TWI696858B - 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 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 sequentially arranged coaxially with each other on the lens holder, and different imaging and astigmatism effects are used to achieve imaging. Among them, in order to avoid stray light interference imaging, the imaging effect Poor, often use shading sheets sandwiched between the non-optical parts of each lens, as disclosed in the patent TWI628484, in order to absorb stray light, enhance the light-gathering effect, and improve imaging.

However, in a lens structure, there are at least three to four lenses, and more than ten lenses. If a light shield is interposed between each lens, the overall thickness of the lens will be greatly increased, which is not conducive to electronics The lightness and thinness of the device make it prone to impact and damage if the lens protrudes.

Therefore, how to reduce the lens thickness 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 sheet.

To achieve the above object, the present invention provides a lens with a light-shielding structure, including a body, the body defines an axis, the body includes an optical portion and a light-shielding portion, the optical portion is located in the center of the body, the light-shielding portion 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.

In order to achieve the above object, the present invention also provides a lens structure including a lens holder and a plurality of lenses. At least one of the lenses is the above-mentioned lens with a shading structure, and the lenses are coaxially arranged in the lens holder.

The following only illustrates the possible implementation forms of the present invention with examples, but it is not intended to limit the scope of the present invention to be protected, which will be described first.

1 to 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 axis, the body 10, 10a, 10b 10c includes an optical portion 11 and a light-shielding portion 12, 12a, 12b, 12c, 12d, the optical portion 11 is located in the center of the body 10, 10a, 10b, 10c, the light-shielding portion 12, 12a, 12b, 12c, 12d It is ring-shaped and surrounds the optical portion 11. The light-shielding portions 12, 12a, 12b, 12c, 12d include a microstructure 121, 121a, 121b, 121c, 121d and a light-shielding layer 122, 122a, 122b, 122c, 122d The microstructures 121, 121a, 121b, 121c, 121d include a plurality of recesses formed on the body 10, 10a, 10b, 10c, and the light shielding layers 122, 122a, 122b, 122c, 122d are coated on the microstructures 121, 121a , 121b, 121c, 121d and fill these recesses (for example, use black ink or UV glue and other liquids to process with precision coating equipment, and dry and solidify with UV curing machine or oven); preferably, the body 10, 10a, 10b, 10c further includes a positioning portion 13, the positioning portion 13 is located outside the shading portion 12, 12a, 12b, 12c, 12d for contact with other lenses and the lens holder 20 for positioning; in addition, the The shading portions 12, 12a, 12b, 12c, 12d may be provided on only one side of the body 10, 10a, 10b, 10c, or may be provided on opposite sides of the 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. The lenses are coaxially arranged in the lens holder 20; in this embodiment Among them, these lenses include a plurality of the above-mentioned lenses with a light-shielding structure, and also have lenses that generally do not have a light-shielding structure. In order to avoid interference and collision of the optical parts of the lenses, a spacer 30 is provided between adjacent lenses.

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

In particular, as shown in FIG. 3A, the radial ends of the microstructure may have a convex stop 1211, and the concave portion of the microstructure is surrounded between the two stops 1211, and the The shading layer 122 fills the space between the two baffles 1211, and the height H is approximately 15 to 25 μm. In addition, the cross-section of each baffle 1211 is generally triangular with one tip facing outward, and the baffle facing each other The angle θ of the outer tip is approximately 40 to 135 degrees.

With the above structure, the lens provided with a shading structure of the present invention can achieve the shading effect of reducing stray light, ensuring the concentration of the light path and avoiding interference, but without the need to set a shading sheet to increase the thickness of the lens, so it can reduce the thickness of the lens (as shown in the figure 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 advantageous 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: Optical Department

12, 12a, 12b, 12c, 12d: shading section

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: angle

FIG. 1 is an exploded perspective view of the lens structure of the present invention. 2 is a cross-sectional view of the lens structure of the present invention. FIG. 3 is a partially enlarged view of FIG. 2. FIG. 3A is a partially enlarged view of FIG. 3. 4 is a cross-sectional view of a lens with a light-shielding structure of the present invention. FIG. 5 is a partially enlarged view of FIG. 4. 6 is a partial cross-sectional view of a second embodiment of a lens having a light-shielding structure of the present invention. 7 is a partial cross-sectional view of a third embodiment of a lens having a light-shielding structure of the present invention. FIG. 8 is a cross-sectional view of a fourth embodiment of a lens having a light-shielding structure of the present invention. 9 is a partially enlarged view of FIG. 8. FIG. 10 is a schematic diagram of a fifth embodiment of a lens having a light-shielding structure of the present invention. 11 is a partial cross-sectional view of FIG. 12 is a cross-sectional view of a lens structure according to another embodiment of the invention. 13 is a cross-sectional view of a lens structure according to another embodiment of the invention.

10: Lens with shading structure

11: Optical Department

12: Shade

13: Positioning Department

20: lens mount

30: Gasket

Claims (10)

A lens with a shading structure includes a body, the body defines an axis, the body includes an optical part and a shading part, the optical part is located in the center of the body, the shading part is ring-shaped and surrounds the optical part Around, the shading portion includes a microstructure and a shading layer, the microstructure includes a plurality of concave portions formed on the body, the shading layer is coated on the microstructure to fill the concave portions; wherein, the microstructure The two ends in the radial direction respectively have a convex baffle, the concave portion of the microstructure is enclosed between the two baffles, and the light-shielding layer fills the space between the two baffles. The height is approximately 15 to 25 μm, the cross section of each stopper is generally triangular, and the angle of the outward tip thereof is approximately 40 to 135 degrees. 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 spaced apart. The lens with shading structure as described in claim 2, wherein the radial cross section of each ring groove is an inverted triangle. The lens with shading structure as described in claim 2, wherein the radial cross section of each ring groove is generally rectangular. The lens with shading structure as described in claim 2, wherein the radial cross section of each ring groove is trapezoidal. The lens with a light-shielding structure as described in claim 1, wherein the concave portions of the microstructure are evenly distributed and are respectively polygonal cone-shaped concave. The lens with a light-shielding structure as described in claim 1, wherein the concave portions of the microstructure are a plurality of long grooves, the long grooves are arranged in a radial manner and respectively 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 body further includes a positioning portion, the positioning portion is located outside the light-shielding portion. A lens structure includes a lens holder and a plurality of lenses. At least one of the lenses is a lens having 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 body further includes a positioning portion, the positioning portion is located outside the shading portion for contacting and positioning with the other lens and the lens holder.

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