Optical lens-element system for a supplementary lens in front of a camera module of an electronic device

1. A supplementary lens system for providing at least one supplementary lens in front of a camera module of an electronic device, the supplementary lens system comprising:

an object-side lens-element unit having a positive refractive power; and

an image-side lens-element unit having a positive refractive power,

wherein:

the object-side lens-element unit and the image-side lens-element unit are configured to generate an intermediate image between the object-side lens-element unit and the image-side lens-element unit,

the supplementary lens system has an object-side supplementary lens and an image-side supplementary lens, and

the object-side and the image-side supplementary lenses are couplable to one another.

2. The supplementary lens system according to claim 1 , wherein:

the object-side lens-element unit has a first focal length f1,

the image-side lens-element unit has a second focal length f2,

the object-side lens-element unit and the image-side lens-element unit have a distance d from one another, and

a sum of the first and second focal lengths is equal to the distance d defined by principal planes of the object-side and the image-side lens-element units in accordance with the equation:

f 1+ f 2= d.

3. The supplementary lens system according to claim 2 , wherein the intermediate image is generated at a site spaced apart from a principal plane of the object-side lens-element unit by the first focal length f1 and spaced apart from a principal plane of the image-side lens-element unit by the second focal length f2.

4. The supplementary lens system according to claim 1 , wherein the supplementary lens system has an afocal design.

5. The supplementary lens system according to claim 1 , wherein the object-side lens-element unit and the image-side lens-element unit are matched to one another with respect to at least one of telecentricity, numerical aperture, and field dimension.

6. The supplementary lens system according to claim 1 , wherein at least one of the object-side lens-element unit and the image-side lens-element unit are configured to permit a chief ray to include an angle of less than or equal to 15° with an optical axis of a respective lens-element unit.

7. The supplementary lens system according to claim 1 , wherein at least one of the object-side lens-element unit and the image-side lens-element unit are configured to permit a chief ray to include an angle of less than or equal to 10° with an optical axis of a respective lens-element unit.

8. The supplementary lens system according to claim 1 , wherein at least one of the object-side lens-element unit and the image-side lens-element unit are configured to permit a chief ray to include an angle of less than or equal to 5° with the optical axis of a respective lens-element unit.

9. The supplementary lens system according to claim 1 , wherein the object-side and the image-side supplementary lenses are couplable to one another by an interface and the interface is arranged in a region of the intermediate image.

10. The supplementary lens system according to claim 9 , further comprising a field intervention apparatus, wherein the field intervention apparatus is arrangeable in a region of the intermediate image.

11. The supplementary lens system according to claim 10 , wherein the field intervention apparatus comprises at least one of a greyscale filter, a microlens array, and a field curvature plate.

12. The supplementary lens system according to claim 10 , wherein the field intervention apparatus is couplable to the interface.

13. A field intervention apparatus for a supplementary lens system according to claim 10 .

14. The supplementary lens system according to claim 1 , wherein a pupil intervention apparatus is provided on an image side of the image-side lens-element unit.

15. The supplementary lens system according to claim 14 , wherein the pupil intervention apparatus comprises a pupil forming apparatus, an apodization filter, or a correction element.

16. The supplementary lens system according to claim 14 , wherein the pupil intervention apparatus is couplable to an interface.

17. A pupil intervention apparatus for a supplementary lens system according to claim 14 .

18. The supplementary lens system according to claim 1 , wherein the object-side supplementary lens is configured as at least one of an imaging lens, a wide-angle lens, a telephoto lens, a zoom lens, a microscope objective, or a macro lens.

19. A supplementary lens for a supplementary lens system according to claim 1 .

20. A supplementary lens according to claim 19 , configured to permit the supplementary lens together with a camera module to generate an image with a scale of 1:0.5 up to 1:2.

21. The supplementary lens according to claim 19 , wherein the supplementary lens is an image-side supplementary lens and forms a relay optical unit together with the camera module.

22. The supplementary lens according to claim 19 , further comprising a receiving apparatus for an object carrier.

23. The supplementary lens according to claim 22 , wherein the object carrier is configured to be couplable to the interface.

24. An object carrier for a supplementary lens according to claim 19 .

25. An illumination system for a supplementary lens according to claim 19 , wherein the illumination system is couplable to an interface.

26. The illumination system according to claim 25 , wherein the illumination system includes at least one of an aperture stop and a radiant field stop.

27. The illumination system according to claim 25 , wherein the illumination system includes an illumination aperture which is adaptable to the lens aperture and/or a size of the illuminated object field is adaptable.