TWI704407B - Hand-held electronic device and head-mounted electronic device - Google Patents

Abstract

A hand-held electronic device including an optical imaging module, a casing, and a display device is provided. An optical imaging module is adapted to receive a light beam. The optical imaging module including a lens set, a linear polarization element, a light splitting element, two reflective sets, and a photosensitive element are on an optical axis from an object side to an image side. The optical axis includes a first optical axis and a second optical axis that is not parallel to the first optical axis, wherein the two reflective sets, and the optical element are located on the second optical axis and the light splitting element is disposed between the two reflective sets. The light beam is reflected by one of the two reflective sets and passed through the beam splitting element, and the light beam is reflected by another one of the two reflective sets and reflected by the beam splitting element to the photosensitive element.

Description

Handheld electronic device and head-mounted electronic device

The present invention relates to an electronic device, and more particularly to a handheld electronic device and a head-mounted electronic device.

In recent years, the popularization of portable electronic products such as mobile phones and digital cameras has led to the rapid development of image module related technologies. This image module mainly includes optical imaging lenses, module holder units and sensors. Other components, and the trend toward thinner and lighter mobile phones and digital cameras has also increased the demand for miniaturization of image modules. With the technological advancement and size reduction of charge coupled device (CCD) and complementary metal oxide semiconductor (CMOS), the optical imaging lens mounted in the imaging module also needs to correspond accordingly Shorten the length. However, in order to avoid the degradation of photographic effects and quality, good optical performance must be taken into consideration when shortening the length of the optical imaging lens. The most important characteristics of optical imaging lenses are nothing more than imaging quality and volume.

However, the production technology of miniaturized lenses is significantly more difficult than traditional lenses. Therefore, how to make an optical imaging lens that meets the needs of consumer electronic products and continuously improve its imaging quality has long been an ardent pursuit of the industry, government, and academia. In addition, the short focal length of the wide-angle lens and fisheye lens makes it difficult to shorten the overall length. The dilemma of shortening the length of the lens or maintaining the image quality causes difficulties in the design of optical imaging lenses.

The invention provides an electronic device that can reduce the total length of the lens, so that a wide-angle lens, fisheye lens or telescope lens can be mounted in a mobile phone or a thin device.

The present invention provides a handheld electronic device, which includes an optical imaging module, a housing and a display device. The housing and the display device cover the optical imaging module, and a light-transmitting part is arranged on one side of the housing, and the optical imaging module is suitable for receiving a light beam transmitted through the light-transmitting part. The optical imaging module includes a lens group, a linear polarization element, a light splitting element, two reflection groups and a photosensitive element along an optical axis from an object side to an image side. The optical axis includes a first optical axis and a second optical axis that is not parallel to the first optical axis, wherein the lens group, linear polarization element, beam splitter element and photosensitive element are located on the first optical axis, two reflective groups and beam splitter element It is located on the second optical axis, and the light splitting element is arranged between the two reflection groups. The light beam is reflected by one of the two reflection groups and transmitted through the light splitting element, and the light beam is reflected by the other one of the two reflection groups and reflected by the light splitting element to the photosensitive element.

In an embodiment of the present invention, the aforementioned light splitting element is a polarization beam splitter.

In an embodiment of the present invention, each of the above-mentioned two reflection groups includes a quarter A wave plate and a reflective element.

In an embodiment of the present invention, at least one of the above-mentioned two reflection groups further includes at least one lens with diopter, located between the beam splitter element and the quarter wave plate.

In an embodiment of the present invention, the reflective element of at least one of the above-mentioned two reflective groups includes a lens with diopter and reflective coating, and the quarter wave plate is located between the beam splitter element and the reflective element.

In an embodiment of the present invention, the reflecting element of at least one of the above-mentioned two reflecting groups includes a curved mirror, and the quarter wave plate is located between the beam splitting element and the reflecting element.

In an embodiment of the present invention, the reflecting element of at least one of the above-mentioned two reflecting groups includes a plane mirror, and the quarter wave plate is located between the beam splitting element and the reflecting element.

In an embodiment of the present invention, the aforementioned linear polarization element includes a first linear polarization element and a second linear polarization element. The first linear polarization element is located between the lens group and the light splitting element, and the light splitting element is located between the first linear polarization element and the second linear polarization element.

In an embodiment of the present invention, the above-mentioned lens group, linear polarization element, beam splitting element and two reflection groups are formed as a wide-angle lens, fisheye lens or telescope lens.

The present invention also provides a head-mounted electronic device, which includes a plurality of light source detection modules, a housing, and a display device. The housing and the display device cover the light source detection module, and at least one side of the housing is provided with multiple light-transmitting parts. The light source detection module is suitable for To correspondingly receive a plurality of light beams passing through the light-transmitting member. The optical imaging module includes a lens group, a linear polarization element, a light splitting element, two reflection groups and a photosensitive element along an optical axis from an object side to an image side. The optical axis includes a first optical axis and a second optical axis that is not parallel to the first optical axis, wherein the lens group, linear polarization element, beam splitter element and photosensitive element are located on the first optical axis, two reflective groups and beam splitter element It is located on the second optical axis, and the light splitting element is arranged between the two reflection groups. The light beam is reflected by one of the two reflection groups and transmitted through the light splitting element, and the light beam is reflected by the other one of the two reflection groups and reflected by the light splitting element to the photosensitive element.

In an embodiment of the present invention, the above-mentioned light source detection module is disposed at opposite ends of the housing.

In an embodiment of the present invention, the aforementioned light source detection module is disposed on the housing in a manner surrounding the housing.

In an embodiment of the present invention, the above-mentioned light source detection module is disposed in the housing, and the light source detection module is respectively arranged in a manner of facing different directions and correspondingly receives light beams from different directions.

Based on the above, in the electronic device of the present invention, the optical axis of the optical imaging module or the light source detection module includes a first optical axis and a second optical axis that is not parallel to the first optical axis, and two reflective groups and a light splitter The component is located on the second optical axis. Therefore, the light beam can be transmitted on the second optical axis by the reflection of the two reflection groups after being reflected by the light splitting element. In this way, the optical imaging module or the light source detection module can change the light beam from transmitting along the first optical axis to transmitting along the second optical axis through the light splitting effect of the light splitting element, and the light beam is reduced by the action of the two reflection groups The volume and reduction of optical imaging module or light source detection module The total length of the optical imaging module or the light source detection module.

In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail in conjunction with the accompanying drawings.

10: Handheld electronic devices

20: Head-mounted electronic device

50: shell

60: display device

100, 100A, 100B, 100C: optical imaging module

110, 110A: lens group

112: The first lens

114: second lens

116: third lens

118: fourth lens

120: Linear polarization element

120_1: The first linear polarization element

120_2: second linear polarization element

130: Spectroscopic element

140, 140A, 140B, 140C: reflection group

142: quarter wave plate

144, 144A, 144B: reflective element

146: lens

150: photosensitive element

200: Light source detection module

A1: Object side

A2: Image side

B: Translucent parts

I: Optical axis

I1: first optical axis

I2: second optical axis

L: beam

R: reflective coating

FIG. 1 is a schematic diagram of a handheld electronic device according to an embodiment of the invention.

2 is a schematic diagram of an optical imaging module according to an embodiment of the invention.

FIG. 3 is a schematic diagram of an optical imaging module according to another embodiment of the invention.

4 is a schematic diagram of an optical imaging module according to another embodiment of the invention.

FIG. 5 is a schematic diagram of an optical imaging module according to another embodiment of the invention.

FIG. 6 is a schematic diagram of a head-mounted electronic device according to an embodiment of the invention.

FIG. 1 is a schematic diagram of a handheld electronic device according to an embodiment of the invention. Please refer to Figure 1. An embodiment of the present invention provides a handheld electronic device 10, which includes an optical imaging module 100, a housing 50, and a display device 60. The handheld electronic device 10 is, for example, a mobile phone, the housing 50 is, for example, the back shell of the mobile phone, and the display device 60 is, for example, a display screen of the mobile phone. The housing 50 and the display device 60 cover the optical imaging module 100, and a light-transmitting member B is provided on one side of the housing 50.

2 is a schematic diagram of an optical imaging module according to an embodiment of the invention. Please refer to Figure 2. An embodiment of the present invention provides an optical imaging module 100 that can be applied to a headset Among the portable electronic devices or portable electronic devices, such as head-mounted VR display devices, notebook computers, tablet computers or mobile phones, etc., the following description will be applied to the handheld electronic device 10 shown in FIG. 1 Take an example, but the present invention is not limited to this. The optical imaging module 100 is adapted to receive a light beam L transmitted through the light-transmitting member B on the housing 50. The light beam can be visible or invisible light. The light beam L can be provided externally, or provided by the above-mentioned electronic device after passing through Any object in the reflection, the present invention is not limited to this. In other words, the optical imaging module 100 can be composed of a lens module and an imaging component. In this embodiment, the lens module is a wide-angle lens, a fisheye lens or a telescope lens, but the invention is not limited to this.

In detail, in this embodiment, the optical imaging module 100 includes a lens group 110, a linear polarization element 120, a beam splitting element 130, and two reflection groups 140 along an optical axis I from an object side A1 to an image side A2. And a photosensitive element 150. In other words, the lens module of the optical imaging module 100 is composed of a lens group 110, a linear polarization element 120, a beam splitting element 130, and two reflection groups 140, and the imaging element of the optical imaging module 100 is composed of a photosensitive element 150. constitute. The total length of the optical imaging module 100 can be defined as the distance from the surface of the lens group 110 facing the object side A1 to the surface of the photosensitive element 150 facing the image side A2. In this embodiment, the optical path length of the optical imaging module 100 is between 1.1 and 10 times the total length of the optical imaging module 100.

In this embodiment, the optical axis I includes a first optical axis I1 and a second optical axis I2 that is not parallel to the first optical axis I1. The lens group 110, the linear polarization element 120, the light splitting element 130, and the photosensitive element 150 are located on the first optical axis I1, and the two reflection groups 140 and the light splitting element 130 are located on the second optical axis I2. In other words, the spectroscopic element 130 is the same The time is on the first optical axis I1 and the second optical axis I2, and the light beam L transmitted to the light splitting element 130 will change the direction of the light path.

The lens group 110 is arranged on the transmission path of the light beam L on the first optical axis I1. The lens group 110 includes, for example, a combination of one or more optical lenses with refractive power, such as various combinations of non-planar lenses such as biconcave lenses, biconvex lenses, meniscus lenses, convex-concave lenses, plano-convex lenses, and plano-concave lenses. In this embodiment, the lens group 110 includes a first lens 112 and a second lens 114, but the invention does not limit the type and type of the lens group 110.

The linear polarization element 120 is disposed on the transmission path of the light beam L on the first optical axis I1, and is located on the light-emitting side of the lens group 110. The linear polarization element 120 is, for example, a linear polarizer, which can generate a linear polarization state in a single direction of the light beam L passing through. In other words, the light beam L is formed into linearly polarized light after passing through the linear polarizing element 120. In some embodiments, the linear polarizing element 120 may be composed of two linear polarizers, which are respectively arranged in different positions, which will be described in other embodiments below. In this embodiment, the linear polarizing element 120 is a single linear polarizer. In this embodiment, the light beam L passes through the linear polarization element 120 and is formed into a light beam with linear polarization in the first direction.

The beam splitting element 130 is disposed on the transmission path of the light beam L on the first optical axis I1, and is located on the light exit side of the linear polarization element 120, that is, the linear polarization element 120 is located between the lens group 110 and the beam splitting element 130. The beam splitter 130 is, for example, a Polarizing Beam Splitter (PBS), which can pass the light beam L in one specific polarization direction and reflect the light beam L in the other specific polarization direction. In this embodiment, the beam splitting element 130 is adapted to pass the light beam L having the first linear polarization direction, And it is suitable for reflecting a light beam L having a second linear polarization direction, wherein the first linear polarization direction is different from the second linear polarization direction.

The two reflection groups 140 and 140A are arranged on the transmission path of the light beam L on the second optical axis I2, and the beam splitting element 130 is located between the two reflection groups 140 and 140A. One of the two reflection groups 140, 140A is adapted to transmit the reflected light beam L through the beam splitting element 130, and the other one of the two reflection groups 140, 140A is adapted to transmit the reflected light beam L to the beam splitting element 130 and is reflected by the beam splitting element 130 To the photosensitive element 150. In detail, in this embodiment, the reflection group 140 located at the top of FIG. 2 includes a quarter wave plate 142 and a reflection element 144. The reflecting element 144 is, for example, a reflecting mirror. The reflection group 140A located at the bottom of FIG. 2 is similar to the reflection group 140 at the top of FIG. 2. The difference is that the reflection group 140A located at the bottom of FIG. 2 further includes at least one lens 146 with refractive power, and the at least one lens 146 is located on the beam splitting element 130 Between the quarter wave plate 142 of the reflection group 140A. In this embodiment, the number of lenses 146 is, for example, one, but the invention is not limited to this.

The photosensitive element 150 is disposed on the transmission path of the light beam L on the first optical axis I1, and the beam splitting element 130 is located between the linear polarization element 120 and the photosensitive element 150. The photosensitive element 150 is adapted to receive the light beam L to generate image data. The photosensitive element 150 is, for example, a charge coupled device (CCD) or a complementary metal oxide semiconductor transistor (CMOS), and the present invention is not limited thereto.

When the light beam L enters the optical imaging module 100 along the first optical axis I1 from the outside, the light beam L passes through the lens group 110 and the linear polarizing element 120, and is passed through. The light beam L passing through the linear polarization element 120 has a linear polarization state in the first direction. The light beam L having the linear polarization state in the first direction is transmitted to the beam splitting element 130, and the beam L is reflected by the beam splitting element 130 and transmitted along the second optical axis I2 to the reflection group 140A located at the bottom of FIG. 2. Specifically, the light beam L is sequentially transmitted by the beam splitting element 130 through the lens 146 and the quarter-wave plate 142 to the reflective element 144, and is sequentially transmitted through the quarter-wave plate by the reflection of the reflective element 144. 142 and the lens 146 pass through the spectroscopic element 130. Therefore, the light beam L is transmitted from the light splitting element 130 to the reflecting element 144 and then transmitted back to the light splitting element 130 after being reflected, and is respectively transmitted through the quarter wave plate 142 and the lens 146 twice. In other words, the lens 146 in the reflection group 140A can pass the light beam L to produce two optical effects. In this way, disposing at least one lens 146 with diopter in the reflection group 140A can reduce the number of lenses used by the optical imaging module 100, thereby reducing the volume.

On the other hand, since the light beam L passes through the quarter wave plate 142 twice and is reflected by the reflective element 144, the light beam L reflected by the reflective element 144 through the quarter wave plate 142 will have a vertical first The direction of the second direction linear polarization state. Therefore, the light beam L having the linear polarization state in the second direction passes through the beam splitting element 130 and is transmitted to the reflection group 140 located at the upper side of FIG. 2. Similarly, in the reflection group 140 located at the top of FIG. 2, the light beam L is transmitted by the beam splitting element 130 through the quarter wave plate 142 to the reflection element 144, and is again transmitted through the quarter by the reflection of the reflection element 144 A wave plate 142 is transmitted to the light splitting element 130. Since the light beam L passes through the quarter wave plate 142 twice and is reflected by the reflective element 144, the light beam L reflected by the reflective element 144 through the quarter wave plate 142 has a Linear polarization state in the first direction. Therefore, the light beam L having the linear polarization state in the first direction is transmitted to the beam splitting element 130 to be reflected and transmitted to the photosensitive element 150.

In this way, the optical imaging module 100 can change the light beam L from being transmitted along the first optical axis I1 to being transmitted along the second optical axis I2 by the light splitting effect of the light splitting element 130, and by the two reflection groups 140, 140A The function reduces the volume of the optical imaging module 100 and shortens the total length of the optical imaging module 100. In other words, a wide-angle lens, fisheye lens or telescope lens is easier to carry in a thin mobile phone or other thin and light device.

FIG. 3 is a schematic diagram of an optical imaging module according to another embodiment of the invention. Please refer to Figure 3. The optical imaging module 100A of this embodiment is similar to the optical imaging module 100 of the embodiment in FIG. 2. The difference between the two is that, in this embodiment, the reflection element 144A of the reflection group 140B located at the bottom of FIG. 2 includes a lens with diopter and reflective coating R instead of the mirror in the embodiment of FIG. 2. In addition, the quarter wave plate 142 is arranged between the beam splitting element 130 and the reflecting element 144A. For example, in this embodiment, the reflective element 144A is, for example, a convex plano lens, and a reflective coating R is formed on the light exit side (plane).

Therefore, when the light beam L is reflected by the light splitting element 130 and is transmitted along the second optical axis I2 to the reflection group 140B located below FIG. 3, the light beam L is transmitted by the light splitting element 130 through the quarter wave plate 142 and then transmitted to the reflective element. 144A, and the reflection of the reflective element 144A is sequentially transmitted again through the quarter wave plate 142 and then passed through the beam splitting element 130. In other words, the light beam L is transmitted from the light splitting element 130 to the reflecting element 144A, and then transmitted back to the light splitting element 130 after being reflected, and passed through twice. The quarter wave plate 142 and the lens of the double reflection element 144A. In this way, the light exit side of the lens with diopter in the reflection group 140B is combined with the reflection coating R to serve as the reflection element 144A, which can reduce the number of lenses used by the optical imaging module 100A, and at the same time reduce the position on the second optical axis I2 The number of components is reduced, thereby reducing the volume and shortening the optical path length of the optical imaging module 100A. In other words, a wide-angle lens, fisheye lens or telescope lens is easier to carry in a thin mobile phone or other thin and light device.

4 is a schematic diagram of an optical imaging module according to another embodiment of the invention. Please refer to Figure 4. The optical imaging module 100B of this embodiment is similar to the optical imaging module 100 of the embodiment in FIG. 2. The difference between the two is that, in this embodiment, the linear polarization element 120 includes a first linear polarization element 120_1 and a second linear polarization element 120_2, that is, the linear polarization element 120 can be composed of two linear polarizers. Among them, the first linear polarization element 120_1 is disposed between the lens group 110 and the light splitting element 130, and the second linear polarization element 120_2 is disposed between the light splitting element 130 and the photosensitive element 150. Therefore, after the light beam L passes through the two reflection groups 140 and 140C, the stray light can be filtered through the second linear polarizing element 120_2 to further improve the good optical effect.

In addition, in this embodiment, the reflecting element 144B of the reflecting group 140C located at the bottom of FIG. 4 includes a curved mirror to replace the reflecting mirror in the embodiment of FIG. 2. In addition, the quarter wave plate 142 is arranged between the beam splitting element 130 and the reflecting element 144B. For example, in this embodiment, the reflective element 144B is, for example, a concave mirror.

Therefore, when the light beam L is reflected by the light splitting element 130 and is transmitted along the second optical axis I2 to the reflection group 140C located at the bottom of FIG. 4, the light beam L is transmitted by the light splitting element 130 through the quarter wave plate 142 to the reflective element. 144B, and by reflection The reflection of the element 144B sequentially passes through the quarter wave plate 142 and passes through the beam splitting element 130 again. In other words, the light beam L is transmitted from the beam splitting element 130 to the reflective element 144B, and then transmitted back to the beam splitting element 130 after being reflected, and passes through the quarter wave plate 142 twice and the lens of the reflective element 144B twice, respectively. In this way, the curved mirror with diopter is used as the reflective element 144B in the reflective group 140C, which can reduce the number of lenses used by the optical imaging module 100B, and at the same time reduce the number of elements located on the second optical axis I2, thereby reducing the volume And shorten the optical path length of the optical imaging module 100B. In other words, a wide-angle lens, fisheye lens or telescope lens is easier to carry in a thin mobile phone or other thin and light device.

FIG. 5 is a schematic diagram of an optical imaging module according to another embodiment of the invention. Please refer to Figure 5. The optical imaging module 100C of this embodiment is similar to the optical imaging module 100 of the embodiment in FIG. 2. The difference between the two is that in this embodiment, the lens group 110A further includes a third lens 116 and a fourth lens 118. In addition, in this embodiment, the two reflection groups 140 are substantially the same, and both include a quarter wave plate 142 and a reflection element 144, and the reflection element 144 is a flat mirror.

Therefore, when the light beam L is reflected by the light splitting element 130 and is transmitted along the second optical axis I2 to the reflection group 140 located at the bottom of FIG. 5, the light beam L is transmitted by the light splitting element 130 through the quarter wave plate 142 and then transmitted to the reflective element. 144, and the reflection of the reflective element 144 is sequentially transmitted again through the quarter wave plate 142 and then passed through the beam splitting element 130. In other words, the light beam L is transmitted from the light splitting element 130 to the reflecting element 144 and then transmitted back to the light splitting element 130 after being reflected, and passes through the quarter wave plate 142 twice. In this way, the volume of the optical imaging module 100C can be reduced and the light Path length. In other words, a wide-angle lens, fisheye lens or telescope lens is easier to carry in a thin mobile phone or other thin and light device.

FIG. 6 is a schematic diagram of a head-mounted electronic device according to an embodiment of the invention. Please refer to Figure 6. An embodiment of the present invention provides a head-mounted electronic device 20, which includes a plurality of optical detection modules 200, a housing 50, and a display device 60. The head-mounted electronic device 20 is, for example, a head-mounted VR display device, the housing 50 is, for example, a back shell configured with a display module in the head-mounted device, and the display device 60 is, for example, a display module in the head-mounted device. The housing 50 and the display device 60 cover a plurality of optical detection modules 200, and a plurality of light-transmitting members B are arranged on one side of the housing 50. The multiple light source detection modules 200 are adapted to correspondingly receive multiple light beams passing through the multiple light-transmitting parts B (see light beam L in FIG. 2). In this embodiment, the multiple light source detection modules 200 can use the optical imaging modules 100, 100A, 100B, and 100C shown in FIGS. 2 to 5 as required. The detailed steps and implementations of the light source detection module 200 receiving the light beam L to perform light source detection can obtain sufficient teachings, suggestions and implementation descriptions from common knowledge in the relevant technical field, and therefore will not be repeated.

In one embodiment, the position of the light source detection module 200 is, for example, located at opposite ends of the housing 50 of the head-mounted electronic device 20. In another embodiment, the installation position of the light source detection module 200 is arranged on the housing 50 in such a way as to surround the housing 50 of the light source detection module 200. In this embodiment, the light source detection modules 200 are respectively arranged to face different directions and correspondingly receive light beams L from different directions, as shown in FIG. 6. As a result, reducing the volume of the light source detection module 200 and shortening the total length of the light source detection module 200 will enable the head-mounted electronic device Setting 20 can have more possibilities for the light source to detect the direction, thereby improving good optical quality.

It should be supplemented that the multiple light beams received by the light source detection module 200 in the head-mounted electronic device 20 may be provided by at least one light-emitting device. The light-emitting device is, for example, arranged in an optical base station. The invention is not limited to this. Wherein, the light beam provided by the light-emitting device is, for example, infrared light, or can also be X-ray, visible blue light, ultraviolet light, or ambient light that has undergone a specific filtering process, and the present invention is not limited thereto. Therefore, the light source detection module 200 in the wearable electronic device 20 can receive the light beam provided by the light-emitting device and transmitted to the light source detection module 200 through the reflection of environmental objects.

In summary, in the electronic device of the present invention, the optical axis of the optical imaging module or the light source detection module includes a first optical axis and a second optical axis that is not parallel to the first optical axis, and the two reflection groups And the light splitting element is located on the second optical axis. Therefore, the light beam can be transmitted on the second optical axis by the reflection of the two reflection groups after being reflected by the light splitting element. In this way, the optical imaging module or the light source detection module can change the light beam from transmitting along the first optical axis to transmitting along the second optical axis through the light splitting effect of the light splitting element, and the light beam is reduced by the action of the two reflection groups The volume of the optical imaging module or the light source detection module and the reduction of the total length of the optical imaging module or the light source detection module.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Anyone with ordinary knowledge in the technical field can make some changes and modifications without departing from the spirit and scope of the present invention. The scope of protection of the present invention shall be determined by the scope of the attached patent application.

100: Optical imaging module

110: lens group

112: The first lens

114: second lens

120: Linear polarization element

130: Spectroscopic element

140, 140A: reflection group

142: Quarter Wave

144: reflective element

146: lens

150: photosensitive element

A1: Object side

A2: Image side

I: Optical axis

I1: first optical axis

I2: second optical axis

L: beam

Claims (12)

A hand-held electronic device includes an optical imaging module, a housing, and a display device. The housing and the display device cover the optical imaging module, and a light-transmitting member is arranged on one side of the housing. The imaging module is adapted to receive a light beam transmitted through the light-transmitting member. The optical imaging module includes a lens group, a linear polarization element, a light splitting element, two reflection groups, and an optical axis from an object side to an image side. A photosensitive element, the optical axis includes a first optical axis and a second optical axis not parallel to the first optical axis, wherein the lens group, the linear polarization element, the beam splitting element, and the photosensitive element are located in the first optical axis On an optical axis, the two reflection groups and the beam splitting element are located on the second optical axis, and the beam splitting element is disposed between the two reflection groups, and the light beam is reflected by one of the two reflection groups and passed through The light splitting element and the light beam are reflected by the other one of the two reflection groups and reflected by the light splitting element to the photosensitive element. Each of the two reflection groups includes a quarter wave plate and a reflection element. In the handheld electronic device described in item 1 of the scope of patent application, the light splitting element is a polarization beam splitter. According to the hand-held electronic device described in claim 1, wherein at least one of the two reflection groups further includes at least one lens with diopter, located between the beam splitting element and the quarter wave plate. The handheld electronic device according to claim 1, wherein the reflective element of at least one of the two reflective groups includes a lens with diopter and reflective coating, and the quarter wave plate is located in the beam splitter Between the element and the reflective element. The handheld electronic device according to claim 1, wherein the reflection element of at least one of the two reflection groups includes a curved mirror, and the quarter wave plate is located between the beam splitting element and the reflection element between. The handheld electronic device according to claim 1, wherein the reflective element of at least one of the two reflective groups includes a plane mirror, and the quarter wave plate is located between the beam splitting element and the reflective element between. The hand-held electronic device according to claim 1, wherein the linear polarization element includes a first linear polarization element and a second linear polarization element, and the first linear polarization element is located between the lens group and the beam splitting element. The light splitting element is located between the first linear polarization element and the second linear polarization element. The handheld electronic device according to the first item of the patent application, wherein the lens group, the linear polarization element, the light splitting element and the two reflection groups are formed as a wide-angle lens, a fisheye lens or a telescope lens. A head-mounted electronic device includes a plurality of light source detection modules, a housing, and a display device. The housing and the display device cover the light source detection modules, and at least one side of the housing is provided with A plurality of light-transmitting parts, the light source detection modules are adapted to correspondingly receive a plurality of light beams passing through the light-transmitting parts, each of the light source detection modules includes from an object side to an image side along an optical axis A lens group, a linear polarization element, a beam splitting element, two reflection groups, and a photosensitive element. The optical axis includes a first optical axis and a second optical axis that is not parallel to the first optical axis, wherein the lens group, The linear polarization element, the light splitting element and the photosensitive element are located on the first optical axis, the two reflection groups and the light splitting element are located on the second optical axis, and the light splitting element is disposed on the Between the two reflection groups, the light beam is reflected by one of the two reflection groups and transmitted through the light splitting element, and the light beam is reflected by the other one of the two reflection groups and reflected by the light splitting element to the photosensitive element, Each of the two reflection groups includes a quarter wave plate and a reflection element. According to the head-mounted electronic device described in claim 9, wherein the light source detection modules are disposed at opposite ends of the housing. According to the head-mounted electronic device described in claim 9, wherein the light source detection modules are arranged on the housing in a manner surrounding the housing. For the head-mounted electronic device described in claim 9, wherein the light source detection modules are arranged in the housing, and the light source detection modules are respectively arranged in different directions and receive correspondingly The light beams in different directions.

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