TWI761022B - Optical system - Google Patents

Abstract

An optical system including a display and an optical polarization system is provided. The display emits a first linearly polarized light. The optical polarization system includes a first wave plate, a second wave plate, and a linear polarizer. The first wave plate converts the first linearly polarized light into a circularly polarized light, which can solve the color shift of a large viewing angle. The second wave plate converts the circularly polarized light into a second linearly polarized light. Finally, the stray light in the second linearly polarized light is filtered by the linear polarizer and enters a person's eye. Since there is no reflective element in the optical polarization system of the present invention, there is no loss of light, and 100% light utilization can be achieved.

Description

Optical system

The present invention relates to an optical system, in particular to an optical system which can solve the color shift of a large viewing angle and improve the utilization rate of light.

The optical systems of traditional augmented reality and virtual reality include optical elements such as displays, transflective lenses, phase retarders, multilayer reflective polarizers, lenses and linear polarizers. The display as a light source can emit light. The display includes a display screen that emits light and a virtual reality optical module. Generally speaking, the virtual reality optical module is a combination of a linear polarizer and a phase retarder, so that the light emitted by the display is circularly polarized light.

After the circularly polarized light emitted by the display reaches the semi-reflective and semi-transparent lens, only half of the circularly polarized light will penetrate the semi-reflective and semi-transparent lens to reach the phase retarder, and the other half of the circularly polarized light will be reflected back to the display. 50% left. Then, the circularly polarized light becomes linearly polarized light after passing through the phase retarder. After passing through the multilayer reflective polarizer, nearly half of the light will be reflected, and finally the linearly polarized light that passes through the multilayer reflective polarizer will be reflected. Only 25% left. Therefore, the augmented reality optical system of the prior art wastes too much light, and the illumination reaches the human eye too low. How to improve the light utilization rate is a problem to be solved.

Therefore, the present invention proposes an optical system to effectively improve the light utilization rate of the optical system and improve the problem of large viewing angle deviation in view of the above-mentioned deficiencies of the prior art and future needs. The specific structure and its implementation will be described in detail below:

The main purpose of the present invention is to provide an optical system, which uses a two-phase retarder to replace the semi-transmissive semi-reflective lens and the multi-layer reflective polarizer in the optical system in the prior art. Since the light does not need to be reflected, it will not lose energy. , which ensures that the light is almost 100% utilized.

Another object of the present invention is to provide an optical system, wherein the fast axis of the first phase retardation plate and the fast axis of the second phase retardation plate are perpendicular to each other, so that the linearly polarized light emitted by the display is rounded after passing through the first phase retardation plate Polarized light can solve the color shift of large viewing angle, and then becomes the polarization direction of the original linearly polarized light after passing through the second phase retarder.

In order to achieve the above object, the present invention provides an optical system, comprising: a display, which emits a first linearly polarized light; and an optical polarization system, which is arranged relative to the display to receive the first linearly polarized light, and the optical polarization system includes: a first linearly polarized light a phase retardation plate, which converts the first linearly polarized light into a circularly polarized light; a second phase retardation plate, which is arranged relative to the first phase retardation plate and converts the circularly polarized light into a second linearly polarized light; and a linear polarizing plate, which is opposite to the first phase retardation plate. The two-phase retarder is set up to filter out the stray light in the second linearly polarized light and then enter the human eye.

According to an embodiment of the present invention, the optical polarization system further includes a first lens disposed between the first phase retardation plate and the second phase retardation plate to magnify a virtual image of the display.

According to an embodiment of the present invention, the optical polarization system further includes a second lens, which is arranged between the linear polarizer and the human eye, or between the second phase retardation plate and the linear polarizer, for adjusting the Aberration or focal length of an optical polarization system.

According to an embodiment of the present invention, the second phase retardation plate is attached to the first lens or the second lens.

According to an embodiment of the present invention, the linear polarizer is attached to the second lens.

According to an embodiment of the present invention, the second phase retardation plate and the linear polarizer are attached to each other, and then attached to the first lens or the second lens.

According to the embodiment of the present invention, the fast axis of the first phase retarder and the fast axis of the second phase retarder are perpendicular to each other.

According to an embodiment of the present invention, the light emitted by the linear polarizer is parallel to the polarization direction of the first linearly polarized light emitted by the display.

According to an embodiment of the present invention, the display further includes a display screen and a linear polarization unit, the linear polarization unit is located between the display screen and the first phase retarder, and the light emitted by the display screen passes through the linear polarization unit, and then emits the first linear polarization unit. Light.

According to an embodiment of the present invention, the display further includes a display screen, a phase delay unit and a linear polarization unit, the phase delay unit is located between the display screen and the linear polarization unit, and the linear polarization unit is located between the phase delay unit and the first phase retardation plate In between, the light emitted by the display screen passes through the phase delay unit and the linear polarization unit, and then emits the first linearly polarized light.

According to an embodiment of the present invention, the included angle between the fast axis or the slow axis of the first phase retarder and the linear polarization direction of the linear polarization unit is 45 degrees.

According to an embodiment of the present invention, the first phase retarder and the second phase retarder are phase retarders retarded by 1/4 wavelength.

According to an embodiment of the present invention, the first lens is a Fresnel lens or a meniscus lens group.

According to an embodiment of the present invention, the second lens is a single concave lens or a single convex lens.

The disclosure is specifically described with the following examples, which are only for illustration, because for those skilled in the art, various changes and modifications can be made without departing from the spirit and scope of the present disclosure. The scope of protection of the disclosed contents shall be determined by the scope of the appended patent application. Throughout the specification and claims, unless the content clearly dictates otherwise, the meanings of "a" and "the" include that such recitations include "one or at least one" of the element or ingredient. Furthermore, as used in this disclosure, singular articles also include recitations of plural elements or components unless it is obvious from the specific context that the plural is excluded. Also, as used in this description and throughout the claims below, the meaning of "in" may include "in" and "on" unless the content clearly dictates otherwise. The terms used throughout the specification and the scope of the patent application, unless otherwise specified, generally have the ordinary meaning of each term used in the field, in the content disclosed herein and in the specific content. Certain terms used to describe the present disclosure are discussed below or elsewhere in this specification to provide practitioners with additional guidance in describing the present disclosure. Examples anywhere throughout the specification, including the use of examples of any terms discussed herein, are by way of illustration only, and of course do not limit the scope and meaning of the disclosure or any exemplified terms. Likewise, the present disclosure is not limited to the various embodiments set forth in this specification.

The terms "substantially", "around", "about" or "approximately" as used herein shall generally mean within 20% of a given value or range, The best line is within 10%. Furthermore, quantities provided herein may be approximate, and thus are meant to be expressed in terms of the words "about," "about," or "approximately," unless specifically stated otherwise. When a quantity, concentration or other value or parameter has a specified range, a preferred range or a table listing upper and lower ideal values, it shall be deemed to specifically disclose all ranges formed by any pair of upper and lower limits or ideal values, regardless of whether Whether those ranges are disclosed separately. For example, if a certain length of the disclosed range is X cm to Y cm, it should be deemed that the disclosed length is H cm and H can be any real number between X and Y.

Furthermore, if the term "electrically (sexually) coupled" or "electrically (sexually) connected" is used herein, it includes any means of direct and indirect electrical connection. For example, if it is described in the text that a first device is electrically coupled to a second device, it means that the first device can be directly connected to the second device, or indirectly connected to the second device through other devices or connecting means device. In addition, if the transmission and provision of electrical signals are described, those skilled in the art should be able to understand that the transmission of electrical signals may be accompanied by attenuation or other non-ideal changes. In fact, it should be regarded as the same signal. For example, if the electrical signal S is transmitted (or provided) from the terminal A of the electronic circuit to the terminal B of the electronic circuit, it may pass through the source and drain terminals of a transistor switch and/or possible stray capacitance. A voltage drop is generated, but if the purpose of this design is not to use the attenuation or other non-ideal changes generated during transmission (or supply) to achieve some specific technical effects, the electrical signal S is at the terminal A and the terminal of the electronic circuit. B should be regarded as substantially the same signal.

It is understood that the terms "comprising", "including", "having", "containing", "involving", etc. as used herein are open-ended open-ended, which means including but not limited to. In addition, any embodiment of the present invention or the scope of the claims is not required to achieve all of the objects or advantages or features disclosed herein. In addition, the abstract part and the title are only used to assist the search of patent documents, and are not used to limit the scope of the patent application of the present invention.

The present invention provides an optical system, which not only simplifies the number and types of lenses of the optical system, but also omits reflective lenses, such as partially penetrating and partially reflective lenses, reflectors, reflective polarizers and other elements, so as to avoid energy loss after light reflection , and the problem that the light reaching the human eye is less than 50%.

Please refer to FIG. 1 , which is a schematic diagram of a first embodiment of the optical system 10 of the present invention. The optical system 10 of the present invention includes a display 12 and an optical polarization system 14, which are disposed opposite to each other. The display 12 is used as a light source for emitting a first linearly polarized light to the optical polarization system 14 , and then the optical polarization system 14 enters the human eye 26 . In the first embodiment, the display 12 includes a display screen 122 and a linear polarization unit 124 , and the linear polarization unit 124 is located between the display screen 122 and the optical polarization system 14 . In this embodiment, the light emitted by the display screen 122 does not limit the polarization direction. When the display screen 122 emits light, the light will become linearly polarized light after passing through the linear polarization unit 124 , and the first linearly polarized light is emitted to the optical polarization system 14 . The optical polarization system 14 includes a first phase retardation plate 16 , a second phase retardation plate 18 and a linear polarization plate 20 , which are sequentially arranged in the optical polarization system 14 . The first phase retardation plate 16 is disposed opposite to the linear polarization unit 124 . In other words, the linear polarization unit 124 is located between the display screen 122 and the first phase retardation plate 16 . The first phase retardation plate 16 is a phase retardation plate that retards 1/4 wavelength, ie, a 1/4 wave plate, and is used to convert the first linearly polarized light into a circularly polarized light to solve the color shift at a large viewing angle. The second phase retardation plate 18 is disposed relative to the first phase retardation plate 16 and is also a 1/4 wave plate for converting the circularly polarized light into a second linearly polarized light. Finally, after the stray light in the second linearly polarized light is filtered out by the linear polarizer 20 disposed relative to the second phase retardation plate 18 , the second linearly polarized light from which the stray light is filtered is incident on the human eye 26 .

A first lens 22 can be disposed between the first phase retardation plate 16 and the second phase retardation plate 18 , and its function in the augmented reality optical system is to magnify a virtual image emitted by the display 12 . The first lens 22 may be a Fresnel lens or a concave-convex lens group, but not limited thereto. In addition, the optical polarization system 14 may further include a second lens 24. In the first embodiment, the second lens 24 is disposed between the linear polarizer 20 and the human eye 26, and its function is to adjust the aberration of the optical polarization system 14 or focal length. The second lens 24 can be a single concave lens or a single convex lens, but not limited thereto.

In the present invention, the fast axis X1 of the first phase retardation plate 16 and the fast axis X2 _of the _second phase retardation plate 18 are perpendicular to each other; in addition, the fast axis X1 or the slow axis of the _first phase retardation plate 16 is also in line with the line The angle between the linear polarization directions of the polarizing unit 124 is 45 degrees. In this way, the first linearly polarized light emitted by the display 12 can pass through the first phase retardation plate 16 to become circularly polarized light, and then pass through the second phase retardation plate 18. becomes the same as the polarization direction of the original first linearly polarized light. For example, it is assumed that the linear polarization angle of the light emitted by the display 12 is 90 degrees (it can also be 45 degrees, 135 degrees or other angles), as long as the fast axis X ₁ or the slow axis of the first phase retardation plate 16 and the linear polarization unit The angle between the linear polarization directions of 124 is 45 degrees, and the fast axis X 1 of the first phase retardation plate 16 and the fast axis X ₂ of the _second phase retardation plate 18 are perpendicular to each other, then the polarization of the second linearly polarized light finally emitted The direction can be returned to the original polarization direction of the first linearly polarized light emitted from the display 12 .

FIG. 2 is a schematic diagram of a second embodiment of the optical system 10 of the present invention, which slightly changes the structure of the display 12 in the first embodiment, but the effect produced remains unchanged. The optical system 10 of the second embodiment includes a display 12' and an optical polarization system 14, which are disposed opposite to each other. The display 12' is used as a light source to emit a first linearly polarized light to the optical polarization system 14, and then the optical polarization system 14 is incident on the human eye 26. In the second embodiment, the display 12' includes a display screen 122, a phase delay unit 123 and a linear polarization unit 124, the phase delay unit 123 is located between the display screen 122 and the linear polarization unit 124, and the linear polarization unit 124 is located in the phase Between the delay unit 123 and the optical polarization system 14, the light emitted by the display screen 122 does not limit the polarization direction, and after passing through the phase delay unit 123 and the linear polarization unit 124, it becomes linearly polarized light and emits the first linearly polarized light. The optical polarization system 14 includes a first phase retardation plate 16 , a first lens 22 , a second phase retardation plate 18 , a linear polarizer 20 and a second lens 24 in sequence. The first phase retardation plate 16 is disposed opposite to the linear polarization unit 124 . In other words, the linear polarization unit 124 is located between the display screen 122 and the first phase retardation plate 16 . The first phase retardation plate 16 is a phase retardation plate retarding 1/4 wavelength, that is, a 1/4 wave plate, which is used to convert the first linearly polarized light into a circularly polarized light, which can solve the color shift of a large viewing angle. The light passes through the first lens 22 to enlarge the virtual image emitted by the display 12'. The second phase retardation plate 18 is arranged relative to the first phase retardation plate 16 and is also a 1/4 wave plate for converting the circularly polarized light into a second linearly polarized light. The linear polarizer 20 filters out stray light in the second linearly polarized light. The second linearly polarized light filtered out of stray light passes through the second lens 12 to adjust the aberration or focal length of the optical polarization system 14 , and then enters the human eye 26 .

FIG. 3 is a schematic diagram of a third embodiment of the optical system 10 of the present invention. The optical system 10 disclosed in the third embodiment includes a display 12 and an optical polarization system 14 which are disposed opposite to each other. The display 12 is used as a light source for emitting a first linearly polarized light to the optical polarization system 14 , and then the optical polarization system 14 enters the human eye 26 . In the third embodiment, the display 12 includes a display screen 122 and a linear polarization unit 124 . In this embodiment, the light emitted by the display screen 122 does not limit the polarization direction. When the display screen 122 emits light, the light will become linearly polarized light after passing through the linear polarization unit 124 , and the first linearly polarized light is emitted to the optical polarization system 14 . The optical polarization system 14 includes a first phase retardation plate 16 , a first lens 22 , a second phase retardation plate 18 , a linear polarizer 20 and a second lens 24 in sequence. The first phase retardation plate 16 is disposed opposite to the linear polarization unit 124 . In other words, the linear polarization unit 124 is located between the display screen 122 and the first phase retardation plate 16 . The first phase retardation plate 16 is a phase retardation plate retarding 1/4 wavelength, that is, a 1/4 wave plate, which is used to convert the first linearly polarized light into a circularly polarized light, which can solve the color shift of a large viewing angle. The light passes through the first lens 22 to magnify the virtual image emitted by the display 12 . The second phase retardation plate 18 is arranged relative to the first phase retardation plate 16 and is also a 1/4 wave plate for converting the circularly polarized light into a second linearly polarized light. The linear polarizer 20 filters out stray light in the second linearly polarized light. The second linearly polarized light filtered out of stray light passes through the second lens 12 to adjust the aberration or focal length of the optical polarization system 14 , and then enters the human eye 26 . In particular, the second phase retardation plate 18 and the linear polarizer 20 in the present invention can be attached to the first lens 22 or the second lens 24 respectively, for example, a phase retardation film is attached to the first lens 22 in the form of coating , or a linear polarizing film is attached to the second lens 24 in the form of coating. This mode can produce various combinations including the second phase retarder 18 attached to the first lens 22 or the second lens 24 and the linear polarizer 20 attached to the second lens 24 . In addition, the second phase retardation plate 18 and the linear polarizer 20 may be attached to each other and then attached to the first lens 22 or the second lens 24 . In the third embodiment shown in FIG. 3 , the second phase retardation plate 18 and the linear polarizer 20 are attached to each other, but not attached to any lens.

FIG. 4 is a schematic diagram of a fourth embodiment of the optical system 10 of the present invention, which slightly changes the structure of the display 12 in the third embodiment, but the effect produced remains unchanged. The optical system 10 disclosed in the fourth embodiment includes a display 12' and an optical polarization system 14, which are disposed opposite to each other. The display 12' is used as a light source to emit a first linearly polarized light to the optical polarization system 14, and then the optical polarization system 14 is incident on the human eye 26. In the fourth embodiment, the display 12' includes a display screen 122, a phase delay unit 123 and a linear polarization unit 124. In this embodiment, the light emitted by the display screen 122 does not limit the polarization direction. When the display screen 122 emits light, the light will become linearly polarized light after passing through the phase delay unit 123 and the linear polarization unit 124 , and the first linearly polarized light is emitted to the optical polarization system 14 . The optical polarization system 14 includes a first phase retardation plate 16 , a first lens 22 , a second phase retardation plate 18 , a linear polarizer 20 and a second lens 24 in sequence. The first phase retardation plate 16 is disposed opposite to the linear polarization unit 124 . In other words, the linear polarization unit 124 is located between the display screen 122 and the first phase retardation plate 16 . The first phase retardation plate 16 is a phase retardation plate retarding 1/4 wavelength, that is, a 1/4 wave plate, which is used to convert the first linearly polarized light into a circularly polarized light, which can solve the color shift of a large viewing angle. The light passes through the first lens 22 to enlarge the virtual image emitted by the display 12'. The second phase retardation plate 18 is arranged relative to the first phase retardation plate 16 and is also a 1/4 wave plate for converting the circularly polarized light into a second linearly polarized light. The linear polarizer 20 filters out stray light in the second linearly polarized light. The second linearly polarized light filtered out of stray light passes through the second lens 12 to adjust the aberration or focal length of the optical polarization system 14 , and then enters the human eye 26 . In particular, the second phase retardation plate 18 and the linear polarizer 20 in the present invention can be attached to the first lens 22 or the second lens 24 respectively, for example, a phase retardation film is attached to the first lens 22 in the form of coating , or a linear polarizing film is attached to the second lens 24 in the form of coating. This mode can produce various combinations including the second phase retarder 18 attached to the first lens 22 or the second lens 24 and the linear polarizer 20 attached to the second lens 24 . In addition, the second phase retardation plate 18 and the linear polarizer 20 may be attached to each other and then attached to the first lens 22 or the second lens 24 . In the fourth embodiment shown in FIG. 4 , the second phase retardation plate 18 and the linear polarizer 20 are attached to each other, but not attached to any lens.

FIG. 5 is a schematic diagram of a fifth embodiment of the optical system 10 of the present invention. The optical system 10 disclosed in the fifth embodiment includes a display 12 and an optical polarization system 14 which are disposed opposite to each other. The display 12 is used as a light source for emitting a first linearly polarized light to the optical polarization system 14 , and then the optical polarization system 14 enters the human eye 26 . In the fifth embodiment, the display 12 includes a display screen 122 and a linear polarization unit 124 . In this embodiment, the light emitted by the display screen 122 does not limit the polarization direction. When the display screen 122 emits light, the light will become linearly polarized light after passing through the linear polarization unit 124 , and the first linearly polarized light is emitted to the optical polarization system 14 . The optical polarization system 14 includes a first phase retardation plate 16 , a first lens 22 , a second phase retardation plate 18 , a second lens 24 and a linear polarizer 20 in sequence. The first phase retardation plate 16 is disposed opposite to the linear polarization unit 124 . In other words, the linear polarization unit 124 is located between the display screen 122 and the first phase retardation plate 16 . The first phase retardation plate 16 is a phase retardation plate retarding 1/4 wavelength, that is, a 1/4 wave plate, which is used to convert the first linearly polarized light into a circularly polarized light, which can solve the color shift of a large viewing angle. The light passes through the first lens 22 to magnify the virtual image emitted by the display 12 . The second phase retardation plate 18 is disposed relative to the first phase retardation plate 16 and is also a 1/4 wave plate for converting the circularly polarized light into a second linearly polarized light. The second linearly polarized light passes through the second lens 12 to adjust the aberration or focal length of the optical polarization system 14 , and finally uses the linear polarizer 20 to filter the stray light in the second linearly polarized light, and then enters the human eye 26 .

FIG. 6 is a schematic diagram of a sixth embodiment of the optical system 10 of the present invention, which slightly changes the structure of the display 12 in the fifth embodiment, but the effect produced remains unchanged. The optical system 10 disclosed in the sixth embodiment includes a display 12' and an optical polarization system 14, which are disposed opposite to each other. The display 12' is used as a light source to emit a first linearly polarized light to the optical polarization system 14, and then the optical polarization system 14 is incident on the human eye 26. In the sixth embodiment, the display 12' includes a display screen 122, a phase delay unit 123 and a linear polarization unit 124. In this embodiment, the light emitted by the display screen 122 does not limit the polarization direction. When the display screen 122 emits light, the light will become linearly polarized light after passing through the phase delay unit 123 and the linear polarization unit 124 , and the first linearly polarized light is emitted to the optical polarization system 14 . The optical polarization system 14 includes a first phase retardation plate 16 , a first lens 22 , a second phase retardation plate 18 , a second lens 24 and a linear polarizer 20 in sequence. The first phase retardation plate 16 is disposed opposite to the linear polarization unit 124 . In other words, the linear polarization unit 124 is located between the display screen 122 and the first phase retardation plate 16 . The first phase retardation plate 16 is a phase retardation plate that retards 1/4 wavelength, that is, a 1/4 wave plate, which is used to convert the first linearly polarized light into a circularly polarized light, and the circularly polarized light passes through the first lens 22 to convert the display to the display. The virtual image emitted by 12' is enlarged. The second phase retardation plate 18 is disposed relative to the first phase retardation plate 16 and is also a 1/4 wave plate for converting the circularly polarized light into a second linearly polarized light. The second linearly polarized light passes through the second lens 12 to adjust the aberration or focal length of the optical polarization system 14 , and finally uses the linear polarizer 20 to filter the stray light in the second linearly polarized light, and then enters the human eye 26 .

In a specific embodiment of the present invention, it is assumed that the display 12 is used as a light source to emit light, which is 45 degree linearly polarized light when passing through the linear polarizing unit 124, left-handed circularly polarized light after passing through the first phase retarder 16, and then passes through the second After the phase retardation plate 18, the light is linearly polarized at 45 degrees. The linear polarizer 20 and the display 12 are also polarized at 45 degrees, so the second linearly polarized light that finally passes through the linear polarizer 20 is parallel to the polarization direction of the first linearly polarized light emitted by the display 12 .

Therefore, with the optical system for improving the light utilization rate of virtual reality and augmented reality provided by the present invention, using the structure of two phase retarders and one linear polarizer, not only can the linearly polarized light finally pass through the linear polarizer be enabled It is parallel to the polarization direction of the linearly polarized light emitted by the display, and can achieve nearly 100% light utilization rate because there is no energy consumption caused by light reflection. The optical system of the present invention has a simple structure and can be applied to naked eye 3D glasses, a new type of Fresnel lens, or a non-reflection and refraction optical system.

Only the above descriptions are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Therefore, all equivalent changes or modifications made according to the features and spirits described in the scope of the application of the present invention shall be included in the scope of the application for patent of the present invention.

10: Optical system 12, 12': Display 122: Display 123: Phase delay unit 124: Linear polarization unit 14: Optical Polarization System 16: The first phase retarder 18: Second phase retarder 20: Linear polarizer 22: The first lens 24: Second lens 26: Human Eye

FIG. 1 is a schematic diagram of a first embodiment of the optical system of the present invention. FIG. 2 is a schematic diagram of a second embodiment of the optical system of the present invention, which is different from the first embodiment in that the structure of the display is different. FIG. 3 is a schematic diagram of a third embodiment of the optical system of the present invention. FIG. 4 is a schematic diagram of a fourth embodiment of the optical system of the present invention, which differs from the third embodiment in that the structure of the display is different. FIG. 5 is a schematic diagram of a fifth embodiment of the optical system of the present invention. FIG. 6 is a schematic diagram of a sixth embodiment of the optical system of the present invention, which is different from the fifth embodiment in that the structure of the display is different.

10: Optical system

12: Display

122: Display

124: Linear polarization unit

14: Optical Polarization System

16: The first phase retarder

18: Second phase retarder

20: Linear polarizer

22: The first lens

24: Second lens

26: Human Eye

Claims (15)

An optical system, comprising: a display that emits a first linearly polarized light; and an optical polarizing system, which is arranged relative to the display to receive the first linearly polarized light, the optical polarizing system comprising: a first phase retarder, The first linearly polarized light is converted into a circularly polarized light; a second phase retardation plate is arranged relative to the first phase retardation plate to convert the circularly polarized light into a second linearly polarized light; a linear polarizer is opposite to the second phase retardation A retardation plate is arranged to filter out the stray light in the second linearly polarized light and then enter into one's eyes; and a first lens is arranged between the first phase retardation plate and the second phase retardation plate to amplify the A virtual image of one of the displays. The optical system of claim 1, wherein the second phase retardation plate is attached to the first lens. The optical system according to claim 1, wherein the second phase retardation plate and the linear polarizer are attached to each other and then attached to the first lens. The optical system of claim 1, wherein the first lens is a Fresnel lens or a meniscus lens group. The optical system according to claim 1, wherein the optical polarization system further comprises a second lens, which is arranged between the linear polarizer and the human eye, or between the second phase retardation plate and the linear polarizer , used to adjust the aberration or focal length of the optical polarization system. The optical system of claim 5, wherein the second phase retardation plate is attached to the second lens. The optical system of claim 5, wherein the linear polarizer is attached to the second lens. The optical system according to claim 5, wherein the second phase retardation plate and the linear polarizer are attached to each other and then attached to the second lens. The optical system of claim 5, wherein the second lens is a single concave lens or a single convex lens. The optical system of claim 1, wherein the fast axis of the first phase retardation plate and the fast axis of the second phase retardation plate are perpendicular to each other. The optical system of claim 1, wherein the light emitted by the linear polarizer is parallel to the polarization direction of the first linearly polarized light emitted by the display. The optical system of claim 1, wherein the display comprises a display screen and a linear polarization unit, the linear polarization unit is located between the display screen and the first phase retarder, and the light emitted by the display screen passes through the linear polarization After the unit, the first linearly polarized light is emitted. The optical system of claim 1, wherein the display comprises a display screen, a phase delay unit and a linear polarization unit, the phase delay unit is located between the display screen and the linear polarization unit, and the linear polarization unit is located in the phase Between the retardation unit and the first phase retardation plate, the light emitted by the display screen passes through the phase retardation unit and the linear polarization unit, and then emits the first linearly polarized light. The optical system according to claim 12 or 13, wherein the included angle between the fast axis or the slow axis of the first phase retarder and the linear polarization direction of the linear polarization unit is 45 degrees. The optical system of claim 1, wherein the first phase retarder and the second phase retarder are phase retarders retarded by 1/4 wavelength.

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