Slim pop-out wide camera lenses
Pop-out lens systems for compact digital cameras, comprising an image sensor and a lens with a field of view FOV>60 deg and having i lens elements L 1 -Li starting with L 1 from an object side toward an image side, each lens element Li having a respective focal length f i , the lens elements divided into two lens groups G 1 and G 2 separated by a big gap (BG), the lens having a pop-out total track length TTL<20 mm in a pop-out state and a collapsed total track length c-TTL in a collapsed state, wherein BG>0.25×TTL, wherein either G 1 can move relative to G 2 and to the image sensor for focusing or G 1 and G 2 can move together relative to the image sensor for focusing, and wherein a ratio c-TTL/TTL<0.7.
1. A lens system for a compact digital camera, comprising:
an image sensor having a sensor diagonal (SD); and
a lens with a field of view (FOV)>60 deg, a lens thickness (T Lens ), a back focal length (BFL), an effective focal length (EFL) and N≥6 lens elements L 1 -LN arranged along a lens optical axis (OA) starting with L 1 from an object side toward an image side, the lens having a pop-out total track length (TTL)<20 mm in a pop-out state and a collapsed total track length (c-TTL) in a collapsed state, wherein the lens system is configured to switch from a pop-out state to a collapsed state by collapsing BFL to a collapsed (c-BFL), wherein SD≥10 mm, wherein BFL>0.15×TTL, and wherein a ratio c-TTL/SD<0.7.
2. The lens system of claim 1 , wherein N is 6, 7 or 8.
3. The lens system of claim 1 , wherein c-TTL/SD<0.65.
4. The lens system of claim 1 , wherein c-TTL/SD<0.6.
5. The lens system of claim 1 , wherein c-TTL/SD<0.55.
6. The lens system of claim 1 , wherein c-TTL/SD>0.4.
7. The lens system of claim 1 , wherein TTL/SD≤0.7.
8. The lens system of claim 1 , wherein TTL/SD≤0.65.
9. The lens system of claim 1 , wherein TTL/SD is in the range of 0.59 to 0.65.
10. The lens system of claim 1 , the lens system having a f number (f/#), and wherein f/#≤2.0.
11. The lens system of claim 10 , wherein f/#≤1.75.
12. The lens system of claim 1 , wherein TTL is in the range of 9.3 mm to 10.5 mm.
13. The lens system of claim 1 , wherein BFL>1.5 mm.
14. The lens system of claim 1 , wherein BFL>2 mm.
15. The lens system of claim 1 , wherein BFL≤3.0 mm.
16. A lens system for a compact digital camera, comprising:
an image sensor having a sensor diagonal (SD); and
a lens with a field of view (FOV)>60 deg, a lens thickness (T Lens ), a back focal length (BFL), an effective focal length (EFL) and N≥6 lens elements L 1 -LN arranged along a lens optical axis (OA) starting with L 1 from an object side toward an image side, the lens having a pop-out total track length (TTL)<20 mm in a pop-out state and a collapsed total track length (c-TTL) in a collapsed state, wherein the lens system is configured to switch from a pop-out state to a collapsed state by collapsing BFL to a collapsed (c-BFL), wherein c-BFL is in the range of 0.2 mm to 2.5 mm, wherein SD≥10 mm, wherein BFL>0.15×TTL, and wherein a ratio c- TTL/SD<0.7.
17. The lens system of claim 1 , wherein c-TTL/TTL<0.9.
18. The lens system of claim 1 , wherein BFL>0.2×TTL.
19. The lens system of claim 1 , wherein SD=16.0 mm.
20. The lens system of claim 1 , wherein SD is in the range of 10-30 mm.
21. The lens system of claim 1 , wherein SD is in the range of 14-20 mm.
22. The lens system of claim 1 , wherein FOV≥80 degrees.
23. The lens system of claim 1 , wherein the lens system is included in a mobile device.
24. The lens system of claim 23 , wherein the mobile device is a smartphone.