CN205450452U - Eyepiece camera lens, wear and show optical system and head -mounted apparatus - Google Patents
Eyepiece camera lens, wear and show optical system and head -mounted apparatus Download PDFInfo
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- CN205450452U CN205450452U CN201521141024.5U CN201521141024U CN205450452U CN 205450452 U CN205450452 U CN 205450452U CN 201521141024 U CN201521141024 U CN 201521141024U CN 205450452 U CN205450452 U CN 205450452U
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- eyepiece camera
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Abstract
The utility model discloses an eyepiece camera lens, wear and show optical system and head -mounted apparatus, the eyepiece camera lens adopts single positive lens, the positive lens has the first surface of protruding phototropic emitting direction and the second surface of protruding phototropic incident direction, and first surface and second surface are the aspheric surface, and satisfies following face type parameter and relation: the radius absolute value of first surface is r1, and the quadratic term coefficient is k1, and the radius absolute value of second surface is r2, and the quadratic term coefficient is k2, and the thickness of positive lens is d, and total focus of the optical system that the positive lens corresponds is f, wherein, 49 < r1 < 150, 20 < r2 < 40, 0.3 < r1r2 < 0.45, - 3 < k1 < 0.5, - 3 < k2 < 0.5, 33 < f < 40, 0.45 < fr1 < 0.65, 1.2 < fr2 < 1.8, 2.6 < fd < 3. The utility model discloses a to eyepiece camera lens appropriate allocation face type parameter, effectively kept balance wearing the angle of vision and the light -weighted requirement that shows optical system, reached better display effect.
Description
Technical field
This utility model relates to lens design field, particularly to a kind of eyepiece camera lens, wears display optical system and helmet.
Background technology
Wearing display optical system is an image enhancement system based on display screen, image produced by display screen amplifies by optical system, present the virtual image amplified at a certain distance from before human eye, make user to be immersed in completely among virtual sight, do not disturbed by external information.In many applications, the user wearing display optical system is mobile operation, and this just requires optical system compact conformation, lightweight on the basis of ensureing image quality, and has bigger visual field.
The design challenges wearing display optical system is that the focal power increase of optical system can cause the increase of lens face type curvature, and eyeglass can become increasingly to rouse, so that the weight wearing display optical system increases, optical aberration increases therewith.
Therefore, how to solve the focal power wearing display optical system and conflict with light-weighted, be currently to wear problem demanding prompt solution in display optical system road for development.
Utility model content
In view of the above problems, this utility model provides a kind of eyepiece camera lens, wears display optical system and helmet, to solve the problems referred to above or to solve the problems referred to above at least in part.
For reaching above-mentioned purpose, the technical solution of the utility model is achieved in that
On the one hand, this utility model provides a kind of eyepiece camera lens, this eyepiece camera lens uses single plus lens, described plus lens has the first surface being convex to light exit direction and the second surface being convex to light incident direction, described first surface and described second surface are aspheric surface, and meet following face shape parameter and relation:
The radius absolute value of described first surface is r1, and quadratic term coefficient is k1, and the radius absolute value of described second surface is r2, and quadratic term coefficient is k2, and the thickness of described plus lens is d, and total focal length of the optical system that described plus lens is corresponding is f；Wherein,
49 ＜ r1 ＜ 150,20 ＜ r2 ＜ 40,0.3 ＜ r1/r2 ＜ 0.45；
-3 ＜ k1 ＜-0.5 ,-3 ＜ k2 ＜-0.5；
33 ＜ f ＜ 40；
0.45 ＜ f/r1 ＜ 0.65,1.2 ＜ f/r2 ＜ 1.8,2.6 ＜ f/d ＜ 3.
Preferably, the back focal length of the optical system that described plus lens is corresponding is L, 23 ＜ L ＜ 34.
Preferably, the ranges of indices of refraction of described plus lens is 1.45 ＜ n ＜ 1.70, and dispersion range is 50 ＜ v ＜ 75.
It is further preferred that described plus lens uses the COP cyclic olefin polymer of K26r model.
It is further preferred that the refractive index of described plus lens is n=1.535, dispersion is v=56.
On the other hand, this utility model provides one and wears display optical system, and this is worn display optical system and includes successively against light direction: diaphragm, the eyepiece camera lens that such scheme provides, and display screen.
Preferably, described diaphragm is positioned at human eye pupil.
Another aspect, this utility model provides a kind of helmet, wears display optical system including what such scheme provided.
The technical scheme that this utility model provides has the advantages that 1, uses the eyepiece camera lens of single plus lens, and simple in construction, volume are little, lightweight, alleviate burden for users；2, by the relation between the face shape parameter of reasonable disposition plus lens and each face shape parameter, it is thus achieved that the big angle of visual field of 96 °, active balance wears the angle of visual field of display optical system and light-weighted requirement；3, using the eyepiece camera lens of aspherical plastic lens, cost is relatively low, is beneficial to produce in enormous quantities.
Accompanying drawing explanation
The eyepiece camera lens schematic diagram that Fig. 1 provides for this utility model embodiment；
Fig. 2 is the operation principle schematic diagram wearing display optical system；
The schematic diagram wearing display optical system that Fig. 3 provides for this utility model embodiment；
The curvature of field curve chart wearing display optical system that Fig. 4 provides for this utility model embodiment；
The distortion curve figure wearing display optical system that Fig. 5 provides for this utility model embodiment；
The point range figure wearing display optical system that Fig. 6 provides for this utility model embodiment.
Detailed description of the invention
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing, this utility model embodiment is described in further detail.
Embodiment one:
The eyepiece camera lens schematic diagram that Fig. 1 provides for the present embodiment, as shown in Figure 1, this eyepiece camera lens 120 uses single plus lens 121, plus lens 121 has the first surface S1 being convex to light exit direction and the second surface S2 being convex to light incident direction, first surface S1 and second surface S2 is aspheric surface, and meets following face shape parameter and relation:
The radius absolute value of first surface S1 is r1, and quadratic term coefficient is k1, and the radius absolute value of second surface S2 is r2, quadratic term coefficient is k2, the thickness of plus lens 121 is d, and total focal length of the optical system of plus lens 121 correspondence is f, and the back focal length of the optical system of plus lens 121 correspondence is L；Wherein,
49 ＜ r1 ＜ 150,20 ＜ r2 ＜ 40,0.3 ＜ r1/r2 ＜ 0.45；
-3 ＜ k1 ＜-0.5 ,-3 ＜ k2 ＜-0.5；
33 ＜ f ＜ 40；
0.45 ＜ f/r1 ＜ 0.65,1.2 ＜ f/r2 ＜ 1.8,2.6 ＜ f/d ＜ 3；
23 ＜ L ＜ 34.
In the present embodiment, the ranges of indices of refraction of plus lens 121 is 1.45 ＜ n ＜ 1.70, dispersion range is 50 ＜ v ＜ 75, owing to plastic material price is relatively low, the lightest, and plastic material is prone to addition and becomes aspherical types, this enforcement preferably employs COP (CycloOlefinPolymers) cyclic olefin polymer of K26r model, and its refractive index is n=1.535, and dispersion is v=56.
Wherein, COP cyclic olefin polymer it be an amorphous thermoplastic of class, there is the transparent copolymerized macromolecule of amorphism of cyclic olefin structure.
The eyepiece camera lens of the present embodiment uses extremely simple structure to be only made up of single plus lens, and the most logical bright finish of two of plus lens is aspheric surface, and two faces are the most easily processed into type, and weight and cost are the lowest simultaneously, it is adaptable to batch production；And the present embodiment passes through rationally to arrange the relation between the face shape parameter in two faces and each parameter so that the optical system that this single-positive-lens is constituted is obtained in that the big angle of visual field of 96 °.
Embodiment two:
The schematic diagram wearing display optical system that Fig. 2 provides for this utility model embodiment, as shown in Figure 2, light is sent by display screen and forms a huge virtual image at a distance first 2 meters of human eye after eyepiece lens imaging, human eye finding is this virtual image, the effect of optical system is similar with magnifier, and its purpose is exactly the information on amplifying display screen, then becomes the virtual image at a distance, make user to be immersed in completely among virtual sight, do not disturbed by external information.
The schematic diagram wearing display optical system that Fig. 3 provides for the present embodiment, includes as it is shown on figure 3, this wears display optical system against light direction: diaphragm 110, eyepiece camera lens 120 successively, and display screen 130.
Native system uses when design and moves back towards light path design, and in Fig. 3, image planes position is display screen 130, and object plane position is the virtual image produced by eyepiece camera lens 120, and diaphragm 110 is positioned at human eye pupil, and plus lens 121 makes the outer chief ray of the axle dissipated converge.
The eyepiece camera lens 120 wearing display optical system of the present embodiment is the eyepiece camera lens described in embodiment one, does not repeats them here.
In this example it is shown that screen 130 can use the LCD display of 5-6 inch.
Based on each parameter mentioned above, wear display optical system and achieve the angle of visual field of 96 °.When eyes are placed on diaphragm 110 position by the user wearing display optical system, and the light that display screen 130 sends forms the virtual image amplified after eyepiece camera lens 120 at first 2 meters of human eye.
Fig. 3 and Fig. 4 shows the curvature of field wearing display optical system and the distortion curve figure of the present embodiment, wherein Fig. 3 be curvature of field curve (FIELDCURVATURE), Fig. 4 be distortion curve (DISTORTION).
The curvature of field is a kind of aberration that object plane forms curved surface picture, need to characterize with meridianal curvature of field and Sagittal field curvature, as shown in Figure 3, in curvature of field curve, T line is meridianal curvature of field, and S line is Sagittal field curvature, and the difference between the two is the astigmatism of optical system, the curvature of field and astigmatism are the important aberrations affecting the outer field rays of optical system axis, the two is crossed conference and has a strong impact on the off-axis ray image quality of optical system, it can be seen that the curvature of field of optical system and astigmatism are all corrected in minimum scope.
Distortion does not affect the definition of optical system, but can cause the anamorphose of system, and for wide-angle lens, correcting distorted is extremely difficult, can be processed by later image and solve.
Fig. 4 shows the point range figure wearing display optical system of the present embodiment.Point range figure ignores diffraction effect, and reflection is the geometry of optical system imaging.In the point range figure of big aberration system, the distribution of point can represent the Energy distribution of a picture approx.Therefore, in image quality evaluation, the dense degree of available point range figure more intuitively reflects and weighs the quality of system imaging quality, and the RMS radius of point range figure is the least, it was demonstrated that the image quality of system is the best.As shown in Figure 4, wearing the point range figure RMS radius of optical system less than 220um, it is seen that the hot spot of each visual field is less, show that system capacity distribution is preferably optimized, aberration correction is relatively good.
Embodiment three:
Based on embodiment two wear the constructed design of display optical system, present embodiments provide a kind of helmet, this helmet includes wearing display optical system in embodiment two.
In sum, this utility model provides a kind of eyepiece camera lens, wears display optical system and helmet, face shape parameter by the plus lens of reasonable disposition eyepiece camera lens, achieve big visual field, light-weighted wear display optical system, compared with prior art, having the advantages that 1, use the eyepiece camera lens of single plus lens, simple in construction, volume are little, lightweight, alleviate burden for users；2, by the relation between the face shape parameter of reasonable disposition plus lens and each face shape parameter, it is thus achieved that the big angle of visual field of 96 °, active balance wears the angle of visual field of display optical system and light-weighted requirement；3, using the eyepiece camera lens of aspherical plastic lens, cost is relatively low, is beneficial to produce in enormous quantities.
The foregoing is only preferred embodiment of the present utility model, be not intended to limit protection domain of the present utility model.All any modification, equivalent substitution and improvement etc. made within spirit of the present utility model and principle, are all contained in protection domain of the present utility model.
Claims (8)
1. an eyepiece camera lens, this eyepiece camera lens uses single plus lens, described plus lens has the first surface being convex to light exit direction and the second surface being convex to light incident direction, it is characterized in that, described first surface and described second surface are aspheric surface, and meet following face shape parameter and relation:
The radius absolute value of described first surface is r1, and quadratic term coefficient is k1, and the radius absolute value of described second surface is r2, and quadratic term coefficient is k2, and the thickness of described plus lens is d, and total focal length of the optical system that described plus lens is corresponding is f；Wherein,
49 ＜ r1 ＜ 150,20 ＜ r2 ＜ 40,0.3 ＜ r1/r2 ＜ 0.45；
-3 ＜ k1 ＜-0.5 ,-3 ＜ k2 ＜-0.5；
33 ＜ f ＜ 40；
0.45 ＜ f/r1 ＜ 0.65,1.2 ＜ f/r2 ＜ 1.8,2.6 ＜ f/d ＜ 3.
2. eyepiece camera lens as claimed in claim 1, it is characterised in that the back focal length of the optical system that described plus lens is corresponding is L, 23 ＜ L ＜ 34.
3. eyepiece camera lens as claimed in claim 1, it is characterised in that the ranges of indices of refraction of described plus lens is 1.45 ＜ n ＜ 1.70, and dispersion range is 50 ＜ v ＜ 75.
4. eyepiece camera lens as claimed in claim 3, it is characterised in that described plus lens uses the COP cyclic olefin polymer of K26r model.
5. eyepiece camera lens as claimed in claim 4, it is characterised in that the refractive index of described plus lens is n=1.535, and dispersion is v=56.
6. wear display optical system for one kind, it is characterised in that this is worn display optical system and includes successively against light direction: diaphragm, the eyepiece camera lens as according to any one of claim 1 to 5, and display screen.
Wear display optical system the most as claimed in claim 6, it is characterised in that described diaphragm is positioned at human eye pupil.
8. a helmet, it is characterised in that include wearing display optical system described in claim 6 or 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521141024.5U CN205450452U (en) | 2015-12-31 | 2015-12-31 | Eyepiece camera lens, wear and show optical system and head -mounted apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521141024.5U CN205450452U (en) | 2015-12-31 | 2015-12-31 | Eyepiece camera lens, wear and show optical system and head -mounted apparatus |
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| CN205450452U true CN205450452U (en) | 2016-08-10 |
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| CN201521141024.5U Withdrawn - After Issue CN205450452U (en) | 2015-12-31 | 2015-12-31 | Eyepiece camera lens, wear and show optical system and head -mounted apparatus |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105511078A (en) * | 2015-12-31 | 2016-04-20 | 北京小鸟看看科技有限公司 | Ocular lens, head-mounted display optical system and head-mounted equipment |
| CN109407301A (en) * | 2018-11-30 | 2019-03-01 | 重庆爱奇艺智能科技有限公司 | A kind of eyepiece and headset equipment |
| JP7393755B2 (en) | 2020-01-23 | 2023-12-07 | 国立大学法人東京農工大学 | Head-mounted display and virtual image forming lens used therein |
-
2015
- 2015-12-31 CN CN201521141024.5U patent/CN205450452U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105511078A (en) * | 2015-12-31 | 2016-04-20 | 北京小鸟看看科技有限公司 | Ocular lens, head-mounted display optical system and head-mounted equipment |
| US9835846B2 (en) | 2015-12-31 | 2017-12-05 | Beijing Pico Technology Co., Ltd. | Ocular lens, headset display optical system, and headset device |
| CN109407301A (en) * | 2018-11-30 | 2019-03-01 | 重庆爱奇艺智能科技有限公司 | A kind of eyepiece and headset equipment |
| CN109407301B (en) * | 2018-11-30 | 2021-06-15 | 重庆爱奇艺智能科技有限公司 | Eyepiece and head-mounted equipment |
| JP7393755B2 (en) | 2020-01-23 | 2023-12-07 | 国立大学法人東京農工大学 | Head-mounted display and virtual image forming lens used therein |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160810 Effective date of abandoning: 20180216 |