CN108803222A - Polarization type Multiplexing apparatus and laser projection - Google Patents
Polarization type Multiplexing apparatus and laser projection Download PDFInfo
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- CN108803222A CN108803222A CN201810824090.4A CN201810824090A CN108803222A CN 108803222 A CN108803222 A CN 108803222A CN 201810824090 A CN201810824090 A CN 201810824090A CN 108803222 A CN108803222 A CN 108803222A
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- 230000010287 polarization Effects 0.000 title claims abstract description 109
- 230000005540 biological transmission Effects 0.000 claims description 7
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical group [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 17
- 238000000034 method Methods 0.000 description 8
- 239000000243 solution Substances 0.000 description 8
- 239000000843 powder Substances 0.000 description 6
- 230000000644 propagated effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000002310 reflectometry Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 125000001475 halogen functional group Chemical group 0.000 description 2
- 230000031700 light absorption Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2073—Polarisers in the lamp house
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
- G02B27/283—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising used for beam splitting or combining
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
- G02B27/286—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising for controlling or changing the state of polarisation, e.g. transforming one polarisation state into another
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2033—LED or laser light sources
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2033—LED or laser light sources
- G03B21/204—LED or laser light sources using secondary light emission, e.g. luminescence or fluorescence
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Projection Apparatus (AREA)
- Polarising Elements (AREA)
Abstract
A kind of polarization type Multiplexing apparatus of present invention offer and laser projection, polarization type Multiplexing apparatus include light source, polarization spectroscope, the first lens group, fluorescent wheel and quarter-wave plate.Light source is used to send out the first light beam along the first paths；Polarization spectroscope is set in the first light path, and the first light beam is reflected or transmitted from polarization spectroscope to form the second light beam along the second paths, and the second light beam is the first molded line polarised light；First lens group is set in the second light path, and the second light beam passes through the first lens group to form third light beam along the second light path；Fluorescent wheel is set in the second light path；Quarter-wave plate is set between the first lens group and fluorescent wheel, and third light beam advances along third light path after passing through quarter-wave plate to be incident to fluorescent wheel and passes through quarter-wave plate to form the 4th light beam, and the 4th light beam is along third light path across the first lens group.The polarization type Multiplexing apparatus of the present invention can improve light transfer efficiency, reduce energy loss.
Description
Technical field
The present invention relates to a kind of polarization type Multiplexing apparatus, the polarization type that can especially improve laser beam transfer efficiency closes
Electro-optical device and apply its laser projection.
Background technology
Laser projection be it is a kind of using laser beam come the device of projection image, main operational principle is：To have
The laser beam (such as blue laser beams) of specific wavelength beats echo area in fluorescent wheel and phosphor region formed required blue light,
Then red light and green light carry out light combination process formation to blue light, red light and green light using Multiplexing apparatus and need to throw
The picture penetrated.Existing Multiplexing apparatus is relatively low to the transfer efficiency of laser beam, leads to the picture of corresponding laser projection projection
It is not clear enough.
Invention content
In view of the problems of the prior art, the purpose of the present invention is to provide a kind of polarization type Multiplexing apparatus and laser projections
Machine can improve the transfer efficiency of laser beam, reduce the energy loss of laser beam.
In order to achieve the above object, the present invention proposes a kind of polarization type Multiplexing apparatus, including：
Light source, for sending out the first light beam along the first paths；
Polarization spectroscope is set in first light path, which reflects from the polarization spectroscope or transmit with shape
At the second light beam along the second paths, which is the first molded line polarised light；
First lens group is set in second light path, which passes through first lens group along second light path
To form third light beam；
Fluorescent wheel is set in second light path；And
Quarter-wave plate is set between first lens group and the fluorescent wheel, the third light beam pass through this four/
One wave plate be incident to the fluorescent wheel and from the fluorescent wheel reflection after advance along third light path and pass through the quarter-wave plate with
The 4th light beam is formed, the 4th light beam passes through first lens group along the third light path.
As optional technical solution, the third light path is opposite with the path overlap of second light path and direction.
As optional technical solution, which there is the first echo area, the third light beam to pass through the quarter-wave
Piece is advanced and then is worn along the third light path after being incident to first echo area of the fluorescent wheel and being reflected from first echo area
The quarter-wave plate is crossed to form the 4th light beam, the 4th light beam is second type linearly polarized light, the first molded line polarised light
It is different from the second type linearly polarized light.
As optional technical solution, which has opposite first surface and second surface, the third
Light beam is the first molded line polarised light, which passes through the quarter-wave from the first surface of the quarter-wave plate
Piece forms the 6th light beam advanced along second light path, and the 6th light beam is circularly polarized light.
As optional technical solution, the 6th light beam is incident to first echo area and from the first echo area reflection
At the 7th light beam along the third paths, the 7th light beam is circularly polarized light, and the 7th light beam is from the quarter-wave
The second surface of piece forms the 4th light beam across the quarter-wave plate.
As optional technical solution, which has a first wave length, polarization spectroscope reflection have this first
The first molded line polarised light of wavelength, the second type linearly polarized light of polarization spectroscope transmission with the first wave length, this
One molded line polarised light is S-polarization light, which is P polarization light.
As optional technical solution, which includes multiple laser diodes, multiple laser diodes send out this first
Light beam, first light beam filter other light to form second light beam through the polarization spectroscope, and polarization type Multiplexing apparatus is also set
It is equipped with light absorbing device, the light absorbing device is for absorbing other light.
As optional technical solution, which is laser light source, and the laser light source is for sending out first molded line polarization
Light or the second type linearly polarized light.
As optional technical solution, which is the small wave plate of angle of light interdependence.
In addition, the present invention also proposes a kind of laser projection, it includes above-mentioned polarization type Multiplexing apparatus.
The present invention polarization type Multiplexing apparatus and laser projection, by quarter-wave plate be set to the first lens group with
Between fluorescent wheel so that it is linearly polarized light beam to pass through the laser beam of the first lens group at least one light path, reduces first
Influence of the birefringent phenomenon of lens group to the conversion of laser beam (especially circularly polarized light), improves light transfer efficiency,
Reduce light ray energy loss.
Below in conjunction with the drawings and specific embodiments, the present invention will be described in detail, but not as a limitation of the invention.
Description of the drawings
Fig. 1 is the structural schematic diagram of the first embodiment of the polarization type Multiplexing apparatus of the present invention；
Fig. 2 be the present invention polarization type Multiplexing apparatus in fluorescent wheel floor map；
Fig. 3 is the structural schematic diagram of the second embodiment of the polarization type Multiplexing apparatus of the present invention.
Specific implementation mode
The explanation of following embodiment is to refer to additional schema, to illustrate the particular implementation that the present invention can be used to implement
Example.The direction term that the present invention is previously mentioned, such as "upper", "lower", "front", "rear", "left", "right", " side " etc. are only references
The direction of annexed drawings.Therefore, the direction term used is to illustrate and understand the present invention, rather than to limit the present invention.
In the examples below, in various figures, same section is to be given the same reference numerals.
Please refer to Fig.1 and Fig. 2, Fig. 1 be the present invention polarization type Multiplexing apparatus 100 first embodiment structural representation
Figure；The floor map of fluorescent wheel 5 in the polarization type Multiplexing apparatus of Fig. 2 present invention.The present invention relates to a kind of laser projections, should
Laser projection has polarization type Multiplexing apparatus.The polarization type Multiplexing apparatus 100 of the present invention includes to be set in turn in the first light path
It is light source 1 on L1 and polarization spectroscope 2, the first lens group 3 being set in turn on the second light path L2, quarter-wave plate 4, glimmering
Halo 5 has first with motor 6 and the first collector lens 7 and light pipe 8 that are set in turn on the 6th light path L6, fluorescent wheel 5
Echo area 501 (see Fig. 2).
As shown in Figure 1, in the present embodiment, the first light path L1 intersects with the second light path L2, and the 6th light path L6 is located at the second light
On the reverse extending line of road L2.First light path L1, the second light path L2 and the 6th light path L6 have intersecting area, it is preferred that polarization
The central point of spectroscope 2 is located at above-mentioned intersecting area.First lens group 3 is between polarization spectroscope 2 and fluorescent wheel 5, and first
Collector lens 7 is set between polarization spectroscope 2 and light pipe 8.It should be noted that in Fig. 1, for the ease of embodying the biography of light beam
Path is broadcast, has certain distance between quarter-wave plate 4 and the first lens group 3.In practical operation, quarter-wave plate 4 abuts
First lens group 3 is arranged, and can so reduce the usable floor area of quarter-wave plate 4, and may make polarization type Multiplexing apparatus 100
Structure it is compacter, volume smaller.
In in use, light source 1 sends out the first light beam S1, the first light beam S1 for being propagated along the first light path L1 from polarization spectro
Mirror 2 forms the second the light beam S2, the second light beam S2 propagated along the second light path L2 and is formed from after the convergence of the first lens group 3 after reflecting
The third light beam S3 propagated along the second light path L2.Wherein, the first light beam S1 is the light beam with first wave length, the second light beam S2
It is the first molded line polarised light with first wave length with third light beam S3.In the present embodiment, the first molded line polarised light is, for example, S
Polarised light.
In the present embodiment, quarter-wave plate 4 has opposite first surface 41 and second surface 42.Third light beam S3 is certainly
The first surface 41 of quarter-wave plate 4 forms the 6th light beam S6 after passing through quarter-wave plate 4, and the 6th light beam S6 is incident to glimmering
Halo 5 forms the 7th light beam S7 propagated along third light path L3, the 7th light after the reflection of the first echo area 501 of fluorescent wheel 5
Beam S7 forms the 4th light beam S4, the 4th edges light beam S4 after passing through quarter-wave plate 4 from the second surface 42 of quarter-wave plate 4
It third light path L3 and forms the 5th light beam S5 after the first lens group 3, the 5th light beam S5 is formed from after the transmission of polarization spectroscope 2
Along the 8th light beam S8 that the 6th light path L6 is propagated, the 8th light beam S8 light pipe 8 is converged in first collector lens 7.Wherein, third
Light path L3 with the path overlap of the second light path L2 and direction on the contrary, the 6th light path L6 is identical as the direction of third light path L3, the 6th
Light path L6 is located on the extended line of third light path L3, i.e. the 6th light path L6 is located on the reverse extending line of the second light path L2.6th
Light beam S6 and the 7th light beam S7 is circularly polarized light, and the 4th light beam S4, the 5th light beam S5 and the 8th light beam S8 are the second molded line
Polarised light.In the present embodiment, second type linearly polarized light is, for example, P polarization light.
In the present invention, quarter-wave plate 4 can change the polarization state of third light beam S3 and the 7th light beam S7, the first molded line
Polarised light is incident to after quarter-wave plate 4 from the first surface 41 of quarter-wave plate 4 along the second light path L2 and is converted into
Circularly polarized light (the 6th light beam S6), circularly polarized light are still circularly polarized light the (the 7th after the reflection of the first echo area 501 of fluorescent wheel 5
Light beam S7), which is incident to quarter-wave plate 4 along third light path L3 from the second surface 42 of quarter-wave plate 4
It is converted into second type linearly polarized light later.
Specifically, the first light beam S1 that light source 1 is sent out forms the second light beam S2 from after the reflection of polarization spectroscope 2, in this mistake
Cheng Zhong, via the reflection (or reflection plus filtering) of polarization spectroscope 2, the second light beam S2 is the first molded line with first wave length
Polarised light, then the second light beam S2 be incident to the first lens group 3.That is, on the second light path L2, it is incident to the first lens group 3
Light is linearly polarized light.
In on the second light path L2, the second light beam S2 is after the first lens group 3 from the first surface 41 of quarter-wave plate 4
It is incident to quarter-wave plate 4, and is projected from the second surface of quarter-wave plate 4 42, the 6th light beam S6 of injection is that circle is inclined
Shake light, and then, circularly polarized light is irradiated on the first echo area 501 on fluorescent wheel 5, is reflected thereon and along third light
Road L3 advances, but the variation of polarization state does not occur for light beam, therefore the 7th light beam S7 that autofluorescence wheel 5 is reflected back still is circularly polarized light,
7th light beam S7 along third light path L3 is incident to quarter-wave plate 4 from the second surface 42 of quarter-wave plate 4 and from four point
One of wave plate first surface 41 project after, polarization state is changed so that from quarter-wave plate 4 project the 4th light
Beam S4 becomes second type linearly polarized light, and then the 4th light beam S4 is incident to the first lens group along third light path.That is, in third light
On the L3 of road, the light for being incident to the first lens group 3 is also linearly polarized light.
In the present embodiment, the light beam on light beam and third light path L3 on the second light path L2 can pass through the first lens group 3, and
It is the first molded line polarised light in being incident to the second light beam S2 of the first lens group 3 on the second light path L2, enters on third light path L3
The 4th light beam S4 for being incident upon the first lens group 3 is second type linearly polarized light, so that it is guaranteed that being at least incident to first along a light path
The light beam of lens group 3 is linearly polarized light (such as the then edge when the 6th light beam S6 is irradiated in the first echo area 501 of fluorescent wheel 5
It is linearly polarized light that two light paths of second light path L2 and third light path L3, which are incident to the light beam of the first lens group 3), so,
The influence of birefringent phenomenon pair the second light beam S2 and the 4th light beam S4 of the first lens group 3 can be reduced, i.e. the second light beam S2 is worn
The light energy losses crossed when the first lens group 3 forms third light beam S3 are smaller, and the 4th light beam S4 passes through the first lens group 3 to form the
Light energy losses when five light beam S5 are smaller, to improve the transfer efficiency that the first light beam S1 is converted to the 5th light beam S5, drop
Low light energy losses.Further, since quarter-wave plate 4 is set between the first lens group 3 and fluorescent wheel 5, can also make
The area for obtaining quarter-wave plate 4 reduces, to reduce the cost of polarization type Multiplexing apparatus and laser projection.
If quarter-wave plate 4 is set between polarization spectroscope 2 and the first lens group 3 and (exchanges a quarter
The position of wave plate 4 and the first lens group 3), then after the second light beam S2 (for the first molded line polarised light) passes through quarter-wave plate 4
Circularly polarized light can be formed, the circularly polarized light passes through the first lens group 3 along the second light path L2, reaches fluorescent wheel 5 and from thereon
The first echo area 501 reflection, polarization state does not change in the process, therefore marches to the first lens group along third light path L3
It is still circularly polarized light when 3, can so causes the light beam for being incident to the first lens group 3 along the second light path L2 and third light path L3 to be
Circularly polarized light, and the birefringent phenomenon of the first lens group 3 can substantially reduce the energy of circularly polarized light, therefore turning for light beam can be reduced
Efficiency is changed, light energy losses are larger.
Referring to FIG. 2, fluorescent wheel 5 also has the first phosphor region 502 and the second phosphor region 503, have in the first phosphor region 502
There are the first fluorescent powder, the first phosphor region 502 that can also be equipped with the first reflecting layer, the first fluorescent powder may be disposed on the first reflecting layer,
There is the second fluorescent powder, the second phosphor region 503 can also be equipped with the second reflecting layer, the second fluorescent powder can be set in second phosphor region 503
It is placed on the second reflecting layer.Since motor 6 is connect with fluorescent wheel 5 and fluorescent wheel 5 can be driven to rotate so that the 6th light beam S6 is successively
It is radiated at the first echo area 501, the first phosphor region 502 and the second phosphor region 503 of fluorescent wheel 5.In practical operation, the first reflection
Area 501 can be equipped with third reflecting layer, and the first reflecting layer, the second reflecting layer and third reflecting layer can same layer settings.
When the 6th light beam S6 is incident to the first echo area 501, the 6th light beam S6 directly occurs instead in the first echo area 501
It penetrates and forms the above-mentioned 7th light beam S7 to advance along third light path L3, the 7th light beam S7 is as the 6th light beam S6 at this time, for tool
There is the circularly polarized light of first wave length；When the 6th light beam S6 is incident to the first phosphor region 502, the first fluorescent powder is in the 6th light beam S6
Irradiation under excited and generated the 7th light beam S7 with second wave length, the 7th light beam S7 is anti-in occurring on the first reflecting layer
It advances towards quarter-wave plate 4 along third light path L3 after penetrating, second wave length is more than first wave length；When the 6th light beam S6 is incident to
When the second phosphor region 503, the second fluorescent powder excited under the irradiation of the 6th light beam S6 and generate with third wavelength
Seven light beam S7, the 7th light beam S7 advance along third light path L3 towards quarter-wave plate 4 after being reflected on the second reflecting layer,
Third wavelength is more than second wave length.In the present embodiment, the ranging from 450nm-480nm of first wave length, second wave length is ranging from
510nm-550nm, the ranging from 640nm-770nm of third wavelength, that is, the light beam of first wave length is blue light beam, second wave length
Light beam be green beam, the light beam of third wavelength is red beam.
In the present embodiment, the first echo area 501, the first phosphor region 502 and the second phosphor region 503 of fluorescent wheel 5 these three
Area is grouped together into a circle, and three areas are fan section, and the sum of the central angle in three areas is 360 °, in cycle time
Interior, the time that the 6th light beam S6 is radiated at three areas is proportional to the center angle in three fan sections, and in the present embodiment, three areas will
Fluorescent wheel 5 is divided into trisection, and the size in the areas Ji Sange is identical, and the time ratio that the 6th light beam S6 is radiated at three areas is 1:1:1,
The light beam total amount of blue light beam, red beam and green beam is more balanced.In practical application, three areas can also be by fluorescence
5 points of sections that do not waited for three of wheel, thus, which the light beam total amount of blue light beam, red beam and green beam can partially
It leans on, user can adjust the size in three fan sections according to actual demand.
Polarization spectroscope 2 in the first embodiment of the present invention has inclined to the P that wavelength is 450nm-480nm (blue light)
Light transmission of shaking and to wavelength be 450nm-480nm (blue light) S-polarization light reflection characteristic.In addition, polarization spectroscope 2 is to wave
The long light for being sufficiently more than blue light can also be transmitted, such as wavelength is more than or equal to the light of 500nm.In the present embodiment, the
One molded line polarised light is S-polarization light, and second type linearly polarized light is P polarization light.
In the present embodiment, light source 1, polarization spectroscope 2 and the first lens group 3 have the first relative position relation, light
The wavelength for the first light beam S1 that source 1 is sent out is 450nm-480nm (blue light), after reaching polarization spectroscope 2, polarization spectroscope
2 couple of first light beam S1 is reflected (or reflection plus transmission, that is, be filtered), it is assumed that the first light beam S1 is general light beam, then makes
The first molded line polarised light (S-polarization light) in the first light beam S1 is obtained from after 2 surface reflection of polarization spectroscope along the second light path L2 rows
The first lens group 3 is proceeded to, and other light in the first light beam S1, such as second type linearly polarized light (P polarization light) but polarize certainly
2 surface transmission of spectroscope is simultaneously transmitted along the extended line of the first light path L1.It can be in the travelling route of other light in practical operation
Upper setting light absorbing device is by other light absorptions, to avoid other light from being interfered caused by other light paths.Practical operation
In, light source 1 can be laser light source, and the first light beam S1 that laser light source is sent out only includes the first molded line polarised light (S-polarization light), this
Sample one, after the first light beam S1 reaches polarization spectroscope 2, polarization spectroscope 2 only reflects the first light beam S1.In other realities
It applies in example, the first molded line polarised light can be P polarization light, and second type linearly polarized light can be S-polarization light.
Then, the second light beam S2 (the first molded line polarised light is S-polarization light in the present embodiment) passes through the first lens group 3, edge
The second light path L2, is injected in quarter-wave plate 4 from the first surface 41 of quarter-wave plate 4 and from quarter-wave plate 4
Second surface 42 project the 6th light beam S6, at this time the 6th light beam S6 be circularly polarized light.In above process, along the second light path
On L2, across the light not instead of circularly polarized light of the first lens group 3, linearly polarized light, to improve the light during this
Line transfer efficiency, reduces energy loss.
Then, the 6th light beam S6 is projected on fluorescent wheel 5.
Wherein, when the 6th light beam S6 is irradiated in the first echo area 501 of fluorescent wheel 5, autofluorescence wheel 5 is reflected back the 7th light
Beam S7, the 7th light beam S7 is the still circularly polarized light with first wave length at this time, the 7th light beam S7 along third light path L3 from four/
The second surface 42 of one wave plate 4 is injected in quarter-wave plate 4 and projects the 4th light from the first surface of quarter-wave plate 4 41
Beam S4, the 4th light beam S4 are the second type linearly polarized light (being P polarization light in the present embodiment) with first wave length.4th light beam S4
The 5th light beam S5 is formed after the first lens group 3, and the 5th light beam S5 is still the second type linearly polarized light with first wave length,
Therefore the 5th light beam S5 may pass through polarization spectroscope 2 and reach first collector lens 7.In this course, along third light path L3
On, the light across the first lens group 3 is linearly polarized light, to improve the light transfer efficiency during this, is reduced
Energy loss.
Wherein, when the 6th light beam S6 is irradiated in the first phosphor region 502 of fluorescent wheel 5, autofluorescence wheel 5 is reflected back the 7th light
Beam S7, the 7th light beam S7 is the non-polarized light with second wave length, second wave length 510nm-550nm at this time.7th light beam S7
It is injected in quarter-wave plate 4 from the second surface 42 of quarter-wave plate 4 along third light path L3 and from quarter-wave plate 4
First surface projects the 4th light beam S4, and in the process, the polarization state of light beam does not change, i.e. the 4th light beam S4 is with the
The non-polarized light of two wavelength.4th light beam S4 pools the 5th parallel light beam S5, the 5th light beam S5 after passing through the first lens group 3
Still it is the non-polarized light with second wave length.According to polarization spectroscope 2 used in the present embodiment, transmissive wavelength is more than etc.
In the light of 500nm, so when the 5th light beam S5 may pass through polarization spectroscope 2 and reach first collector lens 7.
Wherein, when the 6th light beam S6 is irradiated in the second phosphor region 503 of fluorescent wheel 5, autofluorescence wheel 5 is reflected back the 7th light
Beam S7, the 7th light beam S7 is the non-polarized light with third wavelength at this time, and third wavelength is 640nm-770nm.7th light beam S7
It is injected in quarter-wave plate 4 from the second surface 42 of quarter-wave plate 4 along third light path L3 and from quarter-wave plate 4
First surface projects the 4th light beam S4, and in the process, the polarization state of light beam does not change, i.e. the 4th light beam S4 is with the
The non-polarized light of three wavelength.4th light beam S4 pools the 5th parallel light beam S5, the 5th light beam S5 after passing through the first lens group 3
Still it is the non-polarized light with third wavelength.According to polarization spectroscope 2 used in the present embodiment, transmissive wavelength is more than etc.
In the light of 500nm, so when the 5th light beam S5 may pass through polarization spectroscope 2 and reach first collector lens 7.
In addition, the incident angle-dependent of the quarter-wave plate 4 used in the present invention is small, i.e. the incidence angle of light is difficult to cause
The reflectivity changes of light.When the third light beam S3 along the second light path L2 is incident to from the first surface 41 of quarter-wave plate 4
When incidence angle when quarter-wave plate 4 is less than or equal to 30 °, third light beam S3 passes through reflectivity base when quarter-wave plate 4
This is constant.When the 7th light beam S7 along third light path L3 is incident to a quarter from the second surface 42 of quarter-wave plate 4
When incidence angle when wave plate 4 is less than or equal to 30 °, reflectivity when the 7th light beam S7 quarter-wave plates 4 is basically unchanged.Using this
Kind of quarter-wave plate 4, can improve that third light beam S3 is converted to the 6th light beam S6 and the 7th light beam S7 is converted to the 4th light beam
The transfer efficiency of S4, i.e. third light beam S3 and the 7th light beam S7 during across quarter-wave plate 4, energy loss compared with
It is small, and the light energy of the 6th light beam S6 and the 4th light beam S4 is more stable, it will not be because of third light beam S3's and the 7th light beam S7
Incidence angle has deviation slightly and generates larger fluctuation.
In practical operation, light source 1 of the invention may include multiple laser diodes to send out the first light beam S1.Polarization type closes
Electro-optical device 101 also may include that the third lens group 9, the third lens group 9 are set between light source 1 and polarization spectroscope 2, i.e., third is saturating
Microscope group 9 is set on the first light path L1.In practical operation, the first lens group 3, the second lens 104 and the third lens group 9 can be used
Non-spherical lens can also be used in spherical lens.The light that above-mentioned multiple laser diodes are sent out becomes after the third lens group 9
The light beam of collimation simultaneously exposes on polarization spectroscope 2.
Referring to FIG. 3, Fig. 3 is the structural schematic diagram of 101 second embodiment of polarization type Multiplexing apparatus of the present invention, second is real
Apply polarization type Multiplexing apparatus 101 in example and the polarization type Multiplexing apparatus 100 in first embodiment difference lies in：Second implements
There is second of relative position relation, polarization spectroscope 2 ' to have for light source 1, polarization spectroscope 2 ' and the first lens group 3 in example
Reflection is carried out to the P polarization light that wavelength is 450nm-480nm (blue light) and to S that wavelength is 450nm-480nm (blue light)
The characteristic that polarised light is transmitted.In addition, the transmissivity that polarization spectroscope 2 ' is sufficiently more than wavelength the light of blue light is close
It is 0.In the present embodiment, the first molded line polarised light is S-polarization light, and second type linearly polarized light is P polarization light.Light source 1 send out
The wavelength of one light beam S1 be 450nm-480nm (blue light), after reaching polarization spectroscope 2 ', it is assumed that the first light beam S1 be with
General light beam, polarization spectroscope 2 ' transmit (or transmissive plus reflective, that is, be filtered) the first light beam S1 so that the first light
The first molded line polarised light (S-polarization light) in beam S1 marches to the first lens from after the transmission of polarization spectroscope 2 ' along the second light path L2
Group 3, and other light in the first light beam S1, such as second type linearly polarized light (P polarization light) is but from the table of polarization spectroscope 2 '
Face is reflected and is transmitted along the reverse extending line of the 6th light path L6.In practical operation, it can be set in the travelling route of other light
Light absorbing device is set by other light absorptions, other light to be avoided to be interfered caused by other light paths.In practical operation, light
Source 1 can be laser light source, the first light beam S1 that laser light source is sent out only include the first molded line polarised light (S-polarization light), such one
Come, after the first light beam S1 reaches polarization spectroscope 2, polarization spectroscope 2 only transmits the first light beam S1.In other embodiment
In, the first molded line polarised light can be P polarization light, and second type linearly polarized light can be S-polarization light.
Then, the second light beam S2 (the first molded line polarised light is S-polarization light in the present embodiment) passes through the first lens group 3, edge
The second light path L2, is injected in quarter-wave plate 4 from the first surface 41 of quarter-wave plate 4 and from quarter-wave plate 4
Second surface 42 project the 6th light beam S6, at this time the 6th light beam S6 be circularly polarized light.In above process, along the second light path
On L2, across the light not instead of circularly polarized light of the first lens group 3, linearly polarized light, to improve the light during this
Line transfer efficiency, reduces energy loss.
Then, the 6th light beam S6 is projected on fluorescent wheel 5.
Wherein, when the 6th light beam S6 is irradiated in the first echo area 501 of fluorescent wheel 5, autofluorescence wheel 5 is reflected back the 7th light
Beam S7, the 7th light beam S7 is the still circularly polarized light with first wave length at this time, the 7th light beam S7 along third light path L3 from four/
The second surface 42 of one wave plate 4 is injected in quarter-wave plate 4 and projects the 4th light from the first surface of quarter-wave plate 4 41
Beam S4, the 4th light beam S4 are the second type linearly polarized light (being P polarization light in the present embodiment) with first wave length.4th light beam S4
The 5th light beam S5 is formed after the first lens group 3, and the 5th light beam S5 is still the second type linearly polarized light with first wave length,
Therefore the 5th light beam S5 can reach first collector lens 7 from 2 ' surface reflection of polarization spectroscope.In this course, along third
On light path L3, the light across the first lens group 3 is linearly polarized light, to improve the light transfer efficiency during this,
Reduce energy loss.
Wherein, when the 6th light beam S6 is irradiated in the first phosphor region 502 of fluorescent wheel 5, autofluorescence wheel 5 is reflected back the 7th light
Beam S7, the 7th light beam S7 is the non-polarized light with second wave length, second wave length 510nm-550nm at this time.7th light beam S7
It is injected in quarter-wave plate 4 from the second surface 42 of quarter-wave plate 4 along third light path L3 and from quarter-wave plate 4
First surface projects the 4th light beam S4, and in the process, the polarization state of light beam does not change, i.e. the 4th light beam S4 is with the
The non-polarized light of two wavelength.4th light beam S4 pools the 5th parallel light beam S5, the 5th light beam S5 after passing through the first lens group 3
Still it is the non-polarized light with second wave length.According to polarization spectroscope 2 used in the present embodiment, wavelength is more than or equal to
The transmissivity of the light of 500nm is almost 0, so when the 5th light beam S5 the can be reached from the surface reflection of polarization spectroscope 2 '
One collector lens 7.
Wherein, when the 6th light beam S6 is irradiated in the second phosphor region 503 of fluorescent wheel 5, autofluorescence wheel 5 is reflected back the 7th light
Beam S7, the 7th light beam S7 is the non-polarized light with third wavelength at this time, and third wavelength is 640nm-770nm.7th light beam S7
It is injected in quarter-wave plate 4 from the second surface 42 of quarter-wave plate 4 along third light path L3 and from quarter-wave plate 4
First surface 41 project the 4th light beam S4, in the process, the polarization state of light beam does not change, i.e. the 4th light beam S4 be with
The non-polarized light of third wavelength.4th light beam S4 pools the 5th parallel light beam S5, the 5th light beam after passing through the first lens group 3
S5 is still the non-polarized light with third wavelength.According to polarization spectroscope 2 used in the present embodiment, wavelength is more than or equal to
The transmissivity of the light of 500nm is almost 0, so when the 5th light beam S5 the can be reached from the surface reflection of polarization spectroscope 2 '
One collector lens 7.
The polarization type Multiplexing apparatus and laser projection of the present invention by quarter-wave plate 4 be set to the first lens group 3 with
Between fluorescent wheel 5 so that the second light beam S2 at least across the first lens group 3 is linearly polarized light, when light is incident to fluorescent wheel 5
The first echo area when, then the light beam for passing twice through the first lens is linearly polarized light, to reduce the double of the first lens group 3
Influence of the refraction effect to the light energy of the light (such as third light beam S3 and the 4th light beam S4) across it, i.e. the second light beam S2
Light energy losses when forming third light beam S3 across the first lens group 3 are smaller, and the 4th light beam S4 is across the formation of the first lens group 3
Light energy losses when the 5th light beam S5 are smaller, to improve the transfer efficiency that the first light beam S1 is converted to the 5th light beam S5,
Reduce light energy losses.
By the above detailed description of preferred embodiments, it is intended to more clearly describe the feature of the present invention and spirit,
And not protection scope of the present invention is limited with above-mentioned disclosed preferred embodiment.On the contrary, its purpose
It is intended to cover various changes and has being arranged in the scope of the claims of the invention to be applied of equality.Cause
This, scope of the claims of the invention should illustrate the most wide explanation of work according to above-mentioned, to cause it to cover institute
Possible change and the arrangement of tool equality.
Claims (10)
1. a kind of polarization type Multiplexing apparatus, it is characterised in that include：
Light source, for sending out the first light beam along the first paths；
Polarization spectroscope is set in first light path, which reflects from the polarization spectroscope or transmit to form edge
The second light beam of the second paths, which is the first molded line polarised light；
First lens group is set in second light path, which passes through first lens group with shape along second light path
At third light beam；
Fluorescent wheel is set in second light path；And
Quarter-wave plate is set between first lens group and the fluorescent wheel, which passes through the quarter-wave
Piece is incident to the fluorescent wheel and advances from after fluorescent wheel reflection along third light path and pass through the quarter-wave plate to be formed
4th light beam, the 4th light beam pass through first lens group along the third light path.
2. polarization type Multiplexing apparatus as described in claim 1, which is characterized in that the path of the third light path and second light path
It is overlapped and direction is opposite.
3. polarization type Multiplexing apparatus as described in claim 1, which is characterized in that the fluorescent wheel has the first echo area, this
Edge after three light beams pass through the quarter-wave plate to be incident to first echo area of the fluorescent wheel and reflected from first echo area
It third light path traveling and then passes through the quarter-wave plate to form the 4th light beam, the 4th light beam is that the second molded line is inclined
Shake light, and the first molded line polarised light is different from the second type linearly polarized light.
4. polarization type Multiplexing apparatus as claimed in claim 3, which is characterized in that the quarter-wave plate has opposite first
Surface and second surface, the third light beam are the first molded line polarised light, the third light beam from the quarter-wave plate this
One surface passes through the quarter-wave plate to form the 6th light beam advanced along second light path, and the 6th light beam is circular polarization
Light.
5. polarization type Multiplexing apparatus as claimed in claim 4, which is characterized in that the 6th light beam is incident to first echo area
And the 7th light beam along the third paths is reflected to form from first echo area, the 7th light beam is circularly polarized light, should
7th light beam forms the 4th light beam from the second surface of the quarter-wave plate across the quarter-wave plate.
6. polarization type Multiplexing apparatus as described in claim 1, which is characterized in that first light beam has first wave length, this is partially
The the first molded line polarised light of the spectroscope that shakes reflection with the first wave length, polarization spectroscope transmission have the first wave length
The second type linearly polarized light, the first molded line polarised light are S-polarization light, which is P polarization light.
7. polarization type Multiplexing apparatus as described in claim 1, which is characterized in that the light source includes multiple laser diodes, more
A laser diode sends out first light beam, which filters other light to form second light through the polarization spectroscope
Beam, polarization type Multiplexing apparatus are additionally provided with light absorbing device, and the light absorbing device is for absorbing other light.
8. polarization type Multiplexing apparatus as claimed in claim 3, which is characterized in that the light source is laser light source, the laser light source
For sending out the first molded line polarised light or the second type linearly polarized light.
9. polarization type Multiplexing apparatus as described in claim 1, which is characterized in that the quarter-wave plate is that angle of light is interdependent
The small wave plate of property.
10. a kind of laser projection, which is characterized in that it includes the polarization type closing light dresses as described in claim 1 to 9 is any
It sets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810824090.4A CN108803222A (en) | 2018-07-25 | 2018-07-25 | Polarization type Multiplexing apparatus and laser projection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810824090.4A CN108803222A (en) | 2018-07-25 | 2018-07-25 | Polarization type Multiplexing apparatus and laser projection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108803222A true CN108803222A (en) | 2018-11-13 |
Family
ID=64078131
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810824090.4A Withdrawn CN108803222A (en) | 2018-07-25 | 2018-07-25 | Polarization type Multiplexing apparatus and laser projection |
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| CN (1) | CN108803222A (en) |
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| CN109613703A (en) * | 2018-12-17 | 2019-04-12 | 重庆爱奇艺智能科技有限公司 | A display device based on a folded optical path |
| WO2020110464A1 (en) * | 2018-11-29 | 2020-06-04 | Ricoh Company, Ltd. | Light source optical system, light source device, and image projection apparatus |
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| CN203337988U (en) * | 2013-06-18 | 2013-12-11 | 深圳大学 | A laser projection light source |
| CN105122133A (en) * | 2013-06-04 | 2015-12-02 | Nec显示器解决方案株式会社 | Illumination optical system and projector |
| CN106164770A (en) * | 2014-03-31 | 2016-11-23 | Nec显示器解决方案株式会社 | Light source and projector |
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| JP2001027741A (en) * | 1999-07-14 | 2001-01-30 | Canon Inc | Image display device |
| CN103430093A (en) * | 2011-03-18 | 2013-12-04 | Nec显示器解决方案株式会社 | Phosphor-equipped illumination optical system and projector |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2020110464A1 (en) * | 2018-11-29 | 2020-06-04 | Ricoh Company, Ltd. | Light source optical system, light source device, and image projection apparatus |
| JP2020086261A (en) * | 2018-11-29 | 2020-06-04 | 株式会社リコー | Light source optical system, light source device and image projection |
| JP7031567B2 (en) | 2018-11-29 | 2022-03-08 | 株式会社リコー | Light source optical system, light source device and image projection device |
| JP2022084619A (en) * | 2018-11-29 | 2022-06-07 | 株式会社リコー | Light source optical system, light source device and image projection device |
| US11640106B2 (en) | 2018-11-29 | 2023-05-02 | Ricoh Company, Ltd. | Light source optical system, light source device, and image projection apparatus |
| CN109613703A (en) * | 2018-12-17 | 2019-04-12 | 重庆爱奇艺智能科技有限公司 | A display device based on a folded optical path |
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