CN106773061A - A kind of nearly eye display optical system - Google Patents
A kind of nearly eye display optical system Download PDFInfo
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- CN106773061A CN106773061A CN201710073951.5A CN201710073951A CN106773061A CN 106773061 A CN106773061 A CN 106773061A CN 201710073951 A CN201710073951 A CN 201710073951A CN 106773061 A CN106773061 A CN 106773061A
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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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Abstract
The invention discloses a kind of nearly eye display optical system, including the lens and the inclined semi-transparent semi-reflecting level crossing being fixedly installed between miniature image display and lens that miniature image display and miniature image display be arranged in parallel；The display screen of miniature image display is oppositely arranged with the top surface of lens, and the bottom surface of lens is provided with reflectance coating；Angle at an acute angle is set between the top surface of semi-transparent semi-reflecting level crossing and the display screen of miniature image display, and the top surface of semi-transparent semi-reflecting level crossing is used to receive exterior light；In miniature image display broadcasting pictures, the light of broadcasting pictures is transmitted through lens through semi-transparent semi-reflecting plane mirror section, and via lens bottom reflection to the bottom surface of semi-transparent semi-reflecting level crossing.Simple structure of the present invention and practical, by the setting of structure effectively increase near-eye display device field of view angle and viewing as matter, and then improve the applicability and reliability using the near-eye display device of the optical system.
Description
Technical field
The present invention relates to technical field of virtual reality, and in particular to a kind of nearly eye display optical system.
Background technology
Virtual reality technology is an important directions of emulation technology, is emulation technology and computer graphics man-machine interface
The set of the multiple technologies such as technology multimedia technology sensing technology network technology, is a challenging interleaving techniques forward position
Subject and research field.Virtual reality technology (VR) is mainly including simulated environment, perception, natural technical ability and side etc. sensing equipment
Face.Simulated environment is by computer generation, in real time dynamic 3 D stereo photorealism.
And as the head mount display device of one of the infrastructure device for realizing virtual reality technology also with virtual reality technology
Development, obtained the concern of all circles.
In current head mount display device, can augmented reality by the information of virtual world and the information of real world
It is superimposed, but cannot meets the defects such as user's request, definition deficiency because the limitation of structure setting has the angle of visual field, together
When, because of the complexity of its structure, use crowd and the scope of equipment are also limit, it is unfavorable for the popularization of virtual reality technology.
Therefore, a kind of virtual reality display structure that can solve the problem that above mentioned problem how is designed, is problem demanding prompt solution.
The content of the invention
For defect of the prior art, the present invention provides a kind of nearly eye display optical system, simple structure and practicality
By force, the field of view angle of near-eye display device is effectively increased by the setting of structure and is watched as matter, and then improve application and be somebody's turn to do
The applicability and reliability of the near-eye display device of optical system.
In order to solve the above technical problems, the present invention provides following technical scheme：
On the one hand, the invention provides a kind of nearly eye display optical system, the system include miniature image display and
Lens that the miniature image display be arranged in parallel and it is inclined be fixedly installed on the miniature image display with
Semi-transparent semi-reflecting level crossing between lens；
The display screen of the miniature image display is oppositely arranged with the top surface of the lens, and the lens bottom surface
It is provided with reflectance coating；
Angle at an acute angle between the display screen of the top surface of the semi-transparent semi-reflecting level crossing and the miniature image display
Set, and the top surface of the semi-transparent semi-reflecting level crossing is used to receive exterior light so that the exterior light partially passes through described semi-transparent
The bottom surface of half antiplane mirror；
In the miniature image display broadcasting pictures, the light of broadcasting pictures is saturating through the semi-transparent semi-reflecting plane mirror section
Be incident upon the lens, and via the lens bottom reflection to the bottom surface of the semi-transparent semi-reflecting level crossing so that the broadcasting
The light and exterior light of picture are sent by the bottom surface of the semi-transparent semi-reflecting level crossing.
Further, between the display screen of the top surface of the semi-transparent semi-reflecting level crossing and the miniature image display
Sharp angle is 45 °.
Further, the system also includes：Imaging len；
The imaging len is fixedly installed between miniature image display and semi-transparent semi-reflecting level crossing, and the imaging is saturating
Mirror be arranged in parallel with the display screen of the miniature image display so that after the light of broadcasting pictures amplifies through the imaging len
Inject the semi-transparent semi-reflecting level crossing.
Further, the imaging len is simple lens or lens group.
Further, the system also includes：Refractive index is higher than air and less than the medium bucket of lens；
The medium bucket is coaxially disposed with the lens, and medium bucket encloses and is located at the outer of the semi-transparent semi-reflecting level crossing
Portion.
Further, the top surface and the miniature image display of the medium bucket of the miniature image display are close to
Display screen be oppositely arranged.
Further, the distance between the display screen of the miniature image display and top surface of the lens be more than or
Equal to 22mm.
Further, the lens are simple lens.
Further, the lens are cemented doublet or three balsaming lens.
Further, the light transmission of the semi-transparent semi-reflecting level crossing is 50% with light reflectivity.
As shown from the above technical solution, a kind of nearly eye display optical system of the present invention, including miniature image shows
Lens that device and miniature image display be arranged in parallel and it is inclined be fixedly installed on miniature image display with it is saturating
Semi-transparent semi-reflecting level crossing between mirror；The display screen of miniature image display is oppositely arranged with the top surface of lens, and lens
Bottom surface is provided with reflectance coating；Angle at an acute angle sets between the top surface of semi-transparent semi-reflecting level crossing and the display screen of miniature image display
Put, and the top surface of semi-transparent semi-reflecting level crossing is used to receive exterior light；In miniature image display broadcasting pictures, broadcasting pictures
Light is transmitted through lens through semi-transparent semi-reflecting plane mirror section, and via lens bottom reflection to the bottom surface of semi-transparent semi-reflecting level crossing；
Simple structure of the present invention and practical, field of view angle and the viewing of near-eye display device are effectively increased by the setting of structure
As matter, and then improve the applicability and reliability using the near-eye display device of the optical system.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it is therefore apparent that drawings in the following description are of the invention
Some embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to this
A little accompanying drawings obtain other accompanying drawings.
Fig. 1 is that the structure of the first specific embodiment of a kind of near eye display optical system of the embodiment of the present invention one is shown
It is intended to；
Fig. 2 is that the structure of second specific embodiment of a kind of near eye display optical system of the embodiment of the present invention two is shown
It is intended to；
Fig. 3 is that the structure of the third specific embodiment of a kind of near eye display optical system of the embodiment of the present invention three is shown
It is intended to；
Fig. 4 is the structural representation of nearly eye display optical presentation system in application example of the present invention；
Fig. 5 is optical system parameter mark schematic diagram in application example of the present invention；
Fig. 6 is the structural representation of the optical system based on dialyte lens in application example of the present invention；
Fig. 7 is the structural representation of the optical system based on integral type lens in application example of the present invention；
Fig. 8 is optical system around visual field analysis pixel schematic diagram in application example of the present invention；
Wherein, 10- miniature images display；The semi-transparent semi-reflecting level crossings of 20-；30- lens；31- reflectance coatings；40- imagings are saturating
Mirror；50- media bucket.
Specific embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, clear, complete description is carried out to the technical scheme in the embodiment of the present invention, it is clear that described embodiment is
A part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
Embodiments of the invention one provide a kind of the first specific embodiment of nearly eye display optical system, referring to figure
1, the system specifically includes following content：
Lens 30 that miniature image display 10 and the miniature image display 10 be arranged in parallel and oblique
State is fixedly installed on the semi-transparent semi-reflecting level crossing 20 between the miniature image display 10 and lens 30.
In the miniature image display 10, display screen and the lens 30 of the miniature image display 10
Top surface is oppositely arranged, the distance between the display screen of the miniature image display 10 and top surface of the lens 30 be more than or
Bottom surface equal to 22mm, and the lens 30 is provided with reflectance coating 31；Wherein, the preferred dimension of miniature image display 10 it is small and
High-resolution display screen, helps to reduce the volume and weight of optics module, and the miniature image display 10 is aobvious
Display screen curtain can be LCD display, and the distance between the miniature image display 10 and described lens 30 are this optical system
The focal length of system.
In the semi-transparent semi-reflecting level crossing 20, top surface and the miniature image of the semi-transparent semi-reflecting level crossing 20 show
Angle at an acute angle is set between the display screen of device 10, and optimal sharp angle is 45 °, and the semi-transparent semi-reflecting level crossing top
Face is used to receive exterior light so that the exterior light partially passes through the bottom surface of the semi-transparent semi-reflecting level crossing, in people using being provided with
During the equipment of this optical system, can be seen outside the incoming part of throwing in the side of the bottom surface of the semi-transparent semi-reflecting level crossing 20
Portion's light, wherein, light transmission and the light reflectivity of the semi-transparent semi-reflecting level crossing 20 are 50%, and the exterior light can be people
The indoor light of work, or natural light.
In the lens 30, the lens 30 can be simple lens, the lens 30 can also for cemented doublet or
Three balsaming lens, in lens 30, the face type of lens can for curved surface, plane or needed according to practical application and set other
The face type of shape.
In the foregoing description, in 10 broadcasting pictures of miniature image display, the light of broadcasting pictures is through described semi-transparent
The fractional transmission of half antiplane mirror 20 to the lens 30, and via the lens 30 bottom reflection to the semi-transparent semi-reflecting plane
The bottom surface of mirror 20 so that the light and exterior light of the broadcasting pictures are sent by the bottom surface of the semi-transparent semi-reflecting level crossing, people
When using the equipment for being provided with this optical system, projection can be seen simultaneously in the side of the bottom surface of the semi-transparent semi-reflecting level crossing
The portion of external light and the broadcasting pictures of the miniature image display 10 for coming over, realize virtual world information and real world
The superposition of information.
Knowable to foregoing description, embodiments of the invention effectively increase regarding for near-eye display device by the setting of structure
Rink corner degree and viewing improve the applicability and reliability using the near-eye display device of the optical system as matter.
Embodiments of the invention two provide a kind of second specific embodiment of nearly eye display optical system, referring to figure
2, the system specifically also includes following content：
Imaging len 40, the imaging len 40 is fixedly installed on miniature image display 10 with semi-transparent semi-reflecting level crossing 20
Between, and the imaging len 40 be arranged in parallel with the display screen of the miniature image display 10 so that broadcasting pictures
Light injects the semi-transparent semi-reflecting level crossing 20, and the imaging len 20 according to actual conditions after amplifying through the imaging len 40
Can be simple lens or lens group.
In the foregoing description, after the image of miniature image display 10 is amplified imaging by the imaging len 40, then
Through following imaging len 40 and semi-transparent semi-reflecting level crossing 20 so that the image of miniature image display 10 is final through semi-transparent semi-reflecting
Level crossing 20 is projected, and is received by the eyes of user, and the face type of the imaging len 40 can be for curved surface, plane or according to reality
The face type of the other shapes that border application needs and sets.
Knowable to foregoing description, embodiments of the invention realize the premise in the size for not changing miniature image display
Under, it is also ensured that the effect focal length of nearly eye display optical system is optimum distance, it is ensured that the angle of visual field of near-eye display device
Degree and viewing are as matter.
Embodiments of the invention three provide a kind of the third specific embodiment of nearly eye display optical system, referring to figure
3, the system specifically also includes following content：
Higher than air and less than the medium bucket 50 of lens, the medium bucket 50 is coaxially disposed refractive index with the lens 30,
And the medium bucket 50 encloses the outside for being located at the semi-transparent semi-reflecting level crossing 20；Wherein, near the miniature image display 10
Medium bucket 50 top surface described in the display screen of miniature image display 10 be oppositely arranged, the top surface of the medium bucket 50
Face type can be curved surface, plane or the face type of other shapes for being needed according to practical application and being set, and with the microdrawing
As the relative one side of the display screen of display 10 can be the face types such as convex surface, plane or concave surface.
Knowable to foregoing description, embodiments of the invention ensure that micro-display and bottom lens apart from while increase
Big viewing visual angle, while the lens face close to display can also need for curved surface, plane or according to practical application and set
The face type of other shapes, so can further improve image quality.
It is further instruction this programme, the present invention also provides a kind of application example of nearly eye display optical system, should
Following content is specifically included with the optical system in example：
(1) miniature image display：Optical system miniature image display optical system this segment distance is no less than 22mm,
Can not be produced completely into human eye with the light for meeting real world and blocked.
(2) half-reflection and half-transmission level crossing：The eyeglass is the level crossing that 50% ratio transmits the reflection of 50% ratio, and it is relative to micro-
Type display screen overturning angle at 45 ° is placed.
(3) lens of reflectance coating are coated with：The lens can for simple lens, cemented doublet, three balsaming lens etc., and
The last of lens is simultaneously coated with reflectance coating.
The structural representation of the optical system being illustrated in figure 4 in this application example, the optical system is shown by miniature image
Show that device, half-reflection and half-transmission level crossing, bottom surface are coated with the lens composition of reflectance coating.The light that miniature image display sends, through more than half
Anti- semitransparent mirror, a certain proportion of light is transmitted through, and subsequently into the lens for being coated with reflectance coating, is sent out in the bottom surface of the lens
Lens are again passed through after raw reflection, is reflected at half-reflecting half mirror, into human eye.The light that the object of real world sends
Human eye is transmitted into by half-reflection and half-transmission level crossing.It is achieved thereby that the superposition of virtual world information and real-world information.
The nearly eye display optical system optical path analysis of 2. 3 kinds of above-mentioned optical system include：
(1) three kind of optical system displaying scheme
Scheme one：Optical system based on simple lens
As shown in figure 5, by taking a pixel on miniature image display as an example, the light that spot light sends is through more than half
Anti- semitransparent mirror, a certain proportion of light transmissive, into the lens for being coated with reflectance coating, is rolled on the surface of lens
Penetrate, then reflected in last face, then by the refraction of lens surface.Because miniature image display is located at the lens
Focal plane on, so from lens outgoing light be collimated light beam, then collimated light beam is by half-reflection and half-transmission level crossing, one
The directional light of certainty ratio is reflected, subsequently into human eye.The light of outside real world is certain to compare by half-reflection and half-transmission level crossing
The light of example enters human eye.So, the information superposition of virtual world has been arrived in real world.
The focal length of the optical system is f, and horizontal field of view angle is θ, and the length of miniature image display is η.Can by formula (1)
Know：
When the timing of miniature image display sizes one, reduce the focal length of optical system, the angle of visual field can be increased.And in order to protect
Card optical system does not block the vertical height h >=22mm of the sight line of people, miniature image display and lens, then focal length f>h≥
22mm.So the focal length of optical system should be selected suitably, while ensureing that sight line is not blocked, increase the angle of visual field.With 0.7 English
As a example by very little LCD display, the focal length that design obtains optical system is 25mm, is calculated by formula (1), diagonal angles of visual field
It is 42 °.
Scheme two：Optical system based on dialyte lens
By above-mentioned analysis it is known that in order to obtain big viewing visual angle, must just reduce the focal length of bottom lens, this
The condition that have to be larger than 22mm with the interval of miniature image display and bottom lens generates contradiction.Therefore, in order to adjust this
Individual contradiction is further increasing visual angle, it is proposed that the optical system based on dialyte lens.
As shown in fig. 6, between miniature image display and half-reflection and half-transmission level crossing place imaging len (simple lens, thoroughly
Microscope group all can), after the image on miniature image display is amplified imaging by the lens, then by following optics,
Eventually enter into human eye.Imaging len amplifies the image on miniature image display, equivalent to the length η of miniature image display
Increase, can be released by formula (1), and in the case where the focal length of holding optical system is constant, the visual angle of optical system increases.
Scheme three：Optical system based on integral type lens
In order that the assembling for obtaining optical system more facilitates, the optical system scheme based on integral type lens, such as Fig. 7 are proposed
It is shown.This scheme is that the top of bottom lens in scheme one is replaced with into refractive index higher than air but saturating less than bottom by air
The medium bucket of mirror Refractive Index of Material, such as bottom lens material are PC, and medium stave wood material is PMMA, and it is anti-to be placed with half in medium bucket
Pellicle mirror is, it is necessary to explanation, above-mentioned material is only citing, and the combination of other optical materials is also within protection domain.
This optical texture ensure that micro-display and bottom lens apart from while increase viewing visual angle, while connecing
The lens face of nearly display is also curved surface, the face type of plane or the other shapes for being needed according to practical application and being set, and so may be used
Further to improve image quality.
In addition, the bottom lens for being directed to above-mentioned three kinds of schemes can be changed to double glued or three balsaming lens.Double gluings
Or three balsaming lens than simple lens complex structure, therefore have the ability of more preferable aberration correction.Can so ensure that structure is tight
The image quality of optical system is improved while gathering.
(2) human eye is rotated and coefficient of vignetting adjustment
In a practical situation, during user's viewing around visual field, eyeball can be rotated to surrounding.Be suitable for the situation, it is miniature
The light that the pixel of different visual fields sends on image display is by after optical system, meeting is incident with the directional light of different angles
To human eye.As shown in figure 8, the light that 1. pixel sends finally enters human eye with descending directional light, what 2. pixel sent
The final directional light with level of light enters human eye, and the light that 3. pixel sends finally enters human eye with up directional light.
According to maximum field of view's light, the coefficient of vignetting and visual field offset amount of Reasonable adjustment optical system, so as to reach preferably viewing effect
Really.
Knowable to foregoing description, application example simple structure of the invention and practical, the setting by structure is effective
Improve the field of view angle of near-eye display device and watch as matter, and then improve using the near-eye display device of the optical system
Applicability and reliability.
Above example is merely to illustrate technical scheme, rather than its limitations；Although with reference to the foregoing embodiments
The present invention has been described in detail, it will be understood by those within the art that：It still can be to foregoing each implementation
Technical scheme described in example is modified, or carries out equivalent to which part technical characteristic；And these are changed or replace
Change, do not make the spirit and scope of the essence disengaging various embodiments of the present invention technical scheme of appropriate technical solution.
Claims (10)
1. a kind of nearly eye display optical system, it is characterised in that the system includes miniature image display and the microdrawing
The lens that are be arranged in parallel as display and inclined it is fixedly installed between the miniature image display and lens
Semi-transparent semi-reflecting level crossing；
The display screen of the miniature image display is oppositely arranged with the top surface of the lens, and the bottom surface of the lens is provided with
Reflectance coating；
Angle at an acute angle is set between the display screen of the top surface of the semi-transparent semi-reflecting level crossing and the miniature image display,
And the top surface of the semi-transparent semi-reflecting level crossing is used to receive exterior light so that the exterior light partially passes through described semi-transparent semi-reflecting flat
The bottom surface of face mirror；
In the miniature image display broadcasting pictures, the light of broadcasting pictures is transmitted through through the semi-transparent semi-reflecting plane mirror section
The lens, and via the lens bottom reflection to the bottom surface of the semi-transparent semi-reflecting level crossing so that the broadcasting pictures
Light and exterior light sent by the bottom surface of the semi-transparent semi-reflecting level crossing.
2. system according to claim 1, it is characterised in that the top surface of the semi-transparent semi-reflecting level crossing and the microdrawing
As the sharp angle between the display screen of display is 45 °.
3. system according to claim 1, it is characterised in that the system also includes：Imaging len；
The imaging len is fixedly installed between miniature image display and semi-transparent semi-reflecting level crossing, and the imaging len with
The display screen of the miniature image display is be arranged in parallel so that the light of broadcasting pictures is injected after amplifying through the imaging len
The semi-transparent semi-reflecting level crossing.
4. system according to claim 3, it is characterised in that the imaging len is simple lens or lens group.
5. system according to claim 1, it is characterised in that the system also includes：Refractive index is higher than air and is less than
The medium bucket of lens；
The medium bucket is coaxially disposed with the lens, and medium bucket encloses the outside for being located at the semi-transparent semi-reflecting level crossing.
6. system according to claim 5, it is characterised in that near the medium bucket of the miniature image display
Top surface is oppositely arranged with the display screen of the miniature image display.
7. system according to claim 1, it is characterised in that the display screen of the miniature image display with it is described
The distance between top surface of mirror is more than or equal to 22mm.
8. system according to claim 1, it is characterised in that the lens are simple lens.
9. system according to claim 1, it is characterised in that the lens are cemented doublet or three balsaming lens.
10. system according to claim 1, it is characterised in that the light transmission of the semi-transparent semi-reflecting level crossing is anti-with light
The rate of penetrating is 50%.
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| CN201710073951.5A CN106773061B (en) | 2017-02-10 | 2017-02-10 | Near-eye display optical system |
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|---|---|---|---|
| CN201710073951.5A CN106773061B (en) | 2017-02-10 | 2017-02-10 | Near-eye display optical system |
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| CN108389531A (en) * | 2018-02-28 | 2018-08-10 | 北京眸合科技有限公司 | A kind of air suspension display system |
| CN109459859A (en) * | 2018-12-21 | 2019-03-12 | 舒伟 | A kind of near-eye display system and spectacle virtual monitor |
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|---|---|
| CN106773061B (en) | 2023-09-26 |
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