CN104407437A - Zoom head-worn equipment - Google Patents

Zoom head-worn equipment Download PDF

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Publication number
CN104407437A
CN104407437A CN201410559707.6A CN201410559707A CN104407437A CN 104407437 A CN104407437 A CN 104407437A CN 201410559707 A CN201410559707 A CN 201410559707A CN 104407437 A CN104407437 A CN 104407437A
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CN
China
Prior art keywords
display screen
zoom
zoom lens
helmet
lens
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201410559707.6A
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Chinese (zh)
Inventor
刘美鸿
母林
纪超超
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen magic eye Technology Co., Ltd.
Original Assignee
SHENZHEN ESTAR DISPLAYTECH CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SHENZHEN ESTAR DISPLAYTECH CO Ltd filed Critical SHENZHEN ESTAR DISPLAYTECH CO Ltd
Priority to CN201410559707.6A priority Critical patent/CN104407437A/en
Publication of CN104407437A publication Critical patent/CN104407437A/en
Pending legal-status Critical Current

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Classifications

    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B27/00Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01Head-up displays
    • G02B27/017Head mounted
    • G02B27/0172Head mounted characterised by optical features
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B3/00Simple or compound lenses
    • G02B3/12Fluid-filled or evacuated lenses
    • G02B3/14Fluid-filled or evacuated lenses of variable focal length
    • GPHYSICS
    • G02OPTICS
    • G02FDEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/1313Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells specially adapted for a particular application
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B27/00Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01Head-up displays
    • G02B27/017Head mounted
    • G02B2027/0178Eyeglass type, eyeglass details G02C

Abstract

The invention discloses zoom head-worn equipment, belongs to the field of wearable display equipment, and solves problems of discomfort and damage to eyes of people with visual defects in use in the prior art. The zoom head-worn equipment comprises a lens frame, a display screen and a zoom lens. The display screen and the zoom lens are indirectly or directly fixed on the lens frame. The zoom lens is arranged at one side, which is close to the human eyes, of the display screen. The display screen is used for displaying image information. Focal length of the zoom lens is adjustable, and the appropriate focal length is adopted to refract light rays from the display screen to the pupils of the human eyes so as to be imaged on the retinas of the human eyes. The zoom head-worn equipment is suitable for groups with different eyesight, and damage to the eyes can also be avoided.

Description

Zoom helmet
Technical field
The present invention relates to wearable field of display devices, particularly relate to a kind of zoom helmet.
Background technology
Wearable intelligent equipment, as a kind of future technology, no matter in fashion world or on electric consumers market, is all the focus that people pay close attention to.Along with the development of science and technology, increasing intelligent watch, Intelligent spire lamella and intelligent glasses etc. start to walk close in the life of people.And this wherein, head-mounted display apparatus is undoubtedly the pioneer in wearable intelligent equipment.Early stage head-mounted display apparatus representative instance is helmet display and glasses television, but due to helmet display too heavy, and glasses television shortcomings such as also to there is volume large, opaque.Along with further developing of head-mounted display apparatus, miniaturization, multi-functional and intelligent glasses that is transparent mode arises at the historic moment.
The display device of the helmet nowadays on market generally includes display screen and prism, and display screen is for showing image, and the light of prism then for being penetrated by display screen reflexes in human eye, thus forms image on the retina of human eye.
The design object of existing helmet is mostly twenty-twenty people, and it is multi-functional is also premised on the use category of normal person.For the crowd having visual impairment, as myopia and farsightedness, when these helmets of use, it is image blurring that user watches, and meanwhile, can bring sense of discomfort to user, and can cause the injury of eyes.
Summary of the invention
The technical matters that the present invention mainly solves is to provide a kind of zoom helmet, and it can be applicable to the people of twenty-twenty vision, can be applicable to again the people of visual impairment, and can not bring sense of discomfort, can avoid injuring eyes.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: provide a kind of zoom helmet, this zoom helmet comprises picture frame, display screen and zoom lens.Wherein, described display screen and zoom lens are fixed on picture frame indirectly or directly; Described zoom lens are arranged on the side of the close human eye of display screen; Described display screen is used for displays image information; The focus adjustable of described zoom lens, and adopt suitable focal length by the light refraction from described display screen to the pupil of human eye, and be imaged on human eye retina.
Preferably, described zoom lens are liquid crystal lens, or liquid lens.
Preferably, described zoom lens change focal length by the change of driving voltage.
Preferably, described zoom lens are single element lens, or multi-disc lens.
Preferably, described display screen is directly fixed on picture frame; Or, described picture frame is fixed with eyeglass; Described display screen is a miniature display screen curtain, and it is embedded in described eyeglass.
Preferably, described zoom helmet is intelligent glasses; Described intelligent glasses is monocular intelligent glasses or binocular intelligent glasses.
Preferably, comprise zoom drive circuit, for when opening described display screen and making it show image, the focal length adjusting described zoom lens makes the clear picture be imaged on human eye retina.
Preferably, the picture size k of described display screen display meets the following conditions:
k ≤ ( g d + f - g f ) p + ge d ,
Wherein, g is the spacing of described display screen and described zoom lens, and d is described zoom lens and the oculopupillary spacing of people, and f is the focal length of described zoom lens, and p is the size of described zoom lens, and e behaves oculopupillary size.
Preferably, when normal visual acuity or the myopia of user, user adjusts the focal length of described zoom lens, within the image that display screen is shown is positioned at described zoom lens one times of focal length; Following relation is met between each parameter:
fg f - g + d > 2 f ′ , F ' is people's eyeball focal length.
Preferably, when normal visual acuity or the long sight of user, user adjusts the focal length of described zoom lens, and the image that described display screen is shown is described zoom lens one times between focal length and two focus length; Following relation is met between each parameter:
gf g - f - d > t , T is people's eye pupil hole and amphiblestroid spacing.
The invention has the beneficial effects as follows: the situation being different from prior art, zoom helmet of the present invention arranges the zoom lens of focus adjustable at the rear side of display screen, by adjusting the focal length of these zoom lens, the image that display screen is shown carried out optical processing before entering the human eye needing to correct defects of vision, thus the human eye making needs correct defects of vision can see image clearly, do not need other wearing spectacles, and improve the comfort level of user, the injury to eyes can also be avoided.
Accompanying drawing explanation
Fig. 1 is the structural representation of the first embodiment of zoom helmet of the present invention;
Fig. 2 is the display screen of the first embodiment of zoom helmet of the present invention and the cross section structure schematic diagram of zoom lens;
Fig. 3 is the principle schematic of the imaging pattern one of the first embodiment of zoom helmet of the present invention;
Fig. 4 is the principle schematic of the imaging pattern two of the first embodiment of zoom helmet of the present invention;
Fig. 5 is the structural representation of the second embodiment of zoom helmet of the present invention;
Fig. 6 is the principle schematic of the imaging pattern one of the second embodiment of zoom helmet of the present invention;
Fig. 7 is the principle schematic of the imaging pattern two of the second embodiment of zoom helmet of the present invention;
Fig. 8 is the principle schematic that the second embodiment of zoom helmet of the present invention carries out 3D display.
Wherein, 1, picture frame; 2, display screen; 21, miniature display screen curtain; 22, eyeglass; 23, image; 24, left anaglyph; 25, right anaglyph; 26,3D rendering; 3, zoom lens; 4, minisize pick-up head earphone; 5, ear-hang; 6, human eye; 61, pupil; 62, retina; 7, the virtual image; 8, real image; 9, temple; 10, earphone; 11, range sensor.
Embodiment
Zoom helmet of the present invention can be the helmet, eyeshade or the common equipment such as intelligent glasses, non intelligent glasses, when it is intelligent glasses time, can be monocular intelligent glasses or binocular intelligent glasses.
Intelligent glasses refers to: as smart mobile phone, there is independently operating system, the program that can be provided by software houses such as user installation software, game, by voice or action manipulated adding schedule, digital map navigation, interactive with good friend, take pictures and video, launch the functions such as video calling with friend, and the general name of such class glasses of wireless network access can be realized by mobile communication network.
Below for intelligent glasses, and the present invention is described in detail by reference to the accompanying drawings.
Refer to Fig. 1, Fig. 2 and Fig. 3, Fig. 1 is the structural representation of the first embodiment of zoom helmet of the present invention; Fig. 2 is the display screen of the first embodiment of zoom helmet of the present invention and the cross section structure schematic diagram of zoom lens; Fig. 3 is the principle schematic of the imaging pattern one of the first embodiment of zoom helmet of the present invention.
In the present embodiment, zoom helmet is monocular intelligent glasses, and this monocular intelligent glasses comprises picture frame 1, display screen 2 and zoom lens 3.
Display screen 2 is for showing image.The focus adjustable of zoom lens 3, the refraction of the emergent ray of display screen 2, through zoom lens 3, by adjusting the focal length of zoom lens 3, is entered pupil 61 by the emergent ray of display screen 2, and imaging on retina 62, thus produce picture.
Display screen 2 and zoom lens 3 are fixed on picture frame 1, and its fixed form can be directly fix or indirectly fix.Such as, display screen 2 edge is directly fixed on picture frame 1.Or, fixing len 22 on picture frame 1, and using miniature display screen curtain 21 as display screen 2, then this miniature display screen curtain 21 is embedded in this eyeglass 22.What adopt in the present embodiment is the second fixed form.
This display screen 2 can be non-transparent display screen, translucent display screen or autoluminescence transparent display screen.Autoluminescence transparent display screen can be active matrix organic light-emitting diode (AMOLED) panel (AMOLED) transparent display screen, or transparent electro luminescent (TASEL) display screen, or the transparent display screen that other this area is conventional.
The focus adjustable of zoom lens 3, and adopt suitable focal length by the light refraction from display screen 2 to the pupil 61 of human eye, and be imaged on human eye retina 62.Zoom lens 3 can be liquid crystal lens or liquid lens, and it can be single element lens or multi-disc lens.The Focussing of zoom lens is undertaken by the change of driving voltage.Liquid as lens, is changed focal length by the curvature changing liquid by liquid lens, is changed the shape of drop, and then change its focal length by impressed voltage.The zoom lens 3 of the present embodiment are monolithic liquid lens, and it is fitted in the rear side of display screen 2, namely near the side of human eye 6.
In addition, zoom lens 3 also can be the lens combination of the glass mirror composition comprising polylith different focal, selected eyeglass or the lens set of the focal length mated with the eyesight of user by adjustment, thus user can be made to see image clearly, improve the comfort level of user.
This monocular intelligent glasses also comprises zoom drive circuit, and it is for when opening display screen 2 and making it show image, and the focal length of adjustment zoom lens 3 makes to be imaged on the clear picture on human eye retina 62.Zoom drive circuit can be connected with a regulating device, and user by regulating driving voltage to the operation of regulating device, thus can change the focal length of zoom lens, and this regulating device can be the device that this area such as regulating wheel or regulating key is commonly used.
The picture frame 1 of this intelligent glasses is provided with earphone 10, minisize pick-up head 4, ear-hang 5 and temple 9.In the present embodiment, other the functional module except display screen 2 is all built in temple 9, as microprocessor, mobile communication module, WIFI, bluetooth and supply module etc.Minisize pick-up head 4 may be used for taking external scene, then is shown by display screen 2.
Due to the focus adjustable of zoom lens, zoom helmet of the present invention can switch two kinds of imaging patterns by adjusting focal length, is imaging pattern one and imaging pattern two respectively.
Refer to Fig. 3 and Fig. 4, Fig. 3 is the principle schematic of the imaging pattern one of the first embodiment of zoom helmet of the present invention; Fig. 4 is the principle schematic of the imaging pattern two of the first embodiment of zoom helmet of the present invention.
When display screen display image, the picture size k of display screen display meets the following conditions:
k ≤ ( g d + f - g f ) p + ge d ,
Wherein, g is the spacing of display screen 2 and zoom lens 3, and d is the spacing of zoom lens 3 and human eye pupil 61, and f is the focal length of zoom lens 3, and p is the size of zoom lens 3, and e is the size in people's eye pupil hole 61.
When user's normal visual acuity or myopia, the focal distance f of adjustment zoom lens 3, within making display screen 2 be positioned at zoom lens 3 one times of focal lengths, i.e. f > g; Following relation is met between each parameter:
fg f - g + d > 2 f ′ , F ' is people's eyeball focal length.
Now, the display image of display screen 2 becomes to amplify the upright virtual image 7 at the object space of zoom lens 3, then human eye will see through zoom lens 3 virtual image 7 that the display Nonlinear magnify of display screen 2 is upright.
When user's normal visual acuity or long sight, the focal distance f of adjustment zoom lens 3, make display screen 2 zoom lens 4 one times between focal length and two focus length, i.e. 1/2g<f<g, meets following relation between each parameter:
gf g - f - d > t , T is people's eye pupil hole and amphiblestroid spacing.
Now, the display image of display screen 2 becomes to amplify the real image 8 stood upside down in the image space of zoom lens 4, and be imaged on after this real image 8 enters human eye pupil on retina 62, its effect is equal to upright enlarged image in human eye 6 direct viewing to object space.
Particularly, regulate the focal length of zoom lens 3, within making display screen 2 be positioned at zoom lens 3 one times of focal lengths, display screen 2 becomes to amplify the upright virtual image 7 at the object space of zoom lens 3, and human eye 6 watches display screen 2 to amplify the upright virtual image 7 through zoom lens 3.
Such as, the pitch k=10mm of display screen 2, the size p=20mm of zoom lens 3, the spacing g=5mm of display screen 2 and zoom lens 3, the spacing d=8mm of zoom lens 3 and pupil 61, usual pupil 61 size is e=4mm, people's eyeball focal distance f '=17.05mm, the spacing t=24mm of pupil 61 and retina 62.
Regulate the focal distance f=5.102mm of zoom lens 3, then each parameter meets relation: f>g,
k &le; ( g d + f - g f ) p + ge d , fg f - g + d > 2 f &prime; .
Now, human eye is by zoom lens 3 it is seen that display screen 2 amplifies the upright virtual image 7, and as shown in Figure 3, this imaging pattern is applicable to twenty-twenty vision or myopia colony.
Certainly, also the focal length of zoom lens 3 can be adjusted, make display screen 2 zoom lens 3 one times between focal length and two focus length, display screen 2 becomes to amplify the real image 8 stood upside down in the image space of zoom lens 3, be imaged on after this real image 8 enters 61 pupils on retina 62, its effect is equal to upright enlarged image in human eye 6 direct viewing to object space.
Such as, regulate the focal distance f=4.5mm of zoom lens 3, then each parameter meets relation: 1/2g<f<g,
k &le; ( g d + f - g f ) p + ge d , gf g - f - d > t .
Now, human eye by zoom lens 3 see as amplified upright material object 8 in object space, as shown in Figure 4, this imaging pattern is applicable to twenty-twenty vision or farsightedness colony.
Be different from the situation of prior art, zoom helmet of the present invention arranges the zoom lens of focus adjustable at the rear side of display screen, by adjusting the focal length of these zoom lens, the imaging pattern of this zoom helmet is changed, a kind of imaging pattern is: adjusting focal length, within the image that display screen is shown is positioned at zoom lens one times of focal length, the image of display screen display becomes to amplify the upright virtual image at the object space of zoom lens, human eye will see through zoom lens the virtual image that the display Nonlinear magnify of display screen is upright, thus make the people of myopia and twenty-twenty vision see image clearly.Another kind of imaging pattern is: adjusting focal length, the image that display screen is shown is described zoom lens one times between focal length and two focus length, the display image of display screen becomes to amplify the real image stood upside down in the image space of zoom lens, after this real image enters human eye pupil, imaging on the retina, its effect is equal to upright enlarged image in human eye direct viewing to object space, thus makes the people of farsightedness and twenty-twenty vision see image clearly.This zoom helmet can be applicable to the colony of different eyesight, does not need the other wearing spectacles of user, improves the comfort level of user, can also avoid the injury to eyes.
Refer to Fig. 5, Fig. 5 is the structural representation of the second embodiment of zoom helmet of the present invention.
In the present embodiment, zoom helmet is binocular intelligent glasses, and this binocular intelligent glasses comprises picture frame 1, display screen 2 and zoom lens 3.
Display screen 2 is for showing image 23, and the edge of this display screen 2 is directly fixed on picture frame 1.
The focus adjustable of zoom lens 3, the refraction of the emergent ray of display screen 2, through zoom lens, by adjusting the focal length of zoom lens 3, is entered pupil 61 by the emergent ray of display screen 2, and imaging on retina 62, thus produce picture.
The zoom lens 3 of the present embodiment are the liquid crystal lens of rectangle, and these zoom lens 3 carry out adjusting focal length by adjustment driving voltage.Zoom lens 3 are provided with two panels, the corresponding human eye of every a slice.Zoom lens 3 are fitted in the rear side of display screen 2, namely near the side of human eye 6.
Other the functional module of binocular intelligent glasses except display screen 2 of the present embodiment is all built in picture frame 1 and temple 9, as microprocessor, mobile communication module, WIFI, bluetooth and supply module etc.Also be inlaid with minisize pick-up head 4 and range sensor 11 on the display screen 2, range sensor 11 may be used for measuring the distance between object that people and minisize pick-up head 4 take, and by this distance of voice message.
Refer to Fig. 6 and Fig. 7, Fig. 6 is the principle schematic of the imaging pattern one of the second embodiment of zoom helmet of the present invention; Fig. 7 is the principle schematic of the imaging pattern two of the second embodiment of zoom helmet of the present invention.
The focal length of adjustment zoom lens 3, within the image 23 that display screen 2 is shown is positioned at one times of focal length of zoom lens 3, the image 23 that display screen 2 shows becomes to amplify the upright virtual image 7 at the object space of zoom lens 3, the virtual image 7 that the amplification of the image 23 that human eye 6 watches display screen 2 to show through zoom lens 3 is upright.
Such as, the spacing d=12mm of zoom lens 3 and pupil 61, for the conventional pitch of glasses and human eye 6, image 23 area size that display screen 2 shows is k=7.322mm, zoom lens 3 are of a size of p=15mm, the spacing g=5mm of display screen 2 and zoom lens 3, and usual pupil 61 size is e=4mm, people's eyeball focal distance f '=17.05mm, the spacing t=24mm of pupil 61 and retina 62.
Regulate the focal distance f=5.15mm of zoom lens 3, then each parameter meets relation: f>g,
k &le; ( g d + f - g f ) p + ge d , fg f - g + d > 2 f &prime; .
Now, human eye is by zoom lens 3 it is seen that display screen 2 amplifies the upright virtual image 7, and as shown in Figure 6, this imaging pattern is applicable to twenty-twenty vision or myopia colony.
Certainly, also the focal length of zoom lens 3 can be adjusted, make display screen 2 zoom lens 3 one times between focal length and two focus length, display screen 2 becomes to amplify the real image 8 stood upside down in the image space of zoom lens 3, be imaged on after this real image 8 enters pupil 61 on retina 62, its effect is equal to upright enlarged image in human eye direct viewing to object space.
Such as, regulate the focal distance f=4.8mm of zoom lens 3, then each parameter meets relation: 1/2g<f<g,
k &le; ( g d + f - g f ) p + ge d , gf g - f - d > t .
Now, human eye by zoom lens 3 see as amplified upright material object 8 in object space, as shown in Figure 7, this imaging pattern is applicable to twenty-twenty vision or farsightedness colony.
Refer to Fig. 8, Fig. 8 is the principle schematic that the second embodiment of zoom helmet of the present invention carries out 3D display.The left image display area of display screen shows left anaglyph 24, and right image display area shows right parallax Figure 25, merges produce 3D rendering 26 through user's brain.
The invention has the beneficial effects as follows: the zoom lens that focus adjustable is set at the rear side of display screen, by adjusting the focal length of these zoom lens, the image that display screen is shown carried out optical processing before entering the human eye needing to correct defects of vision, thus the human eye making needs correct defects of vision can see image clearly, do not need other wearing spectacles, and improve the comfort level of user, the injury to eyes can also be avoided.
The foregoing is only embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize instructions of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.

Claims (10)

1. a zoom helmet, is characterized in that, comprising:
Picture frame, display screen and zoom lens;
Wherein, described display screen and zoom lens are fixed on picture frame indirectly or directly; Described zoom lens are arranged on the side of the close human eye of display screen;
Described display screen is used for displays image information;
The focus adjustable of described zoom lens, and adopt suitable focal length by the light refraction from described display screen to the pupil of human eye, and be imaged on human eye retina.
2. zoom helmet according to claim 1, is characterized in that, described zoom lens are liquid crystal lens, or liquid lens.
3. zoom helmet according to claim 2, is characterized in that, described zoom lens change focal length by the change of driving voltage.
4. zoom helmet according to claim 1, is characterized in that, described zoom lens are single element lens, or multi-disc lens.
5. zoom helmet according to claim 1, is characterized in that, described display screen is directly fixed on picture frame; Or,
Described picture frame is fixed with eyeglass; Described display screen is a miniature display screen curtain, and it is embedded in described eyeglass.
6. zoom helmet according to claim 1, is characterized in that, described zoom helmet is intelligent glasses; Described intelligent glasses is monocular intelligent glasses or binocular intelligent glasses.
7. the zoom helmet according to any one of claim 1 to 6, it is characterized in that, comprise zoom drive circuit, for when opening described display screen and making it show image, the focal length adjusting described zoom lens makes the clear picture be imaged on human eye retina.
8. zoom helmet according to claim 7, is characterized in that, the picture size k of described display screen display meets the following conditions:
k &le; ( g d + f - g f ) p + ge d ,
Wherein, g is the spacing of described display screen and described zoom lens, and d is described zoom lens and the oculopupillary spacing of people, and f is the focal length of described zoom lens, and p is the size of described zoom lens, and e behaves oculopupillary size.
9. zoom helmet according to claim 8, is characterized in that, when normal visual acuity or the myopia of user, user adjusts the focal length of described zoom lens, within the image that described display screen is shown is positioned at described zoom lens one times of focal length; Following relation is met between each parameter:
fg f - g + d > 2 f &prime; , F ' is people's eyeball focal length.
10. zoom helmet according to claim 8, it is characterized in that, when normal visual acuity or the long sight of user, user adjusts the focal length of described zoom lens, and the image that described display screen is shown is described zoom lens one times between focal length and two focus length; Following relation is met between each parameter:
t is people's eye pupil hole and amphiblestroid spacing.
CN201410559707.6A 2014-10-20 2014-10-20 Zoom head-worn equipment Pending CN104407437A (en)

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CN109106567A (en) * 2018-08-29 2019-01-01 中国科学院长春光学精密机械与物理研究所 A kind of more sighting distance display systems for myopia
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