CN106444046A - Optical system and head-mounted display device provided with optical system - Google Patents
Optical system and head-mounted display device provided with optical system Download PDFInfo
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- CN106444046A CN106444046A CN201611155518.8A CN201611155518A CN106444046A CN 106444046 A CN106444046 A CN 106444046A CN 201611155518 A CN201611155518 A CN 201611155518A CN 106444046 A CN106444046 A CN 106444046A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/017—Head mounted
- G02B27/0172—Head mounted characterised by optical features
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Abstract
The invention discloses an optical system and a head-mounted display device provided with the optical system. The optical system is located between an image generation unit and an image receiver, and comprises a lens, a light splitting assembly, a light modulation assembly and a polarization filter, wherein the lens is used for forming a pre-set focal distance of image optical information of an image generation unit; the light splitting assembly is used for enabling target light in the image optical information of the image generation unit to move back and forth for a plurality of times to pass through the lens and then enter the image receiver, and comprises a first light splitting device arranged between the lens and the image generation unit and a second light splitting device arranged between the lens and the image receiver; the light modulation assembly is used for modulating a polarization state of incident polarized light; and the polarization filter is used for stopping scattered light from entering the image receiver. The head-mounted display device comprises the optical system and the image generation unit. The optical device disclosed by the invention is relatively simple and effective; and a light path can be shortened through utilizing one piece of the lens, and the whole weight of the display device is reduced. The device has a small total length, a small size and a light weight and is convenient for a user to carry and use.
Description
Technical field
The present invention relates to display technology field, more particularly to a kind of optical system and the wear-type of the optical system is assembled
Display device.
Background technology
With the progress in epoch, head-mounted display (Head-Mounted Display, HMD) is just gradually coming into the life of people
Living, which has overturned the visual experience that conventional display device is brought to user, with stronger feeling of immersion and sense of reality.Wear aobvious
Show that device has highly important application and commercial value, existing in culture diffusion, amusement game, military training, medical diagnosiss, virtuality
The fields such as real and augmented reality are all widely used.
Head-mounted display will be worn on the head of user, and its weight and volume will be as little as possible.Head-mounted display is made
For a kind of display device, Optical devices are one of its core components, and the existing Optical devices for being applied to head mounted display can
It is divided into coaxial and off-axis two kinds.Coaxial optical device volume is big, weight is big, image quality is poor, it is difficult to solve the big angle of visual field and big
Contradiction of the emergent pupil between device miniaturization.In off-axis optics device, number of lenses is less with respect to coaxial optical device, but one
As be also more than two panels, other its more difficult, high cost of assembling, volume and weight also is difficult to reduction.
With the raising of optics machining accuracy, free-form surface lens are little by little applied to wear display Optical devices
In.Free-form surface lens can reduce the volume and weight of device, lift image quality.But it is related to free song in existing document
Application of the face lens in display is worn still has that volume is excessive, simultaneously because Free-Form Surface Machining difficulty is big, phase
Answer the manufacturing cost of Optical devices higher.
First technology " Optical devices based on the head mounted display of sphere-prism " (Chinese invention patent
CN102692709A a kind of off-axis formula head-mounted display of use two panels optical component, in), is disclosed.At least wrap in the invention
Containing a sphere-prism and spherical lenss, although which has corrected aberration, but its weight and volume is all larger, it is impossible to wearing
Person provides preferable comfort level.
First technology " two-piece free-form surface head mounted display Optical devices " (Chinese invention patent CN101900872A)
Disclose a kind of two-piece free-form surface device.The invention mainly includes free-form surface lens and free curved surface prism, because should
Device is off-axis device, so device length has reduced, but still longer, not substantive in terms of reduction device physical dimension
The breakthrough of property.In addition, the image source in the invention is fitted with free-form surface lens, image source changes difficult, maintenance penalty height.
Content of the invention
It is contemplated that overcoming the shortcomings of first technology, it is proposed that a kind of operating distance is short, compact conformation, with big visual field
The light optical system of angle and big exit pupil diameter and assemble the head-mounted display apparatus of the optical system.
For solving above-mentioned technical problem, the present invention is adopted the following technical scheme that：
The present invention provides a kind of optical system, and the optical system is Wei Yu image generation unit and picture receiver between.Should
Optical system includes：
Lens, the image optical information for generating to image generation unit forms predetermined focal length；
Spectrum groupware, for making the target light in the image optical information of image generation unit generation come and go repeatedly through saturating
Picture receiver is entered after mirror, and including the first beam splitter and the second beam splitter, the first beam splitter is located at lens and image generates list
Between unit, the second beam splitter is Wei Yu lens and picture receiver between；
Light modulation element, for modulating the polarization state of the polarized light of incidence；And
Polarization filter, for stop image generation unit generate image optical information in spurious rays enter image connect
Receive device.
For above-mentioned optical system, the first beam splitter is used for transmission and has the light of the first polarization state and reflecting having and the
The light of the second orthogonal polarization state of one polarization state.
For above-mentioned optical system, the first beam splitter is that lens are coated with polarization beam splitter near image generation unit side
Surface or the polarization spectro piece between lens and image generation unit.
For above-mentioned optical system, the second beam splitter is used for incident light transmission a portion and reflects remaining
Part.
For above-mentioned optical system, the second beam splitter is semi-transparent semi-reflecting lens.
For above-mentioned optical system, the image optical information that image generation unit is generated is polarized light, or the optical system
Also include the polarization shaper between image generation unit and the first beam splitter, for retaining the line parallel with its light transmission shaft
Polarized light.
For above-mentioned optical system, it is polaroid to polarize shaper.
For above-mentioned optical system, the light transmission shaft as the polaroid of polarization shaper is inclined with what image generation unit sent
The polarization direction of the polarized light that the light that light or image generation unit send that shakes is formed through first time polarization is vertical.
For above-mentioned optical system, Light modulation element includes the first photomodulator between lens and the second beam splitter
And the second photomodulator Wei Yu the second beam splitter and polarization filter between.
For above-mentioned optical system, the first photomodulator is phase variable chronotron or quarter-wave plate.
The polarized light sent with image generation unit by above-mentioned optical system, the fast axle of the first photomodulator or image life
The polarization direction angle of the polarized light that the light for becoming unit to send is formed through first time polarization is 45 °.
For above-mentioned optical system, the second photomodulator is phase variable chronotron or quarter-wave plate.
For above-mentioned optical system, the fast axle of the second photomodulator is vertical with the fast axle of the first photomodulator.
For above-mentioned optical system, phase variable chronotron is used for producing phase delay to the light of incident specific wavelength.
For above-mentioned optical system, phase variable chronotron the light of incident specific wavelength is produced quarter-wave or
Equivalent quarter-wave phase delay.
For above-mentioned optical system, phase variable chronotron produces the wavelength of the light of phase delay by phase variable chronotron
Voltage or electric current determine.
For above-mentioned optical system, polarization filter is polaroid.
For above-mentioned optical system, lens, spectrum groupware, Light modulation element and polarization filter attach to form lens
Group.
For above-mentioned optical system, lens are the lens group of multiple lens combinations.
For above-mentioned optical system, lens two sides type is respectively arbitrary in plane, sphere, aspheric surface or free form surface
Kind.
The present invention also provides a kind of head-mounted display apparatus, and the head-mounted display apparatus include above-mentioned optical system and are located at
Image generation unit in same optical axis.
For above-mentioned head-mounted display apparatus, the image that image generation unit is generated is monochromatic or coloured image.
For above-mentioned head-mounted display apparatus, image generation unit is liquid crystal on silicon tricolor projection device.
Compared with prior art, the main advantage of technical solution of the present invention is as follows：
In the head-mounted display apparatus of the present invention, by catadioptric repeatedly using lens material and marginal refractive, one is formed
The physical essence repeatedly utilized by piece lens so that obtain two panels using a piece of lens or picture that more multi-disc lens can be only achieved
Matter, it is achieved thereby that realize the requirement of identical image quality using less thickness and volume.
Meanwhile, the Optical devices of the present invention are more succinct effectively can to use a piece of lens, be conducive to shortening light path, reduce
The overall weight of display device.Device overall length is little, and small volume is lightweight, is easy to user to carry and use.
Additionally, the head-mounted display apparatus of the present invention are adjusted to the light of different wave length using liquid crystal phase place variable delay
System, is screened to light using polarization theory, while using catadioptric mode, repeatedly using lens, providing appropriate light Jiao
Degree so that light can enter human eye to connect subparallel state, it is achieved that for the head-mounted display eyepiece of virtual reality
Design.
Further, the angle of visual field of the Optical devices of the head-mounted display apparatus of the present invention can accomplish very big, Yong Hupei
Wear comfortable and feeling of immersion strong, in addition, the exit pupil diameter of the Optical devices can accomplish very big, the pupil being easy to wearer's eyes
Coupling.
Further, the liquid crystal phase place variable delay used in the Optical devices of the head-mounted display apparatus of the present invention can
To be applied to multi-wavelength situation, colored display can be realized.
Other features and advantages of the present invention will be illustrated in the following description, also, partly be become from description
Obtain it is clear that or being understood by implementing the present invention.The purpose of the present invention and other advantages can pass through in the explanation that is write
In book, claims and accompanying drawing, specifically noted structure is realizing and obtain.
Description of the drawings
By reading the detailed description of hereafter preferred implementation, various other advantages and benefit are common for this area
Technical staff will be clear from understanding.Accompanying drawing is only used for illustrating the purpose of preferred implementation, and is not considered as to the present invention
Restriction.And in whole accompanying drawing, it is denoted by the same reference numerals identical part.In the accompanying drawings：
Fig. 1 is the structural representation of the head-mounted display apparatus described in the embodiment of the present invention；
Fig. 2 is the structural representation of the head-mounted display apparatus described in the embodiment of the present invention 1；
Fig. 3 be liquid crystal phase place variable delay in the embodiment of the present invention 1 in a kind of state when structural representation；
Fig. 4 be liquid crystal phase place variable delay in the embodiment of the present invention 1 in another kind of state when structural representation；
Fig. 5 is the display sequential chart of the liquid crystal on silicon tricolor projection device in the embodiment of the present invention 1；
Fig. 6 is the control timing diagram of the liquid crystal phase place variable delay in the embodiment of the present invention 1；
Fig. 7 is the structural representation of the head-mounted display apparatus described in the embodiment of the present invention 2.
Specific embodiment
The exemplary embodiment of the disclosure is more fully described below with reference to accompanying drawings.Although the disclosure is shown in accompanying drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure and should not be by embodiments set forth here
Limited.Conversely, provide these embodiments to be able to be best understood from the disclosure, and can be by the scope of the present disclosure
Those skilled in the art is intactly conveyed to.
Fig. 1 shows the structural representation of the optical system described in one embodiment of the invention.
As shown in figure 1, the optical system of the present invention is located at image generation unit 1 and picture receiver 2 for example between human eye.
The optical system includes lens 3, and the image optical information that lens 3 are used for generating image generation unit forms predetermined focal length.Thoroughly
Mirror 3 can be the uniform lens of material, and its material is not limited, for example, can be glass or transparent organic glass, additionally, lens 3 also may be used
Think balsaming lenss or the lens group of two or more material compositions.Additionally, in lens 3, the face type of lens can be plane,
Certain curvature, such as sphere, aspheric surface or free form surface can be carried.
The optical system of the present invention includes spectrum groupware 4, for making in the image optical information that image generation unit is generated
Target light comes and goes repeatedly and enters picture receiver 2 after lens 3.The spectrum groupware includes the first beam splitter 41 and second point
Light device 42, the first beam splitter 41 is Wei Yu lens 3 and image generation unit 1 between, and the second beam splitter 42 is located at lens 3 and image connects
Receive between device 2.First beam splitter 41 is used for transmission to be had the line polarized light of the first polarization state and reflects with orthogonal second
The line polarized light of polarization state, can be attached to lens 3 towards the polarization beam splitter in the one side of image generation unit 1, as
Substitute the polarization spectro piece that can also be provided between lens 3 and image generation unit 1.Second beam splitter 42 is used for incidence
Light transmission a portion and also reflect remainder, can be semi-transparent semi-reflecting lens, make a light part incident thereon
Through and another part reflection, can determine according to specific requirement, here is not done specifically through ratio of the light with reflected light
Limit.
The optical system of the present invention includes Light modulation element 5, for modulating the polarization state of the polarized light of incidence.Light modulation group
Part includes the first photomodulator 51 and the second photomodulator 52, and the first photomodulator 51 is that quarter-wave plate or phase variable prolong
When device, the second photomodulator 52 is quarter-wave plate or phase variable chronotron.Phase variable chronotron is used for incidence
The light of specific wavelength produces phase delay.In a preferred embodiment, using liquid crystal phase place variable delay to different wave length
Light be modulated.Phase variable chronotron can adapt to the light of multi-wavelength, and therefore the display device can show cromogram
Picture, the image that therefore image generation unit 1 is generated can be monochromatic, or colour.
The optical system of the present invention includes polarization filter 6, for stopping the image optical information of image generation unit generation
In spurious rays enter picture receiver 2.Polarization filter 6 can be a polaroid.
The head-mounted display apparatus of the present invention include above-mentioned optical system and the image generation unit in same optical axis
1.
In one embodiment, the light of 1 outgoing of image generation unit does not have polarization characteristic, and the light incides polarization shape
Grow up to be a useful person after 7, polarizing shaper 7 makes the light of incidence occur polarization to form line polarized light.Polarization shaper 7 can be for example one
Polaroid.Linear polarizer is as the polaroid for polarizing shaper 7 and as the polaroid of polarization filter 6, can make partially
The direction light parallel with linear polarizer printing opacity direction that shakes passes through, and light vertical with linear polarizer printing opacity direction for polarization direction is hidden
Gear, such that it is able to by specific light transmission.
In another embodiment, image generation unit 1 and polarization shaper 7 can be realized using mobile phone display screen, handss
The light that machine display screen sends is usually line polarized light, therefore can be directly with mobile phone alternate image signal generating unit 1 and polarization shape
Grow up to be a useful person 7.Image generation unit 1 can also be micro-display or micro projector, and every display that can emit beam all may be used
Using as image source.The micro-projector of trichroism (RGB) shadow casting technique of liquid crystal on silicon (LCOS) can such as be used as the present embodiment
Head-mounted display apparatus image generation unit 1.
Embodiments of the invention 1 provide a kind of head-mounted display apparatus, as shown in Fig. 2 which includes mobile phone 11, polarization spectro
Piece 411, lens 3, first phase variable delay 511, semi-transparent semi-reflecting lens 421, second phase variable delay 521 and polarization
Piece 61.
Specifically, image optical information is from the display screen outgoing of mobile phone 11, in embodiments of the invention, from the display of mobile phone 11
The light of screen outgoing has polarization characteristic, referred to as the first line polarized light, and the first line polarized light is through polarization spectro piece 411 and lens 3
Transmission after incide first phase variable delay 511, after the Phase delay of first phase variable delay 511 formed
After first direction of rotation circularly polarized light, the first direction of rotation circularly polarized light forms the first reflected light after semi-transparent semi-reflecting lens 421
With the first transmitted light, after the first reflected light is again incident on first phase variable delay 511, through first phase Variable delay
Formation polarization direction second line polarized light vertical with the polarization direction of the first line polarized light after the Phase delay of device 511, second
Line polarized light is reflected by polarization spectro piece 411 after 3 deviation of lens, incides first phase variable after being again passed through lens 3
Chronotron 511, and direction of rotation and the first direction of rotation circular polarization is formed after 511 Phase delay of first phase variable delay
The second contrary direction of rotation circularly polarized light of the direction of rotation of light, the second direction of rotation circularly polarized light is through semi-transparent semi-reflecting lens 421
Afterwards, the second reflected light and the second transmitted light are formed, and the second transmitted light forms polarization after second phase variable delay 511
Direction second line polarized light parallel with the printing opacity direction of the second polaroid 7, the second line polarized light is entered after polaroid 61
Human eye.
In the above-described embodiments, the printing opacity direction of principal axis of polaroid 61 is vertical with the polarization direction of the first line polarized light, and first
Transmitted light forms the polarization direction of polarization direction and the first line polarized light after 521 Phase delay of second phase variable delay
The second parallel line polarized light, as its polarization direction is vertical with the printing opacity direction of polaroid 61, is therefore blocked by polaroid 61,
Cannot be introduced into human eye.Additionally, the second transmitted light incides human eye, the second reflected light is again by first phase variable delay
511 and lens 3, polarization spectro piece 411 is then passed through, is no longer turned back in the optical path afterwards.
The fast axle of first phase variable delay 511 is 45 ° with the angle of the polarization direction of the first line polarized light.Second phase
The fast axle of position variable delay 521 is vertical with the fast axle of first phase variable delay 511, i.e. second phase variable delay
521 fast axle is -45 ° with the polarization direction angle of the first line polarized light.Additionally, semi-transparent semi-reflecting eyeglass 421 is primarily served to light
Line carries out reflection and transmission effect, does not change polarization of light state.So as to by arrange first phase variable delay 511, the
Two phase variable delay 521 and polaroid 61 are realizing the transmission to specific light.
In the present embodiment, as shown in Fig. 2 polarization spectro piece 411, first phase variable delay 511, semi-transparent semi-reflecting lens
421st, second phase variable delay 521 and polaroid 61 can be planar structure, alternatively curved-surface structure, according to specific aobvious
Show that requirement is specifically designed.
In the head-mounted display apparatus of the present embodiment, by catadioptric repeatedly using lens material and marginal refractive, formed
The physical essence repeatedly utilized by a piece of lens so that obtain two panels using a piece of lens or more multi-disc lens can be only achieved
As matter, it is achieved thereby that realize the requirement of identical image quality using less thickness and volume.Meanwhile, the optics dress of the present invention
Put more succinct effectively can use a piece of lens, be conducive to shortening light path, the overall weight of reduction display device.
Further, the angle of visual field of the Optical devices of the head-mounted display apparatus described in above-described embodiment can be accomplished very
Greatly, user's comfortable wearing and feeling of immersion are strong, in addition, the exit pupil diameter of the Optical devices can be accomplished very big, are easy to and wearer
The pupil coupling of eyes.
In one embodiment, by polarization spectro piece 411, lens 3, first phase variable delay 511, semi-transparent semi-reflecting lens
421st, second phase variable delay 521 and polaroid 61 attach formation one successively.Alternatively, it is also possible to select will be close to
The unit of mirror 3 is attached on lens 3, for example, can attach to polarization spectro piece 411 on a surface of lens 3 and by
One phase variable chronotron 511 is attached on another surface of lens 3.
Additionally, above-mentioned unit can also be distance away, i.e. polarization spectro piece 411, lens 3, the first phase
Position variable delay 511, semi-transparent semi-reflecting lens 421, second phase variable delay 521 and polaroid 61, adjacent two lists
All distance away between unit, this distance is designed according to specific Optical devices image quality.
In addition it is also possible to unit is attached on lens 3, for example, first phase variable delay 511 is attached to
On lens 3, semi-transparent semi-reflecting lens 421, second phase variable delay 521 and polaroid 61 are each independently arranged, and semi-transparent
Semi-reflective mirror 521, second phase variable delay 521 and polaroid 61 can be planar structures, it is possible to use curved-surface structure, root
It is configured according to specific optical system.
By above-mentioned setting, can further reduce the volume of head-mounted display apparatus, it is achieved thereby that device overall length
Little, small volume, lightweight, carry in order to user and use.
In a preferred embodiment, mobile phone 11 is replaced by micro- projection of trichroism (RGB) shadow casting technique of liquid crystal on silicon (LCOS)
Instrument and the first polaroid 71.The projector first separates the imaging mode of recombinant using three element of three-chip type RGB, using people
Eye visual persistence effect, at times by redgreenblue light alternating projection in proportion, forms coloured image.Its projection sequential signal
Figure is as shown in Figure 3.In Enable Pin in the case of effectively, being triggered by clock signal, and three kinds of coloured light of alternating projection, and one
In secondary enable time, two-wheeled projection is carried out, to reach the purpose for being constituted coloured image.
First phase variable delay 511 and second phase variable delay 521 used in the present embodiment is liquid crystal
Phase variable chronotron, its internal structure is as shown in Figure 3.The liquid crystal for being used is nematic crystal, permissible by extra electric field
Sensing forms birefringent layers.As shown in figure 3, vitreous silica 501, transparent Indium stannum indium (ITO) 502, the material 503 at offer interval
The electronic control part of liquid crystal phase place variable delay is collectively formed with alignment films polyimides (PI) 505, thereon plus different
Voltage i.e. can achieve to liquid crystal molecule 504 deflect control.In addition, Fig. 3 illustrates the situation of liquid crystal wave plate maximum delay；Fig. 4
The deflection situation of liquid crystal molecule 504 is shown, now liquid crystal wave plate has the minimum delay, and auxiliary voltage is maximum thereon.Liquid crystal divides
Son deflect under voltage angle, θ and V relation equation below shown in：
Wherein, VthFor threshold voltage,Wherein, KIIFor the splay elastic constant of liquid crystal molecule,
ε0For permittivity of vacuum, εII、ε⊥The respectively parallel and axial dielectric constant of tilted LC molecule, V0Inclined for liquid crystal molecule
Go to the voltage of a certain special angle.With the change of θ, refractive index n of the light inside liquid crystal wave plateeff(θ) can also become
Change, meet following relation：
Now the liquid crystal wave plate phase-delay quantity δ additional to light is：
Wherein, n0And neThe refractive index of respectively o light and e light, d is the thickness of liquid crystal wave plate, λ be.
From the foregoing, it will be observed that can be calculated with the angle for needing to add according to the wavelength of the light of required adjustment now needing in liquid
Voltage swing on brilliant wave plate.When image generation unit 1 launches colourama, for its a certain two field picture, in certain time period
Interior, by adjusting the voltage of the first liquid crystal phase place variable delay and the second liquid crystal phase place variable delay so that the first liquid crystal
Phase variable chronotron and the second liquid crystal phase place variable delay produce a quarter and negative a quarter to the light of a certain wavelength
Or the phase delay of equivalent a quarter and equivalent negative a quarter.Within another time period, by adjusting the first liquid crystalline phase
Position variable delay and the voltage of the second liquid crystal phase place variable delay so that the first liquid crystal phase place variable delay and institute
State the second liquid crystal phase place variable delay the light of another wavelength is produced a quarter and negative a quarter or equivalent four/
One and the phase delay of equivalent negative a quarter.Due to the visual lag effect of human eye, human eye is will be seen that from image generation unit 1
The a certain color image frame of transmitting, realizes the colored purpose for showing.
The voltage on first phase variable delay 511 and second phase variable delay 521 is applied to image in Fig. 5
The sequential of the sent three coloured light of signal generating unit 1 (RGB) matches, so in its sequencing contro such as Fig. 6 shown in Vth and Vth'.
First phase variable delay 511 and second phase variable delay 521 all using liquid crystal phase place variable delay,
By controlling voltage or the electric current of liquid crystal phase place variable delay, phase delay can be produced to the light of incident specific wavelength,
For example quarter-wave or equivalent quarter-wave phase delay can be produced to incident light.It should be noted that
The phase place of time delay can be configured according to specific requirement, be not specifically limited herein.
Further, the phase variable time delay used in the Optical devices of the head-mounted display apparatus described in above-described embodiment
Device goes for multi-wavelength situation, can realize colored display.In use, when image generation unit 1 launches colourama,
For a certain two field picture of transmitting, in certain time period, by adjusting the first liquid crystal phase place variable delay and the second liquid crystal
The voltage of phase variable chronotron or electric current so that the first liquid crystal phase place variable delay and the second liquid crystal phase place Variable delay
Device produces the phase delay of a quarter or equivalent a quarter to the light of a certain wavelength.Within another time period, by adjusting
Save voltage or the electric current of the first liquid crystal phase place variable delay and the second liquid crystal phase place variable delay so that the first liquid crystalline phase
Position variable delay and the second liquid crystal phase place variable delay the light of another wavelength is produced a quarter or equivalent four/
One phase delay.Due to the visual lag effect of human eye, therefore human eye will be seen that a certain frame that launches from image generation unit 1
Coloured image.
Additionally, the head-mounted display apparatus described in above-described embodiment are using liquid crystal phase place variable delay to different wave length
Light is modulated, and using polarization theory, light is screened, while using catadioptric mode, repeatedly using lens, providing suitable
When focal power so that light can enter human eye to connect subparallel state, it is achieved that wear display for virtual reality
The design of device eyepiece.
Embodiments of the invention 2 wear formula image display device as shown in fig. 7,21 be device exit pupil position, 22 be human eye
Retina position.
As shown in fig. 7, the light that image generation unit 1 is produced can consider not has polarization characteristic, through the first polarization
After piece 71, it is assumed that light is first line polarized light of the direction of vibration along x-axis, there is deviation in the first line polarized light at lens 3, so
Afterwards when by the first quarter-wave plate 512, the phase place of 1/4 wavelength is attached, so as to be modulated to right-handed polarized light, this light
Line has been divided into two bundles, respectively spurious rays and target light in the presence of semi-transparent semi-reflecting lens 421.
On semi-transparent semi-reflecting lens 421, occur the light of transmission as spuious through the light of the first quarter-wave plate 512
Light.Spurious rays continue to propagate forward through semi-transparent semi-reflecting lens 421, then by 522 affix 1/4 of the second quarter-wave plate
The phase place of wavelength, is modulated to line polarized light, and polarization direction is along x-axis.As the printing opacity direction of principal axis of the second polaroid 61 is inclined with first
The piece 71 that shakes is vertical, is that so spurious rays can not pass through the second polaroid 61, human eye is not it is observed that this light along the y-axis direction
Line.Therefore, this Optical devices can make spurious rays pass through, and target light is normally passed through, and realize screening light
Purpose.
The light for being reflected by semi-transparent semi-reflecting lens 421 through the light of the first quarter-wave plate 512 is target light.By
It is occur on the interface of optically thinner medium to optically denser medium in reflection, so target light can add the phase contrast of a π, incident
Right-handed polarized light reflection after become for left-hand polarization light.The left-hand polarization light is attached through the first quarter-wave plate 512
The phase place of upper 1/4 wavelength, is modulated to second line polarized light of the polarization direction along y-axis, then the second line polarized light warp in lens 3
Certain deviation is crossed, is reflected towards the one side 412 for being coated with polarization beam splitter of image generation unit 1 by lens 3, reflection now
Occur on the interface of optically denser medium to optically thinner medium, without additive phase.Then target light third time is through the one or four point
One of wave plate 512, be modulated to the second left-hand polarization light.Second left-hand polarization light propagates across forward semi-transparent semi-reflecting lens afterwards
421 and second quarter-wave plate 522 be modulated to line polarized light of the polarization direction along y-axis, this polarization state and the second polaroid
61 printing opacity direction is consistent, can normally outgoing, received by human eye.
First polaroid 71 of the present embodiment and the second polaroid 61 are linear polarizer and the first polaroid 71 and
The printing opacity direction of principal axis of two polaroids 61 is vertical, such that it is able to realize the selectivity to the light for passing through.
The fast axle of the first quarter-wave plate 512 is 45 ° with the axial angle of the printing opacity of the first polaroid 71.Two or four
The fast axle of/mono- wave plate 522 is vertical with the fast axle of the first quarter-wave plate 512, i.e., the second quarter-wave plate 512 is fast
The light transmission shaft angular separation of axle and the first polaroid 71 is -45 °.Additionally, semi-transparent semi-reflecting eyeglass 421 is primarily served carrying out to light
Reflection and transmission effect, do not change polarization of light state.So as to by arranging the first polaroid 71, the first quarter-wave plate
512nd, the second quarter-wave plate 522 and the second polaroid 61 are realizing the transmission to specific light.
In the present embodiment, the first polaroid 71, the first quarter-wave plate 512, the 421, the 2nd 4 point of semi-transparent semi-reflecting lens
One of wave plate 522 and the second polaroid 61 can be planar structure, or curved-surface structure, according to specific display require into
Row is specific to be designed.
In one embodiment, by the first polaroid 71, lens 3, the first quarter-wave plate 512, semi-transparent semi-reflecting lens
421st, the second quarter-wave plate 522 and the second polaroid 61 attach formation one successively.Alternatively, it is also possible to select will be close to
The unit of lens 3 is attached on lens 3, such as can be attached to the first polaroid 71 on a surface of lens 3, by the one or four
/ mono- wave plate 512 is attached on another surface of lens 3.
Further, as shown in figure 1, distance away between the first polaroid 71 and lens 3, in 3 direction of lens
First quarter-wave plate 512, semi-transparent semi-reflecting lens 421, second quarter-wave plate are attached on the surface of picture receiver 2 successively
522 and second polaroid 61.
Additionally, above-mentioned unit can also be distance away, i.e. the 3, the 1st point of the first polaroid 71, lens
One of wave plate 512, semi-transparent semi-reflecting lens 421, the second quarter-wave plate 522 and the second polaroid 61, adjacent two units
Between all distance away, this distance is designed according to specific Optical devices image quality.
In addition it is also possible to unit is attached on the first lens 3, as shown in fig. 7, by the first quarter-wave plate
512 attach on lens 3, semi-transparent semi-reflecting lens 421, the second quarter-wave plate 522 and the second polaroid 61 is respective independently sets
Put, the light path of its outgoing as shown in Figure 7, and semi-transparent semi-reflecting lens 421, the second quarter-wave plate 522 and the second polarization
Piece 61 can be planar structure, it is possible to use curved-surface structure, be configured according to specific optical system.
The present invention is due to employing single element lens, so distortion, aberration (especially chromatic longitudiinal aberration) cannot obtain effective school
Just.But distortion and aberration all can be corrected by the pre-correction techniques of existing software kit, in an embodiment of the present invention
Do not specifically describe.
In the head-mounted display apparatus of the present invention, by catadioptric repeatedly using lens material and marginal refractive, one is formed
The physical essence repeatedly utilized by piece lens so that obtain two panels using a piece of lens or picture that more multi-disc lens can be only achieved
Matter, it is achieved thereby that realize the requirement of identical image quality using less thickness and volume.
Meanwhile, the Optical devices of the present invention are more succinct effectively can to use a piece of lens, be conducive to shortening light path, reduce
The overall weight of display device.Device overall length is little, and small volume is lightweight, is easy to user to carry and use.
Further, the angle of visual field of the Optical devices of the head-mounted display apparatus of the present invention can accomplish very big, Yong Hupei
Wear comfortable and feeling of immersion strong, in addition, the exit pupil diameter of the Optical devices can accomplish very big, the pupil being easy to wearer's eyes
Coupling.
The above, the only specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, and any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be defined by the scope of the claims.
Claims (23)
1. a kind of optical system, between image generation unit and picture receiver, it is characterised in that the optical system bag
Include：
Lens, the image optical information for generating to image generation unit forms predetermined focal length；
Spectrum groupware, for making the target light in the image optical information of image generation unit generation come and go repeatedly after lens
Enter picture receiver, including the first beam splitter and the second beam splitter, the first beam splitter be located at lens and image generation unit it
Between, the second beam splitter is Wei Yu lens and picture receiver between；
Light modulation element, for modulating the polarization state of the polarized light of incidence；And
Polarization filter, for stop image generation unit generate image optical information in spurious rays enter image-receptive
Device.
2. optical system according to claim 1, it is characterised in that the first beam splitter is used for transmission and has the first polarization state
Light and reflect have second polarization state orthogonal with the first polarization state light.
3. optical system according to claim 2, it is characterised in that the first beam splitter is lens near image generation unit
Side is coated with the surface of polarization beam splitter or the polarization spectro piece between lens and image generation unit.
4. optical system according to claim 1, it is characterised in that the second beam splitter be used for incident light transmission its
A middle part and reflection remainder.
5. optical system according to claim 4, it is characterised in that the second beam splitter is semi-transparent semi-reflecting lens.
6. optical system according to claim 1, it is characterised in that the image optical information that image generation unit is generated is inclined
Shake light, or the optical system also includes the polarization shaper between image generation unit and the first beam splitter, for protecting
Stay the line polarized light parallel with its light transmission shaft.
7. optical system according to claim 6, it is characterised in that polarization shaper is polaroid.
8. optical system according to claim 7, it is characterised in that as polarization shaper polaroid light transmission shaft with
The polarized light that image generation unit sends or the light that image generation unit sends polarize the inclined of the polarized light for being formed through first time
The direction that shakes is vertical.
9. optical system according to claim 1, it is characterised in that Light modulation element is included positioned at lens and the second light splitting
The first photomodulator between device and the second photomodulator between the second beam splitter and polarization filter.
10. optical system according to claim 9, it is characterised in that the first photomodulator be phase variable chronotron or
Quarter-wave plate.
11. optical systems according to claim 10, it is characterised in that the fast axle of the first photomodulator generates list with image
The polarization direction angle of the polarized light that the polarized light that unit sends or the light that image generation unit sends are formed through first time polarization
For 45 °.
12. optical systems according to any one of claim 9 to 11, it is characterised in that the second photomodulator is phase place
Variable delay or quarter-wave plate.
13. optical systems according to claim 12, it is characterised in that the fast axle of the second photomodulator and the first light modulation
The fast axle of device is vertical.
14. optical systems according to claim 12, it is characterised in that phase variable chronotron is used for the specific of incidence
The light of wavelength produces phase delay.
15. optical systems according to claim 14, it is characterised in that phase variable chronotron is to incident specific wavelength
Light produce quarter-wave or equivalent quarter-wave phase delay.
16. optical systems according to claim 12, it is characterised in that phase variable chronotron produces the light of phase delay
Wavelength determined by the voltage of phase variable chronotron or electric current.
17. optical systems according to claim 1, it is characterised in that polarization filter is polaroid.
18. optical systems according to claim 1, it is characterised in that lens, spectrum groupware, Light modulation element and partially
The filter that shakes attaches to form lens group.
19. optical systems according to claim 1, it is characterised in that lens are the lens group of multiple lens combinations.
20. optical systems according to claim 1, it is characterised in that lens two sides type is respectively plane, sphere, non-
Any one in sphere or free form surface.
A kind of 21. head-mounted display apparatus, it is characterised in that include optical system as described in above-mentioned any one claim and
Image generation unit in same optical axis.
22. head-mounted display apparatus according to claim 21, it is characterised in that image generation unit generate image be
Monochromatic or coloured image.
23. head-mounted display apparatus according to claim 21, it is characterised in that image generation unit is liquid crystal on silicon three
Color projection arrangement.
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| CN201611155518.8A CN106444046A (en) | 2016-12-14 | 2016-12-14 | Optical system and head-mounted display device provided with optical system |
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|---|---|---|---|
| CN201611155518.8A CN106444046A (en) | 2016-12-14 | 2016-12-14 | Optical system and head-mounted display device provided with optical system |
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Family
ID=58217889
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| CN201611155518.8A Pending CN106444046A (en) | 2016-12-14 | 2016-12-14 | Optical system and head-mounted display device provided with optical system |
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| CN108169904A (en) * | 2017-12-28 | 2018-06-15 | 重庆爱奇艺智能科技有限公司 | A kind of component for being used to carry out presentation of information |
| CN108732755A (en) * | 2017-04-18 | 2018-11-02 | 乐金显示有限公司 | Display device with display module and eyepiece |
| CN110161690A (en) * | 2018-02-13 | 2019-08-23 | 双莹科技股份有限公司 | The optical system of head-mounted display is miniaturized |
| CN110596897A (en) * | 2019-09-17 | 2019-12-20 | 北京耐德佳显示技术有限公司 | Head-up display equipment |
| WO2020043879A1 (en) * | 2018-08-30 | 2020-03-05 | Vr Coaster Gmbh & Co. Kg | Head-mounted display and amusement device having a head-mounted display of this type |
| CN111443491A (en) * | 2020-04-30 | 2020-07-24 | 京东方科技集团股份有限公司 | Optical display system, control method and display device |
| CN111781698A (en) * | 2020-07-13 | 2020-10-16 | 成都忆光年文化传播有限公司 | Virtual display measuring and installing system |
| CN111929907A (en) * | 2020-09-25 | 2020-11-13 | 歌尔光学科技有限公司 | Image display structure and head-mounted display device |
| CN111929906A (en) * | 2020-09-25 | 2020-11-13 | 歌尔光学科技有限公司 | Image display structure and head-mounted display device |
| CN112132098A (en) * | 2020-09-30 | 2020-12-25 | 上海悠睿光学有限公司 | Fingerprint recognition device under screen and electronic equipment |
| CN112243076A (en) * | 2019-07-19 | 2021-01-19 | 宏达国际电子股份有限公司 | Electronic device |
| CN112711139A (en) * | 2021-01-04 | 2021-04-27 | 业成科技（成都）有限公司 | Near-to-eye display device and optical system thereof |
| CN115236858A (en) * | 2022-06-21 | 2022-10-25 | 京东方科技集团股份有限公司 | Optical system, display device, and control method |
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| CN108732755A (en) * | 2017-04-18 | 2018-11-02 | 乐金显示有限公司 | Display device with display module and eyepiece |
| CN108732755B (en) * | 2017-04-18 | 2023-11-10 | 乐金显示有限公司 | Display device with display module and eyepiece |
| CN108169904A (en) * | 2017-12-28 | 2018-06-15 | 重庆爱奇艺智能科技有限公司 | A kind of component for being used to carry out presentation of information |
| CN110161690A (en) * | 2018-02-13 | 2019-08-23 | 双莹科技股份有限公司 | The optical system of head-mounted display is miniaturized |
| WO2020043879A1 (en) * | 2018-08-30 | 2020-03-05 | Vr Coaster Gmbh & Co. Kg | Head-mounted display and amusement device having a head-mounted display of this type |
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| CN110596897A (en) * | 2019-09-17 | 2019-12-20 | 北京耐德佳显示技术有限公司 | Head-up display equipment |
| CN111443491A (en) * | 2020-04-30 | 2020-07-24 | 京东方科技集团股份有限公司 | Optical display system, control method and display device |
| WO2021218474A1 (en) * | 2020-04-30 | 2021-11-04 | 京东方科技集团股份有限公司 | Optical display system, control method, and display device |
| CN111781698A (en) * | 2020-07-13 | 2020-10-16 | 成都忆光年文化传播有限公司 | Virtual display measuring and installing system |
| CN111929906A (en) * | 2020-09-25 | 2020-11-13 | 歌尔光学科技有限公司 | Image display structure and head-mounted display device |
| CN111929907B (en) * | 2020-09-25 | 2021-07-30 | 歌尔光学科技有限公司 | Image display structure and head-mounted display device |
| CN111929907A (en) * | 2020-09-25 | 2020-11-13 | 歌尔光学科技有限公司 | Image display structure and head-mounted display device |
| CN112132098A (en) * | 2020-09-30 | 2020-12-25 | 上海悠睿光学有限公司 | Fingerprint recognition device under screen and electronic equipment |
| CN112711139A (en) * | 2021-01-04 | 2021-04-27 | 业成科技（成都）有限公司 | Near-to-eye display device and optical system thereof |
| WO2023231105A1 (en) * | 2022-05-30 | 2023-12-07 | 歌尔光学科技有限公司 | Optical module and head-mounted display device |
| TWI823428B (en) * | 2022-06-15 | 2023-11-21 | 大陸商業成科技（成都）有限公司 | Optical system |
| CN115236858A (en) * | 2022-06-21 | 2022-10-25 | 京东方科技集团股份有限公司 | Optical system, display device, and control method |
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