CN207051654U - Stereoprojection imaging device and system - Google Patents

Abstract

Light path recovery reduction optical energy loss can be carried out the utility model discloses one kind and improves projection imaging quality, and suitable for specular removal stereoprojection imaging device and system of the low projection than theatre environment, stereoprojection imaging device includes polarizing beam splitter, reflecting element, beam size adjusts component, linear polarizer, light polarization modulator, polarization form converter, the polarizing beam splitter is polarization splitting prism combination or polarization spectro plate, the reflecting element uses high reflection polarization element, the high reflection polarization element is by protective layer, reflecting layer, absorbed layer, glass substrate is formed, the polarization form converter possesses wavelength bandwidth adjustment function.Stereoprojection imaging device provided by the utility model can effectively reduce the reflected beams and the optical path difference of transmitted light beam, overall structure is more optimized, so that the volume of whole device is substantially reduced.

Description

Stereoprojection imaging device and system

Technical field

Stereo projection technology field is the utility model is related to, particularly a kind of stereoprojection imaging device and system.

Background technology

Binocular projector with frame sequential successively change play two not homotactic images, at present main flow be left-eye image and Eye image, a sequence are seen that another sequence is seen by right eye by left eye, and alternate presentation is exactly three-dimensional figure Picture.Beholder generally wears anaglyph spectacles, and the figure for its preparation is can be only seen by every eye of anaglyph spectacles beholder The subsequence of picture.It is used for the stereo imaging system of passive type anaglyph spectacles at present.The different sequences initially come out from projector The image of row is unpolarized state light beam, and the polarizing beam splitter configured by stereo imaging system converts unpolarized state light beam For polarizing beam.

However, there is larger optical energy loss or luminous energy scattering and aberration in existing stereoprojection imaging device mostly The problems such as, the picture quality for projecting to obtain is bad.

Utility model content

In order to solve the above problems, the utility model provides one kind and can carry out light path recovery reduction optical energy loss and improve Projection imaging quality, and suitable for specular removal stereoprojection imaging device and system of the low projection than theatre environment.

To achieve the above object, the utility model provides following technical scheme：A kind of stereoprojection imaging device, including：

Polarizing beam splitter, the polarizing beam splitter is that polarization splitting prism combines or polarization spectro plate, for by incident light It is divided into a transmitted light beam and two the reflected beams, the polarizing beam splitter is provided with two reflection of polarization films, two reflection of polarization films It is symmetrical along system neutral, 90 ° ± 15 ° of angle is formed, the reflection exit facet of the prism is symmetrical along system neutral, forms angle 90°±15°；

Reflecting element, two are symmetrically distributed with along the center line of incident ray, for reflect polarizing beam splitter two The reflected beams reflex to screen, and the reflecting element uses high reflection polarization element, the high reflection polarization element by protective layer, Reflecting layer, absorbed layer, glass substrate are formed, and can be effectively protected light path is not influenceed by veiling glare, by the unnecessary P of upper and lower light path Polarization state light is absorbed, and improves reflection efficiency, and the light efficiency of whole system is improved with this；

Reflecting element adjusts structure, and locus and face deformation are carried out by mechanical regulation according to the demand of light beam projecting Change, complete the regulation to the size and location of the reflected beams, to realize the coincidence of light path；

Beam size adjusts component, for adjusting the size of transmitted light beam and two the reflected beams, is shielding three light paths Overlapped on curtain, while adjust the scattering of light beam and eliminate veiling glare in light path, other optical elements of coupled system enter to light path Row amendment, the beam size adjustment component is single lens or multiple lens combinations.

Linear polarizer, for filtering out the veiling glare in reflected light path, correct the adjustment of light path；

Light polarization modulator, for modulating three road light beams, the light polarization modulator has two, and two light polarization modulators are working 1/2 λ is differed under state, switching is switched by the high-frequency of two light polarization modulators, light beam is realized two optical polarization states Light beam separation, with the different polarizing filters of two eyeglasses of corresponding passive type rotatory polarization glasses；

Polarization form converter, for changing the polarization state of light beam, three light beams are made to possess identical optical polarization, institute State polarization form converter and possess wavelength bandwidth adjustment function.

Further, the polarizing beam splitter both sides are respectively equipped with an AR antireflection film, and the AR antireflection films are plated in Prismatic reflection exit facet, reduce light path reflection.

Further, the projection reflector space of the reflecting element is designed as the region with certain radius of curvature.

Further, the polarization form converter includes at least three layers of optical film, has optical compensation function, improves aberration And chromatic dispersion problem.

Further, the lens combination be arranged on before polarizing beam splitter and/or glazing route polarizer before and/or lower light Before route polarizer and/or before middle light path light polarization modulator, the demand that ratio is projected according to movie theatre adjusts lens or lens combination Quantity and the relative position of lens combination plano-concave lens and planoconvex spotlight.

A kind of stereoprojection imaging system, including binocular projector, metal curtain or the curtain for possessing three-dimensional imaging requirement With above-mentioned stereoprojection imaging device, the binocular projector is changed and plays two not homotactic images successively with frame sequential, The stereoprojection imaging device receives the frequency signal that binocular projector's switching plays two not homotactic images, to carry out Control to the first light polarization modulator and the second light polarization modulator, complete to be separated into two differences to two not homotactic images The light beam of optical polarization state, with the different polarizing filters of two eyeglasses of corresponding passive type rotatory polarization glasses.

Compared with prior art, the utility model beneficial effect：

1st, reflecting element adjustment structure can adjust beam size, solve light beam and scheme caused by screen fails to be completely superposed As the problem of degradation.

2nd, beam size adjustment component, as needed, the difference of placement location, transmitted light beam and two reflections can be adjusted The size of light beam, three light paths is overlapped on screen, while adjust the scattering of light beam；Adjust the scattering of light beam simultaneously and disappear Except the veiling glare in light path, other optical elements of coupled system are modified to light path；Especially it is low projection than environment movie theatre, Preceding road light path places beam size adjustment component, is advantageous to reduction system primary optics size.

3rd, for the different projector distance of movie theatre, the angle of divergence and transmitted light path of projection ray and reflected light path to screen Distance be all different, the projection size so on screen is also different, and system is set to the view field of reflecting element Certain radius of curvature is counted, to match rotation up and down and the face that the drop shadow spread of 4-30 rice can be transferred through reflecting element The mechanical regulations such as deformation reach the coincidence of three light paths.

4th, polarization converter has the function of optical compensation, can solve light beam crevice projection angle and become big, image dispersion causes The problem of poor quality images, and the problem of projected image aberration, solution is provided than movie theater for low projection.

Brief description of the drawings

Fig. 1 is a kind of stereoprojection imaging device schematic diagram provided by the utility model.

Fig. 2 is a kind of another form of stereoprojection imaging device provided by the utility model.

Fig. 3 is a kind of another form of stereoprojection imaging device provided by the utility model.

Fig. 4 is the schematic diagram of polarizing beam splitter provided by the utility model.

Fig. 5 is another form of polarizing beam splitter provided by the utility model.

Fig. 6 is another form of polarizing beam splitter provided by the utility model.

Fig. 7 is this high reflection polarization element optical path analysis figure provided by the utility model.

Fig. 8 is the light path schematic diagram of reflecting element adjustment structure provided by the utility model

Fig. 9 is the light path principle figure of high reflection polarization element provided by the utility model.

Figure 10 is the light path principle figure and optical structure chart of high reflection polarization element provided by the utility model.

Figure 11 is that the light path of reflecting element provided by the utility model overlaps schematic diagram.

Figure 12 is the optical compensation schematic diagram of polarization converter provided by the utility model.

Embodiment

Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made The every other embodiment obtained, belong to the scope of the utility model protection.

As shown in figure 1, the utility model provides a kind of stereoprojection imaging device, including beam size adjustment component, That is lens combination 102 and 103, incident beam 137 incides lens combination, by the adjustment of this lens combination, can make incidence Scope diminish, especially solving low projection than the scheme of movie theater, this structure can be applicable lower projection ratio, afterwards, light beam By polarizing beam splitter 104, it is divided into a transmission incident beam 109 and two the reflected beams 108 and 133, after separation, transmitted light Beam 109 is P state polarised lights, and two the reflected beams 108 and 133 are S state polarised lights, and both differ 1/2 λ；

The scope of projection is amplified by transmitted light beam 109 by planoconvex spotlight 132 and plano-concave lens 131, hereafter, projection Light beam enters light polarization modulator 117 and 118, and the first light polarization modulator 117 is in hold mode, polarization state light directly through First light polarization modulator, now the second light polarization modulator 118 is in running order, it will 1/4 λ is rotated to the polarization state of light, Or first light polarization modulator 117 it is in running order, it will the polarization state of the second optical polarization state light is changed to -1/ 4 λ, now the second light polarization modulator 118 be in hold mode, light can be directly through the second light polarization modulator 118, two polarizations Modulator at work, possesses the function of polarization form converter, and two light polarization modulators differ 1/2 λ；Adjusted by two polarizations The high-frequency switch switching of device processed, makes light beam realize the light beam separation of two optical polarization states, with corresponding passive type rotatory polarization The different polarizing filters of two eyeglasses of glasses；

The reflected beams 108,133 incide reflecting element 107 and 134 respectively, and reflecting element 107,134 can pass through reflection Element adjustment construction machine regulation and control, adjust beam size and the movement in each orientation up and down, so that light path overlaps, the reflected beams 108 after reflecting element reflection, through lens combination 110 and 111, as needed, adjusts plano-concave lens and planoconvex spotlight Distance, the projection scope of light beam is adjusted, that is, adjust light beam size, linear polarizer is set after lens combination 112, the veiling glare being mingled with filtering and elimination the reflected beams 108 in S state polarised lights, by the linear polarization after linear polarizer 112 Light, into follow-up light polarization modulator 113 and 114, light beam is set to realize the light beam separation of two optical polarization states, with corresponding quilt The different polarizing filters of two eyeglasses of dynamic formula rotatory polarization glasses, the light beam after light polarization modulator 113 and 114 enter To polarization form converter 115 and 116, polarization form converter 115 and 116 is respectively equivalent to the function of quarter wave plate, is accumulated as 1/2 The function of wave plate；It is used for the optical polarization state for changing light beam, three light beams is possessed identical optical polarization state.

Multiple lens combinations are added in the stereoprojection imaging device of this kind of form, this structure can be applicable lower throwing Ratio is penetrated, the applicable projection of current most stereoprojection imaging devices is than minimum 1.0-1.2, the stereoprojection imaging dress of this structure Projection can be applicable than the movie theater for 0.5-0.8 by putting.

Fig. 2 is a kind of another form of stereoprojection imaging device provided by the utility model, the solid of this structure Projection imaging device eliminates lens combination, simple to realize that three light paths overlap by reflecting element 107 and 134, reflecting element 107 and 134 have carried out the design of radius of curvature in reflector space, to meet the needs of different projector distances.

A kind of Fig. 3 another forms of stereoprojection imaging device provided by the utility model.The three-dimensional throwing of such a form Shadow imaging device eliminates the polarization converter of upper and lower light path, adds the polarization converter 301 and 302 of middle light path, change Afterwards, upper, middle and lower light path can equally realize the uniformity of the polarization state of three light paths of upper, middle and lower；Meanwhile reflecting element 107 is adopted With high counterelement is polarized, influence of the veiling glare to upper and lower light path is reduced.

Fig. 4 is the structural representation of polarizing beam splitter provided by the utility model, and polarizing beam splitter is polarization splitting prism Combination, including four prisms 402,403,408 and 411, this four part can use the identical or different material of refractive index, just The material often used is H-K9L, and refractive index is nd=1.51680 ± 0.0005.α scope is 50 ° to 90 °, and β scope is 90 ° to 180 °, 403 and 411 angle is consistent with α, symmetrical along system neutral, whole to adjust by adjusting this three angles The veiling glare of individual light path and the elimination of reflected light；Prismatic reflection exit facet is coated with AR antireflection films, for reducing the generation of reflected light, Increase transmitance；Incident ray can avoid direct incident polarization optical splitter in this structure and produce chromatic dispersion problem.

Fig. 5 is another structural representation of polarizing beam splitter provided by the utility model, the polarizing beam splitter of the structure Be made up of six prisms 502,503,504,509,513,514,503,504 is symmetrical along system centre with 513,514, using with its The identical refractive index in his part and the material of dispersive power or different refractivity dispersive power, using refraction of light path, light path characteristic is entered Row amendment；And combined suitable for fit lens, light path is adjusted.

Fig. 6 is another structural representation of polarizing beam splitter provided by the utility model, the polarizing beam splitter of the structure Be made up of four prisms 602,603,607,610, incident ray this structure can avoid direct incident polarization optical splitter and Produce chromatic dispersion problem；50 ° to 90 ° of α scope, 603 and 610 angle is consistent with α, symmetrical along system neutral, passes through tune This three angles are saved to adjust the elimination of the veiling glare of whole light path and reflected light；AR antireflection films, plated film are emitted in prismatic reflection Face, the generation of reflected light is reduced, increase transmitance.

Polarizing beam splitter provided by the utility model can also be the combination of multiple polarization spectro plates.

Fig. 7 is high reflection polarization element optical path analysis figure provided by the utility model, in original state, incipient beam of light Tp =100%/Ts=100%, after reflection of polarization film, transmitted light beam Tp1=96%/Ts1=0.1%, the reflected beams Rp1 =4%/Rs1=99.9%, the reflected beams pass through high reflection polarization element 702, and the efficiency of element is Rp3=5%/Rs3= 99%, obtained Rp2=Rp1*Rp3=4%*5%=0.2%/Rs2=Rs1*Rs3=99.9%*99%=98.9%；It is logical System more specular removal can be obtained by crossing this design., can be more anti-than common using this high reflection polarization element as reflecting element The light efficiency increase by 6% of element is penetrated, and is effectively improved the interference to light path of the P state polarised lights of upper and lower light path.

Fig. 8 show the light path schematic diagram of reflecting element adjustment structure provided by the utility model.Reflecting element 803, use Screen is reflexed in two the reflected beams for reflecting polarizing beam splitter；Reflecting element can be carried out according to the demand of light beam projecting The rotating, move of locus, push-and-pull, deformation, complete the regulation to the size and location of the reflected beams, to realize the weight of light path Close.Incident beam 801 obtains light beam 805 after the reflection of reflecting element 803；By the contraction distortion of reflecting element 803 it Afterwards, 802 are obtained, incident beam 801 is by after reflecting element 802, obtaining light beam 804；, can be right clearly by this adjustment The projecting direction of the reflected beams is adjusted；After by such adjustment three light paths of upper, middle and lower can overlap.This knot Structure can be combined with fit lens, expand the adjustable range of system, and make the regulation of system more careful, more precisely.

Fig. 9 show the light path principle figure of high reflection polarization element provided by the utility model, when light is with Brewster During the incidence of angle, in reflection light only have S-polarization state light, no P polarization state light, P polarization state light completely through.Brewster angle with The refractive index of the incident two kinds of materials in interface is relevant, for example Brewster angle during from air incidence to K9 glass is 56.5 °.Setting When counting high reflection polarization element, assembly of thin films is rationally designed, ensures meeting brewster effect as far as possible compared with broadband scope, S-polarization light is allowed to try one's best high reflection, P polarization light is tried one's best high transmission.As shown in figure 9, under efficient state, incipient beam of light Tp= 100%/Ts=100%, after reflection, Rp=0/Rs=15.2%, after being reflected again after superrefraction, Rp1= 0%/Rs1=84.8%*15.2%*84.8%, and the light beam through being projected after superrefraction, Tp=100%/Ts=84.8%* 84.8%, building for membrane system is carried out according to this design, reaches almost P polarization state light and all passes through, while S-polarization state light is high anti- Penetrate.

Figure 10 is the light path principle figure and optical structure chart of high reflection polarization element provided by the utility model, and high reflection is inclined Optical element is made up of protective layer 1001, reflecting layer 1002, absorbed layer 1003, glass substrate 1004；Light path can be effectively protected Do not influenceed by veiling glare, by the unnecessary P polarization state light absorbs of upper and lower light path；The principle of reflecting layer as shown in Figure 9 carries out membrane system Design is built.

Figure 11 is that the light path of reflecting element provided by the utility model overlaps schematic diagram.There is divergent angle A in projection ray, transmission Light path and the distance of reflected light path to screen are different, and the projection size so on screen is also different, respectively a and b, when The change in location of screen, a and b size also change.Need by the design of the radius of curvature of reflecting element and mechanical adjustment and The regulation of lens combination, overlap a and b.

Figure 12 is the principle schematic of the optical film provided by the utility model that can carry out optical compensation, and wavelength exists 400nm-700nm visible ray, the optical characteristics of the visible ray of different wave length is different, especially in the bigger feelings in visual angle Under condition, if without optical compensation, will aberration and chromatic dispersion problem；Pass through quarter wave plate in visible ray, we want what is pursued Lines c state, but actually we obtain be lines a state, by after suitable optical compensation, we Lines b state can be obtained, so the light of each wavelength of visible ray is influenceed just to have obtained good constraint；Under process One layer of 1/4 slide optical compensation films, similar reverse compensation can be carried out once again, by further close to the state of c lines, It is possible thereby to solve the problems, such as and improve aberration and dispersion.This optical compensation films needs the optics of multilayer different angle different wave length Film compensates synthesis, such as with three layers of optical film ,+108 ° of a 140nm (1/4 λ) ,+32 °, one of a 270nm (1/2 λ) + 5.5 ° of 270nm (1/2 λ), after this three layers of optical film synthesis, there is quarter wave plate function, and the work(of optical compensation Energy.

Obviously, it is new without departing from this practicality can to carry out various changes and modification to utility model by those skilled in the art The spirit and scope of type.So, if these modifications and variations of the present utility model belong to the utility model claims and its Within the scope of equivalent technologies, then the utility model is also intended to comprising including these changes and modification.

Claims (6)

1. A kind of 1. stereoprojection imaging device, it is characterised in that including：

   Polarizing beam splitter, the polarizing beam splitter is polarization splitting prism combination or polarization spectro plate, for incident light to be divided into One transmitted light beam and two the reflected beams, the polarizing beam splitter are provided with two reflection of polarization films, two reflection of polarization films edge systems Center line of uniting is symmetrical, forms 90 ° ± 15 ° of angle, and the reflection exit facet of the prism is symmetrical along system neutral, and 90 ° of angle of composition ± 15°；

   Reflecting element, two are symmetrically distributed with along the center line of incident ray, for two reflections for reflecting polarizing beam splitter Light beam reflexes to screen, and the reflecting element uses high reflection polarization element, and the high reflection polarization element is by protective layer, reflection Layer, absorbed layer, glass substrate are formed；

   Reflecting element adjusts structure, and locus and face fractal transform are carried out by mechanical regulation according to the demand of light beam projecting, complete The regulation of the size and location of paired the reflected beams, to realize the coincidence of light path；

   Beam size adjusts component, for adjusting the size of transmitted light beam and two the reflected beams, makes three light paths on screen Overlap, while adjust the scattering of light beam and eliminate veiling glare in light path, other optical elements of coupled system repair to light path Just, the beam size adjustment component is single lens or multiple lens combinations；

   Linear polarizer, for filtering out the veiling glare in reflected light path, correct the adjustment of light path；

   Light polarization modulator, for modulating three road light beams, the light polarization modulator has two, and two light polarization modulators are in working condition 1/2 λ of lower difference, switching is switched by the high-frequency of two light polarization modulators, light beam is realized the light of two optical polarization states Beam separates, with the different polarizing filters of two eyeglasses of corresponding passive type rotatory polarization glasses；

   Polarization form converter, for changing the polarization state of light beam, three light beams are made to possess identical optical polarization, it is described inclined Polarization state converter possesses wavelength bandwidth adjustment function.
2. 2. stereoprojection imaging device according to claim 1, it is characterised in that the polarizing beam splitter both sides are set respectively There is an AR antireflection film, the AR antireflection films are plated in prismatic reflection exit facet, reduce light path reflection.
3. 3. stereoprojection imaging device according to claim 1, it is characterised in that the projection echo area of the reflecting element Domain is designed as the region with certain radius of curvature.
4. 4. stereoprojection imaging device according to claim 1, it is characterised in that the polarization form converter is at least by three Layer optical film composition, has optical compensation function, improves aberration and chromatic dispersion problem.
5. 5. stereoprojection imaging device according to claim 1, it is characterised in that the lens combination is arranged on polarization point Before light device and/or before glazing route polarizer and/or before lower light path linear polarizer and/or before middle light path light polarization modulator, root According to movie theatre projection ratio demand adjustment lens or lens combination quantity and lens combination plano-concave lens and planoconvex spotlight it is relative Position.
6. 6. a kind of stereoprojection imaging system, including binocular projector, metal curtain or possess three-dimensional imaging requirement curtain and Stereoprojection imaging device described in claim any one of 1-3, the binocular projector change broadcasting two with frame sequential successively Individual not homotactic image, the stereoprojection imaging device receive binocular projector's switching and play two not homotactic images Frequency signal, to carry out the control to the first light polarization modulator and the second light polarization modulator, complete not homotactic to two Image is separated into the light beam of two different optical polarization states, with the different of two eyeglasses of corresponding passive type rotatory polarization glasses Polarizing filter.