CN104932104B - A kind of variable-focus optical system and head-up-display system - Google Patents
A kind of variable-focus optical system and head-up-display system Download PDFInfo
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- CN104932104B CN104932104B CN201510300548.2A CN201510300548A CN104932104B CN 104932104 B CN104932104 B CN 104932104B CN 201510300548 A CN201510300548 A CN 201510300548A CN 104932104 B CN104932104 B CN 104932104B
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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
- G02B17/00—Systems with reflecting surfaces, with or without refracting elements
- G02B17/08—Catadioptric systems
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Abstract
The present invention provides a kind of variable-focus optical system and head-up-display system, the any group of eyeglass that the variable-focus optical system is included in luminescent screen, lens, secondary mirror and principal reflection mirror, the lens, secondary mirror or principal reflection mirror can be along the movable focal length to adjust the variable-focus optical system of optical axis.A kind of head-up-display system includes above-mentioned variable-focus optical system, also include speed acquiring module and focus adjustment module, the speed information that the focus adjustment module can be got according to speed acquiring module adjusts the focal length of the optical system or the focal length of the variable-focus optical system is moved according to user's request hand adjustment section in real time.The present invention can efficiently reduce driver defocus and blurred vision because of caused by speed change sight focus movement.
Description
Technical field
The present invention relates to a kind of optical system, more particularly to a kind of variable-focus optical system and head-up-display system.
Background technology
New line display optical system (HUD) has been widely used in car-mounted display now, and its effect is before human eye
Side place several meters remote is presented a virtual image, human eye while front road conditions are seen clearly it can be seen that thing in display, this
Sample can efficiently reduce the time that observation instrument board and GPS are wasted.
HUD systems at present on the market are to focus optical system, i.e. virtual image position is motionless, and such product has one
Individual shortcoming：Due to driver, the focal distance of eyes is changed with the change of speed when driving, and speed is faster
The focal distance of human eye is more remote, and HUD virtual images position is motionless, and human eye is easy to when shift the focus due to virtual image defocus
And cause blurred vision.
The content of the invention
In view of the above problems, it is above-mentioned to solve the invention provides a kind of variable-focus optical system and head-up-display system
Problem solves the above problems at least in part.
The invention provides a kind of variable-focus optical system, the variable-focus optical system along beam projecting direction successively
Including：Luminescent screen, lens, secondary mirror and principal reflection mirror；
The lens, are adapted to correct for the direction of the emergent ray of the luminescent screen, and the light after correction are shone described
In secondary mirror；
The secondary mirror, suitable for being shone after the light shone thereon is reflected on the principal reflection mirror；
The principal reflection mirror, suitable for reflecting and converging the light shone thereon；
Wherein, any group of eyeglass in the lens, secondary mirror or principal reflection mirror can along optical axis it is movable with
Adjust the focal length of the variable-focus optical system.
Alternatively, the lens are the Fresnel Lenses with positive light coke, and it is towards the one side of the secondary mirror
Fresnel surface, another side is aspherical for concave surface.
Alternatively, the material of the lens is zk7 optical glass.
Alternatively, the secondary mirror is the plane mirror without focal power.
Alternatively, the principal reflection mirror is the transparent concave mirror with positive light coke.
Alternatively, the face type of the principal reflection mirror is quadratic surface, and quadric center has one relative to optical axis
Fixed offset distance.
A kind of head-up-display system, including the variable-focus optical system described in any of the above-described.
Alternatively, the head-up-display system also includes speed acquiring module and focus adjustment module,
The speed acquiring module, the speed information for obtaining vehicle in real time；
The focus adjustment module, the vehicle present speed for being got according to the speed acquiring module is adjusted in real time
The focal length of the variable-focus optical system, with change the head-up-display system into the position of the virtual image.
Alternatively, the focus adjustment module, it is current specifically for the vehicle that is got according to the speed acquiring module
Speed adjusts the distance between lens and luminescent screen in the variable-focus optical system in real time.
Alternatively, the focus adjustment module, is additionally operable to user and adjusts the variable-focus optical system manually according to demand
Focal length.
The beneficial effects of the invention are as follows：
A kind of variable-focus optical system that the present invention is provided, includes successively along beam projecting direction：Luminescent screen, lens,
Secondary mirror and principal reflection mirror, because any group of eyeglass in lens, secondary mirror or principal reflection mirror can be along before and after optical axis
It is mobile, therefore the focus adjustable section of the optical system.
In the head-up-display system that the variable-focus optical system of the present invention is applied to the present invention, one kind that the present invention is provided
Head-up-display system, the speed information of vehicle is obtained by speed acquiring module in real time, because the slower image planes of speed are nearer, speed
Faster image planes are more remote, adjust Jiao of the variable-focus optical system in real time according to vehicle present speed by focus adjustment module
Away from for example zoom can be realized by adjusting the distance between the lens in the optical system and luminescent screen in real time, so as to change
Become the head-up-display system into the position of the virtual image, can so efficiently reduce driver because speed change sight focus is moved
Defocus and blurred vision caused by dynamic.
Brief description of the drawings
Fig. 1 is the index path of the variable-focus optical system of the embodiment of the present invention；
Fig. 2 is the optical parametric of the variable-focus optical system of the embodiment of the present invention；
Fig. 3 is transfer curve of the variable-focus optical system of the embodiment of the present invention under focal length 123mm；
Fig. 4 is the point range figure of the variable-focus optical system of the embodiment of the present invention；
Fig. 5 is the multiplet parameter of the variable-focus optical system of the embodiment of the present invention；
Fig. 6 is the new line display optical system schematic diagram of the embodiment of the present invention；
In figure：11st, luminescent screen；12nd, lens；13rd, secondary mirror；14th, principal reflection mirror；15th, human eye pupil.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to embodiment party of the present invention
Formula is described in further detail.
Fig. 1 shows the schematic diagram of variable-focus optical system according to embodiments of the present invention.As shown in figure 1, along light
Exit direction, the variable-focus optical system includes successively：Luminescent screen 11, lens 12, secondary mirror 13 and principal reflection mirror 14.
Lens 12 are adapted to correct for the direction of the emergent ray of luminescent screen 1, and the light after correction is shone into secondary mirror 13
On.Secondary mirror 13 is suitable to shine on principal reflection mirror 14 after the light shone thereon is reflected.Principal reflection mirror 14 is suitable to go out
The light being mapped to thereon is reflected at human eye pupil 15 and pools picture.
Wherein, any group of eyeglass in lens 12, secondary mirror 13 or principal reflection mirror 14 can be movable along optical axis,
To change the focal length of the optical system.
Fig. 2 is the optical parametric of the variable-focus optical system of the embodiment of the present invention, shows each optical surface on optical axis
Radius of curvature (Radius)；Thickness (Thickness) between each optical surface and adjacent next optical surface；Each optics
Material (Glass), bore (Semi-diameter) and the quadratic surface coefficient (Conic) of element.Preferably, lens 12 are tool
There is the Fresnel Lenses of positive light coke, lens 12 are Fresnel surface towards the one side of secondary mirror 13, and another side is aspherical.
In one embodiment, the face type radius of Fresnel surface is 33.8mm, and material is zk7 optical glass, aspherical to be
Concave surface, radius is 144.5mm.
Preferably, secondary mirror 13 is 100% speculum, and is the plane mirror without focal power.Secondary mirror 13
Main function is light path shortening system length of turning back, and makes system compacter.
Preferably, principal reflection mirror 14 is concave mirror transparent, with positive light coke.In one embodiment, it is main
The face type of speculum 14 is quadratic surface, and quadratic surface coefficient is 0.581, and radius is 400mm.The center of principal reflection mirror 14 relative to
Light shaft offset 55mm.
In one embodiment, the scope of activities of human eye pupil 15 is 130mm*65mm, the catercorner length of luminescent screen 11
For 10.8mm, projector distance is 2m to 5m, the angle of visual field be 8 ° of level, vertical 4 °.
When the focal length of the variable-focus optical system is 123mm, the distance of lens 12 and luminescent screen 11 is 6.9mm, now
Virtual image position is 2mm.Virtual image distance is such as allowed to become remote, a kind of embodiment is to increase the spacing between lens 12 and luminescent screen 11, example
Such as when increasing the distance between lens 12 and luminescent screen 11 to 21.5mm, virtual image position is 5m, now the varifocal optical system
The focal length of system is 141mm.
Fig. 3 is transfer curve of the variable-focus optical system of the embodiment of the present invention under focal length 123mm.Transmission function
Curve can be with the image quality of concentrated expression system, and its curve shape is more smooth, and relative X-axis height is higher, it was demonstrated that system
Image quality is better.Different curves represent each field rays respectively in Fig. 3, and T represents the transfer curve of meridian direction, S
The transfer curve in sagitta of arc direction is represented, as seen from Figure 3, curve more compact smooth, and the transmission that curve is characterized
Function value is higher, and explanation system has good image quality.
Fig. 4 is the point range figure of the variable-focus optical system of the embodiment of the present invention.The each of optical system is shown in point range figure
Individual field rays disc of confusion formed by convergence at image planes, the various aberration characteristics that sign system is obtained, disc of confusion disperses
The aberration for system of more making out a certificate is bigger.The RMS radiuses of point range figure are an important radius parameters, and it is each point seat of disc of confusion
After mark, the coordinate quadratic sum that reference center point is carried out, divided by the value of quantity, then evolution is put, the radius of this value can reflect
The size of one typical disc of confusion, with the quantitative spot size for reflecting that this system is actual.The smaller proof system of RMS radiuses
Image quality it is better.As seen from Figure 4, disc of confusion distribution is compact, and the image quality of the system is preferable.
Fig. 5 for the variable-focus optical system of the embodiment of the present invention multiplet parameter, by mobile secondary mirror 13 its
With the distance of luminescent screen 11, different focal lengths are simulated.The first row data represent virtual image position and the oculopupillary distance of people in figure, the
The center of straight line where two row data represent left and right human eye pupil is respectively to the oculopupillary distance of left and right people, and the third line data are represented
The angle that left and right human eye pupil is rotated, fourth line data represent the distance between luminescent screen 11 and secondary mirror 3.Can be with by Fig. 5
Find out, luminescent screen 11 and the distance between secondary mirror 13 are smaller, virtual image position and the oculopupillary distance of people are bigger, the optical system
The focal length of system is bigger.
The operation principle of the variable-focus optical system of the embodiment of the present invention is：Under the mutual cooperation of each optical element,
Light after the outgoing of luminescent screen 11, by the correction of lens 12, the total reflection of secondary mirror 13, principal reflection mirror 14 it is further
Human eye pupil 15 is incided after convergence reflection, a virtual image is formed on the light reverse extending line for entering human eye pupil 15.It is logical
Cross along optical axis move forward and backward lens 12, secondary mirror 13 or principal reflection mirror 14 in any group of eyeglass, realize to it is described can
The focus adjustment of varifocal optical system.From the foregoing, the variable-focus optical system that the present invention is provided, due to lens, secondary reflection
Any group of eyeglass in mirror or principal reflection mirror can be movable along optical axis, therefore the focus adjustable section of the optical system.
Fig. 6 is the new line display optical system schematic diagram of the embodiment of the present invention.The head-up-display system of the embodiment of the present invention
6, including above-mentioned variable-focus optical system 61, speed acquiring module 61 and focus adjustment module 62, wherein speed acquiring module
61 are used for the speed information of acquisition vehicle in real time, focus adjustment module 62, for being got according to the speed acquiring module 61
Vehicle present speed, any group of eyeglass in regulation lens 12, secondary mirror 13 or principal reflection mirror 14 is along optical axis in real time
Front and back position, in real time regulation variable-focus optical system focal length so that change the head-up-display system into the position of the virtual image.
A kind of preferred embodiment, the focus adjustment module 62, specifically for being obtained according to the speed acquiring module 61
To vehicle present speed adjust the distance between lens 12 in the variable-focus optical system 61 and luminescent screen 11 in real time.
Alternatively, the focus adjustment module 62, is additionally operable to user such as speed requirement or vision according to the actual requirements
Demand, adjusts the focal length of the optical system 61 manually, for example, adjust lens, secondary reflection in the variable-focus optical system 61
The front and back position of any group of eyeglass in mirror or principal reflection mirror, with the preset head-up-display system into the position of the virtual image.
From the above mentioned, the variable-focus optical system of the present invention is applied in head-up-display system, the lift that the present invention is provided
Head shows system, obtains the speed information of vehicle in real time by speed acquiring module, because the slower image planes of speed are nearer, speed is got over
Fast image planes are more remote, adjust the focal length of the variable-focus optical system in real time according to vehicle present speed by focus adjustment module,
For example the zoom of optical system can be realized by adjusting the distance between the lens in the optical system and luminescent screen in real time,
So as to change the head-up-display system institute into the position of the virtual image, can so efficiently reduce driver because speed change sight
Defocus and blurred vision caused by focus movement.
Embodiments of the present invention are the foregoing is only, are not intended to limit the scope of the present invention.It is all in the present invention
Spirit and principle within any modification, equivalent substitution and improvements, the extension made etc., be all contained in protection scope of the present invention
It is interior.
Claims (9)
1. a kind of variable-focus optical system, it is characterised in that the variable-focus optical system is wrapped successively along beam projecting direction
Include：Luminescent screen, lens, secondary mirror and principal reflection mirror；
The lens, are adapted to correct for the direction of the emergent ray of the luminescent screen, and the light after correction is shone into described time instead
Penetrate on mirror；
The secondary mirror, suitable for being shone after the light shone thereon is reflected on the principal reflection mirror；
The principal reflection mirror, suitable for reflecting and converging the light shone thereon；
Wherein, any group of eyeglass in the lens, secondary mirror or principal reflection mirror can be movable with regulation along optical axis
The focal length of the variable-focus optical system；
The angle of visual field of the luminescent screen be 8 ° of level, vertical 4 °；
The secondary mirror is the plane mirror without focal power；
The face type of the principal reflection mirror is quadratic surface, and quadratic surface coefficient is 0.581.
2. variable-focus optical system according to claim 1, it is characterised in that the lens are the phenanthrene with positive light coke
Nie Er lens, it is Fresnel surface towards the one side of the secondary mirror, and another side is aspherical for concave surface.
3. variable-focus optical system according to claim 2, it is characterised in that the material of the lens is zk7 optics glass
Glass.
4. the variable-focus optical system according to claim any one of 1-3, it is characterised in that the principal reflection mirror is transparent
The concave mirror with positive light coke.
5. variable-focus optical system according to claim 4, it is characterised in that the quadratic surface of the principal reflection mirror
Center have certain offset distance relative to optical axis.
6. a kind of head-up-display system, it is characterised in that the head-up-display system is included described in claim any one of 1-5
Variable-focus optical system.
7. head-up-display system according to claim 6, it is characterised in that the head-up-display system is also obtained including speed
Modulus block and focus adjustment module,
The speed acquiring module, the speed information for obtaining vehicle in real time；
The focus adjustment module, for described in the vehicle present speed that is got according to the speed acquiring module in real time regulation
The focal length of variable-focus optical system, with change the head-up-display system into the position of the virtual image.
8. head-up-display system according to claim 7, it is characterised in that the focus adjustment module, specifically for root
The vehicle present speed got according to the speed acquiring module adjusts lens and hair in the variable-focus optical system in real time
The distance between optical screen.
9. head-up-display system according to claim 8, it is characterised in that the focus adjustment module, is additionally operable to user
Adjust the focal length of the variable-focus optical system manually according to demand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510300548.2A CN104932104B (en) | 2015-06-03 | 2015-06-03 | A kind of variable-focus optical system and head-up-display system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510300548.2A CN104932104B (en) | 2015-06-03 | 2015-06-03 | A kind of variable-focus optical system and head-up-display system |
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| CN104932104A CN104932104A (en) | 2015-09-23 |
| CN104932104B true CN104932104B (en) | 2017-08-04 |
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| JP6363576B2 (en) * | 2015-09-29 | 2018-07-25 | 富士フイルム株式会社 | Head-up display device |
| WO2017061019A1 (en) * | 2015-10-09 | 2017-04-13 | 日立マクセル株式会社 | Head-up display device |
| EP3696597A1 (en) * | 2016-05-11 | 2020-08-19 | Wayräy Ag | Heads-up display with variable image plane |
| CN106125306A (en) * | 2016-06-28 | 2016-11-16 | 科世达（上海）管理有限公司 | A kind of head-up-display system, vehicle control system and vehicle |
| CN108459411A (en) | 2017-02-20 | 2018-08-28 | 上海蔚兰动力科技有限公司 | Head up display and means of transport |
| CN107219635B (en) * | 2017-06-28 | 2023-12-26 | 歌尔光学科技有限公司 | Naked eye three-dimensional display, head-up display system and implementation method thereof |
| CN109212753B (en) * | 2017-07-06 | 2021-01-29 | 京东方科技集团股份有限公司 | Head-up display system with variable display distance, head-up display method and driving equipment |
| WO2019127224A1 (en) * | 2017-12-28 | 2019-07-04 | 深圳市大疆创新科技有限公司 | Focusing method and apparatus, and head-up display device |
| CN108769637A (en) * | 2018-05-11 | 2018-11-06 | 宁波中车时代传感技术有限公司 | Train department control system head-up display device based on DLP technologies |
| JP7026325B2 (en) * | 2018-06-21 | 2022-02-28 | パナソニックＩｐマネジメント株式会社 | Video display system, video display method, program, and mobile |
| CN108873367A (en) | 2018-06-29 | 2018-11-23 | 京东方科技集团股份有限公司 | A kind of assistant display device and auxiliary display method based on vehicle drive |
| CN109239729B (en) * | 2018-09-28 | 2024-05-28 | 北京理工大学 | Unmanned variable-view-field solid-state area array laser radar ranging system and method |
| CN110626268A (en) * | 2019-09-20 | 2019-12-31 | 中国第一汽车股份有限公司 | Automobile head-up display device |
| CN114326118A (en) * | 2020-05-15 | 2022-04-12 | 华为技术有限公司 | Multi-focus image generation device, head-up display device, and related method and equipment |
| CN112255788A (en) * | 2020-09-29 | 2021-01-22 | 江苏泽景汽车电子股份有限公司 | Hud image adjusting method without turning over reflector |
| CN112639581B (en) * | 2020-10-31 | 2022-09-02 | 华为技术有限公司 | Head-up display and head-up display method |
| CN117706790B (en) * | 2024-02-05 | 2024-05-24 | 奥琳光学科技(苏州)有限公司 | Virtual reality equipment and peripheral retina defocus adjustment method |
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Effective date of registration: 20201016 Address after: 261031 north of Yuqing street, east of Dongming Road, high tech Zone, Weifang City, Shandong Province (Room 502, Geer electronic office building) Patentee after: GoerTek Optical Technology Co.,Ltd. Address before: International Exhibition Center of wealth 18 No. 266061 Shandong province Qingdao city Laoshan District No. 3 Qinling Mountains Road, building 5 floor Patentee before: Qingdao GoerTek Technology Co.,Ltd. |
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