MINIATURE TELEPHOTO LENS MODULE AND A CAMERA UTILIZING SUCH A LENS MODULE

• US 20170353645A1
• Filed: 01/03/2015
• Published: 12/07/2017
• Est. Priority Date: 01/03/2015
• Status: Active Grant

• Current Assignee: Corephotonics Ltd. (Samsung Electronics Co. Ltd.)
• Original Assignee: Corephotonics Ltd. (Samsung Electronics Co. Ltd.)
• Inventors: Shabtay, Gal, Goldenberg, Ephraim
• Granted Patent: US 10,288,840 B2
• Time in Patent Office: Days
• CPC Class Codes: G02B 1/041 Lenses
• CPC Class Codes: G02B 13/001 Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras G02B23/243 takes precedence
• CPC Class Codes: G02B 13/0045 having five or more lenses
• 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 13/06 Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
• CPC Class Codes: G02B 7/021 for more than one lens
• CPC Class Codes: G02B 9/60 having five components only
• CPC Class Codes: G03B 17/00 Details of cameras or camera bodies; Accessories therefor lens hoods or caps G03B11/04
• 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 23/50 Constructional details
• CPC Class Codes: H04N 23/54 Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils

Abstract

The presently disclosed subject matter includes a mobile electronic comprising an integrated camera, comprising a Wide camera unit comprising a Wide lens unit, and a Telephoto camera unit comprising a telephoto lens unit, the telephoto lens unit and the wide lens unit having respectively TTL/EFL ratios smaller and larger than 1 and defining separate telephoto and wide optical paths.

Claims

1. A mobile electronic device comprising an integrated camera, wherein the camera comprises a Wide camera unit comprising a Wide lens unit and a Telephoto camera unit comprising a Telephoto lens unit, the Telephoto lens unit and the Wide lens unit having respectively TTL/EFL ratios smaller and larger than 1 and defining separate Telephoto and Wide optical paths.

2. The mobile electronic device of claim 1, wherein light receiving outer surfaces of the Wide and Telephoto lens units are located substantially in the same plane, thereby reducing shadowing and light blocking effects therebetween.

3. The mobile electronic device of claim 1, wherein the Wide and Telephoto camera units are mounted on separate printed circuit boards.

4. The mobile electronic device of claim 3, wherein the printed circuit boards are located in different spaced-apart substantially parallel planes.

5. The mobile electronic device of claim 1, wherein the Wide and Telephoto camera units are mounted directly on a single printed circuit board.

6. The mobile electronic device of claim 1, wherein the Wide and Telephoto camera units are spaced from one another a distance d of about 1 mm.

8. The mobile electronic device of claim 1, wherein the Telephoto lens unit has a TTL less than 6.5 mm.

9. The mobile electronic device of claim 8, wherein the Telephoto lens has TTL is less than 5.9 mm.

10. The mobile electronic device of claim 1, wherein the Telephoto lens unit comprises multiple lens elements made of at least two different polymer materials having different Abbe numbers, wherein the multiple lens elements comprise a first group of at least three lens elements configured to form a telephoto lens assembly, and a second group of at least two lens elements wherein the second group of at least two lens elements is spaced from the telephoto lens assembly by a predetermined effective gap equal to or larger than ⅕

of the TTL of the Telephoto lens unit.

11. The mobile electronic device of claim 10, wherein the at least two different polymer materials comprise at least one plastic material with the Abbe number larger than 50, and at least one plastic material with the Abbe number smaller than 30.

12. The mobile electronic device of claim 10, wherein the first group of at least three lens elements comprises, in order from an object plane to an image plane along an optical axis of the telephoto lens unit, a first lens having positive optical power and a pair of second and third lenses having together negative optical power such that the telephoto lens assembly provides a telephoto optical effect of the telephoto lens unit, and such that the second and third lenses are each made of one of the at least two different polymer materials having a different Abbe number, for reducing chromatic aberrations of the telephoto lens, and wherein the second group of lens elements is configured to correct field curvature of the telephoto lens assembly and comprises two or more of the lens elements made of the different polymer materials respectively having different Abbe numbers and is configured to compensate for residual chromatic aberrations of the telephoto lens assembly dispersed during light passage through the effective gap between the telephoto and field lens assemblies.

13. The mobile electronic device of claim 12, wherein the first, third and fifth lens elements have each an Abbe number greater than 50, and the second and fourth lens elements have each an Abbe number smaller than 30.

16. The mobile electronic device of claim 10, wherein the Telephoto lens unit has a TTL smaller than 5.5 mm, an EFL larger than 5.9 mm, and an optical diameter smaller than 4 mm, thereby enabling to provide an image on an entire area of a ¼

″

image sensor.

17. The mobile electronic device of claim 10, wherein the Telephoto lens unit has a TTL smaller than 6.2 mm, an EFL larger than 6.8 mm, and an optical diameter smaller than 5 mm, thereby enabling to provide an image on an entire area of a ⅓

″

image sensor.

20. The mobile electronic device of claim 1, wherein the Telephoto lens unit is smaller than 0.9.

21. The mobile electronic device of claim 8, wherein the Telephoto TTL is less than 5.5 mm.

22. The mobile electronic device of claim 1, wherein the Telephoto lens unit EFL is greater than 5.9 mm.

23. The mobile electronic device of claim 1, wherein the Telephoto lens unit EFL is greater than 6.8 mm.

24. The mobile electronic device of claim 1, wherein the Telephoto lens unit has a field of view no larger than 44 degrees.

25. The mobile electronic device of claim 10, wherein the Telephoto lens unit has a field of view no larger than 44 degrees.

27. The mobile electronic device of claim 20, wherein the Telephoto lens unit EFL is greater than 5.9 mm.

28. The mobile electronic device of claim 20, wherein the Telephoto lens unit EFL is greater than 6.8 mm.

7. (canceled)

14. (canceled)

15. The mobile electronic device of claim 14, wherein the lens elements of the field lens assembly are spaced from one another an effective air gap smaller than 1/50 of the TTL of the Telephoto lens unit.

18. A camera for integrating in a mobile electronic device, the camera comprising a Wide camera unit and a Telephoto camera unit comprising respectively a Wide lens unit and a Telephoto lens unit having TTL/EFL ratios larger and smaller than 1, respectively, and defining wide and telephoto optical paths.

19. The camera of claim 18, wherein lens elements of at least the Telephoto lens unit are made of one or more polymer materials.

26. The camera of claim 19, wherein the Telephoto lens unit has a field of view no larger than 44 degrees.