CN101221289B - Multi-primary color image combination synthesizer - Google Patents

Abstract

The invention provides a multi-fundamental color image combination synthesizer which includes a main prism and at least one correcting prism arranged on each incident direction. The main prism is a polygon and includes a positive incident surface, a plurality of beam spitting surfaces and an exiting surface. The main prism is used for forming the light injected in the main prism from the positive incident surface and the beam splitting surface into a light path from the positive incident surface to the exiting surface. The light path generates full reflection on the location of each beam splitting surface. The correcting prisms are all provided with an incident surface and an exiting surface. The incident light which is injected from the positive incident surface directly and vertically injects into the positive incident surface. The incident light in other incident directions injects into the incident surface of one of at least one correcting prism and injects out from the exiting surface of the correcting prisms, then injects into the beam splitting surface corresponding to the correcting prisms and synthesizes in the main prism along the incident light of each incident direction, and finally injects out from the exiting surface of the main prism; wherein, the exiting surface of the correcting prism is mutually parallel to the beam splitting surface corresponding to the correcting prism. An image with a more realistic color can be obtained by the synthesizer of the invention.

Description

Multi-primary color image combination synthesizer

Technical field

The present invention relates to a kind of optical device, relate in particular to a kind of multi-primary color image combination synthesizer.

Background technology

As everyone knows, in the display of red, green, blue three looks as primary colours, image synthesizer is wherein requisite device.There has been multiple beam synthesizing device in this area.But these devices respectively have length.For example, Fig. 1 discloses the X prism that generally adopts in the present projector.Different wave length (λ ₁, λ ₂, λ ₃) monochromatic light inject this prism from three directions respectively, and from the four direction of this prism stack output.But under the situation that will import more primary colours, this prism obviously can not meet the demands.In addition, among the Chinese invention patent No.93109784.3 a kind of laser beam combining unit is disclosed.This device has utilized the feature that the light beam of different polarization states can be synthesized of calcite crystal.But, the polarization state of light beam of input there is special requirement according to the principle of this device.Thus, though the synthesizer kind of prior art is a lot, certain limitation is arranged all.

Just developing display system now based on many primary colours (primary colours more than three kinds).The increase of number of primary colors means that the reductibility of color of image is better, and display effect is better.Fig. 2 A and 2B show the demonstration colour gamut under three primary colours and the nine primary colours conditions respectively.Comparison by Fig. 2 A and 2B can be seen, the more approaching true colour gamut that needs reduction of the colour gamut of nine primary colours.Yet, because display system in the past mainly based on three primary colours (RGB), therefore fails to provide the image synthesizer that is suitable for this many primary display system.

Patent document 1: Inst. of Physics, CAS is in the patented claim of 2004/07/16 title of submitting to for " a kind of have red, green, blue tricolor laser colour display device ", application number: 200410069055.", these multi-primary color image synthesizers can't realize problem to the transition of many primary colours laser display because mainly being the present existing tricolor laser display device of solution.

Summary of the invention

The object of the present invention is to provide a kind of compositor that is used for multi-primary color image.

The invention provides a kind of multi-primary color image combination synthesizer, it comprise headprism and be arranged on each incident direction at least one revise prism.Headprism is polygon and comprises a normal incidence face, a plurality of beam-splitting surface and an exit facet, the light that headprism is used for going into to inject headprism from normal incidence face and beam-splitting surface forms the light path from the normal incidence face to exit facet, and this light path at each beam-splitting surface place total reflection takes place.Revise prism and all comprise a plane of incidence and an exit facet.The incident light of injecting from the normal incidence face directly vertically incides the normal incidence face.The incident light of other incident direction is then injected at least one plane of incidence of revising one of prism and is penetrated from its exit facet, incide subsequently and the corresponding beam-splitting surface of this correction prism, incident light along each incident direction is synthetic in headprism, penetrate from the exit facet of headprism at last, the exit facet of wherein revising prism be parallel to each other with the corresponding beam-splitting surface of this correction prism.

According to a kind of embodiment, except that first beam-splitting surface, all beam-splitting surfaces are identical with respect to the sense of rotation of last beam-splitting surface.According to another kind of embodiment, except that first beam-splitting surface and last beam-splitting surface, a back beam-splitting surface of at least one beam-splitting surface is different with its sense of rotation with respect to last beam-splitting surface with respect to its sense of rotation.

In addition, each size of revising the angle of the plane of incidence of prism and exit facet is determined according to the angle between each corresponding beam-splitting surface of headprism.

In addition, each prism of multi-primary color image combination synthesizer of the present invention is made of in isotropic material, negative crystal and the positive crystal any.

In addition, multi-primary color image combination synthesizer of the present invention also comprises and turns to prism before the exit facet that is arranged at headprism.

Can obtain color image more true to nature by compositor of the present invention.

Should be appreciated that the above generality of the present invention is described and the following detailed description all is exemplary and explanat, and be intended to the further explanation that the invention provides for as claimed in claim.

Description of drawings

Comprise that accompanying drawing is for providing the present invention further to be understood, they are included and are constituted the application's a part, and accompanying drawing shows embodiments of the invention, and play the effect of explaining the principle of the invention with this instructions.In the accompanying drawing:

Fig. 1 is the structural representation of the X prism of prior art.

Fig. 2 A and 2B are respectively the synoptic diagram of the demonstration colour gamut of three primary colours and the demonstration of nine primary colours.

Fig. 3 A and 3B are respectively the synoptic diagram of multi-primary color image combination synthesizer according to an embodiment of the invention.

Fig. 4 A and 4B are respectively the synoptic diagram according to the multi-primary color image combination synthesizer of second embodiment of the invention.

Fig. 5 A and 5B are respectively the synoptic diagram according to the multi-primary color image combination synthesizer of third embodiment of the invention.

Fig. 6 is the synoptic diagram according to the multi-primary color image combination synthesizer of fourth embodiment of the invention.

Fig. 7 is the synoptic diagram according to the multi-primary color image combination synthesizer of fifth embodiment of the invention.

Embodiment

Now with embodiments of the present invention will be described by referring to the drawings in detail.

Fig. 3 A is the synoptic diagram of multi-primary color image combination synthesizer according to an embodiment of the invention.

As shown in Figure 3A, multi-primary color image combination synthesizer of the present invention comprises irregular polygon headprism A, is arranged at the correction prism A on each incident direction ₁, A ₂, A ₃, A ₄And turn to prism B.Alphabetical represented limit identical among the figure has identical geometric properties.Dotted line is a boost line.Among the figure, 1., 2., 3., 4., 5. represent incident direction.The width of s ' expression primary color image.Prism A, A shown in the figure ₁, A ₂, A ₃, A ₄Building material identical, be isotropic medium; The building material that turns to prism B is isotropic medium, this medium can with prism A, A ₁, A ₂, A ₃, A ₄Used material difference, but the refractive index of the light that the material that must guarantee to turn to prism B in visible-range shows any participation all greater than

).Each is provided with optical path compensator D before revising prism, and this optical path compensator D must not change light path.Headprism A is polygon and comprises a normal incidence face (rs) and a plurality of beam-splitting surface (bc), (df), (hg), (pq).Beam-splitting surface be defined as one of prism A can total reflection prism A in the prism facets of part light of light path.

Wherein, the incident light of injecting from normal incidence face (rs) directly vertically incides this normal incidence face (rs), and the incident light of other direction is injected correction prism A ₁, A ₂, A ₃, A ₄One of the plane of incidence and penetrate from its exit facet, incide subsequently and one of the corresponding a plurality of beam-splitting surfaces of this correction prism (bc), (df), (hg), (pq), incident light along each incident direction is synthetic in headprism A, and the exit facet (av) from headprism A penetrates at last.After this, impinge perpendicularly on the plane of incidence that turns to prism B and penetrate perpendicular to its exit facet.Wherein, the exit facet of revising prism be parallel to each other with its corresponding beam-splitting surface, for example

In the present embodiment, preferred satisfied following geometric condition:

1, boost line explanation:

And with

Intersect at a w ₁,

And with

Intersect at a w ₂,

And with

Intersect at a w ₃,

And with Intersect at a w ₄,

And with Intersect at a w ₅

2, prism A, A ₁, A ₂, A ₃, A ₄Seamed edge: av is vertical with emergent light,

Rs is perpendicular to the incident light direction from 5. incident; Ab, cd, fg, hp, qr, st, tu, uv,

Do not require, but do not influence at prism A, A ₁, A ₂, A ₃, A ₄In light path.

3, prism A, A ₁, A ₂, A ₃, A ₄Angle:

(1) prism A: ∠ aw ₁B=π-θ ₁, ∠ cw ₂D=π-θ ₂, ∠ fw ₃G=π-θ ₃, ∠ hw ₄P=π-θ ₄,

∠qw ₅r＝π-θ ₅；

(2) prism A ₁: ∠ x ₁y ₁z ₁=π-θ ₁

(3) prism A ₂: ∠ x ₂y ₂z ₂=θ ₁-θ ₂=(π-θ ₂)-(π-θ ₁);

(4) prism A ₃: ∠ x ₃y ₃z ₃=π-θ ₃+ θ ₂-θ ₁=(π-θ ₃)-[(π-θ ₂)-(π-θ ₁)

(5) prism A ₄:

∠x ₄y ₄z ₄＝θ ₁-θ ₂+θ ₃-θ ₄＝(π-θ ₄)-{(π-θ ₃)-[(π-θ ₂)-(π-θ ₁)]}；

4, the seamed edge of prism B: yz is vertical with incident light, and xz is vertical with emergent light.

5, the angle of prism B: ∠ xyz=θ.

How below describe in detail utilizes device of the present invention to realize the purpose of composograph of the present invention.

Suppose to show that required number of primary colors is N, these optical wavelength are respectively λ _i(i=1,2 ... N), at prism A, A ₁, A ₂, A ₃, A ₄Refractive index in the used isotropic medium is respectively n _i(i=1,2 ... and suppose that these light are arranged in order and are designated as again n according to refractive index is ascending N), _j(be n _J+1N _j); Refractive index in turning to the used isotropic medium of prism B is respectively $n_i^{\′}(i=\mathrm{1,2}\·\·\·\·\·\·N).$

Supposing need be from prism A _iGoing into to inject compositor light is n _j(m _I-1＜j≤m _i, m _i〉=m _I-1〉=0, i 〉=1, m ₀=0, mi is a positive integer, 1≤i≤u≤N, m _u≤ N, u represent last beam-splitting surface), the refractive index of supposing air is n ₀

Each relevant angle preferably meets the following conditions among 1}, the headprism A:

1, the effect of beam-splitting surface mainly contains:

The image of composite part primary colours: (as figure, beam-splitting surface (bc), (df), (gh), (pq))

s＝m _i+1，t＝m _i，i≤u [1]；

Wherein u represents last beam-splitting surface, and the refractive index of air is n ₀

2,5. enter headprism A (as figure, normal incidence face (rs)) from incident direction:

Wherein u represents last beam-splitting surface.

2}, on i beam-splitting surface:

n _k＝n _j，n _k<n _k+1，

1≤k≤(m _i-m _i-1)，m _i-1<j≤m _i，i≤u [3]；

Wherein u represents last beam-splitting surface, and the refractive index of air is n ₀

3}, offset distance:

1, i the beam-splitting surface that has only a kind of light incident of wavelength revised prism A _iAnd the distance H between i the beam-splitting surface of headprism A _iPreferred satisfied:

H _i>0，1≤i≤N [4]；

The correction prism A of light incident that 2, two or more wavelength is arranged _iAnd the distance H between i the beam-splitting surface of headprism A _{I, k}(H _{I, k}0, m _I-1＜j≤m _i, k 〉=2, k is a positive integer), for all from revising prism A _iIncident is (promptly from incident direction

Incident, 1≤i≤u, u represent last beam-splitting surface) the primary color image of light of different wave length and the offset distance of compound direction be:

1≤i≤N，1≤k<(k+1)≤(m _i-m _i-1) [5]；

So from same correction prism A _iOffset distance between two kinds of adjacent different primary color images of incident is:

Δd _i，k＝|d _i，k+1-d _i，k|，

1≤i≤N，1≤k<(k+1)≤(m _i-m _i-1) [6]；

As Δ d _{I, k}((Δ d during 〉=s _{I, k}-s) 〉=0), separate in the space during each primary color image incident, and through reaching the synthetic purpose of monochrome image of many primary colours fully at space overlap after the compositor.

Before entering compositor, incident light is used to adjust each other the phase place of light when arriving exit facet (av) of each primary colours earlier by the optical path compensation device of each primary colours correspondence.

Image enters from exit facet (av) ejaculation and from the plane of incidence (zy) and turns to prism B after will synthesizing at last, penetrates from exit facet (xz) after fully reflecting surface (xy) total reflection, turns to prism B to be mainly used in the exit direction of adjusting the image after synthesizing.

Turn to prism B the angle the preferred condition that satisfies be:

$\frac{n_0}{n_i^{\&prime;}}<\sin \mathrm{\&theta;},1\&le;i\&le;N---\left[7\right];$

The refractive index of air is n ₀, example among the figure adopts the right-angle prism of a base angle ∠ xyz=∠ yxz=θ=45 °.

In addition, be to improve the utilization factor of light, can be on the plane of incidence of each prism and exit facet the corresponding anti-reflection film of plating, to improve the transmitance of light.

In addition, for Fig. 3 A by two prism A ₄, the light of two kinds of primary colours is parallel respectively to incide two prism A ₄Situation can be applied to equally respectively revise prism among other embodiments of the invention and other embodiment.

Fig. 3 B is the synoptic diagram of multi-primary color image combination synthesizer according to an embodiment of the invention.

Fig. 3 B and Fig. 3 A have many something in common, and identical among the label of these same sections and Fig. 3 A also represented identical implication, so its description can be with reference to the situation among above-mentioned Fig. 3 A.Among Fig. 3 B, the 4th beam-splitting surface is (sr) ((sr) is the normal incidence face in the embodiment of Fig. 3 A), and the normal incidence face is (pq) ((pq) is the 4th beam-splitting surface in the embodiment of Fig. 3 A).In the present embodiment, if a back beam-splitting surface of a beam-splitting surface is different with its sense of rotation with respect to last beam-splitting surface with respect to its sense of rotation, claim that so this beam-splitting surface is critical beam-splitting surface.(first beam-splitting surface and last except), for example beam-splitting surface (gh) among Fig. 3 B.

The difference of embodiment shown in embodiment shown in Fig. 3 B and Fig. 3 A mainly is: among the embodiment of Fig. 3 A, all beam-splitting surfaces are with respect to the sense of rotation of last beam-splitting surface identical (except first beam-splitting surface); And among the embodiment of Fig. 3 B, a back beam-splitting surface of at least one beam-splitting surface is with respect to its sense of rotation different with its sense of rotation with respect to last beam-splitting surface (except first beam-splitting surface and last beam-splitting surface), such as beam-splitting surface (gh).

In the embodiment shown in Fig. 3 B, along first direction 1., 2. identical among situation and Fig. 3 A of incident of second direction.4. in the situation of incident, there is being the parallel light of two kinds of primary colours to incide same correction prism A along direction ₄The parallel light of this multiple primary colours incides same correction prism A _iThe situation that incides the i beam-splitting surface again can be applicable to respectively revise prism among other embodiments of the invention and other embodiment equally.In addition, in the present embodiment, along direction 4. the light of incident through revising prism A ₄The beam-splitting surface that enters is (sr).And along direction 5. the headprism face of the direct vertical incidence of light of incident be (pq), i.e. normal incidence face.

The synthetic number of primary colors of multi-primary color image that only can realize with a headprism in the embodiment of Fig. 3 A is limited; And the number of primary colors that the multi-primary color image that only can realize with a headprism in the embodiment of Fig. 3 B synthesizes is far more than the embodiment of Fig. 3 A.

In the present embodiment, preferred satisfied following geometric condition:

1, boost line explanation:

And with

Intersect at a w ₁,

And with

Intersect at a w ₂,

And with

Intersect at a w ₃,

And with

Intersect at a w ₅

2, prism A, A ₁, A ₂, A ₄Seamed edge: av is vertical with emergent light,

Pq is perpendicular to the incident light direction from 5. incident; Ab, cd, fg, hp, qr, st, tu, uv,

Do not require, but do not influence at prism A, A ₁, A ₂, A ₄In light path.

3, prism A, A ₁, A ₂, A ₄Angle:

(1) prism A: ∠ aw ₁B=π-θ ₁, ∠ cw ₂D=π-θ ₂, ∠ fw ₃G=π-θ ₃, ∠ rsw ₄=π-θ ₄, ∠ qw ₅R=π-θ ₅

(2) prism A ₁: ∠ x ₁y ₁z ₁=π-θ ₁

(3) prism A ₂: ∠ x ₂y ₂z ₂=θ ₁-θ ₂=(π-θ ₂)-(π-θ ₁);

(4) prism A ₄:

∠x ₄y ₄z ₄＝π-θ ₁+θ ₂-θ ₃-θ ₄＝(π-θ ₃)-[(π-θ ₂)-(π-θ ₁)]-θ ₄；

4, the seamed edge of prism B: yz is vertical with incident light, and xz is vertical with emergent light.

5, the angle of prism B: ∠ xyz=θ.

How below describe in detail utilizes device of the present invention to realize the purpose of composograph of the present invention.

Suppose to show that required number of primary colors is N, these optical wavelength are respectively λ _i(i=1,2 ... N), at prism A, A ₁, A ₂, A ₄Refractive index in the used isotropic medium is respectively n _i(i=1,2 ... and suppose that these light are arranged in order and are designated as again n according to refractive index is ascending N), _j(be n _J+1N _j); Refractive index in the used isotropic medium of prism B is respectively $n_i^{\&prime;}(i=\mathrm{1,2}\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;N).$

Supposing need be from prism A _iGoing into to inject compositor light is n _j(m _I-1＜j≤m _i, m _i〉=m _I-1〉=0, i 〉=1, m ₀=0, m _iBe positive integer, 1≤i≤u≤N, m _u≤ N, u represent last beam-splitting surface), the refractive index of supposing air is n ₀

Each relevant angle preferably meets the following conditions among 1}, the headprism A:

1, the effect of beam-splitting surface mainly contains 2 points:

(1) image of composite part primary colours: (as figure, beam-splitting surface (bc), (df), (sr))

i≠h _k+1，

i＝hk+1，

s＝m _i+1，t＝m _i，

i≤u [8]；

H wherein _kRepresent k critical beam-splitting surface, it is numbered h _k(i.e. h _kIndividual beam-splitting surface),

U represents last beam-splitting surface, and the refractive index of air is n ₀

(2) light path among the adjustment headprism A: (as figure, beam-splitting surface (gh))

i≠h _k+1，

i＝h _k+1，

r＝m _i，m _i＝m _i-1，

r≤u [9]；

Wherein u represents last beam-splitting surface, and the refractive index of air is n ₀

2,5. enter prism A (as figure, normal incidence face (rs)) from incident direction:

Wherein u represents last beam-splitting surface.

2}, on i beam-splitting surface:

n _k＝n _j，n _k<n _k+1，

i≠h _k+1，

i＝h _k+1，

1≤k≤(m _i-m _i-1)，m _i-1<j≤m _i， i≤u [11]；

Wherein u represents last beam-splitting surface, and the refractive index of air is n ₀

3}, offset distance:

1, a kind of i beam-splitting surface of light incident of wavelength only revised prism A _iAnd the distance H between i the beam-splitting surface of headprism A _iPreferred satisfied:

H _i>0，1≤i≤N [12]；

The correction prism A of light incident that 2, two or more wavelength is arranged _iAnd the distance H between i the beam-splitting surface of headprism A _{I, k}(H _{I, k}0, m _I-1＜j≤m _i, k 〉=2, k is a positive integer), for all from revising prism A _iIncident is (promptly from incident direction Incident, 1≤i≤u, u represent last beam-splitting surface) the primary color image of light of different wave length and the offset distance of compound direction be:

1≤i≤N，1≤k<(k+1)≤(m _i-m _i-1) [13]；

So from same correction prism A _iOffset distance between two kinds of adjacent different primary color images of incident is:

Δd _i，k＝|d _i，k+1-d _i，k|，

1≤i≤N，1≤k<(k+1)≤(m _i-m _i-1) [14]；

As Δ d _{I, k}((Δ d during 〉=s _{I, k}-s) 〉=0), separate in the space during each primary color image incident, and through reaching the synthetic purpose of monochrome image of many primary colours fully at space overlap after the compositor.

Before entering compositor, incident light is used to adjust each other the phase place of light when arriving exit facet (av) of each primary colours earlier by the optical path compensation device of each primary colours correspondence.

Image enters from exit facet (av) ejaculation and from the plane of incidence (zy) and turns to prism B after will synthesizing at last, penetrates from exit facet (xz) after fully reflecting surface (xy) total reflection, turns to prism B to be mainly used in the exit direction of adjusting the image after synthesizing.

Turn to prism B the angle the preferred condition that satisfies be:

$\frac{n_0}{n_i^{\&prime;}}<\sin \mathrm{\&theta;},$ 1≤i≤N [15]；

The refractive index of air is n ₀, example among the figure adopts the right-angle prism of a base angle ∠ xyz=∠ yxz=θ=45 °.

In the embodiment of Fig. 3 B, saved from the 3. situation of incident of incident direction, with this illustrate can select from above 1., 2., 3., 4., 5. any the incident direction or a plurality of incident, and can realize similarly that required image is synthetic.But be appreciated that among the embodiment of Fig. 3 B and also can increase incident direction correction prism A 3. ₃, and the condition among Fig. 3 A embodiment can continued to use realizes the technique effect in Fig. 3 A scheme.

Fig. 4 A is the synoptic diagram of multi-primary color image combination synthesizer according to another embodiment of the present invention.

The structure of the embodiment of Fig. 4 A and Fig. 3 A are basic identical, and the key distinction is each prism A, A among the embodiment of Fig. 4 A ₁, A ₂, A ₄Material be negative crystal, the material of prism B still is an isotropic material, and compares with Fig. 3 A, has saved prism A among Fig. 4 A ₃M represents prism A, A among the figure ₁, A ₂, A ₄Optical axis direction.Require the polarization of incident light direction must be parallel or in the design of this technical scheme of negative crystal perpendicular to above-mentioned optical axis direction.

Shown in Fig. 4 A, multi-primary color image combination synthesizer of the present invention comprises irregular polygon headprism A, is arranged at the correction prism A on each incident direction ₁, A ₂, A ₄And turn to prism B.Alphabetical represented limit identical among the figure has identical geometric properties.Dotted line is a boost line.Among the figure, 1., 2., 4., 5. represent incident direction.The width of s ' expression primary color image.Prism A, A shown in the figure ₁, A ₂, A ₄Building material identical, be negative crystal of the same race; The building material that turns to prism B is isotropic medium, but the refractive index of the light that the material that must guarantee to turn to prism B in visible-range shows any participation all greater than ).Each is provided with optical path compensator D before revising prism, and this optical path compensator D must not change light path.Headprism A is polygon and comprises a normal incidence face (rs) and a plurality of beam-splitting surface (bc), (df), (hg), (pq).Beam-splitting surface is defined as the prism facets of one of the prism A part light in can total reflection prism A.

Wherein, the incident light of injecting from normal incidence face (rs) directly vertically incides this normal incidence face (rs), and the incident light of other direction is injected correction prism A ₁, A ₂, A ₄One of the plane of incidence and penetrate from its exit facet, incide subsequently and one of the corresponding a plurality of beam-splitting surfaces of this correction prism (bc), (df), (pq), incident light along each incident direction is synthetic in headprism A, and the exit facet (av) from headprism A penetrates at last.After this, impinge perpendicularly on the plane of incidence that turns to prism B and penetrate perpendicular to its exit facet.Wherein, the exit facet of revising prism be parallel to each other with its corresponding beam-splitting surface, for example

In the present embodiment, preferred satisfied following geometric condition:

1, boost line explanation:

And with Intersect at a w ₁,

And with

Intersect at a w ₂,

And with

Intersect at a w ₃,

And with

Intersect at a w ₄,

And with

Intersect at a w ₅

2, prism A, A ₁, A ₂, A ₄Seamed edge: av is vertical with emergent light,

Rs is perpendicular to the incident light direction from 5. incident; Ab, cd, fg, hp, qr, st, tu, uv,

Do not require, but do not influence at prism A, A ₁, A ₂, A ₄In light path.

3, prism A, A ₁, A ₂, A ₄Angle:

(1) prism A: ∠ aw ₁B=π-θ ₁, ∠ cw ₂D=π-θ ₂, ∠ fw ₃G=π-θ ₃, ∠ hw ₄P=π-θ ₄,

∠qw ₅r＝π-θ ₅；

(2) prism A ₁: ∠ x ₁y ₁z ₁=π-θ ₁

(3) prism A ₂: ∠ x ₂y ₂z ₂=θ ₁-θ ₂=(π-θ ₂)-(π-θ ₁);

(4) prism A ₄:

∠x ₄y ₄z ₄＝θ ₁-θ ₂+θ ₃-θ ₄＝(π-θ ₄)-{(π-θ ₃)-[(π-θ ₂)-(π-θ ₁)]}；

4, the seamed edge of prism B: yz is vertical with incident light, and xz is vertical with emergent light.

5, the angle of prism B: ∠ xyz=θ.

How below describe in detail utilizes device of the present invention to realize the purpose of composograph of the present invention.

Suppose to show that required number of primary colors is N, these optical wavelength are respectively λ _i(i=1,2 ... N), at prism A, A ₁, A ₂, A ₄The o light in the used negative crystal and the principal refractive index of e light are respectively n _OiAnd n _Ei(i=1,2 ... N) (n in negative crystal _OiN _Ei), so the total 2N kind incident mode (polarization direction is perpendicular or parallel in optical axis) of the demonstration of N kind primary colours guarantees under the condition of N kind display primary that (the kind mode of N≤m≤2N) also is arranged in order and is designated as again n according to refractive index is ascending to filter out m _j(be n _J+1N _j); Refractive index in the used isotropic medium of prism B is respectively $n_i^{\&prime;}(i=\mathrm{1,2}\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;N).$

If n _jThe expression wavelength is λ _iThe principal refractive index n of light corresponding o light in the used negative crystal of prism _Oi, it is vertical with optical axis direction to require incident light must satisfy the polarization direction so in the design before entering headprism A, if light needs earlier through revising prism A _iEnter headprism A again, entering correction prism A so _iMake the polarisation of light direction vertical with optical axis direction before; If n _jBeing expressed as wavelength is λ _iThe principal refractive index n of light corresponding e light in the used negative crystal of prism _Ei, must to satisfy the polarization direction parallel with optical axis direction entering headprism A to require incident light so in the design, if light needs earlier through revising prism A _iEnter headprism A again, entering correction prism A so _iMake the polarisation of light direction parallel with optical axis direction before.

Supposing need be from revising prism A _iThe light of going into to inject compositor is n _j(m _I-1＜j≤m _i, m _i〉=m _I-1〉=0, i 〉=1, m ₀=0, m _iBe positive integer, 1≤i≤u≤N, m _u≤ N, u represent last beam-splitting surface), the refractive index of supposing air is n ₀

Among 1}, the headprism A relevant each angle the preferred condition that satisfies be:

1, the effect of beam-splitting surface mainly contains 2 points:

(1) image of composite part primary colours: (as figure, beam-splitting surface (bc), (df), (pq))

s＝m _i+1，t＝m _i，i≤u [16]；

Wherein u represents last beam-splitting surface, and the refractive index of air is n ₀

(2) light path among the adjustment headprism A: (as figure, beam-splitting surface (gh))

r＝m _i，m _i＝m _i-1，r≤u [17]；

Wherein u represents last beam-splitting surface, and the refractive index of air is n ₀

2,5. enter headprism A (as figure, normal incidence face (rs)) from incident direction:

Wherein u represents last beam-splitting surface.

2}, on i beam-splitting surface:

n _k＝n _j，n _k<n _k+1，

1≤k≤(m _i-m _i-1)，m _i-1<j≤m _i，i≤u [19]；

Wherein u represents last beam-splitting surface, and the refractive index of air is n ₀

3}, offset distance:

1, i the beam-splitting surface that has only a kind of light incident of wavelength revised prism A _iAnd the distance H between i the beam-splitting surface of headprism A _iPreferred satisfied:

H _i>0，1≤i≤N [20]；

The correction prism A of light incident that 2, two or more wavelength is arranged _iAnd the distance H between i the beam-splitting surface of headprism A _{I, k}(H _{I, k}0, m _I-1＜j≤m _i, k 〉=2, k is a positive integer), for all from revising prism A _iThe primary color image of the light of the different wave length of incident (promptly from 1. incident of incident direction, 1≤i≤u, u represent last beam-splitting surface) and the offset distance of compound direction are:

1≤i≤N，1≤k<(k+1)≤(m _i-m _i-1) [21]；

So from same correction prism A _iOffset distance between two kinds of adjacent different primary color images of incident is:

Δd _i，k＝|d _i，k+1-d _i，k|，

1≤i≤N，1≤k<(k+1)≤(m _i-m _i-1) [22]；

As Δ d _{I, k}((Δ d during 〉=s _{I, k}-s) 〉=0), separate in the space during each primary color image incident, and through reaching the synthetic purpose of monochrome image of many primary colours fully at space overlap after the compositor.

Before entering compositor, incident light is used to adjust each other the phase place of light when arriving exit facet (av) of each primary colours earlier by the optical path compensation device of each primary colours correspondence.

Image enters from exit facet (av) ejaculation and from the plane of incidence (zy) and turns to prism B after will synthesizing at last, penetrates from exit facet (xz) after fully reflecting surface (xy) total reflection, turns to prism B to be mainly used in the exit direction of adjusting the image after synthesizing.

Turn to prism B the angle the preferred condition that satisfies be:

$\frac{n_0}{n_i^{\&prime;}}<\sin \mathrm{\&theta;},1\&le;i\&le;N---\left[23\right];$

The refractive index of air is n ₀, example among the figure adopts the right-angle prism of a base angle ∠ xyz=∠ yxz=θ=45 °.

In addition, for Fig. 4 A by two prism A ₄, the light of two kinds of primary colours is parallel respectively to incide two prism A ₄Situation can be applied to equally respectively revise prism among other embodiments of the invention and other embodiment.

Fig. 4 B is the synoptic diagram of multi-primary color image combination synthesizer in accordance with another embodiment of the present invention.

Fig. 4 B and Fig. 4 A have many something in common, and identical among the label of these same sections and Fig. 3 A also represented identical implication, so its description can be with reference to the situation among above-mentioned Fig. 4 A.Among Fig. 4 B, the 4th beam-splitting surface is (sr) ((sr) is the normal incidence face in the embodiment of Fig. 4 A), and the normal incidence face is (pq) ((pq) is the 4th beam-splitting surface in the embodiment of Fig. 4 A).In the present embodiment, if a back beam-splitting surface of a beam-splitting surface is different with its sense of rotation with respect to last beam-splitting surface with respect to its sense of rotation, claim that so this beam-splitting surface is critical beam-splitting surface.(first beam-splitting surface and last except), for example beam-splitting surface (gh) among Fig. 4 B.

The difference of embodiment shown in embodiment shown in Fig. 4 B and Fig. 4 A mainly is: among the embodiment of Fig. 4 A, all beam-splitting surfaces are with respect to the sense of rotation of last beam-splitting surface identical (except first beam-splitting surface); And among the embodiment of Fig. 4 B, a back beam-splitting surface of at least one beam-splitting surface is with respect to its sense of rotation different with its sense of rotation with respect to last beam-splitting surface (except first beam-splitting surface and last beam-splitting surface), such as beam-splitting surface (gh).

In the embodiment shown in Fig. 4 B, along first direction 1., 2. identical among situation and Fig. 4 A of incident of second direction.4. in the situation of incident, there is being the parallel light of two kinds of primary colours to incide same correction prism A along direction ₄The parallel light of this multiple primary colours incides same correction prism A _iThe situation that incides the i beam-splitting surface again can be applicable to respectively revise prism among other embodiments of the invention and other embodiment equally.In addition, in the present embodiment, along direction 4. the light of incident through revising prism A ₄The beam-splitting surface that enters is (sr).And along direction 5. the headprism face of the direct vertical incidence of light of incident be (pq), i.e. normal incidence face.

The synthetic number of primary colors of multi-primary color image that only can realize with a headprism in the embodiment of Fig. 4 A is limited; And the number of primary colors that the multi-primary color image that only can realize with a headprism in the embodiment of Fig. 4 B synthesizes is far more than the embodiment of Fig. 4 A.

In the present embodiment, the preferred satisfied following geometric condition of device:

1, boost line explanation:

And with

Intersect at a w ₁,

And with

Intersect at a w ₂, And with

Intersect at a w ₃,

And with

Intersect at a w ₅

2, prism A, A ₁, A ₂, A ₄Seamed edge: av is vertical with emergent light,

Pq is perpendicular to the incident light direction from 5. incident; Ab, cd, fg, hp, qr, st, tu, uv,

Do not require, but do not influence at prism A, A ₁, A ₂, A ₄In light path.

3, prism A, A ₁, A ₂, A ₄Angle:

(1) prism A: ∠ aw ₁B=π-θ ₁, ∠ cw ₂D=π-θ ₂, ∠ fw ₃G=π-θ ₃, ∠ rsw ₄=π-θ ₄,

∠qw ₅r＝π-θ ₅；

(2) prism A ₁: ∠ x ₁y ₁z ₁=π-θ ₁

(3) prism A ₂: ∠ x ₂y ₂z ₂=θ ₁-θ ₂=(π-θ ₂)-(π-θ ₁);

(4) prism A ₄:

∠x ₄y ₄z ₄＝π-θ ₁+θ ₂-θ ₃-θ ₄＝(π-θ ₃)-[(π-θ ₂)-(π-θ ₁)]-θ ₄；

4, the seamed edge of prism B: yz is vertical with incident light, and xz is vertical with emergent light.

5, the angle of prism B: ∠ xyz=θ.

How below describe in detail utilizes device of the present invention to realize the purpose of composograph of the present invention.

Suppose to show that required number of primary colors is N, these optical wavelength are respectively λ _i(i=1,2 ... N), at prism A, A ₁, A ₂, A ₄The o light in the used negative crystal and the principal refractive index of e light are respectively n _OiAnd n _Ei(i=1,2 ... N) (n in negative crystal _OiN _Ei), so the total 2N kind incident mode (polarization direction is perpendicular or parallel in optical axis) of the demonstration of N kind primary colours guarantees under the condition of N kind display primary that (the kind mode of N≤m≤2N) also is arranged in order and is designated as again n according to refractive index is ascending to filter out m _j(be n _J+1N _j), the refractive index in the used isotropic medium of prism B is respectively $n_i^{\&prime;}(i=\mathrm{1,2}\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;N).$

If n _jThe expression wavelength is λ _iThe principal refractive index n of light corresponding o light in the used negative crystal of prism _Oi, it is vertical with optical axis direction to require incident light must satisfy the polarization direction so in the design before entering headprism A, if light needs earlier through revising prism A _iEnter headprism A again, entering correction prism A so _iMake the polarisation of light direction vertical with optical axis direction before; If n _jBeing expressed as wavelength is λ _iThe principal refractive index n of light corresponding e light in the used negative crystal of prism _Ei, must to satisfy the polarization direction parallel with optical axis direction entering headprism A to require incident light so in the design, if light needs earlier through revising prism A _iEnter headprism A again, entering correction prism A so _iMake the polarisation of light direction parallel with optical axis direction before.

Supposing need be from revising prism A _iGoing into to inject compositor light is n _j(m _I-1＜j≤m _i, m _i〉=m _I-1〉=0, i 〉=1, m ₀=0, m _iBe positive integer, 1≤i≤u≤N, m _u≤ N, u represent last beam-splitting surface), the refractive index of supposing air is n ₀

Among 1}, the headprism A relevant each angle the preferred condition that satisfies be:

1, the effect of beam-splitting surface mainly contains 2 points:

(1) image of composite part primary colours: (as figure, beam-splitting surface (bc), (df), (sr))

i≠h _k+1，

i＝h _k+1，

s＝m _i+1，t＝m _i，

i≤u　　　　　　　　　　[24]；

H wherein _kRepresent k critical beam-splitting surface, it is numbered h _k(i.e. h _kIndividual beam-splitting surface),

U represents last beam-splitting surface, and the refractive index of air is n ₀

(2) light path among the adjustment headprism A: (as figure, beam-splitting surface (gh))

i≠h _k+1，

i＝h _k+1，

r＝m _i，m _i＝m _i-1， r≤u　　　　　　　　?　[25]；

Wherein u represents last beam-splitting surface, and the refractive index of air is n ₀

2,5. enter headprism A (as figure, normal incidence face (rs)) from incident direction:

Wherein u represents last beam-splitting surface.

2}, on i beam-splitting surface:

n _k＝n _j，n _k<n _k+1，

i≠h _k+1，

i＝h _k+1，

1≤k≤(m _i-m _i-1)，m _i-1<j≤m _i，

，i≤u　　　　　　[27]；

Wherein u represents last beam-splitting surface, and the refractive index of air is n ₀

3}, offset distance:

1, a kind of i beam-splitting surface of light incident of wavelength only revised prism A _iAnd the distance H between i the beam-splitting surface of headprism A _iPreferred satisfied:

H _i>0，1≤i≤N　　　 　　　　　　[28]；

The correction prism A of light incident that 2, two or more wavelength is arranged _iAnd the distance H between i the beam-splitting surface of headprism A _{I, k}(H _{I, k}0, m _I-1,＜j≤m _i, k 〉=2, k is a positive integer), for all from revising prism A _iIncident is (promptly from incident direction

Incident, 1≤i≤u, u represent last beam-splitting surface) the primary color image of light of different wave length and the offset distance of compound direction be:

1≤i≤N，1≤k<(k+1)≤(m _i-m _i-1) [29]；

So from same correction prism A _iOffset distance between two kinds of adjacent different primary color images of incident is:

Δd _i，k＝|d _i，k+1-d _i，k|，

1≤i≤N，1≤k<(k+1)≤(m _i-m _i-1) [30]；

As Δ d _{I, k}((Δ d during 〉=s _{I, k}-s) 〉=0), separate in the space during each primary color image incident, and through reaching the synthetic purpose of monochrome image of many primary colours fully at space overlap after the compositor.

Before entering compositor, incident light is used to adjust each other the phase place of light when arriving exit facet (av) of each primary colours earlier by the optical path compensation device of each primary colours correspondence.

Image enters from exit facet (av) ejaculation and from the plane of incidence (zy) and turns to prism B after will synthesizing at last, penetrates from exit facet (xz) after fully reflecting surface (xy) total reflection, turns to prism B to be mainly used in the exit direction of adjusting the image after synthesizing.

Turn to prism B the angle the condition that must satisfy be:

$\frac{n_0}{n_i^{\&prime;}}<\sin \mathrm{\&theta;},1\&le;i\&le;N---\left[31\right];$

The refractive index of air is n ₀, example among the figure adopts the right-angle prism of a base angle ∠ xyz=∠ yxz=θ=45 °.

Fig. 5 A is the synoptic diagram according to the multi-primary color image combination synthesizer of further embodiment of this invention.

The structure of the embodiment of Fig. 5 A and Fig. 3 A are basic identical, and the key distinction is each prism A, A among the embodiment of Fig. 5 A ₁, A ₂, A ₄Material be positive crystal, the material of prism B still is an isotropic material, and compares with Fig. 3 A, has saved prism A among Fig. 4 A ₃M represents prism A, A among the figure ₁, A ₂, A ₄Optical axis direction.Require the polarization of incident light direction must be parallel or in the design of this technical scheme of positive crystal perpendicular to above-mentioned optical axis direction.

Shown in Fig. 5 A, multi-primary color image combination synthesizer of the present invention comprises irregular polygon headprism A, is arranged at the correction prism A on each incident direction ₁, A ₂, A ₄And turn to prism B.Alphabetical represented limit identical among the figure has identical geometric properties.Dotted line is a boost line.Among the figure, 1., 2., 4., 5. represent incident direction.The width of s ' expression primary color image.Prism A, A shown in the figure ₁, A ₂, A ₄Building material identical, be positive crystal of the same race; The building material that turns to prism B is isotropic medium, but the refractive index of the light that the material that must guarantee to turn to prism B in visible-range shows any participation all greater than

).Each is provided with optical path compensator D before revising prism, and this optical path compensator D must not change light path.Headprism A is polygon and comprises a normal incidence face (rs) and a plurality of beam-splitting surface (bc), (df), (hg), (pq).Beam-splitting surface is defined as the prism facets of one of the prism A part light in can total reflection prism A.

Wherein, the incident light of injecting from normal incidence face (rs) directly vertically incides this normal incidence face (rs), and the incident light of other direction is injected correction prism A ₁, A ₂, A ₄One of the plane of incidence and penetrate from its exit facet, incide subsequently and one of the corresponding a plurality of beam-splitting surfaces of this correction prism (bc), (df), (pq), incident light along each incident direction is synthetic in headprism A, and the exit facet (av) from headprism A penetrates at last.After this, impinge perpendicularly on the plane of incidence that turns to prism B and penetrate perpendicular to its exit facet.Wherein, the exit facet of revising prism be parallel to each other with its corresponding beam-splitting surface, for example

In the present embodiment, preferred satisfied following geometric condition:

1, boost line explanation:

And with

Intersect at a w ₁,

And with

Intersect at a w ₂,

And with

Intersect at a w ₃,

And with

Intersect at a w ₄,

And with

Intersect at a w ₅

2, the seamed edge of prism A, A1, A2, A4: av is vertical with emergent light,

Rs is perpendicular to the incident light direction from 5. incident; Ab, cd, fg, hp, qr, st, tu, uv,

Do not require, but do not influence at prism A, A ₁, A ₂, A ₄In light path.

3, prism A, A ₁, A ₂, A ₄Angle:

(1) prism A: ∠ aw ₁B=π-θ ₁, ∠ cw ₂D=π-θ ₂, ∠ fw ₃G=π-θ ₃, ∠ hw ₄P=π-θ ₄,

∠qw ₅r＝π-θ ₅；

(2) prism A1: ∠ x ₁y ₁z ₁=π-θ ₁

(3) prism A ₂: ∠ x ₂y ₂z ₂=θ ₁-θ ₂=(π-θ ₂)-(π-θ ₁);

(4) prism A ₄:

∠x ₄y ₄z ₄＝θ ₁-θ ₂+θ ₃-θ ₄＝(π-θ ₄)-{(π-θ ₃)-[(π-θ ₂)-(π-θ ₁)]}；

4, the seamed edge of prism B: yz is vertical with incident light, and xz is vertical with emergent light.

5, the angle of prism B: ∠ xyz=θ.

How below describe in detail utilizes device of the present invention to realize the purpose of composograph of the present invention.

Suppose to show that required number of primary colors is N, these optical wavelength are respectively λ _i(i=1,2 ... N), at prism A, A ₁, A ₂, A ₄The o light in the used positive crystal and the principal refractive index of e light are respectively n _OiAnd n _Ei(i=1,2 ... N) (n in positive crystal _Oi＜n _Ei), so the total 2N kind incident mode (polarization direction is perpendicular or parallel in optical axis) of the demonstration of N kind primary colours guarantees under the condition of N kind display primary that (the kind mode of N≤m≤2N) also is arranged in order and is designated as again n according to refractive index is ascending to filter out m _j(be n _J+1N _j); Refractive index in the used isotropic medium of prism B is respectively $n_i^{\&prime;}(i=\mathrm{1,2}\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;N).$

If n _jThe expression wavelength is λ _iThe principal refractive index n of light corresponding o light in the used positive crystal of prism _Oi, it is vertical with optical axis direction to require incident light must satisfy the polarization direction so in the design before entering headprism A, if light needs earlier through revising prism A _iEnter headprism A again, entering correction prism A so _iMake the polarisation of light direction vertical with optical axis direction before; If n _jBeing expressed as wavelength is λ _iThe principal refractive index n of light corresponding e light in the used positive crystal of prism _Ei, must to satisfy the polarization direction parallel with optical axis direction entering headprism A to require incident light so in the design, if light needs earlier through revising prism A _iEnter headprism A again, entering correction prism A so _iMake the polarisation of light direction parallel with optical axis direction before.

Supposing need be from revising prism A _iThe light of going into to inject compositor is n _j(m _I-1＜j≤m _i, m _i〉=m _I-1〉=0, i 〉=1, m ₀=0, m _iBe positive integer, 1≤i≤u≤N, m _u≤ N, u represent last beam-splitting surface), the refractive index of supposing air is n ₀

Among 1}, the prism A relevant each angle the preferred condition that satisfies be:

1, the effect of beam-splitting surface mainly contains 2 points:

(1) image of composite part primary colours: (as figure, beam-splitting surface (bc), (df), (pq))

s＝m _i+1，t＝m _i，i≤u [32]；

Wherein u represents last beam-splitting surface, and the refractive index of air is n ₀

(2) light path among the adjustment headprism A: (as figure, beam-splitting surface (gh))

r＝m _i，m _i＝m _i-1，r≤u [33]；

Wherein u represents last beam-splitting surface, and the refractive index of air is n ₀

2,5. enter headprism A (as figure, normal incidence face (rs)) from incident direction:

Wherein u represents last beam-splitting surface.

2}, on i beam-splitting surface:

n _k＝n _j，n _k<n _k+1

1≤k≤(m _i-m _i-1)，m _i-1<j≤m _i，i≤u [35]；

Wherein u represents last beam-splitting surface, and the refractive index of air is n ₀

3}, offset distance:

1, i the beam-splitting surface that has only a kind of light incident of wavelength revised prism A _iAnd the distance H between i the beam-splitting surface of headprism A _iPreferred satisfied:

Hi>0，1≤i≤N [36]；

The correction prism A of light incident that 2, two or more wavelength is arranged _iAnd the distance H between i the beam-splitting surface of headprism A _{I, k}(H _{I, k}0, m _I-1＜j≤m _i, k 〉=2, k is a positive integer), for all from revising prism A _iThe primary color image of the light of the different wave length of incident (promptly from 1. incident of incident direction, 1≤i≤u, u represent last beam-splitting surface) and the offset distance of compound direction are:

1≤i≤N，1≤k<(k+1)≤(m _i-m _i-1) [37]；

So from same correction prism A _iOffset distance between two kinds of adjacent different primary color images of incident is:

Δd _i，k＝|d _i，k+1-d _i，k|，

1≤i≤N，1≤k<(k+1)≤(m _i-m _i-1) [38]；

As Δ d _{I, k}((Δ d during 〉=s _{I, k}-s) 〉=0), separate in the space during each primary color image incident, and through reaching the synthetic purpose of monochrome image of many primary colours fully at space overlap after the compositor.

Before entering compositor, incident light is used to adjust each other the phase place of light when arriving exit facet (av) of each primary colours earlier by the optical path compensation device of each primary colours correspondence.

Image enters from exit facet (av) ejaculation and from the plane of incidence (zy) and turns to prism B after will synthesizing at last, penetrates from exit facet (xz) after fully reflecting surface (xy) total reflection, turns to prism B to be mainly used in the exit direction of adjusting the image after synthesizing.

Turn to prism B the angle the condition that must satisfy be:

$\frac{n_0}{n_i^{\&prime;}}<\sin \mathrm{\&theta;},1\&le;i\&le;N---\left[39\right];$

The refractive index of air is n ₀, example among the figure adopts the right-angle prism of a base angle ∠ xyz=∠ yxz=θ=45 °.

In addition, for Fig. 5 A by two prism A ₄, the light of two kinds of primary colours is parallel respectively to incide two prism A ₄Situation can be applied to equally respectively revise prism among other embodiments of the invention and other embodiment.

Fig. 5 B is the synoptic diagram according to the multi-primary color image combination synthesizer of further embodiment of this invention.

Fig. 5 B and Fig. 5 A have many something in common, and identical among the label of these same sections and Fig. 3 A also represented identical implication, so its description can be with reference to the situation among above-mentioned Fig. 5 A.Among Fig. 5 B, the 4th beam-splitting surface is (sr) ((sr) is the normal incidence face in the embodiment of Fig. 4 A), and the normal incidence face is (pq) ((pq) is the 4th beam-splitting surface in the embodiment of Fig. 4 A).In the present embodiment, if a back beam-splitting surface of a beam-splitting surface is different with its sense of rotation with respect to last beam-splitting surface with respect to its sense of rotation, claim that so this beam-splitting surface is critical beam-splitting surface.(first beam-splitting surface and last except), for example beam-splitting surface (gh) among Fig. 5 B.

The difference of embodiment shown in embodiment shown in Fig. 5 B and Fig. 5 A mainly is: among the embodiment of Fig. 5 A, all beam-splitting surfaces are with respect to the sense of rotation of last beam-splitting surface identical (except first beam-splitting surface); And among the embodiment of Fig. 5 B, a back beam-splitting surface of at least one beam-splitting surface is with respect to its sense of rotation different with its sense of rotation with respect to last beam-splitting surface (except first beam-splitting surface and last beam-splitting surface), such as beam-splitting surface (gh).

In the embodiment shown in Fig. 5 B, along first direction 1., 2. identical among situation and Fig. 5 A of incident of second direction.4. in the situation of incident, there is being the parallel light of two kinds of primary colours to incide same correction prism A along direction ₄The parallel light of this multiple primary colours incides same correction prism A _iThe situation that incides the i beam-splitting surface again can be applicable to respectively revise prism among other embodiments of the invention and other embodiment equally.In addition, in the present embodiment, along direction 4. the light of incident through revising prism A ₄The beam-splitting surface that enters is (sr).And along direction 5. the beam-splitting surface of the direct vertical incidence of light of incident be (pq), i.e. normal incidence face.

The synthetic number of primary colors of multi-primary color image that only can realize with a headprism in the embodiment of Fig. 5 A is limited; And the number of primary colors that the multi-primary color image that only can realize with a headprism in the embodiment of Fig. 5 B synthesizes is far more than the embodiment of Fig. 5 A.

In the present embodiment, the preferred satisfied following geometric condition of device:

1, boost line explanation:

And with

Intersect at a w ₁,

And with

Intersect at a w ₂,

And with

Intersect at a w ₃,

And with

Intersect at a w ₅

2, prism A, A ₁, A ₂, A ₄Seamed edge: av is vertical with emergent light,

Pq is perpendicular to the incident light direction from 5. incident; Ab, cd, fg, hp, qr, st, tu, uv, Do not require, but do not influence at prism A, A ₁, A ₂, A ₄In light path.

3, prism A, A ₁, A ₂, A ₄Angle:

(1) prism ends: ∠ aw ₁B=π-θ ₁, ∠ cw ₂D=π-θ ₂, ∠ fw ₃G=π-θ ₃, ∠ rsw ₄=π-θ ₄,

∠qw ₅r＝π-θ ₅；

(2) prism A ₁: ∠ x ₁y ₁z ₁=π-θ ₁

(3) prism A ₂: ∠ x ₂y ₂z ₂=θ ₁-θ ₂(π-θ ₂)-(π-θ ₁)

(4) prism A ₄:

∠x ₄y ₄z ₄＝π-θ ₁+θ ₂-θ ₃-θ ₄＝(π-θ ₃)-[(π-θ ₂)-(π-θ ₁)]-θ ₄；

4, the seamed edge of prism B: yz is vertical with incident light, and xz is vertical with emergent light.

5, the angle of prism B: ∠ xyz=θ.

How below describe in detail utilizes device of the present invention to realize the purpose of composograph of the present invention.

Suppose to show that required number of primary colors is N, these optical wavelength are respectively λ _i(i=1,2 ... N), at prism A, A ₁, A ₂, A ₄The o light in the used positive crystal and the principal refractive index of e light are respectively n _OiAnd n _Ei(i=1,2 ... N) (n in positive crystal _Oi＜n _Ei), so the total 2N kind incident mode (polarization direction is perpendicular or parallel in optical axis) of the demonstration of N kind primary colours guarantees under the condition of N kind display primary that (the kind mode of N≤m≤2N) also is arranged in order and is designated as again, n according to refractive index is ascending to filter out m _j(be n _J+1N _j), the refractive index in the used isotropic medium of prism B is respectively $n_i^{\&prime;}(i=\mathrm{1,2}\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;N).$

If n _j, the expression wavelength is λ _iThe principal refractive index of light corresponding o light in the used negative crystal of prism, n _Oi, it is vertical with optical axis direction to require incident light must satisfy the polarization direction so in the design before entering headprism A, if light needs earlier through revising prism A _iEnter headprism A again, entering correction prism A so _iMake the polarisation of light direction vertical with optical axis direction before; If n _jBeing expressed as wavelength is λ _iThe principal refractive index n of light corresponding e light in the used negative crystal of prism _Ei, must to satisfy the polarization direction parallel with optical axis direction entering headprism A to require incident light so in the design, if light needs earlier through revising prism A _iEnter headprism A again, entering correction prism A so _iMake the polarisation of light direction parallel with optical axis direction before.

Supposing need be from revising prism A _iGoing into to inject compositor light is n _j(m _I-1＜j≤m _i, m _i〉=m _I-1〉=0, i 〉=1, m ₀=0, m _iBe positive integer, 1≤i≤u≤N, m _u≤ N, u represent last beam-splitting surface), the refractive index of supposing air is n ₀

Among 1}, the headprism A relevant each angle the preferred condition that satisfies be:

1, the effect of beam-splitting surface mainly contains 2 points:

(1) image of composite part primary colours: (as figure, beam-splitting surface (bc), (df), (sr))

i≠h _k+1，

i＝h _k+1，

s＝m _i+1，t＝m _i， i≤u [40]；

H wherein _kRepresent k critical beam-splitting surface, it is numbered h _k(i.e. h _kIndividual beam-splitting surface),

U represents last beam-splitting surface, and the refractive index of air is n ₀

(2) light path among the adjustment headprism A: (as figure, beam-splitting surface (gh))

i≠h _k+1，

i＝h _k+1，

r＝m _i，m _i＝m _i-1，

r≤u [41]；

Wherein u represents last beam-splitting surface, and the refractive index of air is n ₀

2,5. enter headprism A (as figure, normal incidence face (rs)) from incident direction:

Wherein u represents last beam-splitting surface.

2}, on i beam-splitting surface:

n _k＝n _j，nk<n _k+1，

i≠h _k+1，

i＝h _k+1，

1≤k≤(m _i-m _i-1)，m _i-1<j≤m _i，

i≤u [43]；

Wherein u represents last beam-splitting surface, and the refractive index of air is n ₀

3}, offset distance:

1, a kind of i beam-splitting surface of light incident of wavelength only revised prism A _iAnd the distance H between i the beam-splitting surface of headprism A _iPreferred satisfied:

H _i>0，1≤i≤N [44]；

The correction prism A of light incident that 2, two or more wavelength is arranged _iAnd the distance H between i the beam-splitting surface of headprism A _{I, k}(H _{I, k}0, m _I-1＜j≤m _i, k 〉=2, k is a positive integer), for all from revising prism A _iIncident is (promptly from incident direction

Incident, 1≤i≤u, u represent last beam-splitting surface) the primary color image of light of different wave length and the offset distance of compound direction be:

1≤i≤N，1≤k<(k+1)≤(m _i-m _i-1) [45]；

So from same correction prism A _iOffset distance between two kinds of adjacent different primary color images of incident is:

Δd _i，k＝|d _i，k+1-d _i，k|，

1≤i≤N，1≤k<(k+1)≤(m _i-m _i-1) [46]；

As Δ d _{I, k}((Δ d during 〉=s _{I, k}-s) 〉=0), separate in the space during each primary color image incident, and through reaching the synthetic purpose of monochrome image of many primary colours fully at space overlap after the compositor.

Before entering compositor, incident light is used to adjust each other the phase place of light when arriving exit facet (av) of each primary colours earlier by the optical path compensation device of each primary colours correspondence.

Image enters from exit facet (av) ejaculation and from the plane of incidence (zy) and turns to prism B after will synthesizing at last, penetrates from exit facet (xz) after fully reflecting surface (xy) total reflection, turns to prism B to be mainly used in the exit direction of adjusting the image after synthesizing.

Turn to prism B the angle the condition that must satisfy be:

$\frac{n_0}{n_i^{\&prime;}}<\sin \mathrm{\&theta;},1\&le;i\&le;N---\left[47\right];$

The refractive index of air is n ₀, example among the figure adopts the right-angle prism of a base angle ∠ xyz=∠ yxz=θ=45 °.

Fig. 6 is the synoptic diagram according to the multi-primary color image combination synthesizer of fourth embodiment of the invention.The headprism A of this compositor has three beam-splitting surfaces (bc), (df), (gh), and its principle and above all embodiment are similar.Its preferred geometric condition is:

1, boost line explanation:

And with Intersect at a w ₁

And with

Intersect at a w ₂

And with

Intersect at a w ₃

And with

Intersect at a w ₄

2, prism A, A ₁, A ₂, A ₃Seamed edge: av is vertical with emergent light,

Rp perpendicular to from the incident light direction ab of 4. incident, cd, fg, hp, rs, st, tu, uv,

Do not require, but do not influence at prism A, A ₁, A ₂, A ₃In light path.

3, prism A, A ₁, A ₂, A ₃Angle:

(1) prism A: ∠ aw ₁B=π-θ ₁, ∠ cw ₂D=π-θ ₂, ∠ fw ₃G=π-θ ₃, ∠ hw ₄P=π-θ ₄

(2) prism A ₁: ∠ x ₁y ₁z ₁=π-θ ₁

(3) prism A ₂: ∠ x ₂y ₂z ₂=θ ₁-θ ₂=(π-θ ₂)-(π-θ ₁);

(4) prism A ₃: ∠ x ₃y ₃z ₃=π-θ ₃-θ ₁+ θ ₂=(π-θ ₃)-[(π-θ ₂)-(π-θ ₁)];

4, the seamed edge of prism B: yz is vertical with incident light, and xz is vertical with emergent light.

5, the angle of prism B: ∠ xyz=θ.

Other content and four beam-splitting surfaces identical, difference is: beam-splitting surface is (bc), (df), (gh); The normal incidence face is (pr).

The material of present embodiment can be isotropic material, negative crystal or positive crystal, and is identical with content among the above corresponding embodiment at the condition of these materials.

Fig. 7 is the synoptic diagram according to the multi-primary color image combination synthesizer of fifth embodiment of the invention.The headprism A of this compositor has five beam-splitting surfaces (bc), (df), (gh), (rs), (c ₁Q), its principle and above all embodiment are similar.Its preferred geometric condition is:

1, boost line explanation:

And with

Intersect at a w ₁

And with

Intersect at a w ₂

And with Intersect at a w ₃

And with

Intersect at a w ₅

And with

Intersect at a w ₆

2, prism A, A ₁, A ₂, A ₄, A ₅Seamed edge: av is vertical with emergent light,

Perpendicular to incident light direction from 6. incident; Ab, cd, fg, hp, pa ', a ' b ',

Qr, st, tu, uv,

Do not require, but do not influence at prism A, A ₁, A ₂, A ₄, A ₅In light path.

3, prism A, A ₁, A ₂, A ₄, A ₅Angle:

(1) prism A: ∠ aw ₁B=π-θ ₁, ∠ cw ₂D=π-θ ₂, ∠ fw ₃G=π-θ ₃, ∠ rsw ₄=π-θ ₄,

∠qw ₅r＝π-θ ₅，∠r ₁w ₆c ₁＝π-θ ₆；

(2) prism A ₁: ∠ x ₁y ₁z ₁=π-θ ₁

(3) prism A ₂: ∠ x ₂y ₂z ₂=θ ₁-θ ₂=(π-θ ₂)-(π-θ ₁);

(4) prism A ₄: ∠ x ₄y ₄z ₄=π-θ ₁+ θ ₂-θ ₃-θ ₄=(π-θ ₃)-[(π-θ ₂)-(π-θ ₁)]-θ ₄

(5) prism A ₅:

∠x ₅y ₅z ₅＝θ ₁-θ ₂+θ ₃+θ ₄-θ ₅＝(π-θ ₅)-{(π-θ ₃)-[(π-θ ₂)-(π-θ ₁)]-θ ₄}；

4, the seamed edge of prism B: yz is vertical with incident light, and xz is vertical with emergent light.

5, the angle of prism B: ∠ xyz=θ.

Other content and four beam-splitting surfaces identical, difference is: beam-splitting surface is (bc), (df), (gh), (c ₁Q); The normal incidence face is (b ' r ₁); Critical beam-splitting surface is (rs).

The material of present embodiment can be isotropic material, negative crystal or positive crystal, and is identical with content among the above corresponding embodiment at the condition of these materials.

It should be noted that the relevant technologies feature among above each embodiment is not to be intended to limit ground to limit embodiments of the present invention.Be appreciated that under the prerequisite that realizes image combination purpose of the present invention and can select to be used according to general optics general knowledge the technical characterictic in the various embodiments described above.For example, 4. used on two correction prism A4 to come respectively light in direction among above Fig. 3 A embodiment by a kind of different base colors, only use a correction prism A4 to come light and in the embodiment of Fig. 3 B, 4. go up by two kinds of different base colors in direction, but obviously these two kinds of technical schemes can both realize essentially identical technique effect, and these two kinds of technical schemes are of equal value.In addition, these two kinds of correction prism schemes of 4. going up of above-mentioned direction can be used on other direction equally.Moreover, as mentioned above, under the prerequisite that can realize purpose of the present invention (being that image is synthetic), but the arbitrary beam-splitting surface among any embodiment of the present invention is the corresponding correction prism with it not like that of the beam-splitting surface (gh) among the embodiment of image pattern 3B all, promptly do not utilize this beam-splitting surface to carry out incident, but pass through the light of other beam-splitting surface incident different base colors.The described above-mentioned all embodiment of instructions part of the present invention just provide the special case of using device of the present invention to realize the image combination in every way, therefore can realize that wherein the technical characterictic of similar or identical function obviously can exchange or accept or reject according to common practise.

The structure and the embodiment of multi-primary color image combination synthesizer of the present invention have more than been described.But be appreciated that many other embodiment also within the scope of the invention.Though only be used with a headprism and a plurality of correction prism in for example above each scheme, it is synthetic that a plurality of headprisms also capable of being combined carry out image.For example can synthesize with other light beam being input to another headprism from the normal incidence face of another headprism again by the synthetic light beam of a headprism.The realization of this mode is that the personnel of described technical field are conspicuous.

Those skilled in the art can be obvious, can carry out various modifications and variations and without departing from the spirit and scope of the present invention to above-mentioned exemplary embodiment of the present invention.Therefore, be intended to that the present invention is covered and drop in appended claims and the equivalence techniques scheme scope thereof to modification of the present invention and modification.

Claims (4)

1. a multi-primary color image combination synthesizer is characterized in that, comprise headprism and be arranged on each incident direction at least one revise prism,

Described headprism is polygon and comprises a normal incidence face, a plurality of beam-splitting surface and an exit facet, the light that described headprism is used for going into to inject headprism from described normal incidence face and described beam-splitting surface forms the light path from described normal incidence face to described exit facet, total reflection takes place at each beam-splitting surface place in described light path

Described correction prism all has a plane of incidence and an exit facet,

The incident light of injecting from the normal incidence face directly vertically incides described normal incidence face, the incident light of other incident direction is then injected the plane of incidence of a correction prism in described at least one correction prism and is penetrated from its exit facet, incide subsequently and the corresponding beam-splitting surface of this correction prism, the incident light of each incident direction described light path along described headprism in described headprism is synthetic, exit facet from described headprism penetrates at last

The exit facet of wherein revising prism be parallel to each other with the corresponding beam-splitting surface of this correction prism.

2. multi-primary color image combination synthesizer as claimed in claim 1 is characterized in that, the size of the angle of the described plane of incidence of respectively revising prism and exit facet is determined according to the angle between each corresponding beam-splitting surface of described headprism.

3. multi-primary color image combination synthesizer as claimed in claim 1 is characterized in that, the headprism of described multi-primary color image combination synthesizer and at least one are revised prism and be made of in isotropic material, negative crystal and the positive crystal any.

4. multi-primary color image combination synthesizer as claimed in claim 1 is characterized in that, also comprises turning to prism before the exit facet that is arranged at described headprism.

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