CN106338821A - Micro display eyepiece and head-mounted equipment - Google Patents

Micro display eyepiece and head-mounted equipment Download PDF

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Publication number
CN106338821A
CN106338821A CN201610834705.2A CN201610834705A CN106338821A CN 106338821 A CN106338821 A CN 106338821A CN 201610834705 A CN201610834705 A CN 201610834705A CN 106338821 A CN106338821 A CN 106338821A
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CN
China
Prior art keywords
micro display
plus lens
display eyepiece
diffraction surfaces
lens
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Granted
Application number
CN201610834705.2A
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Chinese (zh)
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CN106338821B (en
Inventor
王元鹏
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Goertek Optical Technology Co Ltd
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Goertek Techology Co Ltd
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Priority to CN201610834705.2A priority Critical patent/CN106338821B/en
Publication of CN106338821A publication Critical patent/CN106338821A/en
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B25/00—Eyepieces; Magnifying glasses
    • G02B25/001—Eyepieces
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B25/00—Eyepieces; Magnifying glasses
    • G02B25/04—Eyepieces; Magnifying glasses affording a wide-angle view, e.g. through a spy-hole
    • 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
    • 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
    • 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
    • G02B2027/0123—Head-up displays characterised by optical features comprising devices increasing the field of view

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)

Abstract

The invention discloses a micro display eyepiece and head-mounted equipment. The micro display eyepiece comprises two positive lenses. A first positive lens and a second positive lens are orderly arranged against a light incident direction. A second surface and a third surface have diffraction surfaces with positive focal power. The focal powers are mutually compensated through diffraction surfaces and refraction surfaces, thus the light emitting screen of a micro display eyepiece realizes an 80-degree visual angle in the condition of 1 inch. Since the diffraction surfaces have positive color dispersion in a positive focal power state, the color difference of a compensation system can be compensated, the diffraction surfaces do not generate field curvature, and thus the imaging quality of an edge visual field can be improved further. At the same time, a plastic material which is easy to process is used to reduce the size of the lens. The micro display eyepiece and head-mounted equipment provided by the technical scheme can satisfy the market requirements of a light weight, a small size, low cost and a large visual field.

Description

A kind of micro display eyepiece and helmet
Present patent application is to be on November 28th, 2014, Application No. 201410713899.1, entitled the applying date A kind of divisional application of the Chinese invention patent application of " micro display eyepiece and helmet ".
Technical field
The present invention relates to optical technical field, particularly to a kind of micro display eyepiece and helmet.
Background technology
Micro display (i.e. small screen) helmet is because its screen size is little, low cost, light-weighted advantage commercially Very popular.
In micro display system, image height and the angle of visual field meet relational expression h=fgtan (θ), and wherein h is screen half height, and f is light Learn system focal, θ is angle of half field-of view.If micro display system provides the larger angle of visual field, that is, the h in formula gets the small value and θ Under the requirement that need to take large values, the value of focal length f will very little.In the case that the bore of optical system is certain, the focal length f of system Less, its diopter is stronger.This is accomplished by multigroup eyeglass shares focal power and avoids causing huge aberrations by diopter is excessive.But It is the requirement running counter to lightweight, miniaturization using the optical system of multigroup eyeglass；And in traditional optical system, correct color Difference needs positive and negative lens combination, and introduces the focal power burden that minus lenses then can increase plus lens, affects image quality, so passing The design of system is difficult to provide the larger angle of visual field it is impossible to bring enough feeling of immersion to user it is difficult to meet big visual field micro- aobvious Show the requirement of helmet system.
Content of the invention
The invention provides a kind of micro display eyepiece and helmet, cannot be in lightweight, small-sized to solve existing eyepiece The problem of big visual field is realized under the requirement changed.
For reaching above-mentioned purpose, the technical scheme is that and be achieved in that:
On the one hand, the invention provides a kind of micro display eyepiece, including the first plus lens and the second plus lens, described first Plus lens and the second plus lens set gradually against the incident direction of light, and described first plus lens and described second plus lens are equal For plastic material；
Described first plus lens have the first surface towards image space and the second surface towards object space；
Described second plus lens have the 3rd surface towards image space and the 4th surface towards object space；
Wherein said second surface and described 3rd surface are the diffraction surfaces with positive light coke, described first surface and institute Stating the 4th surface is aspheric surface.
On the other hand, the invention provides a kind of helmet, described helmet is using technique scheme offer Micro display eyepiece.
The micro display eyepiece that the technical program provides and helmet adopt double plus lens structures, and in two plus lens At least one surface on setting there are the diffraction surfaces of positive light coke, focal power is mutually compensated for by diffraction surfaces and plane of refraction, makes The luminescent screen of micro display eyepiece realizes 80 ° of the angle of visual field in the case of 1 inch；Because diffraction surfaces are under positive light coke state There is positive dispersion, be capable of the aberration of effective compensation system, and hardly produce any curvature of field, therefore micro display eyepiece The image quality of peripheral field significantly improve；By arranging two diffraction surfaces come the focal power needed for sharing system, and point It is not arranged on second surface and the 3rd surface, make two diffraction surfaces be located at the centre position of optical system, conveniently in production process The face type of middle protection diffraction surfaces；Lens in the present embodiment can be reduced further using plastic material easy to process simultaneously The volume of system, so that micro display eyepiece and helmet disclosure satisfy that lightweight, miniaturization, big visual field, the market of low cost Demand.
Brief description
Fig. 1 is the structural representation of micro display eyepiece provided in an embodiment of the present invention；
Fig. 2 is the curvature of field and the distortion aberration curve synoptic diagram of micro display eyepiece provided in an embodiment of the present invention；
Fig. 3 is the point range figure of micro display eyepiece provided in an embodiment of the present invention；
Fig. 4 is a kind of point range figure of the micro display eyepiece not correcting ratio chromatism,；
Fig. 5 is the optical transfer function curve synoptic diagram of micro display eyepiece provided in an embodiment of the present invention；
Fig. 6 is the ratio chromatism, schematic diagram of micro display eyepiece provided in an embodiment of the present invention；
Fig. 7 is a kind of ratio chromatism, schematic diagram of the micro display eyepiece of non-color correction difference.
Specific embodiment
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to embodiment party of the present invention Formula is described in further detail.
Fig. 1 is the structural representation of micro display eyepiece provided in an embodiment of the present invention, and the system is spread out hybrid optical for folding System.
This micro display eyepiece includes the first plus lens 1 and the second plus lens 2, the first plus lens 1 and the second plus lens 2 against The incident direction of light sets gradually, and wherein the diaphragm 3 of micro display eyepiece is human eye pupil, first with the first plus lens 1 The distance on surface 11 is 10mm, wherein:
First plus lens 1 have the first surface 11 towards image space and the second surface 12 towards object space；
Second plus lens 2 have the 3rd surface 21 towards image space and the 4th surface 22 towards object space；
And described first surface 11, second surface 12, the 3rd surface 21, at least one surface is arranged in the 4th surface 22 There are the diffraction surfaces of positive light coke.
In a preferred embodiment, the first surface 11 of the first plus lens 1 is convex to image space, the middle position of second surface 12 It is convex to object space, and second surface 12 is diffraction surfaces；
3rd surface 21 of the second plus lens 2 is convex to image space, and the middle position on the 4th surface 22 is convex to object space, and the 3rd table Face 21 is diffraction surfaces.
This preferred embodiment is by arranging two diffraction surfaces come the focal power needed for sharing system, and is separately positioned on the Two surfaces and the 3rd surface, make two diffraction surfaces be located at the centre position of optical system, convenient protection diffraction in process of production The face type in face.
It is further preferred that the face type of second surface 12 and the diffraction surfaces on the 3rd surface 21 is designed to identical.Two faces Type identical diffraction surfaces can reduce mould processing charges, cost-effective.
It is further preferred that first surface 11 and the 4th surface 22 are designed as aspheric surface, answered with the processing reducing system Miscellaneous degree.
It is further preferred that the upper and lower end face of the first plus lens 1 and the second plus lens 2 is designed as plane, convenient regulation The alignment error of lens.
In another embodiment, the first plus lens 1 are plastic material, and its ranges of indices of refraction is 1.45 ＜ n1＜ 1.70, color Scattered scope is 50 ＜ v1＜ 75；Second plus lens 2 are plastic material, and its ranges of indices of refraction is 1.45 ＜ n1＜ 1.70, dispersion range For 50 ＜ v1＜ 75, the lens shape of plastic material is easy to process, makes system lighter.
Fig. 2 is the curvature of field and the distortion aberration curve synoptic diagram of micro display eyepiece provided in an embodiment of the present invention, the present embodiment In two plus lens be respectively pmma model plastic material, its refractive index be n1=1.531160, dispersion is v1=56.04； Left figure is the curvature of field curve synoptic diagram of micro display eyepiece, and the t line of in figure is meridianal curvature of field, and s line is Sagittal field curvature, meridianal curvature of field and The difference of Sagittal field curvature is the astigmatism of system, and the curvature of field and astigmatic influence the aberration of the outer field rays of system axle, and it is tight that difference crosses conference The image quality having influence on system off-axis ray of weight.From left figure as can be seen that the curvature of field of the system and astigmatism are all corrected to In very low range；Right figure is micro display eyepiece distortion aberration curve synoptic diagram, and distortion does not interfere with the definition of system, only can draw Play system anamorphose, but distortion can be processed by later image and solve, from right figure as can be seen that the distortion of the system is in reasonable model In enclosing, therefore, diffraction surfaces provided in an embodiment of the present invention can not only provide the positive dispersion under positive light coke state, and not The curvature of field and the distortion of micro display eyepiece can be affected, significantly increase the image quality of peripheral field.
Micro display eyepiece in the present embodiment corrects ratio chromatism, such that it is able to obtain good picture matter, as Fig. 3 institute Show, be the point range figure of micro display eyepiece provided in an embodiment of the present invention, point range figure is shown that each field rays of system exist The disc of confusion converging at image planes and being formed, the system of characterizing obtains the characteristic of various differences, and the rms radius in point range figure is (all Root radius) less proof system image quality better.In Fig. 3, three kinds of greyscale color represent the light of three kinds of wave bands respectively, The aberration of the system of more making out a certificate that the disc of confusion of three kinds of greyscale color divides is bigger；Fig. 4 is the micro display mesh not correcting ratio chromatism, The point range figure of mirror, substantially, contrast Fig. 3 and Fig. 4 understands in figure dispersion phenomenon, the color of micro display eyepiece provided in an embodiment of the present invention Difference has obtained good correction.
Fig. 5 is the ratio chromatism, schematic diagram of micro display eyepiece provided in an embodiment of the present invention, and the transverse axis of in figure represents aberration, The longitudinal axis is the angle of visual field, and curve more deviation vertical axis tilt represents ratio chromatism, and increases with visual field and send change；Fig. 6 is for one kind not The ratio chromatism, schematic diagram of the micro display eyepiece of color correction difference, contrast Fig. 5 and Fig. 6 it can be seen that in Fig. 5 (present invention provide be System) value of chromatism that characterizes is much smaller than the value of chromatism of Fig. 6 (system of non-correcting chromatic aberration), and comprehensive and Fig. 2-Fig. 6 can be seen that the present invention The aberration of the micro display eyepiece that embodiment provides has obtained good correction.
Fig. 7 is the optical transfer function curve synoptic diagram of micro display eyepiece provided in an embodiment of the present invention, in figure transverse axis generation The telogenesis image plane center of circle to the radius size position at edge, the left side is zero to be optical center, and rightmost is at image field radius edge, Dimensional units are millimeters, and the longitudinal axis represents imaging quality and reaches the percentage ratio of situation in kind, and from 0 to 1, optical transfer function mtf can With the image quality of concentrated expression system, its curve shape is more smooth and relative transverse axis height higher (i.e. closer to 1), system Image quality better；The mtf that the micro display eyepiece of the present embodiment obtains in 0 °～40 ° angles of visual field is given (with this enforcement in Fig. 7 The micro display eyepiece of example is mutually symmetrical with the mtf curve of 0 °～-40 ° of angles of visual field) ideal it can be seen that the aberration of the system Obtain good correction.
The micro display eyepiece that technique scheme provides includes two plus lens, is disposed with against light incident direction First plus lens and the second plus lens；Using double plus lens structures, at least arrange on a surface of two plus lens and have The diffraction surfaces of positive light coke, mutually compensate for focal power by diffraction surfaces and plane of refraction, and the luminescent screen making micro display eyepiece is in 1 English 80 ° of the angle of visual field is realized in the case of very little；Because diffraction surfaces have positive dispersion under positive light coke state, can effectively mend Repay the aberration of system, and hardly produce any curvature of field, the image quality of the therefore peripheral field of system significantly improves；With When the present embodiment in lens adopt plastic material easy to process, reduce the volume of system further, so that micro display eyepiece Meet lightweight, miniaturization, the market demand of big visual field.
Another embodiment of the present invention provides a kind of helmet, the micro display mesh being provided using technique scheme Mirror.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit protection scope of the present invention.All Any modification, equivalent substitution and improvement made within the spirit and principles in the present invention etc., are all contained in protection scope of the present invention Interior.

Claims (8)

1. a kind of micro display eyepiece is it is characterised in that include the first plus lens and the second plus lens, described first plus lens and the Two plus lens set gradually against the incident direction of light, and described first plus lens and described second plus lens are plastics material Matter；
Described first plus lens have the first surface towards image space and the second surface towards object space；
Described second plus lens have the 3rd surface towards image space and the 4th surface towards object space；
Wherein, described second surface and described 3rd surface are the diffraction surfaces with positive light coke, described first surface and described 4th surface is aspheric surface.
2. micro display eyepiece according to claim 1 it is characterised in that
The first surface of described first plus lens is convex to image space, and the middle position of second surface is convex to object space；
3rd surface of described second plus lens is convex to image space, and the middle position on the 4th surface is convex to object space.
3. micro display eyepiece according to claim 1 is it is characterised in that the diffraction surfaces of described second surface and the described 3rd The face type of the diffraction surfaces on surface is identical.
4. micro display eyepiece according to claim 2 is it is characterised in that described first plus lens and described second plus lens Upper and lower end face be plane.
5. micro display eyepiece according to claim 1 it is characterised in that
The ranges of indices of refraction of described first plus lens is 1.45 ＜ n1＜ 1.70, dispersion range is 50 ＜ v1＜ 75；
Described second plus lens are 1.45 ＜ n for ranges of indices of refraction2＜ 1.75, dispersion range is 25 ＜ v2＜ 40.
6. the micro display eyepiece according to any one of claim 1-5 is it is characterised in that the luminescent screen of described micro display eyepiece Curtain be smaller in size than 1 inch.
7. micro display eyepiece according to claim 6 is it is characterised in that the diaphragm behaviour eye pupil of described micro display eyepiece Hole, the distance with described first surface is 10mm.
8. a kind of helmet is it is characterised in that described helmet includes the micro display as described in any one of claim 1-7 Eyepiece.
CN201610834705.2A 2014-11-28 2014-11-28 A kind of micro display eyepiece and helmet Active CN106338821B (en)

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CN201410713899.1A CN104503076B (en) 2014-11-28 2014-11-28 Micro display eyepiece and head-mounted equipment
CN201610834705.2A CN106338821B (en) 2014-11-28 2014-11-28 A kind of micro display eyepiece and helmet

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CN104898267A (en) * 2015-03-27 2015-09-09 上海理鑫光学科技有限公司 Eyepiece with expanded field angle
CN107783294A (en) * 2016-08-31 2018-03-09 深圳超多维科技有限公司 A kind of VR display devices and VR display devices
CN106199972A (en) * 2016-09-06 2016-12-07 东莞市美光达光学科技有限公司 A kind of for observing the wear-type optical system that large scale screen 3D shows
CN106501928A (en) * 2016-11-15 2017-03-15 上海乐蜗信息科技有限公司 A kind of optical system
CN106773010B (en) * 2016-11-28 2023-09-15 歌尔光学科技有限公司 2P structure lens, head-mounted display optical system and head-mounted equipment
CN106842518B (en) * 2017-03-03 2022-06-17 东莞市宇光光电科技有限公司 Endoscopic image pickup objective optical system
CN112180603B (en) * 2020-09-30 2023-05-19 维沃移动通信有限公司 Projection device and intelligent glasses

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CN104503076B (en) 2017-02-08
CN106338821B (en) 2018-10-26

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