CN1344953A - Light homogenizer - Google Patents
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- CN1344953A CN1344953A CN 00128800 CN00128800A CN1344953A CN 1344953 A CN1344953 A CN 1344953A CN 00128800 CN00128800 CN 00128800 CN 00128800 A CN00128800 A CN 00128800A CN 1344953 A CN1344953 A CN 1344953A
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Abstract
The light homogenizer is used to homogenize the brightness of the light beam produced by some light sources. In the light superimposing device, the first superimposing lens is one convex lens and is set behind the beam spliter device to receive the several quasi-parallel light beams from the beam spliter device; and the second superimposing lens is one concave lens and set parallelly behind the first lens and inside the focus length of the first one to receive the several light beams from the first lens. The optical axes of the two lenses are superposed to form one central axis. The said light homogenized results in short light path, small light beam size, parallel light beams and raised integral optical machine performance.
Description
The present invention relates to a kind of light homogenizer.
See also Fig. 1.Fig. 1 is the synoptic diagram of existing light homogenizer 10.Light homogenizer 10 is applied to projection arrangement, is used for that the light beam L that light source 11 produces is made brightness uniformity and handles, for the usefulness of projection.Existing light homogenizer 10 comprises: beam splitting arrangement 12 is used for converting the light beam L that light source 11 transmits to many approximately parallel light beam l; Light polyunit 14 is used for many light beam l superimposed to form than the more uniform superimposed light beam L* of light source 11 elementary beam that sent.
As shown in Figure 1, beam splitting arrangement 12 comprises a plurality of first beam splitting lens 16, and a plurality of second beam splitting lens 18.A plurality of second beam splitting lens 18 are corresponding with a plurality of first beam splitting lens 16.A plurality of first beam splitting lens 16 are plano-convex lens, are used for receiving the light beam L from light source 11, and to many light beam l of converting.A plurality of second beam splitting lens 18 are plano-convex lens also, and are positioned at outside the focal length of a plurality of first beam splitting lens 16, are used for receiving many light beam l, and it is reached light polyunit 14.
Generally speaking, the brightness of the light beam L that light source 11 sends and inhomogeneous is so the brightness of many light beam l that told by light beam L is also inequality.But owing to superimposed light beam L* is formed by stacking by many light beam l, so the brightness of the comparable elementary beam L of superimposed light beam L* is average, so to reach the purpose of light uniformization.
Usually when the projection arrangement of small design, can wish simultaneously that light path is short, beam sizes W is little and parallel beam, to improve the performance of whole ray machine.The light path weak point can make the projection arrangement miniaturization; Beam sizes W I makes employed thereafter various optical elements, is dwindled as the volume of lens, dichronic mirror, polarization beam apparatus etc., dwindling whole ray machine volume, and reduces cost.In addition, because general dichronic mirror, penetration LCD panel and reflection type liquid crystal display all have the restriction of ranges of incidence angles, so if each light beam of incident simultaneously then can not too be subjected to the restriction of penetration or reflection type liquid crystal display ranges of incidence angles near parallel.
See also Fig. 2.Fig. 2 is the light path synoptic diagram that a Fig. 1 light homogenizer 10 and a dichronic mirror 24 are used." being example; as previously mentioned; if light beam l ' and light beam l " fails near parallel now with a formed light beam l ' of light beam L and a light beam l, then light beam l ' " be incident to incident angle θ ', the θ of dichronic mirror 24 " with light beam l will be different, again because the incident angle of dichronic mirror 24 has certain scope restriction, if so the difference of " incident angle θ ', θ " is excessive light beam l ' and light beam l, just can't satisfy the restriction of this ranges of incidence angles simultaneously.Usually if desire solves this problem, just must use expensive element (as the dichronic mirror of layer plated film gradually), to satisfy different incident angles simultaneously.
Yet, for existing light homogenizer 10, require simultaneously that light path is short, beam sizes is little and light beam near parallel, reality is had any problem in the design.Part with regard to beam splitting arrangement 12, as shown in Figure 1, the second beam splitting lens 18 must be located at after the focal length of the first beam splitting lens 16 usually, so that can penetrate with the state of dispersing a little from the light beam of the second beam splitting lens, 18 ejaculations, so the light path between the second beam splitting lens 18 and the first beam splitting lens 16 just at least can not be shorter than the focal length of the first beam splitting lens 16.And with regard to the part of light polyunit 14, if want beam sizes W little, then the curvature of the second superimposed lens 22 will be big, but can cause light beam towards middle bunching so again, make light beam not really parallel.Light path is short, beam sizes is little and the approaching parallel design requirement of light beam so the structure of existing light homogenizer 10 also can't satisfy.
Therefore, fundamental purpose of the present invention provides a kind of light homogenizer, and this device can be realized shortening light path, reduces beam sizes and make the more approaching parallel design object of light beam.
For realizing purpose of the present invention, a kind of light homogenizer is provided, be used for that the light beam that a light source produces is made brightness uniformity and handle, described light homogenizer comprises: a beam splitting arrangement is used for the Beam Transformation that described light source transmits is become many approximately parallel light beams; And a smooth polyunit, be used for it is characterized in that to form one described smooth polyunit comprises with described many light beams are superimposed than the more uniform superimposed light beam of elementary beam that light source is sent:
The first superimposed lens are convex lens, are located at the rear side of described beam splitting arrangement, are used for receiving many approximately parallel light beams that described beam splitting arrangement transmits;
The second superimposed lens, be concavees lens, be arranged at after the described first superimposed lens abreast and be positioned within the focal length of the described first superimposed lens, be used for receiving many light beams that the described first superimposed lens are transmitted, the optical axis of the wherein said first superimposed lens and the described second superimposed lens overlaps to form a central shaft
Wherein, when many light beams that transmit from described beam splitting arrangement pass through the first superimposed lens of described smooth polyunits, many light beams can be towards the direction deviation of described central shaft, when described many light beams during through the described second superimposed lens, described many light beams can towards with the direction deviation of described central axes, and in many light beams process processes of described first and second superimposed lens that described beam splitting arrangement transmits, described many light beams can be superimposed gradually to form described superimposed light beam.
For realizing purpose of the present invention, a kind of light homogenizer also is provided, being used for that the light beam that a light source is produced is made brightness uniformity handles, described light homogenizer comprises a beam splitting arrangement, be used for the Beam Transformation that described light source transmits is become many approximately parallel light beams, it is characterized in that described beam splitting arrangement comprises:
One first lens combination, it comprises a plurality of first beam splitting lens, described a plurality of first beam splitting lens are a plurality of convex lens, and are arranged in one first plane with the kenel of array, are used for receiving the light beam that described light source transmits; And
One second lens combination, it comprises the corresponding second beam splitting lens of a plurality of and described a plurality of first beam splitting lens, described a plurality of second beam splitting lens are a plurality of concavees lens, and the kenel with array is arranged in one second plane, described second plane system and described first plane parallel, described a plurality of second beam splitting lens are positioned within the focal length of described a plurality of first beam splitting lens;
Wherein, the light beam that transmits when described light source is during through described first lens combination, the light beam that each first beam splitting lens can receive it towards the direction bunching of himself optical axis to form a light beam, and described a plurality of first beam splitting lens can become the Beam Transformation that described light source transmits described many light beams, when described many light beams during through described second lens combination, the light beam that each second beam splitting lens can transmit the corresponding first beam splitting lens is towards the direction deviation away from himself optical axis, and is divergent shape.
For realizing purpose of the present invention, a kind of projection arrangement with a light homogenizer also is provided, described projection arrangement comprises: a light source is used for producing a light beam; A plurality of dichronic mirrors are used for described beam separation is become RGB three monochromic beams; A plurality of catoptrons are used for reflecting described RGB three monochromic beams; A plurality of beam splitters; A plurality of reflection type liquid crystal displays, it includes a half-wavelength deferred mount, is used for modulating described RGB three monochromic beams, makes it to include an image information; Synthetic side's body of the same colour is used for the synthetic a branch of light beam that includes image of the monochromatic described image information of described RGB three beams; And a projection lens group, be used for light beam projecting to a screen that includes image with described.Described light homogenizer comprises: a beam splitting arrangement is used for the Beam Transformation that described light source transmits is become many approximately parallel light beams; And a smooth polyunit, be used for it is characterized in that to form one described smooth polyunit comprises with described many light beams are superimposed than the more uniform superimposed light beam of light beam that primary source is sent:
One first superimposed lens are convex lens, are located at the rear side of described beam splitting arrangement, are used for receiving many approximately parallel light beams that described beam splitting arrangement transmits;
One second superimposed lens, be concavees lens, be arranged at after the described first superimposed lens abreast and be positioned within the focal length of the described first superimposed lens, be used for receiving many light beams that the described first superimposed lens are transmitted, the optical axis of the wherein said first superimposed lens and the described second superimposed lens overlaps to form a central shaft:
Wherein, many light beams that transmit when described beam splitting arrangement are during through the first superimposed lens of described smooth polyunits, described many light beams can be towards the direction deviation of described central shaft, when described many light beams during through the described second superimposed lens, described many light beams can towards with the direction deviation of described central axes, and in many light beams process processes of described first and second superimposed lens that described beam splitting arrangement transmits, described many light beams can be superimposed gradually to form described superimposed light beam.
The invention has the advantages that,, shortened the length of light path, make that simultaneously the light beam of outgoing is substantially parallel owing in light homogenizer of the present invention, adopted concavees lens.Therefore, can satisfy simultaneously easily that light path is short, beam sizes is little and the designing requirement of parallel beam, improve the performance of whole ray machine.
The preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.In the accompanying drawing,
Fig. 1 is the synoptic diagram of existing light homogenizer;
Fig. 2 is the light path synoptic diagram that a Fig. 1 light homogenizer and a dichronic mirror are used;
Fig. 3 is applied to the synoptic diagram of a projection arrangement for light homogenizer of the present invention;
Fig. 4 is the synoptic diagram of light homogenizer of the present invention;
Fig. 5 is the first beam splitting lens of Fig. 4 beam splitting arrangement and the synoptic diagram of second beam splitting lens corresponding with it;
Fig. 6 is the beam splitting arrangement of Fig. 4 light homogenizer and the comparison synoptic diagram that Fig. 1 has the beam splitting arrangement of beam splitting arrangement now;
Fig. 7 is that the light polyunit of Fig. 4 light homogenizer and the light path of the existing light polyunit of Fig. 1 compare synoptic diagram.
See also Fig. 3.Fig. 3 is applied to the synoptic diagram of projection arrangement 42 for light homogenizer 40 of the present invention.Projection arrangement 42 is used for light beam L is modulated into the light beam L ' that contains image, and is projected on the screen 44 to form image frame.Projection arrangement 42 comprises: light source 46 is used for producing light beam L; Three dichronic mirrors 48,49,50 are used for light beam L is separated into red, green, blue three monochromic beam R, G, B; Two catoptrons 51,52 are used for reflecting three monochromic beam R, G, B; Three polarization beam apparatus 53,54,55; Three reflection type liquid crystal displays (include the half-wavelength deferred mount; Halfwave retarder) 56,57,58, be used for modulating three monochromatic light R, G, B, make it to include image information; Synthetic side's body (Colorcube of the same colour; X-cube) 60, the three monochromatic light R, G, the B that are used for including image synthesize the light beam L ' that includes image; And projection lens group 62, the light beam L ' that is used for including image is projected to screen 44, to form image frame.And light homogenizer 40 of the present invention is used for original not light beam L of homogenising is done the brightness uniformity processing, and delivers to dichronic mirror 48,49, makes the brightness of this image frame that is projected to screen 44 more even.
See also Fig. 4.Fig. 4 is the synoptic diagram of light homogenizer 40 of the present invention.Light homogenizer 40 comprises: beam splitting arrangement 66 is used for converting the light beam L that light source 46 transmits to many approximately parallel light beam l; And light polyunit 68, be used for many light beam l superimposed to form the more uniform superimposed light beam L* of elementary beam L that is sent than light source 46.
As shown in Figure 4, the light beam L that transmits when light source 46 is during through first lens combination 70, each first beam splitting lens 74 can be with its light beam that receives towards the direction bunching of himself optical axis 88 forming light beam l, and the light beam L that a plurality of first beam splitting lens 74 can transmit light source 46 converts many light beam l to.As many light beam l during through second lens combination 72, the light beam l that each second beam splitting lens 78 can transmit the corresponding first beam splitting lens 74 is towards the direction deviation away from himself optical axis 90, and is divergent shape.
Many light beam l that transmit when beam splitting arrangement 66 are during through the first superimposed lens 82 of light polyunits 68, many light beam l can be towards the direction deviation of central shaft 86, but still be divergent shape, as many light beam l during through the second superimposed lens 84, many light beam l can be towards the direction deviation parallel with central shaft 86, and each bar light beam l all can disperse and is distributed in whole projection panel.In many light beam l process processes of first and second superimposed lens 82,84 that beam splitting arrangement 66 transmits, many light beam l of each bar can be superimposed, to form than the more uniform superimposed light beam L* of elementary beam L.
See also Fig. 5.Fig. 5 is the first beam splitting lens 74 of Fig. 4 beam splitting arrangement 66 and the synoptic diagram of second beam splitting lens 78 corresponding with it.The optical axis 90 of each second beam splitting lens 78 of beam splitting arrangement 66 is not superimposed with the optical axis 88 of the corresponding first beam splitting lens 74, and the optical axis 90 of the second beam splitting lens 78 is offset a side-play amount d towards the direction away from central shaft 86, so that many light beam l that penetrate from a plurality of second beam splitting lens 78 are able to the direction deviation towards central shaft 86, share the work that is positioned at the first superimposed lens 82 polymerization light beam l behind a plurality of second beam splitting lens 78., only optionally consider side-play amount d herein, can make that side-play amount d is zero, that is the work of not sharing the polymerization light beam l of the first superimposed lens 82.The light shaft offset amount d of each second beam splitting lens 78 is different along with the second beam splitting lens 78 have with the distance of central shaft 86 distances, and the second beam splitting lens 78 are far away more apart from central shaft 86, and light shaft offset amount d is big more; Far away more apart from central shaft 86, d is more little for the light shaft offset amount.
See also Fig. 6.Fig. 6 is the beam splitting arrangement 66 of Fig. 4 beam splitting uniforming device 40 and the comparison synoptic diagram of the beam splitting arrangement 12 of the existing beam splitting arrangement 10 of Fig. 1.Because the first beam splitting lens 16 and the second beam splitting lens 18 of existing beam splitting arrangement 12 are all convex lens, so the second beam splitting lens 18 must be located at after the focal length of the first beam splitting lens 16, so that can penetrate with the angle of divergence of appropriateness from the light beam of the second beam splitting lens, 18 ejaculations, so that can the whole projection panel of effective lighting.But just because of this, make that the distance between the existing first beam splitting lens 16 and the second beam splitting lens 18 can't shorten, cause light path long, the ray machine volume is excessive.Yet beam splitting arrangement 66 for light homogenizer 40 of the present invention, under the light homogenizer 40 employed first beam splitting lens 74 of the present invention situation identical with the first beam splitting lens, 16 focal lengths of existing light homogenizer 10, because the second beam splitting lens 78 of the present invention are concavees lens, before so the second beam splitting lens 78 of the present invention can be located at the focal length of the first beam splitting lens 74, and the light beam that penetrates from the second beam splitting lens 78 is penetrated with the angle of divergence of appropriateness, so can reach the purpose that shortens light path, reduces the ray machine volume.
See also Fig. 7, Fig. 7 is that the light polyunit 68 of Fig. 4 light homogenizer 40 compares synoptic diagram with the light path that Fig. 1 has light polyunit 14 now.Because the first superimposed lens 20 and the second superimposed lens 22 of existing light polyunit 14 are all convex lens, so worker's degree W of superimposed light beam L* can't dwindle.Yet, light polyunit 68 for light homogenizer 40 of the present invention, its first superimposed lens 82 can be the bigger convex lens of a curvature, so that light beam l is rapidly towards central shaft 86 deviations, and because its second superimposed lens 84 are concavees lens, so can make light beam l towards the direction deviation that is parallel to central shaft 86, beam sizes W was dwindled, can reach the requirement that reduces component size, meets the restriction of LCD panel incident angle again simultaneously.In addition, because the first superimposed lens 82 can make light beam l rapidly towards central shaft 86 polymerizations,, reach the effect that shortens light path so also can shorten the distance between the first superimposed lens 82 and the second superimposed lens 84.
It more than is the explanation of itself being done at light homogenizer 40.Projection arrangement 42 also can comprise a polarization converter (Polarization Converter), be arranged between first lens combination 70 and second lens combination 72, or second between lens combination 72 and the first superimposed lens 82, be used for many light beam l are made polarization manipulation, so that these many light beam l have identical polarization direction or polarization state.Light beam can be divided into two owing to some polarization converter again, so when this polarization converter is arranged between first lens combination 70 and second lens combination 72, the number that is incident upon the light beam of second lens combination 72 can double, only must do corresponding adjustment with the number and the position of the second beam splitting lens 78 of second lens combination 72 this moment, can reach purpose of the present invention equally.
Again, above embodiment is that the projection arrangement that shows with reflection type liquid crystal is an example, in fact, light homogenizer of the present invention also can be applicable to the penetration liquid crystal display projection apparatus or the projection arrangement of other kenels, as uses digital micro-mirror device (digital micro-mirror device; DMD) projection arrangement, even general projector etc.So long as be applied to the occasion of light homogenizer, all the present invention can be used so that the light source homogenising.
Than existing light homogenizer 10, light homogenizer 40 of the present invention has the second beam splitting lens 78 and the second superimposed lens 84 of concavees lens form, therefore can change the travel path of light beam l, light path is shortened, beam sizes W diminishes, and make the superimposed energy density of many light beam l more even, and then reach the purpose that increases projection quality, reduced volume, reduces the cost.
The above only is preferred embodiment of the present invention, and all equivalences of making according to claim of the present invention change and revise, and all should fall within the scope of the present invention.
Claims (18)
1. a light homogenizer is used for that the light beam that a light source produces is made brightness uniformity and handles, and described light homogenizer comprises: a beam splitting arrangement is used for the Beam Transformation that described light source transmits is become many approximately parallel light beams; And a smooth polyunit, be used for described many light beams superimposed forming one than the more uniform superimposed light beam of elementary beam that light source is sent,
It is characterized in that described smooth polyunit comprises:
The first superimposed lens are convex lens, are located at the rear side of described beam splitting arrangement, are used for receiving many approximately parallel light beams that described beam splitting arrangement transmits;
The second superimposed lens, be concavees lens, be arranged at after the described first superimposed lens abreast and be positioned within the focal length of the described first superimposed lens, be used for receiving many light beams that the described first superimposed lens are transmitted, the optical axis of the wherein said first superimposed lens and the described second superimposed lens overlaps to form a central shaft
Wherein, when many light beams that transmit from described beam splitting arrangement pass through the first superimposed lens of described smooth polyunits, many light beams can be towards the direction deviation of described central shaft, when described many light beams during through the described second superimposed lens, described many light beams can towards with the direction deviation of described central axes, and in many light beams process processes of described first and second superimposed lens that described beam splitting arrangement transmits, described many light beams can be superimposed gradually to form described superimposed light beam.
2. light homogenizer as claimed in claim 1, it is characterized in that, described beam splitting arrangement comprises one first lens combination, described first lens combination comprises a plurality of first beam splitting lens, described a plurality of first beam splitting lens are arranged in one first plane with the kenel of array, be used for receiving the light beam that described light source transmits, wherein, the Beam Transformation that each first beam splitting lens transmits described light source becomes a light beam, and described a plurality of first beam splitting lens can become the Beam Transformation that described light source transmits described many light beams.
3. light homogenizer as claimed in claim 2, it is characterized in that, described beam splitting arrangement also comprises one second lens combination, between described first lens combination and the described first superimposed lens, described second lens combination comprises the corresponding second beam splitting lens of a plurality of and described a plurality of first beam splitting lens, described a plurality of second beam splitting lens are arranged in one second plane with the kenel of array, and described second plane and described first plane parallel, the described second beam splitting lens are used for receiving the light beam that first beam splitting lens corresponding with it are transmitted.
4. light homogenizer as claimed in claim 3 is characterized in that, described central shaft is perpendicular to described first and second plane and the centre by described first and second lens combination.
5. light homogenizer as claimed in claim 4, it is characterized in that, a plurality of first beam splitting lens of described beam splitting arrangement are a plurality of convex lens, and described a plurality of second beam splitting lens are a plurality of concavees lens, and described a plurality of second beam splitting lens are positioned within the focal length of described a plurality of first beam splitting lens, each first beam splitting lens can be with the light beam of its reception towards the direction of himself optical axis deviation in addition, to form the light beam in described many light beams, light beam that each second beam splitting lens then can transmit the corresponding first beam splitting lens is towards away from the direction of himself optical axis deviation in addition, and is divergent shape.
6. light homogenizer as claimed in claim 5, it is characterized in that, have at least the optical axis of one second beam splitting lens not superimposed in described a plurality of second beam splitting lens with the optical axis of the corresponding first beam splitting lens, and the optical axis of the described second beam splitting lens is towards away from the skew of the direction of described central shaft, so that the light beam that penetrates from the described second beam splitting lens is towards the direction deviation of described central shaft.
7. light homogenizer as claimed in claim 5 is characterized in that, described a plurality of first beam splitting lens are a plurality of plano-convex lenss, and described a plurality of second beam splitting lens are a plurality of plano-concave lenss.
8. a light homogenizer is used for that the light beam that a light source is produced is made brightness uniformity and handles, and described light homogenizer comprises a beam splitting arrangement, be used for the Beam Transformation that described light source transmits is become many approximately parallel light beams,
It is characterized in that described beam splitting arrangement comprises:
One first lens combination, it comprises a plurality of first beam splitting lens, described a plurality of first beam splitting lens are a plurality of convex lens, and are arranged in one first plane with the kenel of array, are used for receiving the light beam that described light source transmits; And
One second lens combination, it comprises the corresponding second beam splitting lens of a plurality of and described a plurality of first beam splitting lens, described a plurality of second beam splitting lens are a plurality of concavees lens, and the kenel with array is arranged in one second plane, described second plane system and described first plane parallel, described a plurality of second beam splitting lens are positioned within the focal length of described a plurality of first beam splitting lens;
Wherein, the light beam that transmits when described light source is during through described first lens combination, the light beam that each first beam splitting lens can receive it towards the direction bunching of himself optical axis to form a light beam, and described a plurality of first beam splitting lens can become the Beam Transformation that described light source transmits described many light beams, when described many light beams during through described second lens combination, the light beam that each second beam splitting lens can transmit the corresponding first beam splitting lens is towards the direction deviation away from himself optical axis, and is divergent shape.
9. light homogenizer as claimed in claim 8 is characterized in that, also comprises a central shaft, perpendicular to described first and second plane and the centre by described first and second lens combination.
10. light homogenizer as claimed in claim 9, it is characterized in that, have at least the optical axis of one second beam splitting lens not superimposed in described a plurality of second beam splitting lens with the optical axis of the corresponding first beam splitting lens, and the optical axis of the described second beam splitting lens is towards away from the skew of the direction of described central shaft, so that the light beam that penetrates from the described second beam splitting lens is towards the direction deviation of described central shaft.
11. light homogenizer as claimed in claim 9 is characterized in that, also comprises:
One smooth polyunit, it is superimposed to form one than the more uniform superimposed light beam of elementary beam that light source is sent to be used for many light beams that described beam splitting arrangement is transmitted, and described smooth polyunit comprises:
One first superimposed lens are located at the rear side of described beam splitting arrangement, are used for receiving many approximately parallel light beams that described beam splitting arrangement transmits; And
One second superimposed lens are arranged at after the described first superimposed lens abreast, are used for receiving many light beams that the described first superimposed lens are transmitted, and the described first superimposed lens overlap with described central shaft with the optical axis of the described second superimposed lens;
Wherein, in many light beams process processes of described first and second superimposed lens that described beam splitting arrangement transmits, described many light beams can be by superimposed gradually, to form one than the light beam that primary source was sent more uniform one superimposed light beam.
12. light homogenizer as claimed in claim 11, it is characterized in that, the described first superimposed lens are convex lens, and the described second superimposed lens are concavees lens, and the described second superimposed lens are positioned within the focal length of the described first superimposed lens, many light beams that wherein transmit when described beam splitting arrangement are during through the described first superimposed lens, described many light beams can be towards the direction bunching of described central shaft, when many light beams of described bunching during through the described second superimposed lens, many light beams of described bunching can towards with the direction deviation of described central axes, but still keep divergent state.
13. light homogenizer as claimed in claim 8 is characterized in that, described a plurality of first beam splitting lens are a plurality of plano-convex lenss, and described a plurality of second beam splitting lens are a plurality of plano-concave lenss.
14. the projection arrangement with a light homogenizer, described projection arrangement comprises:
One light source is used for producing a light beam;
A plurality of dichronic mirrors are used for described beam separation is become RGB three monochromic beams;
A plurality of catoptrons are used for reflecting described RGB three monochromic beams;
A plurality of beam splitters;
A plurality of reflection type liquid crystal displays, it includes a half-wavelength deferred mount, is used for modulating described RGB three monochromic beams, makes it to include an image information;
Synthetic side's body of the same colour is used for the synthetic a branch of light beam that includes image of the monochromatic described image information of described RGB three beams; And
One projection lens group is used for light beam projecting to a screen that includes image with described,
Described light homogenizer comprises: a beam splitting arrangement is used for the Beam Transformation that described light source transmits is become many approximately parallel light beams; And a smooth polyunit, be used for described many light beams superimposed forming one than the more uniform superimposed light beam of light beam that primary source is sent,
It is characterized in that described smooth polyunit comprises:
One first superimposed lens are convex lens, are located at the rear side of described beam splitting arrangement, are used for receiving many approximately parallel light beams that described beam splitting arrangement transmits;
One second superimposed lens, be concavees lens, be arranged at after the described first superimposed lens abreast and be positioned within the focal length of the described first superimposed lens, be used for receiving many light beams that the described first superimposed lens are transmitted, the optical axis of the wherein said first superimposed lens and the described second superimposed lens overlaps to form a central shaft;
Wherein, many light beams that transmit when described beam splitting arrangement are during through the first superimposed lens of described smooth polyunits, described many light beams can be towards the direction deviation of described central shaft, when described many light beams during through the described second superimposed lens, described many light beams can towards with the direction deviation of described central axes, and in many light beams process processes of described first and second superimposed lens that described beam splitting arrangement transmits, described many light beams can be superimposed gradually to form described superimposed light beam.
15. projection arrangement as claimed in claim 14, it is characterized in that, described beam splitting arrangement comprises one first lens combination, described first lens combination comprises a plurality of first beam splitting lens, described a plurality of first beam splitting lens are arranged in one first plane with the kenel of array, be used for receiving the light beam that described light source transmits, wherein each first beam splitting lens can become the Beam Transformation that described light source transmits one light beam, and described a plurality of first beam splitting lens can become the Beam Transformation that described light source transmits described many light beams.
16. projection arrangement as claimed in claim 15, it is characterized in that, described beam splitting arrangement also comprises one second lens combination, between described first lens combination and the described first superimposed lens, described second lens combination comprises the corresponding second beam splitting lens of a plurality of and described a plurality of first beam splitting lens, described a plurality of second beam splitting lens are arranged in one second plane with the kenel of array, and described second plane and described first plane parallel, the described second beam splitting lens are used for receiving the light beam that first beam splitting lens corresponding with it are transmitted.
17. projection arrangement as claimed in claim 16, it is characterized in that, a plurality of first beam splitting lens of described beam splitting arrangement are a plurality of convex lens, and described a plurality of second beam splitting lens are a plurality of concavees lens, and described a plurality of second beam splitting lens are positioned within the focal length of described a plurality of first beam splitting lens, each first beam splitting lens can be with the light beam of its reception towards the direction of himself optical axis bunching in addition, to form the light beam in described many light beams, light beam that each second beam splitting lens then can transmit the corresponding first beam splitting lens is towards away from the direction of himself optical axis deviation in addition, and is divergent shape.
18. projection arrangement as claimed in claim 17, it is characterized in that, have at least the optical axis of one second beam splitting lens not superimposed in described a plurality of second beam splitting lens with the optical axis of the corresponding first beam splitting lens, and the optical axis of described second beam splitting lens system is towards the direction skew away from described central shaft, so that the light beam that penetrates from the described second beam splitting lens is towards the direction deviation of described central shaft, and be divergent state.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00128800 CN1103455C (en) | 2000-09-22 | 2000-09-22 | Light homogenizer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 00128800 CN1103455C (en) | 2000-09-22 | 2000-09-22 | Light homogenizer |
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| CN1344953A true CN1344953A (en) | 2002-04-17 |
| CN1103455C CN1103455C (en) | 2003-03-19 |
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| CN 00128800 Expired - Fee Related CN1103455C (en) | 2000-09-22 | 2000-09-22 | Light homogenizer |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7414789B2 (en) | 2004-08-17 | 2008-08-19 | Limo-Patentverwaltung Gmbh & Co. Kg | Apparatus for homogenizing light and method for producing the apparatus |
| CN101305309B (en) * | 2005-09-30 | 2010-11-10 | Limo专利管理有限及两合公司 | Apparatus for homogenizing light |
| CN102736384A (en) * | 2011-03-31 | 2012-10-17 | 卡西欧计算机株式会社 | Light source device and projector |
| CN103926675A (en) * | 2013-01-14 | 2014-07-16 | 扬明光学股份有限公司 | Image reconstructing camera and projector |
-
2000
- 2000-09-22 CN CN 00128800 patent/CN1103455C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7414789B2 (en) | 2004-08-17 | 2008-08-19 | Limo-Patentverwaltung Gmbh & Co. Kg | Apparatus for homogenizing light and method for producing the apparatus |
| CN100516934C (en) * | 2004-08-17 | 2009-07-22 | Limo专利管理有限及两合公司 | Apparatus for homogenizing light and method for producing the apparatus |
| CN101305309B (en) * | 2005-09-30 | 2010-11-10 | Limo专利管理有限及两合公司 | Apparatus for homogenizing light |
| CN102736384A (en) * | 2011-03-31 | 2012-10-17 | 卡西欧计算机株式会社 | Light source device and projector |
| CN103926675A (en) * | 2013-01-14 | 2014-07-16 | 扬明光学股份有限公司 | Image reconstructing camera and projector |
| US9268143B2 (en) | 2013-01-14 | 2016-02-23 | Young Optics Inc. | Image rearranging lens and projection apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1103455C (en) | 2003-03-19 |
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