CN106707668A - Polarized light reuse imaging method and micro optical engine system based on optical wand - Google Patents
Polarized light reuse imaging method and micro optical engine system based on optical wand Download PDFInfo
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- CN106707668A CN106707668A CN201611150543.7A CN201611150543A CN106707668A CN 106707668 A CN106707668 A CN 106707668A CN 201611150543 A CN201611150543 A CN 201611150543A CN 106707668 A CN106707668 A CN 106707668A
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- 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
- G03B21/20—Lamp housings
- G03B21/208—Homogenising, shaping of the illumination light
-
- 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
- G03B21/20—Lamp housings
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2033—LED or laser light sources
-
- 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
- G03B21/20—Lamp housings
- G03B21/206—Control of light source other than position or intensity
-
- 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
- G03B21/20—Lamp housings
- G03B21/2073—Polarisers in the lamp house
Abstract
The invention discloses a polarized light reuse imaging method and a micro optical engine system based on an optical wand. Illuminating rays emitted by an LED illumination light source pass through the non-imaging optical element optical wand, a splitting lens and a polarized light conversion system to realize uniform light, beam splitting and shaping and polarized light conversion of the illuminating rays, and reaches an LCoS micro-display chip through collection and transfer of a follow-up relay system to form uniform illuminating spots; the illuminating spots illuminate an image on the LCoS micro-display chip to form a required image; and then, projection imaging is carried out on the image through a PBS polarizing prism, an imaging projection objective lens or an eye lens, wherein the optical wand serves as a generation source of a two-dimensional virtual light source array, the splitting lens carries out re-imaging on the two-dimensional virtual light source array formed at the front end of the optical wand, and the corresponding polarized light conversion system is added to a splitting surface of the illuminating rays to realize conversion of polarized light. The method can greatly improve light efficiency under the condition of basically not increasing size and cost of an original illumination system.
Description
Technical field
The invention belongs to new display technology field, specially a kind of polarised light multiplexed imaging method based on optical wand and micro-
Type optical engine system.
Background technology
In recent years, developing rapidly with many technologies such as microelectronics, optics, processing technology, modern business mobile office
Pattern is popularized, and hand-held digital product increases, and is miniaturizated to the new direction of new Display Technique development.It is early in new display field
The micro projection Display Technique of phase, and VR, AR Display Technique in the wearable display device of intelligence of prevalence at present, also all exist
Rapidly develop.At present, intelligently wearable micro display technology is mainly with DLP (Digital for micro projection and high-resolution
Light Processor), LCoS (Liquid Crystal on Silicon), and OLED (Organic Light
Emitting Display) based on technology.DLP technologies have the advantages that reflectivity it is high, without polarised light, but DMD
（Digital Micro-Mirror Device）Chip manufacturing process is complicated, is that TI companies exclusively control, and this also causes its cost
It is very high.OLED has contrast higher and quick response time, but high-resolution OLED micro display chips cost is very
Height, service life is relatively short.By contrast, LCoS technologies are true to nature with its low cost, high-resolution, rich color, and picture is certainly
Substantial portion of micro- projection display market so is occupied without advantages such as pixel senses, but because LCoS can only be carried out to polarised light
Spatial modulation causes its light efficiency relatively low.
Want the light efficiency of raising LCoS micro display systems, it is important to how rationally efficiently for LCD panel provides illumination.
Although the working method of LCoS micro display systems is not limited by brightness and energy, with the throwing that diminishes of liquid crystal chip size
Shadow luminous energy output also approximate decline linear therewith, therefore LCoS optical systems should as far as possible improve the light energy collection of whole system
Rate and utilization rate.Because liquid crystal can produce the effects such as birefringence, therefore in liquid crystal micro display system, when illumination light is incided
When on LCoS display chips, the polarised light of only specific direction is utilized.The lighting source used in miniature display system sends
Be natural light, need to using polarised light conversion prism PBS be the polarised light with same polarization state by natural light Efficient Conversion.Institute
It is wasted in the effective energy by there is half after PBS with inevitably resulting in luminous energy so that the light efficiency of LCoS display systems
Rate is unable to reach gratifying effect, but if can make originally by being wasted after PBS that it is a part of it is another partially
The polarised light of polarization state is re-used, and situation is just made a world of difference, therefore reasonably polarizes optical multiplexing method, it will very well
Ground solves this problem, greatly improves illumination light efficiency.
The method for making a general survey of traditional polarisation multiplexing, wherein it is commonplace it is a kind of be that the polarization light multiplexing based on compound eye is miniature
Light engine systems, but its problem being primarily present be compound eye lens unit and polarization converter device unit size all too
It is small, production and processing is not easy to, this will not only cause that mold and the polishing of PCS become very difficult, while also causing half-wave plate
Splicing is extremely difficult, and is based on the polarization optical multiplexing method of birefringece crystal, due to use to birefringece crystal block, but it
Manufacturing process is sufficiently complex.Answered as the polarisation such as some other application Polarization interference filters and macromolecule polarization light conversion film
For method, its light conversion efficiency is not high.
The content of the invention
For problems of the prior art, it is an object of the invention to provide a kind of polarization light multiplexing based on optical wand
Imaging method and micro-optical automotive engine system.
A kind of polarised light multiplexed imaging method based on optical wand, the illuminating ray that LED illumination light source sends passes through non-imaged
Optical element optical wand, beam dividing lens and polarization conversion system realize even light to illuminating ray, beam splitting shaping and partially
The light that shakes is changed, and collection by subsequent relay system is delivered to up to LCoS micro display chips, forms uniform illumination spot, should
Illumination spot illuminates the image of LCoS micro display chips, the image needed for being formed, and is then thrown by PBS devating prisms, imaging
The image is carried out projection imaging by shadow object lens or eyepiece；
Wherein, described LED illumination light source is single channel or multichannel；
Wherein, described optical wand as two-dimentional imaginary light source array generating source, beam dividing lens are to being formed at the two dimension of light nose
Imaginary light source array carries out reimaging, to obtain the beamlet array being separated from each other, and in the beam-splitting surface addition correspondence of illuminating ray
Polarization conversion system, so as to realize the conversion of polarised light.
The polarization light multiplexing micro-optical automotive engine system based on optical wand of a kind of use methods described, along the light direction of propagation
Set gradually for：LED illumination light source, optical wand, beam dividing lens, polarization conversion system, relay lens group without optical shaping,
PBS devating prisms, LCoS micro display chips and projection object lens or eyepiece.
X-Cube color-combination prisms are further provided with, when LED illumination light source is multichannel, per all the way respectively through respective light
Rod, beam dividing lens, carry out conjunction color, subsequently into polarization conversion system by X-Cube color-combination prisms.
There is a spacing less than 3mm between the light extraction side of described LED illumination light source and optical wand.
The light extraction side of described LED illumination light source is affixed or imbeds in optical wand with optical wand.
Described optical wand is from square rod or cone rod, and the cross section of optical wand is rectangle or regular polygon, and material is glass
Or plastics.
The left side of described beam dividing lens and optical wand exit facet have a spacing less than 3mm, the beam dividing lens with
The relative face of optical wand is plane or cambered surface.
The left side of described beam dividing lens is connected as a single entity with optical wand, and the face that the beam dividing lens are connected with optical wand is plane.
Described LCoS micro display chips are LCD, CF-LCoS or CS-LCoS of transmission-type.
Described LED illumination light source is the LED light source of planar package, and the LED illumination light source of described planar package is single
White-light LED chip, or single LEDs being made up of the luminescence chip of the color of red, green, blue three, or red, green, blue three
Independent monochromatic LED is illuminated simultaneously.
Beneficial effects of the present invention：
By the use of non imaging optical element optical wand as the generating source of two-dimension light source virtual image array, and combination beam shaping lens group will
The two-dimentional imaginary light source array carries out secondary imaging, realizes the effective segmentation to illuminating ray, obtains the beamlet battle array of two dimensional separation
Row, and the polarization conversion system PCS that addition matches at the illuminating ray beam-splitting surface so that the light that LED sends is entering
Just changed for the polarised light of same polarization state entirely before devating prism, the polarised light of another polarization state that will be slatterned in the past
Also reuse, it is to avoid illumination light has the polarised light of nearly half after devating prism in traditional optical wand illuminator
Situation about being wasted, illumination light efficiency is substantially increased in the case where illuminator size and cost is not increased substantially, can
The illumination spot of more high brightness is obtained, and light multiplexing LCoS illuminators are polarized and based on birefringence compared to traditional compound eye
For the polarization optical multiplexing method of crystal, whether it there are obvious advantage in terms of cost or processing technology.
Brief description of the drawings
The present invention is further elaborated with reference to Figure of description.
The schematic diagram that Fig. 1-1 is formed for the two-dimentional imaginary light source array of light nose；
Fig. 1-2 is the specific distribution situation of the two-dimentional imaginary light source of light nose；
Fig. 2 is the size relationship figure of LED illumination light source and light plane rod end；
Fig. 3 produces the optical schematic diagram of beam splitting for light that LED illumination light source sends after beam dividing lens shaping；
The light that Fig. 4 is sent for LED illumination light source is after beam splitting shaping and carries out the index path of polarised light conversion；
Fig. 5-1 is that illuminating ray is right between the beamlet array Illumination Distribution obtained by beam-splitting surface and polarization conversion system position
Should be related to
Fig. 5-2 is the space three-dimensional structure schematic diagram of polarization conversion system；
Fig. 6 is the polarised light transfer principle figure of polarization conversion system；
Fig. 7 is the structural representation of the single LEDs being made up of three kinds of luminescence chips of red, green, blue being related in the present invention；
Fig. 8 be the single LEDs being made up of red, green, blue three-colour light-emitting chip being related in the present invention illuminate based on optical wand
The schematic diagram of polarization light multiplexing micro-optical automotive engine system embodiment one；
Fig. 9 is the polarization light multiplexing micro-optical engine based on optical wand of the single White-light LED illumination of utilization being related in the present invention
The schematic diagram of system embodiment two；
Figure 10 is related in the present invention using red, green, blue this three polarizations based on optical wand of single LED illumination
The schematic diagram of light multiplexing micro-optical automotive engine system embodiment three.
In figure, 1- LED illumination light sources, 2- optical wands, 3- beam dividing lens, 4- polarization conversion systems, 5- relay lens
Group, 6- PBS devating prisms, 7- LCoS micro display chips, 8- projections object lens or eyepiece, 9- X-Cube color-combination prisms,
41- PBS prisms, 42- half-wave plates.
Specific embodiment
Traditional compound eye polarization optical multiplexing method is to carry out the general principle of wavefront division to plane wave using compound eye to realize
Illuminating ray beam splitting simultaneously completes polarised light conversion；And it is based on boring the polarization optical multiplexing method of rod and 4F optical systems, do not exist
Illuminating ray is carried out the process of dividing processing in advance, this can to a certain extent increase the bore of former illuminator.The present invention
A kind of polarised light multiplexed imaging method and micro-optical automotive engine system based on optical wand are mainly provided.The present invention by by it is non-into
As optics is combined with image optics, the beam splitting shaping to illuminating ray is realized, be held essentially constant in illuminator bore
Under the premise of, using the secondary imaging phenomenon of the two-dimentional imaginary light source array positioned at optical wand front end face so that illuminating ray itself is produced
Beam splitting, and polarised light conversion is carried out using PBS arrays in illuminating ray beam-splitting surface, so as to the beamlet battle array that will be obtained after beam splitting
Row are all converted to the polarised light of same polarization state.Its theoretical foundation is that the lighting source virtual image array that will be produced by optical wand enters
Row reimaging, to realize that the shaping to illuminating ray is split.The method can be before cost and system dimension not be increased substantially
Put and avoid unnecessary energy dissipation, illumination light efficiency is greatly improved.And for traditional compound eye polarised light
Multiplexing light engine systems apply the polarization optical multiplexing system of birefringece crystal, their not only high cost but also processing technologys
It is highly difficult, so the present invention has very big advantage and realistic meaning.
A kind of polarised light multiplexed imaging method based on optical wand proposed by the present invention, the illumination light that LED illumination light source sends
Line by non imaging optical element optical wand, beam dividing lens and polarization conversion system come realize even light to illuminating ray, point
Beam shaping and polarised light are changed, and collection by subsequent relay system is delivered to up to LCoS micro display chips, forms uniform
Illumination spot, the illumination spot illuminates the image of LCoS micro display chips, the image needed for being formed, then inclined by PBS
The image is carried out projection imaging by shake prism, projection object lens or eyepiece；
Wherein, described optical wand as two-dimentional imaginary light source array generating source, beam dividing lens are to being formed at the two dimension of light nose
Imaginary light source array carries out reimaging, to obtain the beamlet array being separated from each other, and in the beam-splitting surface addition correspondence of illuminating ray
Polarization conversion system, so as to realize the conversion of polarised light.
A kind of polarization light multiplexing micro-optical automotive engine system based on optical wand of use methods described proposed by the present invention, such as
Shown in Fig. 8-10, along the light direction of propagation set gradually for：LED illumination light source 1, optical wand 2, beam dividing lens 3 without optical shaping,
Polarization conversion system 4, relay lens group 5, PBS devating prisms 6, LCoS micro display chips 7 and projection object lens or mesh
Mirror 8.
There is a spacing less than 3mm between the light extraction side of described LED illumination light source 1 and optical wand 2.
The light extraction side of described LED illumination light source 1 is affixed or imbedded in optical wand 2 with optical wand.
Described optical wand 2 is from square rod or cone rod, and the cross section of optical wand is rectangle or regular polygon, and material is glass
Or plastics.
The left side of described beam dividing lens 3 has a spacing less than 3mm, the beam dividing lens with the exit facet of optical wand 2
The face relative with optical wand is plane or cambered surface.
The left side of described beam dividing lens 3 is connected as a single entity with optical wand 2, and the face that the beam dividing lens are connected with optical wand is flat
Face.
Described LCoS micro display chips 7 are LCD, CF-LCoS or CS-LCoS of transmission-type.
Described LED illumination light source 1 is the LED light source of planar package.
The LED illumination light source 1 of described planar package is the White-light LED chip of single, or by the color of red, green, blue three
Single LEDs that luminescence chip is constituted, or red R, green G, tri- independent monochromatic LEDs of indigo plant B are illuminated simultaneously.
Further details of elaboration is made to present invention etc. below in conjunction with principle and embodiment.
Fig. 1-1 gives the light nose schematic diagram that two dimension imaginary light source array is formed, and the two dimension that Fig. 1-2 gives light nose is empty
The specific distribution situation of light source.For optical wand 2, simplest method is exactly to judge to be passed in optical wand 2 by image method
Which specific light source defeated a certain bar light comes from.The method shows the light sent by actual LED illumination light source 1
Reflection light after being reflected through the inwall of optical wand 2 is directly sent not being geometrically equivalent to the corresponding a certain imaginary light source of direct slave phase
The light of deviation.As shown in Fig. 1-1,1-2, by taking a rectangular shaped light source for uniformly light-emitting as an example, sent out by actual LED illumination light source 1
The vignette line S1D that the inwall reflection through optical wand 2 for going out light AD once is sent with corresponding imaginary light source S2 is of equal value, and
The light S2D directly sent by imaginary light source S2 is equivalent to through the inwall of optical wand 2 reflection light CD twice.Illuminating ray is in optical wand
Multiple total reflection in 2 vertical direction between two inwalls can produce longitudinal linear light sorurce virtual image array, and illuminating ray is along level
Multiple total reflection can produce horizontal linear light sorurce virtual image array between the inwall of optical wand two in direction.Therefore, by LED illumination light source 1
The light for sending can form shown two-dimentional imaginary light source array after 2 four multiple total reflections of inwall of optical wand.
Fig. 2 is the size relationship figure between LED illumination light source and light plane rod end.For the LED illumination light source 1 that has given and
Speech, the ranks spacing of two-dimentional imaginary light source array changes with the change of optical wand face size, the chi of LED illumination light source 1
A very little timing, the size in the section of optical wand 2 is bigger, and the interval in the two-dimentional imaginary light source array for being formed between adjacent imaginary light source is also got over
Greatly.Can according to actual needs, the sectional dimension to optical wand 2 carries out reasonable selection, to adjacent in above-mentioned two-dimentional imaginary light source array
Distance is controlled between imaginary light source.Sectional dimension to optical wand 2 need to carry out reasonable selection, so as to above-mentioned two-dimentional imaginary light source array
In distance between adjacent imaginary light source control effectively.As shown in Figure 2, with reference to practical application request, between adjacent imaginary light source
Distance need to meet requirement：W >=c then a=c+w >=2c；H >=d then b=d+h >=2d.Wherein：A, b are respectively the length of optical wand cross-section end surfaces
And width, c, d is respectively the length and width of LED chip light-emitting area, and w, h is respectively between actual LED illumination light source and adjacent imaginary light source
Lateral separation and fore-and-aft distance.As shown in Figure 2, left-hand component is in figure, the phase between optical wand incident end face and LED illumination light source
To position and size relationship；Right-hand component is in figure, the position relationship between actual LED light source and adjacent imaginary light source.Optical wand 2 is grown
Degree determines the scope of the two-dimentional imaginary light source array for being formed.Because the length of optical wand 2 is more long, order of reflection of the light in optical wand 2
More, correspondingly produced two-dimentional imaginary light source array range is bigger.
As shown in figure 3, the light classical prescription bar system that LED illumination light source 1 sends is by the optical schematic diagram of beam splitting shaping, wherein
S1It is actual LED illumination light source, S1、S-1The virtual image obtained after being once totally reflected through optical wand inwall by actual LED illumination light source,
First from the even smooth principle of optical wand 2 represented by Fig. 1-1, can be formed on the incident end face of optical wand 2 and arranged according to certain rules
The two-dimentional vignette array of cloth, actual LED illumination light source is only simply chosen herein and its in optical wand by being once totally reflected
The two-dimension light source array of the imaginary light source composition for being formed is analyzed explanation, be can see from the optic path situation of diagram, shines
Mingguang City's line is by 3 pairs of re-imagings of the two-dimentional imaginary light source array of beam dividing lens, the beamlet array that can be separate, so that real
Now to the segmentation shaping of illuminating ray, and collection by follow-up relay lens group 5 is delivered to up to LCoS micro display chips 7
On.
After the light that Fig. 4 is sent for LED illumination light source is through optical wand and beam dividing lens beam splitting shaping, and carried out at beam-splitting surface
The index path of polarised light conversion, square rod system first as shown in Figure 3 understands for the segmentation shaping principle of light beam, by beam splitting
The two-dimentional imaginary light source array that lens 3 are pointed to the front end of optical wand 2 is imaged so that illuminating ray is successfully split,
Produce separate two-dimentional beamlet array.We can add matched polarised light to turn on the beam-splitting surface of illuminating ray
Changing system 4 carries out polarised light conversion so that illumination light has just all been changed in order to same before continuing relay lens group 5 after entering
A kind of polarised light of polarization state.
Fig. 5-1 gives the Illumination Distribution situation and polarised light of the beamlet array that illuminating ray is produced after beam splitting shaping
Corresponding relation between converting system position.Fig. 5-2 is the space three-dimensional structure schematic diagram of polarization conversion system.From Fig. 5's -1
It can be seen that the beamlet battle array of illuminating ray formation after the shaping of beam dividing lens 3 segmentation that LED illumination light source 1 sends in illumination figure
The concrete form and arranging situation of row, arrangement according to spot array in beam-splitting surface illumination figure we can add phase in beam-splitting surface
The array being made up of many sub- PBS prisms 41 of matching carries out polarization light multiplexing well.Be also show partially in figure simultaneously
The space structure of light converting system 4 of shaking, can clearly be seen that polarization conversion system 4 is by a series of sub- PBS ribs from figure
The array of mirror 41 and the composition of half-wave plate 42 being spaced apart.
Fig. 6 is the polarised light transfer principle figure of polarization conversion system 4, every diagonal oblique section of sub- PBS prisms 41
On be coated with polarizing coating of the reflection S light through P light.Polarization conversion system has two kinds of forms, and one kind is all to change natural light
It is P light, as shown in Fig. 6 left parts, illumination light is by being divided into two kinds of polarization states of S states and P states after sub- PBS prisms 41
Light, P light is directed through, and the light of S states is then reflected into adjacent sub- PBS prisms 41 and then outgoing again, in corresponding S light
Exit facet gluing connects half-wave plate 42, the S state polarised lights of outgoing is converted to the polarised light of P states, so as to changed by polarised light be
The light of 4 outgoing of uniting is totally converted for P light, otherwise then has the polarization conversion system 4 under another form, as：Given in Fig. 6
The illustrated case of the right part for going out, half-wave plate 42 is glued on the exit facet in sub- PBS prisms through P light, by the conversion of P light
It is S-polarization light, and the S light of original outgoing then remains in that S-polarization state is constant, so as to illumination light all to be switched to S-polarization light,
Polarised light transformation needed for realizing.
Fig. 7 gives described by R, the single adjustable LED illumination light source of colour gamut that G, B three-colour light-emitting chip are constituted
A kind of 1 structural representation, this LED illumination light source 1 contains red, green, green, blue four luminescence chips, and four chips are all encapsulated in one
On LEDs, wherein two panels Green Chip is located at cornerwise position, and four luminescence chips can respectively drive luminous, Ke Yitong
Overregulate its each respective driving current of chip to control its luminous intensity, so as to reach the mesh of the light colour gamut after regulation synthesis
's.
Fig. 8 is given using the single LEDs illumination being made up of red, green, blue three-colour light-emitting chip based on the inclined of optical wand
The schematic diagram of light multiplexing of shaking micro-optical automotive engine system embodiment one, is sequentially provided with along the light direction of propagation：LED illumination light source 1, light
Rod 2, beam dividing lens 3, polarization conversion system 4, relay lens group 5, PBS devating prisms 6, LCoS micro display chips 7 and into
As projection objective or eyepiece 8.Here optical wand 2 uses square optical wand, and LCoS micro display chips 7 use CS-LCoS.
The light that LED illumination light source 1 sends is directly over optical wand 2 and carries out even smooth colour mixture, and adjusting the electric current of each chip can control it to send out
Luminous intensity, such that it is able to adjust the colour gamut of the outgoing end face emergent light of optical wand 2, obtains the photograph matched with LCoS micro display chips 7
It is bright to use white light.The light that LED illumination light source 1 sends on the incident end face of optical wand 2 by after the multiple reflections in optical wand 2, forming
The light source virtual image array arranged according to certain rules, the two-dimentional imaginary light source array carries out secondary imaging by beam dividing lens 3 again, realizes
The segmentation shaping of illuminating ray, produces separate beamlet array.And polarization conversion system 4 is added at the beam-splitting surface, enter
Row polarised light is changed so that the natural light sent from LED illumination light source 1 is all converted to the polarised light of same polarization state, to reach
To the purpose of polarization light multiplexing, illumination target face is transferred to through the collection of follow-up relay lens group 5 from the polarised light of PCS outgoing
On LCoS micro display chips 7.The even light action of optical wand 2 makes the light that LED illumination light source 1 sends shape on the outgoing end face of optical wand 2
Into uniform distribution, beam dividing lens 3 are realized the optical wand 2 of uniform illumination herein with the entirety that relay lens group 5 is constituted
Outgoing end face amplify image on LCoS faces by a certain percentage, form the size and light angle with LCoS micro display chips 7
The Uniform Illumination hot spot for matching, the image on LCoS micro display chips 7 is illuminated and is entered by projection object lens or eyepiece 8
Row projection imaging.
Fig. 9 is given using the single polarization light multiplexing micro-optical automotive engine system reality based on optical wand of White-light LED illumination
The schematic diagram of example two is applied, is sequentially provided with along the light direction of propagation：LED illumination light source 1, optical wand 2, the conversion of beam dividing lens 3, polarised light
System 4, relay lens group 5, PBS devating prisms 6, LCoS micro display chips 7 and projection object lens or eyepiece 8.Here
Optical wand 2 uses tapered light pipes, and LCoS micro display chips 7 use CF-LCoS.The light that LED illumination light source 1 sends is direct
Into optical wand 2, angle that can be preferably to illuminating ray by the cone angle for adjusting optical wand 2 is controlled, due to illuminating ray
By certain two-dimension light source virtual image arranged after multiple reflection, even light, can be produced on the incident end face of optical wand 2 in optical wand 2
Array, the imaginary light source array picture carries out secondary imaging by beam dividing lens 3 again, to realize the beam splitting shaping to illuminating ray, meeting
The beamlet array of two dimension is produced, and polarization conversion system 4 is added on the beam-splitting surface, will be sent by LED illumination light source 1
Light be all converted to the polarised light of same polarization state, the purpose of polarization light multiplexing is reached, from the outgoing of polarization conversion system 4
Polarised light is transferred on LCoS micro display chips 7 by the collection of follow-up relay lens group 5, and is obtained and LCoS micro display cores
The illumination spot that piece 7 matches, the image on LCoS micro display chips 7 is illuminated, then is entered by projection object lens or eyepiece 8
Row projection imaging.
Figure 10 gives micro- by the polarization light multiplexing based on optical wand of red, green, blue this three single LED illuminations
The schematic diagram of type optical engine system embodiment three, red, green, blue three-color LED lighting source is set gradually along the light direction of propagation
1, optical wand 2, beam dividing lens 3, X-Cube color-combination prisms 9, polarization conversion system 4, relay lens group 5, PBS devating prisms 6,
LCoS micro display chips 7, projection object lens or eyepiece 8.Here optical wand 2 uses square optical wand, LCoS micro display cores
Piece 7 uses CS-LCoS.It is divided into three light paths, single green, single red and single blue led along the light direction of propagation
The red, green, blue three coloured light sent on lighting source 1 respectively enters corresponding optical wand 2, by integrating optical wand in respective light path
After the even light of multiple reflections, uniform emergent light is formed on corresponding square rod outgoing end face, the front end of optical wand 2 in each light path
A two-dimentional imaginary light source array is all corresponded to, corresponding beam dividing lens 3 carry out secondary imaging to respective imaginary light source array respectively, real
Now to the segmentation shaping of illuminating ray, the road light of red, green, blue three carries out conjunction color by X-Cube color-combination prisms 9, and X-Cube closes color rib
Mirror 9 has plated two parts optical thin film, and a part is reflection feux rouges, transmits the film of blue green light, and another part is reflection blue light transmission
The film of red-green glow.After such three road light synthesizes through X-Cube color-combination prisms 9, required white light is can obtain, and add at beam-splitting surface
Enter the polarization conversion system 4 for matching, complete polarised light conversion, in being passed through subsequently again by the light of the outgoing of polarization conversion system 4
After lens group 5 collection and be passed through PBS devating prisms 6 and reach on LCoS micro display chips 7, obtain and LCoS micro displays
The flat-white illumination spot that chip 7 matches, the hot spot illuminates the image of micro display chip, the image needed for being formed, so
The image is amplified by imaging by projection object lens or eyepiece 8 again afterwards.
Above example, only illustrates technical characteristic of the invention and exploitativeness, its object is to make the skill in the field
Art personnel will appreciate that present disclosure and be practiced, although being described to the present invention by reference to specific embodiment,
It is that these descriptions should not be interpreted as a kind of limiting situation, it is obvious with reference to above description for a person skilled in the art
Can make to the various improvement in open embodiment and additional embodiment of the invention, it is all to be made under this invention's idea
Conversion, belong to protection scope of the present invention.
Claims (10)
1. a kind of polarised light multiplexed imaging method based on optical wand, it is characterised in that：The illuminating ray that LED illumination light source sends leads to
Cross non imaging optical element optical wand, beam dividing lens and polarization conversion system are whole to realize even light to illuminating ray, beam splitting
Shape and polarised light are changed, and collection by subsequent relay system is delivered to up to LCoS micro display chips, forms uniform photograph
Mingguang City's spot, the illumination spot illuminates the image of LCoS micro display chips, the image needed for being formed, and then polarizes rib by PBS
The image is carried out projection imaging by mirror, projection object lens or eyepiece；
Wherein, described LED illumination light source is single channel or multichannel；
Wherein, described optical wand as two-dimentional imaginary light source array generating source, beam dividing lens are to being formed at the two dimension of light nose
Imaginary light source array carries out reimaging, to obtain the beamlet array being separated from each other, and in the beam-splitting surface addition correspondence of illuminating ray
Polarization conversion system, so as to realize the conversion of polarised light.
2. a kind of polarization light multiplexing micro-optical automotive engine system based on optical wand using method as claimed in claim 1, it is special
Levy and be：Along the light direction of propagation set gradually for：LED illumination light source without optical shaping（1）, optical wand（2）, beam dividing lens
（3）, polarization conversion system（4）, relay lens group（5）, PBS devating prisms（6）, LCoS micro display chips（7）And imaging
Projection objective or eyepiece（8）.
3. the polarization light multiplexing micro-optical automotive engine system based on optical wand according to claim 2, it is characterised in that enter
Step is provided with X-Cube color-combination prisms（9）, work as LED illumination light source（1）During for multichannel, per all the way respectively through respective optical wand
（2）, beam dividing lens（3）, by X-Cube color-combination prisms（9）Conjunction color is carried out, subsequently into polarization conversion system（4）.
4. the polarization light multiplexing micro-optical automotive engine system based on optical wand according to claim 2, it is characterised in that described
LED illumination light source（1）Light extraction side and optical wand（2）Between there is a spacing less than 3mm.
5. the polarization light multiplexing micro-optical automotive engine system based on optical wand according to claim 2, it is characterised in that described
LED illumination light source（1）Light extraction side and optical wand be affixed or imbed optical wand（2）It is interior.
6. the polarization light multiplexing micro-optical automotive engine system based on optical wand according to claim any one of 2-5, its feature
It is, described optical wand（2）From square rod or cone rod, and the cross section of optical wand is rectangle or regular polygon, and material is glass
Or plastics.
7. the polarization light multiplexing micro-optical automotive engine system based on optical wand according to claim any one of 2-5, its feature
It is, described beam dividing lens（3）Left side and optical wand（2）Exit facet has a spacing less than 3mm, the beam dividing lens
The face relative with optical wand is plane or cambered surface.
8. the polarization light multiplexing micro-optical automotive engine system based on optical wand according to claim any one of 2-5, its feature
It is, described beam dividing lens（3）Left side and optical wand（2）It is connected as a single entity, the face that the beam dividing lens are connected with optical wand is flat
Face.
9. the polarization light multiplexing micro-optical automotive engine system based on optical wand according to claim 2-5, it is characterised in that institute
The LCoS micro display chips stated（7）It is LCD, CF-LCoS or CS-LCoS of transmission-type.
10. the polarization light multiplexing micro-optical automotive engine system based on optical wand according to claim 2-5, it is characterised in that
Described LED illumination light source（1）It is the LED light source of planar package, the LED illumination light source of described planar package（1）It is single
White-light LED chip, or single LEDs being made up of the luminescence chip of the color of red, green, blue three, or red (R), green (G),
Blue (B) three independent monochromatic LEDs are illuminated simultaneously.
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| CN201611150543.7A CN106707668A (en) | 2016-12-14 | 2016-12-14 | Polarized light reuse imaging method and micro optical engine system based on optical wand |
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| CN201611150543.7A CN106707668A (en) | 2016-12-14 | 2016-12-14 | Polarized light reuse imaging method and micro optical engine system based on optical wand |
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Application publication date: 20170524 |