CN107656371A - Optical system with diopter adjustment function - Google Patents
Optical system with diopter adjustment function Download PDFInfo
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- CN107656371A CN107656371A CN201710959388.1A CN201710959388A CN107656371A CN 107656371 A CN107656371 A CN 107656371A CN 201710959388 A CN201710959388 A CN 201710959388A CN 107656371 A CN107656371 A CN 107656371A
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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
- 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
- G02B27/017—Head mounted
- G02B27/0172—Head mounted characterised by optical features
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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
- G02B2027/0129—Head-up displays characterised by optical features comprising devices for correcting parallax
Abstract
A kind of optical imaging system with diopter adjustment function, image source including generating image light, first lens group, liquid lens and the second lens group with zoom function, and free curved surface prism, image light pass sequentially through above-mentioned optical component, reach exit pupil plane and enter eyes imaging, diopter adjustment function is realized, solves requirement of the wearer to vision accommodation, improves the convenience and comfortableness of wearing；Diopter adjustment is achieved in that using such as liquid lens, avoid axial mechanical zoom structure design and the adjustment of complexity, with reference to the visual amplifier element of free curved surface prism formula, in imaging optical system design, can provide distortion it is small, as high, the compact-sized optical imaging system of matter, reduce the rigging error of optical system.
Description
Technical field
The present invention relates to a kind of optical system with diopter adjustment function, specifically, be related to one kind has diopter off axis
The visual system of regulatory function.
Background technology
The image of image source is amplified and is presented on user at the moment head-mounted display apparatus by optical system by visual observation, according to
The different visual effect of different application presentations, such as 3D display, augmented reality application, and because image only enters user one
In individual human eye, relatively conventional display has more preferable privacy.With the fast development of virtual reality and augmented reality, wear-type
Display device is received more and more attention due to its huge market value and development potentiality.
The nearly eye of transmission-type shows that (Near Eye Display, NED) system is that one kind is worn on user at the moment and to wear
Person provides visual virtual image does not influence the low profile photovoltaic display device that user observes extraneous real scene simultaneously.Transmission-type NED
Computer virtual picture signal is produced by micro-display, is then coupled into human eye by shadow casting technique etc., at the same it is extraneous true
Real scene image enters human eye by Light Transmission or video transmission-type technology, realizes melting for virtual signal and real scene
Close.Light Transmission near-eye display system does not hinder sight because of it so that user does not influence it while virtual scene is observed
Observation to extraneous scene, military affairs, scientific research, augmented reality, industry assembling and maintenance, simulated training, medical treatment, navigation,
Many fields such as 3D display and entertainment applications and aspect all have broad application prospects, and have great economic results in society.
Because head mounted display is worn on the head of observer, therefore it compact-sized, in light weight must be made with reducing
The wearing burden of user.And for some specific applications need that the distance of the virtual image is adjusted, the regulation of diopter is realized, example
, it is necessary to be equipped with the device of virtual image distance regulation such as in visual exercise, vision correction demand.Current binocular 3D display system
The regulation of virtual image distance generally is carried out using the influx angle of eyes sight using the skew of image, this adjusting method is only fitted
It is to plant the false virtual image apart from regulative mode, actual virtual image face position, which does not have, to be become for the regulation of binocular virtual image distance
Change, this regulative mode in certain diopter scope be it is feasible, but diopter adjustment amount it is too big after be not suitable for wearing for a long time.In addition
One kind realizes that the virtual image apart from regulation scheme is carried out using the distance between display device and visual system is changed, such as Fig. 1 institutes
Show, the light that micro-display is sent enters human eye after eyepiece 102, and human eye is reversely looked light collection against the direction of light
Position is virtual image distance 107, and the relative position by adjusting display and eyepiece changes (to be marked as~106 in such as Fig. 1
Each position) angle of light into human eye is changed, so as to cause the change of virtual image distance, realize the tune of diopter
Section.This regulative mode needs to design the precise displacement structure of image planes regulation, and has enough regulation spaces, adds and is located at
The weight and complexity of optical system at the moment.
The content of the invention
The present invention is directed to propose a kind of compact-sized visual system with diopter adjustment function, and use it
Nearly eye display device, the regulation of different virtual image distances is realized using liquid lens or similar electricity system, gas focusing elements, with reference to
The technologies such as off-axis and free form surface make overall system architecture compacter, while make the image quality of system higher.
The present invention uses following technical scheme：
A kind of optical system that quick diopter adjustment can be achieved, including, intermediate image plane forming apparatus and visual image amplification
Element；
Wherein, the intermediate image plane forming apparatus is receiving the image light from image source to be put in the visual image
The light entrance face of big element forms intermediate image plane, and the visual image amplifier element is will pass through the image light guide of intermediate image plane
Enter user's eyes to form the virtual image of amplification；
The intermediate image plane forming apparatus includes an at least adjustable component, and the adjustable component passes through automatically controlled or pressure
Regulative mode is controlled so as to the change of pre-defined rule occur by its wavefront, so that the optical system is to user's eyes
Diopter realizes quick regulation.
According to the intermediate image plane forming apparatus of the present invention, specifically include the first lens group, liquid lens and the second lens
Group, wherein,
First lens group is used to directly receive the image light from image source；
Described image light forms intermediate image plane after the first lens group, liquid lens and the second lens group successively.
Optionally, first lens group includes three spherical lenses, and second lens group includes three spherical lenses,
First lens group, liquid lens and the coaxial arrangement of the second lens group.
Or first lens group or the second lens group is any comprises at least an aspherical or free form surface, described
One lens group, liquid lens and the second lens group are placed using catadioptric form.
In a kind of mode, the visual image amplifier element includes an at least free curved surface prism, in described
Between image planes set so that it is incident from the upper surface of the free curved surface prism by the image light of the intermediate image plane, pass through successively
Cross after the free curved surface prism left-hand face total reflection, right lateral surface reflection and enter user's eye through the outgoing of prism left-hand face
Eyeball.
The right lateral surface of free curved surface prism is free form surface, the face type of the left-hand face and upper surface be selected from sphere,
One of aspherical or free form surface.
Further, the visual image amplifier element also includes another free curved surface prism, another free form surface
Prism is located on the right side of the free curved surface prism, as compensating prism to cause ambient can be with aberrationless by described another
One free curved surface prism and the free curved surface prism, reach human eye, realize the application of augmented reality.
Compensation is different from the left-hand face of the free curved surface prism with the outer surface face type of free form surface compensating prism, uses
Realize diopter ambient being corrected to required for user's human eye with cooperation.
Interchangeable, visual image amplifier element is included by multiple rotational symmetry spheres or the aspherical eyepiece formed.
The invention enables image light to pass through the first lens group, liquid lens and the second lens group, generates intermediate image plane, in
Between the positions of image planes can adjust to adjust the display distance of virtual image planes.Realize that intermediary image is put down by the regulation and control to liquid lens
The displacement in face, and then by free curved surface prism, realize the regulation of virtual image position.This diopter adjustment scheme is completely by voltage control
System, the design and adjustment of the kinematic mechanisms of complexity are avoided, there is simple and efficient advantage.The present invention is using off-axis free
The design of curved surface prism, with very high flexible design degree compact-sized while, the image quality of system can be improved.
What those skilled in the art were readily appreciated that, the off-axis free surface system can improve system imaging quality, reduce system
The volume of system, traditional sphere, aspherical visual system can be used in such diopter adjustment system；The mode of the focusing is not limited to
The element of the zoom such as liquid lens, other are automatically controlled, pressure control is also applied for the present invention.
Brief description of the drawings
Fig. 1 is eyepiece diopter adjustment principle schematic
Fig. 2 is according to embodiments of the present invention 1 index path with zero optical imaging system；
Fig. 3 is the index path of according to embodiments of the present invention 1 optical imaging system with -8D diopters；
Fig. 4 is the first lens group schematic diagram of the optical imaging system according to Fig. 2 or Fig. 3；
Fig. 5 is the liquid lens structure schematic diagram of the optical imaging system according to Fig. 2；
Fig. 6 is the liquid lens structure schematic diagram of the optical imaging system according to Fig. 3；
Fig. 7 is the second lens group schematic diagram of the optical imaging system according to Fig. 2 or Fig. 3；
Fig. 8 is the free curved surface prism schematic diagram of the optical imaging system according to Fig. 2 or Fig. 3；
Fig. 9 is the free form surface compensating prism schematic diagram of the optical imaging system according to Fig. 2 or Fig. 3；
Figure 10 is the index path according to the optical imaging system with+0D diopters of the embodiment of the present invention 2；
Figure 11 is the index path according to the optical imaging system with -2D diopters of the embodiment of the present invention 2；
Figure 12 is the index path according to the optical imaging system with -8D diopters of the embodiment of the present invention 2.
Figure 13 is the index path according to the optical imaging system with+0D diopters of the embodiment of the present invention 3
The technical characteristic that reference in figure refers to respectively is：
112nd, image source；113rd, image light；114th, the first lens group；14A, the first lens group lens one；It is 14B, first saturating
Microscope group lens two；14C, the first lens group lens three；115th, liquid lens；15A, liquid lens liquid one；15B, liquid lens
Liquid two；15C, liquid lens upper flat plate glass；Plate glass under 15D, liquid lens；15E, liquid lens side glass；
15F, liquid lens electrode one；15G, liquid lens electrode two；Two kinds of 15H, liquid lens liquid interfaces；116th, the second lens
Group；16A, the second lens group lens four；16B, the second lens group lens five；16C, the second lens group lens six；117th, intermediary image
Plane；118th, free curved surface prism；18A, free curved surface prism upper surface；18B, free curved surface prism left-hand face；18C, from
By curved surface prism right lateral surface；111st, system exit pupil plane；119th, free form surface compensating prism.
Embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention, rather than limitation of the invention.It also should be noted that in order to just
Part related to the present invention rather than entire infrastructure are illustrate only in description, accompanying drawing.
Embodiment 1：
As shown in Fig. 2 show a kind of optical imaging system with diopter adjustment function, in+0D diopter states
Index path, the optical imaging system is applied to head mounted display.The optical imaging system, including image source 112, first is saturating
Microscope group 114, liquid lens 115, the second lens group 116, and free curved surface prism 118.
Wherein, image source 112, the first lens group 114, the co-axial alignment of 115 and second lens group of liquid lens 116.Figure
The image light 113 that image source 112 is sent, successively by the first lens group 114, liquid lens 115 with the second lens group 116,
Intermediate image plane 117 is formed between second lens group 116 and free curved surface prism 118.The lens of free curved surface prism 118 and second
Group 116 is placed with predetermined relative position and angle so that the image light 113 can incide the free curved surface prism
Upper surface 18A.The image light 113 of freedom of entry curved surface prism is by free curved surface prism left-hand face 18B total reflections, the right side
Side surface 18C reflections, left-hand face 18B outgoing, reach exit pupil plane 111 and enter human eye, now virtual images are by according to nature
Visual state, which is presented in, is similar to unlimited distance.
Fig. 3 is the index path that optical imaging system shown in Fig. 2 is in -8D diopter states.Compared with Fig. 2, in the control of voltage
Under system, the interface of two kinds of liquid of liquid lens 115 (liquid lens 125 after interface change) is become by face 115E to be turned to
125E, the working condition of the liquid lens 115 (125) is caused to change, specifically, the liquid lens 115 (125)
Focal length change.Correspondingly, in the light path shown in Fig. 3, the position of intermediate image plane is become by 117 turns to 127, final shadow
As light 113, limit remote forms a virtual image in front of human eye, produces negative diopter.
Fig. 5 is the structural representation of the liquid lens 115 (125) under the zero diopter state that is in.The 15A of liquid one and liquid two
15B has different refractive index and immiscible, and the 15A of liquid one has good insulating properties, and the 15B of liquid two has good
Electric conductivity.The 15A of the liquid one and 15B of liquid two is surrounded by upper flat plate glass 15C, lower plate glass 15D, insulating barrier 15H, in electrode
A certain specific voltage is added between one 15F and the 15G of electrode two, electric field occurs between the 15F of electrode one and insulating barrier 15H, causes
Tension force between the 15B of liquid two and insulating barrier 15H changes, and then causes liquid interface 15H curvature to change, and changes
Become the working condition of the optical system.
Fig. 6 is the structural representation for the liquid lens 115 (125) being under a certain negative diopter state.
Compared with prior art, in embodiments of the invention 1, using the first lens group 114, liquid lens 115 (125)
Diopter adjustment function is realized as zoom group with the second lens group 116, this diopter adjustment scheme is controlled by voltage completely, is avoided
The design and adjustment of complicated axials movement mechanical structure, have it is simple, fast, the low advantage of cost.
In embodiments of the invention 1, the design of visual system is carried out using free curved surface prism 118.The present invention's
Technical scheme is relative to prior art, in the case of identical optical parameter, using off-axis structure type, has greatly reduced and is
The volume of system so that system architecture is compacter.In addition, free curved surface prism 118 is using comprising at least free form surface
Face type design, by increasing capacitance it is possible to increase the flexibility ratio of optical design, improve the image quality of the optical imaging system of the present invention.Thus, energy
High imaging quality, the compact-sized optical system with diopter adjustment function are enough provided.
In the present embodiment, the first lens group 114 and the second lens group 116 are designed using sphere, three-chip type, Ke Yili
Solution, in the present invention, the first lens group 114 and the second lens group 116 can also use aspherical or Random Curved Surface Designing with
Increase design freedom, reduce aberration correction difficulty, and be not limited to the structure type of three-chip type.
Further, in embodiments of the invention 1, as shown in figure 8, on the right side of the free curved surface prism 118 also
A compensating prism 119 can be increased.The right lateral surface of free curved surface prism 118 is coated with spectro film, a part of light warp
Film layer reflects, and part in addition transmits through film layer.Compensating prism 119 is joined by gluing with the free curved surface prism 118
Together so that ambient can reach human eye with aberrationless by the compensating prism 119 and free curved surface prism 118.Together
Sample, the compensating prism 120 of cooperation can be designed, as shown in Fig. 9, makes free form surface primary mirror with compensating glass in the table of outermost two
The face type difference in face, which coordinates, is corrected ambient by specific diopter, such as the diopter according to user's glasses body.By
This, the optical imaging system described in embodiments of the invention 1 can allow wearer in the virtual image seen image source and formed through system
While wearer can be allowed to observe external environment again, realize the application of augmented reality.
Free-curved-surface-type is described using the polynomial forms of XY, and equation is as follows：
Table 1-1 exemplarily gives the partial optical structural parameters of the optical system of the embodiment of the present invention 1:
| Surface markers | Surface type | Radius | Thickness | Y is eccentric | Z is eccentric | Alpha is tilted |
| 111 (diaphragms) | Sphere | Infinitely | 0 | 0 | 0 | |
| 18B | Sphere | -544.88 | 0.000 | 17.777 | 2.6778 | |
| 18C | XY multinomials | -29.95 | 0.071 | 22.410 | -22.481 | |
| 18B | Sphere | -544.88 | 0 | 17.777 | 2.678 | |
| 18A | Sphere | -30.95 | 9.820 | 21.154 | 64.348 | |
| 117 | Sphere | Infinitely | 12.984 | 24.196 | 168.00 | |
| 127 | Sphere | Infinitely | 12.003 | 23.247 | 168.00 | |
| 16C2 | Sphere | -24.70 | 1.023 | 17.380 | 28.413 | 45.758 |
| 16C1 | Sphere | 12.50 | 0.410 | |||
| 16B2 | Sphere | 57.48 | 1.154 | |||
| 16B1 | Sphere | -12.50 | 0.116 | |||
| 16A2 | Sphere | 17.65 | 1.000 | |||
| 16A1 | Sphere | -24.44 | 3.514 | |||
| 15D2 | Sphere | Infinitely | 0.550 | |||
| 15D1 | Sphere | Infinitely | 0.455 | |||
| 15D1 | Sphere | 0.387 | ||||
| 115E | Sphere | 7.69 | 0.545 | |||
| 125E | Sphere | 4.03 | 0.613 | |||
| 15C2 | Sphere | Infinitely | 0.68 | |||
| 15C1 | Sphere | Infinitely | 2.524 | |||
| 14C2 | Sphere | 55.25 | 1.151 | |||
| 14C1 | Sphere | -11.25 | 0.100 | |||
| 14B2 | Sphere | 10.16 | 1.000 | |||
| 14B1 | Sphere | -98.82 | 0.100 | |||
| 14A2 | Sphere | 5.13 | 2.056 | |||
| 14A1 | Sphere | 31.98 | 3.189 | |||
| 112 | Sphere | Infinitely | 0 |
Table 1-1
Wherein face 18C is free form surface, and part surface parameter is as shown in table 1-2
| Parameter item | Surface 18C | |
| K | 0.0000E+00 | |
| C1 | X | 0.0000E+00 |
| C2 | Y | 0.0000E+00 |
| C3 | X2 | 0.00205 |
| C4 | XY | 0.0000E+00 |
| C5 | Y2 | 0.0045 |
| C6 | X3 | 0.0000E+00 |
| C7 | X2Y | 0.00014 |
| C8 | XY2 | 0.0000E+00 |
| C9 | Y3 | 0.0002 |
| C10 | X4 | 1.052e-005 |
| C11 | X3Y | 0.0000E+00 |
| C12 | X2Y2 | 1.814e-005 |
| C13 | XY3 | 0.0000E+00 |
| C14 | Y4 | 1.289e-006 |
| C15 | X5 | 0.0000E+00 |
| C16 | X4Y | -1.241e-007 |
| C17 | X3Y2 | 0.0000E+00 |
| C18 | X2Y3 | -9.671e-006 |
| C19 | XY4 | 0.0000E+00 |
| C20 | Y5 | -6.231e-006 |
| C21 | X6 | 3.867e-008 |
| C22 | X5Y | 0.0000E+00 |
| C23 | X4Y2 | 1.387e-007 |
| C24 | X3Y3 | 0.0000E+00 |
| C25 | X2Y4 | 1.363e-007 |
| C26 | XY5 | 0.0000E+00 |
| C27 | Y6 | 9.256e-007 |
| C28 | X7 | 0.0000E+00 |
| C29 | X6Y | -1.062e-008 |
| C30 | X5Y2 | 0.0000E+00 |
| C31 | X4Y3 | 1.248e-007 |
| C32 | X3Y4 | 0.0000E+00 |
| C33 | X2Y5 | 3.919e-007 |
| C34 | XY6 | 0.0000E+00 |
| C35 | Y7 | 8.368e-008 |
Table 1-2
Embodiment 2：
Figure 10, Figure 11, Figure 12 be respectively the embodiment of the present invention 2+0D, -2D, three diopter states of -8D optical system
Index path, same as Example 1, including image source 212, the first lens group 214, liquid lens 215, the second lens group 216,
And free curved surface prism 218, the first lens group 214 is by two spheric glasses 24A, 24C and one as different from Example 1
Individual double cemented doublet 24B compositions, the second lens group 216 are made up of four spheric glasses 26A, 26B, 26C, 26D；In this example
In, free curved surface prism includes two free form surfaces.
Likewise, the right side of the free curved surface prism 218 can also increase by a compensating prism 219.The free form surface
The right lateral surface of prism 218 is coated with spectro film, and a part of light reflects through film layer, and part in addition transmits through film layer.The benefit
Repay together with prism 219 is joined by gluing with the free curved surface prism 218 so that ambient 2110 can with aberrationless
By the compensating prism 219 and free curved surface prism 218, human eye is reached.
Table 2-1 exemplarily lists the partial optical structural parameters of the optical system of the embodiment of the present invention 2
Table 2-1
Wherein face 28A, 28C surfaces face type is free form surface, and part surface parameter is as shown in table 2-2
Table 2-2
Embodiment 3：
Figure 13 is index path of the embodiment of the present invention 3 in the optical system of+0D diopter states, same as Example 2, including
Image source 312, the first lens group 314, liquid lens 315, the second lens group 316, and free curved surface prism 318.With implementation
Unlike example 1 and 2, between the first lens group 314 and liquid lens 315, a speculum 3111 is also placed, is received from first
The image light 313 that lens group 314 transmits, and image light 313 is reflexed into liquid lens 315 so that the first lens group 314,
The lens group 316 of liquid lens 315 and second is arranged in the form of catadioptric.The light path design of such Zigzag type can further contract
Space needed for short formation intermediate image plane shared by optical element.
Likewise, the right side of the free curved surface prism 318 can also increase by a compensating prism 319.The free form surface
The right lateral surface of prism 318 is coated with spectro film, and a part of light reflects through film layer, and part in addition transmits through film layer.The benefit
Repay together with prism 319 is joined by gluing with the free curved surface prism 318 so that ambient 3110 can with aberrationless
By the compensating prism 319 and free curved surface prism 318, human eye is reached.
According to the various embodiments described above of the present invention, by the control of non-mechanical, realize to optical system of the present invention
Formed virtual image distance, which is realized, to be controlled, and adapts to the diopter or vision accommodation/training requirement of different users.Although each embodiment
In using liquid lens as exemplary description, but skilled artisan understands that, it is possible to achieve the element not limited to this of regulation,
Any liquid lens that can change in the equal alternate embodiments of adjustable component that image light is in intermediate image position, it is such
Adjustable component is by automatically controlled or pressure control regulative mode so as to the change of pre-defined rule occur by its wavefront, so as to change
The position that intermediate image plane is formed, amplification system by visual observation, such as the free curved surface prism in above-mentioned embodiment, you can in user
The amplification virtual image of certain virtual image distance is seen during observation.
According to the first lens group of the present invention, as foregoing embodiments show that data embody, focal length f18mm can be selected from
<f1<Value in the smaller ranges of 14mm mono-, so as to realize that the focal length f of whole intermediate image plane forming apparatus is adjusted by adjustable component
In 11mm<f<Change in 31mm；Meanwhile according to the present invention the second lens group, as foregoing embodiments show data embody,
With relatively small axial length d2, meet 5mm<d2<9mm, so that the position of intermediate image plane is not moved in excessive scope
It is dynamic, beneficial to the determination of follow-up visually amplifier element object plane.
For the visual image amplifier element that free curved surface prism is formed, due to intermediate image plane, image source be present
Range of choice expanded, in addition to the miniature OLED display, Micro-LED displays except emissive type, also can use DLP,
The miniscopes such as LCoS, LCD.Other visual image amplifier elements can also be used, such as including by multiple rotational symmetry
Sphere or aspherical composition, coaxial eyepiece is formed with intermediate image plane, but it is preferable that can using the mode of free curved surface prism
Greatly to reduce volume.In general, the focal length that single liquid lens can provide, which changes, to be limited in scope, thus uses multiple liquid
Lens by improve regulating power be it is selectable in a manner of one of, but not limited to this uses and provides bigger zooming range
Alvarez lens are also one of optional mode.
Visually observed and adapted to conventional user, the optical imaging system with quick diopter adjustment function of the invention
It can preferably adjust in the range of -8D to+5D diopter, preferably be designed apart from regulating power for the virtual image under negative diopter
For more than the virtual image forming under positive diopter apart from regulating power so that user is observed to the clearly empty of image source amplification
Picture, for the optical system of the present invention, focal length variations and the diopter change of liquid lens are in the relation of substantial linear.
According to the mode on virtual image distance, i.e. diopter adjustment of the present invention, the present invention is set to can be not only used for AR, VR etc.
Virtual display, it can also be used to accurate eyesight simulated training, the experiment of chronic correcting vision etc..If likewise, in micro-display
Opening position places object under test, and in the case where there is enough light intensity irradiations, the light that object under test is sent can be by the optical system of the present invention
Detected, so as to realize the amplifying observation of measuring targets, portable microscopic observation equipment can be realized based on this, put
The quality efficiency of big imaging is better than the magnifying glass of general coaxial design；Can be as portable when object under test behaviour body mechanism
Medical Devices, such as observe the Portable fundus camera of retina.
Above content is to combine specific preferred embodiment further description made for the present invention, it is impossible to is assert
The embodiment of the present invention is only limitted to this, for general technical staff of the technical field of the invention, is not taking off
On the premise of from present inventive concept, some simple deduction or replace can also be made, should be all considered as belonging to by institute of the present invention
The protection domain that claims of submission determine.
Claims (10)
1. a kind of optical system that quick diopter adjustment can be achieved, including, intermediate image plane forming apparatus and visual image amplification member
Part；
Wherein, the intermediate image plane forming apparatus is first to amplify in the visual image to receive the image light from image source
The light entrance face of part forms intermediate image plane, and the visual image amplifier element makes will be imported by the image light of intermediate image plane
User's eyes are to form the virtual image of amplification；
The intermediate image plane forming apparatus includes an at least adjustable component, and the adjustable component is adjusted by automatically controlled or pressure control
Section mode is so as to the change of pre-defined rule occur by its wavefront, so that diopter of the optical system to user's eyes
Realize quick regulation.
2. optical system as claimed in claim 1, it is characterised in that the intermediate image plane forming apparatus includes the first lens group,
Liquid lens and the second lens group, wherein,
First lens group is used to directly receive the image light from image source；
Described image light forms intermediate image plane after the first lens group, liquid lens and the second lens group successively.
3. optical system as claimed in claim 2, it is characterised in that
First lens group includes three spherical lenses；
Second lens group includes three spherical lenses；
First lens group, liquid lens and the coaxial arrangement of the second lens group.
4. optical system according to claim 2, it is characterised in that：
First lens group or the second lens group be any to comprise at least an aspherical or free form surface, first lens group,
Liquid lens and the second lens group are placed using catadioptric form.
5. such as optical system any claim 1-4, it is characterised in that the visual image amplifier element includes at least one certainly
By curved surface prism, set relative to the intermediate image plane so that by the image light of the intermediate image plane from the free form surface
The upper surface of prism is incident, successively through prism after free curved surface prism left-hand face total reflection, right lateral surface reflection
Left-hand face outgoing enters user's eyes.
6. optical system according to claim 5, it is characterised in that：
The right lateral surface of the free curved surface prism is free form surface, the face type of the left-hand face and upper surface be selected from sphere,
One of aspherical or free form surface.
7. optical system as claimed in claim 5, it is characterised in that the visual image amplifier element also includes another freedom
Curved surface prism, another free curved surface prism are located on the right side of the free curved surface prism, as compensating prism to cause the external world
Light can with aberrationless pass through another free curved surface prism and the free curved surface prism.
8. optical system as claimed in claim 7, wherein compensation with the outer surface face type of free form surface compensating prism with it is described
The left-hand face of free curved surface prism is different, realizes ambient being corrected to regarding required for user's human eye to coordinate
Degree.
9. optical system as claimed in claim 1, the visual image amplifier element include by multiple rotational symmetry spheres or
The eyepiece of aspherical composition.
10. optical system as claimed in claim 1, wherein the position of the intermediate image plane can be adjusted to adjust virtual image planes
Display distance.
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| CN201710959388.1A CN107656371A (en) | 2017-10-16 | 2017-10-16 | Optical system with diopter adjustment function |
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| CN111399321A (en) * | 2020-05-08 | 2020-07-10 | 北京耐德佳显示技术有限公司 | Small-size projection optical assembly and projection optical system suitable for near-eye display |
| CN114354136A (en) * | 2021-12-28 | 2022-04-15 | 北京耐德佳显示技术有限公司 | Virtual image distance testing device and method based on liquid lens and storage medium |
| CN114427954A (en) * | 2021-12-28 | 2022-05-03 | 北京耐德佳显示技术有限公司 | Device and method for testing visibility of near-to-eye display system and storage medium |
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