Plastic optical lens

Abstract

This invention provides a plastic optical lens comprising an optical portion through which a central axis passes and an assembly portion surrounding the optical portion. The assembly portion includes a first surface facing a first side, an annular lens barrel assembly surface, a second surface facing a second side and connected to the annular lens barrel assembly surface, and a gate cutting surface connected to the annular lens barrel assembly surface. The plastic optical lens may optionally form a conical structure in the assembly portion or at least a gradient structure in the second surface. By controlling the position and structure of the conical or gradient structure, this invention helps to reduce resistance generated at different positions of the plastic optical lens during demolding, improve molding accuracy, and thus increase molding yield, while also ensuring assembly quality.

Claims

1. A plastic optical lens, comprising: an optical portion passing through a central axis; and an assembly portion surrounding the optical portion, the assembly portion comprising: a first surface facing a first side; an annular lens barrel assembly surface; a second surface facing a second side and connected to the annular lens barrel assembly surface; a gate cut-off surface connected to the annular lens barrel assembly surface; and a conical structure located within a first radial range centered on the central axis and connected to the first surface and the annular lens barrel assembly surface, the first radial range including at least a second radial range located between the gate cut-off surface and the first surface, the conical structure comprising an annular plane and a conical surface, the conical surface being connected to the annular plane and the annular lens barrel assembly surface, the annular plane being connected to the first surface, and the junction of the conical surface and the annular plane forming a maximum radius of the lens, satisfying 2.600≦Wcb / Wc≦11.700, where Wc is the maximum width of the conical structure parallel to the central axis, Wcb is the maximum width of the annular lens tube assembly surface parallel to the central axis, the first radial range forms at least one central angle with the central axis, the sum of the central angles is θc, and satisfies 0.055≦θc / 360 degrees≦0.

920.

2. The plastic optical lens as described in claim 1 further satisfies 1.300≦(Wc+Wcb) / Wcp≦11.000, where Wcp is the maximum width of the annular plane in a radial direction centered on the central axis.

3. The plastic optical lens as described in claim 1 further satisfies 0.250≦Wc / Wcp≦2.500, where Wcp is the maximum width of the annular plane in a radial direction centered on the central axis.

4. A plastic optical lens, comprising: an optical portion through which a central axis passes; and an assembly portion surrounding the optical portion, the assembly portion comprising: a first surface facing a first side; an annular lens barrel assembly surface; and a second surface facing a second side and connected to the annular lens barrel assembly surface; A gate cut-off surface is connected to the annular lens barrel assembly surface; and a conical structure is located within a first radial range centered on the central axis and connected to the first surface and the annular lens barrel assembly surface. The first radial range includes at least a second radial range located between the gate cut-off surface and the annular lens barrel assembly surface. The conical structure includes an annular plane and a conical surface. The conical surface is connected to the annular plane and the annular lens barrel assembly surface. The annular plane is connected to the first surface. The junction of the conical surface and the annular plane forms a maximum radius of the lens, satisfying 0.650≦Wcb / Tplup≦6.400, where Wcb is the maximum width of the annular lens barrel assembly surface parallel to the central axis, and Tplup is the maximum distance from the annular plane to the first surface. The first radial range forms at least one central angle with the central axis, the sum of which is θc, and satisfies 0.055≦θc / 360 degrees≦0.

920.

5. The plastic optical lens as described in claim 4 further satisfies 0.560≦Wcb / (Tplup+Wc)≦2.250, where Wc is the maximum width of the conical structure parallel to the central axis.

6. The plastic optical lens as described in claim 4 further satisfies 0.100≦Wc / (Ra max-Rc max)≦5.000, where Ra max is the maximum radius of the assembly part and Rc max is the maximum radius of the annular lens barrel assembly surface.

7. The plastic optical lens as described in claim 4 further satisfies 7.200≦Wa / Wc≦28.000, where Wa is the maximum thickness of the assembly parallel to the central axis, and Wc is the maximum width of the conical structure parallel to the central axis.

8. The plastic optical lens as described in claim 1 or 4, wherein the second surface includes at least one gradient structure located near the gate cut surface and connected to the annular lens barrel assembly surface, the at least one gradient structure including at least a first surface closer to the annular lens barrel assembly surface and a second surface farther from the annular lens barrel assembly surface, the angle between the tangents of the first and second surfaces and the central axis being both within 10 to 50 degrees, and the angle between the tangent of the first surface and the central axis being smaller than the angle between the tangent of the second surface and the central axis.

9. The plastic optical lens as described in claim 8, wherein the at least one gradient structure includes at least the gate cut-off surface.

10. The plastic optical lens as claimed in claim 8, wherein the at least one gradient structure is disposed adjacent to the gate cut surface and at a distance from the gate cut surface, and the distance is at least close to zero.

11. The plastic optical lens as described in claim 8, wherein, The at least one gradient structure forms another central angle with the central axis, the sum of which is θgs, and satisfies 0.055≦θgs / 360 degrees≦0.

920.

12. The plastic optical lens as described in claim 11, wherein the sum of the other central angles θgs is not greater than 180 degrees.

13. A plastic optical lens, comprising: an optical portion through which a central axis passes; and an assembly portion surrounding the optical portion, the assembly portion comprising: a first surface facing a first side; an annular lens barrel assembly surface connected to the first surface and parallel to the central axis; a gate cutting surface connected to the annular lens barrel assembly surface; and a second surface facing a second side and connected to the annular lens barrel assembly surface, the second surface comprising at least one gradient structure, the at least one gradient structure being located near the gate cutting surface and connected to the annular lens barrel assembly surface, the at least one gradient structure comprising a first surface farther from the annular lens barrel assembly surface and a second surface closer to the annular lens barrel assembly surface, the angle between the tangents of the first and second surfaces and the central axis being both within 10 to 45 degrees, and the... The angle between the tangent of the first surface and the central axis is greater than the angle between the tangent of the second surface and the central axis. The at least one gradient structure forms at least one central angle with the central axis. The sum of the central angles is θgs, and satisfies 0.055≦θgs / 360 degrees≦0.920 and 0.300≦Wcb / Wgs≦2.250, where Wcb is the maximum width of the annular lens assembly surface parallel to the central axis, and Wgs is the maximum width of the at least one gradient structure parallel to the central axis.

14. The plastic optical lens as described in claim 13, wherein the at least one gradient structure includes at least the gate cut-off surface.

15. The plastic optical lens as claimed in claim 13, wherein the at least one gradient structure is disposed adjacent to the gate cut surface and at a distance from the gate cut surface, and the distance is at least close to zero.

16. The plastic optical lens as described in claim 13, wherein the sum of the central angles θgs is not greater than 180 degrees.

17. The plastic optical lens as described in claim 13 further satisfies 2.100≦Wa / Wgs≦5.000, where Wa is the maximum thickness of the assembly parallel to the central axis.

18. The plastic optical lens as described in any one of claims 1, 4, and 13 further satisfies 2.200≦Wa / Wcb≦6.700, where Wa is the maximum thickness of the assembly parallel to the central axis.

19. The plastic optical lens as described in any one of claims 1, 4, and 13 further satisfies 1.170≦Ra max / Ro min≦5.000, where Ra max is the maximum radius of the assembly and Ro min is the minimum radius of the optical part.

20. The plastic optical lens as described in any one of claims 1, 4, and 13 further satisfies 1.500 ≤ Ra max / CT max ≤ 4.350, where Ra max is the maximum radius of the assembly and CT max is the maximum thickness of the plastic optical lens on the central axis.

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