Utility model content
The technical problems to be solved in the utility model is to propose that a kind of light for sending image generation unit repeatedly comes and goesThe optical system of the contact lenses formula that can be directly worn on human eye of human eye is imported after lens focusing and the light is assembledThe head-mounted display of system.
In order to solve the above technical problems, the utility model is adopted the following technical scheme that：
The utility model provides a kind of contact lenses formula optical system, and the contact lenses formula optical system is generated positioned at imageBetween unit and human eye.The contact lenses formula optical system includes：
Lens, the image optical information for being generated to image generation unit forms predetermined focal length；
Spectrum groupware, the target light in image optical information for making image generation unit generation is come and gone repeatedly by saturatingEnter picture receiver, including the first optical splitter and the second optical splitter after mirror, the first optical splitter is located at lens and image generation is singleBetween member, the second optical splitter is located between lens and human eye；
Quarter-wave plate component, for increasing quarter-wave phase to transmitted light；And
Polarization filter, the spurious rays in image optical information for stopping image generation unit generation connect into imageReceive device,
Wherein, lens, spectrum groupware, quarter-wave plate component and polarization filter fit together to form stealthy eyeMirror.
For above-mentioned contact lenses formula optical system, the first optical splitter is used to transmit the light with the first polarization state and anti-Penetrate the light with second polarization state orthogonal with the first polarization state.
For above-mentioned contact lenses formula optical system, the first optical splitter is that lens are coated with partially close to image generation unit sideShake spectro-film surface or positioned at polarization spectro piece between lens and image generation unit.
For above-mentioned contact lenses formula optical system, the second optical splitter be used to transmiting incident light a portion andAnd reflection remainder.
For above-mentioned contact lenses formula optical system, the second optical splitter is spectroscope.
For above-mentioned contact lenses formula optical system, the image optical information of image generation unit generation is polarised light, orThe optical system also includes being attached to the first optical splitter towards the polarization shaper in image generation unit one side, for retain withThe parallel linearly polarized light of its light transmission shaft.
For above-mentioned contact lenses formula optical system, polarization shaper is polarizer.
For above-mentioned contact lenses formula optical system, generated as the light transmission shaft of the polarizer of polarization shaper with image singleThe polarization direction that the light that the polarised light or image generation unit that member is sent are sent polarizes the polarised light formed through first time is vertical.
For above-mentioned contact lenses formula optical system, quarter-wave plate component include positioned at lens and the second optical splitter itBetween the first quarter-wave plate and the second quarter-wave plate between the second optical splitter and polarization filter.
For above-mentioned contact lenses formula optical system, what the fast axle of the first quarter-wave plate was sent with image generation unitThe polarization direction angle that the light that polarised light or image generation unit are sent polarizes the polarised light formed through first time is 45 °.
For above-mentioned contact lenses formula optical system, the fast axle of the second quarter-wave plate and the first quarter-wave plateFast axle is vertical.
For above-mentioned contact lenses formula optical system, polarization filter is polarizer.
For above-mentioned contact lenses formula optical system, lens are the lens groups of simple lens or multiple lens gluings.
For above-mentioned contact lenses formula optical system, lens two sides type is respectively plane, sphere, extension double cubic surfaceOr any one in free form surface.
The utility model also provides a kind of head-mounted display.The head-mounted display includes above-mentioned contact lenses formula optical systemWith with its image generation unit in same optical axis.
For above-mentioned head-mounted display, the head-mounted display global shape is frame eyeglasses shape.
For above-mentioned head-mounted display, image generation unit is for integral type display and including left and right two parts, or bagInclude two displays in left and right.
For above-mentioned head-mounted display, the image that left and right two parts or the display of left and right two of image generation unit are shownBetween have parallax.
Compared with prior art, the main advantage of technical solutions of the utility model is as follows：
1st, imported after the light that image generation unit is sent being reflected and reflected using contact lenses formula optical systemThe eye of observer, because light is reflected and reflected twice in lens interior, therefore is equivalent to the aberration of two lensCalibration result, thus obtain it is enough as matter when reduce the size of system.
2nd, contact lenses formula optical system of the present utility model is more succinct, only needs a piece of lens, and system overall length is small, volumeIt is small, it is lightweight, it is easy to user to carry and use.
3rd, contact lenses formula optical system field of view angle of the present utility model is big, user's comfortable wearing and feeling of immersion is strong, is adapted toIt is used as the head-mounted display eyepiece of virtual reality.
4th, optical system exit pupil diameter is big in the utility model, is easy to match with the pupil of wearer's eyes.
5th, whole head-mounted display is similar to the structure of glasses, so compact conformation, small volume and lightweight, and haveThe angle of visual field is big, exit pupil diameter is big and the characteristics of good imaging quality.
Other features and advantages of the utility model will illustrate in the following description, also, partly from specificationIn become apparent, or understood by implementing the utility model.The purpose of this utility model and other advantages can pass throughSpecifically noted structure is realized and obtained in the specification, claims and accompanying drawing write.
Embodiment
The exemplary embodiment of the disclosure is more fully described below with reference to accompanying drawings.Although showing the disclosure in accompanying drawingExemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth hereLimited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosureComplete conveys to those skilled in the art.
Fig. 1 shows the structural representation of the contact lenses formula optical system described in the utility model one embodiment.
As shown in figure 1, contact lenses formula optical system 2 of the present utility model be located at image generation unit 1 and human eye 3 itBetween.The contact lenses formula optical system 2 includes lens 21, and lens 21 are used for the image optical information shape generated to image generation unitInto predetermined focal length.Lens 21 can be the uniform lens of material, and its material is not limited, for example, can be glass or transparent organic glassGlass, in addition, balsaming lens or lens group that lens 21 can also constitute for two or more materials.In addition, the two sides of lens 21The face type of middle either side can be plane, can also carry certain curvature, such as sphere, extension double cubic surface or freely bentFace.
Optical system of the present utility model includes spectrum groupware 22, for the image optical information for generating image generation unitIn target light come and go repeatedly after lens 21 enter human eye 3.The spectrum groupware includes the first optical splitter 221 and second pointLight device 222, the first optical splitter 221 is located between lens 21 and image generation unit 1, and the second optical splitter 222 is located at the He of lens 21Between human eye 2.First optical splitter 221 is used to transmit the linearly polarized light with the first polarization state and reflect have orthogonal secondThe linearly 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, asReplacement can also be provided in the polarization spectro piece between lens 3 and image generation unit 1.Second optical splitter 222 is used for enteringThe light penetrated transmits a portion and reflection remainder, can be spectroscope, makes a light part incident thereon thoroughlyCross and another part reflects, can be determined through light and the ratio of reflected light according to specific requirement, not do specific limit hereinIt is fixed.
Optical system of the present utility model includes quarter-wave plate component 23, for increasing quarter-wave to transmitted lightLong phase.Quarter-wave plate component 23 includes the first quarter-wave plate 231 and the second quarter-wave plate 232.
Optical system of the present utility model includes polarization filter 24, the image light for stopping image generation unit generationSpurious rays in information enter human eye 3.Polarization filter 24 can be a polarizer.
Lens 21, spectrum groupware 22, quarter-wave plate component 23 and polarization filter 24 fit together to form hiddenShape glasses.
Head-mounted display apparatus of the present utility model includes above-mentioned contact lenses formula optical system 2 and with it in same lightImage generation unit 1 on axle.Whole head-mounted display is similar to the structure of glasses.
Image generation unit 1 is image source, and image generation unit 1 can be mobile phone display screen, or micro-display, allIt is that the display that can be emitted beam can serve as image source applied in this optical system.Image generation unit 1 is integral typeDisplay or including the display of left and right two.
In one embodiment, the light of the outgoing of image generation unit 1 does not have polarization characteristic, and the light, which is incided, to be attached toFirst optical splitter 221 is towards the polarization shaper 25 in the one side of image generation unit 1, and polarization shaper 25 makes the light hair of incidenceRaw polarization forms linearly polarized light.It for example can be a polarizer to polarize shaper 25.It is used as the polarizer of polarization shaper 25Linear polarizer is with the polarizer as polarization filter 24, polarization direction can be made parallel with linear polarizer printing opacity directionLight passes through, and the polarization direction light vertical with linear polarizer printing opacity direction is blocked, so as to which specific light is passed through.
In another embodiment, image generation unit 1 and polarization shaper 25 can be realized using mobile phone display screen, handThe light that machine display screen is sent usually linearly polarized light, therefore can be directly with mobile phone alternate image generation unit 1 and polarization shapeGrow up to be a useful person 25.Image generation unit 1 can also be micro-display or micro projector, and every display that can be emitted beam all may be usedTo be used as image source.The micro-projector of liquid crystal on silicon (LCOS) three color (RGB) shadow casting technique can such as be used as the present embodimentHead-mounted display apparatus image generation unit 1.
As shown in Fig. 2 contact lenses formula optical system 1 described in the utility model embodiment 1 include along optical axis direction fromMobile phone 11 is to the polarization spectro piece 2211 set gradually between human eye 3, lens 21, the first quarter-wave plate 231, spectroscope2221st, the second quarter-wave plate 232 and polarizer 241.Specifically, image optical information is from the display screen outgoing of mobile phone 11,There is polarization characteristic, referred to as the first linearly polarized light from the light of the display screen outgoing of mobile phone 11, the first linearly polarized light is by polarization pointThe first quarter-wave plate 231 is incided after the transmission of mating plate 2211 and lens 21, by the phase of the first quarter-wave plate 231The circularly polarized light of the first direction of rotation is formed after the delay of position, the circularly polarized light of the first direction of rotation incides shape after spectroscope 2221Into the first reflected light and the first transmitted light.First transmitted light is changed into polarization direction and inclined after the second quarter-wave plate 232Shake the vertical linearly polarized light in printing opacity direction of piece 241, and the linearly polarized light can not be vertical with its polarization direction by printing opacity directionPolarizer 241.First reflected light is again incident on the first quarter-wave plate 231, by the phase of the first quarter-wave plate 231Polarization direction second linearly polarized light vertical with the polarization direction of the first linearly polarized light, the second linearly polarized light warp are formed after the delay of positionReflected after crossing the deviation of lens 21 by polarization spectro piece 2211, be again passed through inciding the first quarter-wave plate 231 after lens 21,And direction of rotation and the direction of rotation of the first direction of rotation circularly polarized light are formed after the phase delay of the first quarter-wave plate 231The circularly polarized light of the second opposite direction of rotation, the circularly polarized light of the second direction of rotation reflects by the formation of spectroscope 2,221 secondLight and the second transmitted light, the second transmitted light is by the second quarter-wave plate 232 formation polarization direction and the printing opacity of polarizer 241The second parallel linearly polarized light of direction, the second linearly polarized light enters human eye 3 after polarizer 241.
Wherein, the circularly polarized light of the first direction of rotation is right-handed polarized light or left-hand polarization light.
In the above-described embodiments, the printing opacity direction of principal axis of polarizer 241 is vertical with the polarization direction of the first linearly polarized light, and firstTransmitted light forms the polarization direction of polarization direction and the first linearly polarized light after the phase delay of the second quarter-wave plate 232The second parallel linearly polarized light, because its polarization direction is vertical with the printing opacity direction of polarizer 241, therefore is hidden by polarizer 241Gear, it is impossible to enter human eye 3.In addition, the second transmitted light incides human eye, the second reflected light is again by the first quarter-wavePiece 231 and lens 21, then through polarization spectro piece 2211, no longer turn back in the optical path afterwards.
This contact lenses formula optical system only needs a piece of lens.Lens 21 can be simple lens, or reach identicalThe lens group of lens or the poly-lens composition of the multi-disc lens gluing of effect.Surface of the lens 21 towards the side of mobile phone 11Can be any one in plane, common sphere, aspherical, free form surface and extension double cubic surface.The direction of lens 21The surface of the side of human eye 3 can be any in plane, common sphere, aspherical, free form surface and extension double cubic surfaceIt is a kind of.
Polarization spectro piece 2211 is used to transmit the linearly polarized light parallel with the polarization direction of the first linearly polarized light and reflectionThe linearly polarized light vertical with the polarization direction of the first linearly polarized light.
First quarter-wave plate 231 and the second quarter-wave plate 232 are used to increase transmitted light the phase of 1/4 wavelengthPosition, and the fast axle of the first quarter-wave plate 231 and the polarization direction angle of the first linearly polarized light are 45 °, the two or four/The fast axle of one wave plate 232 and the polarization direction angle of the first linearly polarized light are -45 °.
Spectroscope 2221 is mainly used in reflecting light and being transmitted, and does not play a part of changing polarization of light state.The light splitting ratio of spectroscope 2221 is set according to system actual demand.
Preferably, polarization spectro piece 2211, the first quarter-wave plate 231, spectroscope 2221, the second quarter-wave plate232 and polarizer 241 grow, be deposited with or be fitted in lens successively according to order by way of crystal production or plated film21 surface.
The advantage of above-mentioned contact lenses formula optical system is to realize two panels or more multi-disc lens just using a piece of lensThe picture matter that can be reached, it is achieved thereby that the requirement of identical image quality is realized using smaller thickness and volume, it is small to arrive the opticsSystem can make the thin slice similar to contact lenses.The system completes the image quality that a piece of lens reach several lensReason is multiple by reflecting reflection, using lens material and marginal refractive, so as to form what a piece of lens were repeatedly utilizedPhysical essence.
Contact lenses formula optical system described in embodiment 2 of the present utility model is as shown in Figure 3.Image generation unit 1 is producedRaw light can consider without polarization characteristic, after the first polarizer 251, it is assumed that light is direction of vibration along x-axisDeviation occurs at lens 21 for the first linearly polarized light, the first linearly polarized light, then when by the first quarter-wave plate 231,The phase of 1/4 wavelength is attached, so as to be modulated to right-handed polarized light, this light has been divided into two in the presence of spectroscope 2221Beam, respectively spurious rays and target light.
The light as veiling glare transmitted by the light of the first quarter-wave plate 231 on spectroscope 2221Line.Spurious rays continue to propagate forward through spectroscope 2221, then by the wavelength of 232 affix of the second quarter-wave plate 1/4Phase, be modulated to linearly polarized light, polarization direction is along x-axis.Due to the printing opacity direction of principal axis and the first polarizer of the second polarizer 241251 is vertical, is that along the y-axis direction, so spurious rays can not pass through the second polarizer 241, human eye is not it is observed that this light.Therefore, this Optical devices can prevent spurious rays from passing through, and target light is normally passed through, and realize the mesh screened to light's.
By the light of the first quarter-wave plate 231 be split mirror 2221 reflection light as target light.Due toReflection is that occur on the interface of optically thinner medium to optically denser medium, so target light can add π phase difference, it is incidentBecome after right-handed polarized light reflection for left-hand polarization light.The left-hand polarization light passes through the first quarter-wave plate 231, is attachedThe phase of 1/4 wavelength, is modulated to second linearly polarized light of the polarization direction along y-axis, and then the second linearly polarized light is passed through in lens 21Certain deviation is crossed, is reflected by the one side 2212 for being coated with polarization beam splitter of lens 21 towards image generation unit 1, now anti-Generation is penetrated on the interface of optically denser medium to optically thinner medium, without additive phase.Then target light third time passes through the one or four/ mono- wave plate 231, is modulated to the second left-hand polarization light.The second left-hand polarization light propagates across forward spectroscope 2221 afterwardsLinearly polarized light of the polarization direction along y-axis, this polarization state and the second polarizer 241 are modulated to the second quarter-wave plate 232Printing opacity direction be consistent, can normally outgoing, received by human eye.
First polarizer 251 and the second polarizer 241 of the present embodiment are linear polarizer and the He of the first polarizer 251The printing opacity direction of principal axis of second polarizer 241 is vertical, so as to realize the selectivity to the light of transmission.
The angle of the printing opacity direction of principal axis of the fast axle of first quarter-wave plate 231 and the first polarizer 251 is 45 °.SecondThe fast axle of quarter-wave plate 232 is vertical with the fast axle of the first quarter-wave plate 231, i.e. the second quarter-wave plate 231Fast axle is -45 ° with the light transmission shaft angular separation of the first polarizer 251.Light is carried out instead in addition, spectroscope 2221 is primarily servedPenetrate and transmission effect, do not change polarization of light state.So as to by setting the first polarizer 251, the first quarter-wave plate231st, the second quarter-wave plate 232 and the second polarizer 241 realize the transmission to specific light.
In the present embodiment, the first polarizer 251, the first quarter-wave plate 231, spectroscope the 2221, the 2nd 4/One wave plate 232 and the second polarizer 241 can be planar structure, or curved-surface structure, require to carry out according to specific displaySpecific design.
By the first polarizer 251, lens 21, the first quarter-wave plate 231, spectroscope 2221, the second quarter-waveThe polarizer 241 of piece 232 and second is attached successively forms contact lenses.
Contact lenses formula optical system of the present utility model is further described below by design parameter.
Optical system as shown in Figure 1, the angle of visual field is 90 °, and emergent pupil size is 15mm, and emergent pupil is away from for 15mm, and overall length (is includedEmergent pupil away from) be about 40mm, image height is about 40mm.The preceding surface of lens 13 is sphere, and radius of curvature is 115.165mm；ThoroughlyThe rear surface of mirror 13 is even aspheric surface, and radius of curvature is -135.322mm, and Conic coefficients are 4.749, and lens center thickness is10mm, material is PMMA.First polarizer 11, polarization spectro piece 12, the first quarter-wave plate 14, spectroscope the 15, the 2nd 4/ mono- wave plate 16 and the laminating of the second polarizer 17 are placed.Because the volume of head-mounted display of the present utility model is less than existingThe volume of head-mounted display, is worn so frame eyeglasses form can be made, lightweight, is convenient for carrying, and wear comfort is high.
The image quality evaluation result of contact lenses formula optical system is as shown in Figure 4 and Figure 5 in the present embodiment.As can be known from Fig. 4,The disc of confusion radius of the peripheral field of optical system is about 100 μm in the present embodiment, the disc of confusion radius ratio of non-edge visual field compared withIt is moderate.As can be known from Fig. 5, the distortion of the peripheral field of optical system is 25% in the present embodiment, although distortion is excessive, to instituteThe image for stating the display of image generation unit 1 is carried out after predistortion correction process, and image seen by person is substantially undistorted.
Fig. 6 is the overall structure figure of the head-mounted display described in the utility model one embodiment.As shown in fig. 6, imageAlthough generation unit 1 is an entirety, left and right two parts are divided into, the first contact lenses corresponded respectively in left and right eyeFormula optical system 2A and the second contact lenses formula optical system 2B, the first contact lenses formula optical system 2A and the second contact lensesFormula optical system 2B is contact lenses formula optical system described in the utility model.Two parts that image generation unit 1 is shownImage carries certain parallax.
Fig. 7 is the overall structure figure of the head-mounted display described in the utility model another embodiment.As shown in fig. 7, figurePicture generation unit 1 includes left and right two displays 1A and 1B, and it is left that left and right two display 1A and 1B are separately fixed at frameOn the position of right eyeglass, the first contact lenses formula optical system 2A and the second contact lenses formula corresponded respectively in left and right eyeOptical system 2B, the first contact lenses formula optical system 2A and the second contact lenses formula optical system 2B are the utility model instituteThe contact lenses formula optical system stated.Left and right two the display 1A and 1B of image generation unit 1 shows corresponding with parallaxImage.
The different display portion 1A in the left and right of image generation unit 1 and 1B show image is with parallax and left and right is differentDisplay portion 1A it is different with the direction of vibration that 1B sends light, contact lenses formula optical system 2 receive simultaneously from image generationThe left and right of unit 1 different display portion 1A and 1B image optical information, contact lenses formula optical system 2 or so eyeglass 2A and 2BOn polarization filter 24 polarizing axis it is parallel with the direction of vibration of the polarised light of corresponding display portion respectively, therefore correspondence is aobviousShow the image optical information of part by corresponding eyeglass and stopped by another eyeglass, prevent picture crosstalk.
Obviously, those skilled in the art can carry out various changes and modification without departing from this practicality to the utility modelNew spirit and scope.So, if it is of the present utility model these modification and modification belong to the utility model claim andWithin the scope of its equivalent technologies, then the utility model is also intended to comprising including these changes and modification.