TW202041952A - Lens With Shielding Structure And Lens Module - Google Patents

Abstract

A lens with shielding structure includes a main body. The main body defines an axial direction. The main body includes an optical portion and a shielding portion. The optical portion is located at the center of the main body. The shielding portion is ring-shaped to surround the optical portion. The shielding portion includes a microstructure and a shielding layer. The microstructure includes a plurality of recesses formed on the main body. The shielding layer is coated on the microstructure to fill the recesses up.

Description

Lens and lens structure with shading structure

The present invention relates to a lens with a shading structure and a lens structure.

The conventional lens structure includes a lens holder and a plurality of lenses. The lenses are arranged coaxially with each other in the lens holder, and imaging is achieved by different light-gathering and astigmatism effects. Among them, in order to prevent stray light from interfering with the imaging, the imaging effect It is not good. It is often used to sandwich the non-optical part of each lens, as disclosed in the patent TWI628484, to absorb stray light, enhance the light-gathering effect, and improve imaging.

However, a lens structure has at least three to four lenses, and as many as more than ten lenses. If a light shield is inserted between each lens, the overall thickness of the lens will be greatly increased, which is not good for electronics. The thinness of the device makes the lens protruding and it is easily damaged by impact.

Therefore, how to reduce the thickness of the lens as much as possible while maintaining a good shading effect has become a very important issue in the industry.

The main purpose of the present invention is to provide a lens with a light-shielding structure and a lens structure, which can achieve a good light-shielding effect, and can reduce the thickness of the lens without a light-shielding film.

To achieve the above objective, the present invention provides a lens with a light-shielding structure, comprising a body defining an axial direction, the body including an optical part and a light-shielding part, the optical part is located in the center of the body, and the light-shielding part is It is ring-shaped and surrounds the optical part. The light-shielding part includes a microstructure and a light-shielding layer. The microstructure includes a plurality of recesses formed on the body. The light-shielding layer is coated on the microstructure to fill the recesses. full.

To achieve the above objective, the present invention further provides a lens structure including a lens mount and a plurality of lenses, at least one of the lenses is the above-mentioned lens with a light-shielding structure, and the lenses are coaxially arranged in the lens mount.

The following examples are only used to illustrate the possible implementation aspects of the present invention, but they are not intended to limit the scope of protection of the present invention, and are described first.

1-13, the present invention provides a lens with a light-shielding structure, including a body 10, 10a, 10b, 10c, the body 10, 10a, 10b, 10c defines an axial direction, the body 10, 10a, 10b , 10c includes an optical part 11 and a shading part 12, 12a, 12b, 12c, 12d, the optical part 11 is located in the center of the main body 10, 10a, 10b, 10c, the shading part 12, 12a, 12b, 12c, 12d It is ring-shaped and surrounds the optical portion 11, and the shading portion 12, 12a, 12b, 12c, 12d includes a microstructure 121, 121a, 121b, 121c, 121d and a shading layer 122, 122a, 122b, 122c, 122d , The microstructure 121, 121a, 121b, 121c, 121d includes a plurality of recesses formed on the main body 10, 10a, 10b, 10c, and the light shielding layer 122, 122a, 122b, 122c, 122d is coated on the microstructure 121, 121a , 121b, 121c, 121d and fill these recesses (for example, black ink or UV glue and other liquids are processed by precision coating equipment, and dried and cured by UV curing machine or oven); preferably, the body 10, 10a, 10b, and 10c further include a positioning portion 13 located outside the shading portions 12, 12a, 12b, 12c, 12d for contacting and positioning with other lenses and the lens mount 20; in addition, the The shading portions 12, 12a, 12b, 12c, 12d can be provided on only one side of the main body 10, 10a, 10b, 10c, or can be provided on both opposite sides of the main body 10, 10a, 10b, 10c.

The present invention also provides a lens structure, including a lens holder 20 and a plurality of lenses, at least one of the lenses is the above-mentioned lens with a light-shielding structure, and the lenses are coaxially arranged in the lens holder 20; in this embodiment Among them, the lenses include a plurality of the above-mentioned lenses with light-shielding structure, and there are also lenses with generally no light-shielding structure. In order to avoid interference and collision between the optical parts of the lenses, spacers 30 are arranged between adjacent lenses.

Regarding the microstructures 121, 121a, 121b, 121c, 121d, the recesses may be formed by laser engraving of a plurality of ring grooves extending around the axial direction and arranged at intervals, and the radial cross section of each ring groove is generally an inverted triangle , Rectangular, trapezoidal, semi-circular or other shapes, as shown in Figures 4 to 7; in other possible embodiments, the recesses can be evenly distributed to form a polygonal cone recessed shape, as shown in Figures 8 and 9 As shown, or a plurality of long grooves, the long grooves are arranged radially and extend along the radial direction of the body, as shown in FIG. 10 and FIG. 11; in addition, the recesses can also be used on the surface of the body It is formed by roughening it by sandblasting.

In particular, as shown in FIG. 3A, both ends of the microstructure in the radial direction may respectively have a raised stop 1211, and the two stop 1211 surround the concave part of the microstructure, and the The light-shielding layer 122 fills the space between the two blocking portions 1211, and the height H is approximately 15 to 25 μm. In addition, the cross-section of each blocking portion 1211 is generally triangular and one of the tips faces outwards. The angle θ of the outer tip is generally 40 to 135 degrees.

With the above structure, the lens with shading structure provided by the present invention can achieve the shading effect of reducing stray light, ensuring the concentration of the optical path and avoiding interference, but it does not need to set the shading plate to increase the thickness of the lens, so the thickness of the lens can be reduced (as shown in Fig. As shown in 13, at least only a single lens with a light-shielding structure can be installed in the thinner lens holder 20', thereby reducing the optical axis distance), which is very beneficial for installation in thin and light electronic devices. In addition, it can replace the lens The function of the aperture plate (aperture plate).

10, 10a, 10b, 10c: body 11: Optics Department 12, 12a, 12b, 12c, 12d: shading part 121, 121 a, 121b, 121c, 121d: microstructure 1211: Block 122, 122a, 122b, 122c, 122d: shading layer 13: Positioning department 20, 20’: lens mount 30: Gasket H: height θ: included angle

Figure 1 is a three-dimensional exploded view of the lens structure of the present invention. Figure 2 is a cross-sectional view of the lens structure of the present invention. Figure 3 is a partial enlarged view of Figure 2. Fig. 3A is a partial enlarged view of Fig. 3. Fig. 4 is a cross-sectional view of the lens with shading structure of the present invention. Figure 5 is a partial enlarged view of Figure 4. 6 is a partial cross-sectional view of the second embodiment of the lens with shading structure of the present invention. Fig. 7 is a partial cross-sectional view of the third embodiment of the lens with shading structure of the present invention. 8 is a cross-sectional view of the fourth embodiment of the lens with shading structure of the present invention. Figure 9 is a partial enlarged view of Figure 8. Fig. 10 is a schematic diagram of the fifth embodiment of the lens with shading structure of the present invention. Figure 11 is a partial cross-sectional view of Figure 10. FIG. 12 is a cross-sectional view of a lens structure according to another embodiment of the present invention. FIG. 13 is a cross-sectional view of a lens structure according to another embodiment of the present invention.

10: Lenses with shading structure

11: Optics Department

12: Shading part

13: Positioning department

20: lens mount

30: Gasket

Claims (10)

A lens with a shading structure, comprising a body defining an axial direction, the body comprising an optical part and a shading part, the optical part is located at the center of the body, the shading part is ring-shaped and surrounds the optical part Around, the light-shielding portion includes a microstructure and a light-shielding layer, the microstructure includes a plurality of recesses formed on the body, and the light-shielding layer is coated on the microstructure to fill the recesses. The lens with a light-shielding structure according to claim 1, wherein the concave portions of the microstructure are a plurality of annular grooves extending around the axial direction and arranged at intervals. The lens with a light-shielding structure according to claim 2, wherein the radial cross section of each ring groove is almost an inverted triangle. The lens having a light-shielding structure according to claim 2, wherein the radial cross section of each ring groove is generally rectangular. The lens with a light-shielding structure according to claim 2, wherein the radial cross section of each ring groove is trapezoidal. The lens having a light-shielding structure according to claim 1, wherein the concave portions of the microstructure are evenly distributed and are respectively polygonal cone concave shapes. The lens with a light-shielding structure according to claim 1, wherein the recesses of the microstructure are a plurality of long grooves, and the long grooves are arranged radially and extend along the radial direction of the body. The lens with a light-shielding structure according to any one of claims 1 to 7, wherein the main body further includes a positioning part, and the positioning part is located outside the light-shielding part. A lens structure includes a lens holder and a plurality of lenses, at least one of the lenses is the lens with a light-shielding structure according to any one of claims 1 to 7, and the lenses are coaxially arranged in the lens holder. The lens structure according to claim 9, wherein the main body further includes a positioning portion located outside the shading portion for contact positioning with the other lens and the lens mount.

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