CN205384439U - Laser projection system - Google Patents
Laser projection system Download PDFInfo
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- CN205384439U CN205384439U CN201521134613.0U CN201521134613U CN205384439U CN 205384439 U CN205384439 U CN 205384439U CN 201521134613 U CN201521134613 U CN 201521134613U CN 205384439 U CN205384439 U CN 205384439U
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- mirror
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Abstract
The utility model discloses a laser projection system, include the semiconductor laser diode as the light source, the I of blue P polarization laser scioptics group that semiconductor laser diode sent shines and returns to PBS wavelength selective reflection mirror after direction of propagation process reflective fluorescence colour wheel, lambda / 4 wavelength plates and holophote's the total reflection of light beam behind PBS wavelength selective reflection mirror again, this system is still including the light engine device that lies in PBS wavelength selective reflection mirror side, propagate to the laser beam of PBS wavelength selective reflection mirror and shine on the projecting lens through the light engine device. This system utilizes laser for the characteristics of polarized light, adopts PBS beam split and the technique that the polarized light conversion combined together, makes during blue laser and red green fluorescence is in same light path, and the very big volume that has reduced laser projector optical system has improved laser projector's optics uniformity.
Description
Technical field
This utility model relates to Color Laser Projection Technology field, particularly relates to a kind of laser projection system.
Background technology
The trend of following scialyscope is had become as with the scialyscope that laser is light source, the light source package of laser projection substantially has two kinds, the first, directly with the trichroism laser of RGB for light source, this scheme can accomplish very high brightness (grades of several ten thousand lumens), but with present technology volume can very huge, and laser directly projects dangerous big, so using only as special function occasion fixed installation.The second, fluorescence colour wheel and laser is used to use as light source of projector, but owing to market lacking blue colour fluorescent powder, therefore sending RG light with blue laser excitated fluorescent powder, used as the RG light source of scialyscope by fluorescence, B light then uses laser as light source, laser uses semiconductor laser diode, compared with the first scheme, volume greatly reduces, and equivalent brightness grade substantially can accomplish the volume suitable with conventional projectors.
In civilian and commercially the second " LASER Excited Fluorescence powder luminous " scheme, for main application scheme, the laser projection optical system principle of this scheme is as shown in Figure 1.The blue laser that in Fig. 1, B light is sent by semiconductor laser diode 1 is finally projected on screen through reflective fluorescence colour wheel 4, GDM mirror 5, GDM mirror 6, GDM mirror 7, battery of lens 8, equal optical wand 9, TIR prism 11 and display original set 10 through GDM mirror 3 by battery of lens 2.
The blue laser that B light is sent by semiconductor laser diode 1 by a series of as multiple battery of lens, on the screen that just laser beam can be projected of λ/4 wavelength plate and a series of optics such as completely reflecting mirror, equal optical wand.But RG light and B light are after reflective fluorescence colour wheel, the light path carried out is different, cause volume bigger, and owing to being independent two light paths, because the caused two-way light of mechanism tolerances is when entering equal optical wand, each light path position is different from, and causes that product colour temperature concordance is poor, and this is also the bottleneck that volume is big, colour temperature concordance is poor that current laser projection runs in design and production.
Utility model content
The utility model discloses a kind of laser projection system, including the semiconductor laser diode as light source, the laser beam that described semiconductor laser diode sends returns again to PBS wavelength-selective mirror along the direction of propagation of light beam after exposing to PBS wavelength-selective mirror by battery of lens I after the total reflection of reflective fluorescence colour wheel, λ/4 wavelength plate and completely reflecting mirror；This system also includes the optical engine apparatus being positioned at PBS wavelength-selective mirror side, and described propagation is irradiated on projection lens to the laser beam of PBS wavelength-selective mirror by optical engine apparatus.
Described PBS wavelength-selective mirror includes multiple PBS prism and wave mirror, and the plurality of PBS prism is fixedly installed on the coated surface of wave mirror.
Described optical engine apparatus includes being sequentially arranged the battery of lens II of setting, equal optical wand, TIR prism and display original set, reflexing to the laser beam of PBS wavelength-selective mirror by carrying out all entering TIR prism after light through equal optical wand after battery of lens II, laser beam is irradiated on display original set after TIR prism.
A kind of laser projection system that this utility model provides, utilize the feature that laser is polarized light, adopt the technology that PBS light splitting is combined with polarized light photograph, blue laser and red green fluorescence is made to be in same light path, reduce the volume of laser projection optical system greatly, improve the optical homogeneity of laser projection.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present application or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, the accompanying drawing that the following describes is only some embodiments recorded in the application, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of laser projection system in prior art；
Fig. 2 is the structural representation of laser projection system in this utility model.
Fig. 3 is the structural representation of this utility model PBS wavelength-selective mirror.
Detailed description of the invention
For making the technical solution of the utility model and advantage clearly, below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out clear complete description:
A kind of laser projection system as shown in Figures 2 and 3, it is characterized in that: include the semiconductor laser diode 1 as light source, the blue P polarization laser that semiconductor laser diode 1 sends returns again to PBS wavelength-selective mirror 13 along the direction of propagation of light beam after exposing to PBS wavelength-selective mirror 13 by battery of lens I2 after the total reflection of reflective fluorescence colour wheel 4, λ/4 wavelength plate 14 and completely reflecting mirror 15；This system also includes the optical engine apparatus being positioned at PBS wavelength-selective mirror 13 side, and propagation is irradiated on projection lens 12 to the laser beam of PBS wavelength-selective mirror 13 by optical engine apparatus.The principle of λ/4 wavelength plate 14 is: P polarization light becomes circularly polarized light through later, becomes S-polarization light after again passing by.Due to the red green fluorescence powder part on the reflective fluorescence colour wheel 4 of laser excitation high speed rotating, sending red green fluorescence and reflect through colour wheel disk, laser, then by the glass part on high speed rotating colour wheel, through colour wheel, becomes the blue light that projection is required.
Utility model point of the present utility model is in that the structure of laser light source module is arranged, and adopts PBS wavelength-selective mirror 13 to achieve the effect allowing B light transmission reflect again.The principle of PBS wavelength-selective mirror 13 is: by glued together to PBS prism and wave mirror, P polarization light is through PBS wavelength-selective mirror transmission, S-polarization light and RG light reflect through PBS wavelength-selective mirror, scheme is as shown in Figure 2, PBS wavelength-selective mirror 13 includes multiple PBS prism and wave mirror, and multiple PBS prisms are fixedly installed on the coated surface of wave mirror.
Further, optical engine apparatus includes being sequentially arranged the battery of lens II8 of setting, equal optical wand 9, TIR prism 11 and display original set 10, reflexing to the laser beam of PBS wavelength-selective mirror 13 by carrying out all entering TIR prism 11 after light through equal optical wand 9 after battery of lens II8, laser beam is irradiated on display original set 10 after TIR prism 11.
Embodiment: the blue laser that B light is sent by semiconductor laser diode 1 passes through battery of lens I2, particularity due to laser, laser is line polarized light-P light, through PBS wave mirror 13, reflective fluorescence colour wheel 4 through high speed rotating, return then through completely reflecting mirror 15 through λ/4 wavelength plate 14 and be emitted back towards λ/4 wavelength plate 14, now P light is converted to line polarized light-S light, through the reflective fluorescence colour wheel 4 of high speed rotating then through the reflection of PBS wavelength-selective mirror 13 through battery of lens II8, enter equal optical wand 9, through TIR prism 11, it is irradiated on display original set 10 after TIR, display original set 10 reflects light and is finally projected on screen then through TIR entrance projection lens 12.
Because B light uses same light path with RG light in this utility model, volume can reduce significantly, and the light spot position that can be RGB tri-coloured light when entering optical wand is identical, the concordance of the product colour temperature being greatly improved, and brightness remains unchanged, to sum up 2 point, can have more advantage in the market competition of laser projection.
The above; it is only this utility model preferably detailed description of the invention; but protection domain of the present utility model is not limited thereto; any those familiar with the art is in the technical scope that this utility model discloses; conceive according to the technical solution of the utility model and utility model thereof and be equal to replacement or change, all should be encompassed within protection domain of the present utility model.
Claims (3)
1. a laser projection system, it is characterized in that: include the semiconductor laser diode (1) as light source, the direction of propagation that what described semiconductor laser diode (1) sent send after blue P polarization laser exposes to PBS wavelength-selective mirror (13) by battery of lens I (2) along light beam returns again to PBS wavelength-selective mirror (13) after the total reflection of reflective fluorescence colour wheel (4), λ/4 wavelength plate (14) and completely reflecting mirror (15)；This system also includes the optical engine apparatus being positioned at PBS wavelength-selective mirror (13) side, and described propagation is irradiated on projection lens (12) to the laser beam of PBS wavelength-selective mirror (13) by optical engine apparatus.
2. a kind of laser projection system according to claim 1, is further characterized in that: described PBS wavelength-selective mirror (13) includes multiple PBS prism and wave mirror, and the plurality of PBS prism is fixedly installed on the coated surface of wave mirror.
3. a kind of laser projection system according to claim 1, it is further characterized in that: described optical engine apparatus includes being sequentially arranged the battery of lens II (8) of setting, equal optical wand (9), TIR prism (11) and display original set (10), reflexing to the laser beam of PBS wavelength-selective mirror (13) by carrying out all entering TIR prism (11) after light through equal optical wand (9) after battery of lens II (8), laser beam is irradiated on display original set (10) after TIR prism (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521134613.0U CN205384439U (en) | 2015-12-31 | 2015-12-31 | Laser projection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521134613.0U CN205384439U (en) | 2015-12-31 | 2015-12-31 | Laser projection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205384439U true CN205384439U (en) | 2016-07-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521134613.0U Active CN205384439U (en) | 2015-12-31 | 2015-12-31 | Laser projection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205384439U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106324966A (en) * | 2016-11-18 | 2017-01-11 | 四川长虹电器股份有限公司 | Laser light source illumination system |
| US10459323B2 (en) | 2017-04-14 | 2019-10-29 | Coretronic Corporation | Projector and illumination system thereof |
| US10775689B2 (en) | 2017-06-21 | 2020-09-15 | Coretronic Corporation | Illumination system and projection apparatus |
-
2015
- 2015-12-31 CN CN201521134613.0U patent/CN205384439U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106324966A (en) * | 2016-11-18 | 2017-01-11 | 四川长虹电器股份有限公司 | Laser light source illumination system |
| US10459323B2 (en) | 2017-04-14 | 2019-10-29 | Coretronic Corporation | Projector and illumination system thereof |
| US10775689B2 (en) | 2017-06-21 | 2020-09-15 | Coretronic Corporation | Illumination system and projection apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |