CN1455272A - Polarized light beam separator - Google Patents
Polarized light beam separator Download PDFInfo
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- CN1455272A CN1455272A CN 02118852 CN02118852A CN1455272A CN 1455272 A CN1455272 A CN 1455272A CN 02118852 CN02118852 CN 02118852 CN 02118852 A CN02118852 A CN 02118852A CN 1455272 A CN1455272 A CN 1455272A
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- polarized light
- light
- aurora
- light beam
- prism unit
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Abstract
The separator comprises the ladder shaped beam splitter prism unit mainly. The anti reflection layer is coated outside the beam splitter prism unit in order to lower reflectivity of light and increase transmissibility of light. A layer of separating polarized light beam is setup on the beam splitter prism unit. Thus, when light beam enter into the beam splitter prism unit, the multiple ladder faces process a large numbers of light beam simultaneously. The polarized light beam separation layer separates the incident light beam into the transmissive P polarized light and the reflected S polarized light. The invention raises the efficiency of using polarized light.
Description
Technical field
The invention relates to a kind of polarized light beam separator, be meant that especially a kind of external form is stepped, can improve the light treatment efficiency, the polarized light beam separator that uses for optical equipment to obtain high-quality polar biased light.
Background technology
The alleged polarized light beam separator (PBS, Polarizing beam splitter) of the present invention is a kind of optical devices that utilize for again of effectively polar biased light being reintegrated, and it is mainly used on the liquid crystal projector structure.Because of light enters the preceding polar biased light that is necessary for of liquid crystal panel (LCD Panel), and see through beam splitting system and be separated into three primary colors, then adjust behind each coloured light colour mixture projection more respectively and penetrate.Only polar biased light is easy to be absorbed by various lens or catoptron the time and causes damage, and causes the service efficiency of polar biased light very low, makes the difficult as expection of demonstration of projector.For this reason, the many device polarized light beam separators of going ahead of the rest before polar biased light enters imaging system of existing optical equipment are increased light usefulness, improve the display effect of projector.
The principle of polarized light beam separator 1 commonly used as shown in Figure 1, it is mainly a kind of polar biased light Amici prism 11, this Amici prism 11 is the cube of single structure, its inside is provided with a polarized light bundle separating layer 12, when injecting light and enter Amici prism, promptly suitably be separated into P aurora and S aurora, wherein these P aurora directly penetrate polarized light bundle separating layer 12 and arrive the opposite, and the S aurora then turn to ejaculation by polarized light bundle separating layer 12.So, penetrate direction at the S aurora one reflection horizon 13 is set again,, can avoid light to scatter and disappear, promote effective utilization the S aurora are directed to identical ejaculation direction with the P aurora.
Aforementioned polarized light beam separator commonly used provides a kind of method that improves the light effective utilization, but its Amici prism 11 only is single cube structure after all, and it is limited that the polar biased light that can reach separates synergy.If strengthen Amici prism 11 sizes,, and be unfavorable for the production of liquid crystal projector because of it is made difficulty, involves great expense.
Hence one can see that, and polarized light beam separator commonly used still has the disappearance expectation to improve, and is not perfect structure.
Summary of the invention
The object of the present invention is to provide a kind of polarized light beam separator,, can in limited space, obtain the light processing configuration of maximum area, be enough to be useful in exquisite day by day projection by the distribution mode of this polarized light beam separator
For achieving the above object, polarized light beam separator provided by the invention comprises:
One stepped Amici prism unit, this Amici prism unit has good light penetration rate, and is provided with a polarized light bundle separating layer in this Amici prism unit, is separated into the P aurora that penetrate and the S aurora of reflection with the light that will inject.
Wherein become stair-stepping Amici prism unit skin to be coated with anti-reflecting layer, can reduce the reflectivity and the penetrance that increases light of light.
Wherein the S aurora of this polarized light bundle separating layer penetrate direction and are provided with a catoptron, and the reflection direction of this catoptron is provided with a polar biased phototransformation device, the S aurora can be converted to the P aurora.
Description of drawings
See also the detailed description and the accompanying drawing thereof of following relevant a preferred embodiment of the present invention, can further understand technology contents of the present invention and purpose effect thereof.The accompanying drawing of relevant this embodiment is:
Fig. 1 is the principle key diagram of polarized light beam separator commonly used;
Fig. 2 is the structural representation of polarized light beam separator of the present invention: and
Fig. 3 is the use illustration of polarized light beam separator of the present invention.
Embodiment
See also Fig. 2, Fig. 3, polarized light beam separator 2 provided by the present invention, mainly include one one-tenth stair-stepping Amici prism unit 21, but make all individual processing polar biased light operations of each cascaded surface of this Amici prism unit 21, again 21 cascaded surfaces handled light in a plurality of Amici prisms unit is integrated to increase the polar biased light transmittance efficiency; This Amici prism unit 21 has good light penetration rate, and is coated with reflection horizon, Hangzhoupro 22 (AR coating, Anti-Reflective Coating) at Amici prism unit 21 skins, can reduce the reflectivity and the penetrance that increases light of light; And in becoming stair-stepping Amici prism unit 21, a polarized light bundle separating layer 13 (PBS Film) is set, and be separated into the P aurora that penetrate and the S aurora of reflection with the light that will inject, finish alleged polarized light bundle separation function; In addition, penetrate direction at the S aurora of this polarized light bundle separating layer and be provided with a catoptron 31, the reflection direction of this catoptron 31 is provided with a polar biased phototransformation device 32, is used for converting the S aurora to the P aurora.
By above setting, the present invention at first must light a light source 4 when practical application, and these light source 4 emitted light see through an optical filter 41 earlier to filter infrared ray or the ultraviolet ray in the light source, guarantee the pure of light; Then light is passed this polarized light beam separator 2, the cascaded surface that sees through a plurality of Amici prisms unit 21 is handled a large amount of light simultaneously, this light is separated into P aurora and S aurora via polarized light bundle separating layer 22, these P aurora directly penetrate polarized light bundle separating layer 22 and arrive the opposite, and these S aurora are then penetrated by polarized light bundle separating layer 22 reflections one angle; The S aurora that penetrate of being partial to turn to and the same direction of P aurora via catoptron 31, convert the S aurora to the P aurora by polar biased phototransformation device 32 again; So, the light after handling via polarized light beam separator 2 of the present invention can significantly improve usefulness, the brightness of light is increased, in order to subsequent job.
Polarized light beam separator provided by the present invention, adopt a stepped Amici prism cell processing light, so can improve the effective utilization of light, a plurality of cascaded surfaces by this Amici prism unit increase processing light area, each cascaded surface can not interfered when separating P aurora and S aurora mutually, and can bring into play effect smoothly.So, the present invention can arrange more prism in limited space, and in response to the requirement of market for the optical articles lightness, the present invention meets the optical equipment development in future really.
Claims (3)
1. polarized light beam separator comprises:
One stepped Amici prism unit, this Amici prism unit has good light penetration rate, and is provided with a polarized light bundle separating layer in this Amici prism unit, is separated into the P aurora that penetrate and the S aurora of reflection with the light that will inject.
2. polarized light beam separator as claimed in claim 1 is characterized in that, is wherein becoming stair-stepping Amici prism unit skin to be coated with anti-reflecting layer, can reduce the reflectivity and the penetrance that increases light of light.
3. polarized light beam separator as claimed in claim 1, it is characterized in that, wherein the S aurora of this polarized light bundle separating layer penetrate direction and are provided with a catoptron, and the reflection direction of this catoptron is provided with a polar biased phototransformation device, the S aurora can be converted to the P aurora.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02118852 CN1455272A (en) | 2002-04-29 | 2002-04-29 | Polarized light beam separator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02118852 CN1455272A (en) | 2002-04-29 | 2002-04-29 | Polarized light beam separator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1455272A true CN1455272A (en) | 2003-11-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02118852 Pending CN1455272A (en) | 2002-04-29 | 2002-04-29 | Polarized light beam separator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1455272A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104428696A (en) * | 2012-06-27 | 2015-03-18 | 3M创新有限公司 | Optical component array |
-
2002
- 2002-04-29 CN CN 02118852 patent/CN1455272A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104428696A (en) * | 2012-06-27 | 2015-03-18 | 3M创新有限公司 | Optical component array |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |