TWI582514B - Shielding Plate Of Lens Structure And Lens Structure - Google Patents

Description

Lens structure and lens structure of lens structure

The present invention relates to a light shielding sheet for an optical lens and an optical lens.

Generally, an optical lens is usually provided with a light shielding film to reduce scattered light, and the light shielding film is usually circular in shape and has a hole in the center for light to pass through. However, since the light shielding film is sandwiched between the lens holder and the lens, Stress is generated by the pushing of the lens, and the lens is also subjected to the reaction force of the light shielding sheet, and there is a problem that the lens cannot be accurately mounted.

Therefore, how to reduce the stress on the visor is a very important issue in improving imaging performance.

The main object of the present invention is to provide a lens structure lens and an optical lens, which can effectively reduce the stress of the lens after assembly, and ensure that the light shielding film can be accurately mounted in the lens.

In order to achieve the above object, the present invention provides a lens structure lens comprising a body having a through hole in the center thereof, the body defining a center, the body being divided into at least two major diameter portions and at least two at a central angle of the center of the circle a small diameter portion, the large diameter portions and the small diameter portions are staggered around the center of the circle, and a distance from each of the large diameter portions farthest from the center of the circle to the center of the circle is greater than a distance from the center of the small diameter portion to the center of the circle The distance is such that the periphery of the light shielding sheet is non-circular.

In order to achieve the above object, the present invention also provides a lens structure comprising the above-mentioned light shielding sheet, a lens holder and at least one lens, and the light shielding sheet is sandwiched between the lens holder and the lens.

Thereby, the light shielding sheet provided by the invention can reduce the stress generated by pressing the lenses with each other, thereby ensuring the positioning and accuracy of the assembly and improving the optical performance.

The following is a description of the possible embodiments of the present invention, and is not intended to limit the scope of the invention as claimed.

Referring to FIG. 1 , FIG. 3 , and FIG. 5 , the present invention provides a light shielding sheet for a lens structure, which comprises a body 10 , 20 , 30 , and the body 10 , 20 , 30 can be any material such as plastic or metal. The central portion 20, 30 has a through hole 11, 21, 31. The body 10, 20, 30 defines a center 111, 211, 311. The body 10, 20, 30 is divided into at least a central angle of the centers 111, 211, 311. Two large diameter portions 12, 22, 32 and at least two small diameter portions 13, 23, 33, and the large diameter portions 12, 22, 32 and the small diameter portions 13, 23, 33 are interlaced around the centers 111, 211, and 311 Arranged, the distance from each of the large diameter portions 12, 22, 32 farthest from the centers 111, 211, 311 to the centers 111, 211, 311 is greater than each of the small diameter portions 13, 23, 33 farthest from the center 111, 211 The distance from the 311 to the centers 111, 211, and 311 is such that the periphery of the light shielding sheet is non-circular. Preferably, the central angles of the large diameter portions 12, 22, and 32 are the same, and the central angles of the small diameter portions 13, 23, and 33 are also the same, and each of the large diameter portions 12 and 22 The 32 and each of the small diameter portions 13, 23, and 33 are arcuately farthest from the centers 111, 211, and 311.

In particular, in the first embodiment, the number of the large diameter portion 12 and the small diameter portion 13 are respectively 4. However, as shown in FIG. 2, the body 10a, 10b, 10c, 10d may also be used. 10e, 10f, 10g may have different numbers of large diameter portions or small diameter portions. Of course, it is also not limited to the multi-lobed shape shown in FIG. 1, and a triangle or even a polygon may conform to the definition of the present invention to achieve a similar effect.

In addition, referring to FIG. 3 and FIG. 4, in this embodiment, the inner peripheral surface of the through hole 21 of the body 20, 20a, 20b, 20c, 20d, 20e, 20f, 20g forms a plurality of grooves radially toward the periphery. The recesses and the inner surface of the perforations form a plurality of relief microstructures 212 to help reduce scattered light.

Even as shown in FIG. 5 and FIG. 6, the body 30, 30a, 30b, 30c, 30d, 30e, 30f defines a core 311 passing through the center 301 and perpendicular to the body 30, 30a, 30b, 30c, 30d, 30e, The body 30, 30a, 30b, 30c, 30d, 30e, 30f is formed with a protrusion 34 around the through hole 31, and the protrusion 34 is convex along the axis to make the hole 31 and the body 30. , 30a, 30b, 30c, 30d, 30e, 30f are not in the same plane except for the protruding portion 34, thereby engaging the protruding lens, preferably, the body 30, 30a, 30b, 30c, 30d The inner edge surface of the perforation 31 of 30e, 30f forms a plurality of grooves radially toward the circumference, and the grooves and the inner surface of the perforation form a plurality of concave and convex microstructures 312.

Referring to FIG. 7 to FIG. 9 , the present invention also provides a lens structure including the above-mentioned light shielding sheet (represented by the body 30 of FIG. 5 in this embodiment), and includes a lens holder 40 and at least one lens 50 . The light shielding sheet is interposed between the lens holder 40 and the lens 50. Specifically, the light shielding film is bound between the lens holder and the first lens, and more specifically, the front end of the lens holder 40. Forming an opening, the central portion of the lens 50 has an optical portion, the opening, the through hole and the optical portion are corresponding to each other, and the large diameter portion 32 is sandwiched by the lens holder 40 and the lens 50, The position of the body 30 is fixed.

Regarding the actual performance of the light shielding sheet provided by the present invention, please refer to FIG. 10 to FIG. 12, in the same condition as the present invention (the right side of FIGS. 10 to 12) and the conventional circular light shielding sheet (the left side of FIGS. 10 to 12). Under the stress distribution obtained by the experiment, it can be seen that the circumference of the general circular louver is circular, so that the circumference of the opatable sheet is fully pressed by the first lens in the lens structure, and the visor is subjected to the stress. It is relatively large, so it can be seen from the figure that the stress near the perforation of the circular opaque sheet is obviously quite high, and the peripheral portion of the visor of the present invention is cut off to form at least two large diameter portions, and only the large diameter portion is The first lens in the lens structure is pressed into contact with the first lens in the lens structure, so that the overall stress of the light shielding film of the invention having a non-circular design is lower than that of the conventional circular light shielding film, and the light shielding film of the invention can be used to reduce the stress. Great results.

In summary, the light shielding sheet provided by the invention can effectively reduce the stress generated by the extrusion of the lens, ensure the precise installation of the lens and the parts, thereby improving the imaging performance and improving the effect.

10, 10a, 10b, 10c, 10d, 10e, 10f, 10g‧‧‧ ontology

11‧‧‧Perforation

111‧‧‧ Center

12‧‧‧The Great Trails Department

13‧‧‧Little Trails Department

20, 20a, 20b, 20c, 20d, 20e, 20f, 20g‧‧‧ ontology

21‧‧‧Perforation

211‧‧‧ Center

212‧‧‧Microstructure

22‧‧‧The Great Trails Department

23‧‧‧ Small Trails Department

30, 30a, 30b, 30c, 30d, 30e, 30f‧‧‧ ontology

31‧‧‧Perforation

311‧‧‧ Center

312‧‧‧Microstructure

32‧‧‧The Great Trails Department

33‧‧‧The Small Trails Department

34‧‧‧Protruding

40‧‧‧ lens mount

50‧‧‧ lenses

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a perspective view of a light shielding sheet of the present invention. Figure 2 is a front elevational view of another embodiment of the visor of the present invention. Figure 3 is a perspective view of a light shielding sheet according to a second embodiment of the present invention. Fig. 4 is a front elevational view showing another embodiment of the light shielding sheet of the second embodiment of the present invention. Figure 5 is a perspective view of a light shielding sheet according to a third embodiment of the present invention. Fig. 6 is a front elevational view showing another embodiment of the light shielding sheet of the third embodiment of the present invention. Figure 7 is an exploded perspective view of the lens structure of the present invention. Figure 8 is a front elevational view of the lens structure of the present invention. Figure 9 is a cross-sectional view showing the lens structure of the present invention. 10 to 12 are graphs showing the stress distribution of the light shielding sheet of the present invention and the conventional light shielding sheet.

10‧‧‧ Ontology

11‧‧‧Perforation

111‧‧‧ Center

12‧‧‧The Great Trails Department

13‧‧‧Little Trails Department

Claims (8)

A light shielding sheet of a lens structure, comprising: a body having a through hole in a center thereof, the body defining a center, the body being divided into at least two major diameter portions and at least two small diameter portions by a central angle of the center of the circle, the large diameters And the small diameter portions are staggered around the center of the circle, and the distance from the center of the large diameter portion farthest from the center of the circle to the center of the small diameter portion is farthest from the center of the small portion to the center of the circle, so that the periphery of the light shielding sheet It is non-circular; wherein each of the large diameter portions and each of the small diameter portions are arcuately farthest from the center of the circle. The light shielding sheet of the lens structure according to claim 1, wherein the central angles of the large diameter portions are the same, and the central angles of the small diameter portions are also the same. The light shielding sheet of the lens structure according to any one of claims 1 to 2, wherein the body defines an axis passing through the center and perpendicular to the body, the body forming a protrusion around the hole, the protrusion The projection is raised along the axis such that the perforation is not in the same plane as the portion of the body other than the projection. The light shielding sheet of the lens structure according to any one of claims 1 to 2, wherein the inner surface of the perforation is formed with a plurality of grooves radially toward the periphery, and the grooves and the inner surface of the perforation form a plurality of concavities and convexities. The microstructure. A lens structure comprising: a light shielding film, the light shielding film comprises a body, the body has a perforation in the center, the body defines a center, and the body is divided into at least two major diameter portions and at least two small diameters by a central angle of the center of the center The large-diameter portion and the small-diameter portions are staggered around the center of the circle, and the distance from the center of the large-diameter portion farthest from the center of the circle to the center of the circle is greater than the distance from the center of the small-diameter portion to the center of the circle. Making the periphery of the light shielding sheet non-circular; a lens holder; at least one lens; The light shielding sheet is interposed between the lens holder and the lens; wherein each of the large diameter portions and each of the small diameter portions are arcuately farthest from the center of the circle. The lens structure according to claim 5, wherein the central angles of the large diameter portions are the same, and the central angles of the small diameter portions are also the same. The lens structure according to any one of claims 5 to 6, wherein the body defines an axis passing through the center and perpendicular to the body, the body is formed with a protrusion around the hole, the protrusion is along The axis is raised such that the perforations are not in the same plane as the portion of the body other than the projection. The lens structure according to any one of claims 5 to 6, wherein the perforated inner edge surface forms a plurality of grooves radially toward the periphery, and the grooves and the inner surface of the perforations form a plurality of concave and convex microstructures. .