CN112255789B - Virtual reality display optical system and virtual reality equipment - Google Patents
Virtual reality display optical system and virtual reality equipment Download PDFInfo
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- CN112255789B CN112255789B CN202011128913.3A CN202011128913A CN112255789B CN 112255789 B CN112255789 B CN 112255789B CN 202011128913 A CN202011128913 A CN 202011128913A CN 112255789 B CN112255789 B CN 112255789B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/0101—Head-up displays characterised by optical features
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
- G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
- G02B30/34—Stereoscopes providing a stereoscopic pair of separated images corresponding to parallactically displaced views of the same object, e.g. 3D slide viewers
- G02B30/35—Stereoscopes providing a stereoscopic pair of separated images corresponding to parallactically displaced views of the same object, e.g. 3D slide viewers using reflective optical elements in the optical path between the images and the observer
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
- G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
- G02B30/34—Stereoscopes providing a stereoscopic pair of separated images corresponding to parallactically displaced views of the same object, e.g. 3D slide viewers
- G02B30/36—Stereoscopes providing a stereoscopic pair of separated images corresponding to parallactically displaced views of the same object, e.g. 3D slide viewers using refractive optical elements, e.g. prisms, in the optical path between the images and the observer
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/0101—Head-up displays characterised by optical features
- G02B2027/0132—Head-up displays characterised by optical features comprising binocular systems
- G02B2027/0134—Head-up displays characterised by optical features comprising binocular systems of stereoscopic type
Abstract
The application provides a virtual reality display optical system and virtual reality equipment, relates to the display device field. Virtual reality display optical system includes: the first light path module, the symmetrical multi-waist prism and the second light path module are arranged in parallel; the first light path module comprises a first display component, a first lens and a first three-sided prism which are sequentially arranged along a first direction; the second light path module comprises a second display component, a second lens and a second three-sided prism which are sequentially arranged along the first direction; part of light rays emitted by the first display component irradiate on the symmetrical multi-waist prism, are transmitted to the second three-sided prism and are emitted from the second three-sided prism along the first direction; and part of light rays emitted by the second display component are irradiated on the symmetrical multi-waist prism and finally emitted out from the first three-sided prism along the first direction after transmission. The virtual reality display optical system can display two pictures with different focal depths in front of each eye to form a light field 3D effect, and the problem of convergence conflict is solved.
Description
Technical Field
The application relates to the field of display equipment, in particular to a virtual reality display optical system and virtual reality equipment.
Background
VR, Virtual Reality technology (abbreviated as VR), also known as smart environment technology, is a computer simulation system that can create and experience a Virtual world, and uses a computer to generate a simulated environment to immerse a user in the environment. The virtual reality technology is to combine electronic signals generated by computer technology with data in real life to convert the electronic signals into phenomena which can be felt by people, wherein the phenomena can be true and true objects in reality or substances which can not be seen by the naked eyes, and the phenomena are expressed by a three-dimensional model. These phenomena are called virtual reality because they are not directly visible but a real world simulated by computer technology.
At present, the VR device uses an optical system with a single eye corresponding to a single display module, and at the same time, the human eye can only receive information on one virtual image plane. In order to form a 3D effect, a binocular parallax mode is generally adopted, that is, two pictures with a certain parallax are presented to two eyes, and a visual effect with a 3D feeling is formed through human brain processing.
Therefore, further solution to the above technical problems is needed.
Disclosure of Invention
The invention mainly aims to provide a virtual reality display optical system and a virtual reality device, which can solve the technical problem that convergence conflict is easily caused when 3D display is carried out.
In order to solve the above technical problem, an embodiment of the present application provides the following technical solutions:
in one aspect the application provides a virtual reality display optical system, comprising: the first light path module, the symmetrical multi-waist prism and the second light path module are arranged in parallel;
the first light path module comprises a first display part, a first lens and a first three-sided prism which are sequentially arranged along a first direction, and light rays emitted by the first display part are emitted out through the first three-sided prism sequentially by the first lens and are used for being watched by human eyes and forming a first virtual image surface;
the second light path module comprises a second display component, a second lens and a second three-sided prism which are sequentially arranged along the first direction, and light rays emitted by the second display component are emitted out through the second lens and the second three-sided prism in sequence and are used for being watched by human eyes and forming a second virtual image surface;
part of light rays emitted by the first display component irradiate on the symmetrical multi-waist prism, are transmitted by the symmetrical multi-waist prism to enter the second three-sided prism, and are emitted by the second three-sided prism along the first direction to be watched by human eyes and form a third virtual image surface; part of light rays emitted by the second display component irradiate the symmetrical multi-waist prism, are transmitted by the symmetrical multi-waist prism to enter the first three-surface prism, are emitted by the first three-surface prism along the first direction, are used for being watched by human eyes and form a fourth virtual image surface;
the first virtual image surface and the third virtual image surface are the same from the virtual image distance of the watching position, the second virtual image surface and the fourth virtual image surface are the same from the virtual image distance of the watching position, the first virtual image surface and the second virtual image surface have the image distance of the preset distance, so that one eye of a user can watch the first virtual image surface and the fourth virtual image surface simultaneously to form a 3D image, and the other eye can watch the second virtual image surface and the third virtual image surface simultaneously to form a 3D image.
The object of the present invention and the technical problems solved thereby can be further achieved by the following technical measures.
Optionally, in the virtual reality display optical system, the first optical path module and the second optical path module are symmetrically arranged with respect to a symmetry axis of the symmetric multi-waist prism as a symmetry line;
wherein the symmetry axis of the symmetric multi-waisted prism is parallel to the first direction.
Optionally, in the virtual reality display optical system, an included angle between a display light emitting surface of the first display component and the first direction is 45 to 90 degrees;
and the display smooth surface of the second display part forms an included angle of 45-90 degrees with the first direction.
Optionally, in the virtual reality display optical system, the symmetric multi-waist prism includes a first side corresponding to the first light path module and a second side corresponding to the second light path module, respectively, the first side of the symmetric multi-waist prism is provided with a first waist surface and a second waist surface along the first direction, and the second side of the symmetric multi-waist prism is provided with a third waist surface and a fourth waist surface along the first direction;
the light emitted by the first display component is incident from the first waist surface, reflected by the bottom surface of the symmetrical multi-waist prism in the first direction, emitted from the fourth waist surface and incident into the second three-sided prism, and the light emitted by the second display component is incident from the third waist surface, reflected by the bottom surface, emitted from the second waist surface and incident into the first three-sided prism;
wherein, first waist with third waist symmetry and all with the first direction becomes the first contained angle of predetermineeing, the second waist with fourth waist symmetry and all with the first direction becomes the second and predetermines the contained angle, first predetermineeing the contained angle and be less than the second is predetermine the contained angle.
Optionally, in the virtual reality display optical system, the second waist surface corresponds to a curved surface of the first three-sided prism, and the fourth waist surface corresponds to a curved surface of the second three-sided prism.
Optionally, in the virtual reality display optical system, an angle of the first preset included angle is 30 to 70 degrees;
the angle of the second preset included angle is 35-75 degrees.
Optionally, in the virtual reality display optical system, the bottom surface of the symmetric multi-waist prism in the first direction is a total reflection surface.
Optionally, in the virtual reality display optical system, after the light emitted by the first display component enters the symmetric multi-girdle prism, an incident angle of the incident light formed on the bottom surface is greater than arcsin (1/n)0) After the light rays emitted by the second display component enter the symmetrical multi-waist prism, the incident angle of the incident light rays formed on the bottom surface is larger than arcsin (1/n)0)；
Wherein, said n0Is the refractive index of the symmetric multi-waisted prism.
Optionally, in the virtual reality display optical system, a virtual image distance between the first virtual image plane and the third virtual image plane from a viewing position is greater than or equal to 0.5 m;
the virtual image distance between the second virtual image surface and the fourth virtual image surface and the viewing position is more than or equal to 0.5 m;
the image distance of the preset distance between the first virtual image surface and the second virtual image surface is 0.5 m.
Optionally, in the virtual reality display optical system, both side surfaces of the first lens are refractive spherical surfaces, aspheric surfaces, or free-form surfaces;
and the surfaces of the two sides of the second lens are both refraction spherical surfaces, aspheric surfaces or free-form surfaces.
Optionally, in the virtual reality display optical system, three surfaces of the first three-sided prism are all refractive free-form surfaces;
and three surfaces of the second three-surface prism are refraction free-form surfaces.
In another aspect, the present application provides a virtual reality device, comprising:
a virtual reality display optical system;
the virtual reality display optical system includes:
the first light path module, the symmetrical multi-waist prism and the second light path module are arranged in parallel;
the first light path module comprises a first display part, a first lens and a first three-sided prism which are sequentially arranged along a first direction, and light rays emitted by the first display part are emitted out through the first three-sided prism sequentially by the first lens and are used for being watched by human eyes and forming a first virtual image surface;
the second light path module comprises a second display component, a second lens and a second three-sided prism which are sequentially arranged along the first direction, and light rays emitted by the second display component are emitted out through the second lens and the second three-sided prism in sequence and are used for being watched by human eyes and forming a second virtual image surface;
part of light rays emitted by the first display component irradiate on the symmetrical multi-waist prism, are transmitted by the symmetrical multi-waist prism to enter the second three-sided prism, and are emitted by the second three-sided prism along the first direction to be watched by human eyes and form a third virtual image surface; part of light rays emitted by the second display component irradiate the symmetrical multi-waist prism, are transmitted by the symmetrical multi-waist prism to enter the first three-surface prism, are emitted by the first three-surface prism along the first direction, are used for being watched by human eyes and form a fourth virtual image surface;
the first virtual image surface and the third virtual image surface are the same from the virtual image distance of the watching position, the second virtual image surface and the fourth virtual image surface are the same from the virtual image distance of the watching position, the first virtual image surface and the second virtual image surface have the image distance of the preset distance, so that one eye of a user can watch the first virtual image surface and the fourth virtual image surface simultaneously to form a 3D image, and the other eye can watch the second virtual image surface and the third virtual image surface simultaneously to form a 3D image.
By the technical scheme, the virtual reality display optical system and the virtual reality equipment at least have the following advantages:
the virtual reality display optical system provided by the embodiment of the invention is provided with two light path modules, and each light path module consists of one display component and two optical lenses, so that the two display components can respectively display information to be displayed on two eyes of a user; the many waist prisms of symmetry have been set up to the deuterogamy, can be with the information refraction of first display element demonstration to the second light path module in, and present for the user through second trihedral prism, and refract the information that the second display element shows to the first light path module in, and present for the user through first trihedral prism, user's every eyes all can see two display element's display information like this, and the picture of two demonstration is in two burnt depths, can form light field 3D effect respectively, namely user's two eyes homoenergetic enough see 3D's display screen. The two eyes of the user can see the 3D display picture through the adjustment of the light path and the superposition of the virtual image picture, the two eyes can see the same 3D picture, and the two pictures with parallax are not processed by the human brain to form the 3D picture as in the prior art, so that the problem of convergence conflict is effectively solved, and the user can feel more comfortable when watching the 3D image.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
The above and other objects, features and advantages of exemplary embodiments of the present application will become readily apparent from the following detailed description read in conjunction with the accompanying drawings. Several embodiments of the present application are illustrated by way of example and not by way of limitation in the figures of the accompanying drawings and in which like reference numerals refer to similar or corresponding parts and in which:
fig. 1 schematically shows a schematic configuration of a virtual reality display optical system;
FIG. 2 schematically illustrates an optical path diagram of a first optical path module of a virtual reality display optical system;
fig. 3 schematically shows an optical path diagram of a second optical path module of a virtual reality display optical system.
The reference numerals in fig. 1-3 are:
the image processing device comprises a first optical path module 1, a first display component 11, a first lens 12, a first three-sided prism 13, a symmetrical multi-waist prism 2, a second optical path module 3, a second display component 31, a second lens 32, a second three-sided prism 33, a first virtual image plane 4, a second virtual image plane 5, a third virtual image plane 6, a fourth virtual image plane 7, a first waist plane S01, a second waist plane S02, a third waist plane S03 and a fourth waist plane S04.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which this application belongs.
Example one
As shown in fig. 1 to fig. 3, a virtual reality display optical system according to an embodiment of the present invention includes: the device comprises a first light path module 1, a symmetrical multi-waist prism 2 and a second light path module 3 which are arranged in parallel;
the first light path module 1 comprises a first display part 11, a first lens 12 and a first three-sided prism 13 which are sequentially arranged along a first direction, and light rays emitted by the first display part 11 sequentially pass through the first lens 12 and the first three-sided prism 13 to be emitted out for human eyes to watch and form a first virtual image surface 4;
the second optical path module 3 includes a second display component 31, a second lens 32 and a second three-sided prism 33, which are sequentially arranged along the first direction, and light emitted by the second display component 31 sequentially passes through the second lens 32 and the second three-sided prism 33 to be emitted, so that the light is viewed by human eyes and forms a second virtual image surface 5;
part of light rays emitted by the first display component 11 irradiate on the symmetrical multi-waist prism 2, are transmitted by the symmetrical multi-waist prism 2 to be incident on the second three-sided prism 33, are emitted from the second three-sided prism 33 along the first direction, are used for being watched by human eyes and form a third virtual image surface 6; part of light rays emitted by the second display component 31 irradiate on the symmetrical multi-waist prism 2, are transmitted by the symmetrical multi-waist prism 2 to be incident on the first three-sided prism 13, are emitted from the first three-sided prism 13 along the first direction, are used for being watched by human eyes, and form a fourth virtual image surface 7;
wherein, first virtual image plane 4 with third virtual image plane 6 is the same from the virtual image distance D1 of viewing position, second virtual image plane 5 with fourth virtual image plane 7 is the same from the virtual image distance D2 of viewing position, first virtual image plane 4 with second virtual image plane 5 has the image distance of predetermineeing the distance, makes a user's eyes watch simultaneously first virtual image plane 4 with fourth virtual image plane 7 is in order to form the 3D image, and another eyes watch simultaneously second virtual image plane 5 with third virtual image plane 6 is in order to form the 3D image.
Specifically, the first direction, i.e. the light emitting direction of the first display component 11 and the second display component 31, may also be the direction in which the user's eyes receive the displayed image information, so the first optical path module 1 and the second optical path module 3 are arranged in parallel, i.e. the optical paths from the two display components to the user are parallel, and the parallel direction of the two display components is perpendicular to the first direction, and the symmetric multi-waist prism 2 is located between the first optical path module 1 and the second optical path module 3.
The first display component 11 in the first optical path module 1 may be any component capable of displaying image information, such as a Liquid Crystal Display (LCD), an Organic Light Emitting Display (OLED), a light emitting diode display (LED), etc., the first lens 12 is a lens for converging light emitted by the first display component 11 and irradiating the light onto the first three-sided prism 13, the first three-sided prism 13 has three refracting surfaces, and is capable of refracting and finally emitting the received light along a first direction, so that the user's eyes facing the first three-sided prism 13 in the first direction receive the light of the display image, and thus the user can obtain the first virtual image surface 4 extending along the light direction by processing the received light through the human brain, that is, the image displayed to the user by the first display component 11. Similarly, the second optical path module 3 has the same structure as the first optical path module 1, and the working principle is the same as the first optical path module 1, which is not described herein again, and the second optical path module 3 can display the second virtual image plane 5 for the eyes of the user.
The symmetrical multi-waist prism 2 is a prism with a plurality of waist surfaces (i.e. refraction surfaces) arranged on two opposite sides, the two opposite sides of the prism respectively correspond to the first light path module 1 and the second light path module 3, so that light of the first display component 11 in the first light path module 1 is refracted to the second light path module 3 through the prism, the light is presented to eyes of a user through the second three-face prism 33, the light of the second display component 31 in the second light path module 3 is refracted to the first light path module 1 through the prism, and the light is presented to the eyes of the user through the first three-face prism 13. And then the display information of the display components in the two optical path modules can be presented to one eye of a user at the same time.
The virtual image distance is the distance from the virtual image surface determined by the light reverse extension line to the eyes after the user eyes obtain the image light of the three-sided prism, namely the distance from the virtual image surface to the viewing position. In order to enable each eye of the user to see the 3D effect image, the first display component 11 and the second display component 31 may display the same or different pictures, or pictures at different positions of the 3D object to be displayed, and by setting the optical paths of the first optical path module 1 and the second optical path module 3, the virtual image distances of the first virtual image plane 4 presented to the user by the first display component 11 and the second virtual image plane 5 presented to the user by the second display component 31 are different, while the third virtual image plane 6 obtained by refraction is the same as the picture of the first virtual image plane 4 and the virtual image distance is the same, and the fourth virtual image plane 7 is the same as the picture of the second virtual image plane 5 and the virtual image distance is the same. Therefore, the first virtual image surface 4 and the fourth virtual image surface 7 can be superposed to form a 3D display effect, the second virtual image surface 5 and the third virtual image surface 6 can also be superposed to form the 3D display effect, and thus, two eyes of a user can see the same 3D picture.
The virtual reality display optical system provided by the embodiment of the invention is provided with two light path modules, each light path module consists of one display component and two optical lenses, so that the two display components can respectively display information to be displayed on two eyes of a user, because the light path of the two light path modules is different, after light rays from different sources reach pupils, virtual image surfaces determined by reverse extension lines of the light path modules are different, namely the first virtual image surface 4 and the second virtual image surface 5 can be different, and the virtual image distances between the first virtual image surface and the second virtual image surface can also be different; the many waists of symmetry prism 2 that has set up again the complex, can refract the information that first display element 11 shows to in second light path module 3, and present for the user through second three-sided prism 33, and refract the information that second display element 31 shows to in first light path module 1, and present for the user through first three-sided prism 13, every eyes of user can see the display information of two display elements like this, and the picture of two demonstration is in two focal depths, can form the light field 3D effect respectively, namely, two eyes of user can all see 3D's display picture. The two eyes of the user can see the 3D display picture through the adjustment of the light path and the superposition of the virtual image picture, the two eyes can see the same 3D picture, and the two pictures with parallax are not processed by the human brain to form the 3D picture as in the prior art, so that the problem of convergence conflict is effectively solved, and the user can feel more comfortable when watching the 3D image.
In a specific implementation, the first optical path module 1 and the second optical path module 3 are symmetrically arranged with respect to a symmetry axis of the symmetric multi-waist prism 2 as a symmetry line; wherein the symmetry axis of the symmetric multi-waisted prism 2 is parallel to the first direction.
Specifically, the symmetrical multi-waist prism 2 has two symmetrical sides, one side corresponds to the first optical path module 1, and the other side corresponds to the second optical path module 3, so that the symmetrical multi-waist prism 2 has a symmetrical line located at the middle, and the symmetrical line is along the first direction. In order to ensure that the image refracted by the symmetrical multi-waist prism 2 and displayed by the two three-sided prisms can be stacked with the first virtual image plane 4 and the second virtual image plane 5 respectively, it is necessary to ensure that the symmetrical multi-waist prism 2 is located in the middle of the first optical path module 1 and the second optical path module 3.
In the specific implementation, since the first optical path module 1 and the second optical path module 3 are symmetrically arranged, the arrangement positions and the arrangement modes of the components in each optical path module are the same or symmetrical; the first display part 11 may be directly opposite to the first lens 12, that is, the display surface of the first display part 11 may be 90 degrees to the first direction, the angle of the first display part 11 corresponding to the first lens 12 may also be appropriately adjusted, and similarly, the second display part 31 and the second lens 32 may also be directly opposite to each other or have a certain included angle. For convenience of description, an included angle between the first direction and the display light emitting surface is expressed, that is, an included angle between the display light emitting surface of the first display part 11 and the first direction is 45 to 90 degrees; the display light surface of the second display part 31 forms an included angle of 45-90 degrees with the first direction; note that, when the two display members are not perpendicular to the first direction, the display light surfaces of the two display members need to face the symmetric multi-waisted prism 2 and be set at the above-described inclination angle.
In a specific implementation, the symmetric multi-waist prism 2 includes a first side corresponding to the first optical path module 1 and a second side corresponding to the second optical path module 3, respectively, the first side of the symmetric multi-waist prism 2 is provided with a first waist surface S01 and a second waist surface S02 along the first direction, and the second side of the symmetric multi-waist prism 2 is provided with a third waist surface S03 and a fourth waist surface S04 along the first direction;
light emitted by the first display part 11 is incident from the first waist surface S01, reflected by the bottom surface S05 of the symmetric multi-waist prism 2 in the first direction, then emitted through the fourth waist surface S04 and incident on the second three-sided prism 33, and light emitted by the second display part 31 is incident from the third waist surface S03, reflected by the bottom surface S05, then emitted through the second waist surface S02 and incident on the first three-sided prism 13;
wherein, first waist S01 with third waist S03 symmetry and all with the first direction becomes first predetermined contained angle, second waist S02 with fourth waist S04 symmetry and all with the first direction becomes the second predetermined contained angle, first predetermined contained angle is less than the second predetermined contained angle.
Specifically, the first waist surface S01, the second waist surface S02, the third waist surface S03, and the fourth waist surface S04 may be planes, or curved surfaces with a certain focal power, such as spherical surfaces, aspheric surfaces, free-form surfaces, and the like, and specifically, parameters of the curved surfaces may be obtained by optical simulation software (zemax, codev, and the like) and setting appropriate boundary conditions under the condition that the light path transmits light, which is not described in detail in the embodiment of the present invention. The symmetrical multi-waisted prism 2 goes out of the opposite sides, and the sides except the opposite sides can be set to be flat surfaces so as to simplify the processing of the symmetrical multi-waisted prism 2.
Wherein, the first preset included angle is required to satisfy that after part of the light rays emitted by the first display part 11 and the second display part 31 can irradiate the first waist surface S01 and the third waist surface S03, the light rays enter the symmetrical multi-waist prism 2 in a transmission or refraction mode; the second preset included angle enables the light entering the symmetrical multi-waist prism 2 to be emitted through the second waist surface S02 or the fourth waist surface S04 and to irradiate on the two three-sided prisms.
Further, wherein the second waist surface S02 corresponds to one curved surface of the first facet prism 13, and the fourth waist surface S04 corresponds to one curved surface of the second facet prism 33; the angle of the first preset included angle is 30-70 degrees; the angle of the second preset included angle is 35-75 degrees.
Specifically, the first preset included angle and the second preset included angle may be obtained by using optical simulation software (zemax, codev, etc.) and setting a suitable boundary condition under the condition that the light transmission is satisfied, which is not described in detail in the embodiment of the present invention.
In a specific implementation, the bottom surface S05 of the symmetric multi-waisted prism 2 in the first direction is a total reflection surface.
Specifically, the total reflection may be formed by disposing a reflective coating on the bottom surface S05, for example, by plating a metal ion reflective film or a film on the outer surface of the bottom surface S05.
In an embodiment, after the light emitted from the first display component 11 enters the symmetric multi-waisted prism 2, the incident angle of the incident light formed on the bottom surface is greater than arcsin (1/n)0) After the light emitted from the second display member 31 enters the symmetric multi-waist prism 2, the incident angle of the incident light formed on the bottom surface is larger than arcsin (1/n)0) (ii) a Wherein, said n0Is the refractive index of the symmetric multi-waisted prism 2.
Specifically, in order to ensure that the light rays of the two display members can be incident into the symmetric multi-waisted prism 2, the light emission angles of the two display members need to be set within the range of 0 to 60 degrees, while in order to enable the light rays entering the symmetric multi-waisted prism 2 to be incidentAs much as possible of the light emitted from the second waist surface or the fourth waist surface to be incident on the first three-sided prism 13 or the second three-sided prism 33, it is preferable that the incident angle of the incident light formed by the light incident on the symmetrical multi-waist prism 2 on the bottom surface is larger than arcsin (1/n)0). Specifically, how to secure the incident angle of the incident light can be obtained by using optical simulation software (zemax, codev, etc.) and setting the above-mentioned boundary conditions of the lens, the three-sided prism, the symmetric multi-waist prism 2, and the display member, to obtain information such as the surface form and size of the lens, the form and size of each surface of the three-sided prism, and the angle of each waist surface of the symmetric multi-waist prism 2.
In a specific implementation, the virtual image distance D1 between the first virtual image plane 4 and the third virtual image plane 6 and the viewing position is greater than or equal to 0.5m, or other preferable values according to the scene requirements; the virtual image distance D2 between the second virtual image surface 5 and the fourth virtual image surface 7 and the viewing position is greater than or equal to 0.5m, or other preferable values according to the scene requirements; the image distance of the preset distance between the first virtual image plane 4 and the second virtual image plane 5 is 0.5m, that is, the absolute value of the difference between the two is 0.5m, or other preferable values according to the scene requirements.
Specifically, by setting the virtual image distance, the user can see a 3D picture clearly, and the viewing requirements of the user are met.
In a specific implementation, both side surfaces of the first lens 12 are refractive spherical surfaces, aspheric surfaces or free-form surfaces; the surfaces of the two sides of the second lens 32 are refractive spherical surfaces, aspheric surfaces or free-form surfaces; three surfaces of the first three-surface prism 13 are all refraction free-form surfaces; three surfaces of the second three-sided prism 33 are refractive free-form surfaces.
Specifically, the shape parameters of the both side surfaces of the first lens 12, the shape parameters of the both side surfaces of the second lens 32, the shape parameters of the three surfaces of the first three-sided prism 13, and the shape parameters of the three surfaces of the second three-sided prism 33 can be obtained by simulation by setting relevant boundary conditions, such as distance conditions such as a distance between the lens and the prism, light transmission transmittance, refractive index, and the like, by using optical simulation software (zemax, codev, and the like) in a case where the above-described light transmission is satisfied.
In summary, to facilitate understanding of the transmission process of light and the principle of presenting the virtual image plane, as shown in fig. 1 to 3, the embodiment of the present invention provides an optical path illustration:
the light emitted from the first display part 11 is irradiated on the S11 surface of the first lens 12, then is collected by the first lens 12, is emitted from the S12 surface of the first lens 12, is emitted on the S21 surface of the first prism 13, is emitted from the S22 surface of the first prism 13 by refraction of the first prism 13, and presents a picture on one eye of a user, which is presented on the left eye of the user in the schematic diagram, and the user can obtain an imaginary image surface determined by a reverse extension line through human brain processing according to the received light, namely the first imaginary image surface 4; meanwhile, a part of light of the first display part 11 is irradiated on the first waist surface S01 of the symmetric multi-waist prism 2, and further irradiated on the bottom surface S05 of the symmetric multi-waist prism 2, and then irradiated on the fourth waist surface S04 by total reflection of the bottom surface S05, and irradiated on the S43 surface of the second three-sided prism 33 by refraction of the fourth waist surface S04, and finally reflected by the S41 surface of the second three-sided prism 33 and refracted by the S42 surface, so that a picture is displayed in another eye of the user, and the user can obtain an imaginary image surface determined by a reverse extension line, namely, the third imaginary image surface 6, by human brain processing according to the received light. The light rays emitted by the first display part 11, which are described above, are finally presented to the virtual image surfaces of both eyes of the user, which are at the same virtual image distance.
Similarly, the principle that the light emitted from the second display unit 31 presents a virtual image surface is as follows, the light emitted from the second display unit 31 irradiates on the S31 surface of the second lens 32, then is collected by the second lens 32 and emitted from the S32 surface of the second lens 32, and is emitted on the S41 surface of the second three-sided prism 33, and is emitted from the S42 surface of the second three-sided prism 33 by refraction of the second three-sided prism 33, and the image is presented on one eye of the user, and is presented on the right eye of the user in the schematic diagram, and the user can obtain a virtual image surface determined by a reverse extension line through human brain processing according to the received light, namely, the second virtual image surface 5; meanwhile, a part of light of the second display part 31 is irradiated on the third waist surface S03 of the symmetric multi-waist prism 2, and further irradiated on the bottom surface S05 of the symmetric multi-waist prism 2, and then irradiated on the second waist surface S02 by total reflection of the bottom surface S05, and irradiated on the S23 surface of the first three-sided prism 13 by refraction of the second waist surface S02, and finally reflected by the S21 surface of the first three-sided prism 13 and refracted by the S22 surface, so that a picture is displayed in another eye of the user, and the user can obtain an imaginary image surface determined by a reverse extension line, namely, the fourth imaginary image surface 7, by human brain processing according to the received light.
And then through the transmission of the above-mentioned light, make the left eye of user receive first virtual image plane 4 and fourth virtual image plane 7 with certain image distance, make the right eye of user receive second virtual image plane 5 and third virtual image plane 6 with certain image distance, so the user can watch the 3D image that first virtual image plane 4 and fourth virtual image plane 7 formed, and the 3D image that second virtual image plane 5 and third virtual image plane 6 formed, make the image that two eyes watch be the same, and then solve the problem of "convergence conflict" effectively.
The S21 surface of the first three-sided prism 13 and the S41 surface of the second three-sided prism 33 need to have a certain R/T ratio, that is, the reflection/transmittance is N: 1, taking N as 1; in this light propagation path, the light propagating inside the prism is reflected and then propagates downward.
Example two
A virtual reality device provided in the second embodiment of the present invention includes a virtual reality display optical system, as shown in fig. 1 to 3, the virtual reality display optical system includes: the device comprises a first light path module 1, a symmetrical multi-waist prism 2 and a second light path module 3 which are arranged in parallel;
the first light path module 1 comprises a first display part 11, a first lens 12 and a first three-sided prism 13 which are sequentially arranged along a first direction, and light rays emitted by the first display part 11 sequentially pass through the first lens 12 and the first three-sided prism 13 to be emitted out for human eyes to watch and form a first virtual image surface 4;
the second optical path module 3 includes a second display component 31, a second lens 32 and a second three-sided prism 33, which are sequentially arranged along the first direction, and light emitted by the second display component 31 sequentially passes through the second lens 32 and the second three-sided prism 33 to be emitted, so that the light is viewed by human eyes and forms a second virtual image surface 5;
part of light rays emitted by the first display component 11 irradiate on the symmetrical multi-waist prism 2, are transmitted by the symmetrical multi-waist prism 2 to be incident on the second three-sided prism 33, are emitted from the second three-sided prism 33 along the first direction, are used for being watched by human eyes and form a third virtual image surface 6; part of light rays emitted by the second display component 31 irradiate on the symmetrical multi-waist prism 2, are transmitted by the symmetrical multi-waist prism 2 to be incident on the first three-sided prism 13, are emitted from the first three-sided prism 13 along the first direction, are used for being watched by human eyes, and form a fourth virtual image surface 7;
wherein, first virtual image plane 4 with third virtual image plane 6 is the same apart from the virtual image distance of viewing the position, second virtual image plane 5 with fourth virtual image plane 7 is the same apart from the virtual image distance of viewing the position, first virtual image plane 4 with second virtual image plane 5 has the image distance of predetermineeing the distance, makes a user's eyes watch simultaneously first virtual image plane 4 with fourth virtual image plane 7 is in order to form the 3D image, and another eyes watch simultaneously second virtual image plane 5 with third virtual image plane 6 is in order to form the 3D image.
Specifically, the virtual reality display optical system described in the second embodiment may directly use the virtual reality display optical system provided in the first embodiment, and specific implementation structures may refer to relevant contents described in the first embodiment, which is not described herein again.
In the virtual reality device provided by the embodiment of the invention, the virtual reality display optical system used by the virtual reality display optical system is provided with two optical path modules, each optical path module consists of one display component and two optical lenses, so that the two display components can respectively display information to be displayed on two eyes of a user, because the optical path of the two optical path modules is different, after light rays from different sources reach pupils, virtual image surfaces determined by reverse extension lines of the light rays are also different, namely the first virtual image surface 4 and the second virtual image surface 5 can be different, and the virtual image distances between the two virtual image surfaces can also be different; the many waists of symmetry prism 2 that has set up again the complex, can refract the information that first display element 11 shows to in second light path module 3, and present for the user through second three-sided prism 33, and refract the information that second display element 31 shows to in first light path module 1, and present for the user through first three-sided prism 13, every eyes of user can see the display information of two display elements like this, and the picture of two demonstration is in two focal depths, can form the light field 3D effect respectively, namely, two eyes of user can all see 3D's display picture. The two eyes of the user can see the 3D display picture through the adjustment of the light path and the superposition of the virtual image picture, the two eyes can see the same 3D picture, and the two pictures with parallax are not processed by the human brain to form the 3D picture as in the prior art, so that the problem of convergence conflict is effectively solved, and the user can feel more comfortable when watching the 3D image.
It will be appreciated that the relevant features of the devices described above may be referred to one another. In addition, "first", "second", and the like in the above embodiments are for distinguishing the embodiments, and do not represent merits of the embodiments.
In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (12)
1. A virtual reality display optical system, comprising:
the first light path module, the symmetrical multi-waist prism and the second light path module are arranged in parallel;
the first light path module comprises a first display part, a first lens and a first three-sided prism which are sequentially arranged along a first direction, and light rays emitted by the first display part are emitted out through the first three-sided prism sequentially by the first lens and are used for being watched by human eyes and forming a first virtual image surface;
the second light path module comprises a second display component, a second lens and a second three-sided prism which are sequentially arranged along the first direction, and light rays emitted by the second display component are emitted out through the second lens and the second three-sided prism in sequence and are used for being watched by human eyes and forming a second virtual image surface;
part of light rays emitted by the first display component irradiate on the symmetrical multi-waist prism, are transmitted by the symmetrical multi-waist prism to enter the second three-sided prism, and are emitted by the second three-sided prism along the first direction to be watched by human eyes and form a third virtual image surface; part of light rays emitted by the second display component irradiate the symmetrical multi-waist prism, are transmitted by the symmetrical multi-waist prism to enter the first three-surface prism, are emitted by the first three-surface prism along the first direction, are used for being watched by human eyes and form a fourth virtual image surface;
the first virtual image surface and the third virtual image surface are the same from the virtual image distance of the watching position, the second virtual image surface and the fourth virtual image surface are the same from the virtual image distance of the watching position, the first virtual image surface and the second virtual image surface have the image distance of the preset distance, so that one eye of a user can watch the first virtual image surface and the fourth virtual image surface simultaneously to form a 3D image, and the other eye can watch the second virtual image surface and the third virtual image surface simultaneously to form a 3D image.
2. The virtual reality display optical system according to claim 1,
the first light path module and the second light path module are symmetrically arranged with the symmetrical axis of the symmetrical multi-waist prism as a symmetrical line;
wherein the symmetry axis of the symmetric multi-waisted prism is parallel to the first direction.
3. The virtual reality display optical system according to claim 2,
the display light-emitting surface of the first display part forms an included angle of 45-90 degrees with the first direction;
and the display smooth surface of the second display part forms an included angle of 45-90 degrees with the first direction.
4. The virtual reality display optical system according to claim 1,
the symmetrical multi-waist prism comprises a first side and a second side, wherein the first side corresponds to the first light path module and the second side corresponds to the second light path module respectively;
the light emitted by the first display component is incident from the first waist surface, reflected by the bottom surface of the symmetrical multi-waist prism in the first direction, emitted from the fourth waist surface and incident into the second three-sided prism, and the light emitted by the second display component is incident from the third waist surface, reflected by the bottom surface, emitted from the second waist surface and incident into the first three-sided prism;
wherein, first waist with third waist symmetry and all with the first direction becomes the first contained angle of predetermineeing, the second waist with fourth waist symmetry and all with the first direction becomes the second and predetermines the contained angle, first predetermineeing the contained angle and be less than the second is predetermine the contained angle.
5. The virtual reality display optical system according to claim 4,
the second waist surface corresponds to one curved surface of the first three-sided prism, and the fourth waist surface corresponds to one curved surface of the second three-sided prism.
6. The virtual reality display optical system according to claim 4,
the angle of the first preset included angle is 30-70 degrees;
the angle of the second preset included angle is 35-75 degrees.
7. The virtual reality display optical system according to claim 4,
the bottom surface of the symmetrical multi-waist prism in the first direction is a total reflection surface.
8. The virtual reality display optical system according to claim 4,
after the light rays emitted by the first display part enter the symmetrical multi-waist prism, the incident angle of the incident light rays formed on the bottom surface is larger than arcsin (1/n)0) After the light rays emitted by the second display component enter the symmetrical multi-waist prism, the incident angle of the incident light rays formed on the bottom surface is larger than arcsin (1/n)0)；
Wherein, said n0Is the refractive index of the symmetric multi-waisted prism.
9. The virtual reality display optical system according to claim 1,
the virtual image distance between the first virtual image surface and the third virtual image surface and the viewing position is more than or equal to 0.5 m;
the virtual image distance between the second virtual image surface and the fourth virtual image surface and the viewing position is more than or equal to 0.5 m;
the image distance of the preset distance between the first virtual image surface and the second virtual image surface is 0.5 m.
10. The virtual reality display optical system according to claim 1,
the surfaces of the two sides of the first lens are both refraction spherical surfaces, aspheric surfaces or free-form surfaces;
and the surfaces of the two sides of the second lens are both refraction spherical surfaces, aspheric surfaces or free-form surfaces.
11. The virtual reality display optical system according to claim 1,
three surfaces of the first three-surface prism are refraction free-form surfaces;
and three surfaces of the second three-surface prism are refraction free-form surfaces.
12. A virtual reality device, comprising:
the virtual reality display optical system of any one of claims 1-11.
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| JP4819532B2 (en) * | 2006-03-01 | 2011-11-24 | キヤノン株式会社 | Image display device |
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| CN103982818A (en) * | 2014-05-05 | 2014-08-13 | 京东方科技集团股份有限公司 | Naked eye 3D (three dimensional) backlight module, display device and display method |
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