CN107976820A - Polarization modulating arrangement, method and the stereoscopic image showing system of stereoprojection light - Google Patents

Polarization modulating arrangement, method and the stereoscopic image showing system of stereoprojection light Download PDF

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Publication number
CN107976820A
CN107976820A CN201711172785.0A CN201711172785A CN107976820A CN 107976820 A CN107976820 A CN 107976820A CN 201711172785 A CN201711172785 A CN 201711172785A CN 107976820 A CN107976820 A CN 107976820A
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CN
China
Prior art keywords
polarization
light beam
reflected beams
transmitted light
polarization state
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CN201711172785.0A
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Chinese (zh)
Inventor
周永业
邓树端
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Shenzhen Shidai Huaying Technology Co Ltd
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Shenzhen Shidai Huaying Technology Co Ltd
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Priority to CN201711172785.0A priority Critical patent/CN107976820A/en
Publication of CN107976820A publication Critical patent/CN107976820A/en
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
    • G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
    • G02B30/22—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the stereoscopic type
    • G02B30/25—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the stereoscopic type using polarisation techniques
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/28—Reflectors in projection beam
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141—Constructional details thereof
    • H04N9/315—Modulator illumination systems
    • H04N9/3167—Modulator illumination systems for polarizing the light beam

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)

Abstract

The present invention is suitable for projection display technique field, there is provided a kind of polarization modulating arrangement of stereoprojection light, including：Polarization beam splitting assembly, for being two transmitted light beams and two the reflected beams by the projected light beam beam splitting for carrying image information, wherein, the polarization states of two transmitted light beams is different, the polarization state of two the reflected beams is also different；First optical path direction adjusts component, for adjusting the direction of propagation of the first the reflected beams；Second optical path direction adjusts component, for adjusting the direction of propagation of the second the reflected beams；Polarization converted component, for the part or all of progress polarization state modulation in two transmitted light beams and two the reflected beams, modulating latter two transmitted light beam and two the reflected beams to have identical polarization state.Compared with the polarization spectro mode of double light path, the present invention can effectively reduce the reflected beams and the optical path difference of transmitted light beam, so that the volume of whole device is substantially reduced.

Description

Polarization modulating arrangement, method and the stereoscopic image showing system of stereoprojection light
Technical field
The invention belongs to projection display technique field, more particularly to a kind of polarization modulating arrangement of stereoprojection light, method And stereoscopic image showing system.
Background technology
The viewing principle of stereopsis, is to receive the right and left eyes video figure played according to frame sequential respectively by the right and left eyes of people Picture, then synthesized right and left eyes video image by brain, produce stereoeffect.
The technology that current right and left eyes receive image mainly has left and right polarization spectro mode, the left and right shutter release method of synchronization With the red blue spectroscopic modes in left and right etc., wherein, the use of left and right polarization spectro mode is more extensive.In left and right polarization spectro mode In, successively generate monochromatic light road polarization spectro technology and double light path polarization spectro technology according to technology development track.
A kind of principle of typical monochromatic light road polarization spectro is as shown in Figure 1, projector 11 projects successively according to frame sequential Carry the projected light beam of left-eye image and carry the projected light beam of eye image, projected light beam is polarized by polarizer 12 And be converted to linearly polarized light, then by light polarization modulator 13 according to frame sequential modulate left circularly polarized light and right-circularly polarized light, And curtain 15 is projected to, the right and left eyes of spectators receive the left-handed circle reflected by curtain 15 by the rotatory polarization glasses 16 of wearing respectively Polarised light and right-circularly polarized light, wherein synchronous circuit 14 are used to control projector 11 and light polarization modulator 13 to work asynchronously.But It is due to that polarizer 12 is absorption-type, only part light energy is polarized during being polarized and has given up another part luminous energy Amount so that substantial amounts of light energy is converted into heat on polarizer 12, when using the cinematic movie projector of high brightness, polarizer 12 Temperature can rise rapidly so that the aging speed of polarizer 12 is accelerated, and optical property is substantially deteriorated, and strong beam can will when serious Polarizer 12 is burnt.Therefore monochromatic light road polarization spectro was substituted by double light path polarization spectro later.
The principle of double light path polarization spectro mode is as shown in Fig. 2, be based primarily upon the Amici prism realization of a ramp type, this point Light prism has a polarization beam splitter 2 being obliquely installed, and the projected light beam from projector is transmission by polarization beam splitter beam splitting P polarization light and reflection S-polarization light, P polarization light is then converted into S-polarization light again or S-polarization light is converted into P polarization Light, finally unifies two-beam being modulated to left circularly polarized light or right-circularly polarized light according to frame sequential again.Since projected light exists It is fully utilized during being polarized, also improves the utilization rate of projection ray and the brightness of projected picture.
But can be larger using the modulating system size of double light path polarization spectro, required optics is also larger, in device There are many difficulties when processing is with assembling.
The content of the invention
Technical problem to be solved of the embodiment of the present invention is the existing three-dimensional throwing based on double light path polarization spectro technology Shadow polarizes the bulky problem of optic modulating device, it is desirable to provide a kind of Polarization Modulation of the brand-new stereoprojection light of small volume Device.
In order to solve the above technical problems, the embodiment of the present invention is achieved in that a kind of Polarization Modulation of stereoprojection light Device, including：
Polarization beam splitting assembly, the projected light beam beam splitting for will carry image information are first with the first polarization state Transmitted light beam, the second transmitted light beam with the second polarization state, the first the reflected beams with the second polarization state and with first Second the reflected beams of polarization state；Wherein, where the first transmitted light beam and the second transmitted light beam gone out by beam splitting to imaging surface Direction propagate, and image space of first transmitted light beam with first the reflected beams on imaging surface is identical, institute It is identical to state image space of second transmitted light beam with second the reflected beams on imaging surface；
First optical path direction adjusts component, for adjusting the direction of propagation of first the reflected beams so that described first The reflected beams are propagated to the direction where imaging surface；
Second optical path direction adjusts component, for adjusting the direction of propagation of second the reflected beams so that described second The reflected beams are propagated to the direction where imaging surface；
Polarization state modulation component, for first transmitted light beam, second transmitted light beam, first reflected light Part or all of in beam and second the reflected beams carries out polarization state modulation, so that first transmitted light beam, described the Two transmitted light beams, first the reflected beams and second the reflected beams have identical polarization state.
The embodiment of the present invention additionally provides a kind of stereoscopic image showing system, including：
Projector, the projected light beam of left-eye images information is carried for being projected successively with frame sequential and carries right eye The projected light beam of image information；
The polarization modulating arrangement of stereoprojection light as described above；
Curtain, for each projection with identical polarization state modulated for the polarization modulating arrangement of the stereoprojection light Light beam is imaged, and imaging is reflexed to the 3D glasses of user's wearing.
The embodiment of the present invention additionally provides a kind of polarization modulation method of stereoprojection light, and the described method includes following steps Suddenly：
By the projected light beam beam splitting for carrying image information for the first transmitted light beam with the first polarization state, with second Second transmitted light beam of polarization state, the first the reflected beams with the second polarization state and the second reflected light with the first polarization state Beam；Wherein, the first transmitted light beam and the second transmitted light beam gone out by beam splitting is propagated to the direction where imaging surface, and described the Image space of one transmitted light beam with first the reflected beams on imaging surface is identical, second transmitted light beam with it is described Image space of second the reflected beams on imaging surface is identical；
Adjust the direction of propagation of the first the reflected beams and the second the reflected beams so that the first the reflected beams and the second reflected light Beam is propagated to the direction where imaging surface；
To in the first transmitted light beam, the second transmitted light beam, the first the reflected beams, the second the reflected beams it is part or all of into Row polarization state is modulated so that the first transmitted light beam, the second transmitted light beam, the first the reflected beams, the second the reflected beams have identical Polarization state.
Compared with prior art, beneficial effect is the embodiment of the present invention：The cubic light that the embodiment of the present invention is provided Projected light beam is divided into the four bundles light comprising two transmissions, two reflections by projection polarization modulating device using polarization spectro component, wherein The polarization state of two transmitted light beams is different, the polarization state of two the reflected beams is also different, and due to corresponding to a secondary complete image picture Light beam be divided into two the reflected beams when being polarized, with a transmitted light beam, the double light path polarization spectro of the reflected beams Mode is compared, and the embodiment of the present invention effectively reduces the reflected beams and the optical path difference of transmitted light beam so that follow-up optical path direction Adjustment component, optical path compensation component can select the size of smaller, so that whole device volume is substantially reduced.
Brief description of the drawings
Fig. 1 is the principle schematic that the stereoscopic image showing system that the prior art provides uses monochromatic light road polarization spectro；
Fig. 2 is the principle schematic that the stereoscopic image showing system that the prior art provides uses double light path polarization spectro；
Fig. 3 is the structure principle chart of the polarization modulating arrangement for the stereoprojection light that first embodiment of the invention provides；
Fig. 4 is the structure principle chart of the polarization modulating arrangement for the stereoprojection light that second embodiment of the invention provides；
Fig. 5 is the structure principle chart of the polarization beam splitting assembly for the prism group structure type that second embodiment of the invention provides；
Fig. 6 A and Fig. 6 B are the wiregrating knot of the polarization spectro layer on the first substrate that second embodiment of the invention provides respectively Structure schematic diagram；
Fig. 7 A and Fig. 7 B are the wiregrating knot of the polarization spectro layer on the second substrate that second embodiment of the invention provides respectively Structure schematic diagram；
Fig. 8 and Fig. 9 be respectively second embodiment of the invention provide prism group structure type polarization beam splitting assembly in two The wire grid construction schematic diagram of a polarization spectro layer；
Figure 10 is light path schematic diagram of two transmitted light beams there are mixed polarized region of second embodiment of the invention offer；
Figure 11 is the structure principle chart of the polarization modulating arrangement for the stereoprojection light that third embodiment of the invention provides；
Figure 12 is the structure principle chart of the polarization beam splitting assembly for the prism group structure type that third embodiment of the invention provides；
Figure 13 is the structure principle chart of the polarization modulating arrangement for the stereoprojection light that fourth embodiment of the invention provides；
Figure 14 is the structure principle chart of the polarization beam splitting assembly for the prism group structure type that fourth embodiment of the invention provides；
Figure 15 is light path schematic diagram of two transmitted light beams there are mixed polarized region of fourth embodiment of the invention offer；
Figure 16 is the structure principle chart of the polarization beam splitting assembly for the prism group structure type that fifth embodiment of the invention provides；
Figure 17 is the structure principle chart of the polarization beam splitting assembly for the prism group structure type that fifth embodiment of the invention provides.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, it is right The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and It is not used in the restriction present invention.
Different from traditional double light path polarization spectro mode by projected light beam be divided into a transmitted light beam, a reflected beams think of Projected light beam is divided into the four bundles light comprising two transmissions, two reflections by road, the embodiment of the present invention.
Based on this principle, as shown in figure 3, first embodiment of the invention provides a kind of Polarization Modulation dress of stereoprojection light Put, including：Polarization beam splitting assembly 31, the first optical path direction adjustment component 32, the second optical path direction adjustment component 33 and polarization state Modulation component 34, the function introduction of each component are as follows：
It is with the first polarization state that polarization beam splitting assembly 31-----, which is used for the projected light beam beam splitting for carrying image information, The first transmitted light beam, the second transmitted light beam with the second polarization state, the first the reflected beams and tool with the second polarization state There are the second the reflected beams of the first polarization state.
The polarization modulating arrangement 31 for the stereoprojection light that the embodiment of the present invention is provided be positioned over when in use projector with Between imaging surface (i.e. curtain), the projected light beam for being projected to projector carries out optical effect, projected light beam is existed Before being projected to imaging surface there is polarization state, the imaging surfaces such as unified linear polarization or circular polarization there will be polarization state again Projected light beam reflex to spectators wearing 3D glasses in, wherein, imaging surface need to have polarization property, i.e., imaging surface is anti- The polarization state of projected light beam cannot be changed during penetrating projected light beam, generally use metal curtain is realized.
First, projector's alternating projection goes out to carry the projected light beam of left-eye images information and carries right-eye image information Projected light beam, such as can be projected in a manner of frame sequential, similar to playing video, the T1 moment, which project, to be carried left-eye images and believe The projected light beam of breath, the T2 moment projects the projected light beam for carrying right-eye image information, the T3 moment projects carry left-eye images letter again The projected light beam of breath, T4 moment project the projected light beam ... ... for carrying right-eye image information again, and so on.Will from hardware Projection function is asked to support video playing of the frame rate for 100HZ or higher frame rate, can be using on digital micro-mirror formula projector, silicon Liquid crystal projector etc..
Then, polarization beam splitting, in the embodiment of the present invention, polarization beam splitting group are carried out to projected light beam by polarization beam splitting assembly 31 Projected light beam is divided into four bundles light, i.e. the first transmitted light beam, the first the reflected beams, the second transmitted light beam, the second reflected light by part 31 Beam.Wherein, the first transmitted light beam it is identical with the image information that the first the reflected beams carry and on imaging surface into image position Put identical, correspondingly, the second transmitted light beam is identical with the image information that the second the reflected beams carry and on imaging surface Image space is identical.
The first transmitted light beam that beam splitting goes out is with the first polarization state, the first the reflected beams with the second polarization state, second saturating Irradiating light beam with the second polarization state, the second the reflected beams with the first polarization state, wherein, the first transmitted light beam and the second transmitted light Beam directly to where imaging surface direction propagate, and the first the reflected beams due to by reflection cause the direction of propagation can with it is corresponding The first transmitted light beam the direction of propagation it is vertical, similarly, the second the reflected beams by by reflection cause the direction of propagation can with pair The direction of propagation for the second transmitted light beam answered is vertical, it is therefore desirable to adjusts the propagation side of the first the reflected beams and the second the reflected beams To so that the first the reflected beams and the second the reflected beams can be propagated to the direction where imaging surface.
It is emphasized that since the first transmitted light beam and the second transmitted light beam are all directly to imaging surface after beam splitting The direction at place is propagated, and therefore, macroscopic view looks like a whole Shu Guang, but since the polarization state of the two is different, substantially It will be appreciated that it is the different light beam of two beams for this.In addition, it schematically show only the first transmitted light beam and second in Fig. 3 The propagation path of transmitted light beam, actually since the projected light beam that projector goes out is diverging, which is passing through The first transmitted light beam and the second transmitted light beam obtained after 31 beam splitting of polarization beam splitting assembly is still diverging so that first is saturating Irradiating light beam and the second transmitted light beam can overlap in the imaging region of imaging surface.
Above-mentioned first polarization state and the second polarization state are linear polarization and the polarization direction of the two is orthogonal, such as one is P polarization light, another be S-polarization light, can be specifically the first polarization state be P polarization light, the second polarization state be S-polarization light, or The first polarization state of person is S-polarization light, the second polarization state is P polarization light.
Polarization beam splitting assembly 31 can be polarized using polarization beam splitter to be split, and optics wiregrating can also be used to carry out Beam splitting is polarized, or is split and is polarized using polarization beam splitter and optics wire grid construction at the same time, for example with polarization beam splitter Beam splitting goes out the first transmitted light beam and the first the reflected beams, goes out the second transmitted light beam and the second reflection using optics wire grid construction beam splitting Light beam.
First optical path direction adjustment component 32----- is used for the direction of propagation for adjusting the first the reflected beams so that first is anti- Irradiating light beam is propagated to the direction where imaging surface.
First optical path direction adjustment component 32 adjustment direction can make the first the reflected beams finally imaging surface into Image position is overlapping with the image space of the first transmitted light beam, when it is implemented, the first optical path direction can be adjusted component 32 Adjustment direction is arranged to adjustable, in favor of adjusting image space of first the reflected beams in imaging surface, can usually use flat The device that face mirror, the curved mirror that can be enlarged or reduce to beam size etc. have reflection function is realized, it is of course also possible to adopt With lens etc. there is the optics for changing optical path direction to realize.
Second optical path direction adjustment component 33----- is used for the direction of propagation for adjusting the second the reflected beams so that second is anti- Irradiating light beam is propagated to the direction where imaging surface.
Similarly, the adjustment direction of the second optical path direction adjustment component 33 can make the second the reflected beams finally in imaging surface Image space it is overlapping with the image space of the second transmitted light beam, when it is implemented, can by the second optical path direction adjust component Adjustment direction be arranged to adjustable, so that the second the reflected beams 33 of adjustment are in the image space of imaging surface, can usually adopt The device for having reflection function with plane mirror, the curved mirror that can be enlarged or reduce to beam size etc. is realized, certainly, also may be used Using lens etc. there is the optics for changing optical path direction to realize.
Polarization state modulation component 34----- is used for the first transmitted light beam, the second transmitted light beam, the first the reflected beams and the Part or all of progress polarization state modulation in two the reflected beams, so that the first transmitted light beam, the second transmitted light beam, the first reflection Light beam and the second the reflected beams have identical polarization state.
Four bundles light is sequentially modulated to be only capable of the polarization state received by left eye by polarization state modulation component 34 according to frame sequential With the polarization state for being only capable of being received by right eye, for example, present frame by four bundles light be modulated to can by left eye receive and cannot be right The polarization state that eye receives, in the polarization state that four bundles light is modulated to be received and can be received by right eye by left eye by next frame.
But in any frame, the polarization state of four bundles light needs to be modulated to consistent, tool before imaging surface is reached When body is modulated, can a modulating part light beam polarization state, for example, either playing the corresponding picture frame of left-eye images still The corresponding picture frame of right-eye image, polarization state modulation component 34 is all only by the first transmitted light beam and the polarization state of the second the reflected beams It is the second polarization state from the first polarization converted, such four bundles light is respectively provided with the second polarization state, or polarization state modulation component 34 All only by the polarization state of the second transmitted light beam and the first the reflected beams from the second polarization converted be the first polarization state, such four beam Light is respectively provided with the first polarization state；It can also be that four bundles light is involved in the modulated process of polarization state, for example, playing left-eye images pair During the picture frame answered, polarization state modulation component 34 is by the polarization state of the first transmitted light beam and the second the reflected beams from the first polarization state The second polarization state is converted to, such four bundles light is respectively provided with the second polarization state, and in the corresponding picture frame of broadcasting right-eye image, partially Polarization state modulation component 34 polarizes the polarization state of the second transmitted light beam and the first the reflected beams from the second polarization converted for first State, such four bundles light are respectively provided with the first polarization state.
As described above, the polarization state of the four bundles light gone out by above-mentioned 31 beam splitting of polarization beam splitting assembly is linear P polarization or S Polarization, then, if spectators' wearing is line polarisation glasses, four bundles light need to be only modulated to by polarization state modulation component in each frame For P polarization or be modulated to be S-polarization, and if spectators wear be rotatory polarization glasses, it is also necessary to be further modulated to a left side Rounding polarised light and right-circularly polarized light.When needing to be modulated to circularly polarized light, polarization state modulation component 34 need to include：Polarization state Converting unit and optical modulator.
Wherein, polarization converted unit is needed in each frame, and four bundles light is modulated to have unified linear polarization, base In principles described above, polarization converted unit has two kinds of operating modes：
Pattern one：Polarization converted unit is used for the polarization state of the first transmitted light beam and the second the reflected beams is inclined from first Polarization state is converted to the second polarization state, so that the first transmitted light beam, the second transmitted light beam, the first the reflected beams and the second the reflected beams It is the second polarization state；Alternatively, for by the polarization state of the second transmitted light beam and first the reflected beams from the second polarization state Be converted to the first polarization state so that first transmitted light beam, second transmitted light beam, first the reflected beams and described Second the reflected beams are the first polarization state.
Pattern two：Polarization converted unit is used in the corresponding picture frame of broadcasting left-eye images, by the first transmitted light beam With the polarization states of the second the reflected beams from the first polarization converted be the second polarization state so that four bundles light is respectively provided with the second polarization State, and when playing the corresponding picture frame of right-eye image, by the polarization state of the second transmitted light beam and the first the reflected beams from second Polarization converted is the first polarization state so that four bundles light is respectively provided with the first polarization state.
Then, then by optical modulator the first transmitted light beam with the first polarization state or the second polarization state, second will be unified Transmitted light beam, the first the reflected beams and the second the reflected beams are modulated to left circularly polarized light and right-hand circular polarization according to frame sequential Light.
Wherein, when polarization converted cell operation realizes that half-wave plate can incite somebody to action in above-mentioned pattern a period of time, optional half-wave plate P polarization light is converted to S-polarization light or S-polarization light is converted to P polarization light, naturally it is also possible to selects other to revolve linear polarization The device turning 90 degrees is realized, such as TN liquid crystal cells etc.., can be every when polarization converted cell operation is in above-mentioned pattern two The light path of Shu Guang respectively selects 1 and can realize the device that polarization state is rotated by 90 °, such as TN liquid crystal cells etc., only need to control four bundles light The work of corresponding TN liquid crystal cells, needs to control two of which TN liquid crystal cells to rotate the polarization direction of linearly polarized light per two field picture 90 degree and two other is in working status without spin.
Above-mentioned optical modulator can be selected the device with quarter-wave delay feature and realize, such as liquid crystal device or four / mono- wave plate, can be that four bundles light road shares an optical modulator, can also set one respectively in the light path of four bundles light Optical modulator.
In conclusion in the first embodiment, since the projected light beam corresponding to a secondary complete image picture is when being polarized Two the reflected beams are divided into by polarization beam splitting assembly 31, effectively reduce the reflected beams and the optical path difference of transmitted light beam so that after Continuous optical path direction adjustment component, optical path compensation component can select the size of smaller, so that the volume of whole device is significantly Reduce.
The structure of polarization beam splitting assembly 31, polarization converted unit in first embodiment of the invention, position can have more Kind design method, as long as can meet above-mentioned optical function, hereafter continues to enumerate some embodiments to explain, illustrate. It should be appreciated that when it is implemented, those skilled in the art can also flexibly change dissolves as needed on the basis of the present invention Other various embodiments.
Fig. 4 shows the polarization modulating arrangement of the stereoprojection light of second embodiment of the invention, this embodiment is suitable for seeing Crowd wears the situation of rotatory polarization glasses.
In the present embodiment, the first polarization state and the second polarization state of the light beam that the beam splitting of polarization beam splitting assembly institute goes out are that line is inclined Shake, and the polarization direction of the two is orthogonal, such as the first polarization state and the second polarization state are respectively linear P polarization and S-polarization.Partially The beam splitting component that shakes includes first substrate 3111 and second substrate 3112, and two substrates are connected to each other and are in the shape of the letter V, the position being connected Put formed with ridge A1, the protrusion direction of ridge A1 and the direction of propagation contrary of projected light beam, the i.e. protrusion direction of ridge A1 are directed towards Direction where projector.When specifically used, preferably ridge A1 is positioned on the center line of projected light beam.First substrate 3111 With polarization spectro layer is equipped with second substrate 3112, and the polarization spectro layer transmissive of first substrate 3111 goes out the first transmission Light beam and reflect the first the reflected beams, the polarization spectro layer transmissive of second substrate 3112 goes out the second transmitted light beam and reflects Second the reflected beams.In Fig. 4, light beam where "●" represents is linear polarization and polarization direction perpendicular to paper,Represent Place light beam is linear polarization and polarization direction is parallel to paper, and light beam where "○" then represents is circular polarization state.
As a kind of change structure of second embodiment, polarization beam splitting assembly is also designed to polarization splitting prism group Structure.As shown in figure 5, the polarization splitting prism group is by least the first prism 3121, the second prism 3122 and prism 3123 Three isosceles right-angle prisms are bonded to be formed, and are in integrally rectangular parallelepiped structure after fitting, and three isosceles right-angle prisms use transparent base Material is made.Two right-angle sides of prism 3123 respectively with the bevel edge of the first prism 3121 and the bevel edge phase of the second prism 3122 Fitting, joint place has the first polarization spectro layer 3124 and the second polarization spectro layer 3125, the first polarization spectro layer 3124 respectively Vertical with the second polarization spectro layer 3125 and be connected to each other and be in the shape of the letter V, formed with ridge A2, ridge A2's is convex for the position being connected The direction of propagation contrary of outgoing direction and projected light beam, and 3124 transmissive of the first polarization spectro layer therein goes out the first transmitted light Beam and reflect the first the reflected beams, 3125 transmissive of the second polarization spectro layer goes out the second transmitted light beam and reflects the second reflection Light beam.In above-mentioned polarization splitting prism group, the face where ridge A2 is the plane of incidence of projected light beam, when specifically used, preferably will Ridge A2 is positioned on the center line of projected light beam.
Referring to Fig. 4, the first optical path direction in the present embodiment is adjusted in the function and first embodiment of component 321 The first optical path direction adjustment component 32 function it is identical, the function of the second optical path direction in the present embodiment adjustment component 331 It is identical with the function of the first optical path direction adjustment component 33 in first embodiment, specifically repeat no more.Polarization state modulation component Including：First polarization form converter 3411, the second polarization form converter 3412 and optical modulator 3413.Wherein, the first polarization state Converter 3411 is located in the light path where the first the reflected beams, for by the polarization state of the first the reflected beams from the second polarization state Be converted to the first polarization state；Second polarization form converter 3412 is located in the light path where the second transmitted light beam, for by second The polarization state of transmitted light beam from the second polarization converted be the first polarization state.It should be appreciated that can also be by first during specific implementation 3411 and second polarization form converter 3412 of polarization form converter is placed into the light path where two other light beam, for example, will First polarization form converter 3411 is located in the light path where the second the reflected beams, for by the polarization state of the second the reflected beams from First polarization converted is the second polarization state；And the second polarization form converter 3412 is located to the light path where the first transmitted light beam On, for by the polarization state of the first transmitted light beam from the first polarization converted be the second polarization state.
In the first polarization form converter 3411 and the second polarization form converter 3412 each by the polarization state tune of place light beam It is whole for it is consistent and then by optical modulator 3413 by unified the first transmitted light beam with the first polarization state or the second polarization state, Second transmitted light beam, the first the reflected beams and the second the reflected beams are modulated to left circularly polarized light according to frame sequential and dextrorotation is justified partially Shake light, for example, in present frame, each light beam is adjusted to left circularly polarized light by optical modulator 3413, so that the circle that spectators wear is inclined The left eyeglass of optical glasses can pass through the left circularly polarized light and right eyeglass cannot then pass through the left circularly polarized light；In next frame, Each light beam is adjusted to right-circularly polarized light by optical modulator 3413, so that the right eyeglass for the rotatory polarization glasses that spectators wear can pass through The right-circularly polarized light and left eyeglass cannot then pass through the right-circularly polarized light.
Wherein, half-wave plate realization, half-wave can be selected in the first polarization form converter 3411 and the second polarization form converter 3412 P polarization light can be converted to S-polarization light by piece or S-polarization light is converted to P polarization light, naturally it is also possible to which selection can be by linear polarization TN liquid crystal cells being rotated by 90 ° etc..Above-mentioned optical modulator can be selected the device with quarter-wave delay feature and realize, example Can be that four bundles light road shares an optical modulator such as liquid crystal device or quarter-wave plate, can also be in the light path of four bundles light It is upper that an optical modulator is set respectively.
In second embodiment, the polarization spectro layer either in the polarization beam splitting assembly of tabular, or prism group structure Polarization spectro layer in polarization beam splitting assembly, all realizes polarization spectro using wire grid construction, wherein, beam splitting goes out the first transmitted light Each grid arrangement direction of the wiregrating part of beam and the first the reflected beams, goes out the second transmitted light beam and the second the reflected beams with beam splitting Wiregrating part each grid arrangement direction it is mutually orthogonal.
Specifically, for the polarization spectro layer in the polarization beam splitting assembly of tabular, Fig. 6 A and Fig. 6 B are first substrate 3111 Wire grid construction on upper polarization spectro layer, wherein Fig. 6 A are the plan of wire grid construction, and Fig. 6 B are that the section of wire grid construction is illustrated Figure, "●" represent the direction of wiregrating perpendicular to paper.Fig. 7 A and Fig. 7 B are the wiregrating on polarization spectro layer on second substrate 3112 Structure, wherein Fig. 7 A are the plan of wire grid construction, and Fig. 7 B are the section schematic diagram of wire grid construction,Represent the direction of wiregrating Parallel to paper.As can be seen that in 3111 polarization spectro layer of first substrate wiregrating orientation, polarized with second substrate 3112 The orientation of wiregrating is orthogonal in beam splitter layer.
And for using the polarization spectro layer in the polarization beam splitting assembly of prism group structure, Fig. 8 and Fig. 9 respectively illustrate the The wire grid construction in wire grid construction and the second polarization spectro layer 3125 on one polarization spectro layer 3124, it can be seen that each in Fig. 8 Wiregrating vertically arranges, as the projected light beam R of no polarizationRandomlyThe wiregrating knot being incident on the first polarization spectro layer 3124 During structure, can beam splitting go out the S linearly polarized lights R of transmissionsWith the P linearly polarized lights R of reflectionp；And each wiregrating arranges in the horizontal direction in Fig. 9, As the projected light beam R of no polarizationRandomlyDuring the wire grid construction being incident on the second polarization spectro layer 3125, can beam splitting go out reflection S linearly polarized lights RsWith the P linearly polarized lights R of transmissionp。
In conclusion in a second embodiment, the projected light beam corresponding to a secondary complete image picture is when being polarized by two Polarization spectro layer on a substrate is divided into two the reflected beams, or is divided into two by two polarization spectro layers inside prism group The reflected beams, effectively reduce the reflected beams and the optical path difference of transmitted light beam so that follow-up optical path direction adjusts component, light path Compensation component can select the size of smaller, so that whole device volume is substantially reduced, also, this " V " shape structure is inclined Beam splitting component shake compared with the Amici prism of the ramp type of double light path, can accomplish thinner, the similar half of thickness reduction.
Further, it is contemplated that projected light beam is not by strictly when by polarization beam splitting assembly in second embodiment It is divided into two parts non-cross up and down, understands some actually by the light beam of polarization beam splitting assembly top half and go to down Face, conversely, by the light beam of polarization beam splitting assembly the latter half also can some go to above, so in imaging surface Centre region is really that the light beam of two kinds of polarization states mixes, as shown in Figure 10, wherein " chain-dotted line " represents the upper of projected light beam Half part, " long short-term " represent the latter half of projected light beam, it can be seen that transmitted through after polarization beam splitting assembly, projection The top half of light beam and the latter half have a Mixed Zone, which there are the transmitted light of two kinds of polarization states, So follow-up polarization state modulation component can be difficult when the projected light beam to the Mixed Zone carries out polarization state consistency adjustment. To solve this technical problem, third embodiment of the invention provides the polarization modulating arrangement of the stereoprojection light shown in Figure 11, this Embodiment is suitable for the situation that spectators wear rotatory polarization glasses.
1 is please referred to Fig.1, unlike second embodiment, the second polarization form converter 3412 is placed in the present embodiment Second polarization form converter 3412 is attached at the table that 3112 transmissive of second substrate goes out the second transmitted light beam by position, the present embodiment On face, so equivalent to the second transmitted light beam with the first transmitted light beam mix before, just by the second transmitted light beam Polarization state is converted, figure 10 illustrates Mixed Zone in light beam polarization state it is consistent.It should be appreciated that When it is implemented, if the first polarization form converter 3411 is located in the light path where the second the reflected beams, then need second inclined Polarization state converter 3412 is attached at 3111 transmissive of first substrate and goes out on the surface of the first transmitted light.
, can be by the second polarization converted for the polarization beam splitting assembly of the prism structure form shown in second embodiment Device 3412 is packaged in the polarization splitting prism group, and goes out the second transmitted light beam positioned at 3125 transmissive of the second polarization spectro layer Side, as shown in figure 12.Can be saturating it is of course also possible to which the second polarization form converter 3412 is packaged in the first polarization spectro layer 3124 Project the side of the first transmitted light beam.
3rd embodiment remainder is identical with second embodiment, repeats no more.
In conclusion in the third embodiment, the projected light beam corresponding to a secondary complete image picture is not only when being polarized It is divided into two the reflected beams by the polarization spectro layer on two substrates or by two polarization spectro layers inside prism group, and In the second transmitted light beam before being mixed with the first transmitted light beam, just the polarization state of the second transmitted light is converted, Therefore, while effectively reducing the optical path difference of the reflected beams and transmitted light beam, being substantially reduced whole device volume, also more have Beneficial to modulation of the follow-up polarization Light modulation element to the polarization state of two transmitted light beams, equally, the " V " shape knot in the present embodiment The polarization beam splitting assembly of structure can also accomplish thinner compared with the Amici prism of the ramp type of double light path, and thickness reduces similar Half.
Figure 13 shows the polarization modulating arrangement of the stereoprojection light of fourth embodiment of the invention, this embodiment is equally applicable Spectators Yu wear the situation of rotatory polarization glasses.
Please refer to Fig.1 3, in the present embodiment, the first polarization state of the light beam that the beam splitting of polarization beam splitting assembly institute goes out and second inclined Polarization state is linear polarization, and the polarization direction of the two is orthogonal, such as the first polarization state and the second polarization state are respectively linear P inclined Shake and S-polarization.Polarization beam splitting assembly includes first substrate 3211 and second substrate 3212, and two substrates are connected to each other in V words Shape, the position being connected is formed with ridge B1, and the protrusion direction of ridge B1 is identical with the direction of propagation of projected light beam, i.e., ridge B1's is convex Outgoing direction is consistent with the direction of propagation of projected light beam.When specifically used, preferably ridge B1 is positioned on the center line of projected light beam. Polarization spectro layer is equipped with first substrate 3211 and second substrate 3212, and the polarization spectro layer of first substrate 3211 can be saturating Project the first transmitted light beam and reflect the first the reflected beams, the polarization spectro layer transmissive of second substrate 3212 goes out the second transmission Light beam and reflect the second the reflected beams, wherein, by the polarization spectro layer beam splitting of first substrate 3211 go out it is described first reflection Light beam may pass through second substrate 3212 and again be adjusted the direction of propagation to where imaging surface by the second optical path direction adjustment component 332 Direction, may pass through first substrate 3211 again by by the second the reflected beams that the polarization spectro layer beam splitting of second substrate 3212 goes out The direction of propagation is adjusted the direction to where imaging surface by one optical path direction adjustment component 322.In fig. 13, where "●" represents Light beam is linear polarization and polarization direction perpendicular to paper,Light beam where representing for linear polarization and polarization direction parallel to Paper, light beam where "○" then represents is circular polarization state.
As a kind of change structure of fourth embodiment, polarization beam splitting assembly is also designed to polarization splitting prism group Structure.As shown in figure 14, the polarization splitting prism group is by least the first prism 3221, the second prism 3222 and prism 3223 Three isosceles right-angle prisms are bonded to be formed, and are in integrally rectangular parallelepiped structure after fitting, and three isosceles right-angle prisms use transparent base Material is made.Two right-angle sides of prism 3223 respectively with the bevel edge of the first prism 3221 and the bevel edge phase of the second prism 3222 Fitting, joint place has the first polarization spectro layer 3224 and the second polarization spectro layer 3225, the first polarization spectro layer 3224 respectively Vertical with the second polarization spectro layer 3225 and be connected to each other and be in the shape of the letter V, formed with ridge B2, ridge B2's is convex for the position being connected Outgoing direction is consistent with the direction of propagation of projected light beam, and 3224 transmissive of the first polarization spectro layer therein goes out the first transmitted light Beam and reflect the first the reflected beams, 3225 transmissive of the second polarization spectro layer goes out the second transmitted light beam and reflects the second reflection Light beam, wherein, it may pass through the second polarization spectro layer 3225 again by the first the reflected beams that 3224 beam splitting of the first polarization spectro layer goes out The direction of propagation is adjusted into direction to where imaging surface as the second optical path direction adjustment component 332, by the second polarization spectro layer The second the reflected beams that 3225 beam splitting go out may pass through the first polarization spectro layer 3224 again will by the first optical path direction adjustment component 322 The direction of propagation adjusts the direction to where imaging surface.In above-mentioned polarization splitting prism group, the face where ridge B2 is projected light Ridge B2, when specifically used, is preferably positioned on the center line of projected light beam by the plane of incidence of beam.
Referring to Figure 13, the first optical path direction in the present embodiment adjusts the function and first embodiment of component 322 In the first optical path direction adjustment component 32 function it is identical, the work(of the second optical path direction in the present embodiment adjustment component 332 Can be identical with the function of the first optical path direction adjustment component 33 in first embodiment, specifically repeat no more.Polarization state modulation group Part includes：Polarization form converter 3421 and optical modulator 3422.Wherein, polarization form converter 3421 is located at the first reflected light at the same time In light path in light path where beam and where the second transmitted light beam, for by the inclined of the first the reflected beams and the second transmitted light beam Polarization state from the second polarization converted be the first polarization state.It should be appreciated that can also be by polarization form converter 3421 during specific implementation It is arranged at the same time in the light path where the second the reflected beams and the light path where the first transmitted light beam, for second to be reflected The polarization state of light beam and the first transmitted light beam from the first polarization converted be the second polarization state.
The polarization state of place light beam is adjusted to consistent in polarization form converter 3421 and then is incited somebody to action by optical modulator 3422 Unified the first transmitted light beam with the first polarization state or the second polarization state, the second transmitted light beam, the first the reflected beams and second The reflected beams are modulated to left circularly polarized light and right-circularly polarized light according to frame sequential.3422 specific modulation principle of optical modulator It is identical with the modulation principle of light adjuster 3413 in second embodiment, repeat no more.
Wherein, polarization form converter 3421 can equally use half-wave plate or TN liquid crystal cells etc. linear polarization can be rotated 90 The device of degree is realized, is specifically repeated no more.
It is identical with second embodiment, the polarization spectro layer in the polarization beam splitting assembly of the tabular in the present embodiment, or rib Polarization spectro layer in the polarization beam splitting assembly of microscope group structure, all realizes polarization spectro using wire grid construction, wherein, beam splitting goes out Each grid arrangement direction of the wiregrating part of first transmitted light beam and the first the reflected beams, goes out the second transmitted light beam and with beam splitting Each grid arrangement direction of the wiregrating part of two the reflected beams is mutually orthogonal.Specific wire grid construction refers to Fig. 6 A, Fig. 6 B, figure 7A, Fig. 7 B, Fig. 8 and Fig. 9, specifically repeat no more.
In conclusion in the fourth embodiment, the projected light beam corresponding to a secondary complete image picture is divided into two instead Irradiating light beam, effectively reduces the reflected beams and the optical path difference of transmitted light beam so that follow-up optical path direction adjusts component, light path is mended The size of smaller can be selected by repaying component, so that whole device volume is substantially reduced, equally, the " V " shape knot in the present embodiment The polarization beam splitting assembly of structure can also accomplish thinner compared with the Amici prism of the ramp type of double light path, and thickness reduces similar Half.
Identical with second embodiment, fourth embodiment is equally with the presence of two kinds of the Mixed Zone of two transmitted light beams The situation of the transmitted light of polarization state, as shown in figure 15.To solve this technical problem, fifth embodiment of the invention provides Figure 16 institutes The polarization modulating arrangement of the stereoprojection light shown, this embodiment are suitable for the situation that spectators wear rotatory polarization glasses.
6 are please referred to Fig.1, the position that the polarization form converter 3421 unlike fourth embodiment is placed, the present embodiment will Polarization form converter 3421 is attached at 3212 transmissive of second substrate and goes out on the surface of the second transmitted light beam and the first the reflected beams, So equivalent to the second transmitted light beam with the first transmitted light beam mix before, just by the polarization state of the second transmitted light into Gone conversion, figure 15 illustrates Mixed Zone in light beam polarization state it is consistent.It should be appreciated that it is being embodied When, polarization form converter 3421 can also be attached to 3211 transmissive of first substrate and go out the first transmitted light beam and the second reflected light On the surface of beam.
, in the present embodiment can be by partially for the polarization beam splitting assembly of the prism structure form shown in fourth embodiment Polarization state converter 3421 is packaged in the polarization splitting prism group, and it is saturating positioned at 3225 transmissive of the second polarization spectro layer to go out second The side of irradiating light beam and the first the reflected beams, as shown in figure 17.It is of course also possible to polarization form converter 3421 is packaged in first 3224 transmissive of polarization spectro layer goes out the side of the first transmitted light beam and the second the reflected beams.
5th embodiment remainder is identical with fourth embodiment, repeats no more.
In conclusion in the 5th embodiment, the projected light beam corresponding to a secondary complete image picture is not only when being polarized It is divided into two the reflected beams by the polarization spectro layer on two substrates or by two polarization spectro layers inside prism group, and In the second transmitted light beam before being mixed with the first transmitted light beam, just the polarization state of the second transmitted light is converted, Therefore, while effectively reducing the optical path difference of the reflected beams and transmitted light beam, being substantially reduced whole device volume, also more have Beneficial to modulation of the follow-up polarization Light modulation element to the polarization state of two transmitted light beams, equally, the " V " shape knot in the present embodiment The polarization beam splitting assembly of structure can also accomplish thinner compared with the Amici prism of the ramp type of double light path, and thickness reduces similar Half.
Sixth embodiment of the invention additionally provides a kind of stereoscopic image showing system, including projector, polarization modulating arrangement And curtain.Wherein, projector is used to be projected the projected light beam for carrying left-eye images information successively with frame sequential and carried The projected light beam of right-eye image information；Polarization modulating arrangement can provide polarization modulating arrangement using any embodiment above； And curtain is then used for having identical polarization state for what the polarization modulating arrangement of the stereoprojection light modulated as imaging surface Each projected light beam imaging, and by imaging reflex to user wearing 3D glasses.
Seventh embodiment of the invention additionally provides a kind of polarization modulation method of stereoprojection light, and the described method includes following Step：
Step S1, will carry the projected light beam beam splitting of image information for the first transmitted light beam with the first polarization state, The second transmitted light beam with the second polarization state, the first the reflected beams with the second polarization state and with the first polarization state Two the reflected beams；Wherein, the first transmitted light beam and the second transmitted light beam gone out by beam splitting is propagated to the direction where imaging surface, And it is that the complete image of a width is drawn that first the reflected beams and second the reflected beams are finally sliceable on imaging surface Face
Step S2, adjusts the direction of propagation of the first the reflected beams and the second the reflected beams so that the first the reflected beams and the Two the reflected beams are propagated to the direction where imaging surface.
Step S3, to the part in the first transmitted light beam, the second transmitted light beam, the first the reflected beams, the second the reflected beams Or all carry out polarization state modulation so that the first transmitted light beam, the second transmitted light beam, the first the reflected beams, the second the reflected beams With identical polarization state.
Above steps concrete implementation principle refers to content disclosed above, no longer repeats one by one.
It should be noted that the various embodiments described above are in the specific implementation, different functional units can also be added and realized accordingly Effect, for example, the polarizer of filtration can be set in the light path of each light beam so that the polarization state of each light beam is more To be pure, optical path compensation component can also be set in the light path of segment beam so that all light beams are when reaching imaging surface Light path it is identical.
The foregoing is merely a prefered embodiment of the invention, is not intended to limit the invention, it is all the present invention spirit and All any modification, equivalent and improvement made within principle etc., should all be included in the protection scope of the present invention.

Claims (15)

  1. A kind of 1. polarization modulating arrangement of stereoprojection light, it is characterised in that including：
    Polarization beam splitting assembly, the projected light beam beam splitting for will carry image information are the first transmission with the first polarization state Light beam, the second transmitted light beam with the second polarization state, the first the reflected beams with the second polarization state and with first polarization Second the reflected beams of state；Wherein, the first transmitted light beam and the second transmitted light beam gone out by beam splitting is to the side where imaging surface To propagation, and image space of first transmitted light beam with first the reflected beams on imaging surface is identical, and described Image space of two transmitted light beams with second the reflected beams on imaging surface is identical；
    First optical path direction adjusts component, for adjusting the direction of propagation of first the reflected beams so that first reflection Light beam is propagated to the direction where imaging surface；
    Second optical path direction adjusts component, for adjusting the direction of propagation of second the reflected beams so that second reflection Light beam is propagated to the direction where imaging surface；
    Polarization state modulation component, for first transmitted light beam, second transmitted light beam, first the reflected beams and Part or all of in second the reflected beams carries out polarization state modulation, so that first transmitted light beam, described second saturating Irradiating light beam, first the reflected beams and second the reflected beams have identical polarization state.
  2. 2. the polarization modulating arrangement of stereoprojection light as claimed in claim 1, it is characterised in that first polarization state and Two polarization states are linear polarization and the polarization direction of the two is orthogonal；The polarization state modulation component includes：Polarization converted unit And optical modulator；
    The polarization converted unit, for by the polarization state of first transmitted light beam and second the reflected beams from first Polarization converted is the second polarization state, so that first transmitted light beam, second transmitted light beam, first the reflected beams It is the second polarization state with second the reflected beams；Alternatively, it is used for second transmitted light beam and first reflected light The polarization state of beam from the second polarization converted be the first polarization state so that first transmitted light beam, second transmitted light beam, First the reflected beams and second the reflected beams are the first polarization state；
    Alternatively, the polarization converted unit, for when playing the corresponding picture frame of left-eye images, by first transmitted light The polarization state of beam and second the reflected beams from the first polarization converted be the second polarization state so that first transmitted light Beam, second transmitted light beam, first the reflected beams and second the reflected beams are the second polarization state, and are being played During the corresponding picture frame of right-eye image, by the polarization state of second transmitted light beam and first the reflected beams from the second polarization State is converted to the first polarization state so that first transmitted light beam, second transmitted light beam, first the reflected beams and institute It is the first polarization state to state the second the reflected beams；
    The optical modulator, for unified the first transmitted light beam with the first polarization state or the second polarization state, second to be transmitted Light beam, the first the reflected beams and the second the reflected beams are modulated to left circularly polarized light and right-circularly polarized light according to frame sequential.
  3. 3. the polarization modulating arrangement of stereoprojection light as claimed in claim 1, it is characterised in that first polarization state and Two polarization states are linear polarization and the polarization direction of the two is orthogonal；The polarization state modulation component includes：First polarization converted Device, the second polarization form converter and optical modulator；
    Wherein, first polarization form converter is located in the light path where the first the reflected beams, for by the first the reflected beams Polarization state from the second polarization converted be the first polarization state；Second polarization form converter is located at where the second transmitted light beam Light path on, for by the polarization state of the second transmitted light beam from the second polarization converted be the first polarization state；
    Alternatively, first polarization form converter is located in the light path where the second the reflected beams, for by the second the reflected beams Polarization state from the first polarization converted be the second polarization state；Second polarization form converter is located at where the first transmitted light beam Light path on, for by the polarization state of the first transmitted light beam from the first polarization converted be the second polarization state；
    The optical modulator, for unified the first transmitted light beam with the first polarization state or the second polarization state, second to be transmitted Light beam, the first the reflected beams and the second the reflected beams are modulated to left circularly polarized light and right-circularly polarized light according to frame sequential.
  4. 4. the polarization modulating arrangement of stereoprojection light as claimed in claim 3, it is characterised in that the polarization beam splitting assembly bag Two substrates are included, two substrates are connected with each other and are in the shape of the letter V, and the propagation of the protrusion direction and projected light beam for the formed ridge that is connected Direction contrary；
    Polarization spectro layer is equipped with described two substrates, and the polarization spectro layer transmissive of first substrate therein goes out first Transmitted light beam and reflect the first the reflected beams, the polarization spectro layer transmissive of second substrate goes out the second transmitted light beam and reflects Second the reflected beams.
  5. 5. the polarization modulating arrangement of stereoprojection light as claimed in claim 4, it is characterised in that：
    Second polarization form converter is attached at the second substrate transmissive and goes out on the surface of the second transmitted light beam；
    Go out alternatively, second polarization form converter is attached at the first substrate transmissive on the surface of the first transmitted light beam.
  6. 6. the polarization modulating arrangement of stereoprojection light as claimed in claim 3, it is characterised in that the polarization beam splitting assembly is Polarization splitting prism group；The polarization splitting prism group is bonded by least three prisms to be formed, and joint place has two polarizations point Photosphere, two polarization spectro layers are connected with each other and are in the shape of the letter V, and the propagation of the protrusion direction and projected light beam for the formed ridge that is connected Direction contrary, and the first polarization spectro layer transmissive therein goes out the first transmitted light beam and reflects the first the reflected beams, the Two polarization spectro layer transmissive go out the second transmitted light beam and reflect the second the reflected beams.
  7. 7. the polarization modulating arrangement of stereoprojection light as claimed in claim 6, it is characterised in that：
    Second polarization form converter is packaged in the polarization splitting prism group, and can positioned at the second polarization spectro layer Transmit the side of the second transmitted light beam；
    Alternatively, second polarization form converter is packaged in the polarization splitting prism group, and positioned at the described first polarization point Photosphere transmissive goes out the side of the first transmitted light beam.
  8. 8. the polarization modulating arrangement of stereoprojection light as claimed in claim 1, it is characterised in that first polarization state and Two polarization states are linear polarization and the polarization direction of the two is orthogonal；The polarization state modulation component includes：Polarization converted unit And optical modulator；
    The polarization converted unit is at the same time positioned at the light path where first the reflected beams and the second transmitted light beam institute Light path on；
    Alternatively, the polarization converted is at the same time positioned at the light path where the second the reflected beams and the light path where the first transmitted light beam On；
    The optical modulator, for unified the first transmitted light beam with the first polarization state or the second polarization state, second to be transmitted Light beam, the first the reflected beams and the second the reflected beams are modulated to left circularly polarized light and right-circularly polarized light according to frame sequential.
  9. 9. the polarization modulating arrangement of stereoprojection light as claimed in claim 8, it is characterised in that the polarization beam splitting assembly bag Two substrates are included, two substrates are connected with each other and are in the shape of the letter V, and the propagation of the protrusion direction and projected light beam for the formed ridge that is connected Direction is identical；
    Described two substrates include first substrate and second substrate, and polarization is equipped with the first substrate and the second substrate Beam splitter layer, and the polarization spectro layer transmissive of first substrate therein goes out the first transmitted light beam and reflects the first reflected light Beam, the polarization spectro layer transmissive of second substrate go out the second transmitted light beam and reflect the second the reflected beams, wherein, by described First the reflected beams that the polarization spectro layer beam splitting of one substrate goes out may pass through the second substrate again by second light path The direction of propagation is adjusted the direction to where imaging surface by direction adjustment component, by the polarization spectro layer beam splitting of the second substrate Second the reflected beams gone out may pass through the first substrate and adjust component by the direction of propagation by first optical path direction again Adjust the direction to where imaging surface.
  10. 10. the polarization modulating arrangement of stereoprojection light as claimed in claim 9, it is characterised in that the polarization converted list Member is attached at the second substrate transmissive and goes out on the surface of the second transmitted light beam and the first the reflected beams；
    Alternatively, the polarization converted unit, which is attached at the first substrate transmissive, goes out the first transmitted light beam and the second reflected light On the surface of beam.
  11. 11. the polarization modulating arrangement of stereoprojection light as claimed in claim 8, it is characterised in that the polarization beam splitting assembly For polarization splitting prism group；The polarization splitting prism group is bonded by least three prisms to be formed, and joint place has two polarizations Beam splitter layer, two polarization spectro layers are connected with each other and are in the shape of the letter V, and be connected the formed protrusion direction of ridge and the biography of projected light beam It is identical to broadcast direction, and the first polarization spectro layer transmissive therein goes out the first transmitted light beam and reflects the first the reflected beams, Second polarization spectro layer transmissive goes out the second transmitted light beam and reflects the second the reflected beams, wherein, by the described first polarization point First the reflected beams that photosphere beam splitting goes out may pass through the second polarization spectro layer and be adjusted again by second optical path direction The direction of propagation is adjusted the direction to where imaging surface by component, second reflected light gone out by the second polarization spectro layer beam splitting Beam may pass through the first polarization spectro layer and again be adjusted the direction of propagation to imaging table by first optical path direction adjustment component Direction where face.
  12. 12. the polarization modulating arrangement of stereoprojection light as claimed in claim 11, it is characterised in that the polarization converted list Member is packaged in the polarization splitting prism group, and goes out the second transmitted light beam and positioned at the second polarization spectro layer transmissive The side of one the reflected beams；
    Alternatively, the polarization converted unit is packaged in the polarization splitting prism group, and it is located at first polarization spectro Layer transmissive goes out the side of the first transmitted light beam and the second the reflected beams.
  13. 13. such as the polarization modulating arrangement of claim 1 to 12 any one of them stereoprojection light, it is characterised in that described inclined The polarization spectro layer for being used in beam splitting component carry out projected light beam polarization beam splitting that shakes is wire grid construction, wherein, beam splitting goes out first Each grid arrangement direction of the wiregrating part of transmitted light beam and the first the reflected beams, goes out the second transmitted light beam and second anti-with beam splitting Each grid arrangement direction of the wiregrating part of irradiating light beam is mutually orthogonal.
  14. A kind of 14. stereoscopic image showing system, it is characterised in that including：
    Projector, the projected light beam of left-eye images information is carried for being projected successively with frame sequential and carries right-eye image The projected light beam of information；
    The polarization modulating arrangement of claim 1 to 13 any one of them stereoprojection light；
    Curtain, for each projected light beam with identical polarization state modulated for the polarization modulating arrangement of the stereoprojection light It is imaged, and imaging is reflexed to the 3D glasses of user's wearing.
  15. 15. a kind of polarization modulation method of stereoprojection light, it is characterised in that the described method includes following step：
    By the projected light beam beam splitting for carrying image information for the first transmitted light beam with the first polarization state, with the second polarization Second transmitted light beam of state, the first the reflected beams with the second polarization state and the second the reflected beams with the first polarization state； Wherein, the first transmitted light beam and the second transmitted light beam gone out by beam splitting is propagated to the direction where imaging surface, and described first Image space of the transmitted light beam with first the reflected beams on imaging surface is identical, second transmitted light beam and described the Image space of two the reflected beams on imaging surface is identical；
    Adjust the direction of propagation of the first the reflected beams and the second the reflected beams so that the first the reflected beams and the second the reflected beams to Propagate in direction where imaging surface；
    It is inclined to the part or all of progress in the first transmitted light beam, the second transmitted light beam, the first the reflected beams, the second the reflected beams Polarization state is modulated so that the first transmitted light beam, the second transmitted light beam, the first the reflected beams, the second the reflected beams have identical inclined Polarization state.
CN201711172785.0A 2017-11-22 2017-11-22 Polarization modulating arrangement, method and the stereoscopic image showing system of stereoprojection light Pending CN107976820A (en)

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CN108873364A (en) * 2018-06-29 2018-11-23 歌尔股份有限公司 A kind of laser projection device

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