Thin dual-aperture zoom digital camera

• US 10,620,450 B2
• Filed: 03/12/2019
• Issued: 04/14/2020
• Est. Priority Date: 07/04/2013
• Status: Active Grant

• Current Assignee: Corephotonics Ltd. (Samsung Electronics Co. Ltd.)
• Original Assignee: Corephotonics Ltd. (Samsung Electronics Co. Ltd.)
• Inventors: Shabtay, Gal, Goldenberg, Ephraim
• Primary Examiner(s): Nguyen, Luong T
• Application Number:
  US16/299,450
• Publication Number:
  US 20190212574A1
• Time in Patent Office: 399 Days
• CPC Class Codes: G02B 1/041 Lenses
• CPC Class Codes: G02B 13/00 Optical objectives specially designed for the purposes specified below with variable magnification in general G02B15/00
• CPC Class Codes: G02B 13/002 having at least one aspherical surface
• CPC Class Codes: G02B 13/004 having four lenses
• CPC Class Codes: G02B 13/0045 having five or more lenses
• CPC Class Codes: G02B 13/009 having zoom function
• CPC Class Codes: G02B 13/02 Telephoto objectives, i.e. systems of the type + - in which the distance from the front vertex to the image plane is less than the equivalent focal length
• CPC Class Codes: G02B 13/18 with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration G02B13/002 takes precedence
• CPC Class Codes: G02B 27/0025 for optical correction, e.g. distorsion, aberration
• CPC Class Codes: G02B 27/646 compensating for small deviations, e.g. due to vibration or shake movement of one or more optical elements for control of motion blur in cameras, projectors or printers G03B2205/0007; image stabilisation in cameras peculiar to the presence or use of an electronic image sensor H04N23/68
• CPC Class Codes: G02B 5/005 Diaphragms for cameras G03B9/02
• CPC Class Codes: G02B 9/00 Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - G02B15/00 takes precedence
• CPC Class Codes: G02B 9/12 having three components only
• CPC Class Codes: G02B 9/60 having five components only
• CPC Class Codes: G02B 9/62 having six components only
• CPC Class Codes: G02B 9/64 having more than six components
• CPC Class Codes: H04N 2101/00 Still video cameras
• CPC Class Codes: H04N 2201/00 Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
• CPC Class Codes: H04N 23/16 Optical arrangements associated therewith, e.g. for beam-splitting or for colour correction
• CPC Class Codes: H04N 23/45 for generating image signals from two or more image sensors being of different type or operating in different modes, e.g. with a CMOS sensor for moving images in combination with a charge-coupled device [CCD] for still images
• CPC Class Codes: H04N 23/57 : Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices
• CPC Class Codes: H04N 23/69 : Control of means for changing angle of the field of view, e.g. optical zoom objectives or electronic zooming
• CPC Class Codes: Y10T 29/4913 : Assembling to base an electrical component, e.g., capacitor, etc.

Abstract

A dual-aperture zoom camera comprising a Wide camera with a respective Wide lens and a Tele camera with a respective Tele lens, the Wide and Tele cameras mounted directly on a single printed circuit board, wherein the Wide and Tele lenses have respective effective focal lengths EFL_W and EFL_T and respective total track lengths TTL_W and TTL_T and wherein TTL_W/EFL_W>1.1 and TTL_T/EFL_T<1.0. Optionally, the dual-aperture zoom camera may further comprise an optical OIS controller configured to provide a compensation lens movement according to a user-defined zoom factor (ZF) and a camera tilt (CT) through LMV=CT*EFL_ZF, where EFL_ZF is a zoom-factor dependent effective focal length.

Claims

1. A dual-aperture zoom camera, comprising:

a) a Wide camera with a respective Wide lens and a Tele camera with a respective Tele lens, wherein the Wide and Tele lenses have respective effective focal lengths EFL_W and EFL_T and wherein EFL_T>

EFL_W; and

b) an optical image stabilization (OIS) mechanism configured to provide a compensation for lens movement (LMV) of the Wide and Tele lenses according to a camera tilt (CT) input and a user-defined zoom factor (ZF), wherein LMV=CT×

EFL_ZF and wherein CT is a camera tilt in radians and EFL_ZF is a zoom-factor dependent effective focal length in millimeters.

2. The dual-aperture zoom camera of claim 1, wherein a height difference between the Tele and Wide cameras is equal to or smaller than 1.65 mm.

3. The dual-aperture zoom camera of claim 1, wherein a ratio e=EFL_T/EFL_W between the effective focal lengths of the Tele and Wide cameras is in the range 1.3-2.0.

4. The dual-aperture zoom camera of claim 3, wherein a ratio TTL_T/TTL_W between the total track lengths of the Tele and Wide cameras is smaller than 0.8e.

5. The dual-aperture zoom camera of claim 1, wherein a height of the dual-aperture zoom camera has a value between 4 mm and 8 mm.

6. The dual-aperture zoom camera of claim 1, wherein the Tele lens comprises, starting form an object side, first, second, third, fourth and fifth lens elements and wherein an air gap between the third lens element and the fourth lens element is greater than TTL_T/5.

7. The dual-aperture zoom camera of claim 1, wherein the Tele lens comprises, starting form an object side, first, second, third, fourth and fifth lens elements and wherein an air gap between the fourth lens element and the fifth lens element is smaller than 1.5 times a width of the fifth lens element.

8. The dual-aperture zoom camera of claim 1, wherein the Tele lens has a F number smaller than 3.

9. The dual-aperture zoom camera of claim 1, wherein the Tele lens has a F number substantially equal to 2.8.

10. The dual-aperture zoom camera of claim 1, wherein the Tele lens comprises, starting form an object side, first, second, third, fourth and fifth lens elements and wherein the fourth lens element and the fifth lens element have different dispersions.

11. The dual-aperture zoom camera of claim 1, wherein the Tele lens comprises, starting form an object side, first, second, third, fourth and fifth lens elements and wherein the fourth and fifth lens elements have opposite refractive power signs.

12. The dual-aperture zoom camera of claim 1, wherein the Tele lens comprises, starting form an object side, first, second, third, fourth and fifth lens elements and wherein the third lens element has negative refractive power.

13. The dual-aperture zoom camera of claim 1, wherein for ZF=1, EFL_ZF=EFL_W.

14. The dual-aperture zoom camera of claim 1, wherein EFL_T/EFL_W=e, wherein e is in the range 1.3-2.0 and wherein for ZF>

e, EFL_ZF=EFL_T.

15. The dual-aperture zoom camera of claim 1, wherein EFL_T/EFL_W=e, wherein e is in the range 1.3-2.0 and wherein for ZF in the range 1<

ZF<

e, EFL_ZF=ZF×

EFL_W.

16. The dual-aperture zoom camera of claim 1, wherein the Tele lens comprises, starting form an object side, first, second, third, fourth and fifth lens elements and wherein an air gap between the first lens element and the second lens element is smaller than half a width of the second lens element.

17. The dual-aperture zoom camera of claim 16, wherein the fourth lens element and the fifth lens element have opposite refractive power signs.

18. The dual-aperture zoom camera of claim 16, wherein the third lens element has negative refractive power.