CN204314543U - A kind of micro-display eyepiece and helmet - Google Patents
A kind of micro-display eyepiece and helmet Download PDFInfo
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- CN204314543U CN204314543U CN201420740631.2U CN201420740631U CN204314543U CN 204314543 U CN204314543 U CN 204314543U CN 201420740631 U CN201420740631 U CN 201420740631U CN 204314543 U CN204314543 U CN 204314543U
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- positive lens
- display eyepiece
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- diffraction surfaces
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Abstract
The utility model discloses a kind of micro-display eyepiece and helmet.Described micro-display eyepiece comprises two positive lenss, the first positive lens and the second positive lens is set gradually along light direction, at least one surface arranges the diffraction surfaces with positive light coke, by diffraction surfaces and the mutual compensating light focal power of plane of refraction, make the luminescent screen of micro-display eyepiece when 1 inch, realize the field angle of 80 °; Because diffraction surfaces has positive dispersion under positive light coke state, therefore can the aberration of effective compensation system, and diffraction surfaces can not produce the curvature of field, thus the image quality of peripheral field can be improved further; Adopt the lens being easy to the plastic material processed to reduce volume simultaneously.Micro-display eyepiece that the technical program provides and helmet can meet the market demand of lightweight, miniaturization, low cost and Large visual angle.
Description
Technical field
The utility model relates to optical technical field, particularly the micro-display eyepiece of one and helmet.
Background technology
Micro-display (i.e. small screen) helmet is because its screen size is little, cost is low, light-weighted advantage is commercially very popular.
In micro display system, image height and field angle meet relational expression h=ftan (θ), and wherein h is screen half height, and f is optical system focal length, and θ is angle of half field-of view.If micro display system provides larger field angle, the h namely in formula gets the small value and under the requirement that θ need take large values, the value of focal distance f will be very little.When the bore of optical system is certain, the focal distance f of system is less, and its diopter is stronger.This just needs many arrangements of mirrors sheet to share focal power to be avoided causing huge aberrations by diopter is excessive.But adopt the optical system of many arrangements of mirrors sheet to run counter to the requirement of lightweight, miniaturization; And in traditional optical system, correcting chromatic aberration needs positive and negative lens combination, introduce the focal power burden that negative lens then can strengthen positive lens, affect image quality, so traditional design is difficult to provide larger field angle, enough feeling of immersion cannot be brought to user, be difficult to the requirement meeting the micro-display helmet system of Large visual angle.
Utility model content
The utility model provides a kind of micro-display eyepiece and helmet, to solve the problem that existing eyepiece cannot realize Large visual angle under the requirement of lightweight, miniaturization.
For achieving the above object, the technical solution of the utility model is achieved in that
On the one hand, the utility model provides a kind of micro-display eyepiece, comprises the first positive lens and the second positive lens, and described first positive lens and the second positive lens set gradually along the direction of light,
Described first positive lens has the first surface towards image space and the second surface towards object space;
Described second positive lens has the 3rd surface towards image space and the 4th surface towards object space;
One side is had at least for having the diffraction surfaces of positive light coke in wherein said first surface, second surface, the 3rd surface, the 4th surface.
Preferably,
The first surface of described first positive lens is convex in image space, and the middle position of second surface is convex in object space, and second surface is diffraction surfaces;
3rd surface of described second positive lens is convex in image space, and the middle position on the 4th surface is convex in object space, and the 3rd surface is diffraction surfaces.
Preferably, the diffraction surfaces of described second surface is identical with the face type of the diffraction surfaces on described 3rd surface.
Preferably, described first surface and described 4th surface are aspheric surface.
Preferably, the upper and lower end face of described first positive lens and described second positive lens is plane.
Preferably described first positive lens and/or described second positive lens are plastic material.
Preferably, the ranges of indices of refraction of described first positive lens is 1.45 < n
1< 1.70, dispersion range is 50 < v
1< 75; Described second positive lens is ranges of indices of refraction is 1.45 < n
2< 1.75, dispersion range is 25 < v
2< 40.
Preferably, the size of the luminescent screen of described micro-display eyepiece is less than 1 inch.
Preferably, the diaphragm behaviour eye pupil hole of described micro-display eyepiece is 10mm with the distance of described first surface.
On the other hand, the utility model provides a kind of helmet, micro-display eyepiece that described helmet adopts technique scheme to provide.
Micro-display eyepiece that the technical program provides and helmet adopt two positive lens structure, and at least one of two positive lenss, the diffraction surfaces with positive light coke is set on the surface, by diffraction surfaces and the mutual compensating light focal power of plane of refraction, make the luminescent screen of micro-display eyepiece when 1 inch, realize the field angle of 80 °; Because diffraction surfaces has positive dispersion under positive light coke state, can the aberration of effective bucking-out system, and produce any curvature of field hardly, therefore the image quality of the peripheral field of micro-display eyepiece significantly improves; Lens simultaneously in the present embodiment can adopt the plastic material being easy to process, and the volume of further reduction system, with the market demand enabling micro-display eyepiece and helmet meet lightweight, miniaturization, Large visual angle, low cost.
Accompanying drawing explanation
The structural representation of micro-display eyepiece that Fig. 1 provides for the utility model embodiment;
The curvature of field of micro-display eyepiece that Fig. 2 provides for the utility model embodiment and distortion aberration curve synoptic diagram;
The point range figure of micro-display eyepiece that Fig. 3 provides for the utility model embodiment;
Fig. 4 is a kind of point range figure not correcting micro-display eyepiece of ratio chromatism;
The optical transfer function curve synoptic diagram of micro-display eyepiece that Fig. 5 provides for the utility model embodiment;
The ratio chromatism, schematic diagram of micro-display eyepiece that Fig. 6 provides for the utility model embodiment;
Fig. 7 is a kind of ratio chromatism, schematic diagram of micro-display eyepiece of non-color correction difference.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearly, below in conjunction with accompanying drawing, the utility model embodiment is described in further detail.
The structural representation of micro-display eyepiece that Fig. 1 provides for the utility model embodiment, native system is that folding spreads out hybrid optical system.
This micro-display eyepiece comprises the first positive lens 1 and the second positive lens 2, first positive lens 1 and the second positive lens 2 set gradually along the direction of light, wherein the diaphragm 3 of micro-display eyepiece is human eye pupil, is 10mm with the distance of the first surface 11 of the first positive lens 1, wherein:
First positive lens 1 has the first surface 11 towards image space and the second surface 12 towards object space;
Second positive lens 2 has towards the 3rd surface 21 of image space and the 4th surface 22 towards object space;
And described first surface 11, second surface 12, the 3rd surface 21, have at least a surface to be arranged to have the diffraction surfaces of positive light coke in the 4th surface 22.
In a preferred embodiment, the first surface 11 of the first positive lens 1 is convex in image space, and the middle position of second surface 12 is convex in object space, and second surface 12 is diffraction surfaces;
3rd surface 21 of the second positive lens 2 is convex in image space, and the middle position on the 4th surface 22 is convex in object space, and the 3rd surface 21 is diffraction surfaces.
The focal power that this preferred embodiment comes needed for sharing system by arranging two diffraction surfaces, and be separately positioned on second surface and the 3rd surface, make two diffraction surfaces be positioned at the centre position of optical system, the convenient face type protecting diffraction surfaces in process of production.
Further preferably, the face type of the diffraction surfaces on second surface 12 and the 3rd surface 21 is designed to identical.The diffraction surfaces that two face types are identical can reduce Mould Machining expense, save cost.
Further preferably, first surface 11 and the 4th surface 22 are designed to aspheric surface, to reduce the processed complex degree of system.
Further preferably, the upper and lower end face of the first positive lens 1 and the second positive lens 2 is designed to plane, the convenient alignment error regulating lens.
In another embodiment, the first positive lens 1 is plastic material, and its ranges of indices of refraction is 1.45 < n
1< 1.70, dispersion range is 50 < v
1< 75; Second positive lens 2 is plastic material, and its ranges of indices of refraction is 1.45 < n
1< 1.70, dispersion range is 50 < v
1< 75, the lens shape of plastic material is easy to processing, makes system lighter.
The curvature of field of micro-display eyepiece that Fig. 2 provides for the utility model embodiment and distortion aberration curve synoptic diagram, two positive lenss in the present embodiment are respectively the plastic material of PMMA model, and its refractive index is n
1=1.531160, dispersion is v
1=56.04; Left figure is the curvature of field curve synoptic diagram of micro-display eyepiece, t line in figure is meridianal curvature of field, s line is Sagittal field curvature, the difference of meridianal curvature of field and Sagittal field curvature is the astigmatism of system, the curvature of field and astigmatic influence the aberration of the outer field rays of system axle, and difference crosses the image quality of the serious system that the has influence on off-axis ray of conference.As can be seen from left figure, the curvature of field of native system and astigmatism are all corrected in very low range; Right figure is micro-display eyepiece distortion aberration curve synoptic diagram, distortion can not the sharpness of influential system, only can cause system diagram distortion of image, but distortion can be dealt with by later image, and as can be seen from right figure, the distortion of native system in the reasonable scope, therefore, the diffraction surfaces that the utility model embodiment provides can not only provide the positive dispersion under positive light coke state, and can not affect the curvature of field and the distortion of micro-display eyepiece, improves the image quality of peripheral field significantly.
Micro-display eyepiece in the present embodiment corrects ratio chromatism, thus good picture element can be obtained, as shown in Figure 3, for the point range figure of micro-display eyepiece that the utility model embodiment provides, point range figure display be system each field rays image planes place converge and formed disc of confusion, the system of characterizing obtains the characteristic of various difference, and the image quality of RMS RADIUS (root mean square radii) the less proof system in point range figure is better.In Fig. 3, three kinds of greyscale color represent the light of three kinds of wave bands respectively, and the aberration of the system of more making out a certificate that the disc of confusion of three kinds of greyscale color divides is larger; Fig. 4 is the point range figure of the micro-display eyepiece not correcting ratio chromatism, and in figure, dispersion phenomenon is obvious, comparison diagram 3 and Fig. 4 known, the aberration of micro-display eyepiece that the utility model embodiment provides has obtained good correction.
The ratio chromatism, schematic diagram of micro-display eyepiece that Fig. 5 provides for the utility model embodiment, the transverse axis in figure represents aberration, and the longitudinal axis is field angle, and curve more departs from vertical axis tilt and represents ratio chromatism, transmission change along with visual field increase; Fig. 6 is a kind of ratio chromatism, schematic diagram of micro-display eyepiece of non-color correction difference, comparison diagram 5 and Fig. 6, value of chromatism that in Fig. 5, (system that the utility model provides) the characterizes value of chromatism much smaller than Fig. 6 (system of non-correcting chromatic aberration) can be found out, combine and can find out with Fig. 2-Fig. 6, the aberration of micro-display eyepiece that the utility model embodiment provides has obtained good correction.
The optical transfer function curve synoptic diagram of micro-display eyepiece that Fig. 7 provides for the utility model embodiment, in figure, transverse axis represents the radius size position of the imaging plane center of circle to edge, the left side is zero is optical center, rightmost is image field radius edge place, dimensional units is millimeter, the longitudinal axis represents the number percent that imaging quality reaches situation in kind, from 0 to 1, optical transfer function MTF can the image quality of concentrated expression system, more level and smooth and the relative transverse axis height higher (namely more close to 1) of its curve shape, the image quality of system is better; The MTF (symmetrical mutually at the MTF curve of 0 ° ~-40 ° of field angle with micro-display eyepiece of the present embodiment) that the micro-display eyepiece providing the present embodiment in Fig. 7 obtains 0 ° ~ 40 ° field angle is ideal, can find out that the aberration of native system obtains good correction.
Micro-display eyepiece that technique scheme provides comprises two positive lenss, is disposed with the first positive lens and the second positive lens along light direction of entering an association; Adopt two positive lens structure, the diffraction surfaces with positive light coke is at least set on a surface of two positive lenss, by diffraction surfaces and the mutual compensating light focal power of plane of refraction, makes the luminescent screen of micro-display eyepiece when 1 inch, realize the field angle of 80 °; Because diffraction surfaces has positive dispersion under positive light coke state, can the aberration of effective bucking-out system, and produce any curvature of field hardly, therefore the image quality of the peripheral field of system significantly improves; Lens simultaneously in the present embodiment adopt the plastic material being easy to process, and the volume of further reduction system, with the market demand making micro-display eyepiece meet lightweight, miniaturization, Large visual angle.
Of the present utility modelly still another embodiment provides a kind of helmet, adopt micro-display eyepiece that technique scheme provides.
The foregoing is only preferred embodiment of the present utility model, be not intended to limit protection domain of the present utility model.All do within spirit of the present utility model and principle any amendment, equivalent replacement, improvement etc., be all included in protection domain of the present utility model.
Claims (10)
1. a micro-display eyepiece, is characterized in that, comprises the first positive lens and the second positive lens, and described first positive lens and the second positive lens set gradually along the direction of light,
Described first positive lens has the first surface towards image space and the second surface towards object space;
Described second positive lens has the 3rd surface towards image space and the 4th surface towards object space;
One side is had at least for having the diffraction surfaces of positive light coke in wherein said first surface, second surface, the 3rd surface, the 4th surface.
2. micro-display eyepiece according to claim 1, is characterized in that,
The first surface of described first positive lens is convex in image space, and the middle position of second surface is convex in object space, and second surface is diffraction surfaces;
3rd surface of described second positive lens is convex in image space, and the middle position on the 4th surface is convex in object space, and the 3rd surface is diffraction surfaces.
3. micro-display eyepiece according to claim 2, is characterized in that, the diffraction surfaces of described second surface is identical with the face type of the diffraction surfaces on described 3rd surface.
4. micro-display eyepiece according to claim 2, is characterized in that, described first surface and described 4th surface are aspheric surface.
5. micro-display eyepiece according to claim 2, is characterized in that, the upper and lower end face of described first positive lens and described second positive lens is plane.
6. the micro-display eyepiece according to any one of claim 2, is characterized in that, described first positive lens and/or described second positive lens are plastic material.
7. micro-display eyepiece according to claim 6, is characterized in that,
The ranges of indices of refraction of described first positive lens is 1.45 < n
1< 1.70, dispersion range is 50 < v
1< 75;
Described second positive lens is ranges of indices of refraction is 1.45 < n
2< 1.75, dispersion range is 25 < v
2< 40.
8. the micro-display eyepiece according to any one of claim 1-7, is characterized in that, the size of the luminescent screen of described micro-display eyepiece is less than 1 inch.
9. micro-display eyepiece according to claim 8, is characterized in that, the diaphragm behaviour eye pupil hole of described micro-display eyepiece is 10mm with the distance of described first surface.
10. a helmet, is characterized in that, described helmet comprises the micro-display eyepiece as described in any one of claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420740631.2U CN204314543U (en) | 2014-11-28 | 2014-11-28 | A kind of micro-display eyepiece and helmet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420740631.2U CN204314543U (en) | 2014-11-28 | 2014-11-28 | A kind of micro-display eyepiece and helmet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204314543U true CN204314543U (en) | 2015-05-06 |
Family
ID=53136848
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420740631.2U Withdrawn - After Issue CN204314543U (en) | 2014-11-28 | 2014-11-28 | A kind of micro-display eyepiece and helmet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204314543U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104503076A (en) * | 2014-11-28 | 2015-04-08 | 青岛歌尔声学科技有限公司 | Micro display eyepiece and head-mounted equipment |
| CN106791754A (en) * | 2016-12-22 | 2017-05-31 | 歌尔科技有限公司 | A kind of equipment chromatic aberration correction method and system |
| WO2018145367A1 (en) * | 2017-02-08 | 2018-08-16 | 浙江舜宇光学有限公司 | Eyepiece and display device with same |
-
2014
- 2014-11-28 CN CN201420740631.2U patent/CN204314543U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104503076A (en) * | 2014-11-28 | 2015-04-08 | 青岛歌尔声学科技有限公司 | Micro display eyepiece and head-mounted equipment |
| CN106791754A (en) * | 2016-12-22 | 2017-05-31 | 歌尔科技有限公司 | A kind of equipment chromatic aberration correction method and system |
| CN106791754B (en) * | 2016-12-22 | 2018-08-21 | 歌尔科技有限公司 | A kind of equipment chromatic aberration correction method and system |
| WO2018145367A1 (en) * | 2017-02-08 | 2018-08-16 | 浙江舜宇光学有限公司 | Eyepiece and display device with same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150506 Effective date of abandoning: 20170208 |