, The wide-angle pop-up lens has a wide-angle back focus BFL W , wherein the UW pop-up lens state has a UW back focus BFL UW , and where BFL W >BFL UW .

12. The lens system according to claim 1, wherein, The wide-angle pop-up lens state has a gap d between G1 and G2 W , where the UW pop-up lens state has a gap d between G1 and G2 UW , and where d W <d UW .

13. The lens system according to claim 1, wherein, TTL W =TTL UW ±20%。 14. The lens system according to claim 1, wherein, TTL W =TTL UW ±10%。 15. The lens system according to claim 1, wherein, c-TTL / TTL W <0.85。 16. The lens system according to claim 1, wherein, c-TTL / TTL W <0.8。 17. The lens system according to claim 1, wherein, f / #<4.0。 18. The lens system according to claim 1, wherein, f / #<3.5。 19. The lens system according to claim 1, wherein, f / #<3.0。 20. The lens system according to claim 1, wherein, f / #<2.5。 21. The lens system according to claim 1, wherein, the f / # in the wide-angle pop-up lens state and in the UW pop-up lens state is the same.

22. The lens system according to claim 2, wherein, the lens elements are made of plastic.

23. The lens system according to claim 1, which is included in a pop-up camera having a driver, wherein, the driver is operable to move G1 and G2 relative to each other and relative to the image sensor to switch the pop-up camera between the wide-angle pop-up lens state, the UW pop-up lens state, and the retracted state.

24. The lens system according to claim 23, wherein, the driver is operable to switch the pop-up camera between the wide-angle pop-up lens state and the UW pop-up lens state in a continuous manner.

25. The lens system according to claim 23, wherein, the driver is operable to switch the pop-up camera between the wide-angle pop-up lens state and the UW pop-up lens state in a discrete manner.

26. The lens system according to any one of claims 1 - 25, wherein, the pop-up camera is included in a mobile device.

27. The lens system according to claim 26, wherein, The mobile device is a smart phone.

28. A lens system for a pop-up camera, comprising: an image sensor having an overall sensor diagonal length SD; and a zoom lens including N lens elements L1 to LN arranged along the lens optical axis from the object side towards the image side, the lens elements being divided into three lens groups G1, G2 and G3, wherein the zoom lens has: Wide-angle pop-up lens status, which has a wide-angle field of view FOV W =70 degrees -95 degrees, total length of wide-angle lens TTL W <32mm, Zoom (T) pop-up lens state, which has T field of view FOV T =20 to 60 degrees, T lens total length TTL T <32 mm, and a retracted lens state having a retracted lens overall length c-TTL < 20 mm, where 7.5 mm < SD < 30 mm, and where c-TTL / SD < 1.

3.

29. The lens system according to claim 28, wherein, N＝11。 30. The lens system according to claim 28, wherein, SD = 13 mm - 15 mm.

31. The lens system according to claim 28, wherein, SD = 11mm-13mm, of which TTL W ≤27.5mm, of which TTL T ≤28mm, and where c-TTL≤17mm.

32. The lens system according to claim 28, wherein, SD=7mm-9mm, of which TTL W ≤18.5mm, of which TTL T ≤20mm, and where c-TTL≤12mm.

33. The lens system according to claim 28, wherein, TTL W =TTL T ±20%。 34. The lens system according to claim 28, wherein, TTL W =TTL T ±10%。 35. The lens system according to claim 28, wherein, c-TTL / TTL T <0.8。 36. The lens system according to claim 28, wherein, c-TTL / TTL T <0.7。 37. The lens system according to claim 28, wherein, c-TTL / TTL T <0.65。 38. The lens system according to claim 28, wherein, TTL T >TTL W 。 39. The lens system according to claim 28, wherein, FOV W = 75 degrees - 85 degrees.

40. The lens system according to claim 28, wherein, FOV T = 40 degrees - 50 degrees.

41. The lens system according to claim 28, wherein, The wide-angle pop-up lens state has a first gap d between G1 and G2 W,1-2 , wherein the T pop-up lens state has a first gap d T,1-2 , and d W,1-2 <d T,1-2 .

42. The lens system according to claim 28, wherein, The wide-angle pop-up lens state has a second gap d between G2 and G3 W,2-3 , wherein the T pop-up lens state has a second gap d T,2-3 , and where d W,2-3 >d T,2-3 .

43. The lens system according to claim 28, wherein, The zoom lens has an f / # in the T pop-up lens state T , and where f / # T <8.

0.

44. The lens system according to claim 28, wherein, The zoom lens has an f / # in the T pop-up lens state T , and where f / # T <7.

0.

45. The lens system according to claim 28, wherein, The zoom lens has an f / # in the wide-angle pop-up lens state W , and where f / # W <4.

0.

46. The lens system according to claim 28, wherein, The zoom lens has an f / # in the wide-angle pop-up lens state W , and where f / # W <3.

0.

47. The lens system according to claim 28, wherein, The zoom lens has an f / # in the wide-angle pop-up lens state W , and where f / # W <2.

5.

48. The lens system according to claim 28, wherein, The zoom lens has an f / # in the wide-angle pop-up lens state W , and where f / # W <2.

25.

49. The lens system according to claim 28, which is included in a pop-up camera having a driver, wherein, the driver is operable to move G1, G2 and G3 relative to each other and relative to the image sensor to switch the pop-up camera between the wide-angle pop-up lens state, the telephoto pop-up lens state and the retracted state.

50. The lens system according to claim 49, wherein, the driver is operable to switch the pop-up camera between the W pop-up lens state and the T pop-up lens state in a continuous manner.

51. The lens system according to claim 49, wherein, the driver is operable to switch the pop-up camera between the W pop-up lens state and the T pop-up lens state in a discrete manner.

52. The lens system according to any one of claims 28 - 51, wherein, the pop-up camera is included in a mobile device.

53. The lens system according to claim 52, wherein, the mobile device is a smart phone.

Images