CN2505851Y - Elbow shaped mixed color prism - Google Patents
Elbow shaped mixed color prism Download PDFInfo
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- CN2505851Y CN2505851Y CN 01262930 CN01262930U CN2505851Y CN 2505851 Y CN2505851 Y CN 2505851Y CN 01262930 CN01262930 CN 01262930 CN 01262930 U CN01262930 U CN 01262930U CN 2505851 Y CN2505851 Y CN 2505851Y
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Abstract
The utility model belongs to an elbow shaped mixed color prism for three-plate type single lens colorful projection display equipment. The main technical proposal of the utility model is that a mixed color prism is glued together by three or more than three monocolor prisms which are made of the same materials; the three monocolor prisms are respectively a corner cube prism, a long corner cube prism and a rhomboid prism, wherein, a right angle face of the long corner cube prism and a long face of the rhomboid prism are glued with each other, other right angle face of the long corner cube prism and an inclined face of the corner cube prism are glued with each other; moreover, the right angle is the approximate right angle and the rhombus is the approximate rhombus. The utility model has the advantages of reliable and stable performance and convenient use, etc.
Description
Technical field
The utility model belongs to the elbow colour-mixing prism that the single-lens colour projection of a kind of three-plate type display device is used, and is mainly used in transmission and declines in the optical projection system that the displayed image plate forms, and also can be used for reflecting the optical projection system that the displayed image plate forms that declines.
Background technology
In the three plate looks single-lens colour projection display device, 3 little display boards show the Red Green Blue image of same color image respectively, by colour-mixing prism the image of these three different colours is lumped together again, by being projected on the same screen after the same projection lens amplification, just finished the Projection Display of color image.Since people substituted CRT monitor with display device, many people had designed various projection optical systems.In the process of pursuing high brightness, high-contrast, high definition and targets such as low energy consumption, low cost, paid great effort.Use therein colour mixture optical system is a very important ingredient.Summary is got up, and the colour mixture optical system of using mainly contains following three kinds at present: 1, pure catoptron colour mixture optical system; 2, X block prism colour mixture optical system; 3, Philips three prism colour mixture optical systems.
Above-mentioned various colour mixture optical system all has their own characteristics each, wherein, pure catoptron additive colo(u)r system as shown in Figure 1, the white light that is sent by light source 1 is clipped on R, G, the little display board of B3 piece through being divided into red, green, blue 3 bundle light branches after the colour splitting system 2.The 3 bundle light that see through little display board synthesize a color image through additive colo(u)r system 3 after, again through projection lens 4 enlarging projections to screen 5.This system is mainly used in the projection-type liquid crystal projection display device, the optical element of its additive colo(u)r system is easily manufactured, cost is lower, but to each catoptron fixing, install, debugging has relatively high expectations, the milli machine distortion of catoptron just may cause appreciable impact to image quality.System X prism additive colo(u)r system as shown in Figure 2, structure is compact, required light path is shorter, but manufacturing technology is required very high, thereby cost is very high, Philips three prisms as shown in Figure 3, usually only with reflective micro-display device coupling.
Technology contents
The purpose of this utility model is a kind of elbow colour-mixing prism of design, with simplified structure, reduce cost, improve the stability and the reliability of display device.
To be this colour-mixing prism formed by the single prism gummed of 3 or 3 above same material its main technical schemes.
3 monochromatic prisms are respectively 1 right-angle prism, 1 block length right-angle prism and 1 rhombic prism, right angle face of long right-angle prism and rhombic prism one long gummed mutually, another right angle face of long right-angle prism and the inclined-plane of right-angle prism glue together mutually, and the right angle in described right-angle prism and the long right-angle prism is the approximate right angle that comprises the right angle, and described rhombic prism is the approximate rhombus that comprises rhombus.
The cross section of this colour-mixing prism becomes hexagon; This hexagon has 3 adjacent vertex angles to be approximately equal to 90 °, and all the other 3 drift angles are approximately equal to 135 ° successively, be approximately equal to 45 ° and be approximately equal to 270 °.
At the top angulation at the gummed position of per two prisms drift angle for approximate 90 °; Plate the dichroic dichroic coating on two cemented surfaces therein.
The utility model has the advantages that it installs and fixes convenient and reliable because the elbow colour-mixing prism composes an integral body, be difficult for producing mechanically deform, help guaranteeing the stable and reliable for performance of projection display apparatus.Though the geometrical length of elbow colour-mixing prism light path is close with pure catoptron additive colo(u)r system, but since in the elbow colour-mixing prism medium refraction index of light path generally all more than 1.5, make that the equivalent air layer thickness of light path reduces more than 1/3 than pure catoptron additive colo(u)r system in the elbow colour-mixing prism, this just makes the elbow colour-mixing prism can reduce more than 1/3 to the requirement of projection lens rear cut-off distance, that is to say, not only Stability Analysis of Structures is reliable to adopt the elbow colour-mixing prism, and can increase the field angle of projection display apparatus than pure mirror system significantly.
Each prism of forming the elbow colour-mixing prism all is the most frequently used prism, its processing technology is very ripe, and because elbow colour-mixing prism each color separation face in the colour mixture process all is a complete prism facets, the trouble that this has just been avoided the dichroic coating of X prism to be spliced and to be brought by two prism facets.Elbow colour-mixing prism part processing, plated film or gummed are all much easier than X prism.The elbow colour-mixing prism is also much lower than X prism to each coherence request of forming prism material in addition, thereby the manufacturing cost of elbow colour-mixing prism can significantly descend than X prism, and produces in enormous quantities easily.But, the light path of elbow colour-mixing prism is longer than X prism, thereby also long than X prism to the requirement of projection lens rear cut-off distance.Fortunately in recent years along with the exploitation of reflection type projection equipment, its projection lens rear cut-off distance length is enough to use an X prism to add a PBS polarizing beam splitter mirror again, and such projection lens can use with the additive colo(u)r system of elbow colour-mixing prism fully.
Description of drawings
Fig. 1 is pure catoptron colour mixture optical system diagram.
Fig. 2 is an X block prism colour mixture optical system diagram.
Fig. 3 is Philips three prism additive colo(u)r system figure.
Fig. 4 is a structural drawing of the present utility model.
Fig. 5 is the optical system diagram corresponding to Fig. 4.
Embodiment
This colour-mixing prism is formed by the single prism gummed of 3 same material, the cross section of colour-mixing prism becomes hexagon, it is 90 ° that this hexagon has 3 adjacent vertex angles, and remaining 3 drift angle is followed successively by 135 °, 45 ° and 270 °, and plates the dichroic dichroic coating on two cemented surfaces therein.
3 monochromatic prisms also can be 1 right-angle prism, 1 block length right-angle prism and 1 rhombic prism, right angle face of long right-angle prism and rhombic prism one long gummed mutually, and make a 45 of long right-angle prism and a 45 of rhombic prism form 90 ° of drift angles, another right angle face of long right-angle prism and the inclined-plane of right-angle prism glue together mutually, form the elbow prism, plating two constitutes two to color separation face to dichroic coating on two cemented surfaces.
The light path of this elbow colour-mixing prism in projection optical system seen Fig. 5.Wherein 3 " be the elbow colour-mixing prism.Be coated with the anti-red dichroic dichroic coating that reveals the green at the cemented surface a of elbow colour-mixing prism, that cemented surface b is coated with is red, the dichroic dichroic coating of green anti-indigo plant.Therefore, after the green glow of being propagated by image board G enters the elbow prism, can see through two color separation faces of a, b to the right, penetrate, arrive projection lens from prism the right; After the ruddiness of being propagated downwards by image board R enters the elbow prism, turn back by the reflection of a color separation face and to converge with green glow to the right, see through b color separation face again, penetrate, arrive projection lens from prism the right; After the blue light of being propagated to the right by image board B enters prism, turn back upwards, on b color separation face, reflect again and turn back to the right, converge, together penetrate, the arrival projection lens from prism the right with red, green glow by the total reflection of c color separation face.Article three, the optical path length of light path process in the elbow prism also just in time equates.So the three primary colors image of three image board generations can be projected on the screen by same projection lens, forms a width of cloth color image, thereby colour mixture and the purpose of closing picture have been reached.
Claims (6)
1, a kind of elbow colour-mixing prism is characterized in that this colour-mixing prism is formed by the single prism gummed of 3 or 3 above same material.
2, colour-mixing prism according to claim 1, it is characterized in that 3 monochromatic prisms are respectively 1 right-angle prism, 1 block length right-angle prism and 1 rhombic prism, right angle face of long right-angle prism and rhombic prism one long gummed mutually, another right angle face of long right-angle prism and the inclined-plane of right-angle prism glue together mutually, and the right angle in described right-angle prism and the long right-angle prism is the approximate right angle that comprises the right angle, and described rhombic prism is the approximate rhombus that comprises rhombus.
3, colour-mixing prism according to claim 1 is characterized in that the cross section of this colour-mixing prism becomes hexagon.
4, colour-mixing prism according to claim 1 is characterized in that the cross section of this colour-mixing prism becomes hexagon, and this hexagon has 3 adjacent vertex angles to be approximately equal to 90 °, and all the other 3 drift angles are approximately equal to 135 ° successively, be approximately equal to 45 ° and be approximately equal to 270 °.
5, colour-mixing prism according to claim 1 is characterized in that at the top angulation at the gummed position of per two prisms drift angle for approximate 90 °.
6, colour-mixing prism according to claim 1 is characterized in that plating the dichroic dichroic coating on two cemented surfaces therein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01262930 CN2505851Y (en) | 2001-09-21 | 2001-09-21 | Elbow shaped mixed color prism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01262930 CN2505851Y (en) | 2001-09-21 | 2001-09-21 | Elbow shaped mixed color prism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2505851Y true CN2505851Y (en) | 2002-08-14 |
Family
ID=33670604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01262930 Expired - Fee Related CN2505851Y (en) | 2001-09-21 | 2001-09-21 | Elbow shaped mixed color prism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2505851Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101968574B (en) * | 2009-07-28 | 2012-05-09 | 福建华科光电有限公司 | Polarization conversion color-combination prism |
| CN109061890A (en) * | 2018-09-13 | 2018-12-21 | 东莞铭普光磁股份有限公司 | A kind of beam splitting system |
-
2001
- 2001-09-21 CN CN 01262930 patent/CN2505851Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101968574B (en) * | 2009-07-28 | 2012-05-09 | 福建华科光电有限公司 | Polarization conversion color-combination prism |
| CN109061890A (en) * | 2018-09-13 | 2018-12-21 | 东莞铭普光磁股份有限公司 | A kind of beam splitting system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |