Thin dual-aperture zoom digital camera

• US 9,599,796 B2
• Filed: 12/18/2015
• Issued: 03/21/2017
• 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 TRUNG
• Application Number:
  US14/973,753
• Publication Number:
  US 20160105616A1
• Time in Patent Office: 459 Days
• US Class Current: 1/1
• 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 respective total track lengths TTL_W and TTL_T, and wherein TTL_W/EFL_W>

1.1 and TTL_T/EFL_T<

1.0;

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 for ZF=1, EFL_ZF=EFL_W.

3. 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.

4. 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.

5. 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.

6. The dual-aperture zoom camera of claim 1, wherein a ratio TTL_T/TTL_W is in the range 1.0-1.25.

7. The dual-aperture zoom camera of claim 1, having a dual-aperture zoom camera height of less than 7 mm and wherein EFL_T>

6.1 mm.

8. The dual-aperture zoom camera of claim 1, wherein the Tele lens comprises in order from an object side to an image side, a first lens element with positive refractive power and a second lens element with negative refractive power, wherein the first lens element has a convex object-side surface and a convex or concave image-side surface, an Abbe number greater than 50 and a focal length f1 smaller than TTL/2, and wherein the second lens element is a meniscus lens having a convex object-side surface and an Abbe number smaller than 30.

9. A method for manufacturing a dual-aperture zoom camera comprising:

a) providing a Wide camera having a Wide lens with an effective focal length (EFL) EFL_W and a total track length (TTL) TTL_W;

b) providing a Tele camera having a Tele lens with an effective focal length EFL_T and a total track length TTL_T, wherein TTL_W/EFL_W>

1.1 and wherein TTL_T/EFL_T<

1.0; and

c) configuring an optical image stabilization (OIS) controller of the dual-aperture zoom camera to compensate 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 in radians and EFL_ZF is a zoom-factor dependent effective focal length in millimeters.

10. A method of compensating lens movement in a dual-aperture zoom camera comprising 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 respective total track lengths TTL_W and TTL_T, the method comprising using an optical image stabilization (OIS) controller of the dual-aperture zoom camera for compensating 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 in radians and EFL_ZF is a zoom-factor dependent effective focal length in millimeters.