TWI448765B - Lens and a lens module using same - Google Patents

Description

Lens and lens module using the same

The invention relates to a lens and a lens module using the same.

Currently, lenses generally include two spherical or aspherical optical surfaces, each having its own optical axis. In order to improve the imaging effect of the lens, it is usually necessary to repeatedly adjust the molding die of the lens so that the optical axis of the two optical faces of the lens formed by the molding die is adjusted to minimize the eccentricity of the lens. The adjustment process of the molding die takes a long time, and it is necessary to develop and produce a plurality of sets of molding dies. The development cost of the lens is high, resulting in a high production cost of the lens and the lens module using the lens.

In view of the above, it is necessary to provide a lens which can reduce the production cost and a lens module using the same.

A lens comprising two sub-lenses, each sub-lens comprising an optical curved surface having an optical axis and a connecting plane facing away from the optical curved surface, the two sub-lenses being adhered through the two connecting planes, and the two The optical axes coincide.

A lens module includes a lens barrel and a plurality of the lenses disposed in the lens barrel.

Compared with the prior art, in the process of producing the lens, the light of the two optical curved surfaces can be adjusted by adjusting the relative positions of the two connecting planes that the two sub-lenses are attached to each other. The shafts are overlapped without repeatedly adjusting the molding die during the development of the molding die, which can reduce the production cost of the lens, and further reduce the production cost of the lens module using the lens.

10,20‧‧‧ lenses

100,300‧‧‧ first sub-lens

200,400‧‧‧second sub-lens

101,201‧‧‧ first side

103, 205‧‧‧ second side

107‧‧‧ bumps

102‧‧‧First optical surface

202‧‧‧second optical surface

104‧‧‧First connection plane

204‧‧‧Second connection plane

105‧‧‧First groove

203‧‧‧second groove

206‧‧‧ side

302‧‧‧First optical axis

304‧‧‧second optical axis

220‧‧‧ embedded department

218‧‧‧ side

30‧‧‧Lens module

40‧‧‧Mirror tube

1 is a schematic cross-sectional view of a lens according to a preferred embodiment of the present invention.

2 is a schematic cross-sectional view of the lens of FIG. 1.

3 is a cross-sectional view of a lens module in accordance with a preferred embodiment of the present invention.

The following preferred embodiments will be described in detail below with reference to the accompanying drawings.

Referring to FIG. 1 , a lens 10 of a preferred embodiment of the present invention includes a first sub-lens 100 and a second sub-lens 200 .

Referring to FIG. 2, the first sub-lens 100 includes a first optical surface 102 having a first optical axis 302 and a first connection plane 104 opposite to each other. Specifically, the first sub-lens 100 is a circular lens including a first side 101 and a second side 103 that are opposite each other. The central portion of the first side 101 has a spherical projection 107, and the outer surface of the spherical projection 107 serves as a first optical surface 102 of the first sub-lens 100. The first optical face 102 has a first optical axis 302. The central portion of the second side surface 103 defines a first recess 105 having a trapezoidal cross section. The first groove 105 includes a bottom surface (not shown) at a central portion of the first side surface 101, which is the first connection plane 104 of the first sub-lens 100. The first optical axis 302 is perpendicular to the first connection plane 104.

The second sub-lens 200 includes a second one having a second optical axis 304 opposite to each other The optical surface 202 and a second connection plane 204. Specifically, the second sub-lens 200 is a circular lens including a first side 201 and a second side 205 that are opposite to each other. A central portion of the first side surface 201 defines a second recess 203. The bottom surface of the second recess 203 serves as the second optical surface 202 of the second sub-lens 200 and the second optical surface 202 is aspherical. The second sub-lens 200 is located at one end of the second side surface 205 to form an embedding portion 220. The embedding portion 220 and the first recess 105 cooperate with each other and the second side surface 205 (ie, the top surface of the embedding portion 220) includes the second connecting plane 204. The second connection plane 204 is planar and has an area equal to the area of the first connection plane 104 of the first sub-lens 100.

When assembled, the first sub-lens 100 is fixed on a lens barrel (not shown), and then the two sides 206 of the second connection plane 204 of the second sub-lens 200 are coated with ultraviolet curing adhesive (UV glue). The second connection plane 204 of the second sub-lens 200 is attached to the first connection plane 104 of the first sub-lens 100. Since the first recess 105 has a trapezoidal cross section and the second connecting plane 204 of the second sub-lens 200 is planar and has an area equal to the area of the first connecting plane 104 of the first sub-lens 100, the second sub-lens 200 is second. The connection plane 204 is easily positioned on the first connection plane 104 of the first sub-lens 100 and an excessive amount of eccentricity between the first sub-lens 100 and the second sub-lens 200 can be avoided. At this time, an ultraviolet (UV) light source (not shown) is turned on to irradiate the UV glue, so that the UV glue is gradually solidified, and the first sub-lens 100 is adjusted by the UV glue during the irradiation process using an eccentric adjustment device (not shown). The angle between the connecting plane 104 and the second connecting plane 204 of the second sub-lens 200 is adjusted to adjust the eccentricity of the lens 10 to make the first optical axis 302 and the second optical axis 304 coincide. Since the first sub-lens 100 and the second sub-lens 200 are easily positioned relative to each other, and the eccentricity can be adjusted during the assembly process, the development and manufacture of the mold are avoided many times, the cost of the mold is greatly reduced, and the cost is further reduced. The production cost of the lens 10.

In this embodiment, the first groove 105 has a trapezoidal cross section, and the first groove 105 further includes two side faces 218 connected to the second connecting plane 204 (ie, the bottom surface), and the side surface 218 is in the second connecting plane 204. The orthographic projection is outside the second connection plane 204. It will be appreciated that the shape of the side 218 is not limited to this embodiment, as long as the orthographic projection of the side 218 at the second connecting plane 204 is outside the second connecting plane 204 is an embodiment of the present invention. Similarly, it can also be understood that the cross section of the first recess 105 can also be square, in which case the orthographic projection of the side surface at the second connecting plane 204 coincides with the edge of the second connecting plane 204.

It can be understood that the first groove 105 is opened to facilitate mutual positioning between the first sub-lens 100 and the second sub-lens 200, and the positioning mode of the present invention is not limited to the second.

It can be understood that the structural features of the first sub-lens 100 and the second sub-lens 200 are not limited to the above embodiments, as long as the first side 101, 201 has a spherical or aspherical surface, and the second side 103, 205 has a flat surface. The embodiment of the spirit. Meanwhile, the manner of fixing between the first sub-lens 100 and the second sub-lens 200 is not limited to the above embodiment.

It can be understood that in some special-purpose lenses, the first optical axis 302 or the second optical axis 304 may not be perpendicular to the first connection plane 104 or the second connection plane 204, as the case may be.

In other embodiments, at least one lens 10 can be utilized to form a lens module 30. For example, referring to FIG. 3 , in the present embodiment, the lens module 30 includes a lens barrel 40 and lenses 10 , 20 disposed in the lens barrel 40 . The lens 20 includes a first sub-lens 300 and a second sub-lens 400. The first sub-lens 300 and the second sub-lens 400 are similar to the structural features and combinations of the first sub-lens 100 and the second sub-lens 200, respectively. Those skilled in the art can know the first sub-lens 300 and the first embodiment from the above embodiments. The specific structural features and combinations of the two sub-lens 400 are not described again.

It should be understood by those skilled in the art that the foregoing embodiments are merely illustrative of the invention, and are not intended to limit the invention, as the scope of the spirit of the invention Changes and modifications are intended to fall within the scope of the invention.

10‧‧‧ lenses

100‧‧‧First sub-lens

200‧‧‧Second sub-lens

101,201‧‧‧ first side

103, 205‧‧‧ second side

107‧‧‧ bumps

102‧‧‧First optical surface

202‧‧‧second optical surface

104‧‧‧First connection plane

204‧‧‧Second connection plane

105‧‧‧First groove

203‧‧‧second groove

206‧‧‧ side

302‧‧‧First optical axis

304‧‧‧second optical axis

220‧‧‧ embedded department

218‧‧‧ side

Claims (9)

A lens comprising two sub-lenses, wherein each sub-lens comprises only one optical curved surface having an optical axis and a connecting plane facing the optical curved surface, the optical axis passing through the optical curved surface and the connecting plane The two sub-lenses are adhered through the two connection planes, and the two optical axes coincide. The lens of claim 1, wherein the optical curved surface is spherical or aspherical. The lens of claim 1, wherein the two sub-lenses are adhered by an ultraviolet curable adhesive. The lens of claim 1 wherein the optical axis of each sub-lens is perpendicular to the plane of attachment of the sub-lens. The lens of claim 1, wherein the two connecting planes have the same shape and area. The lens of claim 1, wherein one of the sub-lens faces has a groove formed on one side of the optical curved surface thereof, the groove includes a bottom surface, the bottom surface is a connection plane of the lens; The lens includes an insert that mates with the recess, the insert including a top surface that is the plane of attachment of the lens. The lens of claim 6, wherein the groove further comprises two sides connected to the bottom surface, and an orthographic projection of the side surface at the bottom surface coincides with an edge of the bottom surface. The lens of claim 6, wherein the groove further comprises two sides connected to the bottom surface, the side surface of the side surface being projected outside the bottom surface. A lens module comprising a lens barrel and at least one lens disposed in the lens barrel according to any one of claims 1 to 8.