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 camera system, 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 five lens elements include, in order from an object side to an image side, a first lens element L 1 with positive refractive power and a focal length f 1 , a second lens element L 2 with negative refractive power, a third lens element L 3 , a fourth lens element L 4 , and a fifth lens element L 5 , wherein f 1 is smaller than TTL T /2, wherein the first, third and fifth lens elements have each an Abbe number greater than 50, wherein the second and fourth lens elements have each an Abbe number smaller than 30,
wherein the camera system is a dual-aperture zoom camera,
wherein a ratio e=EFL T /EFL W is in the range 1.3-2.0,
wherein EFL W is in the range 2.5-6 mm and wherein EFL T is in the range 5-12 mm,
and wherein a height difference between the Tele and Wide cameras is equal to or smaller than 1.65 mm.
2. The camera system of claim 1 , wherein a ratio TTL T /TTL W is smaller than 0.8e.
3. The camera system of claim 1 , wherein a height of the dual-aperture zoom camera has a value between 4 mm and 8 mm.
4. The camera system of claim 1 , wherein the F number is substantially equal to 2.8.
5. A camera system, 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 five lens elements include, in order from an object side to an image side, a first lens element with positive refractive power, a second lens element with negative refractive power having a thickness d 2 on an optical axis and separated from the first lens element by a first air gap, a third lens element with negative refractive power and separated from the second lens element by a second air gap, a fourth lens element with positive refractive power and separated from the third lens element by a third air gap, and a fifth lens element with negative refractive power, separated from the fourth lens element by a fourth air gap, the fifth lens element having a thickness d 5 on the optical axis,
wherein the camera system is a dual-aperture zoom camera,
wherein a ratio e=EFL T /EFL W is in the range 1.3-2.0,
wherein EFL W is in the range 2.5-6 mm and wherein EFL T is in the range 5-12 mm,
and wherein a height difference between the Tele and Wide cameras is equal to or smaller than 1.65 mm.
6. The camera system of claim 5 , wherein a focal length of the first lens element f1 is smaller than TTL T /2, wherein the first, third and fifth lens elements have each an Abbe number greater than 50, wherein the second and fourth lens elements have each an Abbe number smaller than 30.
7. The camera system of claim 6 , wherein the first air gap is smaller than d 2 /2, wherein the third air gap is greater than TTL T /5 and wherein the fourth air gap is smaller than 1.5d 5 .
8. The camera system of claim 7 , wherein the first air gap is smaller than d 2 /2, wherein the third air gap is greater than TTL T /5 and wherein the fourth air gap is smaller than 1.5d 5 .