TWM583550U - Lens with light shading structure and lens structure - Google Patents

Abstract

A lens with a light-shielding structure includes a body defining an axial direction. 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 annular and surrounds the optical portion. Around, the light shielding portion includes a microstructure and a light shielding layer. The microstructure includes a plurality of concave portions formed on the body. The light shielding layer is coated on the microstructure to fill the concave portions.

Description

Lens and lens structure with light-shielding structure

This creation is about a lens with a light-shielding 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. The imaging is achieved by different focusing and astigmatism effects. Among them, in order to avoid stray light from interfering with the imaging, the imaging effect is achieved. Poor, often use a light-shielding sheet to sandwich between the non-optical parts of each lens, as disclosed in the patent TWI628484, to absorb stray light, improve the light-concentrating effect, and improve imaging.

However, a lens structure can have as few as three to four lenses and as many as more than ten lenses. If a light shield is sandwiched between each lens, it will greatly increase the overall thickness of the lens, which is not good for electronics. If the device is thin and light, if the lens is protruded, it will be 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 this creation is to provide a lens with a light-shielding structure and a lens structure, which can achieve a good light-shielding effect without reducing the thickness of the lens without a light-shielding sheet.

In order to achieve the above object, this creation provides a lens with a light-shielding structure, which includes a body defining an axial direction. 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 includes a microstructure and a light-shielding layer. The micro-structure includes a plurality of concave portions formed on the body. The light-shielding layer is coated on the microstructure and fills the concave portions. full.

In order to achieve the above object, the present invention further 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 light shielding structure, and the lenses are coaxially disposed in the lens holder.

The following is an example to illustrate the possible implementation of this creation, but it is not intended to limit the scope of protection of this creation.

Please refer to FIGS. 1 to 13. This creation provides a lens with a light-shielding structure, which includes a body 10, 10a, 10b, 10c, the body 10, 10a, 10b, 10c defines an axial direction, and the body 10, 10a, 10b 10c includes an optical part 11 and a light shielding part 12, 12a, 12b, 12c, 12d. The optical part 11 is located at the center of the body 10, 10a, 10b, 10c. The light shielding part 12, 12a, 12b, 12c, 12d The light-shielding portion 12, 12a, 12b, 12c, 12d includes a microstructure 121, 121a, 121b, 121c, 121d and a light-shielding layer 122, 122a, 122b, 122c, 122d. The microstructures 121, 121a, 121b, 121c, and 121d include a plurality of recesses formed on the body 10, 10a, 10b, and 10c. The light shielding layers 122, 122a, 122b, 122c, and 122d are coated on the microstructures 121 and 121a. , 121b, 121c, 121d and fill the recesses (for example, processing with precision coating equipment with black ink or UV glue and drying and curing with UV curing machine or oven); preferably, the body 10, 10a, 10b, and 10c further include a positioning portion 13 located on the light shielding portion 12, 12a, 1 2b, 12c, 12d for contact positioning with other lenses and the lens holder 20; In addition, the light shielding portions 12, 12a, 12b, 12c, 12d may be provided only in the body 10, 10a, 10b, 10c One side can also be provided on opposite sides of the body 10, 10a, 10b, 10c.

This creation 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 disposed in the lens holder 20. In this embodiment, In these lenses, a plurality of the above-mentioned lenses having a light-shielding structure are included, and the lenses generally do not have a light-shielding structure. To prevent the optical parts of the lenses from interfering with each other, a spacer 30 is provided between adjacent lenses.

With regard to the microstructures 121, 121a, 121b, 121c, and 121d, the recesses may be carved by lasers with a plurality of annular grooves extending around the axis and spaced apart. The radial cross section of each of the annular grooves is an inverted triangle. , Rectangular, trapezoidal, semi-circular, or other shapes, as shown in FIGS. 4 to 7; in other possible embodiments, the recesses can be evenly distributed and respectively form polygonal pyramidal recesses, as shown in FIGS. 8 and 9. The one shown is a plurality of long grooves, which are arranged in a radial pattern and extend along the radial direction of the body, as shown in FIG. 10 and FIG. 11. In addition, the recesses can also be formed by the surface of the body. It is formed by roughening it by processing such as sandblasting.

In particular, as shown in FIG. 3A, the two ends of the microstructure in the radial direction may each have a protruding stopper 1211, and the two stoppers 1211 surround the concave portion 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, each of the blocking portions 1211 has a triangular cross-section with one of the tips facing outward, and the direction of each blocking portion. The included angle θ of the outer tip is approximately 40 to 135 degrees.

With the above structure, the lens provided by this creation with a light-shielding structure can achieve the light-shielding effect of reducing stray light, ensuring that the light path is concentrated and avoiding interference. As shown in Figure 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.) It is extremely advantageous to install in thin electronic devices. In addition, it can replace the lens Function of the aperture plate (aperture plate).

0, 10a, 10b, 10c
11‧‧‧ Optics Department
12, 12a, 12b, 12c, 12d
121, 121 a, 121b, 121c, 121d ‧‧‧ microstructure
1211‧‧‧ Block
122, 122a, 122b, 122c, 122d
13‧‧‧Positioning Department
20, 20'‧‧‧ lens mount
30‧‧‧ Gasket
H‧‧‧height θ‧‧‧angle

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

Claims (11)

A lens with a light-shielding structure includes a body defining an axial direction. 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 annular and surrounds the optical portion. Around, the light shielding portion includes a microstructure and a light shielding layer. The microstructure includes a plurality of concave portions formed on the body. The light shielding layer is coated on the microstructure to fill the concave portions. 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 a light-shielding structure as described in claim 2, wherein the radial cross-section of each ring groove is an inverted triangle. The lens with a light-shielding structure according to claim 2, wherein a radial cross section of each of the ring grooves is substantially rectangular. The lens with a light-shielding structure according to claim 2, wherein a radial cross section of each of the ring grooves is trapezoidal. The lens with a light-shielding structure according to claim 1, wherein the concave portions of the microstructure are evenly distributed and are respectively in the shape of a polygonal pyramid. The lens with a light-shielding structure according to claim 1, wherein the concave portions 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, respectively. The lens with a light-shielding structure according to any one of claims 1 to 7, wherein the body further includes a positioning portion, and the positioning portion is located outside the light-shielding portion. The lens with a light-shielding structure according to any one of claims 1 to 7, wherein each of the two ends of the microstructure in the radial direction has a convex stopper, and the two stoppers surround the concave of the microstructure. And the light-shielding layer fills the space between the two barriers. The height of the light-shielding layer is approximately 15 to 25 μm. The cross-section of each of the barriers is triangular and the angle of its outward tip is approximately 40 to 135 degrees. A lens structure includes a lens holder and a plurality of lenses. At least one of the lenses is a lens with a light-shielding structure according to any one of claims 1 to 7. The lenses are coaxially disposed in the lens holder. The lens structure according to claim 10, wherein the body further includes a positioning portion, which is located outside the light shielding portion for contacting and positioning with other lenses and the lens holder.