Plastic lens element, plastic annular optical element, lens module and electronic device
AssigneeLargan Precision Co., Ltd.
InventorMing-Ta Chou
Life of this patent
Estimating the term…
Abstract
A plastic lens element includes an optical effective portion and a lens peripheral portion in order from a central axis to an edge of the plastic lens element. The lens peripheral portion surrounds the optical effective portion and includes a plurality of curve-shaped strip structures. Each of the curve-shaped strip structures is located and extended along a radial direction of the central axis. Each of the curve-shaped strip structures is curved in a concave form. The curve-shaped strip structures are prearranged in a circumferential direction of the central axis and around the optical effective portion. The curve-shaped strip structures are not directly connected to the optical effective portion.
Claims23
A plastic lens element comprising, in order from a central axis to an edge thereof:
- an optical effective portion;
- and
- a lens peripheral portion surrounding the optical effective portion and comprising:
- a plurality of curve-shaped strip structures, wherein each of the curve-shaped strip structures is located and extended along a radial direction of the central axis, each of the curve-shaped strip structures is curved in a concave form, the curve-shaped strip structures are prearranged in a circumferential direction of the central axis and around the optical effective portion, and the curve-shaped strip structures are not directly connected to the optical effective portion;
- wherein a number of the curve-shaped strip structures is greater than or equal to 105, and smaller than or equal to 380;
- wherein the plastic lens element is made by an injection molding method, an injection molding shrinkage rate of the plastic lens element is S, and the following condition is satisfied:
- 0.05%<S<1.4%.
A plastic annular optical element, comprising:
- an outer diameter surface surrounding a central axis of the plastic annular optical element;
- and
- an inner annular surface surrounding the central axis and forming a central hole, wherein the inner annular surface comprises:
- a plurality of curve-shaped strip structures, wherein each of the curve-shaped strip structures is located and extended along a radial direction of the central axis, each of the curve-shaped strip structures is curved in a concave form, and the curve-shaped strip structures are prearranged in a circumferential direction of the central axis and around the central hole;
- wherein a number of the curve-shaped strip structures is greater than or equal to 105, and smaller than or equal to 380;
- wherein the plastic annular optical element is made by an injection molding method, an injection molding shrinkage rate of the plastic annular optical element is S, and the following condition is satisfied:
- 0.05%<S<1.4%.
Dependencies are inferred from the claim text.