CN104932104A - Variable-focus optical system and head-up display system - Google Patents
Variable-focus optical system and head-up display system Download PDFInfo
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- CN104932104A CN104932104A CN201510300548.2A CN201510300548A CN104932104A CN 104932104 A CN104932104 A CN 104932104A CN 201510300548 A CN201510300548 A CN 201510300548A CN 104932104 A CN104932104 A CN 104932104A
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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
Abstract
The invention provides a variable-focus optical system and a head-up display system. The variable-focus optical system comprises a luminescent screen, a lens, a secondary mirror and a primary mirror, wherein any one of the lens, the secondary mirror and the primary mirror can move back and forth along an optical axis so as to adjust the focal length of the variable-focus optical system. The head-up display system comprises the variable-focus optical system. The head-up display system further comprises a speed acquisition module and a focal length adjustment module, the focal length of the optical system can be adjusted in real time by the focal length adjustment module according to vehicle speed information acquired by the speed acquisition module, or the focal length of the variable-focus optical system is manually adjusted according to user requirements. The variable-focus optical system and the head-up display system can effectively reduce defocus and blurred vision of a driver caused by vehicle speed variation and focus movement.
Description
Technical field
The present invention relates to a kind of optical system, particularly relate 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, its effect presents a virtual image in the place that several meters, human eye front is far away, human eye also can see the thing in display while seeing front road conditions clearly, effectively can reduce the time that scope dial plate and GPS waste like this.
Current HUD system is on the market and focuses optical system, namely virtual image position is motionless, such product has a shortcoming: because the focusing of driver's eyes when driving changes from the change along with the speed of a motor vehicle, the focusing of the faster human eye of the speed of a motor vehicle is from away from more, and HUD virtual image position is motionless, human eye is easy to cause blurred vision when shift the focus due to virtual image out of focus.
Summary of the invention
In view of the above problems, the invention provides a kind of variable-focus optical system and head-up-display system, to solve the problem or to solve the problem at least in part.
The invention provides a kind of variable-focus optical system, described variable-focus optical system comprises successively along beam projecting direction: luminescent screen, lens, secondary mirror and principal reflection mirror;
Described lens, are suitable for the direction of the emergent ray correcting described luminescent screen, and shine in described secondary mirror by the light after correcting;
Described secondary mirror, is suitable for shining on described principal reflection mirror after the light shone on it reflection;
Described principal reflection mirror, is suitable for being reflected by the light shone on it and converging;
Wherein, the arbitrary arrangement of mirrors sheet in described lens, secondary mirror or principal reflection mirror can move forward and backward along optical axis the focal length regulating described variable-focus optical system.
Alternatively, described lens are the Fresnel Lenses with positive light coke, and its one side towards described secondary mirror is Fresnel surface, and another side is the aspheric surface of concave surface.
Alternatively, the material of described lens is zk7 optical glass.
Alternatively, described secondary mirror is the plane mirror without focal power.
Alternatively, described principal reflection mirror is the transparent concave mirror with positive light coke.
Alternatively, the face type of described principal reflection mirror is quadric surface, and there is certain offset distance at described quadric center relative to optical axis.
A kind of head-up-display system, comprises the variable-focus optical system described in above-mentioned any one.
Alternatively, described head-up-display system also comprises speed acquiring module and focus adjustment module,
Described speed acquiring module, for the speed information of Real-time Obtaining vehicle;
Described focus adjustment module, the vehicle present speed for getting according to described speed acquiring module regulates the focal length of described variable-focus optical system in real time, with change described head-up-display system become the position of the virtual image.
Alternatively, described focus adjustment module, the vehicle present speed specifically for getting according to described speed acquiring module regulates the distance between lens in described variable-focus optical system and luminescent screen in real time.
Alternatively, described focus adjustment module, also for the focal length of user's variable-focus optical system described in manual adjustments according to demand.
The invention has the beneficial effects as follows:
A kind of variable-focus optical system provided by the invention, comprise successively along beam projecting direction: luminescent screen, lens, secondary mirror and principal reflection mirror, because the arbitrary arrangement of mirrors sheet in lens, secondary mirror or principal reflection mirror can move forward and backward along optical axis, the therefore focus adjustable joint of this optical system.
Variable-focus optical system of the present invention is applied in head-up-display system of the present invention, a kind of head-up-display system provided by the invention, the speed information of Negotiation speed acquisition module Real-time Obtaining vehicle, because the slower image planes of the speed of a motor vehicle are nearer, the faster image planes of the speed of a motor vehicle are far away, regulated the focal length of described variable-focus optical system in real time according to vehicle present speed by focus adjustment module, such as by regulating the distance between the lens in described optical system and luminescent screen to realize zoom in real time, thus change described head-up-display system become the position of the virtual image, can effectively reduce like this driver because the speed of a motor vehicle change sight line Focal Point Shift out of focus that causes and blurred vision.
Accompanying drawing explanation
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 the transfer curve of variable-focus optical system under focal length 123mm of the embodiment of the present invention;
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: 11, luminescent screen; 12, lens; 13, secondary mirror; 14, principal reflection mirror; 15, human eye pupil.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
Fig. 1 shows the schematic diagram of the variable-focus optical system according to the embodiment of the present invention.As shown in Figure 1, along beam projecting direction, this variable-focus optical system comprises successively: luminescent screen 11, lens 12, secondary mirror 13 and principal reflection mirror 14.
Lens 12 are suitable for the direction of the emergent ray correcting luminescent screen 1, and are shone in secondary mirror 13 by the light after correcting.Secondary mirror 13 is suitable for shining after the light shone on it reflection on principal reflection mirror 14.Principal reflection mirror 14 is suitable for the light shone on it being reflected in human eye pupil 15 place and pools picture.
Wherein, the arbitrary arrangement of mirrors sheet in lens 12, secondary mirror 13 or principal reflection mirror 14 can move forward and backward along optical axis, to change the focal length of described optical system.
Fig. 2 is the optical parametric of the variable-focus optical system of the embodiment of the present invention, shows the radius-of-curvature (Radius) of each optical surface on optical axis; Thickness (Thickness) between each optical surface and adjacent next optical surface; The material (Glass) of each optical element, bore (Semi-diameter) and quadric surface coefficient (Conic).Preferably, lens 12 are for having the Fresnel Lenses of positive light coke, and lens 12 are Fresnel surface towards the one side of secondary mirror 13, and another side is aspheric surface.
In one embodiment, the face type radius of Fresnel surface is 33.8mm, and material is zk7 optical glass, and aspheric surface is concave surface, and radius is 144.5mm.
Preferably, secondary mirror 13 is 100% catoptron, and is the plane mirror without focal power.The Main Function of secondary mirror 13 is light path shortening system length of turning back, and makes system compacter.
Preferably, principal reflection mirror 14 is concave mirrors that are transparent, that have positive light coke.In one embodiment, the face type of principal reflection mirror 14 is quadric surface, and quadric surface coefficient is 0.581, and radius is 400mm.Principal reflection mirror 14 center is relative to light shaft offset 55mm.
In one embodiment, the scope of activities of human eye pupil 15 is 130mm*65mm, and the catercorner length of luminescent screen 11 is 10.8mm, and projector distance is 2m to 5m, field angle be level 8 °, vertical 4 °.
When the focal length of this variable-focus optical system is 123mm, lens 12 are 6.9mm with the distance of luminescent screen 11, and now virtual image position is 2mm.As allowed virtual image distance become far away, a kind of embodiment increases the spacing between lens 12 and luminescent screen 11, and such as, when increasing the distance between lens 12 and luminescent screen 11 to 21.5mm, virtual image position is 5m, and now the focal length of this variable-focus optical system is 141mm.
Fig. 3 is the transfer curve of variable-focus optical system under focal length 123mm of the embodiment of the present invention.Transfer curve can the image quality of concentrated expression system, and its curve shape is more level and smooth, and X-axis height is higher relatively, and the image quality of proof system is better.In Fig. 3, different curve represents each field rays respectively, T represents the transfer curve of meridian direction, S represents the transfer curve in sagitta of arc direction, as seen from Figure 3, curve is compact smooth comparatively, and the transport function numerical value that Curves characterizes is higher, illustrative 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.Point range figure display be that each field rays of optical system converges at image planes place and the disc of confusion that formed, the various aberration characteristics that characterization system obtains, disc of confusion disperses the aberration of system of more making out a certificate is larger.The RMS radius of point range figure is an important radius parameter, it is each point coordinate of disc of confusion, after the coordinate quadratic sum that reference center point carries out, divided by a quantity, then the value of evolution, the radius of this value can reflect the size of a typical disc of confusion, with the spot size of this system reality of quantitative reflection.The image quality of the less proof system of RMS radius is better.As seen from Figure 4, disc of confusion distribution is compact, and the image quality of this system is better.
Fig. 5 is the multiplet parameter of the variable-focus optical system of the embodiment of the present invention, by the distance of mobile secondary mirror 13 itself and luminescent screen 11, simulates different focal lengths.The first row data representation virtual image position and the oculopupillary distance of people in figure, the center of the second human eye pupil place, row data representation left and right straight line is divided and is clipped to the oculopupillary distance of people from left and right, the angle that the third line data representation left and right human eye pupil rotates, the distance between fourth line data representation luminescent screen 11 and secondary mirror 3.As seen from Figure 5, the distance between luminescent screen 11 and secondary mirror 13 is less, virtual image position and the oculopupillary distance of people larger, the focal length of this optical system is larger.
The principle of work of the variable-focus optical system of the embodiment of the present invention is: under the cooperatively interacting of each optical element, light is after luminescent screen 11 outgoing, after the further convergence reflection of the total reflection of the correction of lens 12, secondary mirror 13, principal reflection mirror 14, incide human eye pupil 15, the light reverse extending line entering human eye pupil 15 forms a virtual image.By moving forward and backward the arbitrary arrangement of mirrors sheet in lens 12, secondary mirror 13 or principal reflection mirror 14 along optical axis, realize the focus adjustment to described variable-focus optical system.From the above, variable-focus optical system provided by the invention, because the arbitrary arrangement of mirrors sheet in lens, secondary mirror or principal reflection mirror can move forward and backward along optical axis, the therefore focus adjustable joint of this 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 6 of the embodiment of the present invention, comprise above-mentioned variable-focus optical system 61, speed acquiring module 61 and focus adjustment module 62, wherein speed acquiring module 61 is for the speed information of Real-time Obtaining vehicle, focus adjustment module 62, for the vehicle present speed got according to described speed acquiring module 61, arbitrary arrangement of mirrors sheet in real-time adjustment lens 12, secondary mirror 13 or principal reflection mirror 14 is along the front and back position of optical axis, the focal length of real-time adjustment variable-focus optical system, thus change this head-up-display system become the position of the virtual image.
A kind of preferred embodiment, described focus adjustment module 62, the vehicle present speed specifically for getting according to described speed acquiring module 61 regulates the distance between lens 12 in described variable-focus optical system 61 and luminescent screen 11 in real time.
Alternatively, described focus adjustment module 62, also for user's such as speed requirement or visual demand according to the actual requirements, the focal length of optical system 61 described in manual adjustments, such as regulate the front and back position of the arbitrary arrangement of mirrors sheet in lens, secondary mirror or principal reflection mirror in described variable-focus optical system 61, with preset described head-up-display system become the position of the virtual image.
From the above mentioned, variable-focus optical system of the present invention is applied in head-up-display system, head-up-display system provided by the invention, the speed information of Negotiation speed acquisition module Real-time Obtaining vehicle, because the slower image planes of the speed of a motor vehicle are nearer, the faster image planes of the speed of a motor vehicle are far away, regulated the focal length of described variable-focus optical system in real time according to vehicle present speed by focus adjustment module, such as by regulating the distance between the lens in described optical system and luminescent screen to realize the zoom of optical system in real time, thus change described head-up-display system become the position of the virtual image, can effectively reduce like this driver because the speed of a motor vehicle change sight line Focal Point Shift out of focus that causes and blurred vision.
The foregoing is only embodiments of the present invention, be not intended to limit protection scope of the present invention.All any amendments done within the spirit and principles in the present invention, equivalent replacement, improvement, expansion etc., be all included in protection scope of the present invention.
Claims (10)
1. a variable-focus optical system, is characterized in that, described variable-focus optical system comprises successively along beam projecting direction: luminescent screen, lens, secondary mirror and principal reflection mirror;
Described lens, are suitable for the direction of the emergent ray correcting described luminescent screen, and shine in described secondary mirror by the light after correcting;
Described secondary mirror, is suitable for shining on described principal reflection mirror after the light shone on it reflection;
Described principal reflection mirror, is suitable for being reflected by the light shone on it and converging;
Wherein, the arbitrary arrangement of mirrors sheet in described lens, secondary mirror or principal reflection mirror can move forward and backward along optical axis the focal length regulating described variable-focus optical system.
2. variable-focus optical system according to claim 1, is characterized in that, described lens are the Fresnel Lenses with positive light coke, and its one side towards described secondary mirror is Fresnel surface, and another side is the aspheric surface of concave surface.
3. variable-focus optical system according to claim 2, is characterized in that, the material of described lens is zk7 optical glass.
4. variable-focus optical system according to claim 1, is characterized in that, described secondary mirror is the plane mirror without focal power.
5. the variable-focus optical system according to any one of claim 1-4, is characterized in that, described principal reflection mirror is the transparent concave mirror with positive light coke.
6. variable-focus optical system according to claim 5, is characterized in that, the face type of described principal reflection mirror is quadric surface, and there is certain offset distance at described quadric center relative to optical axis.
7. a head-up-display system, is characterized in that, described head-up-display system comprises the variable-focus optical system described in any one of claim 1-6.
8. head-up-display system according to claim 7, is characterized in that, described head-up-display system also comprises speed acquiring module and focus adjustment module,
Described speed acquiring module, for the speed information of Real-time Obtaining vehicle;
Described focus adjustment module, the vehicle present speed for getting according to described speed acquiring module regulates the focal length of described variable-focus optical system in real time, with change described head-up-display system become the position of the virtual image.
9. head-up-display system according to claim 8, it is characterized in that, described focus adjustment module, the vehicle present speed specifically for getting according to described speed acquiring module regulates the distance between lens in described variable-focus optical system and luminescent screen in real time.
10. head-up-display system according to claim 9, is characterized in that, described focus adjustment module, also for the focal length of user's variable-focus optical system described in manual adjustments according to demand.
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| 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 |
| CN106802481A (en) * | 2015-09-29 | 2017-06-06 | 富士胶片株式会社 | Head-up display |
| CN107219635A (en) * | 2017-06-28 | 2017-09-29 | 歌尔股份有限公司 | Naked eye three-dimensional display, head-up-display system and its implementation |
| 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 |
| CN109076201A (en) * | 2017-12-28 | 2018-12-21 | 深圳市大疆创新科技有限公司 | Focus adjustment method, device and head-up display device |
| WO2019006985A1 (en) * | 2017-07-06 | 2019-01-10 | Boe Technology Group Co., Ltd. | Virtual image display apparatus, vehicle comprising head-up display apparatus comprising virtual image display apparatus, and method for virtual image display |
| CN109239729A (en) * | 2018-09-28 | 2019-01-18 | 北京理工大学 | A kind of unmanned change visual field solid-state face battle array laser radar range system and method |
| CN109477967A (en) * | 2016-05-11 | 2019-03-15 | 威瑞股份公司 | Has the head-up-display system of variable focal plane |
| US10281729B2 (en) | 2017-02-20 | 2019-05-07 | Shanghai XPT Technology Limited | Vehicle equipped with head-up display system capable of adjusting imaging distance and maintaining image parameters, and operation method of head-up display system thereof |
| CN110632757A (en) * | 2018-06-21 | 2019-12-31 | 松下知识产权经营株式会社 | Video display system and method, non-transitory recording medium, and moving object |
| 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 |
| CN111198442A (en) * | 2015-10-09 | 2020-05-26 | 麦克赛尔株式会社 | Head-up display device |
| 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 |
| CN112639581A (en) * | 2020-10-31 | 2021-04-09 | 华为技术有限公司 | Head-up display and head-up display method |
| CN113671699A (en) * | 2020-05-15 | 2021-11-19 | 华为技术有限公司 | Multi-focus image generation device, head-up display device, and related method and equipment |
| US11320676B2 (en) | 2018-06-29 | 2022-05-03 | Boe Technology Group Co., Ltd. | Head-up display device and display method thereof |
| CN117706790A (en) * | 2024-02-05 | 2024-03-15 | 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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| CN109076201A (en) * | 2017-12-28 | 2018-12-21 | 深圳市大疆创新科技有限公司 | Focus adjustment method, device 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 |
| CN110632757A (en) * | 2018-06-21 | 2019-12-31 | 松下知识产权经营株式会社 | Video display system and method, non-transitory recording medium, and moving object |
| US11320676B2 (en) | 2018-06-29 | 2022-05-03 | Boe Technology Group Co., Ltd. | Head-up display device and display method thereof |
| CN109239729A (en) * | 2018-09-28 | 2019-01-18 | 北京理工大学 | A kind of unmanned change visual field solid-state face battle array laser radar range 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 |
| CN113671699A (en) * | 2020-05-15 | 2021-11-19 | 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 |
| CN112639581A (en) * | 2020-10-31 | 2021-04-09 | 华为技术有限公司 | Head-up display and head-up display method |
| CN117706790A (en) * | 2024-02-05 | 2024-03-15 | 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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