CN105388609A - Optical eyepiece lens and head-mounted display device - Google Patents
Optical eyepiece lens and head-mounted display device Download PDFInfo
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- CN105388609A CN105388609A CN201510783264.3A CN201510783264A CN105388609A CN 105388609 A CN105388609 A CN 105388609A CN 201510783264 A CN201510783264 A CN 201510783264A CN 105388609 A CN105388609 A CN 105388609A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 174
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- 239000004033 plastic Substances 0.000 claims description 5
- 229920003023 plastic Polymers 0.000 claims description 5
- 239000011521 glass Substances 0.000 claims description 4
- 239000000839 emulsion Substances 0.000 claims description 2
- 102220162701 rs201262353 Human genes 0.000 claims description 2
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- 230000002349 favourable effect Effects 0.000 description 8
- 239000006059 cover glass Substances 0.000 description 6
- 238000013461 design Methods 0.000 description 6
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Classifications
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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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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/0101—Head-up displays characterised by optical features
- G02B2027/011—Head-up displays characterised by optical features comprising device for correcting geometrical aberrations, distortion
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Abstract
The invention discloses an optical eyepiece lens and a head-mounted display device. The optical eyepiece lens sequentially comprises, from a human eye observation side to an image source side and along an optical axis, a diaphragm, a first lens, a second lens, and a third lens. The first lens, the second lens and the third lens all have a refractive index, and each comprise an image plane which faces the observation side and allows imaging light to pass through and an object plane which faces the image source side and allows imaging light to pass through. The first lens and the third lens are positive lenses, and the second lens is a negative lens. The first lens is a biconvex lens, the second lens is a plane-concave lens, a biconcave lens or a meniscus lens, and the third lens is an aspheric lens. The invention provides an optical eyepiece lens and a head-mounted display device which still have good optical performance under the condition that the length of the lens system is shortened.
Description
Technical field
The present invention relates to a kind of optical eyepiece camera lens, particularly relate to and a kind ofly wear the optical eyepiece camera lens of display device for micro-display screen and wear display device.
Background technology
Wearing display device due to features such as volume are little, lightweight extensively gets consumer reception.Especially the visual effect of the shock of an immersion can be built in the Large visual angle angle of equipment to user, allows user watch film in the cinema screening Room as being in.
The image source devices wearing display device of prior art extensively adopts the large-sized OLED of a monoblock (OrganicLight-EmittingDiode) and LCD (LiquidCrystalDisplay) screen, the camera lens adopted of simultaneously arranging in pairs or groups has the characteristics such as short working distance, short emergent pupil distance, long-focus, low magnification, but screen resolution on average then shows slightly not enough on simple eye.And another kind of display screen device is as DLP (DigitalLightProcession) digital light process and the attached silicon of LCOS (LiquidCrystalonSilicon) liquid crystal, though small size, high-resolution display screen can be provided, but because illumination need be provided in addition to show, thus cause and must to have longer working distance and the less limitation of field angle with the camera lens of its collocation.
For the Large visual angle angle eyepiece wearing display device, ratio chromatism, the curvature of field, astigmatism are all the aberrations affecting image quality, in order to avoid imaging effect and Quality Down, still will take into account good optical property when shortening the length of optical eyepiece camera lens.
Chinese patent publication No. CN104635333A, CN104536129A, CN101887166A disclose three kinds of optical eyepiece camera lenses be made up of three lens respectively, but still the emergent pupil that there is camera lens is apart from the problem such as shorter, working distance is shorter, magnification is little, wherein, Chinese patent publication No. CN101887166A camera lens emergent pupil distance degree, within 11mm, is unfavorable for that the user of wearing spectacles uses.
In the market wear display device, all meet the different dioptric user demand of user by regulating eyepiece to reach from screen pitch, but without a can when user wears for a long time, solve myopia, long sight and astigmatism problem, these problems all can have influence on the healthy with eye of user simultaneously.
Therefore when arranging in pairs or groups high pixel small size display screen, how effectively can shorten the system length of optical lens and to keep long working distance, grow interpupillary distance, still can maintain enough optical properties simultaneously, be industry problem urgently to be resolved hurrily always.
Summary of the invention
The object of the invention is to the deficiency overcoming prior art, under a kind of condition shortening lens system length is provided, still can possess the optical eyepiece camera lens of good optical property.
The technical solution adopted for the present invention to solve the technical problems is: a kind of optical eyepiece camera lens, diaphragm, the first lens, the second lens and the 3rd lens are sequentially comprised from human eye observation side to image source along optical axis, and these first lens, the second lens and the 3rd lens all have refractive index, and comprise respectively one towards observation side and the face, image side and that imaging light is passed through towards image source side and the thing side making imaging light pass through;
And these first lens, the second lens, the 3rd lens meet following requirement:
Nd1>1.88，Nd2>1.94，Nd3>1.49；Vd1<40.9，Vd2<18.0，Vd3<57.4；
Wherein, Nd1, Nd2, Nd3 represent that the first lens, the second lens, the 3rd lens are in the refractive index of d line respectively; Vd1, Vd2, Vd3 represent that the first lens, the second lens, the 3rd lens are at the abbe number of d line respectively;
Described first lens, the second lens, the 3rd lens meet following relational expression:
1)0.90<f1/f<1.40；2)1.40<|f2/f|<2.20；3)1.10<f3/f<2.00；
Wherein, the focal length of these the first lens is f1, and the focal length of these the second lens is f2, the focal length of the 3rd lens is f3, and system focal length is f.
Preferred as one, described first lens and the 3rd lens are positive lens; Described second lens are negative lens.
Preferred as one, described first lens are biconvex lens; Described second lens are plano-concave lens, biconcave lens or meniscus shaped lens; Described 3rd lens are non-spherical lens.
Preferred as one, the described thing side of the 3rd lens and the aspheric surface expression formula in face, image side are:
Wherein, Y is the distance of point in aspheric curve and optical axis I; Z is the aspheric degree of depth (in aspheric surface, distance optical axis I is the point of Y, with the tangent plane being tangential on summit on aspheric surface optical axis I, vertical range between the two); R is the radius-of-curvature of lens surface; K is conical surface coefficient (conicconstant); a
2iit is 2i rank asphericity coefficient.
Preferred as one, described 3rd lens thing side to the distance of described image source face on optical axis is BFL, the thickness of described 3rd lens on optical axis is T3, described second lens and described 3rd clearance of lens on optical axis are G23, and meet following relationship: BFL/T3<3.00; T3/G23≤71; BFL/G23≤105.
Preferred as one, described first lens and described second lens are bonded mutually by light-sensitive emulsion; The focal length that these first lens and this second lens glue synthesize cemented doublet is f12, the thickness of described first lens on optical axis is T1, the thickness of described second lens on optical axis is T2, the thickness of cemented doublet on optical axis that described first lens and described second lens compose is T12, and also meets following relationship: T1/T2≤3.5; T12=T1+T2; T12/T3≤0.75; 1.50<f12/f<3.20.
Preferred as one, the material of described first lens and the second lens is glass, and the material of described 3rd lens is plastics.
Preferred as one, face, image side to the distance of described image source face on optical axis of described first lens is TTL, and described first lens, the second lens and the thickness summation of the 3rd lens on optical axis are ALT, and meet following relationship: BFL/TTL≤0.30; ALT/TTL≤0.70; ALT/T12≤1.35.
The beneficial effect of optical eyepiece camera lens of the present invention is: described first lens and the 3rd lens are positive lens; Described second lens are negative lens; Described first lens are biconvex lens; Described second lens are plano-concave lens, biconcave lens or meniscus shaped lens; Described 3rd lens are non-spherical lens; By the optical parametric of these first lens, the second lens and the 3rd lens selection with mutually arrange in pairs or groups, contribute to correction aberration, promote the image quality of this optical eyepiece camera lens.In addition, these first lens and the second lens are glass material, and its larger refractive index can be transferred light better; These first lens and this second lens glue synthesize one group of balsaming lens, can carry out good corrective action to aberration; 3rd lens are plastic material, can reduce manufacturing cost and alleviate the weight of this optical eyepiece camera lens.
Therefore, another object of the present invention, namely wears display device what provide a kind of application of aforementioned optical eyepiece camera lens.
So, of the present inventionly wear display device, comprise casing and be arranged on the display module in this casing.
This display module comprises as the optical eyepiece camera lens as described in aforementioned and the image source display being arranged at this optical eyepiece camera lens thing side.
Preferred as one, the total length of described optical eyepiece camera lens is less than 45mm.The total length of described optical eyepiece camera lens be by described diaphragm to the total length of the image source display of thing side, comprise the emergent pupil distance of reserved at least 20mm.
Preferred as one, the observation station for human eye observation of described eyepiece camera lens and the distance of face, image side on optical axis of described first lens are greater than 20mm.
This image source display selects display resolution to be 0.37 inch of LCOS display screen of WXGA (1366*768), compared with traditional micro-display screen, the pixel dimension of this LCOS display screen is much smaller, the phenomenon producing particle after being amplified by optical eyepiece camera lens can be effectively reduced, improve Consumer's Experience.
The beneficial effect that the present invention wears display device is: by loading the display module with aforesaid optical eyepiece camera lens in the device, in order to this eyepiece camera lens under the condition shortening system length, the advantage of good optical property still can be provided, make when not sacrificing optical property more slim lightly wear display device, make the present invention have good Practical Performance concurrently and contribute to the structural design of compactization, to meet higher-quality consumption demand.
Below in conjunction with drawings and Examples, the present invention is described in further detail; But a kind of optical eyepiece camera lens of the present invention and wear display device and be not limited to embodiment.
Accompanying drawing explanation
Fig. 1 is the configuration schematic diagram of the optical eyepiece camera lens of first embodiment of the invention;
Fig. 2 is the longitudinal spherical aberration of first embodiment of the invention and every aberration diagram;
Fig. 3 is the tabular drawing of the optical data of each lens of first embodiment of the invention;
Fig. 4 is the tabular drawing of the asphericity coefficient of each lens of first embodiment of the invention;
Fig. 5 is the configuration schematic diagram of the optical eyepiece camera lens of second embodiment of the invention;
Fig. 6 is the longitudinal spherical aberration of second embodiment of the invention and every aberration diagram;
Fig. 7 is the tabular drawing of the optical data of each lens of second embodiment of the invention;
Fig. 8 is the tabular drawing of the asphericity coefficient of each lens of second embodiment of the invention;
Fig. 9 is the configuration schematic diagram of the optical eyepiece camera lens of third embodiment of the invention;
Figure 10 is the longitudinal spherical aberration of third embodiment of the invention and every aberration diagram;
Figure 11 is the tabular drawing of the optical data of each lens of third embodiment of the invention;
Figure 12 is the tabular drawing of the asphericity coefficient of each lens of third embodiment of the invention;
Figure 13 is the configuration schematic diagram of the optical eyepiece camera lens of fourth embodiment of the invention;
Figure 14 is the longitudinal spherical aberration of fourth embodiment of the invention and every aberration diagram;
Figure 15 is the tabular drawing of the optical data of each lens of fourth embodiment of the invention;
Figure 16 is the tabular drawing of the asphericity coefficient of each lens of fourth embodiment of the invention;
Figure 17 is the configuration schematic diagram of the optical eyepiece camera lens of fifth embodiment of the invention;
Figure 18 is the longitudinal spherical aberration of fifth embodiment of the invention and every aberration diagram;
Figure 19 is the tabular drawing of the optical data of each lens of fifth embodiment of the invention;
Figure 20 is the tabular drawing of the asphericity coefficient of each lens of fifth embodiment of the invention;
Figure 21 is the configuration schematic diagram of the optical eyepiece camera lens of sixth embodiment of the invention;
Figure 22 is the longitudinal spherical aberration of sixth embodiment of the invention and every aberration diagram;
Figure 23 is the tabular drawing of the optical data of each lens of sixth embodiment of the invention;
Figure 24 is the tabular drawing of the asphericity coefficient of each lens of sixth embodiment of the invention;
Figure 25 is the configuration schematic diagram of the optical eyepiece camera lens of seventh embodiment of the invention;
Figure 26 is the longitudinal spherical aberration of seventh embodiment of the invention and every aberration diagram;
Figure 27 is the tabular drawing of the optical data of each lens of seventh embodiment of the invention;
Figure 28 is the tabular drawing of the asphericity coefficient of each lens of seventh embodiment of the invention;
Figure 29 is the configuration schematic diagram of the optical eyepiece camera lens of eighth embodiment of the invention;
Figure 30 is the longitudinal spherical aberration of eighth embodiment of the invention and every aberration diagram;
Figure 31 is the tabular drawing of the optical data of each lens of eighth embodiment of the invention;
Figure 32 is the tabular drawing of the asphericity coefficient of each lens of eighth embodiment of the invention;
Figure 33 is the tabular drawing one of the first embodiment of the present invention to the optical parametric of the 8th embodiment;
Figure 34 is the tabular drawing two of the first embodiment of the present invention to the optical parametric of the 8th embodiment.
Embodiment
Before the present invention is described in detail, should be noted that in the following description content, similar assembly represents with identical numbering.
This section of instructions is sayed it " lens have positive refractive index (or negative refractive index) ", refers to that described lens have positive refractive index (or negative refractive index) at optical axis near zone." the thing side (or face, image side) of lens has the convex surface part (or concave part) being positioned at certain region ", refer to that this region is close to the exterior lateral area in this region in radial direction, towards being parallel to the direction of optical axis more " outwardly convex " (or " caving inward ")." optical axis near zone " refers to the optical axis near zone of this curved surface only supplying imaging light to pass through.In addition, these lens also comprise extension, are loaded in optical eyepiece camera lens with for this lens combination, and desirable imaging light can't pass through extension, and embodiment is below the extension asking illustrative simplicity all to eliminate part.
First embodiment
Consult Fig. 1 and Fig. 3, optical eyepiece camera lens 10 first embodiment of the present invention, sequentially comprise diaphragm 2, first lens 3, second lens 4, the 3rd lens 5 and cover glass 6 from observation side to image source along optical axis I.When the light sent by display screen 100 enters optical eyepiece camera lens 10, via after cover glass 6, the 3rd lens 5, second lens 4, first lens 3 and diaphragm 2, enter human eye, and form the image of a upright amplification.Supplementary notes, thing side is towards the side of image source, and image side is towards the side of observer.
Wherein, the first lens 3, second lens 4, the 3rd lens 5 and cover glass 6 have all respectively towards image side and the face, image side 31,41,51,61 that imaging light is passed through, and towards thing side and the thing side 32,42,52,62 making imaging light pass through.Wherein, face, image side 31,41 and thing side 32,42 are all sphere.Face, image side 51 and thing side 52 are aspheric surface.
In addition, in order to meet the light-weighted demand of product, first lens 3 and the second lens 4 for possess high index of refraction glass material made by, the 3rd lens 5 are for possessing refractive index and be made by plastic material, but the material of the first lens 3 and the second lens 4 is not still as restriction.
First lens 3 are the lens of positive refractive index.The face, image side 31 of the first lens 3 is convex surface, and the thing side 32 of the first lens 3 is convex surface.Second lens 4 are the lens of negative refractive index.The face, image side 41 of the second lens 4 is concave surface, and the thing side 42 of the second lens 4 is plane.3rd lens 5 are the lens of positive refractive index, the thing side 52 that the face, image side 51 of the 3rd lens 5 has the convex surface part 511 being positioned at optical axis I near zone and convex surface part the 512, three lens 5 being positioned at circumference near zone has the convex surface part 521 being positioned at optical axis I near zone and the convex surface part 522 being positioned at circumference near zone.
In the present first embodiment, said lens is only had to have refractive index.
During usual human eye normal observation things, pupil diameter size is between 2-4mm, and for ease of statement, current pupil diameter gets average 3mm.
Other detailed optical data of this first embodiment as shown in Figure 3, and the total system focal length (effectivefocallength of this first embodiment, be called for short EFL) be 12.71mm, half angle of view (halffieldofview, be called for short HFOV) be 20.5 °, exit pupil diameter is 3mm, its system length is 40.34mm.Wherein, this system length refers to by the position of diaphragm 2 to the distance image source face 100 is on optical axis I.
In addition, the face, image side 51 of the 3rd lens 5 and thing side 52, amounting to two faces is all aspheric surfaces, and this aspheric surface is according to following formula definition:
Wherein: Y: the point in aspheric curve and the distance of optical axis I; Z: the aspheric degree of depth (in aspheric surface, distance optical axis I is the point of Y, with the tangent plane being tangential on summit on aspheric surface optical axis I, and vertical range between the two); R: the radius-of-curvature of lens surface; K: conical surface coefficient (conicconstant); a
2i: 2i rank asphericity coefficient.
The face, image side 51 of the 3rd lens 5 and the thing side 52 every asphericity coefficient in formula (1) as shown in Figure 4.Wherein, in Fig. 4, field number 51 represents that it is the asphericity coefficient in the 3rd face, lens 5 image side 51, and the rest may be inferred for other field.
In addition, the relation in the optical eyepiece camera lens 10 of this first embodiment between each important parameter is as shown in Figure 33 and Figure 34.
Wherein: T1 is the thickness of the first lens 3 on optical axis I; T2 is the thickness of the second lens 4 on optical axis I; T12 is the thickness of balsaming lens on optical axis I that the first lens 3 and the second lens 4 glue together; T3 is the thickness of the 3rd lens 5 on optical axis I; G23 is the second clearance of lens 4 to the three lens 5 on optical axis I; G3CG is the 3rd lens 5 to the clearance of cover glass 6 on optical axis I; TCG is the thickness of cover glass 6 on optical axis I; GCD is the clearance of cover glass 6 to image source face 100 on optical axis I; ALT is the first lens 3, second lens 4 and the thickness summation of the 3rd lens 5 on optical axis I, i.e. T1, T2, T3 sum; TTL is the distance of face, image side 31 to image source face 100 on optical axis I of the first lens 3; BFL is the distance of thing side 52 to image source face 100 on optical axis I of the 3rd lens 5, i.e. G3CG, TCG, GCD sum; FFL is the distance of diaphragm 2 to image source face 100 on optical axis I; F is the system focal length of optical eyepiece camera lens 10; F1 is the focal length of the first lens 3; F2 is the focal length of the second lens 4; F12 is the focal length that the first lens 3 and the second lens 4 compose cemented doublet; F3 is the focal length of the 3rd lens 5.
Coordinate again and consult Fig. 2, (a) illustrate this first embodiment distortion aberration (distortionaberration) on image source face 100, b () and the diagram of (c) then illustrate this first embodiment respectively about the astigmatic image error (astigmatismaberration) in meridian (tangential) direction and the astigmatic image error in the sagitta of arc (sagittal) direction on image source face 100, the diagram of (d) then illustrates the longitudinal spherical aberration (longitudinalsphericalaberration) of this first embodiment.The distortion aberration that the distortion aberration diagram of Fig. 2 (a) then show this first embodiment maintains ± scope of 2% in, illustrate that the distortion aberration of basis first embodiment has met the image quality requirement of optical system.In two astigmatic image errors of Fig. 2 (b) and (c) illustrates, three kinds represent the focal length variations amount of wavelength in whole field range and drop on ± 0.5mm in, illustrate that the optical system of first embodiment effectively can eliminate aberration.
And in the longitudinal spherical aberration pictorial image 2 (d) of this first embodiment, curve formed by each wavelength all very close to and close to centre, illustrate that the Off-axis-light of each wavelength differing heights all concentrates near imaging point, can be found out by the skewness magnitude level of the curve of each wavelength, the imaging point deviation of the Off-axis-light of differing heights controls within the scope of ± 0.03mm, therefore the present embodiment obviously improves the spherical aberration of phase co-wavelength really, in addition, three kinds to represent wavelength distance to each other also quite close, the image space representing different wave length light is quite concentrated, thus chromatic aberation is made also to obtain obvious improvement.Illustrate that this first embodiment is compared to existing optical lens accordingly, foreshortened to 40.34mm in system length keeps emergent pupil apart under the condition of 20mm simultaneously, still can provide preferably image quality, therefore this first embodiment under the condition maintaining favorable optical performance, can shorten lens length to realize the product design of slimming more.
Second embodiment
Consult Fig. 5, for the second embodiment of optical eyepiece camera lens 10 of the present invention, it is roughly similar to described first embodiment, wherein, the main difference part of this second embodiment and described first embodiment is: the thing side 42 of the second lens 4 is convex surface (42), and the thing side 52 of the 3rd lens 5 has the concave part 522 being positioned at circumference near zone, should be noted at this, in order to clearly illustrate drawing, in Fig. 5, omit the label of the concave part identical with the first embodiment and convex surface part.
As shown in Figure 7, and the total system focal length of this second embodiment is 12.69mm to its detailed optical data, and half angle of view (HFOV) is 20.5 °, exit pupil diameter is 3mm, and system length is then 41.49mm.As shown in Figure 8, be then that the face, image side 51 of the 3rd lens 5 of this second embodiment is to the every asphericity coefficient of thing side 52 in formula (1).
In addition, the relation in the optical eyepiece camera lens 10 of this second embodiment between each important parameter is as shown in Figure 33 and Figure 34.
Coordinate and consult Fig. 6, by the astigmatic image error of the distortion aberration of (a), (b), (c), and the longitudinal spherical aberration diagram of (d) can find out that this second embodiment also can maintain favorable optical performance.
3rd embodiment
Consult Fig. 9, for the 3rd embodiment of optical eyepiece camera lens 10 of the present invention, it is roughly similar to described first embodiment, parameter only between each optical data, asphericity coefficient and lens 3,4,5 is some difference more or less, should be noted at this, in order to clearly illustrate drawing, in Fig. 9, omit the label of the concave part identical with the first embodiment and convex surface part.
As shown in figure 11, and the total system focal length of this 3rd embodiment is 12.22mm to its detailed optical data, and half angle of view (HFOV) is 20.5 °, exit pupil diameter is 3mm, and system length is then 41.51mm.As shown in figure 12, be then that the face, image side 51 of the 3rd lens 5 of this 3rd embodiment is to the every asphericity coefficient of thing side 52 in formula (1).
In addition, the relation in the optical eyepiece camera lens 10 of this 3rd embodiment between each important parameter is as shown in Figure 33 and Figure 34.
Coordinate and consult Figure 10, by the astigmatic image error of the distortion aberration of (a), (b), (c), and the longitudinal spherical aberration diagram of (d) can find out that this 3rd embodiment also can maintain favorable optical performance.
4th embodiment
Consult Figure 13, for the 4th embodiment of optical eyepiece camera lens 10 of the present invention, it is roughly similar to described first embodiment, parameter only between each optical data, asphericity coefficient and lens 3,4,5 is some difference more or less, should be noted at this, in order to clearly illustrate drawing, in Figure 13, omit the label of the concave part identical with the first embodiment and convex surface part.
As shown in figure 15, and the total system focal length of this 4th embodiment is 12.71mm to its detailed optical data, and half angle of view (HFOV) is 20.5 °, exit pupil diameter is 3mm, and system length is then 42.38mm.As shown in figure 16, be then that the face, image side 51 of the 3rd lens 5 of this 4th embodiment is to the every asphericity coefficient of thing side 52 in formula (1).
In addition, the relation in the optical eyepiece camera lens 10 of this 4th embodiment between each important parameter is as shown in Figure 33 and Figure 34.
Coordinate and consult Figure 14, by the astigmatic image error of the distortion aberration of (a), (b), (c), and the longitudinal spherical aberration diagram of (d) can find out that this 4th embodiment also can maintain favorable optical performance.
5th embodiment
Consult Figure 17, for the 5th embodiment of optical eyepiece camera lens 10 of the present invention, it is roughly similar to described first embodiment, wherein, the main difference part of this 5th embodiment and described first embodiment is: the thing side 42 of the second lens 4 is concave surface (42), at this it is noted that in order to clearly illustrate drawing, in Figure 17, omit the label of the concave part identical with the first embodiment and convex surface part.
As shown in figure 19, and the total system focal length of this 5th embodiment is 12.78mm to its detailed optical data, and half angle of view (HFOV) is 20.5 °, exit pupil diameter is 3mm, and system length is then 41.51mm.As shown in figure 20, be then that the face, image side 51 of the 3rd lens 5 of this 5th embodiment is to the every asphericity coefficient of thing side 52 in formula (1).
In addition, the relation in the optical eyepiece camera lens 10 of this 5th embodiment between each important parameter is as shown in Figure 33 and Figure 34.
Coordinate and consult Figure 18, by the astigmatic image error of the distortion aberration of (a), (b), (c), and the longitudinal spherical aberration diagram of (d) can find out that this 5th embodiment also can maintain favorable optical performance.
6th embodiment
Consult Figure 21, for the 6th embodiment of optical eyepiece camera lens 10 of the present invention, it is roughly similar to described first embodiment, wherein, the main difference part of this 6th embodiment and described first embodiment is: the thing side 42 of the second lens 4 is convex surface (42), at this it is noted that in order to clearly illustrate drawing, in Figure 21, omit the label of the concave part identical with the first embodiment and convex surface part.
As shown in figure 23, and the total system focal length of this 6th embodiment is 12.72mm to its detailed optical data, and half angle of view (HFOV) is 20.5 °, exit pupil diameter is 3mm, and system length is then 43.96mm.As shown in figure 24, be then that the face, image side 51 of the 3rd lens 5 of this 6th embodiment is to the every asphericity coefficient of thing side 52 in formula (1).
In addition, the relation in the optical eyepiece camera lens 10 of this 6th embodiment between each important parameter is as shown in Figure 33 and Figure 34.
Coordinate and consult Figure 22, by the astigmatic image error of the distortion aberration of (a), (b), (c), and the longitudinal spherical aberration diagram of (d) can find out that this 6th embodiment also can maintain favorable optical performance.
7th embodiment
Consult Figure 25, for the 7th embodiment of optical eyepiece camera lens 10 of the present invention, it is roughly similar to described first embodiment, parameter only between each optical data, asphericity coefficient and lens 3,4,5 is some difference more or less, should be noted at this, in order to clearly illustrate drawing, in Figure 25, omit the label of the concave part identical with the first embodiment and convex surface part.
As shown in figure 27, and the total system focal length of this 7th embodiment is 12.74mm to its detailed optical data, and half angle of view (HFOV) is 20.5 °, exit pupil diameter is 3mm, and system length is then 44.31mm.As shown in figure 28, be then that the face, image side 51 of the 3rd lens 5 of this 7th embodiment is to the every asphericity coefficient of thing side 52 in formula (1).
In addition, the relation in the optical eyepiece camera lens 10 of this 7th embodiment between each important parameter is as shown in Figure 33 and Figure 34.
Coordinate and consult Figure 26, by the astigmatic image error of the distortion aberration of (a), (b), (c), and the longitudinal spherical aberration diagram of (d) can find out that this 7th embodiment also can maintain favorable optical performance.
8th embodiment
Consult Figure 29, for the 8th embodiment of optical eyepiece camera lens 10 of the present invention, it is roughly similar to described first embodiment, wherein, the main difference part of this 8th embodiment and described first embodiment is: the face, image side 51 of the 3rd lens 5 is concave surface, and there is the concave part 511 being positioned at optical axis I near zone, the thing side 52 of the 3rd lens 5 is convex surface, and there is the concave part 522 being positioned at circumference near zone, should be noted at this, in order to clearly illustrate drawing, in Figure 29, omit the label of the concave part identical with the first embodiment and convex surface part.
As shown in figure 31, and the total system focal length of this 8th embodiment is 12.70mm to its detailed optical data, and half angle of view (HFOV) is 20.5 °, exit pupil diameter is 3mm, and system length is then 40.43mm.As shown in figure 32, be then that the face, image side 51 of the 3rd lens 5 of this 8th embodiment is to the every asphericity coefficient of thing side 52 in formula (1).
In addition, the relation in the optical eyepiece camera lens 10 of this 8th embodiment between each important parameter is as shown in Figure 33 and Figure 34.
Coordinate and consult Figure 30, by the astigmatic image error of the distortion aberration of (a), (b), (c), and the longitudinal spherical aberration diagram of (d) can find out that this 8th embodiment also can maintain favorable optical performance.
Coordinate again and consult Figure 33 and Figure 34, for the tabular drawing of every optical parametric of above-mentioned eight better enforcements, when relational expression when between the every optical parametric in optical eyepiece camera lens 10 of the present invention meets following relationship, when system length shortens, still preferably optical property performance is had, the present invention is applied to relevant when wearing display device, the product of slimming more can be made:
(1) T3/G23≤71, BFL/G23≤105, G23 is the second lens 4 and the 3rd gap of lens 5 on optical axis I, the diopter of cemented doublet synthesized due to the first lens and the second lens glue and the diopter of the 3rd lens are just, and want to obtain larger magnification, namely less system focal length, need to reduce G23, but unconfinedly can not reduce with existing processing and assembly technology G23, reduce so G23 is more difficult, therefore preferably T3/G23, BFL/G23 will become little design.More preferably, 7.2≤T3/G23≤71,7.5≤BFL/G23≤105.
(2) T1/T2≤3.50, T12/T3≤0.75, ALT/T12≤1.70, ALT/TTL≤0.70, BFL/T3≤1.00, BFL/TTL≤0.30, because the requirement of image quality is more and more higher, the length of optical eyepiece camera lens 10 needs again to do less and less, so each lens often have different changes because considering the path of light from the face type of circumference near zone near optical axis I, therefore also can difference to some extent in the thickness size of optical eyepiece camera lens 10 centerand edge, consider the characteristic of light, the light at edge more needs just to focus on image source face 100 with light incident near optical axis I in optical eyepiece camera lens 10 inside through the refraction of larger angle, so the thickness of each lens and each clearance need collocation mutually, optical eyepiece camera lens 10 just can be made to have good image quality, and focal length and optical eyepiece camera lens 10 length and thickness, gap length is all relevant, therefore when meeting this little relational expression, can allow each thickness of optical eyepiece camera lens 10, gap, focal length has good configuration.Preferably, 3.50≤T1/T2≤8.00,0.75≤T12/T3≤3.00,1.35≤ALT/T12≤2.30,0.55≤ALT/TTL≤0.70,1.00≤BFL/T3≤3.00,0.30≤BFL/TTL≤0.45.
Conclude above-mentioned, optical eyepiece camera lens 10 of the present invention, can obtain following effect and advantage, therefore can reach object of the present invention:
One, by the high index of refraction of the first lens 3 and thing side, face, image side is convex surface, light angle of can effectively transferring, can help optical eyepiece camera lens optically focused; The negative diopter of further collocation second lens 4, effectively can correct the peripheral vision light of too restraining, and avoids peripheral vision to produce the larger curvature of field; And the material of the 3rd lens 5 is plastics, be conducive to the weight and the minimizing cost that alleviate optical eyepiece camera lens 10.
Two, the face, image side 31 by the first lens 3 has convex surface, larger guarantee observation station can be greater than 20mm apart from the distance of lens on optical axis, thus effectively promote experience sense.
Three, the balsaming lens, the non-spherical surface in face, image side 51 of the 3rd lens 5, the non-spherical surface of the thing side 52 of the 3rd lens 5 that compose of the first lens 3 and the second lens 4, collocation helps correction aberration, the image quality of improving optical eyepiece camera lens 10 mutually.
Four, the present invention is by the control of relevant design parameter, whole system is had and preferably eliminates aberration ability, such as eliminate the ability of spherical aberration, the concaveconvex shape of fit lens 3,4,5 face, image side 31,41,51 or thing side 32,42,52 designs and arrangement again, make optical eyepiece camera lens 10 under the condition shortening system length, still possess the optical property that effectively can overcome chromatic aberation, and preferably image quality is provided.
Five, by the explanation of aforementioned eight embodiments, show the design of optical eyepiece camera lens 10 of the present invention, the system length of aforementioned eight embodiments all can shorten to below 45mm, compared to existing optical eyepiece camera lens, apply the product that camera lens of the present invention can produce more slimming, economic benefit the present invention being had accord with the demands of the market.
Above-described embodiment is only used for further illustrating a kind of optical eyepiece camera lens of the present invention and wearing display device; but the present invention is not limited to embodiment; every above embodiment is done according to technical spirit of the present invention any simple modification, equivalent variations and modification, all fall in the protection domain of technical solution of the present invention.
Claims (10)
1. an optical eyepiece camera lens, it is characterized in that: sequentially comprise diaphragm, the first lens, the second lens and the 3rd lens from human eye observation side to image source along optical axis, and these first lens, the second lens and the 3rd lens all have refractive index, and comprise respectively one towards observation side and the face, image side and that imaging light is passed through towards image source side and the thing side making imaging light pass through;
And these first lens, the second lens, the 3rd lens meet following requirement:
Nd1>1.88，Nd2>1.94，Nd3>1.49；
Vd1<40.9，Vd2<18.0，Vd3<57.4；
Wherein, Nd1, Nd2, Nd3 represent that the first lens, the second lens, the 3rd lens are in the refractive index of d line respectively; Vd1, Vd2, Vd3 represent that the first lens, the second lens, the 3rd lens are at the abbe number of d line respectively;
Described first lens, the second lens, the 3rd lens meet following relational expression:
1)0.90<f1/f<1.40；
2)1.40<|f2/f|<2.20；
3)1.10<f3/f<2.00；
Wherein, the focal length of these the first lens is f1, and the focal length of these the second lens is f2, and the focal length of the 3rd lens is f3, and system focal length is f.
2. a kind of optical eyepiece camera lens according to claim 1, is characterized in that: described first lens and the 3rd lens are positive lens; Described second lens are negative lens.
3. a kind of optical eyepiece camera lens according to claim 1, is characterized in that: described first lens are biconvex lens; Described second lens are plano-concave lens, biconcave lens or meniscus shaped lens; Described 3rd lens are non-spherical lens; The described thing side of the 3rd lens and the aspheric surface expression formula in face, image side are:
Wherein, Y is the distance of point in aspheric curve and optical axis I; Z is the aspheric degree of depth (in aspheric surface, distance optical axis I is the point of Y, with the tangent plane being tangential on summit on aspheric surface optical axis I, vertical range between the two); R is the radius-of-curvature of lens surface; K is conical surface coefficient (conicconstant); a
2iit is 2i rank asphericity coefficient.
4. a kind of optical eyepiece camera lens according to claim 1, it is characterized in that: described 3rd lens thing side to the distance of described image source face on optical axis is BFL, the thickness of described 3rd lens on optical axis is T3, described second lens and described 3rd clearance of lens on optical axis are G23, and meet following relationship:
BFL/T3<3.00；
T3/G23≦71；
BFL/G23≦105。
5. a kind of optical eyepiece camera lens according to claim 4, is characterized in that: described first lens and described second lens are bonded mutually by light-sensitive emulsion; The focal length that these first lens and this second lens glue synthesize cemented doublet is f12, the thickness of described first lens on optical axis is T1, the thickness of described second lens on optical axis is T2, the thickness of cemented doublet on optical axis that described first lens and described second lens compose is T12, and also meets following relationship:
T1/T2≧3.5；
T12＝T1+T2；
T12/T3≧0.75；
1.50<f12/f<3.20。
6. a kind of optical eyepiece camera lens according to claim 1, is characterized in that: the material of described first lens and the second lens is glass, and the material of described 3rd lens is plastics.
7. a kind of optical eyepiece camera lens according to claim 5, it is characterized in that: face, image side to the distance of described image source face on optical axis of described first lens is TTL, described first lens, the second lens and the thickness summation of the 3rd lens on optical axis are ALT, and meet following relationship:
BFL/TTL≧0.30；
ALT/TTL≦0.70；
ALT/T12≧1.35。
8. wear a display device, it is characterized in that: comprise casing and display module, wherein display module comprises just like the optical eyepiece camera lens described in claim 1 to any one of claim 7 and the image source display being arranged at this optical eyepiece camera lens thing side.
9. one according to claim 8 wears display device, it is characterized in that: the total length of described optical eyepiece camera lens is less than 45mm, the observation station for human eye observation of described optical eyepiece camera lens and the distance of face, image side on optical axis of described first lens are greater than 20mm.
10. one according to claim 8 wears display device, it is characterized in that: described image source display selects display resolution to be 0.37 inch of LCOS display screen of WXGA (1366*768).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810185440.7A CN108415152B (en) | 2015-11-16 | 2015-11-16 | Optical eyepiece lens for head-mounted display equipment |
| CN201810187492.8A CN108398785B (en) | 2015-11-16 | 2015-11-16 | Head-mounted display device adopting optical eyepiece lens and image source display screen |
| CN201810187470.1A CN108303795B (en) | 2015-11-16 | 2015-11-16 | Optical eyepiece lens for head-mounted display device |
| CN201510783264.3A CN105388609B (en) | 2015-11-16 | 2015-11-16 | A kind of optical eyepiece camera lens and wear display equipment |
| CN201810185453.4A CN108398784B (en) | 2015-11-16 | 2015-11-16 | Head-mounted display device adopting optical eyepiece lens |
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| CN201510783264.3A CN105388609B (en) | 2015-11-16 | 2015-11-16 | A kind of optical eyepiece camera lens and wear display equipment |
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| CN201810187470.1A Division CN108303795B (en) | 2015-11-16 | 2015-11-16 | Optical eyepiece lens for head-mounted display device |
| CN201810185453.4A Division CN108398784B (en) | 2015-11-16 | 2015-11-16 | Head-mounted display device adopting optical eyepiece lens |
| CN201810185440.7A Division CN108415152B (en) | 2015-11-16 | 2015-11-16 | Optical eyepiece lens for head-mounted display equipment |
| CN201810187492.8A Division CN108398785B (en) | 2015-11-16 | 2015-11-16 | Head-mounted display device adopting optical eyepiece lens and image source display screen |
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| CN105388609A true CN105388609A (en) | 2016-03-09 |
| CN105388609B CN105388609B (en) | 2018-10-02 |
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| CN201810185453.4A Active CN108398784B (en) | 2015-11-16 | 2015-11-16 | Head-mounted display device adopting optical eyepiece lens |
| CN201810187470.1A Active CN108303795B (en) | 2015-11-16 | 2015-11-16 | Optical eyepiece lens for head-mounted display device |
| CN201510783264.3A Expired - Fee Related CN105388609B (en) | 2015-11-16 | 2015-11-16 | A kind of optical eyepiece camera lens and wear display equipment |
| CN201810185440.7A Active CN108415152B (en) | 2015-11-16 | 2015-11-16 | Optical eyepiece lens for head-mounted display equipment |
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| CN201810185453.4A Active CN108398784B (en) | 2015-11-16 | 2015-11-16 | Head-mounted display device adopting optical eyepiece lens |
| CN201810187470.1A Active CN108303795B (en) | 2015-11-16 | 2015-11-16 | Optical eyepiece lens for head-mounted display device |
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| JP7374688B2 (en) | 2019-09-27 | 2023-11-07 | キヤノン株式会社 | image display device |
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| CN111240030B (en) * | 2020-03-27 | 2022-06-21 | 歌尔光学科技有限公司 | Optical assembly and head-mounted display device |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN108303795A (en) | 2018-07-20 |
| CN105388609B (en) | 2018-10-02 |
| CN108398784B (en) | 2019-12-20 |
| CN108415152B (en) | 2020-04-07 |
| CN108398784A (en) | 2018-08-14 |
| CN108398785B (en) | 2020-11-20 |
| CN108415152A (en) | 2018-08-17 |
| CN108398785A (en) | 2018-08-14 |
| CN108303795B (en) | 2020-10-30 |
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