CN208654444U - A kind of binocular optical mirror - Google Patents
A kind of binocular optical mirror Download PDFInfo
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- CN208654444U CN208654444U CN201821180086.0U CN201821180086U CN208654444U CN 208654444 U CN208654444 U CN 208654444U CN 201821180086 U CN201821180086 U CN 201821180086U CN 208654444 U CN208654444 U CN 208654444U
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- binocular optical
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Abstract
The utility model provides a kind of binocular optical mirror, is configured as including integrally formed left mirror and right mirror, and the bridge portion of connection left mirror and right mirror, the bridge portion when binocular optical mirror is placed in front of human eye, is located on the bridge of the nose；The left mirror and right mirror respectively include a free curved surface prism, the free curved surface prism includes three effective optical surfaces, three effective optical surfaces include the surface of an at least free form surface, wherein, the surface of the free form surface is to catadioptric image light so that image source image obtains preset magnifying power and keeps aberration；The exit facet of described image light and/or the plane of incidence of image light are set to the surface of non-free curved surface；The surface of the free form surface includes that left mirror/right mirror is surrounded volume morphing by the reflecting layer with predefined reflectivity, effective optical surface and other surfaces.Using binocular optical mirror described in the utility model, visual field can be expanded, increase exit pupil diameter, promote user experience.
Description
Technical field
The utility model relates to a kind of optical systems.Especially a kind of binocular optical mirror for head-mounted display apparatus.
It can be widely applied to virtual reality and augmented reality display field.
Background technique
In recent years, wearable virtual reality and augmented reality display device achieve significant progress, especially head
Display device is worn, because it is widely applied, is increasingly received and is approved by users.Since head-wearing display device is worn and is seen
The person of examining head, it is therefore necessary to compact and lightweight.In addition, field angle, emergent pupil etc. also will affect the wearing experience of observer.
To solve the problems, such as big visual field, the optical system of head-wearing display device gradually from the symmetrical projection-type structure of coaxial rotating to
Catadioptric configuration develops.But often this kind of optical system structure is more complicated, and some is using a large amount of optical element, by optics
Element central deviates optical axis and relative to inclined light shaft, and some uses diffraction/holographic optical elements (HOE) and plastic material, some applications
Special face type it is aspherical, increase the freedom degree of optical design, but these design processing costs are more expensive, the dress of optical system
It adjusts also extremely difficult.
Currently, some optical systems use the optical texture of free form surface means of reflecting prism formula, it can be effective using catadioptric optical path
The compactness of raising system reduces the volume of system entirety.Meanwhile the face type of free form surface can increase the design freedom of system
Degree, to improve image quality to control image deformation to greatest extent, reduce system aberration.
The patent of invention of Patent No. US5699194, using free curved surface prism, light reflects on free form surface surface 2
Once, reflected twice on optical surface 4, finally enter human eye through surface 2, the visual field of the optical system no more than 30 ° of H ×
22.8 ° of V, exit pupil diameter 4mm.Olympus proposes similar structure in the patent of patent No. US5701202, and
One piece of lens is increased between prism and image source, maximum field of view is 45 ° of H × 34.5 ° V, exit pupil diameter 4mm.
Free curved surface prism is also used in the patent US6417970 of Interactive imaging systems company
A part as helmet display optical system.Some patents increase between prism surface 4 and image source 5 or emergent pupil and prism
One piece of lens or diffraction element, to achieve the purpose that eliminate color difference and aberration, some patents 2 increase diffraction optical element in front
Increase diffraction optical element.Patent US6181475 increases diffraction optical element between emergent pupil 1 and prism 2, some in the patent
Example increases graded index materials lens between prism 4 and display 5.The US6646812 patent of Olympus is preceding
Face increases one piece of lens, and distance of exit pupil is very long, but visual field very little.
The companies such as Olympus, Canon have successively also applied for the similar use multinomial patent of invention of free curved surface prism, knot
Configuration formula is varied, but major optical parameter is not improved, substantially without solving the problems, such as exit pupil diameter and big visual field.
It is relevant to be related to having used the head mounted display optical system patent of free curved surface prism there are also very much, these patents it is common
Deficiency is that exit pupil diameter is small, and used image Source size is bigger, for the system of exit pupil diameter very little, different users
Interpupillary distance conciliation must be carried out, is used to product and brings very big trouble.In the case where interpupillary distance is constant, user eyeball is slightly moved
It is dynamic to can't see image, the service performance of product is influenced, its application is further influenced.
Summary of the invention
In view of this, realizing big field angle, big emergent pupil the main purpose of the present invention is to provide a kind of binocular optical mirror
Away from；In order to achieve the above objectives, the technical scheme of the present invention is realized as follows:
A kind of binocular optical mirror for being amplified to image, including integrally formed left mirror and right mirror, and connection
The bridge portion of left mirror and right mirror, the bridge portion are configured as when binocular optical mirror is placed in front of human eye, are located on the bridge of the nose；It is described
Left mirror and right mirror respectively include three effective optical surfaces, effective optical surface and non-effective optical surface and left mirror/right mirror are enclosed
At volume morphing；Wherein, three effective optical surfaces include the surface of an at least free form surface, the surface packet of the free form surface
The reflecting layer with predefined reflectivity is included, to catadioptric image light so that image source image obtains preset magnifying power and keeps picture
Difference；
The exit facet of described image light and/or the plane of incidence of image light are set to the surface of non-free curved surface.
Further, the free form surface surface can be stated by XY polynomial surface, and descriptive equation is as follows:
Wherein c is surface curvature, and k is the constant of the cone, and Ci is multinomial coefficient.
Further, the surface face type of the non-free curved surface is selected from the ball that aspherical or radius of curvature is greater than 100mm
Face.
Further, the projector distance of the horizontal direction on the surface of the free form surface is less than or equal to 20mm.
Further, sealing support portion is formed around left and right mirror plane of incidence periphery, for sealing display device to the plane of incidence
Space, and support the predetermined location relationship of display device and the plane of incidence.
Binocular optical mirror further comprises the compensating glass being respectively attached on the outside of left mirror and right mirror；The compensating glass and left/right
Mirror is glued, or by being mechanically fixed, there are air diaphragms in centre.
Further, the face type of the compensating glass optical surface adjacent with left/right mirror and the free form surface keeps one
It causes, optical surface of the optical surface of Environment Oriented side with left/right mirror close to human eye side is parallel.
Further, the vertical section of the volume morphing is circular cross-section, polygonal cross-section, adapts to outline border shape.
Further, fixed part is stretched out in two avris of optical frames and bridge portion upwards, for being fixed with frame, the fixed part and
Optical frames is integrally formed or individually connects.
Alternatively, fixed part, for fixing with temple, the fixed part and light are stretched out in the lateral wearer direction in optical frames both sides
It is integrally formed to learn mirror.
Using binocular optical mirror of the present invention, is designed using being integrally formed, be conducive to wear, alleviate weight, light
The prism facets type for learning mirror includes free form surface, increases visual field, expands exit pupil diameter, improves the wearing experience of user.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of binocular optical mirror described in the utility model；
Fig. 2 is the left view of the left mirror of binocular optical mirror；
Left view when Fig. 3 is the Zuo Jingyu compensating glass gluing of binocular optical mirror；
Fig. 4 has left view when gap for the Zuo Jingyu compensating glass of binocular optical mirror.
Fig. 5 is the glasses schematic diagram that one kind illustratively includes the utility model binocular optical mirror
Specific embodiment
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is a part of the embodiment of the utility model, instead of all the embodiments.Based on the reality in the utility model
Example is applied, every other embodiment obtained by those of ordinary skill in the art without making creative efforts all belongs to
In the scope of protection of the invention.
The utility model provides a kind of binocular optical mirror, as shown in Figure 1, including left mirror 1 and right mirror 2；And the left mirror 1 of connection
With the inverted U bridge portion 3 of right mirror 2；
Left mirror 1 and right mirror 2 correspond respectively to the left and right mesh of human eye, together with the bridge portion 3 of inverted U, by integrated through injection molding at
Left and right mirror is connected to one by U-shaped bridge portion by way of glued or mechanical connection as replaceable scheme by type
It rises.When binocular optical mirror is placed in front of human eye, the bridge portion 3 of junction is located on the bridge of the nose.
For the ease of fixation, fixed part (not shown) is stretched out in two avris of binocular optical mirror and bridge portion, is used for frame (not
Show) it is fixed, the fixed part and optical frames can be integrally formed, can also be independent two connected parts.Binocular optical
Mirror is circle, polygon etc. in the vertical section perpendicular to generally horizontal direction of visual lines, is adapted with frame.
Further, being formed on the plane of incidence periphery of the close image source of binocular optical mirror or so mirror has sealing function
Support portion (not shown), described image source is issued by small sizes flat-panel display devices such as display such as LCD or OLED, to display
The space of device to the plane of incidence is sealed, and supports the predetermined location relationship of display device and the plane of incidence.
Since the structure of left and right mirror is identical, for ease of description, being illustrated by taking left mirror 1 as an example to binocular optical mirror below.
As shown in Fig. 2, being the left view of left mirror 1, Zuo Jing 1 is a free curved surface prism body 11, including three effective light
Learn surface, wherein the first optical surface 111 has plane or curved surface face type, is arranged in face of display, and display issues
Image light be refracted into left mirror 1 via the first optical surface 111 (being denoted as light incident surface), to its second light in left mirror 1
It learns surface 112 to propagate, when reaching the second optical surface 112 for the first time, image light occurs anti-in complete on the surface 112 of left mirror 1
It penetrates, is reflected again on the third optical surface 113 of reflected light to left mirror 1, the transmission of surface 112 of Jing Zuojing 1 (is denoted as light to go out
Penetrate face), reach the exit pupil position EPD of human eye；Wherein, the face type of the second optical surface 112, which need to meet, makes to reach its for the first time
Image light realizes the condition of total internal reflection, also, since the second optical surface 112 is towards EPD, need to usually be exposed to outside, preferably
It is set to the surface face type for being conducive to be protected and handled, for example, the spherical surface or aspherical for being greater than 100mm is presented, to make
Second optical surface 112 is suitable to be handled using existing various processing equipments, meanwhile, third optical surface 113 has certainly
It is provided with reflecting layer on third optical surface 113, makes figure to improve the ability to various aberration corrections by the face type of curved surface
The inside of left mirror 1 can be reflected back toward when being incident on the surface 113 of left mirror 1 as light, the reflectivity in reflecting layer can be according to display
The light emission luminance of device is selected, and to ensure that the image light of display is used effectively as far as possible, and is reached with brightness needs
Balance, it is preferred that the free form surface of third optical surface in the horizontal direction (i.e. along direction of visual lines) on projector distance be less than or
Equal to 20mm.
Further, the face type of the first optical surface 111 is preferably advisable with free form surface, to be further introduced into focal power
The magnifying power to image is improved, and helps the correction of various aberrations.In this way, the image light of display is met again by left mirror 1
Coke, make the image seen by person from display look like from from several feet aways of eyes place issue rather than from
What the place (position at the practical place of the display) of about one inch issued, realize the virtual image of amplification.
Image light-emitting face is 10mm~65mm in the projector distance of vertical direction.
According to the abovementioned embodiments of the present invention, each free curved surface can pass through XY polynomial surface (XY
Polynomial, abbreviation XYP) it states, descriptive equation is as follows:
Wherein c is surface curvature, and k is the constant of the cone, and Ci is multinomial coefficient.The design data such as table of the left mirror
Described in 1:
It will be appreciated by those skilled in the art that, the data in above table are only to meet one group of the utility model to show
Example is not used to limit the utility model, as long as the binocular optical mirror mirror for meeting the utility model all meets the utility model
It is required that.
Left mirror 1 further comprises compensating glass 12, as shown in figure 3, compensating glass 12 and free curved surface prism 11 are glued, or
It is fixed by as shown in Figure 4 by mechanical (not shown), there is air diaphragms between the two, wherein
As shown in Figure 4, the compensating glass 12 includes at least two effective optical surfaces, 121 court of the first optical surface
To free curved surface prism 11, the third optical surface 113 of face type and free curved surface prism 11 is completely the same, the second optics table
Face 122 is parallel with the second optical surface 112 of free curved surface prism 11, and compensating glass 12 further includes lower surface 123.Extraneous light is logical
Second optical surface 122 of overcompensation mirror 12 and the third optical surface 113 of the first optical surface 121, free curved surface prism 11
It is incident on human eye with the second optical surface 112, in conjunction with the image light that display issues, is incident to people via free curved surface prism 11
Eye realizes virtual reality fusion.Adjust free curved surface prism 11 third optical surface reflectance coating reflectivity, make extraneous light and
The light that display issues reaches balance, it is preferred that reflectivity 1/2, using half-reflection and half-transmission reflectance coating.
Left/right mirror with compensating glass make towards the surface of environment 122 with towards the surface of human eye 112 in parallel plane
Or spherical surface, so that binocular optical mirror is may make up smooth appearance, so as to realize further moulding or integrated molding.One
The illustrative mode of kind as shown in figure 5, the binocular optical mirror with compensating glass is formed as the external form of polygon, rectify with common by profile
Mirror holder/Sunglasses frame external form of positive eyesight is similar, since thickness is greater than the eyeglass commonly corrected defects of vision within usual 5mm,
When effectively sealing and supporting the predetermined location relationship of display, the outline border of fixing len it is not necessary to, it is common as wearing
The eyeglass corrected defects of vision is the same, and temple may be connected directly to the fixed part or selectable of mirror side stretching, is configured to temple
Plastic material same as eyeglass is integrally formed with left mirror and right mirror.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.
Claims (10)
1. a kind of binocular optical mirror, which is characterized in that including integrally formed left mirror and right mirror, and connect left mirror and right mirror
Bridge portion, the bridge portion are configured as when binocular optical mirror is placed in front of human eye, are located on the bridge of the nose；
The left mirror and right mirror respectively include three effective optical surfaces, effective optical surface and non-effective optical surface left
Mirror/right mirror surrounds volume morphing；Wherein,
Three effective optical surfaces include the surface of an at least free form surface,
The surface of the free form surface includes the reflecting layer with predefined reflectivity, to catadioptric image light so that image source image obtains
Preset magnifying power simultaneously keeps aberration；
The exit facet of described image light and/or the plane of incidence of image light are set to the surface of non-free curved surface.
2. binocular optical mirror as described in claim 1, which is characterized in that the free form surface surface can pass through XY multinomial
Curved surface is stated, and descriptive equation is as follows:
Wherein c is surface curvature, and k is the constant of the cone, and Ci is multinomial coefficient.
3. binocular optical mirror as claimed in claim 2, which is characterized in that the surface face type of the non-free curved surface is selected from aspheric
Face or radius of curvature are greater than the spherical surface of 100mm.
4. binocular optical mirror as claimed in claim 3, which is characterized in that the throwing of the horizontal direction on the surface of the free form surface
Shadow distance is less than or equal to 20mm.
5. binocular optical mirror according to claim 1, which is characterized in that form sealing branch around left and right mirror plane of incidence periphery
Support part for sealing display device to the space of the plane of incidence, and supports the predetermined location relationship of display device and the plane of incidence.
6. binocular optical mirror according to any one of claims 1 to 5, which is characterized in that described further comprises being respectively attached to
Compensating glass on the outside of left mirror and right mirror；
The compensating glass and left/right mirror are glued, or by being mechanically fixed, there are air diaphragms in centre.
7. binocular optical mirror according to claim 6, which is characterized in that the compensating glass optics adjacent with left/right mirror
Surface and the face type of the free form surface are consistent, and the optical surface of Environment Oriented side is with left/right mirror close to the light of human eye side
It is parallel to learn surface.
8. binocular optical mirror according to claim 7, which is characterized in that the vertical section of the volume morphing be circular cross-section,
Polygonal cross-section adapts to outline border shape.
9. binocular optical mirror according to claim 8, which is characterized in that fixation is stretched out in two avris of optical frames and bridge portion upwards
Portion, for fixing with frame, the fixed part and optical frames are integrally formed or individually connect.
10. the binocular optical mirror according to claim 5 or 8, which is characterized in that stretch in the lateral wearer direction in optical frames both sides
Fixed part out, for fixing with temple, the fixed part and optical frames are integrally formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821180086.0U CN208654444U (en) | 2018-07-25 | 2018-07-25 | A kind of binocular optical mirror |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821180086.0U CN208654444U (en) | 2018-07-25 | 2018-07-25 | A kind of binocular optical mirror |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208654444U true CN208654444U (en) | 2019-03-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821180086.0U Active CN208654444U (en) | 2018-07-25 | 2018-07-25 | A kind of binocular optical mirror |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208654444U (en) |
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2018
- 2018-07-25 CN CN201821180086.0U patent/CN208654444U/en active Active
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