CN104635333B - A kind of eyepiece, wear eyepiece system and micro display helmet - Google Patents
A kind of eyepiece, wear eyepiece system and micro display helmet Download PDFInfo
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- CN104635333B CN104635333B CN201510042053.4A CN201510042053A CN104635333B CN 104635333 B CN104635333 B CN 104635333B CN 201510042053 A CN201510042053 A CN 201510042053A CN 104635333 B CN104635333 B CN 104635333B
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- positive lens
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B25/00—Eyepieces; Magnifying glasses
- G02B25/001—Eyepieces
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B25/00—Eyepieces; Magnifying glasses
- G02B25/04—Eyepieces; Magnifying glasses affording a wide-angle view, e.g. through a spy-hole
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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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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
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Abstract
The invention discloses a kind of eyepiece, wear eyepiece system and micro display helmet, the eyepiece includes the first positive lens, the second positive lens, the 3rd negative lens that are set gradually along light, and first positive lens has and is convex to the first surface of image space and is convex to the second surface of object space；Second positive lens has and is convex to the 3rd surface of image space and be convex to the 4th surface of object space；3rd negative lens has to concave towards and the 5th surface of image space and concaves towards the 6th surface of object space.The reasonable design spherical glass of optical system of the technical program, the lens combination of plastic aspherical element, while the big angle of visual field is obtained, thoroughly correct the aberrations such as ratio chromatism, the curvature of field, astigmatism, the image quality of guarantee system, and the technical program can also reach the demand of miniaturization, lightweight and the big angle of visual field.
Description
Technical field
The present invention relates to optical technical field, more particularly to a kind of eyepiece, eyepiece system and micro display helmet are worn.
Background technology
At present, micro display helmet system due to small volume, it is lightweight the features such as extensively get consumer reception.Especially system
The big angle of visual field can build a visual effect for shock to user, allow user as being in cinema screening Room Zhong Guan
See a film the same.
But for the big angle of visual field eyepiece for being applied to micro display helmet system, ratio chromatism, the curvature of field, astigmatism are all shadows
The aberration of image quality is rung, therefore needs a kind of suitable optical design badly and thoroughly solved the above problems.
The content of the invention
The invention provides, can be while the big angle of visual field be obtained, the aberration such as correction ratio chromatism, the curvature of field, astigmatism.
To reach above-mentioned purpose, the technical proposal of the invention is realized in this way：
On the one hand, the invention provides a kind of eyepiece, it is just saturating that the eyepiece sets gradually first against the incident direction of light
Mirror, the second positive lens, the 3rd negative lens,
First positive lens is the plastic material of PMMA models, and its ranges of indices of refraction is 1.45 ＜ n1＜ 1.60, dispersion
Scope is 50 ＜ v1＜ 75, first positive lens has and is convex to the first surface of image space and be convex to the second surface of object space, institute
State first surface and the second surface be it is aspherical；
Second positive lens is the glass material of H-LAK12 models, and its ranges of indices of refraction is 1.45 ＜ n2＜ 1.75, color
It is 50 ＜ v to dissipate scope2＜ 70, second positive lens has and is convex to the 3rd surface of image space and be convex to the 4th surface of object space,
3rd surface and the 4th surface are sphere；
3rd negative lens is the plastic material of OKP1 models, and its ranges of indices of refraction is 1.60 ＜ n3＜ 1.75, dispersion
Scope is 20 ＜ v3＜ 30, the 3rd negative lens has to concave towards and the 5th surface of image space and concaves towards the 6th surface of object space, institute
State the 5th surface and the 6th surface be it is aspherical；
Wherein, image space refers to direction where human eye pupil, and object space refers to direction where light source；The micro display eyepiece is by described first
The overall length of the optical system that positive lens, the second positive lens, the 3rd negative lens are constituted is less than 28mm, and gross weight is no more than 15g, has
45 ° of horizontal field of view angles.
Preferably, the refractive index n of first positive lens1=1.491786, dispersion v1=57.327362；
The refractive index n of second positive lens2=1.696801, dispersion v2=56.199825；
The refractive index n of the 3rd negative lens3=1.640, dispersion v3=22.5.
The eyepiece of the technical program is made up of 3 lens, along light set gradually the first positive lens, the second positive lens,
3rd negative lens, by spherical glass, the lens Rational Arrangement of aspherical plastics, while the big angle of visual field is obtained, can be thorough
The aberrations such as bottom correction ratio chromatism, the curvature of field, astigmatism, it is ensured that the image quality of system, and also miniaturization, lightweight can be realized
And the demand of the big angle of visual field.
On the other hand, eyepiece system is worn the invention provides one kind, including micro display screen and above-mentioned technical proposal are provided
Eyepiece；
The micro display screen is close to the 6th surface of the 3rd negative lens of the eyepiece.
Wherein, the image planes for wearing eyepiece system are located at human eye pupil.
Preferably, the micro display screen for wearing eyepiece system is 1080P, 0.7 inch of M-OLED display screen.
Preferably, the distance between the 6th surface of the micro display screen and the 3rd negative lens can adjust.
The technical program wears eyepiece system, using with self luminous OLED display screen as system micro display
Screen, can be inherently eliminated big visual field micro display helmet system and occur the shortcoming of granulating, and this technology side in viewing
Case applies also for the near-sighted user more than 500 °.
Another aspect, the invention provides a kind of micro display helmet, including above-mentioned technical proposal wears eyepiece system
System.
The micro display helmet of the technical program can realize 45 ° of horizontal field of view angles and optical system overall length is less than
28mm, gross weight are less than 15g, therefore, it is possible to meet the market demand at lightweight, miniaturization, big visual angle.
Brief description of the drawings
Fig. 1 is the operation principle schematic diagram for wearing visual device；
Fig. 2 is a kind of structural representation of eyepiece provided in an embodiment of the present invention；
Fig. 3-a are that eyepiece system of wearing provided in an embodiment of the present invention corrects 900 ° of optical path states figures of myopia；
Fig. 3-b are that eyepiece system of wearing provided in an embodiment of the present invention corrects 500 ° of optical path states figures of myopia；
Fig. 3-c are the optical path states figure worn when eyepiece system does not correct myopia provided in an embodiment of the present invention；
Fig. 4 is the optical transfer function curve synoptic diagram for wearing eyepiece system provided in an embodiment of the present invention；
Fig. 5 is the curvature of field curve synoptic diagram for wearing eyepiece system provided in an embodiment of the present invention；
Fig. 6 is the distortion aberration curve synoptic diagram for wearing eyepiece system provided in an embodiment of the present invention；
Fig. 7 is the point range figure for wearing eyepiece system provided in an embodiment of the present invention；
Fig. 8 is the ratio chromatism, curve synoptic diagram for wearing eyepiece system provided in an embodiment of the present invention.
Specific 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 is the operation principle schematic diagram for wearing visual device, and human eye watches display screen, display screen through micro display eyepiece
The light for sending and forming a huge virtual image at human eye 5m, then is received by the eyepiece by human eye.
When designing the optical system that this wears visual device, using reverse trace, make to wear the display location of visual device
In the image planes position of optical system, diaphragm is located at human eye pupil；Wherein display screen uses M-OLED display screens, for eliminating
The defect of granulation.
The optical system uses special positive and negative structure, with aberrations such as abundant correcting chromatic aberration, the curvature of field, astigmatisms, in system
First piece positive lens is used to converge the outer chief ray of axle of diverging, and second positive lens thereafter is further curved by the outer chief ray of axle
Song, now system will produce huge aberration, therefore a negative lens correction color for dispersion high is placed after second positive lens
Difference, meanwhile, negative lens corrects the aberrations such as astigmatism using aspherical.
Additionally, the first piece positive lens of the optical system and the 3rd negative lens use plastic aspherical element, second just
Lens use glass sphere.The reason for being so designed that be：Outer delivery altitude highest of the chief ray on second lens of axle, most holds
It is also easy to produce aberration, and partial optical glass refraction is high, dispersion is low, produces aberration small, therefore reduced using low dispersion
The generation of aberration；Plastics are easier to be processed into aspherical for glass, and the density ratio optical glass of plastics is small very
Many, price is low with respect to glass, therefore, first piece lens and the 3rd lens are not only able to subtract using the face type of Glass aspheric
Mini system volume, mitigate system weight, also help large batch of production, cost-effective.
Based on above-mentioned design philosophy, the invention provides a kind of eyepiece, as shown in Fig. 2 being provided in an embodiment of the present invention
A kind of structural representation of eyepiece, the eyepiece is set gradually as the first positive lens L1, second just saturating against the incident direction of light
Mirror L2 and the 3rd negative lens L3.
First positive lens L1 has and is convex to the first surface 21 of image space and be convex to the second surface 22 of object space, the first positive lens
L1 is used to converge the outer chief ray of axle of diverging.
Second positive lens L2 has the 3rd surface 23 for being convex to image space and the 4th surface 24 for being convex to object space, the second positive lens
L2 is used to further make the outer chief ray of axle bend towards optical axis.
3rd negative lens L3 has the 5th surface 25 for concaving towards image space and the 6th surface 26 for concaving towards object space, the 3rd negative lens
L3 is used to correct the aberrations such as dispersion, astigmatism.
In a preferred embodiment of the invention, the first positive lens L1 and the 3rd negative lens L3 is plastic material, and second is just saturating
Mirror L2 is glass material；The first surface 21 of the first positive lens L1, the 5th surface of the negative lens L3 of second surface 22 and the 3rd
25 and the 6th surface 26 be aspherical, the 3rd surface 23 of the second positive lens L2 and the 4th surface 24 are sphere.The technical program
By lens and the lens combination of spherical glass material using aspherical plastic material, to ensure eyepiece miniaturization, light weight
Change, while improving image quality.
It is further preferred that the ranges of indices of refraction of the first positive lens L1 is 1.45 ＜ n1＜ 1.60, dispersion range is 50 ＜ v1
＜ 75；
The ranges of indices of refraction of the second positive lens L2 is 1.45 ＜ n2＜ 1.75, dispersion range is 50 ＜ v2＜ 70；
The ranges of indices of refraction of the 3rd negative lens L3 is 1.60 ＜ n3＜ 1.75, dispersion range is 20 ＜ v3＜ 30.
Specifically, plastic materials of the first positive lens L1 for PMMA models, its refractive index n1=1.491786, dispersion v1=
57.327362；
Second positive lens L2 is the glass material of H-LAK12 models, its refractive index n2=1.696801, dispersion v2=
56.199825；
3rd negative lens L3 is the plastic material of OKP1 models, its refractive index n3=1.640, dispersion v3=22.5.
In the above-mentioned technical solutions, the optical system of the positive and negative structure being made up of 3 lens can obtain big visual field
While angle, the aberrations such as ratio chromatism, the curvature of field, astigmatism are thoroughly corrected.Eyepiece in the present embodiment can realize 45 ° of horizontal field of view
Angle, and the aberrations such as ratio chromatism, the curvature of field, astigmatism are corrected, almost without anamorphose, image quality is preferable.
Another embodiment of the present invention is supplied to one kind and wears eyepiece system, and this wears eyepiece system includes：Micro display
The eyepiece that screen and above-mentioned technical proposal are provided, the micro display screen is close to the 6th surface 26 of the 3rd negative lens L3 of eyepiece；
The image planes for wherein wearing eyepiece system are located at human eye pupil；Because the image height of eyepiece is high more than the maximum of display screen
Degree（0.7 inch）, therefore picture will not be just lost because of wearing, more loose use environment can be provided the user with.
In actual applications, above-mentioned micro display screen is preferably by 1080P（Progressive scan, progressive scan）、
0.7 inch of OLED display screen, can be inherently eliminated big visual field micro display helmet system and occur lacking for granulating in viewing
Point.
OLED display screen compares LCOS（Liquid Crystal on Silicon, the attached silicon of liquid crystal）Or DLP（Digital
Light Procession, digital light treatment）Technology, with self luminous advantage, therefore does not need external light source, it is not required that
Reflecting prism, can break away from the limitation of clear aperature, can also further reduce the volume of system, and 1080P resolution ratio
Granular sensation can be effectively reduced, image quality is improved.
It should be noted that the distance between the 6th surface 26 of micro display screen and the 3rd negative lens L3 in the present embodiment
It is adjustable, by the distance between the 6th surface 26 for adjusting micro display screen and the 3rd lens L3（Distance is constant between other elements）Come
Adapt to near-sighted user.When using 0.7 inch of OLED display screen, the most narrow spacing between OLED display chips and the 3rd negative lens L3
From being 4.1mm, the protective glass and the step width of 05mm of the BK7 materials of display chip 0.7mm, above-mentioned minimum range are removed
2.2mm is there remains, myopia is compensated by adjusting this distance, the distance is shorter, and corrected myopia degree is higher, the present embodiment
In wear eyepiece system can at most compensate it is nearly 900 degree myopia produced by focal length；Specific reference Fig. 3-a~3-c, Fig. 3-
A~3-c is respectively the optical path states worn when eyepiece system corrects 900 °, 500 ° and do not correct myopia that the present embodiment is provided
Figure, it can be seen that during 900 degree of myopia of correction, the negative lens L3's of micro display screen distance the 3rd is closest, does not correct near
Apparent time, the distance of the negative lens L3 of micro display screen distance the 3rd is farthest.
The present embodiment wears eyepiece system and can reach following technical indicator：
45 ° of horizontal field of view angles；
System overall length is less than 28mm, and gross weight is no more than 15g；
The aberrations such as system compensation ratio chromatism, the curvature of field, astigmatism, image quality is preferable；
Almost without anamorphose, distortion is less than 5%；
With rear cut-off distance more long, it is adaptable to more than 500 ° of users of myopia；
With larger visual field surplus and emergent pupil away from surplus；
Suitable for 0.7 inch of OLED display screen of 1080P.
Fig. 4 is the optical transfer function curve synoptic diagram for wearing eyepiece system provided in an embodiment of the present invention, and the optics is passed
Delivery function MTF is MTF of 30 lines under.Transverse axis represents every millimeter of demand pairs in figure, and dimensional units are lp/mm, and the longitudinal axis is represented
Imaging reaches the percentage of situation in kind as matter, and from 0 to 1, optical transfer function MTF can be with the imaging matter of concentrated expression system
Amount, the more smooth and relative transverse axis of its curve shape is highly higher（I.e. closer to 1）, the image quality of system is better；Divide in Fig. 6
The picture matter under 0.000mm to 9.500mm image heights is not depicted, it can be seen that the curve of transmission function is more smoothed tightly
Gather, the image quality of camera lens is preferable.
Fig. 5 is the curvature of field curve synoptic diagram for wearing eyepiece system provided in an embodiment of the present invention, and the t lines in figure are meridian
Song, s lines are Sagittal field curvature, and the difference of meridianal curvature of field and Sagittal field curvature is the astigmatism of system, and the curvature of field and astigmatic influence outside system axle
The aberration of field rays, difference crosses the serious image quality for having influence on system off-axis ray of conference.It can be seen that this
The curvature of field and astigmatism of system are corrected in very low range.
Fig. 6 is the distortion aberration curve synoptic diagram for wearing eyepiece system provided in an embodiment of the present invention, and distortion is not interfered with
The definition of system, can only cause system anamorphose, distortion to be solved by later image treatment.Head in the technical program
The distortion of eyepiece system is worn less than 5%, this explanation anamorphose is very little, it is believed that undistorted.
Fig. 7 is the point range figure for wearing eyepiece system provided in an embodiment of the present invention, and point range figure is shown each of system
The disc of confusion that field rays are converged and formed at image planes, the system of characterizing obtains the characteristic of various differences, the RMS in point range figure
RADIUS（Root mean square radii）The image quality of smaller proof system is better.Three kinds of greyscale colors represent three kinds of ripples respectively in Fig. 7
The light of section, the aberration of three kinds of systems of more making out a certificate of the disc of confusion of greyscale color point is bigger；The system is in imaging plane（IMA
Image planes）On disc of confusion root mean square radii from 0.000mm to 9.500mm under image height be followed successively by 6.183 μm, 6.204 μm, 6.784 μ
M, 8.800 μm, 11.768 μm, 14.418 μm, 15.656 μm, 14.931 μm, 13.944 μm, 14.243 μm, 13.940 μm, thus
Understand that the aberration of the system obtains good correction.
Fig. 8 is the ratio chromatism, curve synoptic diagram for wearing eyepiece system provided in an embodiment of the present invention, and the longitudinal axis is the angle of visual field,
Transverse axis is relative green glow（Green glow is the longitudinal axis in figure）The difference in height of hot spot, unit for μm.C curve in figure is the multiplying power of system
Chromatic curve, 16 μm are much smaller than in Fig. 8 relative to ratio chromatism, value on each position of the longitudinal axis, illustrate that the aberration of the system obtains good
Good correction.
Another embodiment of the present invention is supplied to a kind of micro display helmet, and the micro display helmet includes above-mentioned
What technical scheme was provided wears eyepiece system.
In sum, the invention discloses a kind of eyepiece, wear eyepiece system and wear visual device, the eyepiece is by 3
Lens are constituted, and the first positive lens, the second positive lens, the 3rd negative lens are set gradually along light, by spherical glass, aspherical
The lens Rational Arrangement of plastics, while the big angle of visual field is obtained, can thoroughly correct the aberrations such as ratio chromatism, the curvature of field, astigmatism,
The image quality of guarantee system, and also the demand of miniaturization, lightweight and the big angle of visual field can be realized.
Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the scope of the present invention.It is all
Any modification, equivalent substitution and improvements made within the spirit and principles in the present invention etc., are all contained in protection scope of the present invention
It is interior.
Claims (7)
1. a kind of eyepiece, it is characterised in that the eyepiece sets gradually the first positive lens, second just saturating against the incident direction of light
Mirror, the 3rd negative lens,
First positive lens is the plastic material of PMMA models, and its ranges of indices of refraction is 1.45 ＜ n1＜ 1.60, dispersion range is
50 ＜ v1＜ 75, first positive lens has and is convex to the first surface of image space and be convex to the second surface of object space, described first
Surface and the second surface are aspherical；
Second positive lens is the glass material of H-LAK12 models, and its ranges of indices of refraction is 1.45 ＜ n2＜ 1.75, dispersion model
It is 50 ＜ v to enclose2＜ 70, second positive lens is described with being convex to the 3rd surface of image space and being convex to the 4th surface of object space
3rd surface and the 4th surface are sphere；
3rd negative lens is the plastic material of OKP1 models, and its ranges of indices of refraction is 1.60 ＜ n3＜ 1.75, dispersion range is
20 ＜ v3＜ 30, the 3rd negative lens has to concave towards and the 5th surface of image space and concaves towards the 6th surface of object space, the described 5th
Surface and the 6th surface are aspherical；
Wherein, image space refers to direction where human eye pupil, and object space refers to direction where light source；The eyepiece is by first positive lens,
The overall length of the optical system that two positive lens, the 3rd negative lens are constituted is less than 28mm, and gross weight is no more than 15g, is regarded with 45 ° of levels
Rink corner.
2. eyepiece according to claim 1, it is characterised in that
The refractive index n of first positive lens1=1.491786, dispersion v1=57.327362；
The refractive index n of second positive lens2=1.696801, dispersion v2=56.199825；
The refractive index n of the 3rd negative lens3=1.640, dispersion v3=22.5.
3. one kind wears eyepiece system, it is characterised in that the eyepiece system of wearing includes：Micro display screen and claim 1 or 2
Described eyepiece；
The micro display screen is close to the 6th surface of the 3rd negative lens of the eyepiece.
4. it is according to claim 3 to wear eyepiece system, it is characterised in that the image planes for wearing eyepiece system are located at people
At eye pupil hole.
5. it is according to claim 3 to wear eyepiece system, it is characterised in that it is described wear eyepiece system micro display screen be
1080P, 0.7 inch of OLED display screen.
6. eyepiece system is worn according to claim any one of 3-5, it is characterised in that the micro display screen and described
The distance between the 6th surface of three negative lenses can adjust.
7. a kind of micro display helmet, it is characterised in that including wearing eyepiece system described in claim any one of 3-6.
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| CN201510042053.4A CN104635333B (en) | 2015-01-26 | 2015-01-26 | A kind of eyepiece, wear eyepiece system and micro display helmet |
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| CN201510042053.4A CN104635333B (en) | 2015-01-26 | 2015-01-26 | A kind of eyepiece, wear eyepiece system and micro display helmet |
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| CN104635333B true CN104635333B (en) | 2017-05-31 |
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| CN106501943B (en) * | 2017-01-05 | 2019-03-01 | 北京海鲸科技有限公司 | A kind of eyepiece optical system for wearing display equipment |
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| CN107272185A (en) * | 2017-05-22 | 2017-10-20 | 茆胜 | A kind of optical eyepiece suitable for miniscope |
| US10976551B2 (en) | 2017-08-30 | 2021-04-13 | Corning Incorporated | Wide field personal display device |
| CN107422484B (en) * | 2017-09-19 | 2023-07-28 | 歌尔光学科技有限公司 | Prismatic AR display device |
| CN110727101B (en) * | 2018-07-16 | 2022-08-02 | 玉晶光电股份有限公司 | Eyepiece optical system |
| CN109709676A (en) * | 2019-03-07 | 2019-05-03 | 浙江水晶光电科技股份有限公司 | A kind of augmented reality optics module and augmented reality device |
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| CN113325567B (en) * | 2021-08-02 | 2022-08-02 | 深圳纳德光学有限公司 | Reflective eyepiece optical system and head-mounted near-to-eye display device |
| CN113341557B (en) * | 2021-08-02 | 2022-08-02 | 深圳纳德光学有限公司 | Reflective eyepiece optical system and head-mounted near-to-eye display device |
| CN113325566B (en) * | 2021-08-02 | 2022-08-05 | 深圳纳德光学有限公司 | Reflective eyepiece optical system and head-mounted near-to-eye display device |
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Inventor after: Wang Yuanpeng Inventor after: Jiang Bin Inventor before: Wang Yuanpeng |
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Effective date of registration: 20201012 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. |