TW202314328A - Short-focus optical module - Google Patents

Abstract

A short-focus optical module has a transmissive area and a non-transmissive area, and includes a lens assembly, a display, a phase retarder, a first reflector, a second reflector, and a linear polarizer. The lens assembly includes a first lens and a second lens. The first lens is at least partially located in the non-transmissive area. The second lens is located in the non-transmissive area and stacked with the first lens. The display is configured to generate an image towards the first lens, in which the light generated by the image is circularly polarized light. The phase retarder is located in the non-transmissive area and is configured to convert the circularly polarized light into linearly polarized light. The first reflector is configured to reflect the linearly polarized light. The second reflector is configured to reflect the light reflected by the first reflector. The linear polarizer is configured to allow the light reflected by the second reflector to pass.

Description

Short focus optical module

The present disclosure relates to a short-focus optical module.

Augmented Reality (AR, Augmented Reality) is a technology that can amplify virtual information into real space. Users can increase their awareness of the world by mixing virtual and real elements. Augmented reality has been widely used in daily life, such as satellite navigation, mobile games or flight simulation exercises.

In recent years, the concept of Mixed Reality (MR, Mixed Reality) has emerged in related technical fields. What MR and AR have in common is that they generate virtual objects to amplify the real world, but the difference between MR and AR is that the virtual objects generated by MR can appear in real life. In addition, MR can interact and combine virtual scenes with the real world more. Users can even change the virtual scene through actions in the real world. In order to meet the needs of users to realize AR or MR in the real world, it is the most popular research and development focus in recent years to propose a short-focus optical module that can be easily worn and carried by users, and can enjoy a complete AR or MR experience. .

Therefore, how to propose a short-focus optical module to realize augmented reality or mixed reality is one of the problems that the industry is eager to invest in research and development resources to solve.

In view of this, one purpose of the present disclosure is to propose a short-focus optical module that can solve the above-mentioned problems.

In order to achieve the above object, according to an embodiment of the present disclosure, a short-focus optical module has a transmission area and a non-transmission area, and includes a lens assembly, a display, a phase retarder, a first reflector, a second reflector, and a linear polarizer piece. The lens assembly includes a first lens and a second lens. The first lens is at least partially located in the non-transmissive area. The second lens is located in the non-transmission area and overlaps with the first lens. The display is configured to generate an image toward the first lens, wherein the light generated by the image is circularly polarized light. The phase retarder is located in the non-transmissive area and is configured to convert circularly polarized light into linearly polarized light. The first reflector is arranged on the side of the second lens away from the first lens, and configured to reflect linearly polarized light. The second reflector is arranged on the side of the first lens away from the second lens, and configured to reflect the light reflected by the first reflector. The linear polarizer is arranged on the side of the second lens away from the first lens, and configured to allow the light reflected by the second reflector to pass through.

In one or more embodiments of the present disclosure, the display is disposed on a side of the first lens away from the second lens.

In one or more embodiments of the present disclosure, the linearly polarized light is polarized in a polarization direction, the first reflector is substantially a reflective polarizer, and the reflective polarizer is configured to reflect light polarized in the polarization direction.

In one or more embodiments of the present disclosure, the linearly polarized light is polarized in a polarization direction, and the second reflector is substantially a reflective polarizer configured to reflect light polarized in the polarization direction.

In one or more embodiments of the present disclosure, the first lens extends from the non-transmission area to the transmission area.

In one or more embodiments of the present disclosure, the lengths of the first lens and the second lens are substantially different.

In one or more embodiments of the present disclosure, the second reflector extends from the non-transmissive region to the transmissive region.

In one or more embodiments of the present disclosure, the lengths of the first lens and the second lens are substantially the same.

In one or more embodiments of the present disclosure, the phase retarder is disposed between the first lens and the second lens.

In one or more embodiments of the present disclosure, the lens assembly further includes a third lens disposed in the transmission area, and the third lens is adjacent to the first lens.

In one or more embodiments of the present disclosure, the third lens is substantially separate from the first lens.

In one or more implementations of the present disclosure, the phase retarder is disposed on the side of the first lens away from the second lens.

In one or more embodiments of the present disclosure, the first lens, the second lens and the third lens are convex, concave, symmetrical, asymmetrical or irregular lenses.

In one or more embodiments of the present disclosure, the short-focus optical module further includes an antireflection coating, and the antireflection coating is disposed on the side of the first lens away from the second lens and/or the second lens is away from the first lens that side of the .

To sum up, in the short-focus optical module of the present disclosure, because the second reflector is provided, users can use the short-focus optical module as polarized glasses. In the short-focus optical module of the present disclosure, because the third lens is provided, the user can wear general glasses equipped with a short-focus optical system to form a virtual image in the transmission area where the general glasses are located. In the short-focus optical module of the present disclosure, since the display is arranged within the focal length of the imaging system formed by the short-focus optical module, the virtual image formed by the image of the display in the transmission area is a magnified virtual image. In the short-focus optical module disclosed in the present disclosure, a short-focus optical system is realized through the arrangement of lens components, phase retarders, first reflectors, second reflectors, and linear polarizers, thereby displaying augmented reality or Mixed reality.

The above description is only used to explain the problems to be solved by the present disclosure, the technical means to solve the problems, and the effects thereof, etc. The specific details of the present disclosure will be introduced in detail in the following implementation methods and related drawings.

The following will disclose multiple implementations of the present disclosure with diagrams, and for the sake of clarity, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the present disclosure. That is to say, in some embodiments of the present disclosure, these practical details are unnecessary. In addition, for the sake of simplifying the drawings, some well-known structures and components will be shown in a simple and schematic manner in the drawings. The same reference numbers will be used throughout the drawings to refer to the same or similar elements.

The following will introduce in detail the structure, function and connection relationship of each component included in the short-focus optical module 100 of the present disclosure, and introduce several implementations of the short-focus optical module 100 of the present disclosure in sequence.

Firstly, the first embodiment of the short-focus optical module 100 of the present disclosure will be described.

As shown in FIG. 1 , in this embodiment, the short-focus optical module 100 has a non-transmission area A1 and a transmission area A2 , and the transmission area A2 is adjacent to the non-transmission area A1 . For example, in FIG. 1 , the transmissive area A2 is located on the right side of the non-transmissive area A1 . The short-focus optical module 100 includes a lens assembly 110 , a display D, a phase retarder 120 , a first reflector 130 , a second reflector 140 , a linear polarizer 150 and an anti-reflection coating 160 . The lens assembly 110 includes a first lens 112 and a second lens 114 . The first lens 112 is located in the non-transmission area A1 and extends from the non-transmission area A1 to the transmission area A2. The second lens 114 is located in the non-transmissive area A1 and overlapped with the first lens 112 . The display D is configured to generate an image I toward the first lens 112, and the light L generated by the image I is circularly polarized light (for example, right-handed polarized light or left-handed polarized light). The phase retarder 120 is located in the non-transmissive area A1, and is disposed on a side of the first lens 112 away from the second lens 114, and is configured to convert circularly polarized light into linearly polarized light. The first reflector 130 is disposed on a side of the second lens 114 away from the first lens 112 and configured to reflect linearly polarized light. The second reflector 140 is disposed on a side of the first mirror 112 away from the second mirror 114 and configured to reflect the light L reflected by the first reflector 130 . The linear polarizer 150 is disposed on a side of the second lens 114 away from the first lens 112 , and configured to allow the light L reflected by the second reflector 140 to pass through. The anti-reflection coating 160 is disposed on a side of the first lens 112 away from the second lens 114, configured to increase the contrast of the image I and reduce artifacts.

In some embodiments, the phase retarder 120 is substantially a quarter-wave plate, but the present disclosure is not limited thereto. In some embodiments, as long as it is an element capable of converting the light L between linearly polarized light and circularly polarized light, it is within the spirit and scope of the present disclosure.

In some embodiments, first reflector 130 may be a reflective polarizer. As shown in FIG. 1, the reflective polarizer is configured to reflect light polarized in a first polarization direction (eg, Y direction) and configured to allow light polarized in a second polarization direction (eg, X direction) to pass therethrough.

In some embodiments, the second reflector 140 can be a reflective polarizer. As shown in FIG. 1, the reflective polarizer is configured to reflect light polarized in a first polarization direction (eg, Y direction) and configured to allow light polarized in a second polarization direction (eg, X direction) to pass therethrough.

In some embodiments, as shown in FIG. 1 , the linear polarizer 150 may allow linearly polarized light polarized in a specific polarization direction to pass therethrough. For example, the linear polarizer 150 may be a polarizer that only allows linearly polarized light in the Y direction to pass through.

With the aforementioned structural configuration, in an application scenario, as shown in FIG. 1 , the light L generated by the display D located in the non-transmissive area A1 is circularly polarized light (eg, right-handed polarized light). First, the right-handed polarized light passes through the phase retarder 120 when entering the first lens 112 , so that the right-handed polarized light is converted into linearly polarized light (for example, Y-direction linearly polarized light) through the phase retarder 120 . Then, the linearly polarized light passes through the second lens 114 from the first lens 112 to the first reflector 130 . Next, the first reflector 130 reflects the linearly polarized light, so that the linearly polarized light passes from the second lens 114 to the second reflector 140 through the first lens 112 . Then, the second reflector 140 reflects the linearly polarized light reflected by the first reflector 130 , so that the linearly polarized light passes through the second lens 114 from the first lens 112 to reach the linear polarizer 150 again. Next, the linear polarizer 150 allows linearly polarized light in a specific direction (for example, linearly polarized light in the Y direction) to pass through, and the linearly polarized light passes through the anti-reflection coating 160 and finally reaches the naked eye NE located in the transmission area A2. In this way, the naked eye NE can not only see the external environment through the transmission area A2, but also see the virtual image VI formed by the image I generated by the display D through the short-focus optical module 100 in the direction of viewing the transmission area A2. After the virtual image VI is superimposed on the scene of the real world, the mixed reality can be realized. Through the arrangement of reflective polarizers such as the first reflector 130 and the second reflector 140 , the light L undergoes multiple reflections in the short-focus optical module 100 to shorten the optical path, thereby achieving the effect of "short focus".

Next, the second embodiment of the short-focus optical module 100 of the present disclosure will be continuously described.

As shown in FIG. 2 , in this embodiment, the short-focus optical module 100 has the same non-transmissive area A1 and transmissive area A2 as those in FIG. 1 . The short-focus optical module 100 in FIG. 2 has approximately the same structural configuration as the short-focus optical module 100 in FIG. 1, and the main difference between the two is that the second reflector 140 in FIG. Extends from the non-transmissive area A1 to the transmissive area A2.

With the aforementioned structural configuration, in a usage scenario, as shown in FIG. 2 , the user can use an imaging method similar to that shown in FIG. 1 , so that the naked eye NE can see the image generated by the display D through the transmission area A2 I is a virtual image VI formed by the short-focus optical module 100 . Since the imaging method of the virtual image VI in the second embodiment is the same as that in the first embodiment, it will not be repeated here.

In some embodiments, the main difference between the second embodiment described here and the aforementioned first embodiment is that the second reflector 140 in FIG. Reflective polarizer, because the reflective polarizer can only allow light polarized in a certain polarization direction in the external environment to pass through and reach the naked eye NE, so the naked eye NE can see the image I generated by the display D in the direction of viewing the transmission area A2 by When the virtual image VI formed by the short-focus optical module 100 is used, the brightness of the field of view will be relatively low. In a usage scenario, the user can use the short-focus optical module 100 of this embodiment as polarized glasses for sunglasses.

Next, the third embodiment of the short-focus optical module 100 of the present disclosure will be continuously described.

As shown in FIG. 3 , in this embodiment, the short-focus optical module 100 has the same non-transmission area A1 and transmission area A2 as those in FIGS. 1 and 2 . In this embodiment, the short-focus optical module 100 includes a lens assembly 110 , a display D, a phase retarder 120 , a first reflector 130 , a second reflector 140 , a linear polarizer 150 and an anti-reflection coating 160 . The lens assembly 110 includes a first lens 112 and a second lens 114 . The first lens 112 is located in the non-transmission area A1 and extends from the non-transmission area A1 to the transmission area A2. The second lens 114 is located in the non-transmissive area A1 and does not extend to the transmissive area A2. The display D is configured to generate an image I toward the first lens 112, and the light L generated by the image I is circularly polarized light (for example, right-handed polarized light or left-handed polarized light). The phase retarder 120 is located in the non-transmissive area A1. However, the difference between this embodiment and the aforementioned first and second embodiments is that the phase retarder 120 of this embodiment is arranged on the first mirror 112 and the second mirror. 114 and configured to convert the light L between circularly polarized light and linearly polarized light. The first reflector 130 is disposed on a side of the second lens 114 away from the first lens 112 and configured to reflect linearly polarized light. The second reflector 140 is disposed on a side of the first mirror 112 away from the second mirror 114 and configured to reflect the light L reflected by the first reflector 130 . Since the light L is transformed by the phase retarder 120 again before reaching the second reflector 140 , the light L reaching the second reflector 140 is circularly polarized light. The linear polarizer 150 is disposed on a side of the second lens 114 away from the first lens 112 , and configured to allow the light L reflected by the second reflector 140 to pass through. Since the light L is transformed by the phase retarder 120 again before reaching the linear polarizer 150 , the light L reaching the linear polarizer 150 is linearly polarized light. In addition, another difference between this embodiment and the aforementioned first and second embodiments is that the anti-reflection coating 160 of this embodiment is provided on the side of the first lens 112 away from the second lens 114 and the second lens 112 114 away from the side of the first lens 112 .

In some embodiments, first reflector 130 may be a reflective polarizer. As shown in FIG. 3, the reflective polarizer is configured to reflect light polarized in a first polarization direction (eg, Y direction) and configured to allow light polarized in a second polarization direction (eg, X direction) to pass therethrough.

In some embodiments, the second reflector 140 can be a reflective polarizer. As shown in FIG. 3, the reflective polarizer is configured to reflect circularly polarized light (e.g., right-handedly polarized light) polarized in a first circular polarization direction such that this circularly polarized light polarized in the first circular polarization direction is transformed into Circularly polarized light polarized in a second circular polarization direction (eg, left-handed polarized light).

In some embodiments, as shown in FIG. 3 , the linear polarizer 150 may allow linearly polarized light polarized in a specific polarization direction to pass therethrough. For example, the linear polarizer 150 may be a polarizer that only allows linearly polarized light in the X direction to pass through.

With the aforementioned structural configuration, in an application scenario, as shown in FIG. 3 , the light L generated by the display D located in the non-transmissive area A1 is circularly polarized light (eg, right-handed polarized light). Firstly, when the right-handed polarized light enters the first lens 112 , it passes through the anti-reflection coating 160 before entering the first lens 112 . Next, the right-handed polarized light passes through the first lens 112 and reaches the phase retarder 120 . The phase retarder 120 converts right-handed polarized light into linearly polarized light (for example, Y-direction linearly polarized light). Then, the linearly polarized light passes through the second lens 114 and reaches the first reflector 130 . Next, the first reflector 130 reflects the linearly polarized light, so that the linearly polarized light passes through the second lens 114 and reaches the phase retarder 120 . Phase retarders convert linearly polarized light into right-handed polarized light. Then, the right-handed polarized light passes through the first lens 112 and reaches the second reflector 140 . Next, as shown in FIG. 3 , the second reflector 140 reflects right-handed polarized light, so that the reflected right-handed polarized light becomes left-handed polarized light. Then the left-handed polarized light passes through the first lens 112 and reaches the phase retarder 120 . The phase retarder 120 converts left-handed polarized light into linearly polarized light (for example, X-direction linearly polarized light). Then, the linearly polarized light passes through the second lens 114 and reaches the first reflector 130 and the linear polarizer 150 again. Next, the first reflector 130 and the linear polarizer 150 simultaneously allow linearly polarized light in a specific direction (for example, linearly polarized light in the X direction) to pass through, and the linearly polarized light passes through the anti-reflection coating 160 and finally arrives at the transmission area A2 The naked eye NE. In this way, the naked eye NE can see the virtual image VI formed by the image I generated by the display D through the short-focus optical module 100 through the transmission area A2.

In some embodiments, as shown in FIG. 3 , the first reflector 130 covers the entire second mirror 114 , but the present disclosure is not limited thereto. In some embodiments, the first reflector 130 may only cover a portion of the second mirror 114 (for example, the first reflector 130 may only cover the left half of the second mirror 114), so that the linear polarizer 150 may contact The second lens 114 also covers the right half area (not shown) of the second lens 114 .

Next, the fourth embodiment of the short-focus optical module 100 of the present disclosure will be continuously described.

As shown in FIG. 4 , in this embodiment, the short-focus optical module 100 has the same non-transmissive area A1 and transmissive area A2 as those in FIG. 1 , FIG. 2 and FIG. 3 . The short-focus optical module 100 in FIG. 4 has approximately the same structural configuration as the short-focus optical module 100 in FIG. 3 . The main difference between the two is that the second reflector 140 in FIG. Extends from the non-transmissive area A1 to the transmissive area A2.

With the aforementioned structural configuration, in a usage scenario, as shown in FIG. 4 , the user can use an imaging method similar to that shown in FIG. 3 , so that the naked eye NE can see the image generated by the display D through the transmission area A2 I is a virtual image VI formed by the short-focus optical module 100 . Since the imaging method of the virtual image VI in the fourth embodiment is the same as that in the third embodiment, it will not be repeated here.

In some embodiments, the main difference between the fourth embodiment described here and the foregoing third embodiment is that the second reflector 140 in FIG. Reflective polarizer, because the reflective polarizer can only allow light polarized in a certain polarization direction in the external environment to pass through and reach the naked eye NE, so the naked eye NE can see the image I generated by the display D in the direction of viewing the transmission area A2 by When the virtual image VI formed by the short-focus optical module 100 is used, the brightness of the field of view will be relatively low. In a usage scenario, the user can use the short-focus optical module 100 of this embodiment as polarized glasses for sunglasses.

Next, the fifth embodiment of the short-focus optical module 100 of the present disclosure will be continuously described.

As shown in FIG. 5 , in this embodiment, the short-focus optical module 100 has a non-transmission area A1 and a transmission area A2 , and the transmission area A2 is adjacent to the non-transmission area A1 . For example, in FIG. 5 , the transmissive area A2 is located on the right side of the non-transmissive area A1 . The short-focus optical module 100 includes a lens assembly 110 , a display D, a phase retarder 120 , a first reflector 130 , a second reflector 140 , a linear polarizer 150 and an anti-reflection coating 160 . The difference between this embodiment and the first to fourth embodiments is that the lens assembly 110 of this embodiment further includes a third lens 116 in addition to the first lens 112 and the second lens 114 . The first lens 112 is located in the non-transmissive area A1 and does not extend to the transmissive area A2. The second lens 114 is located in the non-transmissive area A1 and does not extend to the transmissive area A2. The third lens 116 is disposed in the transmission area A2 , and the third lens 116 is adjacent to the first lens 112 . The structural configuration of the display D, the phase retarder 120, the first reflector 130, the second reflector 140, the linear polarizer 150 and the anti-reflection coating 160 in Fig. 5 is substantially the same as that shown in Fig. 3 The configuration is similar.

With the aforementioned structural configuration, in a usage scenario, as shown in FIG. 5, the user can use an imaging method similar to that shown in FIG. 1, so that the naked eye NE can see the image generated by the display D through the transmission area A2 I is a virtual image VI formed by the short-focus optical module 100 . However, the difference between this embodiment and the first embodiment is that the user's naked eyes NE view the virtual image VI through the third lens 116 in the transmission area A2.

In some embodiments, the third optic 116 is substantially separate from the first optic 112 .

In some embodiments, the third lens 116 may be general eyeglasses independent of the non-transmissive area A1. For example, in this embodiment, the user can wear general glasses, and then use the general glasses together with the short-focus optical system disposed in the non-transmission area A1 to complete this embodiment.

Next, the sixth embodiment of the short-focus optical module 100 of the present disclosure will be described continuously.

As shown in FIG. 6 , in this embodiment, the short-focus optical module 100 has the same non-transmission area A1 and transmission area A2 as those in FIG. 5 . However, the difference between this embodiment and the third embodiment is that the lens assembly 110 of this embodiment further includes a third lens 116 in addition to the first lens 112 and the second lens 114 . The first lens 112 is located in the non-transmissive area A1 and does not extend to the transmissive area A2. The second lens 114 is located in the non-transmissive area A1 and does not extend to the transmissive area A2. The third lens 116 is disposed in the transmission area A2 , and the third lens 116 is adjacent to the first lens 112 . The structural configuration of the display D, the phase retarder 120, the first reflector 130, the second reflector 140, the linear polarizer 150 and the anti-reflection coating 160 in Fig. 5 is substantially the same as that shown in Fig. 3 The configuration is similar.

With the aforementioned structural configuration, in a usage scenario, as shown in FIG. 5 , the user can use an imaging method similar to that shown in FIG. 3 , so that the naked eye NE can see the image generated by the display D through the transmission area A2 I is a virtual image VI formed by the short-focus optical module 100 . However, the difference between this embodiment and the third embodiment is that the user's naked eyes NE view the virtual image VI through the third lens 116 in the transmission area A2.

In this embodiment, since the third lens 116 is provided similarly to the fifth embodiment, the user can wear general glasses, and then use the general glasses together with the short-focus optical system installed in the non-transmission area A1 to complete the This embodiment.

By implementing the above-mentioned first embodiment to the sixth embodiment, the user can realize augmented reality or mixed reality through the short-focus optical module 100 of the present disclosure.

In some embodiments, as shown in FIGS. 1 to 4 , the lengths of the first lens 112 and the second lens 114 are different, but the present disclosure is not limited thereto. In some embodiments, in FIGS. 1 to 4 , the lengths of the first lens 112 and the second lens 114 may be the same. Specifically, the length of the second lens 114 may be the same as that of the first lens 112 as shown in FIGS. 1 to 4 . In the embodiment in which the lengths of the first lens 112 and the second lens 114 are the same, because multiple groups of lenses have a more significant ability to adjust light concentration or divergence than a single lens, the first lens 112 and the second lens 114 are designed as The equal length can achieve the effect of adjusting the focal length, thereby more flexibly adjusting the wearing of the short-focus optical module 100 suitable for hyperopia and myopia.

In some embodiments, the first lens 112 , the second lens 114 and the third lens 116 are convex, concave, symmetrical, asymmetrical or irregular lenses. In other words, the present disclosure is not intended to limit the lens models of the first lens 112 , the second lens 114 and the third lens 116 .

In some embodiments, the phase retarder 120 is substantially a quarter-wave plate, but the present disclosure is not limited thereto. In some embodiments, as long as it is an element capable of converting the light L between linearly polarized light and circularly polarized light, it is within the spirit and scope of the present disclosure.

In some embodiments, the first reflector 130 and the second reflector 140 are substantially linear polarizers, but the present disclosure is not limited thereto. In some implementations, the first reflector 130 and the second reflector 140 can be any reflective sheet or polarizer that can reflect the light L in a specific direction.

In some embodiments, the number of the first reflector 130 and the number of the second reflector 140 is one, but the present disclosure is not limited thereto. In some implementations, as long as the entire short-focus optical module 100 can achieve the purpose of short-focus imaging, the number of the first reflector 130 and the number of the second reflector 140 can be greater than one.

In some embodiments, the anti-reflection coating 160 is at least disposed on the side of the first lens 112 away from the second lens 114 or the side of the second lens 114 away from the first lens 112 , but the disclosure is not limited thereto. In other words, as long as the anti-reflection coating 160 is at least disposed on the side where the light L is incident toward the lens assembly 110 or the side where the light L is emitted from the lens assembly 110 , it is within the spirit and scope of the present disclosure. Besides, the present disclosure does not intend to limit the number of anti-reflection coatings 160 provided.

In some embodiments, the short-focus optical module 100 is provided with an anti-reflection coating 160 , but the present disclosure is not limited thereto. In some embodiments, if the image I passes through the optical system composed of the lens assembly 110, the phase retarder 120, the first reflector 130, the second reflector 140, and the linear polarizer 150, the naked eye NE can perceive a sufficiently high If the light L with high contrast and sufficiently small ghost phenomenon, the short-focus optical module 100 may not be provided with the anti-reflection coating 160 .

In some implementations, for example, as shown in FIGS. 1 to 6 , the non-transmissive area A1 may be located above, below, left or right of the entire short-focus optical module 100 . In some implementations, more generally, the non-transmissive area A1 may be located in the peripheral area of the entire short-focus optical module 100 .

In some implementations, the user can use an electronic device (for example, a smart phone) or a lens additionally provided on the short-focus optical module 100 plus a networked device for the display D to generate the image I.

In some embodiments, the display D is disposed on a side of the first lens 112 away from the second lens 114 , but the disclosure is not limited thereto. In some implementations, the display D can also be disposed on the side of the second lens 114 away from the first lens 112 . In the embodiment where the display D is arranged on the side of the second lens 114 away from the first lens 112, the short-focus optical module 100 may correspondingly only include one reflector (for example, only one first reflector 130 or one second reflector 140). In other words, the present disclosure does not intend to limit the position of the display D in the short-focus optical module 100 as long as the purpose of the “short-focus” optical system can be achieved.

In some embodiments, since the size of the display D is smaller than the size of the transmissive area A2, and the display D is set within the focal length of the imaging system formed by the short-focus optical module 100, the image I of the display D is captured by the short-focus The virtual image VI formed by the optical module 100 is substantially a magnified virtual image. This is an important purpose that this disclosure intends to achieve. In other words, as long as the relatively small-sized display D utilizes the principle of optical imaging to generate a structure or design of a magnified virtual image, it is within the spirit and scope of the present disclosure.

From the above detailed description of the specific implementation of the present disclosure, it can be clearly seen that in the short-focus optical module of the present disclosure, because the second reflector is provided, the user can use the short-focus optical module as a polarizer glasses to use. In the short-focus optical module of the present disclosure, because the third lens is provided, the user can wear general glasses equipped with a short-focus optical system to form a virtual image in the transmission area where the general glasses are located. In the short-focus optical module of the present disclosure, since the display is arranged within the focal length of the imaging system formed by the short-focus optical module, the virtual image formed by the image of the display in the transmission area is a magnified virtual image. In the short-focus optical module disclosed in the present disclosure, a short-focus optical system is realized through the arrangement of lens components, phase retarders, first reflectors, second reflectors, and linear polarizers, thereby displaying augmented reality or Mixed reality.

Although the present disclosure has been disclosed above in terms of implementation, it is not intended to limit this disclosure. Any person skilled in the art may make various changes and modifications without departing from the spirit and scope of this disclosure. Therefore, the protection of this disclosure The scope shall be defined by the scope of the appended patent application.

100:Short focus optical module 110: Lens assembly 112: The first lens 114: second lens 116: The third lens 120:Phase delay film 130: first reflector 140: second reflector 150: linear polarizer 160: anti-reflection coating A1: Non-transmissive area A2: Transmission area D: monitor I: Image L: light NE: naked eye VI: virtual image

In order to make the above and other purposes, features, advantages and embodiments of the present disclosure more comprehensible, the accompanying drawings are described as follows: FIG. 1 is a schematic diagram of a short-focus optical module according to an embodiment of the present disclosure. FIG. 2 is a schematic diagram of a short-focus optical module according to an embodiment of the present disclosure. FIG. 3 is a schematic diagram of a short-focus optical module according to an embodiment of the present disclosure. FIG. 4 is a schematic diagram of a short-focus optical module according to an embodiment of the present disclosure. FIG. 5 is a schematic diagram of a short-focus optical module according to an embodiment of the present disclosure. FIG. 6 is a schematic diagram of a short-focus optical module according to an embodiment of the present disclosure.

Domestic deposit information (please note in order of depositor, date, and number) none Overseas storage information (please note in order of storage country, institution, date, and number) none

100:Short focus optical module

110: Lens assembly

112: The first lens

114: second lens

120:Phase delay film

130: first reflector

140: second reflector

150: linear polarizer

160: anti-reflection coating

A1: Non-transmissive area

A2: Transmission area

D: monitor

I: Image

L: light

NE: naked eye

VI: virtual image

Claims (14)

A short-focus optical module has a transmission area and a non-transmission area, and includes: A lens assembly, comprising: a first lens at least partially located in the non-transmissive region; and a second lens, located in the non-transmission area, and superposed with the first lens; a display configured to generate an image toward the first lens, wherein one of the light rays generated by the image is a circularly polarized light; a phase retarder, located in the non-transmission area, and configured to convert the circularly polarized light into linearly polarized light; a first reflector, arranged on the side of the second lens away from the first lens, and configured to reflect the linearly polarized light; a second reflector, disposed on the side of the first lens away from the second lens, and configured to reflect light reflected by the first reflector; and The linear polarizer is arranged on the side of the second lens away from the first lens, and configured to allow the light reflected by the second reflector to pass through. The short-focus optical module as claimed in claim 1, wherein the display is disposed on the side of the first lens away from the second lens. The short-focus optical module as claimed in item 1, wherein the linearly polarized light is polarized in a polarization direction, the first reflector is substantially a reflective polarizer, and the reflective polarizer is configured to reflect in the polarization direction Polarized light. The short-focus optical module as claimed in item 1, wherein the linearly polarized light is polarized in a polarization direction, and the second reflector is substantially a reflective polarizer, and the reflective polarizer is configured to reflect in the polarization direction Polarized light. The short-focus optical module as claimed in claim 4, wherein the first lens extends from the non-transmission area to the transmission area. The short-focus optical module as claimed in claim 5, wherein the lengths of the first lens and the second lens are substantially different. The short-focus optical module as claimed in claim 5, wherein the second reflector extends from the non-transmission area to the transmission area. The short-focus optical module as claimed in claim 5, wherein the lengths of the first lens and the second lens are substantially the same. The short-focus optical module as claimed in claim 4, wherein the phase retarder is disposed between the first lens and the second lens. The short-focus optical module as claimed in claim 1, wherein the lens assembly further includes a third lens disposed in the transmission area, and the third lens is adjacent to the first lens. The short-focus optical module as claimed in claim 10, wherein the third lens is substantially separated from the first lens. The short-focus optical module according to claim 10, wherein the phase retarder is disposed on the side of the first lens away from the second lens. The short-focus optical module according to claim 10, wherein the first lens, the second lens, and the third lens are convex, concave, symmetrical, asymmetrical, or irregular in shape. The short-focus optical module as described in claim 1, further comprising an anti-reflection coating, the anti-reflection coating is disposed on the side of the first lens away from the second lens and/or the second lens is far away from the second lens the side of a lens.

Images