TWI660232B - Lens module - Google Patents

Abstract

A lens module includes a lens unit and a light turning unit. The lens unit includes a lens barrel and at least one lens, the lens constitutes an optical axis, and the lens barrel includes a first end portion, the first end portion being adjacent to the light turning unit. The light turning unit includes a body, and the body has a reflecting surface. Wherein, after a light beam changes its path through the reflecting surface, it passes through the lens unit in the direction of the optical axis. The distance from the intersection of the reflective surface and the optical axis to the lens is a first distance, and the distance from the intersection of the reflective surface and the optical axis to the first end is a second distance. The lens has a first angle with the optical axis, and the lens module satisfies the following conditions: 0.8 <tan ( α ) × <1; wherein α is the first angle, A ′ is the first distance, and B ′ is the second distance.

Description

Lens Module (3)

The present invention relates to a lens module, and particularly to a periscope lens module.

When a conventional lens module is operated, the space between the lens unit and other optical components is often too small due to the structural relationship, which causes the movable range of the lens unit or other optical components to be limited, which affects the optical Anti-shake (Optical Image Stabilization) effect.

In view of this, the present invention proposes a lens module, which includes a lens unit and a light turning unit, the lens unit includes a lens barrel and a lens, and the shape of the lens barrel is changed by changing the shape of the lens barrel. The lens protrudes from the lens barrel to increase the space between the lens unit and the light turning unit, thereby expanding the movable range of the lens unit or the light turning unit.

One embodiment of the lens module of the present invention includes a lens unit and a light turning unit. The lens unit includes a lens barrel and at least one lens, the lens forms an optical axis, and the lens barrel includes a first end portion and a second end portion, and the first end portion is adjacent to the light turning unit. The light turning unit includes a body, and the body has a reflecting surface. Wherein, after a light beam changes its path from the first direction through the reflecting surface, it passes through the lens unit in the direction of the optical axis. The distance from the intersection of the reflective surface and the optical axis to the lens on the optical axis is a first distance, and the distance from the intersection of the reflective surface and the optical axis to the first end on the optical axis is A second distance, the normal of the reflecting surface and the optical axis are at a first angle, and the lens module satisfies the following conditions: 0.8 <tan ( α ) × <1; wherein α is the first angle, A ′ is the first distance, and B ′ is the second distance.

Another embodiment of the lens module of the present invention includes a lens unit and a light turning unit. The lens unit includes a lens barrel and at least one lens, the lens forms an optical axis, and the lens barrel includes a first end portion and a second end portion, and the first end portion is adjacent to the light turning unit. The light turning unit includes a body, and the body has a reflecting surface. Wherein, after a light beam changes its path from the first direction through the reflecting surface, it passes through the lens unit in the direction of the optical axis. Wherein, the second end portion is the farthest end of the lens barrel from the optical turning unit and opposite to the other end portion of the first end portion, the intersection of the reflective surface and the optical axis to the end of the second end portion on the optical axis The distance above is a third distance, the lens barrel has a height along the direction perpendicular to the optical axis, the normal of the reflecting surface and the optical axis are at a first angle, and the lens module also meets the following conditions : 0.7 < × H <1.6; where H is the height of the lens barrel and C ′ is the third distance.

Yet another embodiment of the lens module of the present invention includes a lens unit and a light turning unit. The lens unit includes a lens barrel and at least one lens, the lens forms an optical axis, and the lens barrel includes a first end portion and a second end portion, and the first end portion is adjacent to the light turning unit. The light turning unit includes a body, and the body has a reflecting surface. Wherein, after a light beam changes its path from the first direction through the reflecting surface, it passes through the lens unit in the direction of the optical axis. The distance from the intersection of the reflective surface and the optical axis to the lens on the optical axis is a first distance, and the distance from the intersection of the reflective surface and the optical axis to the first end on the optical axis is A second distance, the normal of the reflecting surface is at a first angle with the optical axis, and the second end is the end of the lens barrel farthest from the light turning unit and opposite to the other end of the first end, the reflection The distance from the intersection of the surface and the optical axis to the end of the second end on the optical axis is a third distance. The lens barrel has a height along a direction perpendicular to the optical axis, and the lens module satisfies The following conditions: 0.8 <tan ( α ) × A '/ B '<1; 0.7 < × H <1.6; where α is the first angle, A ′ is the first distance, B ′ is the second distance, H is the height of the lens barrel, and C ′ is the third distance.

In another embodiment, the first angle α ranges from 42 to 48 degrees.

In another embodiment, the lens barrel module further satisfies the following conditions: 0.8 < A '/ B '<1; wherein A 'is the first distance and B' is the second distance.

In another embodiment, the first end portion is integrally formed with the second end portion or is separable.

In another embodiment, the body further includes a first surface facing the lens unit, and a distance from the first surface to the lens on the optical axis is a first length, and the first surface is to the first end. The distance on the optical axis is a second length, and the second end is the farthest end of the lens barrel away from the light turning unit and opposite to the first end, the first surface to the second end The distance of the end of the part on the optical axis is a third length. The lens barrel has a height along a direction perpendicular to the optical axis. The body has a length along a direction parallel to the optical axis. The lens barrel has a length. The module meets the following conditions: 0.4 <tan ( α ) × A / B <0.8; 5 < H / G × C <11; where α is the first angle, A is the first length, and B is the second Length, C is the third length, H is the height of the lens barrel, and G is the length of the body.

In another embodiment, the body further includes a first surface facing the lens unit, and a distance from the first surface to the lens on the optical axis is a first length, and the first surface is to the first end. The distance on the optical axis is a second length, and the lens barrel module satisfies the following conditions: 0.4 <tan ( α ) × A / B <0.8; 0.6 < A / B <0.7; where α is the first At an angle, A is the first length and B is the second length.

In another embodiment, the light turning unit further includes a first lens, and the body further includes a first surface and a second surface. The first lens is disposed on the first surface and is used to focus the light beam. The first lens is integrally formed with the system or is separable.

In another embodiment, the light turning unit further includes a second lens disposed on the second surface and used to converge the light beam. The second lens is integrally formed with the system or is separable.

In order to have a better understanding of the above and other aspects of the present invention, the following specific examples are given below in conjunction with the accompanying drawings to make a detailed description as follows:

10‧‧‧ lens unit

12‧‧‧ lens

14‧‧‧ Mirror Tube

20, 20’‧‧‧‧Light turning unit

22‧‧‧ Ontology

24‧‧‧Mount

26‧‧‧Second lens

100, 100’‧‧‧ lens module

141‧‧‧first end

143‧‧‧second end

221‧‧‧ the first side

223‧‧‧Reflective surface

225‧‧‧Second Side

A, B, C, G, G’‧‧‧ length

D, E‧‧‧Width

F, F ’, H‧‧‧ height

L‧‧‧ Optical axis

I‧‧‧ the first line segment

J‧‧‧Second Line Segment

α ‧‧‧ first angle

β‧‧‧ second angle

FIG. 1 is a perspective view of a lens module according to a first embodiment of the present invention.

FIG. 2 is a plan view of the lens module in FIG. 1.

FIG. 3 is a cross-sectional view of the lens module in FIG. 2 taken along a plane perpendicular to the direction y and a plane passing through the optical axis.

FIG. 4 is a sectional view of the lens module in FIG. 1.

FIG. 5 is a sectional view of a lens module according to a third embodiment of the present invention.

Referring to FIG. 1, a lens module 100 according to a first embodiment of the present invention includes a lens unit 10 and a light turning unit 20. Among them, a light beam (not shown) emitted by an object (not shown) enters the light turning unit 20 and is changed in travel direction to pass through the lens unit 10 and can be imaged on a photosensitive element (not shown). The following details the assembly of these components:

As shown in FIG. 1, the lens unit 10 includes at least one lens 12 and a lens barrel 14. The lens barrel 14 has a first end portion 141 and a second end portion 143. The first end portion 141 is closest to the lens barrel 14. It faces one end of the light turning unit 20 and contacts the lens 12 closest to the light turning unit 20. The second end 143 is the other end of the lens barrel 14 that is farthest from the light turning unit 20 and opposite to the first end 141. The first end portion 141 and the second end portion 143 are integrally formed. The lens 12 is carried by the lens barrel 14 and forms an optical axis L. The optical axis L extends and passes through the optical turning unit 20. The light turning unit 20 includes a main body 22 and two mounting bases 24, wherein the main body 22 is a stack and is disposed on the mounting bases 24. It can be understood that the first end portion 141 and the second end portion 143 may also be two separate components, each carrying at least one lens, and then connected by various possible assembly methods.

Please refer to FIGS. 2, 3, 4, and 5 at the same time. The body 22 has a first surface 221, a reflective surface 223, and a second surface 225. The first surface 221 faces the lens unit 10, as shown in FIG. The distance from the first surface 221 of the body 22 to the lens 12 along a direction parallel to the optical axis L is a first length A, and from the first surface 221 of the body 22 to the lens barrel 14 along a direction parallel to the optical axis L. The distance of the first end portion 141 is a second length B, and the distance from the first surface 221 of the body 22 in a direction parallel to the optical axis L to the end of the second end portion 143 of the lens barrel 14 is a third length C, the distance from the intersection of the reflective surface 223 and the optical axis L of the body 22 to the lens 12 along a direction parallel to the optical axis L (that is, the distance from the intersection of the reflective surface 223 and the optical axis L to the lens 12 on the optical axis L ) Is a first distance A ′ (not shown), the distance from the intersection of the reflecting surface 223 of the body 22 and the optical axis L to the first end portion 141 of the lens barrel 14 in a direction parallel to the optical axis L (ie, the reflection The distance from the intersection of the surface 223 and the optical axis L to the first end 141 of the lens barrel 14 on the optical axis L) is a second distance B ′ (not shown), from the reflecting surface 223 of the body 22 and the optical axis L The distance from the intersection point to the end of the second end portion 143 of the lens barrel 14 in a direction parallel to the optical axis L (that is, the intersection of the reflection surface 223 and the optical axis L to the end of the second end portion 143 of the lens barrel 14 is at the light The distance on the axis L) is a third distance C ′ (not shown), and the body 22 has a length G along a direction parallel to the optical axis L. A direction z is perpendicular to the optical axis L, the body 22 has a height F along the direction z, and the lens barrel 14 has a height H along the direction z. As shown in FIG. 2, in addition, a direction y is perpendicular to the optical axis L and a direction z. The first end portion 141 has a first width E along the direction y, and the second end portion 143 follows the direction. y has a second width D.

Note that the first width E is greater than the second width D, the third length C is greater than the second length B, and the second length B is greater than the first length A. In other words, the lens 12 is closest to the body 22, and if the lens unit 10 is viewed from the side, top, or bottom, it can be found that the lens 12 protrudes out of the lens barrel 14. If so, the lens unit 10 and the light turning unit 20 will be added Actionable space between.

In the first embodiment, the first length A is 0.55 to 0.93 mm (mm), the second length B is 0.83 to 1.38 mm (mm), and the third length C is 7.18 to 7.19 mm (mm). A distance A 'is 3.15 to 3.53 mm (mm), a second distance B' is 3.43 to 3.98 mm (mm), and a third distance C 'is 9.78 to 9.79 mm (mm). The first width E is 5.6 to 7.6 mm (mm), the second width D of the second end portion 143 is 4.54 to 4.7 mm (mm), and the height H of the lens barrel 14 is 4.0 to 5.2 mm (mm). The length G of the body 22 is 5.2 mm (mm), and the height F of the body 22 is 4.9 mm (mm). In addition, the ratio of the height H of the lens barrel 14 to the length G of the main body 22 and then the calculated value (H / G) * C of the third length C ranges from 5.523 to 7.19 mm (mm).

When the lens module 100 is operated, after a light beam (not shown) emitted by an object (not shown) enters the light turning unit 20, the light turning unit 20 can be rotated around a first axis (not shown) parallel to the direction y (Illustrated) Rotate and change the traveling direction of the light beam, so that the light beam enters the lens unit 10. It can be understood that when the light turning unit 20 is rotated around the first axis, the distance between the lens unit 10 and the light turning unit 20 will change accordingly. The lens unit 10 can be moved relative to the light turning unit 20 along a direction parallel to the optical axis L, so as to achieve the function of optical image stabilization. It is worth noting that as the operable space between the lens unit 10 and the light turning unit 20 is increased, the movable range of the lens unit 10 or the light turning unit 20 is also relatively enlarged, thereby further strengthening the optical anti-shake effect.

Referring to FIG. 4, a first line segment I is perpendicular to a reflecting surface 223 of the body 22. In other words, the first line segment I is a normal line of the reflecting surface 223 and is at a first angle α with the optical axis L. When the light turning unit 20 is rotated around the first axis, the first line segment I is also rotated relative to the optical axis L, thereby changing the magnitude of the first angle α. Specifically, the first angle α is 42 to 48 degrees, the ratio A / B of the first length A to the second length B ranges from 0.662 to 0.674, and the ratio A 'of the first distance A' to the second distance B ' / B 'ranges from 0.886 to 0.918. Among them, a first value V ₁ and a second value V ₁ ′ can be expressed by the following equations (1) and (2): V ₁ = tan ( α ) × A / B … (1)

V ₁ '= tan ( α ) × A ' / B '... (2)

After substituting the values of the first angle α, the first length A, and the second length B into equation (1), it can be known that the range of the first value V ₁ is 0.597 to 0.748. Substituting the first length A and the second length B of the equation (1) with the first distance A ′ and the second distance B ′, respectively, into the equation (2), and the first angle α, the first distance A ′, and After the value of the second distance B ′ is substituted, it can be known that the range of the second value V ₁ ′ is 0.826 to 0.985.

In addition, a second line segment J is a line segment connecting the longest distance between the intersection of the reflective surface 223 and the optical axis L and the end of the second end portion 143, and is at a second angle β with the optical axis L. Specifically, the second angle β is 12.5 to 37.5 degrees. Among them, a third value V ₂ can be expressed by the following equation (3): V ₂ = tan ( β ) × H ... (3)

Among them, the optical axis L, the second line segment J, and the second angle β form a right-angled triangle, and tan ( β ) in equation (3) is a ratio of the length of the opposite side to the length of the adjacent side of the second angle β. Specifically, the length of the opposite side is half of the height H, and the length of the adjacent side is the third distance C ′, which is the distance from the intersection of the reflective surface 223 and the optical axis L to the first surface 221 plus the third length C. It should be noted that the distance from the intersection of the reflection surface 223 and the optical axis L to the first surface 221 is exactly half the length G, that is, the above equation (3) can be expressed in the following manner:

Wherein, after substituting the value of the third distance C ′ and the height H of the lens barrel 14 into equation (3), it can be known that the range of the third value V ₂ is 0.817 to 1.382 mm (mm). It is worth noting that the larger the third value V _{2 is} , the more favorable it is for imaging, and a wider viewing angle and better visual effects can be obtained.

In the second embodiment, the length G of the body 22 is 4.9 mm (mm), and the height F of the body 22 is 4.9 mm (mm), and the first distance A ′ is 3 to 3.38 mm (mm). The second distance B 'is 3.28 to 3.83 mm (mm), the third distance C' is 9.63 to 9.64 mm (mm), and the range of the ratio A '/ B' between the first distance A 'and the second distance B' is 0.882 ~ 0.914. The ratio of the height H of the lens barrel 14 to the length G of the body 22 is multiplied by the calculated value of the third length C (H / G) * C. The range is 5.861 ~ 7.630 mm (mm). Similarly, after calculation of the above equations (2) and (3), it can be known that the range of the second value V ₁ ′ is 0.823 to 0.980, and the range of the third value V ₂ is 0.830 to 1.404 mm (mm). The settings and operations of the other components are similar to those of the foregoing embodiment, so they are not repeated here.

Please refer to FIG. 5. In the third embodiment, the light turning unit 20 ′ further includes a second lens 26. The second lens 26 is disposed on the second surface 225 of the body 22 and is used for The light beam to be entered into the body 22 is converged. Wherein, the light beam enters the light turning unit 20 ′, enters the body 22 through the second surface 225, is reflected by the reflection surface 223, and leaves the body 22 through the first surface 221 in a direction parallel to the optical axis L to pass through the lens unit 10. Specifically, the second lens 26 and the main body 22 are integrally formed, and the length G ′ and the height F ′ of the main body 22 are both 3.58 mm (mm), and the first distance A ′ is 2.34 to 2.72 mm (mm). The range of the second distance B 'is 2.62 to 3.17 mm (mm), the third distance C' is 8.97 to 8.98 mm (mm), and the range of the ratio A '/ B' between the first distance A 'and the second distance B' It is 0.858 ~ 0.893, and the ratio of the height H of the lens barrel 14 to the length G 'of the body 22 is multiplied by the calculated value of the third length C (H / G') * C range is 8.022 ~ 10.443 mm (mm). Similarly, after calculation of the above equations (2) and (3), it can be known that the range of the second value V ₁ ′ is 0.804 to 0.953, and the range of the third value V ₂ is 0.891 to 1.507 mm (mm). The settings and operations of the other components are similar to those of the foregoing embodiment, so they are not repeated here.

In the fourth embodiment, the difference from the third embodiment is that the length G ′ and height F ′ of the body 22 are both 3.5 mm (mm), and the first distance A ′ is 2.3 to 2.68 mm (mm). The second distance B 'is 2.58 to 3.13 mm (mm), the third distance C' is 8.93 to 8.94 mm (mm), and the range of the ratio A '/ B' between the first distance A 'and the second distance B' is 0.856 ~ 0.891, the ratio of the height H of the lens barrel 14 to the length G 'of the body 22 is multiplied by the calculated value of the third length C (H / G') * C range is 8.205 ~ 10.682 mm (mm). Similarly, after calculation of the above equations (2) and (3), it can be known that the range of the second value V ₁ ′ is 0.802 to 0.951, and the range of the third value V ₂ is 0.895 to 1.514 mm (mm). The settings and operations of the other components are similar to those of the foregoing embodiment, so they are not repeated here.

The second lens 26 of the foregoing third and fourth embodiments is provided on the second surface 225 of the body 22 and is integrally formed, but is not intended to limit the present invention. The second lens 26 and the body 22 It can also be two separate parts and connected by various possible assembly methods (such as gluing). In addition, according to requirements, the second lens 26 may be disposed on the first surface 221 of the main body 22 and used to converge the light beam leaving the main body 22. Alternatively, a first lens (not shown) and a second lens 26 may be disposed on the first surface 221 and the second surface 225 of the body 22 at the same time. The first lens and the second lens 26 may be simultaneously with the body. Two parts that are integrally formed or separated, or one is integrally formed and the other is two separate parts.

The main body 22 of the foregoing embodiment is described by using osmium, but it is only an implementation description and is not intended to limit the main body 22. In another embodiment, the main body 22 may be a reflector, a refractive mirror, or a polarizer.

The lens module 100, 100 of the present invention improves the structure of the lens barrel 14 used to carry the lens 12, so as to increase the movable range of the lens unit 10 or the light turning unit 20, 20 'to enhance its optical anti-shake effect. As a result, the lens modules 100, 100 'can also achieve the effect of reducing the thickness without affecting the optical performance.

Claims (10)

A lens module includes: a lens unit, including a lens barrel and at least one lens, the lens forming an optical axis, and the lens barrel includes a first end and a second end, the first end phase Adjacent to the light turning unit; and a light turning unit, including a body with a reflecting surface; wherein, a light beam changes its path from the first direction through the reflecting surface, and then passes through the lens unit in the direction of the optical axis ; Where the distance from the intersection of the reflective surface and the optical axis to the lens on the optical axis is a first distance, and the distance from the intersection of the reflective surface and the optical axis to the first end on the optical axis Is a second distance, the normal of the reflecting surface and the optical axis form a first angle, and the lens module meets the following conditions: 0.8<tan( α )×

<1; where, α is the first angle, A'is the first distance, and B'is the second distance. A lens module includes: a lens unit, including a lens barrel and at least one lens, the lens forms an optical axis, and the lens barrel includes a first end and a second end, the first end phase Adjacent to the light turning unit; and a light turning unit, including a body with a reflecting surface; wherein, a light beam changes its path from the first direction through the reflecting surface, and then passes through the lens unit in the direction of the optical axis ; Wherein the second end is the other end of the lens barrel farthest from the light turning unit and opposite to the first end, the intersection of the reflecting surface and the optical axis to the end of the second end is in the light The distance on the axis is a third distance, the lens barrel has a height along the direction perpendicular to the optical axis, the normal of the reflecting surface and the optical axis are at a first angle, and the lens module also satisfies the following Condition: 0.7<

×H<1.6; where H is the height of the lens barrel and C′ is the third distance. A lens module includes: a lens unit, including a lens barrel and at least one lens, the lens forms an optical axis, and the lens barrel includes a first end and a second end, the first end phase Adjacent to the light turning unit; and a light turning unit, including a body with a reflecting surface; wherein, a light beam changes its path from the first direction through the reflecting surface, and then passes through the lens unit in the direction of the optical axis ; Where the distance from the intersection of the reflective surface and the optical axis to the lens on the optical axis is a first distance, and the distance from the intersection of the reflective surface and the optical axis to the first end on the optical axis Is a second distance, the normal of the reflecting surface and the optical axis form a first angle, the second end is the other end of the lens barrel farthest from the light turning unit and opposite to the first end, the The distance from the intersection of the reflecting surface and the optical axis to the end of the second end on the optical axis is a third distance, the lens barrel has a height along the direction perpendicular to the optical axis, and the lens module Meet the following conditions: 0.8<tan( α )×

<1;0.7<

×H<1.6; where α is the first angle, A'is the first distance, B'is the second distance, H is the height of the lens barrel, and C'is the third distance. The lens module as described in any one of claims 1 to 3 of the patent application scope, wherein the first angle α ranges from 42 to 48 degrees. The lens module as described in item 4 of the patent application scope, wherein the lens barrel module further satisfies the following conditions: 0.8<

<1; where A'is the first distance and B'is the second distance. The lens module as described in item 4 of the patent application scope, wherein the first end and the second end are integrally formed or detachable. The lens module as claimed in any one of claims 1 to 3, wherein the body further includes a first surface facing the lens unit, the first surface to the lens on the optical axis The distance is a first length, the distance from the first surface to the first end on the optical axis is a second length, the second end is the lens barrel farthest from the light turning unit and opposite to the first The distance from the first surface to the end of the second end on the optical axis is a third length, the lens barrel has a height along the direction perpendicular to the optical axis, the The body has a length along the direction parallel to the optical axis, and the lens barrel module satisfies the following conditions: 0.4<tan( α )×

<0.8;5<

× C <11; where α is the first angle, A is the first length, B is the second length, C is the third length, H is the height of the lens barrel, and G is the length of the body. The lens module as claimed in any one of claims 1 to 3, wherein the body further includes a first surface facing the lens unit, the first surface to the lens on the optical axis The distance is a first length, the distance from the first surface to the first end on the optical axis is a second length, and the lens barrel module satisfies the following conditions: 0.4<tan( α )×

<0.8;0.6<

<0.7; where α is the first angle, A is the first length, and B is the second length. The lens module as claimed in any one of claims 1 to 3, wherein the light conversion unit further includes a first lens, and the body further includes a first surface and a second surface, the The first lens is disposed on the first surface and used to converge the light beam. The first lens is integrally formed with the system or detachable. The lens module as described in item 9 of the patent application scope, wherein the light turning unit further includes a second lens, the second lens is disposed on the second surface and used to converge the light beam, the second lens and the lens The system is integrated or separable.