CN106707498A - Large-visual-field-angle high-image-quality eyepiece optical system and head-mounted display device - Google Patents
Large-visual-field-angle high-image-quality eyepiece optical system and head-mounted display device Download PDFInfo
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- CN106707498A CN106707498A CN201510776895.2A CN201510776895A CN106707498A CN 106707498 A CN106707498 A CN 106707498A CN 201510776895 A CN201510776895 A CN 201510776895A CN 106707498 A CN106707498 A CN 106707498A
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- 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
- G02B25/00—Eyepieces; Magnifying glasses
- G02B25/001—Eyepieces
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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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Abstract
The invention relates to a large-visual-field-angle high-image-quality eyepiece optical system and a head-mounted display device. The large-visual-field-angle high-image-quality eyepiece optical system comprises a first lens group and a second lens group which are coaxially and sequentially arranged from a human eye to an image source along an optical axis direction, wherein the first lens group and the second lens group satisfy a certain focal length relationship. The effective focal length of the first lens group is a negative value, and the first lens group is composed of a first lens close to the human eye and a second lens away from the human eye. The effective focal length of the second lens group is a positive value, and the second lens group is composed of one or two pieces of lenses. The first lens is in a biconvex shape, the optical surface, close to the human eye, of the second lens is recessed towards the human eye, and the first lens and the second lens are each of an aspheric surface type. The distance between the first lens and the second lens, a focal length relationship between lenses in the second lens group, and material characteristics of the lenses satisfy certain relationships, and the second lens group further comprises a fourth lens. The large-visual-field-angle high-image-quality eyepiece optical system has the advantages of large aperture, large field of view, high resolution, low distortion, small size and the like, and is suitable for the head-mounted display and similar devices.
Description
Technical field
It is the present invention relates to optical technical field more particularly to a kind of suitable for head-mounted display or similar device
The eyepiece optical system and head-wearing display device of big angle of visual field picture matter high.
Background technology
As electronic device constantly develops to ultraminiaturization, and new computer, microelectronics, photoelectric device
With the development of communication theory and technology, wearable computing is this based on " people-oriented " " people computer system "
New ant algorithms have become possibility.Being continued to bring out in fields such as military, industry, medical treatment, education, consumption should
With.In a typical wearable computing system framework, head-mounted display apparatus are crucial parts.
By optical technology, by miniature image display, (such as transmission-type or reflection type liquid crystal show head-wearing display device
Display screen, organic electroluminescence device, DMD device) video image light that sends is directed to the pupil of user,
Realize virtual, enlarged drawing in the nearly mesh scope of user, for user provide directly perceived, visual image,
Video, text information.Eyepiece optical system is the core of head-wearing display device, and realization shows miniature image
The function of virtual enlarged drawing is formed before human eye.
Head-wearing display device is lightweight towards volume compact, is easy to wear, and mitigates the directions such as load and develops.
Meanwhile, the big angle of visual field and euphorosia experience be increasingly becoming weigh head-wearing display device it is good and bad it is crucial because
Element, the big angle of visual field determines the visual experience effect of telepresenc high, high as matter, low distortion determine vision body
The comfort level tested.These requirements are met, it is necessary to eyepiece optical system realizes the big angle of visual field, Gao Tu as much as possible
As indexs such as resolving power, low distortion, the small curvature of field, small sizes, while meeting above-mentioned optical property to system
Design and aberration optimization are very big challenges.
Three axicons combination (referred to as " positive negative and positive ") with positive focal length, negative focal length and positive focal length respectively
Common eyepiece optical system is constituted, many documents are based on the structure and propose respective design.Patent document 1
(the China Patent Publication No. of (China Patent Publication No. CN101887166B), patent document 2
CN103217782A), patent document 3 (China Patent Publication No. CN104730706A), patent document 4 (in
State patent publication No. CN103988111A), patent document 5 (China Patent Publication No. CN104685402A),
Patent document 6 (China Patent Publication No. CN104603669A), (U.S. Patent Publication No. of patent document 7
US7978417B2), patent document 8 (U.S. Patent Publication No. US8345139B2) is provided using altogether respectively
Axle three eyepiece optical systems of lens morphosis of positive negative and positive, realize low distortion (<3%), height is as matter
Effect.But the available field of view angle of above-mentioned eyepiece system is smaller, respectively from 16 °~37 °, it is not carried out regarding greatly
Rink corner effect.
Patent document 9 (U.S. Patent Publication No. US5815317A) provides a kind of mesh for wearing display
Mirror system, is made up of monolithic positive lens, double glued negative lenses, monolithic positive lens, can be regarded as on the whole positive and negative
Positive optical texture, the eyepiece system can realize the big angle of visual field effect (>50 °), but its curvature of field and picture
The aberration residual such as scattered is larger, and peripheral field is difficult to high-resolution optical effect as matter, when being unfavorable for long
Between comfortable visual experience.
The positive and negative optical texture as coaxial three lens of another kind, is capable of achieving the larger angle of visual field, application
In eyepiece optical system.Patent document 10 (China Patent Publication No. CN104635333A) is carried and employed just
Positive and negative structure has supplied a kind of eyepiece optical system, be capable of achieving the big angle of visual field (>50 °) optical effect, but
The outer coma of the axle of the eyepiece system is larger, while remaining larger aberration, reduces the optical resolution of the outer visual field of axle
Ability, is unfavorable for comfortable visual experience.
Patent document 11 (China Patent Publication No. CN104536130A) provides a kind of eyepiece optical system,
The 4th lens of positive light coke are added on the basis of the optical texture of positive and negative coaxial three lens, is constituted
The optical texture of positive negative and positive；Patent document 12 (U.S. Patent Publication No. US5877900A) provides one
Eyepiece optical system is planted, is arranged successively from eye-observation side to miniature image display device side along optical axis direction is coaxial
List piece positive lens, monolithic positive lens, double glued negative lenses, monolithic positive lens, see constitute just on the whole
The optical texture of positive negative and positive.Eyepiece optical system described in above-mentioned two documents can all realize the big angle of visual field
(>50 °) optical effect, while have the optical indexes such as more preferable axle outer coma, system aberration, but
The aberration such as the curvature of field and astigmatism has residual, causes central vision and the picture matter of peripheral field to there is notable difference, more
It is lower to edge more visual field optical resolution, it is not carried out the high-resolution optics effect in the range of silent frame
Really.
Patent document 13 (China Patent Publication No. CN104570323A) provides a kind of eyepiece optical system,
Monolithic positive lens, list are arranged in order from eye-observation side to miniature image display device side along optical axis direction is coaxial
Piece positive lens, monolithic negative lens, monolithic negative lens, constitute positive and negative negative optical texture, the eyepiece system
Be capable of achieving ultra-large vision field angle optical effect (>70 degree), but its distortion it is excessive (>25%) image, is caused to show
Show more serious distortion.
Patent document 14 (U.S. Patent Publication No. US2014/0218806A1) provides a kind of for wearing
The eyepiece system of display, arranges successively from eye-observation side to miniature image display device side along optical axis direction is coaxial
Row positive lens groups and negative lens group, its positive lens groups are made up of 2~3 positive lens, and negative lens group is by positive and negative
Cemented doublet or positive and negative cemented doublet and monolithic bent moon positive lens are constituted, and its foundation structure can be seen as just
The optical texture of positive and negative (double gluings), its further preferably design is employing positive and negative (double gluings) just
Optical texture.The eyepiece optical system, by increasing number of lenses (5 or more), realizes big visual field
Angle (>50 °) and optical system residual aberration is corrected, but lens number of packages is excessive, increases the external form of product
Size and weight, are unfavorable for comfortable wearing experience, and lens face type is complicated, is unfavorable for batch production.
Patent document 15 (China Patent Publication No. CN101609208B) provides a kind of for wearing display
Eyepiece system, be arranged in order list from eye-observation side to miniature image display device side along optical axis direction is coaxial
Piece positive lens, monolithic positive lens, positive and negative double gluing negative lenses, monolithic positive lens, single element lens, same structure
Into complex optical texture, be capable of achieving the big angle of visual field optical effect (>50 degree), but above-mentioned mesh
All there is larger astigmatism in mirror optical system, while constituting optical system using multi-disc lens original paper (is more than 5
Piece), cause the overall dimensions of optical system and weight excessive, it is unfavorable for comfortable wearing experience.
Patent document 16 (China Patent Publication No. CN104965306A) provides a kind of big angle of visual field eyepiece
Optical system, it is disclosed that from eye-observation side to miniature image display device side along optical axis direction it is coaxial according to
The first lens of secondary arrangement, the second lens, the 3rd lens.The eyepiece optical system can realize ultra-large vision field angle
Optical effect (>75 degree), but its peripheral field declined relative to the picture quality of central vision,
Silent frame is not uniform enough as matter, meanwhile, it needs to use the larger optical material of refractive index, existing known
Optical material in, the material of high index of refraction causes the manufacturing cost of product and the weight to increase, and lifts corresponding light
Learn the manufacture difficulty of element.
The content of the invention
The technical problem to be solved in the present invention is, for the drawbacks described above of prior art, there is provided one kind is regarded greatly
The eyepiece optical system and head-wearing display device of rink corner picture matter high.
The technical solution adopted for the present invention to solve the technical problems is：
A kind of eyepiece optical system of big angle of visual field picture matter high is constructed, including from eye-observation side to miniature image
Display device side is along coaxial the first lens group and the second lens group being arranged in order of optical axis direction, and described first
The effective focal length of lens group is f1, f1It is negative value, the effective focal length of second lens group is f2, f2For just
Value, the effective focal length of the eyepiece optical system is fw, meet relationship below (1) and (2)：
-50<f1/fw<-0.6 (1)；
0.3<f2/fw<0.8 (2)；
Wherein：First lens group is made up of two panels lens, be proximate to respectively human eye side the first lens and
Away from the second lens of human eye side, and first lens are the positive lens of biconvex shape, second lens
It is negative lens；Optical surface of second lens near human eye side concaves towards human eye side, and radius of curvature is negative value；
Second lens group is made up of one or more pieces lens, wherein second lens set at least include with
3rd lens of the first lens group neighbour, the 3rd lens are positive lens；
First lens, second lens and the 3rd lens material characteristic meet relationship below
(11), (12) and (13)：
1.50<Nd11<1.82 (11)；
1.55<Nd12<1.75 (12)；
1.50<Nd23<1.78 (13)；
Wherein, above-mentioned Nd11、Nd12、Nd23Respectively described first lens, second lens and described
Refractive index of three lens in d lines；
First lens, second lens and the 3rd lens material characteristic also meet relationship below
(21), (22) and (23)：
35<Vd11<60 (21)；
21<Vd12<35 (22)；
35<Vd23<60 (23)；
Wherein, above-mentioned Vd11、Vd12、Vd23Respectively described first lens, second lens and described
Abbe number of 3rd lens in d lines；
Second lens group also include the 4th lens, the 4th lens be located at the 3rd lens with it is miniature
Between image display device, the effective focal length f of second lens group2, the effective focal length f of the 3rd lens23,
The effective focal length f of the 4th lens24, meet relationship below (5) and (6)：
1≤f23/f2≤1.4 (5)；
f24/f2>3.5 (6)。
Eyepiece optical system of the present invention, wherein, optical surface of second lens near human eye side
For aspherical, and the radius of curvature of two optical surfaces of second lens meets relationship below (3)：
-2.2<(R21+R22)/(R21-R22)<-0.45 (3)；
Wherein, R21It is that second lens are close to human eye side surface radius of curvature, R22It is second lens
Near image source side surface radius of curvature.
Eyepiece optical system of the present invention, wherein, the first lens of first lens group and second saturating
The distance between mirror meets relationship below (4)：
0.06<D12/fw<0.30 (4)；
Wherein, D12Be along the first lens described in optical axis direction near image source side optical surface center with it is described
Optical surface centre distance of second lens near human eye side.
Eyepiece optical system of the present invention, wherein, first lens group and second lens group
Effective focal length meets following relational expression (9) and (10)：
-20.78<f1/fw<-1 (9)；
0.45<f2/fw<0.72 (10)。
Eyepiece optical system of the present invention, wherein, the effective focal length f of first lens group1, second
The effective focal length f of lens group2, and eyepiece optical system effective focal length fwMeet following relational expression (1b),
(2b)：
-5<f1/fw<-1 (1b)；
0.35<f2/fw<0.51 (2b)。
Eyepiece optical system of the present invention, wherein, the radius of curvature of second lens is met with ShiShimonoseki
It is formula (3a)：
-1<(R21+R22)/(R21-R22)<-0.5 (3a)；
Wherein, R21It is that second lens are close to human eye side surface radius of curvature, R22It is second lens
Near image source side surface radius of curvature.
Eyepiece optical system of the present invention, wherein, first lens of first lens group and institute
State the distance between second lens and meet relationship below (4a)：
0.1<D12/fw<0.18 (4a)；
Wherein, D12It is the optical surface center along the lens of optical axis direction first near image source side and the second lens
Near the optical surface centre distance of human eye side.
Eyepiece optical system of the present invention, wherein, the 4th lens are meniscus shape lens, and its
Optical surface near miniature image display device concaves towards miniature image display device.
Eyepiece optical system of the present invention, wherein, it is first lens, second lens, described
3rd lens and the 4th lens are glass material or plastic material.
Eyepiece optical system of the present invention, wherein, it is first lens, second lens, described
One or more in 3rd lens and the 4th lens are axisymmetric aspheric surface lens.
Eyepiece optical system of the present invention, wherein, second lens group also includes the 5th lens, institute
The 3rd lens, the 4th lens and the 5th lens are stated to be arranged successively to miniscope side by from human eye side
Row；Meanwhile, the 4th lens and the 5th lens group into cemented doublet, and the 3rd lens
Effective focal length f23With the effective focal length f of second lens group2Meet following relational expression (8)：
1<f23/f2<1.6 (8)。
Present invention also offers a kind of head-wearing display device, including miniature image display and eyepiece, the mesh
Mirror is located between human eye and the miniature image display, wherein：The eyepiece is described in foregoing any one
Eyepiece optical system.
Head-wearing display device of the present invention, wherein, the miniature image display is organic electroluminescent
Luminescent device or transmissive type liquid crystal display.
Head-wearing display device of the present invention, wherein, the head-wearing display device is identical and right comprising two
Claim the eyepiece optical system for setting.
The beneficial effects of the present invention are：Eyepiece optical system have compact conformation, small size, big visual field,
The advantages of optical resolution high, exit pupil diameter is more than primitive eyepiece.The optical system of the eyepiece can use ball
Face lens are used with non-spherical lens collocation, optical plastic and optical glass are applied in combination, and then are made reducing
Cause on this and the benchmark of product weight, realize the significantly elimination of system aberration, especially while realizing big
The optical indexes such as the angle of visual field, low distortion, low aberration, bent, the low astigmatism of low field, are that observer can be by this
Invent the eyepiece optical system, watch silent frame high definition, it is undistorted, as the uniform significantly picture of matter,
Reach the visual experience of telepresenc high.
Brief description of the drawings
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing：
Fig. 1 is the light channel structure schematic diagram of the eyepiece optical system (four mirrors) of the 1st embodiment of the invention；
Fig. 2 is the point range figure schematic diagram of the 1st embodiment eyepiece optical system (four mirrors) of the invention；
Fig. 3 (a) is that the curvature of field curve of the 1st embodiment eyepiece optical system (four mirrors) of the invention is illustrated
Figure, Fig. 3 (b) is that the distortion curve of the eyepiece optical system (four mirrors) of the 1st embodiment of the invention shows
It is intended to；
Fig. 4 is the light channel structure schematic diagram of the 2nd embodiment eyepiece optical system (four mirrors) of the invention；
Fig. 5 is the point range figure schematic diagram of the 2nd embodiment eyepiece optical system (four mirrors) of the invention；
Fig. 6 (a) is that the curvature of field curve of the 2nd embodiment eyepiece optical system (four mirrors) of the invention is illustrated
Figure, Fig. 6 (b) is that the distortion curve of the eyepiece optical system (four mirrors) of the 2nd embodiment of the invention shows
It is intended to；
Fig. 7 is the light channel structure schematic diagram of the 3rd embodiment eyepiece optical system (four mirrors) of the invention；
Fig. 8 is the point range figure schematic diagram of the 3rd embodiment eyepiece optical system of the invention；
Fig. 9 (a) is that the curvature of field curve of the 3rd embodiment eyepiece optical system (four mirrors) of the invention is illustrated
Figure, Fig. 9 (b) is that the distortion curve of the eyepiece optical system (four mirrors) of the 3rd embodiment of the invention shows
It is intended to；
Figure 10 is the light channel structure schematic diagram of the eyepiece optical system (four mirrors) of the 4th embodiment of the invention；
Figure 11 is the light channel structure schematic diagram of the eyepiece optical system (four mirrors) of the 5th embodiment of the invention；
Figure 12 is the light channel structure schematic diagram of the eyepiece optical system (four mirrors) of the 6th embodiment of the invention；
Figure 13 is the light channel structure schematic diagram of the eyepiece optical system (four mirrors) of the 7th embodiment of the invention；
Figure 14 is the light channel structure schematic diagram of the eyepiece optical system (four mirrors) of the 8th embodiment of the invention；
Figure 15 is the light channel structure schematic diagram of the eyepiece optical system (four mirrors) of the 9th embodiment of the invention；
Figure 16 is the head-wearing display device structural representation of four mirror eyepiece optical systems of the invention；
Figure 17 is the light channel structure schematic diagram of the eyepiece optical system (five mirrors) of the 20th embodiment of the invention；
Figure 18 is the point range figure schematic diagram of the 20th embodiment eyepiece optical system (five mirrors) of the invention；
Figure 19 (a) is that the curvature of field curve of the 20th embodiment eyepiece optical system (five mirrors) of the invention shows
It is intended to, Figure 19 (b) is that the distortion of the eyepiece optical system (five mirrors) of the 20th embodiment of the invention is bent
Line schematic diagram；
Figure 20 is the light channel structure schematic diagram of the eyepiece optical system (five mirrors) of the 21st embodiment of the invention；
Figure 21 is the point range figure schematic diagram of the 21st embodiment eyepiece optical system (five mirrors) of the invention；
Figure 22 (a) is that the curvature of field curve of the 21st embodiment eyepiece optical system (five mirrors) of the invention shows
It is intended to, Figure 22 (b) is that the distortion of the eyepiece optical system (five mirrors) of the 21st embodiment of the invention is bent
Line schematic diagram；
Figure 23 is the head-wearing display device structural representation of five mirror eyepiece optical systems of the invention.
Specific embodiment
The big angle of visual field of the invention is high as the eyepiece optical system structure of matter from people as shown in figure 1, including observing
Examine side saturating along coaxial the first lens group being arranged in order of optical axis direction and second to miniature image display device side
Microscope group, and the effective focal length of the first lens group is f1, f1It is negative value, the effective focal length of the second lens group is
f2, f2It is on the occasion of the effective focal length of eyepiece optical system is fw, meet relationship below (1) and (2)：
-50<f1/fw<-0.6 (1)；
0.3<f2/fw<0.8 (2)；
Wherein：First lens group is made up of two panels lens, be proximate to respectively human eye side the first lens and away from
Second lens of human eye side, and the first lens are the positive lens of biconvex shape, the second lens are negative lenses；The
Optical surface of two lens near human eye side concaves towards human eye side, and radius of curvature is negative value；Second lens group is by one
Piece or multi-disc lens are constituted, wherein the second lens set at least includes the 3rd lens with the first lens group neighbour,
3rd lens are positive lens；First lens, the second lens and the 3rd lens material characteristic meet relationship below
(11), (12) and (13)：
1.50<Nd11<1.82 (11)；
1.55<Nd12<1.75 (12)；
1.50<Nd23<1.78 (13)；
Wherein, Nd11、Nd12、Nd23The folding of respectively the first lens, the second lens and the 3rd lens in d lines
Penetrate rate；First lens, the second lens and the 3rd lens material characteristic meet formula (21), (22) and (23)：
35<Vd11<60 (21)；
21<Vd12<35 (22)；
35<Vd23<60 (23)；
Wherein, Vd11、Vd12、Vd23Respectively the first lens, the second lens and the 3rd lens d lines Ah
Shellfish number；
Second lens group also includes the 4th lens, and the 4th lens are located at the 3rd lens and miniature image
Between display device, the effective focal length f of second lens group2, the effective focal length f of the 3rd lens23, the
The effective focal length f of four lens24, meet relationship below (5) and (6)：
1≤f23/f2≤1.4 (5)；
f24/f2>3.5 (6)。
In the above-described embodiments, the first lens group fully corrects the picture of system by the combination of positive negative lens
Difference, improves the optical resolution of system.Wherein, it is close to by the first lens combination using biconvex faces
The surface of human eye side concaves towards the second lens of human eye, efficiently reduces the overall dimensions of eyepiece optical system.
And, the second lens group can provide enough positive light cokes, to ensure that it is sufficiently large that eyepiece optical system can be realized
The angle of visual field.
Importantly, being 1.50 by using the refractive index in d lines on the basis of features described above<Nd23
<1.78 the 3rd lens, i.e., using the positive negative lens phase of the 3rd lens compared with low-refraction and the first lens group
With reference to, the defect of prior art is effectively improved, the big angle of visual field, low distortion, optical resolution high are realized,
So as to reduce manufacture difficulty, manufacturing cost and the product weight of the optical system, product is greatly improved
Consumer's Experience；And by the combination to material dispersion coefficient, the aberration of optical system is improved, improve
The optical property of system.
Meanwhile, the 4th lens of positive light coke are added, it is advantageously implemented the optics of the bigger angle of visual field and Geng Gao
Resolution ratio.The value of relational expression (5) is more than or equal to 1, is used to reduce the processing and manufacturing difficulty of the 3rd lens
With the requirement to material high index of refraction, its value be less than or equal to 1.4, be conducive to system to realize image space telecentricity,
The value of relational expression (6) is more than 3.5, is used to ensure that system has sufficiently large back focal length, is conducive to eyepiece
Optical system realizes large-scale diopter adjustment.
Wherein, Nd11Can be 1.50,1.52,1.57,1.62,1.70,1.73,1.79,1.80,1.82 etc..
Nd12Can be 1.55,1.58,1.62,1.65,1.66,1.68,1.70,1.73,1.75 etc..
Nd23Can be 1.50,1.52,1.57,1.60,1.63,1.65,1.70,1.73,1.78 etc..
Vd11Can be 35,36.2,37.4,38.1,40.3,46.8,57.4,60 etc..
Vd12Can be 21,26.2,27.4,28.5,30.3,32.8,33.4,35 etc..
Vd13Can be 35,36.2,37.4,38.1,40.3,46.8,57.4,60 etc..
f23/f2Value can be 1,1.1,1.2,1.3,1.4 etc..f24/f2Value can be 3.5,
3.6th, 3.7,3.8,4.7,5.8,6.9,12.5 etc..
On the basis of above-described embodiment, it is preferable that the effective focal length f of the first lens group1, the second lens group
Effective focal length f2, and eyepiece optical system effective focal length fwMeet following relational expression (1a), (2a)：
-20.78<f1/fw<-1 (1a)；
0.3<f2/fw<0.526 or 0.700<f2/fw<0.8 (2a)。
F in above-mentioned relation formula (1a), (2a)1/fwAnd f2/fwSpan to the correction of system aberration,
The sensitivity of the difficulty of processing and optical element assembling deviation of optical element is closely related, relational expression (1a)
Middle f1/fwValue be more than -20.78, system aberration is fully corrected, so as to realize the optics of high-quality
Effect, its value is less than -1, improves the machinability of optical element in the system；In relational expression (2a)
F2/fwValue is more than 0.3, improves the machinability of optical element in the system, and its value is less than
0.8, system aberration is fully corrected, so as to realize the optical effect of more high-quality.
Wherein, f1/fwValue can be -20.78, -19.22, -18.74, -12.4, -10.56, -5,
- 6.6, -3.43, -2, -1 etc..f2/fwValue can be 0.3,0.4,0.51,0.526,
0.7th, 0.75,0.78,0.8 etc..
On the basis of above-described embodiment, it is further preferred that the effective focal length f1 of the first lens group, the second lens group has
Effect focal length f2, and eyepiece optical system effective focal length fwMeet relational expression (1b), (2b)：
-5<f1/fw<-1 (1b)；
0.35<f2/fw<0.51 (2b)。
By the span of further preferred first lens group, the second lens group and system effective focal length, more
The optical property and processing and manufacturing difficulty of the optical system are balanced well.
In a further embodiment, in above-mentioned eyepiece optical system：Optics of second lens near human eye side
Surface corrects the distortion of system for aspherical well, and the second lens two curvature of optical surface half
Footpath meets relationship below (3)：
-2.2<(R21+R22)/(R21-R22)<-0.45 (3)；
Wherein, R21It is that the second lens are close to human eye side surface radius of curvature, R22It is that the second lens are close to image source
Side surface radius of curvature.
Wherein relation is (R in (3)21+R22)/(R21-R22) lower limit value condition be more than -2.2, make the
Two lens can provide enough negative powers, such that it is able to correction system aberration is better balanced, realize good optics effect
Really, its value is less than -0.45, reduces the correction difficulty of spherical aberration, is easy to implement big optical aperture.
Wherein (R21+R22)/(R21-R22) value can be -2.2, -1.8, -1.2, -1, -0.8,
- 0.6, -0.5 etc..
Preferably, the radius of curvature of above-mentioned second lens meets relationship below (3a)：
-1<(R21+R22)/(R21-R22)<-0.5 (3a)。
Relational expression (3a) is to (R in relational expression (3)21+R22)/(R21-R22) span it is further
It is preferred so that while the aberrations at different levels of optical system obtain good optimization, in turn ensure that the second lens have
There is good manufacturing.
Further, the distance between first lens and the second lens of the first lens group meet relational expression (4)：
0.06<D12/fw<0.30 (4)；
Wherein, D12It is the optical surface center along the lens of optical axis direction first near image source side and the second lens
Near the optical surface centre distance of human eye side.
D in above-mentioned relation formula (4)12/fwLower limit value be more than 0.06, reduce system off-axis aberration
Correction difficulty, it is ensured that central vision and peripheral field reach picture quality higher simultaneously, make picture in silent frame
Matter is uniform, and its value is less than 0.3, is easy to reduce overall length of system, is conducive to the miniaturization of product.
Wherein D12/fwValue can be 0.06,0.08,0.1,0.14,0.15,0.18,0.20,0.24,
0.26th, 0.30 etc..
Preferably, the distance between first lens and the second lens of the first lens group meet relational expression (4a)：
0.1<D12/fw<0.18 (4a)。
Relational expression (4a) is to D in relational expression (4)12/fwScope further preferably, be conducive to more
Optimize aberrations at different levels well, while realizing the miniaturization of optical system total length.
In a further embodiment, the 4th lens are the lens of meniscus shape, and its close miniature image
The optical surface of display device concaves towards miniature image display device.
The aberrations such as the astigmatism and the curvature of field of system are further improved, is conducive to eyepiece system to realize that silent frame is equal
The high-resolution optical effect of even picture matter.
In a further embodiment, the material property of the 4th lens meets (71) claimed below and (72)：
1.50<Nd24<1.75 (71)；
40<Vd24<65 (72)；
Wherein, Nd24It is the 4th lens in the refractive index of d lines；Vd24It is the 4th lens in the Abbe number of d lines.
For example, Nd24Can be 1.50,1.52,1.54,1.60,1.62,1.65,1.70,1.75.
Vd24Can be 40,44,47,50,51,52,61,65.
Preferably, the material property of above-mentioned 4th lens meets (71a) claimed below and (72a)：
1.6<Nd24<1.65 (71a)；
50<Vd24<61 (72a)；
Wherein, Nd24It is the 4th lens in the refractive index of d lines, Vd24It is the 4th lens in the Abbe number of d lines.
In a further embodiment, the second lens group also include the 4th lens and the 5th lens, the 3rd lens,
4th lens and the 5th lens are arranged in order by from human eye side to miniscope side；Meanwhile, the 4th lens and
5th lens group into cemented doublet, and the 3rd lens effective focal length f23With effective Jiao of the second lens group
Away from f2Meet following relational expression (8)：
1<f23/f2<1.6 (8)。
F in relational expression (8)23/f2Lower limit value be more than 1, the processing and manufacturing for being used to reduce the 3rd lens is difficult
Degree and the requirement to material high index of refraction, its span are less than 1.6, are conducive to system to realize telecentric beam path in image space.
In a further embodiment, under the effective focal length of the first lens group and the second lens group further meets
Face relational expression (9) and (10)：
-21<f1/fw<-1.5 (9)；
0.45<f2/fw<0.72 (10)。
By the span of further preferred first lens group, the second lens group and system effective focal length, more
The optical property and processing and manufacturing difficulty of the optical system are balanced well.
Wherein, f1/fwValue can be -21, -18.2, -15.7, -10.1, -8.5, -7.3, -6.1,
- 5.1, -2, -1, -1.5 etc..f2/fwValue can be 0.45,0.52,0.63,0.68,0.70,
0.72 etc..
In a further embodiment, the first lens, the second lens, the 3rd lens and the 4th lens are glass
Material or plastic material.
While so that the aberrations at different levels of the eyepiece optical system are fully corrected, optics unit is controlled again
The manufacturing cost of part and the weight of optical system.
In a further embodiment, the optics of the first lens, the second lens, the 3rd lens and the 4th lens
Face is all axisymmetric aspheric surface.Aspherical expression formula is formula (a)：
Wherein, z is the rise of optical surface, and c is aspherical apex curvature, and k is asphericity coefficient, α 2,4,6 ...
It is each level number, r is range coordinate of the point to lens system optical axis on curved surface.
Make the optical system aberration (including spherical aberration, coma, distortion, the curvature of field, astigmatism, aberration and its
Its higher order aberratons) sufficiently corrected, be conducive to the eyepiece optical system realizing the big angle of visual field, big
While aperture, picture quality, diminution central vision and the side of central vision and peripheral field are further lifted
Edge view field image qualitative difference, realizes picture quality evenly and low distortion in silent frame.
In a further embodiment, the first lens, the second lens, the 3rd lens, the 4th lens and the 5th
One or more in lens are axisymmetric aspheric surface lens, and plurality of refers to two, three, four or five.
The aberrations at different levels of the optical system are made to obtain further optimization correction.Further lift the eyepiece
The optical property of optical system.
Below by more specific embodiment to the principle of above-mentioned eyepiece optical system, scheme and display result
Further illustrated.
In following examples, diaphragm E can be the emergent pupil of eyepiece optical system imaging, be one and virtual go out
Light aperture, the pupil of human eye is at stop position, it can be observed that optimal imaging effect.
[embodiment 1]
As shown in Figure 1, the light channel structure schematic diagram of the eyepiece optical system of the 1st embodiment of the invention, from
Eye-observation side is followed successively by diaphragm E, the first lens group G1, to display device I sides (from left to right)
Two lens group G2 and display device I.Wherein, the first lens group G1 is by the first lens L1 and the second lens
L2 is constituted, and the second lens group G2 is made up of the 3rd lens L3 and the 4th lens L4.In the present embodiment,
First lens L1 is positive lens, and the second lens L2 is negative lens, constitutes the first lens with negative power
Group G1, wherein face types of the first lens L1 for biconvex shape, optics of the second lens L2 towards human eye side
Surface concaves towards human eye direction, and is that the first lens L1 and the second lens L2 are all even aspheric surface face type, with
Sufficiently correct the aberrations such as distortion, aberration and curvature of field of system.The 3rd lens L3 is double described in the present embodiment
Convex positive lens, and be even aspheric surface face type, it is used to provide enough positive focal powers, realize big visual field
Angle, the 4th lens L4 is the glass spherical mirror of bent moon form, and its effectively Jiao's focal length is on the occasion of and its both sides
Optical surface all concaves towards display I sides, more fully correct the aberrations such as the curvature of field of system, and raising is
System ground telecentricity, while high imaging quality is kept, reduces optical system assembling susceptibility, further
Improve the available field of view angle of system.Here, the optical surface serial number 1 to be close to diaphragm E sides, according to this
Analogize (be followed successively by 2,3,4,5,6,7,8 from left to right), display I surfaces are 9.
The 1st embodiment eyepiece design data is as shown in table 1 below：
Table 1
The point range figure schematic diagram of the eyepiece optical system shown in accompanying drawing 2 according to the 1st embodiment of the invention.Point range
The geometry of figure reflection optical system imaging, ignores diffraction effect, to specify visual field, specified wavelength light
The disc of confusion that image plane section formed is focused on to represent, can the light comprising multiple visual fields and multi-wavelength simultaneously.
Therefore, it can the dense degree by point range figure disc of confusion, geomery and intuitively weigh optical system imaging
The quality of quality, the color of optical system is intuitively weighed by the degree of misalignment of dot chart different wave length disc of confusion
Difference, the RMS radiuses (root mean square radii) of point range figure are smaller, and the image quality of optical system is higher.From attached
Point range figure shown in Fig. 2 according to the 1st embodiment of the invention can be seen that the present embodiment each field rays and exist
The disc of confusion radius of image plane (display device I) is small and uniform, and different wave length light is focused on a visual field
The disc of confusion degree of misalignment of formation is low, and optical aberration obtains well-corrected, by the eyepiece opticses system
System can be observed the display portrait of overall uniform, high optical property.
Accompanying drawing 3 (a) and accompanying drawing 3 (b) respectively illustrate the field of the eyepiece according to the 1st embodiment of the invention
Bent and distortion curve.It symbolizes the features such as the optical system ultra-large vision field and high imaging quality of the present embodiment.
[embodiment 2]
As shown in Figure 4, the light channel structure schematic diagram of the eyepiece optical system of the 2nd embodiment of the invention, from
Eye-observation side is followed successively by diaphragm E, the first lens group G1, to display device I sides (from left to right)
Two lens group G2 and display device I.Wherein, the first lens group G1 is by the first lens L1 and the second lens
L2 is constituted, and the second lens group G2 is made up of the 3rd lens L3 and the 4th lens L4.In the present embodiment,
First lens L1 is positive lens, and the second lens L2 is negative lens, constitutes the first lens with negative power
Group G1, wherein face types of the first lens L1 for biconvex shape, optics of the second lens L2 towards human eye side
Surface concaves towards human eye direction, and is that the first lens L1 and the second lens L2 are all even aspheric surface face type, with
Sufficiently correct the aberrations such as distortion, aberration and curvature of field of system.The 3rd lens L3 is double described in the present embodiment
Convex positive lens, and be even aspheric surface face type, it is used to provide enough positive focal powers, realize big visual field
Angle, the 4th lens L4 is the glass spherical mirror of bent moon form, and its effectively Jiao's focal length is on the occasion of and its both sides
Optical surface all concaves towards display I sides.The material of the present embodiment the second lens L2 and the 3rd lens L3 is all selected
With optical plastic, so as to significantly reduce the weight and manufacturing cost of system.Here, to be close to diaphragm E
The optical surface serial number 1 of side, the rest may be inferred (being followed successively by 2,3,4,5,6,7,8 from left to right),
Display I surfaces are 9.
The 2nd embodiment eyepiece design data is as shown in table 2 below：
Table 2
The dot chart schematic diagram of the eyepiece optical system shown in accompanying drawing 5 according to the 2nd embodiment of the invention.From figure
In as can be seen that each field rays of the present embodiment it is small in the disc of confusion radius of image plane (display device I)
And it is uniform, different wave length light is in low, the optical system picture that focuses on the disc of confusion degree of misalignment to be formed with visual field
Difference obtains well-corrected, and the aobvious of overall uniform, high optical property can be observed by the eyepiece optical system
Show portrait.
Accompanying drawing 6 (a) and accompanying drawing 6 (b) respectively illustrate the field of the eyepiece according to the 2nd embodiment of the invention
Bent and distortion curve.It symbolizes the features such as the optical system ultra-large vision field and high imaging quality of the present embodiment.
[embodiment 3]
As shown in Figure 7, the light channel structure schematic diagram of the eyepiece optical system of the 3rd embodiment of the invention, from
Eye-observation side is followed successively by diaphragm E, the first lens group G1, to display device I sides (from left to right)
Two lens group G2 and display device I.Wherein, the first lens group G1 is by the first lens L1 and the second lens
L2 is constituted, and the second lens group G2 is made up of the 3rd lens L3 and the 4th lens L4.In the present embodiment,
First lens L1 is positive lens, and the second lens L2 is negative lens, constitutes the first lens with negative power
Group G1, wherein face types of the first lens L1 for biconvex shape, optics of the second lens L2 towards human eye side
Surface concaves towards human eye direction, and is that the first lens L1 and the second lens L2 are all even aspheric surface face type, with
Sufficiently correct the aberrations such as distortion, aberration and curvature of field of system.The 3rd lens L3 is double described in the present embodiment
Convex positive lens, and be even aspheric surface face type, it is used to provide enough positive focal powers, realize big visual field
Angle, the 4th lens L4 is the glass spherical mirror of bent moon form, and its effectively Jiao's focal length is on the occasion of and its both sides
Optical surface all concaves towards display I sides.Compared with the 1st embodiment of the present invention, the present embodiment second
The material of lens L2 and the 3rd lens L3 has all selected optical plastic, so as to significantly reduce the weight of system
And manufacturing cost.Here, be close to diaphragm E sides optical surface serial number 1, the rest may be inferred (from a left side to
The right side is followed successively by 2,3,4,5,6,7,8), display I surfaces are 9.
The 3rd embodiment eyepiece design data is as shown in table 3 below：
Table 3
The dot chart schematic diagram of the eyepiece optical system shown in accompanying drawing 8 according to the 3rd embodiment of the invention.From figure
In as can be seen that each field rays of the present embodiment it is small in the disc of confusion radius of image plane (display device I)
And it is uniform, different wave length light is in low, the optical system picture that focuses on the disc of confusion degree of misalignment to be formed with visual field
Difference obtains well-corrected, and the aobvious of overall uniform, high optical property can be observed by the eyepiece optical system
Show portrait.
Accompanying drawing 9 (a) and accompanying drawing 9 (b) respectively illustrate the field of the eyepiece according to the 3rd embodiment of the invention
Bent and distortion curve.It symbolizes the features such as the optical system ultra-large vision field and high imaging quality of the present embodiment.
In example 4 below -9, the light channel structure of eyepiece optical system is corresponded to as shown in fig. 10-15 respectively,
Wherein, from eye-observation side to display device I sides (from left to right), diaphragm E, the first lens are followed successively by
Group G1, the second lens group G2 and display device I.Wherein, the first lens group G1 by the first lens L1 and
Second lens L2 is constituted, and the second lens group G2 is made up of the 3rd lens L3 and the 4th lens L4.In this reality
Apply in example, the first lens L1 is positive lens, the second lens L2 is negative lens, is constituted with negative power
First lens group G1, wherein face types of the first lens L1 for biconvex shape, the second lens L2 is towards human eye
The optical surface of side concaves towards human eye direction, and is that the first lens L1 and the second lens L2 are all even aspheric surface
Face type, sufficiently to correct the aberration such as distortion, aberration and the curvature of field of system.3rd lens L3 is biconvex
Positive lens, and be even aspheric surface face type, it is used to provide enough positive focal powers, the big angle of visual field is realized,
4th lens L4 is the glass spherical mirror of bent moon form, and its effectively Jiao's focal length is on the occasion of and its both sides optics
Surface all concaves towards display I sides.
[embodiment 4]
The light channel structure of eyepiece optical system is as shown in Figure 10, the 4th embodiment eyepiece design data such as following table
Shown in 4：
Table 4
After tested, each field rays of the present embodiment are small in the disc of confusion radius of image plane (display device I)
And it is uniform, different wave length light is in low, the optical system picture that focuses on the disc of confusion degree of misalignment to be formed with visual field
Difference obtains well-corrected, and the display that overall uniform, high optical property can be observed by the eyepiece optical system is drawn a portrait.
[embodiment 5]
The light channel structure of eyepiece optical system is as shown in figure 11, the 5th embodiment eyepiece design data such as following table
Shown in 5：
Table 5
After tested, each field rays of the present embodiment are small in the disc of confusion radius of image plane (display device I)
And it is uniform, different wave length light is in low, the optical system picture that focuses on the disc of confusion degree of misalignment to be formed with visual field
Difference obtains well-corrected, and the display that overall uniform, high optical property can be observed by the eyepiece optical system is drawn a portrait.
[embodiment 6]
The light channel structure of eyepiece optical system is as shown in figure 12, the 6th embodiment eyepiece design data such as following table
Shown in 6：
Table 6
After tested, each field rays of the present embodiment are small in the disc of confusion radius of image plane (display device I)
And it is uniform, different wave length light is in low, the optical system picture that focuses on the disc of confusion degree of misalignment to be formed with visual field
Difference obtains well-corrected, and the display that overall uniform, high optical property can be observed by the eyepiece optical system is drawn a portrait.
[embodiment 7]
As shown in figure 13, the 7th embodiment eyepiece design data is as shown in table 7 below for the light channel structure of eyepiece optical system：
Table 7
After tested, each field rays of the present embodiment are small in the disc of confusion radius of image plane (display device I)
And it is uniform, different wave length light is in low, the optical system picture that focuses on the disc of confusion degree of misalignment to be formed with visual field
Difference obtains well-corrected, and the display that overall uniform, high optical property can be observed by the eyepiece optical system is drawn a portrait.
[embodiment 8]
As shown in figure 14, the 8th embodiment eyepiece design data is as shown in table 8 below for the light channel structure of eyepiece optical system：
Table 8
After tested, each field rays of the present embodiment are small in the disc of confusion radius of image plane (display device I)
And it is uniform, different wave length light is in low, the optical system picture that focuses on the disc of confusion degree of misalignment to be formed with visual field
Difference obtains well-corrected, and the display that overall uniform, high optical property can be observed by the eyepiece optical system is drawn a portrait.
[embodiment 9]
As shown in figure 15, the 9th embodiment eyepiece design data is as shown in table 9 below for the light channel structure of eyepiece optical system：
Table 9
After tested, each field rays of the present embodiment are small in the disc of confusion radius of image plane (display device I)
And it is uniform, different wave length light is in low, the optical system picture that focuses on the disc of confusion degree of misalignment to be formed with visual field
Difference obtains well-corrected, and the display that overall uniform, high optical property can be observed by the eyepiece optical system is drawn a portrait.
Each item data of eyepiece optical system of above-described embodiment 1-9 is satisfied by the parameter recorded in the content of the invention
It is required that, it is as a result as shown in table 10 below：
Table 10
| f1/fw | f2/fw | D12/fw | f23/f2 | f24/f2 | (R21+R22)/(R21-R22) | |
| Implement 11 | -1.70 | 0.45 | 0.13 | 1.20 | 8.47 | -0.71 |
| Implement 12 | -17.50 | 0.67 | 0.18 | 1.34 | 4.69 | -1.83 |
| Implement 13 | -0.62 | 0.31 | 0.17 | 1.15 | 10.01 | -0.88 |
| Implement 14 | -50.00 | 0.76 | 0.17 | 1.26 | 6.62 | -2.20 |
| Implement 15 | -4.14 | 0.58 | 0.06 | 1.20 | 7,75 | -0.45 |
| Implement 16 | -6.25 | 0.56 | 0.30 | 1.15 | 14.61 | -1.57 |
| Implement 17 | -50.00 | 0.63 | 0.10 | 1.41 | 3.51 | -0.43 |
| Implement 18 | -0.58 | 0.38 | 0.09 | 1.02 | 10.15 | -0.40 |
| Implement 19 | -1.45 | 0.52 | 0.17 | 1.28 | 5.23 | -0.99 |
During each item data of eyepiece optical system is satisfied by the content of the invention in the embodiment 10-19 for further providing for
The parameter request for being recorded, it is as a result as shown in table 11 below：
Table 11
| f1/fw | f2/fw | D12/fw | f23/f2 | f24/f2 | (R21+R22)/(R21-R22) | |
| Implement 10 | -1.80 | 0.52 | 0.11 | 1.40 | 7.97 | -0.93 |
| Implement 11 | -0.63 | 0.38 | 0.14 | 1.24 | 5.09 | -0.88 |
| Implement 12 | -1.44 | 0.46 | 0.30 | 1.25 | 9.81 | -1.31 |
| Implement 13 | -1.87 | 0.52 | 0.31 | 1.16 | 7.42 | -2.24 |
| Implement 14 | -3.94 | 0.58 | 0.10 | 1.16 | 8.05 | -0.45 |
| Implement 15 | -1.72 | 0.57 | 0.15 | 1.05 | 13.41 | -1.12 |
| Implement 16 | -0.80 | 0.44 | 0.07 | 1.31 | 4.21 | -0.67 |
| Implement 17 | -0.61 | 0.35 | 0.17 | 1.12 | 10.65 | -0.93 |
| Implement 18 | -3.02 | 0.62 | 0.06 | 1.38 | 6.23 | -0.73 |
| Implement 19 | -50.99 | 0.69 | 0.11 | 1.20 | 7.47 | -1.40 |
The specific index path of the eyepiece optical system of embodiment 10-19 and point range diagram etc. are tied as space is limited,
Fruit schematic diagram is no longer listed one by one.After tested, each field rays in embodiment 10-19 eyepiece optical systems
Small and uniform in the disc of confusion radius of image plane (display device I), different wave length light gathers with a visual field
The disc of confusion degree of misalignment that Jiao is formed is low, and optical aberration obtains well-corrected, by the eyepiece optical system
The display portrait of overall uniform, high optical property can be observed.
[embodiment 20]
As shown in Figure 17, the light channel structure schematic diagram of the eyepiece optical system of the 20th embodiment of the invention,
From eye-observation side to display device I sides (from left to right), be followed successively by diaphragm E, the first lens group G1,
Second lens group G2 and display device I.Wherein, the first lens group G1 is saturating by the first lens L1 and second
Mirror L2 is constituted, and the second lens group G2 is made up of the 3rd lens L3, the 4th lens L4 and the 5th lens L5.
In the present invention, diaphragm E can be the emergent pupil of eyepiece optical system imaging, be a virtual light extraction aperture,
The pupil of human eye is at stop position, it can be observed that optimal imaging effect.In the present embodiment, first
Lens L1 is positive lens, and the second lens L2 is negative lens, constitutes the first lens group with negative power
G1, wherein face types of the first lens L1 for biconvex shape, optical surfaces of the second lens L2 towards human eye side
Human eye direction is concaved towards, and is that the first lens L1 and the second lens L2 are all even aspheric surface face type, with abundant
The aberration such as the distortion of correction system, aberration and the curvature of field.
The second lens group G2 described in the present embodiment is by the 3rd lens L3, the 4th lens L4 and the 5th lens
L5 is constituted, wherein the 4th lens L4 and the 5th lens L5 constitutes double combination lens, is fully to correct
System aberration, and the first lens L1, the second lens L2, the 3rd lens L3 are all even aspheric surface face type, use
To provide enough positive focal powers, the big angle of visual field is realized.Here, the optical surface to be close to diaphragm E sides
Serial number 1, the rest may be inferred (being followed successively by 2,3,4,5,6,7,8,9 from left to right), display I
Surface is 10.
The 20th embodiment eyepiece design data is as shown in table 12 below：
Table 12
The point range figure schematic diagram of the eyepiece optical system shown in accompanying drawing 18 according to the 20th embodiment of the invention.Point
The geometry of row figure reflection optical system imaging, ignores diffraction effect, to specify visual field, specified wavelength light
The disc of confusion that line focus image plane section is formed represents, can the light comprising multiple visual fields and multi-wavelength simultaneously
Line.Therefore, it can the dense degree by point range figure disc of confusion, geomery and intuitively weigh optical system
The quality of image quality, optical system is intuitively weighed by the degree of misalignment of dot chart different wave length disc of confusion
Aberration, the RMS radiuses (root mean square radii) of point range figure are smaller, and the image quality of optical system is higher.From
Point range figure shown in accompanying drawing 18 according to the 20th embodiment of the invention can be seen that the present embodiment each visual field light
Line is small and uniform in the disc of confusion radius of image plane (display device I), and different wave length light is with a visual field
The disc of confusion degree of misalignment for focusing on formation is low, and optical aberration obtains well-corrected, by the eyepiece light
System can be observed the display portrait of overall uniform, high optical property.
Accompanying drawing 19 (a) and accompanying drawing 19 (b) respectively illustrate the eyepiece according to the 20th embodiment of the invention
The curvature of field and distortion curve.It symbolizes the spies such as the optical system ultra-large vision field and high imaging quality of the present embodiment
Levy.
[embodiment 21]
As shown in Figure 20, the light channel structure schematic diagram of the eyepiece optical system of the 21st embodiment of the invention,
From eye-observation side to display device I sides (from left to right), be followed successively by diaphragm E, the first lens group G1,
Second lens group G2 and display device I.Wherein, the first lens group G1 is saturating by the first lens L1 and second
Mirror L2 is constituted, and the second lens group G2 is made up of the 3rd lens L3, the 4th lens L4 and the 5th lens L5.
In the present embodiment, the first lens L1 is positive lens, and the second lens L2 is negative lens, and constituting has negative light
First lens group G1 of focal power, wherein face types of the first lens L1 for biconvex shape, the second lens L2 courts
Human eye direction is concaved towards to the optical surface of human eye side, and is that the first lens L1 and the second lens L2 are all even
Aspherical face type, sufficiently to correct the aberration such as distortion, aberration and the curvature of field of system.
The second lens group G2 described in the present embodiment is by the 3rd lens L3, the 4th lens L4 and the 5th lens
L5 is constituted, wherein the 4th lens L4 and the 5th lens L5 constitutes double combination lens, is fully to correct
System aberration, and the first lens L1, the second lens L2, the 3rd lens L3 are all even aspheric surface face type, use
To provide enough positive focal powers, the big angle of visual field is realized.
The first lens of the present embodiment L1, the material of the second lens L2 and the 3rd lens L3 have all selected optics
Plastics, so as to significantly reduce the weight and manufacturing cost of system.Here, the optics to be close to diaphragm E sides
Surface serial number 1, the rest may be inferred (being followed successively by 2,3,4,5,6,7,8,9 from left to right), display
Device I surfaces are 10.
21st embodiment eyepiece design data is as shown in table 13 below：
Table 13
The dot chart schematic diagram of the eyepiece optical system shown in accompanying drawing 21 according to the 21st embodiment of the invention.From
Disc of confusion radius of each field rays of the present embodiment in image plane (display device I) is can be seen that in figure
Small and uniform, different wave length light is in low, the optical system that focuses on the disc of confusion degree of misalignment to be formed with visual field
Aberration obtains well-corrected, and overall uniform, high optical property can be observed by the eyepiece optical system
Display portrait.
Accompanying drawing 22 (a) and accompanying drawing 22 (b) respectively illustrate the eyepiece according to the 21st embodiment of the invention
The curvature of field and distortion curve.It symbolizes the spies such as the optical system ultra-large vision field and high imaging quality of the present embodiment
Levy.
Each item data of above-described embodiment 20-21 is satisfied by the parameter request recorded in the content of the invention, as a result
It is as shown in table 14 below：
Table 14
| f1/fw | f2/fw | D12/fw | f23/f2 | (R21+R22)/(R21-R22) | |
| Implement 20 | -1.91 | 0.48 | 0.16 | 1.23 | -0.92 |
| Implement 21 | -20.78 | 0.71 | 0.22 | 1.36 | -2.79 |
Further test is proved, constituted using the eyepiece optical system of the parameters in table 15 below real
A 22-27 is applied, each field rays is small and uniform in the disc of confusion radius of image plane (display device I),
The disc of confusion degree of misalignment to be formed is low being focused on visual field for different wave length light, and optical aberration obtains good
Good correction, the display that overall uniform, high optical property can be observed by the eyepiece optical system is drawn a portrait.
Design parameter is as shown in table 15 below：
Table 15
| f1/fw | f2/fw | D12/fw | f23/f2 | (R21+R22)/(R21-R22) | |
| Implement 22 | -0.65 | 0.32 | 0.19 | 1.12 | -0.95 |
| Implement 23 | -51.00 | 0.78 | 0.15 | 1.29 | -2.22 |
| Implement 24 | -5.18 | 0.55 | 0.06 | 1.24 | -0.47 |
| Implement 25 | -7.21 | 0.62 | 0.30 | 1.14 | -1.52 |
| Implement 26 | -37.20 | 0.69 | 0.11 | 1.57 | -0.42 |
| Implement 27 | -0.58 | 0.36 | 0.08 | 1.03 | -0.41 |
Explanation and specific embodiment are further illustrated to head-wearing display device of the invention below in conjunction with the accompanying drawings.
Figure 16, Figure 23 represent the composition schematic diagram of the binocular head-wearing display device of present embodiment respectively.Institute
Binocular head-wearing display device 20 is stated including miniature image display 22 and eyepiece, eyepiece be located at human eye with it is miniature
Between image display 22, wherein：Eyepiece is the eyepiece optical system described in foregoing any embodiment.
Specifically, above-mentioned binocular head-wearing display device 20 include eyepiece optical system 21, miniature image display 22,
Eyepiece lens barrel 23, binocular lens tube fixed plate 24, pupillary distance adjusting device 25.
Left and right eye with observer is corresponding, is respectively the left and right observation lens barrel of binocular head-wearing display device 20
201st, 202, and be fastened on respectively in binocular lens tube fixed plate 24 by pupillary distance adjusting device 25,
Inside observation lens barrel, possess respectively along optical axis from observation side：Eyepiece optical system 21, miniature image
Display 22.Meanwhile, the optical element and miniature image display 22 of eyepiece optical system 21 are assemblied in
Inside eyepiece lens barrel 23.
Preferably, miniature image display 22 is organic electroluminescent luminescent device or transmissive liquid crystal display
Device.
Preferably, head-wearing display device 20 includes two identical and symmetrically arranged eyepiece optical systems.
In specific implementation application process, the display content on miniature image display 22, by eyepiece opticses
The difference observed person left and right eye viewing of system 21, forms the clear visual experience amplified.Observer can lead to
Pupillary distance adjusting device 25 is crossed, the relative distance of regulation left and right observation lens barrel adapts to the reality of observer to match
Border interpupillary distance demand, the binocular vision effect for having been formed.
In the present embodiment, can be carried as binocular head-wearing display device 20 and meet right characteristic of the present invention
Eyepiece optical system 21, with simultaneously obtain the performances such as big visual field, high-resolution, low distortion, small size
Wear display effect.
Above content is to combine specific preferred embodiment further description made for the present invention, no
Can assert that specific implementation of the invention is confined to these explanations.It is common for the technical field of the invention
For technical staff, without departing from the inventive concept of the premise, some simple deductions can also be made or replaced
Change, should all be considered as belonging to protection scope of the present invention.
Claims (14)
1. the eyepiece optical system of a kind of big angle of visual field picture matter high, including from eye-observation side to miniature image
Display device side is along coaxial the first lens group and the second lens group being arranged in order of optical axis direction, and described first
The effective focal length of lens group is f1, f1It is negative value, the effective focal length of second lens group is f2, f2For just
Value, the effective focal length of the eyepiece optical system is fw, meet relationship below (1) and (2)：
-50<f1/fw<-0.6 (1)；
0.3<f2/fw<0.8 (2)；
It is characterized in that：First lens group is made up of two panels lens, and the first of human eye side is proximate to respectively
Lens and the second lens away from human eye side, and first lens are the positive lens of biconvex shape, described
Two lens are negative lenses；Optical surface of second lens near human eye side concaves towards human eye side, radius of curvature
It is negative value；
Second lens group is made up of one or more pieces lens, wherein second lens set at least include with
3rd lens of the first lens group neighbour, the 3rd lens are positive lens；
First lens, second lens and the 3rd lens material characteristic meet relationship below
(11), (12) and (13)：
1.50<Nd11<1.82 (11)；
1.55<Nd12<1.75 (12)；
1.50<Nd23<1.78 (13)；
Wherein, above-mentioned Nd11、Nd12、Nd23Respectively described first lens, second lens and described
Refractive index of three lens in d lines；
First lens, second lens and the 3rd lens material characteristic also meet relationship below
(21), (22) and (23)：
35<Vd11<60 (21)；
21<Vd12<35 (22)；
35<Vd23<60 (23)；
Wherein, above-mentioned Vd11、Vd12、Vd23Respectively described first lens, second lens and described
Abbe number of 3rd lens in d lines；
Second lens group also include the 4th lens, the 4th lens be located at the 3rd lens with it is miniature
Between image display device, the effective focal length f of second lens group2, the effective focal length f of the 3rd lens23,
The effective focal length f of the 4th lens24, meet relationship below (5) and (6)：
1≤f23/f2≤1.4 (5)；
f24/f2>3.5 (6)。
2. eyepiece optical system according to claim 1, it is characterised in that second lens are leaned on
The optical surface of person of modern times's eye side is for aspherical, and the radius of curvature of two optical surfaces of second lens meets
Relationship below (3)：
-2.2<(R21+R22)/(R21-R22)<-0.45 (3)；
Wherein, R21It is that second lens are close to human eye side surface radius of curvature, R22It is second lens
Near image source side surface radius of curvature.
3. eyepiece optical system according to claim 2, it is characterised in that first lens group
The first lens and the distance between the second lens meet relationship below (4)：
0.06<D12/fw<0.30 (4)；
Wherein, D12Be along the first lens described in optical axis direction near image source side optical surface center with it is described
Optical surface centre distance of second lens near human eye side.
4. eyepiece optical system according to claim 1, it is characterised in that first lens group
Meet following relational expression (9) and (10) with the effective focal length of second lens group：
-20.78<f1/fw<-1 (9)；
0.45<f2/fw<0.72 (10)。
5. eyepiece optical system according to claim 1, it is characterised in that first lens group
Effective focal length f1, the effective focal length f of the second lens group2, and eyepiece optical system effective focal length fw
Meet following relational expression (1b), (2b)：
-5<f1/fw<-1 (1b)；
0.35<f2/fw<0.51 (2b)。
6. eyepiece optical system according to claim 1, it is characterised in that second lens
Radius of curvature meets relationship below (3a)：
-1<(R21+R22)/(R21-R22)<-0.5 (3a)；
Wherein, R21It is that second lens are close to human eye side surface radius of curvature, R22It is second lens
Near image source side surface radius of curvature.
7. eyepiece optical system according to claim 1, it is characterised in that first lens group
First lens and the distance between second lens meet relationship below (4a)：
0.1<D12/fw<0.18 (4a)；
Wherein, D12It is the optical surface center along the lens of optical axis direction first near image source side and the second lens
Near the optical surface centre distance of human eye side.
8. eyepiece optical system according to claim 1, it is characterised in that the 4th lens are
Meniscus shape lens, and the optical surface of its close miniature image display device concaves towards miniature image display
Part.
9. eyepiece optical system according to claim 1, it is characterised in that first lens,
Second lens, the 3rd lens and the 4th lens are glass material or plastic material.
10. eyepiece optical system according to claim 1, it is characterised in that first lens,
One or more in second lens, the 3rd lens and the 4th lens are axisymmetric aspheric surface
Lens.
11. eyepiece optical systems according to claim 1, it is characterised in that second lens group
Also include the 5th lens, the 3rd lens, the 4th lens and the 5th lens press from human eye side to
Miniscope side is arranged in order；Meanwhile, the 4th lens and the 5th lens group into cemented doublet,
And the effective focal length f of the 3rd lens23With the effective focal length f of second lens group2Meet following relation
Formula (8)：
1<f23/f2<1.6 (8)。
A kind of 12. head-wearing display devices, including miniature image display and eyepiece, the eyepiece are located at human eye
Between the miniature image display, it is characterised in that：The eyepiece is in claim 1 to 11
Eyepiece optical system described in one.
13. head-wearing display devices according to claim 12, it is characterised in that the miniature image
Display is organic electroluminescent luminescent device or transmissive type liquid crystal display.
14. head-wearing display devices according to claim 13, it is characterised in that described to wear display
Device includes two identical and symmetrically arranged eyepiece optical systems.
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| CN201510776895.2A CN106707498B (en) | 2015-11-13 | 2015-11-13 | The eyepiece optical system and head-wearing display device of the high image quality of big field angle |
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