CN101515069B - Total internal reflection color-combination prism and manufacture method - Google Patents
Total internal reflection color-combination prism and manufacture method Download PDFInfo
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- CN101515069B CN101515069B CN2008101008217A CN200810100821A CN101515069B CN 101515069 B CN101515069 B CN 101515069B CN 2008101008217 A CN2008101008217 A CN 2008101008217A CN 200810100821 A CN200810100821 A CN 200810100821A CN 101515069 B CN101515069 B CN 101515069B
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Abstract
The invention provides a total internal reflection color-combination prism, which comprises a first interface, a second interface, a third interface, a fourth interface, a fifth interface, a sixth interface, a seventh interface, an eighth interface, a first surface, a second surface, a third surface, a first incident face, a second incident face, a third incident face and an emergent face, wherein the seventh interface and the eighth interface are crossed and vertical to each other; the seventh interface transmits red light and green light and reflects blue light; the eighth interface transmits the blue light and the green light and reflects the red light; the red light incident from the first incident face is transmitted through the first interface and the fourth interface, and transmitted out of the first surface; the green light incident from the first incident face is transmitted through the second interface and the fifth interface, and is transmitted out of the second surface; the blue light incident from the first incident face is transmitted through the third interface and the sixth interface, and is transmitted out of the third surface; the light incident from the first incident face is reflected by the eighth interface and is emergent from the emergent face; light incident from the third surface is reflected by the seventh interface and is emergent from the emergent face; and light incident from the second surface is directly transmitted by the seventh interface and the eighth interface, and is emergent from the emergent face.
Description
Technical field
The present invention relates to a kind of color-combination prism and preparation method thereof, particularly a kind of DMD that three primary colours light can be incided correspondence, and will synthesize total internal reflection color-combination prism of coloured image and preparation method thereof by the image of DMD output.
Background technology
Optical projection system as shown in Figure 1 for the monolithic DLP that existing market adopted (digital light processing), the white light that bulb 101 sends is through colour wheel 102 back sequential output redgreenblues, light beam is through behind the shimming and relay lens group 104 of optical wand 103, light beam is through total internal reflection prism 105 (Reverse Total Interface Reflection, abbreviation RTIR prism) shines Digital Micromirror Device 106 (Digital Micro-mirror Device after, be called for short DMD) on, handle light beam later through after the projection lens set 107 by DMD106, shine imaging on the screen 108 at last.Because monolithic DLP is to the use of colour wheel 102, white light is during by colour wheel 102, has 2/3rds luminous energy to be wasted, so cause the efficiency of light energy utilization lower.The employed RTIR prism of this optical system, light beam enters in the optical projection system after total internal reflection more earlier by inciding behind the air-gap on the DMD.
Three DLP optical projection systems that existing market adopted as shown in Figure 2, the light that bulb 201 sends at first carries out shimming through optical wand 202, assemble by focus lens group 203 again, then through plane mirror 204 reflections, enter TIR prism 205, the effect of TIR prism 205 is to realize that incident light separates with emergent light, does not disturb mutually, make the incident light total reflection, emergent light sees through.Afterwards, light beam process color separation color-combination prism 206 (color splitting/recombining prism) again makes white light be divided into redgreenblue earlier, and incide respectively on the RGB DMD207,217,227, three-beam closes look more afterwards, by 205 outgoing of TIR prism, pass through imaging again after the projection lens group 208 at last.From Fig. 2 as seen, three DLP optical projection systems have adopted white light to be divided into the method that redgreenblue closes look more earlier, have increased the color separation use of color-combination prism 206 again.And color separation again color-combination prism 206 manufacture craft very the difficulty, Costco Wholesale is also very high, and volume is big, weight is heavier, has occupied most weight of whole DLP optical projection system.And, light path color separation again in the color-combination prism 206 first color separation close look again, light path is complicated and long, so influence drop shadow effect.
In addition, because the white light of light source does not satisfy the requirement of colour balance on spectral distribution,, adopt suppressing portion to divide the way of spectral coverage light to modulate colour balance usually, thereby caused the reduction of the efficiency of light energy utilization in order to satisfy colour balance.And since the deficiency of ruddiness in the bulb also can adopt the problem of selecting wide range to solve ruddiness brightness, and can cause the reduction of color saturation and contrast like this.
Summary of the invention
Therefore, task of the present invention is the deficiency that exists at prior art, proposes a kind of total internal reflection color-combination prism;
Another task of the present invention provides a kind of method for making of total internal reflection color-combination prism.
On the one hand, provide a kind of total internal reflection color-combination prism, comprised the first, second, third, fourth, the 5th, the 6th, the 7th and the 8th interface, first, second, third surface, first, second, third plane of incidence, and exit facet; The described the 7th is intersected with each other vertical with the 8th interface;
Described the 7th interface sees through ruddiness and green glow, to blu-ray reflection; Described the 8th interface sees through blue light and green glow, to reflection to red light;
By the ruddiness of described first plane of incidence incident, transmission successively through the first and the 4th interface after, go out by the first surface transmission;
By the green glow of described second plane of incidence incident, transmission successively through the second and the 5th interface after, go out by the second surface transmission;
By the blue light of described the 3rd plane of incidence incident, transmission successively through the 3rd and the 6th interface after, go out by the 3rd surperficial transmission;
By the light of described first surface incident successively by behind the 4th interface and the 8th boundary reflection by described exit facet outgoing;
By the light of described the 3rd surperficial incident successively by behind the 6th interface and the 7th boundary reflection by described exit facet outgoing;
By the light of described second surface incident earlier by the 5th boundary reflection again through after the 7th interface and the 8th interface transmission by described exit facet outgoing.
In the technique scheme, preferred described the first, the 3rd surface is parallel with exit facet.
Further, preferred described the 3rd surface and exit facet are at grade.
In the technique scheme, preferred described second surface is vertical with described exit facet.
In the technique scheme, the angle at preferred described first surface and described the 8th interface is 135 °.
In the technique scheme, between preferred the described first and the 4th interface, between the second and the 5th interface, all be provided with air-gap between the 3rd and the 6th interface.
Further, the thickness of described air-gap is preferably less than 0.6 millimeter.
Further, described air-gap is arranged on the logical light place of central authorities between the respective interface, is bonded together with the limit or the angle of optical cement with described air-gap both sides respective interface.
Further, preferred the described first and the 4th interface, the second and the 5th interface, the setting parallel to each other of the 3rd and the 6th interface.
Further, between preferred the described first and the 4th interface, the air-gap thickness between between the second and the 5th interface and the 3rd and the 6th interface is identical.
According to a second aspect of the invention, a kind of method of making total internal reflection color-combination prism also is provided, comprise and select the 4th, the the 5th and the 6th right-angle prism, and use optical cement that the right angle face of the right angle face of described three right-angle prisms and the right angle isosceles prism unoccupied place of not leaving a blank each other is glued together fully, form the 7th interface and the 8th interface that intersect mutually and be perpendicular to one another, the inclined-plane of described right angle isosceles prism is as exit facet, wherein, the prism surface of described the 7th interface and both sides, the 8th interface is coated with corresponding antireflective film and high-reflecting film respectively, make the 7th interface pass through to ruddiness and green glow, to blu-ray reflection, and the 8th interface is passed through blue light and green glow, to reflection to red light; The exit facet of described right angle isosceles prism is coated with the broadband antireflective film to visible light;
Also comprise and select first prism, this first prism comprises first plane of incidence and first interface, described the 4th right-angle prism also comprises first surface and the 4th interface, with first interface of first prism and the 4th interface gummed of described the 4th right-angle prism, make and to incide ruddiness in first prism earlier after first interface, the 4th interface and first surface transmission by first plane of incidence, and total reflection takes place in the ruddiness by described first surface input at the 4th interface, and be reflected at the interface the 8th, by described exit facet output; First interface, the 4th interface, first plane of incidence and first surface all are coated with the antireflective film of ruddiness;
Also comprise and select second prism, this second prism comprises second plane of incidence and second contact surface, described the 5th right-angle prism also comprises second surface and the 5th interface, with the second contact surface of second prism and the 5th interface gummed of described the 5th right-angle prism, make and to incide green glow in second prism earlier after second contact surface, the 5th interface and second surface transmission by second plane of incidence, and total reflection takes place in the green glow by described second surface input at the 5th interface, after the 7th and the 8th interface is crossed in transmission, by described exit facet output; Second contact surface, the 5th interface, second plane of incidence and second surface all are coated with the antireflective film of green glow;
Also comprise and select prism, this prism comprises the 3rd plane of incidence and the 3rd interface, described the 6th right-angle prism also comprises the 3rd surface and the 6th interface, with the 3rd interface of prism and the 6th interface gummed of described the 6th right-angle prism, make and to incide blue light in the prism earlier after the 3rd interface, the 6th interface and the 3rd surperficial transmission by the 3rd plane of incidence, and total reflection takes place in the blue light by described the 3rd surface input at the 6th interface, and be reflected at the interface the 7th, by described exit facet output; The 3rd interface, the 6th interface, the 3rd plane of incidence and the 3rd surface all are coated with the antireflective film of blue light.
In the technique scheme, preferred described first is parallel with exit facet with the 3rd surface.
Further, preferred described the 3rd surface and exit facet are at grade.
In the technique scheme, preferred described second surface is vertical with described exit facet.
In the technique scheme, the angle at preferred described first surface and described the 8th interface is 135 °.
In the technique scheme, preferred described first, second adopts the glass material of the identical trade mark with prism, and described the 4th, the 5th, the 6th right-angle prism and described right angle isosceles prism adopt the glass material of the identical trade mark.
In the technique scheme, preferred described first, second structure with prism is identical, and the described the 4th, the 5th is identical with the structure of the 6th right-angle prism.A kind of preferred structure is that described the 4th, the 5th and the 6th right-angle prism is four prisms, and two adjacent corner angle are 90 degree, and two other corner angle are respectively 45 degree and 135 and spend.
In the technique scheme, preferably between the described first and the 4th interface, between the second and the 5th interface, between the 3rd and the 6th interface air-gap is set.
Further, the thickness of described air-gap is preferably less than 0.6 millimeter.
In the technique scheme, described air-gap is arranged on the logical light place of central authorities between the respective interface, and is bonded together with the limit or the angle of optical cement with described air-gap both sides respective interface.
Further, preferred the described first and the 4th interface, the second and the 5th interface, the setting parallel to each other of the 3rd and the 6th interface.
Further, between preferred the described first and the 4th interface, the air-gap thickness between the second and the 5th interface, between the 3rd and the 6th interface is identical.
In the technique scheme, form the 7th identical or close with the refractive index of the refractive index and the 4th, the 5th of the employed optical cement in the 8th interface, the 6th and the 7th prism.
Further, the relative index of refraction of described optical cement and the 4th, the 5th, the 6th and the 7th prism material is 0.98-1.02.
Above-mentioned total internal reflection color-combination prism can be applied in three DLP optical projection systems.
Total internal reflection color-combination prism of the present invention is used for three DLP optical projection systems, and advantage is as follows:
1. use total internal reflection color-combination prism of the present invention, be not only applicable to the optical projection system that look is closed in traditional color separation again, equally also go for the situation of independent illumination.Especially use the method for independent illumination, can make optical projection system save the color separation link of white light, simplified the light path of DLP optical projection system effectively, thereby made system design easier, reduced optical loss, improved the efficiency of light energy utilization;
2. with the present high complicated prism devices of cost, for example look separates and the look synthetic prisms is compared, and the present invention has not only reduced the volume and weight of DLP optical projection system effectively, reduced cost, shorten light path simultaneously, reduced the complicacy of light path, strengthened the effect of optical projection system.
3. if take the method for independent illumination, the power demand of RGB light source or other colour light sources can recently reasonably be set according to the white light luminous intensity distribution, not only avoided because not enough employing of ruddiness selected the color saturation that wide range causes and the reduction of contrast, and avoided the waste of luminous energy, luminous energy is fully changed utilization.
4. the optical projection system of use total internal reflection color-combination prism of the present invention has the advantage of tangible high integration than existing DLP technology in projection systems, traditional TIR prism or RTIR prism have been saved, total internal reflection color-combination prism of the present invention not only can be realized the function of traditional TIR prism but also can realize closing the look function, thereby make the structure of optical projection system more compact, therefore volume dwindles, therefore weight also alleviates, and cost is also corresponding is reduced.
5. because light beam is first by inciding behind the air-gap on the DMD, after total internal reflection, enter in the optical projection system again, so the air-gap among the present invention appears in the illuminator, appear in the imaging system with air-gap and to compare, greatly reduce the index request of air-gap, not only make prism processing easier, deducted the randomness and the heterogeneity of optical path modulation process, make optical path modulation more easy, and improved image quality significantly.
Therefore, the present invention is effective way and the method that realizes three DLP low costs, high-level efficiency, high Projection Display effect, has the very high practical value and the value of large-scale production in the projection display technique field.
Description of drawings
Below, describe embodiments of the invention in conjunction with the accompanying drawings in detail, wherein:
Fig. 1 is the light path synoptic diagram of conventional one-piece DLP optical projection system;
Fig. 2 is the light path synoptic diagram of three DLP optical projection systems of tradition;
Fig. 3 is the structural representation of total internal reflection color-combination prism;
Fig. 4 is three DLP optical projection system installation drawings of independent illumination;
Fig. 5 is a kind of laser projection system synoptic diagram of independent illumination;
Fig. 6 is a kind of LED optical projection system synoptic diagram of independent illumination.
Embodiment
Below in conjunction with accompanying drawing the present invention is carried out detailed explanation and explanation.
Fig. 3 is a kind of structural representation of total internal reflection color-combination prism.This total internal reflection color-combination prism is formed by seven prism gummeds.Wherein, first, second and prism 301,302 and 303 is the identical triangular prism of structure, and the convenience for processing adopts right-angle prism usually, the acute angle angle is according to the material of the concrete prism of selecting in the actual design and different, certainly, can adopt the prism of other shapes fully, wherein according to specific requirement, in first, second, third prism, hypotenuse place face is the plane of incidence; Four, the 5th and the 6th prism 304,305 and 306 is four identical prisms of structure, and two adjacent right angles are arranged, and also has one 135 degree angle, and the right angle adjacent with 135 degree angles is the isosceles right angle in the 4th, the 5th and the 6th prism 304,305,306 simultaneously; The 7th prism 307 is an isosceles right angle trigonometry prism, and the isosceles right-angle side of its isosceles right-angle side and the 4th, the 5th, the 6th prism 304,305,306 equates.
By the optical cement order that the isosceles right angle face of the 4th to the 7th prism unoccupied place of not leaving a blank is glued together fully, and its isosceles right angle rib is overlapped each other, do not interspace at the place, point of crossing, center of these four prisms as much as possible simultaneously, or the space should be controlled at micron dimension at least or below it, as shown in Figure 3.
Thereby, form cross one another the 7th vertical interface 308 (comprising the first sub-interface 308a and the second sub-interface 308b) and the 8th interface 309 (comprising the 3rd sub-interface 309a and the 4th sub-interface 309b).In addition, first material to prism adopts the glass material of the identical trade mark, the material of the 4th to the 7th prism adopts the glass material of the identical trade mark, the optical cement refractive index that adopts should be identical with the refractive index of the 4th, the 5th, the 6th, the 7th prism or close, and the relative index of refraction of optical cement and the 4th, the 5th, the 6th, the 7th prism material is 0.98-1.02.
Face with rib place, first prism, 301 long right angle is glued on the face at the 4th prism 304 the longest edge places then, not being to glue together fully between two faces, is the part gummed, promptly will not glue together in the transparent zone territory of cemented surface central authorities, thereby remain with air-gap, thickness generally should be less than 0.6 millimeter.Form the first interface 301b between this air-gap and first prism, form the 4th interface 304a between air-gap and the 4th prism.And the used optical cement of gummed around the transparent zone territory can be and the identical or close optical cement of the first or the 4th prismatic refraction rate also can adopt other optical cements.In like manner, second prism and prism are glued together with pentaprism and the 6th prism respectively, form second contact surface 302b and the 5th interface 305a, the 3rd interface 303b and the 6th interface 306a.Wherein, the prism surface that forms first to the 6th interface be coated with respectively to the antireflective film by light.The plane of incidence of the light of first, second and prism is respectively first, second and the 3rd plane of incidence 301a, 302a and 303a, and its surface is coated with the antireflective film to incident ray respectively.Four, first, second of the 5th and the 6th prism and the 3rd surperficial 304b, 305b, 306b are coated with the antireflective film to incident ray respectively.
When ruddiness from first plane of incidence 301a incident, green glow is from second plane of incidence 302a incident, blue light is during from the 3rd plane of incidence 303a incident, forms the respective face of the 4th, the 7th prism of the first sub-interface 308a and the respective face that forms the 5th, the 6th prism of the second sub-interface 308b and then is coated with the antireflective film of continuous green glow and ruddiness and the high-reflecting film of blue light; Form the 3rd sub-interface 309a the 4th, the respective face of pentaprism and the respective face that forms the 6th, the 7th prism of the 4th sub-interface 309b be coated with the antireflective film of continuous green glow and blue light and the high-reflecting film of ruddiness.The exit facet 307c of the 7th prism is coated with the broadband antireflective film to visible light.Usually green glow all is from second plane of incidence 302a incident, the incoming position of blue light and ruddiness then can exchange mutually, and when the place-exchange of blue light and ruddiness, the also corresponding change of plated film, be equivalent to current system is overturn along transverse axis, this is understandable to those skilled in the art.
The incident angle of incident beam on first, second, third interface of first, second, third prism must be less than the angle of total reflection of respective prisms, to guarantee that the incident beam transmission is by this interface; By first, second and the 3rd surperficial 304b, 305b, the the 4th, the 5th, the 6th interface 304a, the incident angle on 305a, the 306a that 306b incides the 4th, the 5th, the 6th prism must produce total reflection to guarantee incident light at this interface greater than the angle of total reflection of respective prisms.
As a preferred embodiment, the Chinese trade mark of all the prism glass materials among Fig. 3 is selected F1 for use, and its refractive index is 1.60.The acute angles beta of first, second and prism is 21 °, and α is 90 °.Air-gap thickness between the described first and the 4th interface, the second and the 5th interface, the 3rd and the 6th interface is 0.3 millimeter.It is parallel with exit facet 307c to constitute first surface 304b at last, and the 3rd surperficial 306b and exit facet 307c are at grade; Second surface 305b is vertical with exit facet 307c; Second surface 305b is vertical with first surface 304b; The angle at first surface 304b and the 8th interface 309 is 135 °.
Certainly, as previously mentioned, according to different DMD and the actual needs that use, those skilled in the art can also use the prism of other different angles according to above-described principle.
Fig. 4 has provided a kind of installation drawing that uses independent three DLP optical projection systems of throwing light on of total internal reflection color-combination prism shown in Figure 3, comprise RGB light supply apparatus 421,422,423, the DMD411 of RGB light correspondence, 412,413, total internal reflection color-combination prism 310, projection lens set 414 and projection screen 415; Wherein, RGB light DMD411,412,413 all use the DMD of 0.7DDR12, and ruddiness DMD411 is set in parallel in outside the first surface 304b of total internal reflection color-combination prism 310, green glow DMD412 is set in parallel in outside the second surface 305b of total internal reflection color-combination prism 310, and blue light DMD413 is set in parallel in outside the 3rd surperficial 306b of total internal reflection color-combination prism 310.Total internal reflection color-combination prism 310 adopts structure shown in Figure 3, and the Chinese trade mark of prism glass material is selected F1 for use.
The ruddiness of described red-light source device 421 outputs in first plane of incidence 301a of first prism 301 with 16 ° of incident angle incidents, because the incident angle on first interface is less than the angle of total reflection, so be transmitted to air-gap through the first interface 301b, incide the 4th prism 304 by air-gap through the 4th interface 304a again, shine the ruddiness DMD411 from first surface 304b, incide in the 4th prism 304 by first surface 304b once more through the light beam after the ruddiness DMD411 reflection, light beam when arriving the 4th interface 304a since incident angle greater than the angle of total reflection experiences total internal reflection, the reflected light transmission is by the 7th interface 308, after 309 reflections of the 8th interface, enter the 7th prism 307, at last by exit facet 307c outgoing;
The green glow of described green-light source device 422 outputs in second plane of incidence 302a of second prism 302 with 16 ° of incident angle incidents, because the incident angle on second contact surface is less than the angle of total reflection, so be transmitted to air-gap through second contact surface 302b, incide pentaprism 305 by air-gap through the 5th interface 305a again, shine the green glow DMD412 from second surface 305b, incide in the pentaprism 305 by second surface 305b once more through the light beam after the green glow DMD412 reflection, light beam when arriving the 5th interface 305a since incident angle greater than the angle of total reflection experiences total internal reflection, reflected light enters the 7th prism 307 after seeing through the 7th interface 308 and the 8th interface 309, at last by exit facet 307c outgoing;
The blue light of described blue light source device 423 outputs in the 3rd plane of incidence 303a of prism 303 with 16 ° of incident angle incidents, because the incident angle on the 3rd interface is less than the angle of total reflection, so be transmitted to air-gap through the 3rd interface 303b, incide the 6th prism 306 by air-gap through the 6th interface 306a again, shine the blue light DMD413 from the 3rd surperficial 306b, incide in the 6th prism 306 by the 3rd surperficial 306b once more through the light beam after the blue light DMD413 reflection, light beam when arriving the 6th interface 306a since incident angle greater than the angle of total reflection experiences total internal reflection, the reflected light transmission is by the 8th interface 309, after 308 reflections of the 7th interface, enter the 7th prism 307, at last by exit facet 307c outgoing;
Wherein, the 7th interface 308 is coated with the antireflective film of green glow and ruddiness and the high-reflecting film of blue light, and the 8th interface 309 is coated with the antireflective film of green glow and blue light and the high-reflecting film of ruddiness; First plane of incidence 301a, the first interface 301b, the 4th interface 304a and first surface 304b all are coated with the ruddiness antireflective film, second plane of incidence 302a, second contact surface 302b, the 5th interface 305a and second surface 305b all are coated with the green glow antireflective film, and the 3rd plane of incidence 303a, the 3rd interface 303b, the 6th interface 306a and the 3rd surperficial 306b all are coated with the blue light antireflective film; The exit facet 307c of the 7th prism 307 is coated with the broadband antireflective film of visible light.
Above three DMD beam reflected in total internal reflection color-combination prism 310, realized closing bundle, be shown on the projection screen 415 by the output optical projection of projection lens set 414 again total internal reflection color-combination prism.
Those skilled in the art should understand, first to the 7th prism adopts identical trade mark glass material in this specific embodiment, but in fact, adopt the glass material of the identical trade mark as long as satisfy first, second with prism, four, the 5th, the 6th right-angle prism adopts the glass material of the identical trade mark to get final product with described right angle isosceles prism, and just the material of first, second, third prism can be different with the material of the 4th, the 5th, the 6th and the 7th prism.In addition, DMD model that provides in the present embodiment and specification are as an example, and unrestricted, in fact, in the present embodiment, can use the DMD of nearly all model and specification.
Fig. 5 has provided a kind of laser projection system of independent illumination, on the light path between red, green, blue three look LASER Light Source 510,520,530 and the total internal reflection color-combination prism 310, be sequentially with red, green, blue condenser lens 511 in this system, 521,531, red, green, blue integrating rod 512,522,532 and red, green, blue relay lens group 513,523,533, other devices are identical with Fig. 4 with structure.
Fig. 6 has provided a kind of LED optical projection system synoptic diagram of independent illumination, wherein, three primary light source uses red, green, blue led light source device 601,602,603, and on the light path between each light source and the total internal reflection color-combination prism 310, be sequentially with red, green, blue light beam orthopedic systems 611,621,631 and red, green, blue relay lens group 612,622,632, other devices are identical with Fig. 4 with structure.
Can also take other modes that three coloured light are coupled into total internal reflection color-combination prism at various lasers and LED.In addition, three coloured light can be redgreenblue, also can select other three-color light sources as required.In addition, total internal reflection color-combination prism of the present invention also can be used for the DLP illuminator of traditional white light source, after the color separation, re-uses total internal reflection color-combination prism of the present invention and closes look according to the conventional method.
Above in the projection display system of each embodiment, the air-gap thickness of total internal reflection color-combination prism can suitably regulated below 0.6 millimeter as required, preferred scope is between 0.2 to 0.6 millimeter.Those of ordinary skills are to be understood that, under the situation that does not change each interface and function of surface and effect, can carry out various distortion to the foregoing description, for example the angle of each prism of appropriate change, use multilist face more prism, carry out various plated films etc., all should be within claim scope of the present invention.
Claims (22)
1. a total internal reflection color-combination prism comprises the first, second, third, fourth, the 5th, the 6th, the 7th and the 8th interface, first, second, third surface, first, second, third plane of incidence, and exit facet;
Described the 7th interface sees through ruddiness and green glow, to blu-ray reflection; Described the 8th interface sees through blue light and green glow, to reflection to red light; Described the 7th interface is vertical mutually with the 8th interface;
By the ruddiness of described first plane of incidence incident, transmission successively through the first and the 4th interface after, go out by the first surface transmission;
By the green glow of described second plane of incidence incident, transmission successively through the second and the 5th interface after, go out by the second surface transmission;
By the blue light of described the 3rd plane of incidence incident, transmission successively through the 3rd and the 6th interface after, go out by the 3rd surperficial transmission;
By the ruddiness of described first surface incident successively by behind the 4th interface and the 8th boundary reflection by described exit facet outgoing;
By the blue light of described the 3rd surperficial incident successively by behind the 6th interface and the 7th boundary reflection by described exit facet outgoing;
By the green glow of described second surface incident earlier through the 5th boundary reflection again through after the 7th interface and the 8th interface transmission by described exit facet outgoing;
Described the first, second, third, fourth, the 5th, the 6th, the 7th and the 8th interface, first, second, third surface, first, second, third plane of incidence, and exit facet constitutes as follows: select three right angle four prisms as the 4th, the 5th and the 6th prism, the described the 4th, the 5th is the identical right angle of structure four prisms with the 6th prism, and two adjacent right angles are arranged, also have one 135 degree angle, the right angle adjacent with 135 degree angles is the isosceles right angle in the 4th, the 5th and the 6th prism simultaneously; Use optical cement that the isosceles right angle face of the isosceles right angle face of described three right angle four prisms and the right angle isosceles prism unoccupied place of not leaving a blank each other is glued together fully, form the 7th interface and the 8th interface that intersect mutually and be perpendicular to one another, the inclined-plane of described right angle isosceles prism is as exit facet, wherein, the prism surface of described the 7th interface and both sides, the 8th interface is coated with corresponding antireflective film and high-reflecting film respectively, make the 7th interface pass through to ruddiness and green glow, to blu-ray reflection, and the 8th interface is passed through blue light and green glow, to reflection to red light; The exit facet of described right angle isosceles prism is coated with the broadband antireflective film to visible light, and in the gummed of the 4th, the 5th and the 6th prism and right angle isosceles prism, per two right angle faces glued together overlap fully;
Select a prism as first prism, the one side of this first prism is as first plane of incidence, the on-right angle face of described the 4th right-angle prism is as first surface, with described first prism and described the 4th right-angle prism gummed, the cemented surface of described first prism overlaps fully with the cemented surface of described the 4th right-angle prism, remain with air-gap at cemented surface, form first interface between this air-gap and first prism, form the 4th interface between this air-gap and the 4th prism; Make and to incide ruddiness in first prism earlier after first interface, the 4th interface and first surface transmission by first plane of incidence, and total reflection takes place in the ruddiness by described first surface input at the 4th interface, and be reflected at the interface the 8th, by described exit facet output; First interface, the 4th interface, first plane of incidence and first surface all are coated with the antireflective film of ruddiness;
Select a prism as second prism, the one side of this second prism is as second plane of incidence, the on-right angle face of described the 5th right-angle prism is as second surface, with described second prism and described the 5th right-angle prism gummed, the cemented surface of described second prism overlaps fully with the cemented surface of described the 5th right-angle prism, remain with air-gap at cemented surface, form second contact surface between this air-gap and second prism, form the 5th interface between this air-gap and the pentaprism; Make and to incide green glow in second prism earlier after second contact surface, the 5th interface and second surface transmission by second plane of incidence, and total reflection takes place in the green glow by described second surface input at the 5th interface, after the 7th and the 8th interface is crossed in transmission, by described exit facet output; Second contact surface, the 5th interface, second plane of incidence and second surface all are coated with the antireflective film of green glow;
Select a prism as prism, the one side of this prism is as the 3rd plane of incidence, the on-right angle face of described the 6th right-angle prism is as the 3rd surface, with described prism and described the 6th right-angle prism gummed, the cemented surface of described prism overlaps fully with the cemented surface of described the 6th right-angle prism, remain with air-gap at cemented surface, form the 3rd interface between this air-gap and the prism, form the 6th interface between this air-gap and the 6th prism; Make and to incide blue light in the prism earlier after the 3rd interface, the 6th interface and the 3rd surperficial transmission by the 3rd plane of incidence, and total reflection takes place in the blue light by described the 3rd surface input at the 6th interface, and be reflected at the interface the 7th, by described exit facet output; The 3rd interface, the 6th interface, the 3rd plane of incidence and the 3rd surface all are coated with the antireflective film of blue light.
2. total internal reflection color-combination prism according to claim 1 is characterized in that, described the first, the 3rd surface is parallel with exit facet.
3. total internal reflection color-combination prism according to claim 1 is characterized in that described second surface is vertical with described exit facet.
4. total internal reflection color-combination prism according to claim 1 is characterized in that, the angle at described first surface and described the 8th interface is 135 °.
5. total internal reflection color-combination prism according to claim 1 is characterized in that, between the described first and the 4th interface, between the second and the 5th interface, all be provided with air-gap between the 3rd and the 6th interface.
6. total internal reflection color-combination prism according to claim 5 is characterized in that the thickness of described air-gap is less than 0.6 millimeter.
7. total internal reflection color-combination prism according to claim 5 is characterized in that, described air-gap is arranged on the logical light place of central authorities between the respective interface, and is bonded together with the limit or the angle of optical cement with described air-gap both sides respective interface.
8. total internal reflection color-combination prism according to claim 5 is characterized in that, the air-gap thickness between the described first and the 4th interface, between between the second and the 5th interface and the 3rd and the 6th interface is identical.
9. total internal reflection color-combination prism according to claim 1 is characterized in that, the described first and the 4th interface, the second and the 5th interface, the setting parallel to each other of the 3rd and the 6th interface.
10. method of making total internal reflection color-combination prism, select three right angle four prisms as the 4th, the 5th and the 6th prism, the described the 4th, the 5th is the identical right angle of structure four prisms with the 6th prism, and two adjacent right angles are arranged, also have one 135 degree angle, the right angle adjacent with 135 degree angles is the isosceles right angle in the 4th, the 5th and the 6th prism simultaneously; Use optical cement that the isosceles right angle face of the isosceles right angle face of described three right angle four prisms and the right angle isosceles prism unoccupied place of not leaving a blank each other is glued together fully, form the 7th interface and the 8th interface that intersect mutually and be perpendicular to one another, the inclined-plane of described right angle isosceles prism is as exit facet, wherein, the prism surface of described the 7th interface and both sides, the 8th interface is coated with corresponding antireflective film and high-reflecting film respectively, make the 7th interface pass through to ruddiness and green glow, to blu-ray reflection, and the 8th interface is passed through blue light and green glow, to reflection to red light; The exit facet of described right angle isosceles prism is coated with the broadband antireflective film to visible light, and in the gummed of the 4th, the 5th and the 6th prism and right angle isosceles prism, per two right angle faces glued together overlap fully;
Select a prism as first prism, the one side of this first prism is as first plane of incidence, the on-right angle face of described the 4th right-angle prism is as first surface, with described first prism and described the 4th right-angle prism gummed, the cemented surface of described first prism overlaps fully with the cemented surface of described the 4th right-angle prism, remain with air-gap at cemented surface, form first interface between this air-gap and first prism, form the 4th interface between this air-gap and the 4th prism; Make and to incide ruddiness in first prism earlier after first interface, the 4th interface and first surface transmission by first plane of incidence, and total reflection takes place in the ruddiness by described first surface input at the 4th interface, and be reflected at the interface the 8th, by described exit facet output; First interface, the 4th interface, first plane of incidence and first surface all are coated with the antireflective film of ruddiness;
Select a prism as second prism, the one side of this second prism is as second plane of incidence, the on-right angle face of described the 5th right-angle prism is as second surface, with described second prism and described the 5th right-angle prism gummed, the cemented surface of described second prism overlaps fully with the cemented surface of described the 5th right-angle prism, remain with air-gap at cemented surface, form second contact surface between this air-gap and second prism, form the 5th interface between this air-gap and the pentaprism; Make and to incide green glow in second prism earlier after second contact surface, the 5th interface and second surface transmission by second plane of incidence, and total reflection takes place in the green glow by described second surface input at the 5th interface, after the 7th and the 8th interface is crossed in transmission, by described exit facet output; Second contact surface, the 5th interface, second plane of incidence and second surface all are coated with the antireflective film of green glow;
Select a prism as prism, the one side of this prism is as the 3rd plane of incidence, the on-right angle face of described the 6th right-angle prism is as the 3rd surface, with described prism and described the 6th right-angle prism gummed, the cemented surface of described prism overlaps fully with the cemented surface of described the 6th right-angle prism, remain with air-gap at cemented surface, form the 3rd interface between this air-gap and the prism, form the 6th interface between this air-gap and the 6th prism; Make and to incide blue light in the prism earlier after the 3rd interface, the 6th interface and the 3rd surperficial transmission by the 3rd plane of incidence, and total reflection takes place in the blue light by described the 3rd surface input at the 6th interface, and be reflected at the interface the 7th, by described exit facet output; The 3rd interface, the 6th interface, the 3rd plane of incidence and the 3rd surface all are coated with the antireflective film of blue light.
11. method according to claim 10 is characterized in that, described first is parallel with exit facet with the 3rd surface.
12. method according to claim 10 is characterized in that, described second surface is vertical with described exit facet.
13. method according to claim 10 is characterized in that, the angle at described first surface and described the 8th interface is 135 °.
14. method according to claim 10 is characterized in that, described first, second adopts the glass material of the identical trade mark with prism, and described the 4th, the 5th, the 6th right-angle prism and described right angle isosceles prism adopt the glass material of the identical trade mark.
15. method according to claim 10 is characterized in that, described first, second structure with prism is identical, and the described the 4th, the 5th is identical with the structure of the 6th right-angle prism.
16. method according to claim 15 is characterized in that, described the 4th, the 5th and the 6th right-angle prism is four prisms, and two adjacent corner angle are 90 degree, and two other corner angle are respectively 45 degree and 135 and spend.
17. method according to claim 10 is characterized in that, between the described first and the 4th interface, between the second and the 5th interface, between the 3rd and the 6th interface air-gap is set.
18. method according to claim 17 is characterized in that, the thickness of described air-gap is less than 0.6 millimeter.
19. method according to claim 17 is characterized in that, described air-gap is arranged on the logical light place of central authorities between the respective interface, and is bonded together with the limit or the angle of optical cement with described air-gap both sides respective interface.
20. method according to claim 17 is characterized in that, the air-gap thickness between the described first and the 4th interface, between between the second and the 5th interface and the 3rd and the 6th interface is identical.
21. method according to claim 10 is characterized in that, the described first and the 4th interface, the second and the 5th interface, the setting parallel to each other of the 3rd and the 6th interface.
22. a projection display system is characterized in that, comprises each described total internal reflection color-combination prism of claim 1-9.
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| CN108534074A (en) * | 2018-05-15 | 2018-09-14 | 苏州大学 | A kind of big prism daylighting module |
| CN111103744B (en) * | 2018-10-26 | 2022-09-23 | 深圳光峰科技股份有限公司 | Display device and display system |
| WO2024038749A1 (en) * | 2022-08-18 | 2024-02-22 | パナソニックＩｐマネジメント株式会社 | Image generation unit and projection-type image display device |
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| US6330114B1 (en) * | 1999-01-20 | 2001-12-11 | Samsung Electronics Co., Ltd. | Color mixing apparatus for reflective displays facilitating design of projection lens |
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| CN101047864A (en) * | 2006-03-29 | 2007-10-03 | 精工爱普生株式会社 | Modulation apparatus and projector |
| CN201188152Y (en) * | 2008-02-22 | 2009-01-28 | 北京中视中科光电技术有限公司 | Whole-inner-reflection color-combining prism |
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| US6330114B1 (en) * | 1999-01-20 | 2001-12-11 | Samsung Electronics Co., Ltd. | Color mixing apparatus for reflective displays facilitating design of projection lens |
| CN1402043A (en) * | 2001-08-10 | 2003-03-12 | 浙江大学 | Polarization color splitting and mixing system of liquid crystal projector using reflection liquid crystal board as picture source |
| EP1558041A2 (en) * | 2003-12-31 | 2005-07-27 | Lg Electronics Inc. | Lighting optical system |
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