Under-screen camera assembly, camera module, optical lens and manufacturing method thereof
An optical lens ( 1000 ) includes a first lens ( 110 ) and a second lens component ( 200 ). A central area of a first surface ( 112 ) of the first lens ( 110 ) protrudes to an object side to form a protrusion portion ( 111 ), and a top surface ( 113 ) of the protrusion portion ( 111 ) forms an optical area ( 113 a ), and a first structural area ( 115 ) surrounds the protrusion portion ( 111 ). The second lens component ( 200 ) includes a second lens barrel ( 220 ) and at least one second lens ( 210 ), and a top of the second lens barrel ( 220 ) is provided with an extension portion ( 221 ) extending inwards, so as to form a light inlet hole ( 222 ) of the second lens component ( 200 ). Moreover, the topmost second lens ( 210 ) has a third surface ( 211 ) located at the object side, and the third surface ( 211 ) includes an optical area ( 211 a ) at center, an inner structural area ( 211 b ) surrounding the optical area ( 211 a ), and an outer structural area ( 211 c ). The outer structural area ( 211 c ) presses against the bottom surface of the extension portion ( 221 ), and the inner structural area ( 211 b ) is exposed outside the extension portion ( 221 ). The first lens ( 110 ) is bonded to the second lens component ( 200 ), and an outer diameter of the first lens ( 110 ) is not greater than a diameter of the light inlet hole ( 222 ). According to the optical lens ( 1000 ), a diameter of a hole provided on a screen can be reduced without sacrificing the imaging quality. Also disclosed are a camera module, an under-screen camera assembly, a manufacturing method of the optical lens ( 1000 ), and a manufacturing method of the camera module.
1. An optical lens, characterized by comprising:
a first lens having a first surface on an object side and a second surface on an image side, wherein a central area of the first surface protrudes toward the object side to form a protrusion portion, and a top surface of the protrusion portion forms an optical area for imaging, and the first surface further has a first structure area surrounding the protrusion portion, and a side surface of the protrusion portion extending upwards from and perpendicular to the first structure area connects the optical area and the first structure area; and
a second lens component including a second lens barrel and at least one second lens mounted inside the second lens barrel, wherein the at least one second lens and the first lens together form an imagable optical system, and a top of the second lens barrel has an extension portion formed by extending inwardly, and a center part of the extension portion is formed with a light inlet hole of the second lens component, and the topmost second lens of the at least one second lens has a third surface on the object side and a fourth surface on the image side, and the third surface includes an optical area at center, an inner structure area surrounding the optical area, and an outer structure area surrounding the inner structure area, and the outer structure area bears against a bottom surface of the extension portion, and the inner structure area is exposed outside the extension portion;
wherein, the first lens is adhered with the second lens component,
a diameter of a cross section of the protrusion portion is 1.0-2.0 mm,
a height of the protrusion portion is 0.3-1.5 mm, and
a ratio of the diameter of the cross section of the protrusion portion to an aperture of a light inlet hole of the second lens barrel is 0.3-0.6.
2. The optical lens according to claim 1 , wherein the inner structure area and the outer structure area are both planes, and the inner structure area and the outer structure area are perpendicular to an optical axis of the second lens, and the inner structure area is an adhesive dispensing area, and the second surface of the first lens is bonded to the adhesive dispensing area of the topmost second lens.
3. The optical lens according to claim 1 , wherein a position of the first structure area is higher than a top surface of the second lens barrel.
4. The optical lens according to claim 1 , wherein the first lens and the second lens component are bonded by a first adhesive material, and the first adhesive material is cured to support the first lens and the second lens component so that relative positions of the first lens and the second lens component are maintained at relative positions determined by an active calibration, and the active calibration is a process of adjusting the relative positions of the first lens and the second lens component according to an actual imaging result of the optical system, and a central axis of the first lens and a central axis of the second lens component have an included angle that is not zero.
5. The optical lens according to claim 4 , wherein the second surface has an optical area for imaging and a second structural area surrounding the optical area, and a position of the second structure area is lower than the top surface of the second lens barrel, and the first adhesive material is located between an outer side surface of the first lens and the extension portion.
6. The optical lens according to claim 3 , wherein in the third surface, a position of the inner structure area is higher than that of the outer structure area, and the inner structure area is connected to the outer structure area through a connecting area.
7. The optical lens according to claim 6 , wherein a light-shielding layer is attached to the connecting area.
8. The optical lens according to claim 1 , wherein a light-shielding layer is attached to the side surface of the protrusion portion, the first structure area, and an outer side surface of the first lens.
9. The optical lens according to claim 1 , wherein the first lens is a single lens or a composite lens formed by interfitting a plurality of sub-lenses, and there are a plurality of the second lenses and the plurality of the second lenses are assembled together by the second lens barrel.
10. The optical lens according to claim 1 , wherein each of at least two adjacent second lenses have an optical area, an inner structure area surrounding the optical area, and an outer structure area surrounding the inner structure area, and a position of the inner structure area is higher than that of the outer structure area, and the outer structure area is connected to the outer structure area by an inclined connecting area, and the at least two adjacent second lenses are fitting, and a SOMA sheet is provided between the at least two adjacent second lenses, and the SOMA sheet is located between the two inner structure areas or between the two outer structure areas.
11. The optical lens according to claim 1 , wherein a top surface of the protrusion portion has a transition area, and the transition area is located at an edge of the top surface, and the transition area is attached with a light-shielding layer.
12. The optical lens according to claim 1 , wherein one or more of the side surface of the protrusion portion, the first structure area, and the outer side surface of the first lens are subjected to a surface roughening treatment.
13. The optical lens according to claim 1 , wherein the second lens barrel or an outer side surface of the first lens includes at least one cutting surface.
14. The optical lens according to claim 1 , wherein the optical lens further includes a light-shielding member including an annular light-shielding portion, and the annular light-shielding portion is provided above the first structure area.
15. The optical lens according to claim 14 , wherein the light-shielding member is an annular SOMA sheet, and the SOMA sheet is bonded to the first structure area.
16. The optical lens according to claim 14 , wherein the light-shielding member is a first lens barrel, and a bottom surface of the first lens barrel is bonded to a top surface of the second lens barrel, and a top portion of the first lens barrel extends toward the first lens to form the annular light-shielding portion.
17. The optical lens according to claim 16 , wherein there is no adhesive material provided between the annular light-shielding portion and the first structure area.
18. A camera module, characterized by comprising:
the optical lens of claim 1 ; and
a photosensitive assembly, wherein the optical lens is mounted on the photosensitive assembly.
19. An under-screen camera assembly, characterized by comprising:
a display screen having a light-through hole; and
the camera module of claim 18 , wherein the protrusion portion of the camera module extends into the light-through hole.