CN1560664A - Reflection beam splitting and combining device - Google Patents
Reflection beam splitting and combining device Download PDFInfo
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- CN1560664A CN1560664A CNA2004100065731A CN200410006573A CN1560664A CN 1560664 A CN1560664 A CN 1560664A CN A2004100065731 A CNA2004100065731 A CN A2004100065731A CN 200410006573 A CN200410006573 A CN 200410006573A CN 1560664 A CN1560664 A CN 1560664A
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- multiplexing apparatus
- beam split
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Abstract
The invention discloses reflecting light splitting and gathering device, which arranges the first dielectric film and the second dielectric film on the catercorner section of two groups of opposed surface of the prism groups, thus the prism can reflect or transmit the two beams of tricolor lights incoming from the two incidence surfaces; and three optical valves are arranged on the three adjoined surfaces of the prism group, they are adjoined pairwise, in order to modulate the tricolor lights transmitted or reflected by the prism group, finally, integrates them into a output beam to be sent out with the prism group. The invention can use the above mentioned optical structure system to shorten back focus effectively, thus reduces the volume and the difficulty of process.
Description
Technical field
The present invention relates to a kind of reflective beam split Multiplexing apparatus, the reflective beam split Multiplexing apparatus in particularly a kind of reflective optic projection display system that is applied in full-color projection.
Background technology
Optical projection display system development technically mainly can be divided into two partly, the one, partly develop at volume and weight towards miniaturization and lightweight, another then is the lifting of luminescence efficiency partly, comprises brightness and resolution and must develop and more be considered as the place that everybody focuses on.
Though common reflection type liquid crystal projection display system respectively has different system architectures at present, but nearly all structure has all adopted X type prism (X-prism), and total system is mainly formed an imaging system by an X type Ling Jing and three groups of polarization colour splitting prisms (PBS), it is to inject three groups of different polarization colour splitting prism group (polarizingbeam splitter respectively after utilizing dichronic mirror to be divided into red, blue, green (RGB) primaries, PBS), reflected respectively to penetrate by the prism cemented surface and be incident upon R, G, B reflection type liquid wafer; After the cemented surface of the RBG three-beam prism after the outgoing passed, through X type prism regrouped together, is amplified on the screen through projection objective.Three light beams of RGB are common design concept, the variation that different are in light projection system, and the difference of light projection system then is the difference of luminous energy service efficiency of system and the size of shared volume.
Be example with the reflection type liquid crystal projection display system that uses X type prism, its required back of the body Jiao is longer, and long back of the body Jiao will cause volume bigger, and also difficulty on making, and production cost is also higher, runs in the opposite direction with development trend now.Therefore, the present invention proposes a kind of reflective beam split Multiplexing apparatus that is applied in the optical projection display system, has these disappearances in the prior art with solution.
Summary of the invention
The purpose of this invention is to provide a kind of reflective beam split Multiplexing apparatus, utilize the prism assembly of special construction design to close three different optics valves, the light beam of red green blue tricolor is integrated, make it have the shortest back of the body Jiao, and can reach the highest effective utilization (efficiency) by this.
Another object of the present invention provides a kind of reflective beam split Multiplexing apparatus, and is simultaneously little with volume, make comparatively simply, and the advantage that can reduce cost etc. is with the degree of difficulty in the known manufacturing of effective simplification.
For reaching above-mentioned purpose, reflective beam split Multiplexing apparatus of the present invention comprises a prism group, it is a cube structure, up and down two be provided with one first dielectric film on the diagonal cut on surface relatively at this cube, and be provided with one second dielectric film on the diagonal cut on cubical left and right sides surface in addition, this prism group system will will be reflected respectively and transmission by the primaries of two plane of incidence incidents by this two dielectric film respectively; And there are three optics valves to be separately positioned on this cube structure three surfaces adjacent one another are, make per two optics valves all adjacent, these a little optics valves are to be used for the primaries of modulation through prism group transmission/reflection, convert thereof into anti-phase inclined to one side optical activity, make it penetrate this prism group more respectively and be combined into an output beam and launch.
In above-mentioned cube structure, its six faces all are utilized.Wherein be equipped with three optics valves respectively on three surfaces adjacent one another are, in three remaining surfaces, two as the plane of incidence, an outlet of launching as output beam, therefore six faces of cube structure all are utilized, and make that beam split Multiplexing apparatus volume is minimum, and required optical element seldom, and simplify the combinator of reflective optic Imaing projector (projection device) or light engine (Optical Engine) greatly, reduce the complexity and the degree of difficulty of assembling.
The effect that can therefrom be easier to understand purpose of the present invention, technology contents, characteristics and be reached is described in detail by the specific embodiment conjunction with figs. below.
Description of drawings
Fig. 1 is a perspective view of the present invention;
Fig. 2 is STRUCTURE DECOMPOSITION figure of the present invention;
Fig. 3 (a) and Fig. 3 (b) are the structural representation of the prism group of the present invention's use;
Fig. 4 is applied in embodiment synoptic diagram in the optical projection display system for the present invention;
Fig. 5 is the advance embodiment synoptic diagram of light path of primaries of the present invention;
Fig. 6 is advance another embodiment synoptic diagram of light path of primaries of the present invention.
Description of reference numerals: 10 reflective beam split Multiplexing apparatus; 12 prism groups; 14 first dielectric films; 16 second dielectric films; 18 blue light scholar-tyrants; 20 red light scholar-tyrants; 22 green light scholar-tyrants; 24 incident light sources; 26 spectroscopes; 28 catoptrons; 30 catoptrons.
Embodiment
The reflective beam split Multiplexing apparatus that the present invention proposes utilizes the prism assembly of special construction design to close three different reflection type liquid wafers, the modulation red green blue tricolor also integrates its light beam, make it have the shortest back of the body Jiao, and can reach the highest effective utilization by this, and this reflective beam split Multiplexing apparatus can be widely used in the optical image projection arrangement, for example image projection apparatus of light engine, projector, back projection TV, digital movie image projection apparatus, digitized video emulator etc. etc.
Fig. 1 and Fig. 2 are respectively perspective view of the present invention and STRUCTURE DECOMPOSITION figure thereof, and as shown in the figure, a reflective beam split Multiplexing apparatus 10 is made up of a prism group 12 and three 18,20,22 on optics valves.This prism group 12 is a cube structure, its material can for glass or other be to primaries material transparent etc., up and down two be provided with one first dielectric film 14 on the diagonal cut on surface relatively at cube, and on this cubical left and right sides apparent surface's diagonal cut, then be provided with one second dielectric film (dielectric thin film) 16, this two first and second dielectric film 14,16 can consult shown in Fig. 3 (a) and Fig. 3 (b) simultaneously in the position of prism group 12 cubical diagonal cut, by this two dielectric film 14,16 are made of different plated film conditions, and the prism component can be slit into four prisms, make it form six outside surfaces altogether, and the array mode of the prism group of these four cube structures that prism was combined into can be the gummed mode, or utilization physical construction combines; In addition, the slit on these four composition surfaces that prism made up less than 15 microns (m) about.This prism group 10 can be reflected respectively and transmission restrainting primaries by two of two planes of incidence (being left-hand face and lower surface) incident respectively.
At the same time with reference to figure 1 and Fig. 2, other has three optics valves, blue light scholar-tyrant 18, red light scholar-tyrant 20 and green light scholar-tyrant 22, it is separately positioned on the cube structure of prism group 12 three surfaces adjacent one another are, by the direction among the figure is upper surface, left-hand face and front surface, make this three optics valves 18,20,22 are respectively adjacent in twos, blue light scholar-tyrant 18, red light scholar-tyrant 20 and green light scholar-tyrant 22 are used for modulation this primaries (BRG) through the 12 transmission/reflections of prism group, make it convert anti-phase inclined to one side optical activity to, penetrate this prism group 12 more respectively and be combined into an output beam and be emitted to a projection objective (not shown), to project this output beam.
Wherein, above-mentioned optics valve 18,20,22 can be reflection type liquid crystal panel, comprise red liquid crystal panel, green liquid crystal panel and blue liquid crystal panel, or be that the penetration liquid crystal panel cooperates catoptron, this penetration liquid crystal panel also comprises red liquid crystal panel, green liquid crystal panel and blue liquid crystal panel; Optics valve 18,20,22 is Digital Light Processor (DLP) also.In addition, can be respectively one of them of S polarized light or P polarized light by the isolated three primary colors spectrum of incident ray.
When incident beam entering reflective beam split Multiplexing apparatus of the present invention before, need earlier processing through spectroscope and catoptron.As shown in Figure 4, an incident light source 24, it provides an incident ray; And there is a spectroscope 26 to be positioned on the light path of incident ray, this spectroscope 26 is divided into two bundle primitive color lights with incident ray and is reflected respectively and transmission, beam reflected is the red light (Rp) of P polarization and the green light (Gs) of S polarization, and the light beam of another transmission then is a P polarization blue light; The green light (Gs) of the red light of P polarization (Rp) and S polarization is utilized the reflection of a catoptron 28 and is incident to the plane of incidence of beam split Multiplexing apparatus 10, and P polarization blue light then penetration mirror 30 reflects another plane of incidence of beam split Multiplexing apparatus 10 so far.Wherein, outside incident light source, also be provided with a polar switching device or a polarity selection component (not shown), make incident ray enter beam split Multiplexing apparatus 10 (spectroscope 26) before, make primaries convert suitable polarization polarity to through this polar switching device or polar selecting device earlier.In addition, also can a polarity selection component be set before aforesaid projection objective, make output beam select suitable polarization polarity through this polarity selection component in the preceding elder generation that enters this projection objective.
When two bundle light of the green light (Gs) of the red light (Rp) of P polarization and S polarization and P polarization blue light (Bp) are incident to the light path of advancing in the reflective beam split Multiplexing apparatus of the present invention respectively by two planes of incidence, see also Fig. 5.As shown in the figure, the red light (Rp) of the P polarization of incident and the green light (Gs) of S polarization are respectively by 14 transmissions of first dielectric film and reflection, in other words, the red light of P polarization (Rp) penetrates this first dielectric film 14 and becomes the red light (Rs) of S polarization through red light scholar-tyrant 20 reverses of polarity, is reflected away by first dielectric film 14 more afterwards; The green light of S polarization (Gs) is then reflexed to green light scholar-tyrant 22 reverses of polarity by first dielectric film 14 and becomes the green light (Gp) of P polarization, penetrates first dielectric film 14 afterwards again and launches.On the other hand,, become S polarization blue light (Bs) through blue light scholar-tyrant 18 reverses of polarity, and then pass second dielectric film 16 and launch then by after second dielectric film 16 reflection earlier by the P polarization blue light (Bp) of another plane of incidence incident; So can simultaneously the red light (Rs) of S polarization, the green light (Gp) and the S polarization blue light (Bs) of P polarization be combined into an output beam.The optical characteristics of first dielectric film 14 and second dielectric film 16 is equivalent to the polarization spectroscope, the light of S polarization and P polarization can be separated or combination, because only need to handle respectively, reach the function of S polarization and P polarization deciliter easily than the polarization spectroscope of full spectrum (comprising green light, red light and blue light) at green light, red light or blue light.
The polarity of primaries used in the present invention (RGB) can be selected from S polarized light or P polarized light respectively according to different demands, for example RGB three coloured light of incident can be P polarized light or S polarized light simultaneously, and then the characteristic of the reflection/transmission of Dui Ying this two dielectric films also must be adjusted.That is after selected suitable polarization polarity, with respect to the characteristic of first dielectric film and second dielectric film then according to selected polarized light and different, so its characteristic also must satisfy the advance light path and the principle of above-mentioned primaries.In addition, also have other by the primary colour beam of two plane of incidence incidents and implement aspect, as long as the light path of each primitive color light can be worked in coordination with relative optics valve, so its arrangement mode also has multiple choices; The incident light that for example Figure 6 shows that RGB three coloured light is all P polarized light (Rp, Gp, Bp), first dielectric film 14 and second dielectric film 16 via suitable optical characteristics, to handle polarization deciliter light, light after 18,20,22 reflections of optics valve can be combined into an output beam, deliver to a projection objective.The polarization combination that also has RGB three coloured light of other type, these a little different combinations or arrangement design all are encompassed within the protection domain of claim definition of the present invention.
Because the present invention uses the cube structure of prism group, be equipped with three optics valves respectively on three surfaces adjacent one another are in its six outside surfaces, in three remaining surfaces, two as the plane of incidence, an outlet of launching as output beam, therefore six faces of cube structure all are utilized, make that beam split Multiplexing apparatus volume is minimum, required optical element seldom, simplify the combinator of reflective optic Imaing projector or light engine greatly, and then reduce the complexity and the degree of difficulty of assembling.Therefore, the present invention utilizes a prism assembly with two dielectric film particular design to close three different optics valves, the technology that light beam integrates and transmission is gone out with red green blue tricolor, not only can make well-behaved actinic light device have the shortest back of the body Jiao, and the while is little with volume, making is comparatively simple, and the advantage that can reduce cost etc., with the degree of difficulty in the known making of effective simplification.
Above-described embodiment only is used to illustrate technological thought of the present invention and characteristics; its purpose makes those skilled in the art can understand content of the present invention and is implementing according to this; but can not limit scope of the present invention with this; so all equalizations of doing according to disclosed spirit change or modify, and must fall within protection scope of the present invention.
Claims (21)
1, a kind of reflective beam split Multiplexing apparatus comprises:
One prism group, it is a cube structure, up and down two be provided with one first dielectric film on the diagonal cut on surface relatively at this cube, and be provided with one second dielectric film on this cubical left and right sides apparent surface's diagonal cut, this prism group reflects the primaries by two plane of incidence incidents respectively and transmission respectively; And
Three optics valves, be arranged on this cube three surfaces adjacent one another are, make per two these optics valves all adjacent, in order to modulation this primaries through this prism group transmission/reflection, to convert anti-phase inclined to one side optical activity to, be combined into an output beam via this prism group transmission/reflection respectively again.
2, reflective beam split Multiplexing apparatus as claimed in claim 1, the prism group that it is characterized in that this cube structure is combined by four prisms, form six outside surfaces altogether, and two-phase his-and-hers watches mask there is this diagonal cut and this cubical left and right sides apparent surface another this diagonal cut also arranged about this cube.
3, reflective beam split Multiplexing apparatus as claimed in claim 2, the prism group of these four cube structures that prism combined wherein, its array mode can be selected from gummed and utilization physical construction combines.
4, reflective beam split Multiplexing apparatus as claimed in claim 3, wherein the slit on these four composition surfaces that prism made up is less than 15 microns (m).
5, reflective beam split Multiplexing apparatus as claimed in claim 1, wherein the material of this prism group is selected from glass and other is to the primaries material transparent.
6, reflective beam split Multiplexing apparatus as claimed in claim 1 also comprises a projection objective, throws this output beam.
7, reflective beam split Multiplexing apparatus as claimed in claim 1, wherein this optics valve is a reflection type liquid crystal panel, comprises red liquid crystal panel, green liquid crystal panel and blue liquid crystal panel.
8, reflective beam split Multiplexing apparatus as claimed in claim 1, wherein these optics valves cooperate catoptron for the penetration liquid crystal panel, and liquid crystal panel comprises red liquid crystal panel, green liquid crystal panel and blue liquid crystal panel.
9, reflective beam split Multiplexing apparatus as claimed in claim 1, wherein these optics valves are Digital Light Processor (DLP).
10, reflective beam split Multiplexing apparatus as claimed in claim 1 is characterized in that, before primaries is injected this plane of incidence, also comprises:
One incident light source provides an incident ray;
One spectroscope is positioned on the light path of this incident ray, and this spectroscope is divided into two bundle primitive color lights with this incident ray, a branch of reflection, and another bundle primitive color light then penetrates this spectroscope; And
Two-mirror reflexes to two planes of incidence of this prism group with this two bundles primitive color light respectively.
11, reflective beam split Multiplexing apparatus as claimed in claim 10, wherein outside this incident light source, also be provided with a polar switching device, it is preceding earlier through this polar switching device to make this incident ray enter this spectroscope, and then makes this incident light enter the preceding higher single polarization of tool intensity of this spectroscope.
12, reflective beam split Multiplexing apparatus as claimed in claim 10, wherein outside this incident light source, also be provided with a polar switching device, elder generation through this polar switching device this first dielectric film and this second dielectric film S polarized light and P polarized light can be separated or combination before making this incident ray enter this beam split Multiplexing apparatus.
13, reflective beam split Multiplexing apparatus as claimed in claim 10, it is characterized in that, this incident light source also is provided with a polarity selection component outward, elder generation through this polarity selection component this first dielectric film and this second dielectric film S polarized light and P polarized light can be separated or combination before making this incident ray enter this beam split Multiplexing apparatus.
14, reflective beam split Multiplexing apparatus as claimed in claim 6 wherein also is provided with a polarity selection component before this projection objective, it is preceding earlier through this polarity selection component to make this light enter this projection objective.
15, reflective beam split Multiplexing apparatus as claimed in claim 1, wherein this first dielectric film is made of different plated film conditions with this second dielectric film.
16, reflective beam split Multiplexing apparatus as claimed in claim 1, wherein this first dielectric film and this second dielectric film can with the S polarized light of same light path and the P polarized light separates or the S polarized light and the P polarized light of different light paths combined.
17, reflective beam split Multiplexing apparatus as claimed in claim 2, up and down two the plated film of this diagonal cut that the surface has and plated film that the left and right sides apparent surface has another this diagonal cut can be with the S polarized light of same light path and the P polarized light persons of separating or with the S polarized light and the combination of P polarized light of different light paths relatively to it is characterized in that this cube.
18, reflective beam split Multiplexing apparatus as claimed in claim 1 wherein is selected from one of them of S polarized light and P polarized light respectively by this primaries of two plane of incidence incidents.
19, reflective beam split Multiplexing apparatus as claimed in claim 1, wherein this primaries of this two planes of incidence incident is the S polarized light simultaneously or is the P polarized light simultaneously.
20, reflective beam split Multiplexing apparatus as claimed in claim 1 is that two primitive color lights are that S polarized light and another are the P polarized light by this primaries of this two planes of incidence incident wherein, or two primitive color lights are that P polarized light and another are the S polarized light.
21, reflective beam split Multiplexing apparatus as claimed in claim 1 is used for the optical image projection arrangement, comprises the image projection apparatus of light engine, projector, back projection TV, digital movie image projection apparatus, digitized video emulator etc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2004100065731A CN1560664A (en) | 2004-03-10 | 2004-03-10 | Reflection beam splitting and combining device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2004100065731A CN1560664A (en) | 2004-03-10 | 2004-03-10 | Reflection beam splitting and combining device |
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| Publication Number | Publication Date |
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| CN1560664A true CN1560664A (en) | 2005-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2004100065731A Pending CN1560664A (en) | 2004-03-10 | 2004-03-10 | Reflection beam splitting and combining device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011103807A1 (en) * | 2010-02-26 | 2011-09-01 | 上海丽恒光微电子科技有限公司 | Image projection system and optical path synthesizer thereof |
| CN104469340A (en) * | 2014-12-01 | 2015-03-25 | 深圳凯澳斯科技有限公司 | Stereoscopic video co-optical-center imaging system and imaging method thereof |
-
2004
- 2004-03-10 CN CNA2004100065731A patent/CN1560664A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011103807A1 (en) * | 2010-02-26 | 2011-09-01 | 上海丽恒光微电子科技有限公司 | Image projection system and optical path synthesizer thereof |
| CN102591020A (en) * | 2011-01-12 | 2012-07-18 | 上海丽恒光微电子科技有限公司 | Projection system |
| CN102591020B (en) * | 2011-01-12 | 2014-10-01 | 上海丽恒光微电子科技有限公司 | Projection system |
| CN104469340A (en) * | 2014-12-01 | 2015-03-25 | 深圳凯澳斯科技有限公司 | Stereoscopic video co-optical-center imaging system and imaging method thereof |
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