Thin dual-aperture zoom digital camera
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.
1. A dual-aperture zoom camera, comprising:
a) a Wide camera that includes a Wide lens with an effective focal length EFL W and a total track length TTL W ; and
b) a Tele camera that includes a Tele lens with five lens elements along a Tele lens optical axis and with an effective focal length EFL T , a total track length TTL T and a F number smaller than 3.2,
wherein the respective Wide and Tele lens total track lengths and effective focal lengths fulfill the conditions TTL W /EFL W >1.1 and TTL T /EFL T <1.0, and wherein a height difference between the Tele and Wide cameras is equal to or smaller than 1.65 mm.
2. 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.
3. The dual-aperture zoom camera of claim 2 , wherein a ratio TTL T /TTL W between the total track lengths of the Tele and Wide cameras is smaller than 0.8e.
4. 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.
5. The dual-aperture zoom camera of claim 1 , wherein the five lens elements include a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element, and wherein an air gap between the third lens element and the fourth lens element along the Tele lens optical axis is greater than TTL T /5.
6. The dual-aperture zoom camera of claim 1 , wherein the five lens elements include a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element, and wherein an air gap between the first lens element and the second lens element along the Tele lens optical axis is smaller than half a width of the second lens element.
7. The dual-aperture zoom camera of claim 1 , wherein the five lens elements include a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element, and wherein an air gap between the fourth lens element and the fifth lens element along the Tele lens optical axis is smaller than 1.5 times a width of the fifth lens element.
8. The dual-aperture zoom camera of claim 1 , wherein the F number is substantially equal to 2.8.
9. The dual-aperture zoom camera of claim 1 , wherein the five lens elements include a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element, and wherein the fourth lens element and the fifth lens element have different dispersions.
10. The dual-aperture zoom camera of claim 1 , wherein the five lens elements include a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element, and wherein the fourth and fifth lens elements have opposite refractive power signs.
11. The dual-aperture zoom camera of claim 1 , wherein the five lens elements include a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element, and wherein the third lens element has negative refractive power.
12. The dual-aperture zoom camera of claim 4 , wherein the five lens elements include a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element, and wherein the fourth lens element and the fifth lens element have opposite refractive power signs.
13. The dual-aperture zoom camera of claim 4 , wherein the five lens elements include a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element, and wherein the third lens element has negative refractive power.