CN101718913A - Polarization conversion color-combination prism combination - Google Patents
Polarization conversion color-combination prism combination Download PDFInfo
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- CN101718913A CN101718913A CN200910112927A CN200910112927A CN101718913A CN 101718913 A CN101718913 A CN 101718913A CN 200910112927 A CN200910112927 A CN 200910112927A CN 200910112927 A CN200910112927 A CN 200910112927A CN 101718913 A CN101718913 A CN 101718913A
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Abstract
The invention provides a polarization conversion color-combination prism combination, comprising a first prism with right-angle triangle cross section, a third prism with a rectangular cross section, and a diamond-shaped second prism with an interior-angle cross section, wherein the interior angle is complementary with the acute angle of the first prism; any right-angle surface of the third prism and an inclined surface of the first prism are respectively connected with the corresponding surfaces of the second prism, and then the coating technology and the usage of a wave plate are combined, so as to realize polarization conversion and combination of red, green and blue primary color lights; the manufacturing cost is low, the combination efficiency is high, so as to be widely applied to LCD or LCoS projection display.
Description
[technical field]
The present invention relates to a kind of electro-optic display cell, relate in particular to a kind of polarization conversion color-combination prism group.
[background technology]
In the illumination path of the photo engine that LCD (or LCoS) modulates, often need polarization conversion, especially in high-quality and the miniaturization projection display system, the LED that usually adopts three primary colours is an illumination path, this just not only needs polarization conversion, also needs the synthetic light path of three primary colours.
Traditional mode is directly to adopt polaroid to rise partially, closes look with the X-prism more at last, so just causes the energy of light source waste more than 50%, and produces big calorimetric or veiling glare.Being the use make light intensity harmless also has a large amount of element of employing to realize polarization conversion, adds the follow-up coloured light road of closing, and this makes the bulky of final system, and efficient is low, and especially difficulty is used for little optical projection systems such as mobile phone projection.
[summary of the invention]
The technical problem to be solved in the present invention, be to provide a kind of polarization conversion color-combination prism group, directly with polarization conversion with close the coloured light road and effectively combine, make simple in structure, and gummed requires simple, manufacturing cost is lower, and it is higher to close optical efficiency, can realize the synthetic Projection Display that can be widely used in LCD or LCoS of three kinds of primary lights of red, green, blue.
The present invention can realize like this: a kind of polarization conversion color-combination prism group, comprise first prism, second prism, with prism, the cross section of described first prism is a right-angle triangle, the cross section of described second prism is the mutual surplus rhombus of the acute angle of an interior angle and first prism, and the cross section of described prism is a rectangle; The arbitrary right angle face of described prism and the inclined-plane of first prism are connected with the two adjacent surfaces of the formation acute angle of described second prism respectively; Be coated with polarization beam splitter between two joint faces of described second prism and described first prism, one diagonal plane of described prism is coated with a filter coating, this filter coating is to from this prism incident and from the transmittance of the vertical outgoing of described polarization conversion color-combination prism group exit facet, simultaneously to from this prism incident and from the light reflection of the parallel outgoing of described polarization conversion color-combination prism group exit facet; This second prism that is in of described second prism is connected one first wave plate with the opposite of the joint face of prism, the right angle face that described first prism is in this first wave plate homonymy is connected with one second wave plate, the full-wave plate that this first wave plate is a ruddiness is again the half-wave plate of blue green light simultaneously, and the half-wave plate that this second wave plate is a ruddiness is again the full-wave plate of blue green light simultaneously.
The present invention also can realize like this: a kind of polarization conversion color-combination prism group, comprise first prism, second prism, with prism, the cross section of described first prism is a right-angle triangle, the cross section of described second prism is the mutual surplus rhombus of the acute angle of the interior angle and first prism, and the cross section of described prism is a rectangle; The arbitrary right angle face of described prism and the inclined-plane of first prism are connected with the two adjacent surfaces of the formation acute angle of described second prism respectively; Be coated with polarization beam splitter between two joint faces of described second prism and described first prism, one diagonal plane of described prism is coated with a filter coating, this filter coating is to from this prism incident and from the transmittance of the vertical outgoing of described polarization conversion color-combination prism group exit facet, simultaneously to from this prism incident and from the light reflection of the parallel outgoing of described polarization conversion color-combination prism group exit facet; This second prism that is in of described second prism is connected one second wave plate with the opposite of the joint face of prism, the right angle face that described first prism is in this first wave plate homonymy is connected with one first wave plate, the full-wave plate that this first wave plate is a ruddiness is again the half-wave plate of blue green light simultaneously, and the half-wave plate that this second wave plate is a ruddiness is again the full-wave plate of blue green light simultaneously.
In the above-mentioned technical scheme, it is parallel or vertical with the inclined-plane of first prism that described prism is coated with the diagonal plane of described filter coating.
The cross section of described first prism is an isosceles right triangle, and the cross section of described second prism is the rhombus that interior angle is respectively 45 ° and 135 °, and described prism is that the inclined-plane butt joint that two identical cross sections are the waist right-angle triangle forms.
The opposite of the joint face that is in this second prism and described first prism of described second prism is coated with the film that is all-trans.
The present invention can also realize like this: a kind of polarization conversion color-combination prism group, comprise first prism, second prism, with a dichroic mirror, the cross section of described first prism is a right-angle triangle, and the cross section of described second prism is the mutual surplus rhombus of the acute angle of an interior angle and first prism; The inclined-plane of described first prism is connected with a faceted pebble of described second prism, and the exit facet that makes the two is in same plane, the opposite with the described first prism joint face of described second prism is connected an end of described dichroic mirror, and described dichroic mirror is parallel with the inclined-plane of described first prism; Be coated with polarization beam splitter between two joint faces of described second prism and described first prism, described dichroic mirror is coated with a filter coating, this filter coating is to from this dichroic mirror incident and from the transmittance of the vertical outgoing of described polarization conversion color-combination prism group exit facet, simultaneously to from this dichroic mirror incident and from the light reflection of the parallel outgoing of described polarization conversion color-combination prism group exit facet; The exit facet of described second prism connects one first wave plate, the exit facet of described first prism is connected with one second wave plate, the full-wave plate that this first wave plate is a ruddiness is again the half-wave plate of blue green light simultaneously, and the half-wave plate that this second wave plate is a ruddiness is again the full-wave plate of blue green light simultaneously.
Described dichroic mirror has one and prolongs linkage section, and this prolongation linkage section covers and is connected on the faceted pebble of described second prism.
The present invention has following advantage: utilize a kind of prism, coating technique and wave plate polarization function of particular design to combine to realize to the polarization conversion of three kinds of primary lights of red, green, blue and close look, with the utilization of the full light intensity of light source such as realization LED, and can directly realize color modulation with back LCD (or LCoS).The present invention can not limit size production, simple in structure, and gummed requires simple, manufacturing cost is lower, it is higher to close optical efficiency, can realize the synthetic Projection Display that can be widely used in LCD or LCoS of three kinds of primary lights of red, green, blue, especially low-cost, the demand that the mobile phone projection that small size requires shows.
[description of drawings]
The present invention is further illustrated in conjunction with the embodiments with reference to the accompanying drawings.
Fig. 1 is the structural representation of polarization conversion color-combination prism group embodiment one of the present invention.
Fig. 2 is the structural representation of polarization conversion color-combination prism group embodiment two of the present invention.
Fig. 3 is the structural representation of polarization conversion color-combination prism group embodiment three of the present invention.
Fig. 4 is the structural representation of polarization conversion color-combination prism group embodiment four of the present invention.
Fig. 5 is the structural representation of polarization conversion color-combination prism group embodiment five of the present invention.
[embodiment]
The present invention utilizes some special plated film prisms and wave plate in conjunction with realizing three kinds of primary lights polarization conversion of red, green, blue and closing the look function.Specifically describe with following several embodiment.
Embodiment one
See also shown in Figure 1, the polarization conversion color-combination prism group of present embodiment, comprise first prism 1, second prism 2, with prism 3, the cross section of described first prism 1 is isosceles right triangle (also can be any right-angle triangle), the cross section of described prism 3 is a rectangle, and the cross section of described second prism 2 is rhombuses (its interior angle is not limited to 45 ° and 135 °, as long as surplus mutually with the acute angle of first prism 1) that interior angle is respectively 45 ° and 135 °; Be coated with polarization beam splitter (PBS) 4 between two joint faces (22) 13 of described second prism 2 and described first prism 1, the opposite (being called second outside surface 24) that is in this second prism 2 and the joint face 22 of described first prism 1 of described second prism 2 is coated be all-trans film 5 (at led light source) or not plated film and directly total reflection realize being all-trans (deciding on LED half-angle size), the diagonal plane 33 of described prism 3 is coated with the filter coating 6 to the reflection of blue light transmit green, and this diagonal plane is parallel with the inclined-plane of first prism; This second prism 2 that is in of described second prism 2 is connected one first wave plate 7 with the opposite (being called first outside surface 23) of the joint face 21 of prism 3, the right angle face 12 that described first prism 1 is in these first wave plate, 7 homonymies is connected with one second wave plate 8, the full-wave plate that this first wave plate 7 is a ruddiness is again the half-wave plate of blue green light simultaneously, and the half-wave plate that this second wave plate 8 is a ruddiness is again the full-wave plate of blue green light simultaneously.
Luminophors such as LED rubescent, green, blue primary light are placed before the right angle face 11 of first prism 1 respectively, before the right angle face 32 of prism 3 and before another right angle face 34 of prism 3.So, the red, green, blue primary lights of the random polarization that sends from luminophors such as LED, enter prism after, wherein:
Red primary light (R) enters first prism 1 from the right angle face 11 of first prism 1, be decomposed into the S polarized light of reflection (perpendicular to paper by the polarization beam splitter 4 on the inclined-plane 13 of first prism 1, represent with point among the figure, down with) and the P polarized light that sees through (be parallel to paper, represent with double-head arrow among the figure, down together).Revolved by second wave plate 8 during the red primary light outgoing of S polarization and turn 90 degrees the polarization direction and become the outgoing of P polarization.The red primary light of P polarization is all-trans film 5 reflection after 7 outgoing of first wave plate on second outside surface 24 of second prism 2, its polarization direction remains unchanged.
Blue primary light (B) enters prism 3 from the right angle face 34 of prism 3, after directly diagonal plane 33 is crossed in transmission, polarization beam splitter 4 on inclined-plane 13 is decomposed into S polarized light and P polarized light, be all-trans film 5 reflection of the reflected light of S polarized light on the second surface 24 of second prism 2 is after 7 outgoing of first wave plate, and its polarization direction is rotated by 90 degrees the polarization direction and becomes the outgoing of P polarization; The blue light of the P polarization of transmission is through 8 outgoing of second wave plate, and its polarization direction remains unchanged.
Green primary light (G) enters prism 3 from the right angle face 32 of prism 3, after 6 reflections of the filter coating on the diagonal plane 33 of prism 3, be decomposed into S polarized light and P polarized light, be all-trans film 5 reflection of the reflected light of S polarized light on the second surface 24 of second prism 2 is after 7 outgoing of first wave plate, and its polarization direction is rotated by 90 degrees the polarization direction and becomes the outgoing of P polarization; The green glow of the P polarization of transmission is through 8 outgoing of second wave plate, and its polarization direction remains unchanged.Its light path is the same with blue light with polarization.
The incident light of so just having realized the random polarization of three kinds of colors converts same polarized light (promptly being all the P polarized light) purpose to, and from by different port incident, at last all from same port outgoing, thus the effect that light is closed in realization.After the light of same polarization just can directly utilize follow-up LCD or LCoS modulating equipment to the actual amount of incident control of three primary colours light, last exit end will manifest the shades of colour of our needs.And second prism described in the present embodiment and described prism have with the identical shaped Dove prism of this second prism and the shape after prism is connected with one and replace, and its function and effect are constant.
Embodiment two
See also shown in Figure 2ly, the polarization conversion color-combination prism group of present embodiment is that the position of first wave plate among the embodiment one and second wave plate is exchanged, and all the other structures are constant.This second prism 2 that is in that is described second prism 2 is that first outside surface 23 is connected one second wave plate 8 with the opposite of the joint face 21 of prism 3, the right angle face 12 that described first prism 1 is in these first wave plate, 7 homonymies is connected with one first wave plate 7, the full-wave plate that this first wave plate 7 is a ruddiness is again the half-wave plate of blue green light simultaneously, and the half-wave plate that this second wave plate 8 is a ruddiness is again the full-wave plate of blue green light simultaneously.
Luminophors such as LED rubescent, green, blue primary light are placed before the right angle face 11 of first prism 1 respectively, before the edged surface always 32 of prism 3 and before another right angle face 34 of prism 3.So, the red, green, blue primary lights of the random polarization that sends from luminophors such as LED, enter prism after, wherein:
Red primary light (R) enters first prism 1 from the right angle face 11 of first prism 1, be decomposed into the S polarized light of reflection (perpendicular to paper by the polarization beam splitter 4 on the inclined-plane 13 of first prism 1, represent with point among the figure) and the P polarized light (be parallel to paper, represent with double-head arrow among the figure) that sees through.Directly from 7 outgoing of first wave plate, its polarization direction remains unchanged during the red primary light outgoing of S polarization.The red primary light of P polarization is all-trans film 5 reflection after second wave plate 7 revolves turn 90 degrees on second outside surface 24 of second prism 2, the polarization direction becomes outgoing behind the S polarization.
Blue primary light (B) enters prism 3 from the right angle face 34 of prism 3, directly after the transmission ground diagonal plane 33, polarization beam splitter 4 on inclined-plane 13 is decomposed into S polarized light and P polarized light, be all-trans film 5 reflection of the reflected light of S polarized light on the second surface 24 of second prism 2 is after 8 outgoing of second wave plate, and its polarization direction remains unchanged; The blue light of the P polarization of transmission is when first wave plate 7, and its polarization direction is rotated by 90 degrees the polarization direction and becomes the outgoing of S polarization.
Green primary light (G) enters prism 3 from the right angle face 32 of prism 3, after 6 reflections of the filter coating on the inclined-plane 33 of prism 3, be decomposed into S polarized light and P polarized light, be all-trans film 5 reflection of the reflected light of S polarized light on the second surface 24 of second prism 2 is after 8 outgoing of second wave plate, and its polarization direction remains unchanged; The green glow of the P polarization of transmission is through 7 outgoing of first wave plate, and its polarization direction is rotated by 90 degrees the polarization direction and becomes the outgoing of S polarization.Its light path is the same with blue light with polarization.
The incident light of so just having realized the random polarization of three kinds of colors converts same polarized light (promptly being all the S polarized light) purpose to, and from by different port incident, at last all from same port outgoing, thus the effect that light is closed in realization.After the light of same polarization just can directly utilize follow-up LCD or LCoS modulating equipment to the actual amount of incident control of three primary colours light, last exit end will manifest the shades of colour of our needs.And second prism described in the present embodiment and described prism have with the identical shaped Dove prism of this second prism and the shape after prism is connected with one and replace, and its function and effect are constant.
Embodiment three
See also shown in Figure 3ly, the polarization conversion color-combination prism group of present embodiment is that the prism among the embodiment one is rotated counterclockwise 90 °, and all the other structures are constant.Specifically: the polarization conversion color-combination prism group of present embodiment, comprise first prism 1, second prism 2, with prism 3, the cross section of described first prism 1 is isosceles right triangle (also can be any right-angle triangle), the cross section of described prism 3 is a rectangle, the cross section of described second prism 2 is rhombuses (its interior angle is not limited to 45 ° and 135 °, as long as surplus mutually with the acute angle of first prism 1) that interior angle is respectively 45 ° and 135 °; The two adjacent surfaces 21 (22) that forms the acute angle 45 in described second prism 2 is connected with another right angle face 32 of described prism 3 and the inclined-plane 13 of first prism 1 respectively; Be coated with polarization beam splitter (PBS) 4 between two joint faces (22) 13 of described second prism 2 and described first prism 1, the opposite that is in this second prism 2 and the joint face 22 of described first prism 1 of described second prism 2 promptly second outside surface 24 be coated be all-trans film 5 (at led light source) or not plated film and directly total reflection realize being all-trans, the diagonal plane 33 of described prism 3 is coated with the filter coating 6 to the reflection of blue light transmit green, and this diagonal plane is vertical with the inclined-plane of first prism; This second prism 2 that is in of described second prism 2 is that first outside surface 23 is connected one first wave plate 7 with the opposite of the joint face 21 of prism 3, the right angle face 12 that described first prism 1 is in these first wave plate, 7 homonymies is connected with one second wave plate 8, the full-wave plate that this first wave plate 7 is a ruddiness is again the half-wave plate of blue green light simultaneously, and the half-wave plate that this second wave plate 8 is a ruddiness is again the full-wave plate of blue green light simultaneously.
Luminophors such as LED rubescent, green, blue primary light are placed before the right angle face 11 of first prism 1 respectively, before the right angle face 31 of prism 3 and before another right angle face 35 of prism 3.So, the red, green, blue primary lights of the random polarization that sends from luminophors such as LED, enter prism after, wherein:
Red primary light among the light path of red primary light (R) and polarization and the embodiment one identical repeats no more herein.
Blue primary light among the light path of blue primary light (B) and polarization and the embodiment one identical repeats no more herein.
Green primary light (G) changes into from another right angle face 31 of prism 3 and enters prism 3, the green primary light among remaining light path and polarization and the embodiment one identical.
This embodiment can realize that equally the incident light of the random polarization of three kinds of colors converts same polarized light (promptly being all the P polarized light) purpose to, and from by different port incident, at last all from same port outgoing, thus the effect that light is closed in realization.After the light of same polarization just can directly utilize follow-up LCD or LCoS modulating equipment to the actual amount of incident control of three primary colours light, last exit end will manifest the shades of colour of our needs.
Embodiment four
See also shown in Figure 4ly, the polarization conversion color-combination prism group of present embodiment is that the position of first wave plate among the embodiment three and second wave plate is exchanged, and all the other structures are constant.This second prism 2 that is in that is described second prism 2 is that first outside surface 23 is connected one second wave plate 8 with the opposite of the joint face 21 of prism 3, the right angle face 12 that described first prism 1 is in these first wave plate, 7 homonymies is connected with one first wave plate 7, the full-wave plate that this first wave plate 7 is a ruddiness is again the half-wave plate of blue green light simultaneously, and the half-wave plate that this second wave plate 8 is a ruddiness is again the full-wave plate of blue green light simultaneously.
Luminophors such as LED rubescent, green, blue primary light are placed before the right angle face 11 of first prism 1 respectively, before the edged surface always 31 of prism 3 and before another right angle face 35 of prism 3.So, the red, green, blue primary lights of the random polarization that sends from luminophors such as LED, enter prism after, wherein:
Red primary light among the light path of red primary light (R) and polarization and the embodiment three identical repeats no more herein.
Blue primary light among the light path of blue primary light (B) and polarization and the embodiment three identical repeats no more herein.
Green primary light (G) changes into from the right angle face 31 of prism 3 and enters prism 3, the green primary light among remaining light path and polarization and the embodiment three identical.
This embodiment can realize that equally the incident light of the random polarization of three kinds of colors converts same polarized light (promptly being all the S polarized light) purpose to, and from by different port incident, at last all from same port outgoing, thus the effect that light is closed in realization.After the light of same polarization just can directly utilize follow-up LCD or LCoS modulating equipment to the actual amount of incident control of three primary colours light, last exit end will manifest the shades of colour of our needs.
Embodiment five
See also shown in Figure 5, the polarization conversion color-combination prism group of present embodiment, comprise first prism 1, second prism 2, with a dichroic mirror 3 ', the cross section of described first prism 1 is isosceles right triangle (also can be any right-angle triangle), the cross section of described prism 3 ' is a thin slice, and the cross section of described second prism 2 is rhombuses (its interior angle is not limited to 45 ° and 135 °, as long as surplus mutually with the acute angle of first prism 1) that interior angle is respectively 45 ° and 135 °
The inclined-plane 13 of described first prism 1 is connected with a faceted pebble 22 of described second prism 2, and make the exit facet 12 (23) of the two be in same plane, the opposite 24 with described first prism, 1 joint face 22 of described second prism 2 is connected an end of described dichroic mirror 3 ', for easy to connect, described dichroic mirror 3 ' has one and prolongs linkage section 30, and this prolongation linkage section 30 covers and is connected on the faceted pebble 24 of described second prism 2.And described dichroic mirror 3 ' is parallel with the inclined-plane 13 of described first prism 1; Be coated with polarization beam splitter 4 between two joint faces of described second prism 2 and described first prism 1, described dichroic mirror 3 ' is coated with a filter coating 6,6 pairs of this filter coatings are from this dichroic mirror 3 ' incident and from the transmittance of the vertical outgoing of described polarization conversion color-combination prism group exit facet, simultaneously to from this dichroic mirror 3 ' incident and from the light reflection of the parallel outgoing of described polarization conversion color-combination prism group exit facet; The exit facet of described second prism 2 connects one first wave plate 7, the exit facet of described first prism 1 is connected with one second wave plate 8, the full-wave plate that this first wave plate 7 is a ruddiness is again the half-wave plate of blue green light simultaneously, and the half-wave plate that this second wave plate 8 is a ruddiness is again the full-wave plate of blue green light simultaneously.
Luminophors such as LED rubescent, green, blue primary light are placed before the right angle face 11 of first prism 1 respectively, dichroic mirror 3 ' before and be parallel to exit facet 12 (23) and dichroic mirror 3 ' before and perpendicular to exit facet 12 (23).So, the red, green, blue primary lights of the random polarization that sends from luminophors such as LED, enter prism after, wherein:
Red primary light (R) enters first prism 1 from the right angle face 11 of first prism 1, be decomposed into the S polarized light of reflection (perpendicular to paper by the polarization beam splitter 4 on the inclined-plane 13 of first prism 1, represent with point among the figure, down with) and the P polarized light that sees through (be parallel to paper, represent with double-head arrow among the figure, down together).Revolved by second wave plate 8 during the red primary light outgoing of S polarization and turn 90 degrees the polarization direction and become the outgoing of P polarization.The red primary light of P polarization is all-trans film 5 reflection after 7 outgoing of first wave plate on second outside surface 24 of second prism 2, its polarization direction remains unchanged.
After blue primary light (B) enters the direct transmission in back from dichroic mirror 3 ', polarization beam splitter 4 on inclined-plane 13 is decomposed into S polarized light and P polarized light, be all-trans film 5 reflection of the reflected light of S polarized light on the second surface 24 of second prism 2 is after 7 outgoing of first wave plate, and its polarization direction is rotated by 90 degrees the polarization direction and becomes the outgoing of P polarization; The blue light of the P polarization of transmission is through 8 outgoing of second wave plate, and its polarization direction remains unchanged.
Green primary light (G) enters from dichroic mirror 3 ', after filter coating 6 reflections, be decomposed into S polarized light and P polarized light, be all-trans film 5 reflection of the reflected light of S polarized light on the second surface 24 of second prism 2 is after 7 outgoing of first wave plate, and its polarization direction is rotated by 90 degrees the polarization direction and becomes the outgoing of P polarization; The green glow of the P polarization of transmission is through 8 outgoing of second wave plate, and its polarization direction remains unchanged.Its light path is the same with blue light with polarization.
The incident light of so just having realized the random polarization of three kinds of colors converts same polarized light (promptly being all the P polarized light) purpose to, and from by different port incident, at last all from same port outgoing, thus the effect that light is closed in realization.After the light of same polarization just can directly utilize follow-up LCD or LCoS modulating equipment to the actual amount of incident control of three primary colours light, last exit end will manifest the shades of colour of our needs.
In sum, utilize a kind of prism, coating technique and wave plate polarization function of particular design to combine to realize to the polarization conversion of three kinds of primary lights of red, green, blue and close look, can realize that emergent light is the P polarized light entirely, after first wave plate and the second wave plate position are exchanged, can realize that again emergent light is the S polarized light entirely.The film that is plated of the cemented surface that also can be by changing second prism and the plated film face of each prism just can be realized the variation of concrete incident light position, realizing the utilization of the full light intensity of light source such as LED, and can directly realize color modulation with back LCD (or LCoS).Each prism can adopt gummed with combining of wave plate or deepen the method for optical cement, and the latter is used for high-power use.
Claims (10)
1. polarization conversion color-combination prism group, it is characterized in that: comprise first prism, second prism, with prism, the cross section of described first prism is a right-angle triangle, the cross section of described second prism is the mutual surplus rhombus of the acute angle of an interior angle and first prism, and the cross section of described prism is a rectangle;
The arbitrary right angle face of described prism and the inclined-plane of first prism are connected with the two adjacent surfaces of the formation acute angle of described second prism respectively;
Be coated with polarization beam splitter between two joint faces of described second prism and described first prism, one diagonal plane of described prism is coated with a filter coating, this filter coating is to from this prism incident and from the transmittance of the vertical outgoing of described polarization conversion color-combination prism group exit facet, simultaneously to from this prism incident and from the light reflection of the parallel outgoing of described polarization conversion color-combination prism group exit facet;
This second prism that is in of described second prism is connected one first wave plate with the opposite of the joint face of prism, the right angle face that described first prism is in this first wave plate homonymy is connected with one second wave plate, the full-wave plate that this first wave plate is a ruddiness is again the half-wave plate of blue green light simultaneously, and the half-wave plate that this second wave plate is a ruddiness is again the full-wave plate of blue green light simultaneously.
2. polarization conversion color-combination prism group according to claim 1 is characterized in that: it is parallel or vertical with the inclined-plane of first prism that described prism is coated with the diagonal plane of described filter coating.
3. polarization conversion color-combination prism group according to claim 2, it is characterized in that: the cross section of described first prism is an isosceles right triangle, the cross section of described second prism is the rhombus that interior angle is respectively 45 ° and 135 °, and described prism is that the inclined-plane butt joint that two identical cross sections are the waist right-angle triangle forms.
4. polarization conversion color-combination prism group according to claim 1 is characterized in that: the opposite of the joint face that is in this second prism and described first prism of described second prism is coated with the film that is all-trans.
5. polarization conversion color-combination prism group, it is characterized in that: comprise first prism, second prism and prism, the cross section of described first prism is a right-angle triangle, the cross section of described second prism is the mutual surplus rhombus of the acute angle of the interior angle and first prism, and the cross section of described prism is a rectangle;
The arbitrary right angle face of described prism and the inclined-plane of first prism are connected with the two adjacent surfaces of the formation acute angle of described second prism respectively;
Be coated with polarization beam splitter between two joint faces of described second prism and described first prism, one diagonal plane of described prism is coated with a filter coating, this filter coating is to from this prism incident and from the transmittance of the vertical outgoing of described polarization conversion color-combination prism group exit facet, simultaneously to from this prism incident and from the light reflection of the parallel outgoing of described polarization conversion color-combination prism group exit facet;
This second prism that is in of described second prism is connected one second wave plate with the opposite of the joint face of prism, the right angle face that described first prism is in this first wave plate homonymy is connected with one first wave plate, the full-wave plate that this first wave plate is a ruddiness is again the half-wave plate of blue green light simultaneously, and the half-wave plate that this second wave plate is a ruddiness is again the full-wave plate of blue green light simultaneously.
6. polarization conversion color-combination prism group according to claim 5 is characterized in that: it is parallel or vertical with the inclined-plane of first prism that described prism is coated with the diagonal plane of described filter coating.
7. polarization conversion color-combination prism group according to claim 6, it is characterized in that: the cross section of described first prism is an isosceles right triangle, the cross section of described second prism is the rhombus that interior angle is respectively 45 ° and 135 °, and described prism is that the inclined-plane butt joint that two identical cross sections are the waist right-angle triangle forms.
8. polarization conversion color-combination prism group according to claim 5 is characterized in that: the opposite of the joint face that is in this second prism and described first prism of described second prism is coated with the film that is all-trans.
9. polarization conversion color-combination prism group, it is characterized in that: comprise first prism, second prism and a dichroic mirror, the cross section of described first prism is a right-angle triangle, the cross section of described second prism is the acute angle surplus rhombus mutually of an interior angle and first prism;
The inclined-plane of described first prism is connected with a faceted pebble of described second prism, and the exit facet that makes the two is in same plane, the opposite with the described first prism joint face of described second prism is connected an end of described dichroic mirror, and described dichroic mirror is parallel with the inclined-plane of described first prism;
Be coated with polarization beam splitter between two joint faces of described second prism and described first prism, described dichroic mirror is coated with a filter coating, this filter coating is to from this dichroic mirror incident and from the transmittance of the vertical outgoing of described polarization conversion color-combination prism group exit facet, simultaneously to from this dichroic mirror incident and from the light reflection of the parallel outgoing of described polarization conversion color-combination prism group exit facet;
The exit facet of described second prism connects one first wave plate, the exit facet of described first prism is connected with one second wave plate, the full-wave plate that this first wave plate is a ruddiness is again the half-wave plate of blue green light simultaneously, and the half-wave plate that this second wave plate is a ruddiness is again the full-wave plate of blue green light simultaneously.
10. polarization conversion color-combination prism group according to claim 9 is characterized in that: described dichroic mirror has one and prolongs linkage section, and this prolongation linkage section covers and is connected on the faceted pebble of described second prism.
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| CN2009101129273A CN101718913B (en) | 2009-12-08 | 2009-12-08 | Polarization conversion color-combination prism combination |
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| CN2009101129273A CN101718913B (en) | 2009-12-08 | 2009-12-08 | Polarization conversion color-combination prism combination |
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| CN101718913B CN101718913B (en) | 2011-07-27 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102540482A (en) * | 2010-12-13 | 2012-07-04 | 红蝶科技(深圳)有限公司 | Projecting system with double extinction ratios |
| CN103424878A (en) * | 2012-12-02 | 2013-12-04 | 上海理工大学 | Polarization light-splitting device |
| CN104656264A (en) * | 2013-11-22 | 2015-05-27 | 华为技术有限公司 | Polarization beam splitting and combining device |
| CN102540482B (en) * | 2010-12-13 | 2016-12-14 | 红蝶科技(深圳)有限公司 | A kind of projecting system with double extinction ratios |
| CN114137728A (en) * | 2021-12-03 | 2022-03-04 | 上海首镜科技有限公司 | High-efficiency high-brightness light path transmission method and optical mechanism |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2515687Y (en) * | 2001-12-28 | 2002-10-09 | 北京澳柯玛视美乐信息技术有限公司 | Colour splitting colour-synthesizing prism |
| CN100449334C (en) * | 2006-08-14 | 2009-01-07 | 上海飞锐光电科技有限公司 | Tricolor light isosceles trapezoid color-recombination combined prism |
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2009
- 2009-12-08 CN CN2009101129273A patent/CN101718913B/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102540482A (en) * | 2010-12-13 | 2012-07-04 | 红蝶科技(深圳)有限公司 | Projecting system with double extinction ratios |
| CN102540482B (en) * | 2010-12-13 | 2016-12-14 | 红蝶科技(深圳)有限公司 | A kind of projecting system with double extinction ratios |
| CN103424878A (en) * | 2012-12-02 | 2013-12-04 | 上海理工大学 | Polarization light-splitting device |
| CN103424878B (en) * | 2012-12-02 | 2015-11-25 | 上海理工大学 | Light splitting device |
| CN104656264A (en) * | 2013-11-22 | 2015-05-27 | 华为技术有限公司 | Polarization beam splitting and combining device |
| CN114137728A (en) * | 2021-12-03 | 2022-03-04 | 上海首镜科技有限公司 | High-efficiency high-brightness light path transmission method and optical mechanism |
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| Publication number | Publication date |
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| CN101718913B (en) | 2011-07-27 |
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