CN101470275B - Light source switching mechanism used for projection system - Google Patents
Light source switching mechanism used for projection system Download PDFInfo
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- CN101470275B CN101470275B CN2008102138824A CN200810213882A CN101470275B CN 101470275 B CN101470275 B CN 101470275B CN 2008102138824 A CN2008102138824 A CN 2008102138824A CN 200810213882 A CN200810213882 A CN 200810213882A CN 101470275 B CN101470275 B CN 101470275B
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Abstract
The invention relates to a light source switching device for a projection system, which comprises at least two light guidance devices and at least one phase switching device. The phase switching device arranged between the two light guidance devices is provided with a first switching state and a second switching state. When the first light enters the light source switching device, the phase switching device is located in the first switching state to enable the first light to emit outwardly appropriately, when the second light enters the light source switching device, the phase switching device is located in the second switching state to enable the second light to emit outwardly appropriately. Therefore, through switching actions of the phase switching device, a plurality of light provided by a plurality of light sources can be selected, and can be uniformized by the light source switching device.
Description
Technical field
The invention relates to a kind of light source switching mechanism that is used for an optical projection system, more specifically say, is can select Different Light according to specific time sequence about a kind of, light source is provided the light source switching mechanism to optical projection system.
Background technology
For saving power consumption and device volume, many optical projection systems gradually adopt light emitting diode (LED) as light source.Light emitting diode has short advantage of starting time, is used in the optical projection system, can solve the problem that conventional high-tension mercury lamp optical projection system can't quick turn-on.Because the utilization of light source is subjected to the restriction of light exhibition amount (é tendue) conservation, means only to have and begin to be effective light in the light source of qualification area and the light angle.When desire increases the light-source brightness of optical projection system, be not only can solve by the number that increases light emitting diode, make that promoting light emitting diode is the brightness of the optical projection system of light source, for this reason industry bottleneck for a long time.
Existing optical projection system is with discontinuous pulses driven for emitting lights diode, and by importing higher electric current to promote brightness, its synoptic diagram is as shown in Figure 1.This optical projection system 1 comprises the first light-emitting diode component 11a, the second light-emitting diode component 11b, a mirror wheel 13, a motor (scheming not shown), a digital micro-mirror device (DigitalMicromirror Device, DMD) 15, one prism 17 and an imaging len 19.Each light-emitting diode component 11a, 11b all have redness, green and blue LED (scheming not shown), and the three is luminous in turn, and so that light to be provided, mirror wheel 13 then is arranged between this two light-emitting diode component 11a, the 11b.
Mirror wheel 13 comprises a plurality of fan-shaped reflector space and penetration region that are crisscross arranged, with its axle center rotation.When making the first light-emitting diode component 11a luminous, a wherein penetration region of motor driven mirror wheel 13 synchronously rotates to the light beam of the first light-emitting diode component 11a and penetrates the corresponding position of direction, makes light beam pass through penetration region and past outbound course ejaculation; The second light-emitting diode component 11b is luminous when making, this moment, the first light-emitting diode component 11a stopped to launch light beam, and a wherein reflector space of mirror wheel 13 rotates to the light beam of the second light-emitting diode component 11b and penetrates the corresponding position of direction, makes beam reflection and similarly past outbound course ejaculation.By above-mentioned action, just can make two light-emitting diode component 11a, 11b provide required light, and see it by naked eyes in the mode of fast crosstalk, this light is an intimate continuous light.
Yet in actual operation, form, therefore must form some juncture areas therebetween because of mirror wheel 13 is interlocked by a plurality of reflector spaces and penetration region.If the whole or part of arbitrary light-emitting diode component light beam just falls within this juncture area, not only lost part light, also reduce the instantaneous flux of outlet light.For avoiding light to scatter and disappear, just need control light beam that light-emitting diode component produces and avoid juncture area as far as possible, but since light-emitting diode component position predetermined fixed is set, so only can make mirror wheel 13 juncture area rotation and before the convergence light beam, just extinguish light-emitting diode component ahead of time, activate the light-emitting diode component of subtend more immediately; In other words, even also juncture area falls within the pass closed state as far as possible, treat that juncture area passes through the light-emitting diode component of subtend after, make another light-emitting diode component shinny again.
Even so, light-emitting diode component provides a light beam of extremely dispersing, but not as the optically focused light beam of ellipsoid lamp generation, the parallel beam that also non-parabolic lamp provides.Therefore, when the light beam of light-emitting diode component is projeced on the mirror wheel 13, will occupy suitable area, the operation that above-mentioned control light-emitting diode component flickers probably can't be reached the effect of expection.In addition, mirror wheel 13 has the many places juncture area, and for avoiding each intersection, mirror wheel 13 just has suitable area and can't utilize, and this measure is as good as the noncontinuity that improves luminous flux, and has significantly lowered the service efficiency of mirror wheel 13.
On the other hand, the switching between the light-emitting diode component need cooperate operating assemblies such as mirror wheel 13 and motor simultaneously.Because the switching of light-emitting diode component is to be reached by electric signal, and the reaction of running such as mirror wheel 13 and motor element starting is slower, therefore adding these elements easily has calibration error and wearing and tearing, is difficult to accurately to cooperate the switch speed of LED source and switching time at interval.Except, this configuration adopts mirror wheel to integrate light beam fully, and every use one mirror wheel just can make the size of optical projection system significantly increase, and is limited to the requirement of industry to volume, and the brightness that makes this configuration to improve is limited.
In sum, the configuration of the LED source of existing optical projection system has that luminous flux is discontinuous, the light source switch speed is slower, bulky and problem such as arrangements of components complexity, in view of this, a kind of quick toggle lights is provided, size is less and integral member disposes easy light-source system, this be this industry the target reached of common hope.
Summary of the invention
A purpose of the present invention provides a kind of light source switching mechanism that is used for an optical projection system, but makes the suitable alternative expression ground (alternately) of optical projection system that one first light and one second light are provided.This light source switching mechanism can make optical projection system not need can increase light intensity by mirror wheel, and can make that luminous flux is more continuous, the light source switch speed is faster, dwindles overall dimensions and simplify arrangements of components.In addition, this light source switching mechanism also can be used as light accumulation column, under the situation that does not increase etendue, still brightness can be improved several times.
For achieving the above object, the present invention just provides a light source switching mechanism, and it comprises one first light guidance devices, one second light guidance devices and a phase switching device.First light guidance devices has one first incidence surface and is one second parallel incidence surface with first incidence surface is non-.Second light guidance devices has an exiting surface.Phase switching device is located between first light guidance devices and second light guidance devices, and it has one first switching state and one second switching state.When first light when first incidence surface enters first light guidance devices, phase switching device is suitable to be in first switching state, makes first light in by phase switching device and after entering second light guidance devices, suitable can outwards the projection towards exiting surface; When second light when second incidence surface enters first light guidance devices, phase switching device is suitable to be in second switching state, makes second light in by phase switching device and after entering second light guidance devices, suitable can outwards the projection towards exiting surface.
For achieving the above object, the present invention provides a light source switching mechanism in addition, and it comprises one first light guidance devices, one second light guidance devices, one the 3rd light guidance devices, one first phase switching device and one second phase switching device.First light guidance devices has one first incidence surface and is one second parallel incidence surface with first incidence surface is non-.Second light guidance devices have with first incidence surface and second incidence surface wherein one non-ly be one the 3rd parallel incidence surface.The 3rd light guidance devices has an exiting surface.First phase switching device is located between first light guidance devices and second light guidance devices, and it has one first switching state and one second switching state.Second phase switching device is located between second light guidance devices and the 3rd light guidance devices, and it has one the 3rd switching state and one the 4th switching state.Wherein when first light when first incidence surface enters first light guidance devices, suitable first switching state that is in of first phase switching device, make first light in by first phase switching device and after entering second light guidance devices, suitable can the projection towards second phase switching device and the 3rd light guidance devices, suitable the 3rd switching state that is in of second changeable switch this moment, make first light by the second changeable switch and after entering the 3rd light guidance devices, suitable can outwards the projection towards exiting surface.When second light when second incidence surface enters first light guidance devices, suitable second switching state that is in of first phase switching device, make second light in by first phase switching device and after entering second light guidance devices, suitable can the projection towards second phase switching device and the 3rd light guidance devices, suitable the 3rd switching state that is in of second changeable switch this moment, make second light by the second changeable switch and after entering the 3rd light guidance devices, suitable can outwards the projection towards exiting surface.When the 3rd light when the 3rd incidence surface enters second light guidance devices, suitable the 4th switching state that is in of second phase switching device, make the 3rd light in by second phase switching device and after entering the 3rd light guidance devices, fit and outwards to throw towards exiting surface.
Description of drawings
For above-mentioned purpose of the present invention, technical characterictic and advantage can be become apparent, below conjunction with figs. is elaborated to preferred embodiment of the present invention, wherein:
Fig. 1 is existing optical projection system synoptic diagram;
Fig. 2 A is the synoptic diagram that guides first light according to the light source switching mechanism of first embodiment of the invention;
Fig. 2 B is the synoptic diagram that guides second light according to the light source switching mechanism of first embodiment of the invention;
Fig. 3 is an optical projection system schematic perspective view of using the light source switching mechanism guiding of first embodiment of the invention;
Fig. 4 A is the synoptic diagram that guides first light according to the light source switching mechanism of second embodiment of the invention;
Fig. 4 B is the synoptic diagram that guides second light according to the light source switching mechanism of second embodiment of the invention; And
Fig. 4 C is the synoptic diagram that guides the 3rd light according to the light source switching mechanism of second embodiment of the invention.
Embodiment
The first embodiment of the present invention is a light source switching mechanism 2, and it comprises one first light guidance devices 21, one second light guidance devices 23 and a phase switching device 25, shown in Fig. 2 A and Fig. 2 B.This light source switching mechanism 2 is to be used for an optical projection system (scheming not shown), and it has one first light-emitting diode component 20 and one second light-emitting diode component 22, but suitable alternative expression ground (alternately) provides one first light 200 and one second light 220.Each light-emitting diode component has a red light emitting diodes (scheming not shown), a blue LED (scheming not shown) and a green LED (scheming not shown).First light 200 and second light 220 are to provide according to sequential alternative expression ground, and in this embodiment, first light 200 and second light 220 are proper all according to 50% sequential complementation and light alternately is provided.
First light guidance devices 21 comprises first reflection unit 213 of one first polarization device 211 and the 211 adjacent settings of one and first polarization device.First polarization device 211 has one first incidence surface 211a and one second incidence surface 211b, and the second incidence surface 211b is parallel with the first incidence surface 211a is non-, and in this embodiment, the second incidence surface 211b is just adjacent and vertical with the first incidence surface 211a.In this embodiment, first polarization device 211 comprise one first the polarization spectroscope (polarizing beam splitter, PBS) 215, it is a cuboid, has inclined-plane, one first diagonal angle.The first polarization spectroscope 215 has more one first polarization light splitting surface, is seated on the inclined-plane, aforementioned first diagonal angle.First reflection unit 213 comprises one first catoptron 217, and first reflection unit 213 is triangular prisms, and it has one first inclined-plane, and aforementioned first catoptron 217 just is seated on first inclined-plane.
Second light guidance devices 23 has an exiting surface 231a.Second light guidance devices 23 comprises second reflection unit 233 of one second polarization device 231 and the 231 adjacent settings of one and second polarization device, second polarization device 231 defines aforementioned exiting surface 231a, just one of them is vertical with the first incidence surface 211a and the second incidence surface 211b for this exiting surface 231a, in this embodiment, the extension line of exiting surface 231a is suitable vertical with the extension line of the first incidence surface 211a.In this embodiment, second polarization device 231 comprises one second polarization spectroscope 235, and it is a cuboid, has inclined-plane, one second diagonal angle.The second polarization spectroscope 235 has more one second polarization light splitting surface, is seated on the inclined-plane, aforementioned second diagonal angle.Second reflection unit 233 comprises one second catoptron 237, and second reflection unit 233 is triangular prisms, and it has one second inclined-plane, and aforementioned second catoptron 237 just is seated on second inclined-plane.
In present embodiment, the second polarization spectroscope 235 of the first polarization spectroscope 215 of first polarization device 211 and second polarization device 231 is a MacNeille prism, and this kind prism is that parallel polarization light is penetrated, and makes the reflection of vertical polarization light.
Shown in Fig. 2 A, when first light 200 that first light-emitting diode component 20 is produced after the first incidence surface 211a enters first polarization device 211 in first light guidance devices 21, suitable can be separated into one first level by the first polarization spectroscope 215 and penetrate light 200a and one first level reflected light 200b, more definite theory, after MacNeille prismatic decomposition, it is a parallel polarization light (P polarized light) that described first level penetrates light 200a, and first level reflected light 200b is a vertical polarization light (S polarized light).Because this moment, phase switching device 25 suitablely was in first switching state, that is non-switching phase state, so when passing through phase switching device 25, the polarization phase that first level penetrates light 200a and first level reflected light 200b is not all changed.
First level penetrates after light 200a tells by the first polarization spectroscope 215, enters second light guidance devices 23 by phase switching device 25, and reflect and throw towards the second polarization spectroscope 235 by second catoptron 237.Because it is a parallel polarization light at this moment that first level penetrates light 200a,, and outwards throw towards exiting surface 231a so suitable can passing through is the second polarization spectroscope 235 of MacNeille prism.
On the other hand, after first level reflected light 200b told by the first polarization spectroscope 215, be, by phase switching device 25 and enter second light guidance devices 23, towards 235 projections of the second polarization spectroscope by 217 reflections of first catoptron.Because first level reflected light 200b is a vertical polarization light at this moment, thus suitable can the reflection by the second polarization spectroscope 235, that is reflected by the MacNeille prism, and outwards throw towards exiting surface 231a.
Wherein, first level penetrates light 200a and first level reflected light 200b in respectively at by the second polarization spectroscope 235 and be subjected to the second polarization spectroscope, 235 reflex times, just can be combined into the first original light 200, outwards to throw towards exiting surface 231a.
Shown in Fig. 2 B, when second light 220 that second light-emitting diode component 22 is produced after the second incidence surface 211b enters first polarization device 211 in first light guidance devices 21, suitablely can be separated into a second subprime by the first polarization spectroscope 215 and penetrate a light 220b and a second subprime reflected light 220a.More definite theory, after MacNeille prismatic decomposition, it is a parallel polarization light that described second subprime penetrates light 220b, and second subprime reflected light 220a is a vertical polarization light.Because phase switching device 25 is fitted and is in second switching states at this moment, that is switching phase state, so during by phase switching device 25, the polarization phase that second subprime penetrates light 220b and second subprime reflected light 220a is all changed, and is transformed into vertical polarization light and a parallel polarization light respectively.
After second subprime penetrates light 220b spectroscope 215 tells by first polarization, be, by phase switching device 25 and enter second light guidance devices 23, towards 235 projections of the second polarization spectroscope by 217 reflections of first catoptron.Because penetrating light 220b, suitable second switching states that are in of phase switching device 25 this moment, second subprime then change a vertical polarization light into after by phase switching device 25, thus then reflected by the second polarization spectroscope 235, and outwards throw towards exiting surface 231a.
Second subprime reflected light 220a enters second light guidance devices 23 by phase switching device 25 after spectroscope 215 tells by first polarization, and reflects and throw towards the second polarization spectroscope 235 by second catoptron.Because suitable second switching states that are in of phase switching device 25 this moment, second subprime reflected light 220a then change a parallel polarization light into so follow the penetrable second polarization spectroscope 235 after by phase switching device 25, and outwards throw towards exiting surface 231a.
Wherein, second subprime penetrates light 220b and second subprime reflected light 220a and is subjected to 235 reflections of the second polarization spectroscope respectively and by behind the second polarization spectroscope 235, just can be combined into the second original light 220, outwards to throw towards exiting surface 231a.
In this embodiment, light source switching mechanism 2 is one-body molded; Implement in the aspect in other, light source switching mechanism 2 also can be made up of several parts.No matter be formed in one or combine respectively, light source switching mechanism 2 can be considered the combination of a plurality of prisms.And in this embodiment, light source switching mechanism 2 also can be used as the usefulness of a light accumulation column.The light that switches gained do not need light accumulation column just can be in light source switching mechanism 2 homogenising.
The light source switching mechanism of the foregoing description can be applicable to an optical projection system 3, its schematic perspective view is as shown in Figure 3, optical projection system 3 comprises light source switching mechanism 2, one first light-emitting diode component 20, one second light-emitting diode component 22, a prism 34, a digital micro-mirror device (Digital Micromirror Device, DMD) 36 and one imaging len 38 of the foregoing description.
Each light- emitting diode component 20,22 comprises a red light emitting diodes 31, a blue LED 33 and a green LED (scheming not shown), several lens 35, a forked type refracting plate (X-Plate) 37.Three light emitting diodes of each light- emitting diode component 20,22 produce light according to specific time sequence, and after scioptics 35 optically focused and 37 beam split of forked type refracting plate, produce first light and second light.First light and second light are alternately to provide according to a sequential.
First light and second light that first light-emitting diode component 20 and second light-emitting diode component 22 are produced enter light source switching mechanism 2 according to sequential respectively, phase switching device (scheming not shown) by light source switching mechanism 2 inside is switched according to sequential, and in light source switching mechanism 2, after the homogenising, penetrate respectively.First light that projects and second light are mutually alternately, so can be considered a continuous light.This continuous light by after prism 34 reflections, digital micro-mirror device 36 imagings, just penetrates from imaging lens 38 again.
The second embodiment of the present invention also is a light source switching mechanism 4, it comprises one first light guidance devices 41, one second light guidance devices 43, one the 3rd light guidance devices 45, one first phase switching device 47 and one second phase switching device 49, shown in Fig. 4 A, Fig. 4 B and Fig. 4 C.This light source switching mechanism 4 can be applicable to an optical projection system (scheming not shown) equally, it comprises one first light-emitting diode component 40, one second light-emitting diode component 42 and one the 3rd light-emitting diode component 44, suitable one first light 400, one second light 420 and one the 3rd light 440 of providing respectively alternative expression.Each light- emitting diode component 40,42,44 has a red light emitting diodes (scheming not shown), a blue LED (scheming not shown) and a green LED (scheming not shown).First light 400, second light 420 and the 3rd light 440 are to provide with complying with a sequential alternative expression.
First light guidance devices 41 comprises first reflection unit 413 of one first polarization device 411 and the 411 adjacent settings of one and first polarization device, first polarization device 411 has and defines the first incidence surface 411a and the second incidence surface 411b, the second incidence surface 411b is parallel with the first incidence surface 411a is non-, in this embodiment, the second incidence surface 411b is just adjacent and vertical with the first incidence surface 411a.In this embodiment, first polarization device 411 comprises one first polarization spectroscope 415, and it is a cuboid, has inclined-plane, one first diagonal angle.The first polarization spectroscope 415 also has one first polarization light splitting surface, is seated on the inclined-plane, aforementioned first diagonal angle.First reflection unit 413 comprises one first catoptron 417, and first reflection unit 413 is triangular prisms, and it has one first inclined-plane, and aforementioned first catoptron 417 just is seated on first inclined-plane.
Second light guidance devices 43 has that one of them non-ly is one the 3rd parallel incidence surface 433a with the first incidence surface 411a and the second incidence surface 411b, in this embodiment, the 3rd incidence surface 433a right position is on the extension line of the second incidence surface 411b, with suitable vertical with the first incidence surface 411a.Second light guidance devices 43 comprises the 3rd polarization device 433 of one second polarization device 431 and the 431 adjacent settings of one and second polarization device, second polarization device 431 defines aforementioned the 3rd incidence surface 433a, in this embodiment, the 3rd incidence surface 433a is just adjacent with the second incidence surface 411b, and just vertical with the first incidence surface 411a.In this embodiment, second polarization device 431 comprises one second polarization spectroscope 435, and it is a cuboid, has inclined-plane, one second diagonal angle.The second polarization spectroscope 435 also has one second polarization light splitting surface, is seated on the inclined-plane, aforementioned second diagonal angle.The 3rd polarization device 433 comprises one the 3rd polarization spectroscope 437, and it is a cuboid, has inclined-plane, one the 3rd diagonal angle.The 3rd polarization spectroscope 437 also has one the 3rd polarization light splitting surface, is seated on the inclined-plane, aforementioned the 3rd diagonal angle.
The 3rd light guidance devices 45 has an exiting surface 451a.The 3rd light guidance devices 45 comprises second reflection unit 453 of one the 4th polarization device 451 and the 451 adjacent settings of the one and the 4th polarization device, the 4th polarization device 451 defines aforementioned exiting surface 451a, and the extension line of exiting surface 451a is just vertical with the extension line of the first incidence surface 411a in this.In this embodiment, the 4th polarization device 451 comprises one the 4th polarization spectroscope 455, and it is a cuboid, has inclined-plane, one the 4th diagonal angle.The 4th polarization spectroscope 455 also has one the 4th polarization light splitting surface, is seated on the inclined-plane, aforementioned the 4th diagonal angle.Second reflection unit 453 comprises one second catoptron 457, and second reflection unit 453 is triangular prisms, and it has one second inclined-plane, and aforementioned second catoptron 457 just is seated on second inclined-plane.
In this embodiment, the first polarization spectroscope 415 of first polarization device 411 in first light guidance devices 41, the second polarization spectroscope 435 of second polarization device 431 in second light guidance devices 43 and the 4th polarization spectroscope 455 of the 4th polarization device 451 in the 3rd light guidance devices 45 are a MacNeille prism, this kind prism is that parallel polarization light is penetrated, and makes the reflection of vertical polarization light.Uniquely different be, in the 3rd light guidance devices 45, the 3rd polarization spectroscope 437 of the 3rd polarization device 433 is one Bai Shi-Fei Si nail (unit of length) (Bertrand-Feussner) prisms, and this kind prism then is to make the reflection of parallel polarization light, and vertical polarization light is penetrated.
First phase switching device 47 is located between first light guidance devices 41 and second light guidance devices 43, and it has one first switching state and one second switching state.One of them is in the switching phase state that changes the auroral poles direction for representative first phase switching device 47 first switching state and second switching state, and another person is in the non-switching phase state that does not change the auroral poles direction for representative first phase switching device 47.In this embodiment, first switching state is non-switching phase state, and second switching state is then for switching phase state.First switching state and second switching state are that the sequential according to first light 400, second light 420 and the 3rd light 440 provides.
Second phase switching device 49 is located between second light guidance devices 43 and the 3rd light guidance devices 45, and it has one the 3rd switching state and one the 4th switching state.One of them is in the switching phase state that changes the auroral poles direction for representative second phase switching device 49 the 3rd switching state and the 4th switching state, and another person is in the non-switching phase state that does not change the auroral poles direction for representative second phase switching device 49.In this embodiment, the 3rd switching state is non-switching phase state, and the 4th switching state is then for switching phase state.The 3rd switching state and the 4th switching state also provide according to the sequential of first light 400, second light 420 and the 3rd light 440 equally.
In this embodiment, first phase switching device 47 and/or second phase switching device 49 are phase switching delayers; And this phase switching delayer can be a liquid crystal layer, a ferroelectric liquid crystal layer, a Faraday rotator, a vigorous Kerr cell or a Kerr cell.
Shown in Fig. 4 A, after first light 400 that first light-emitting diode component 40 is produced enters first polarization device 411 of first light guidance devices 41 from the first incidence surface 411a, suitablely can be separated into one first level by the first polarization spectroscope 415 and penetrate light 400a and one first level reflected light 400b.More definite theory, it is a parallel polarization light that first level penetrates light 400a, first level reflected light 400b is a vertical polarization light.Phase switching device 47 was fitted and was in first switching state this moment first, that is non-switching phase state, thus the polarization state of first light 400 is changed, and after entering second light guidance devices 43, fit and can enter the 3rd light guidance devices 45; Simultaneously, the second changeable switch 49 is fitted and is in the 3rd switching state, that is non-switching phase state, and the polarization state of first light 400 is changed, and suitable can outwards the projection towards exiting surface 451a by the 3rd light guidance devices 45.
Say that more specifically first level penetrates after light 400a separates by the first polarization spectroscope 415, that is after separating by the MacNeille prism, under the state that does not switch phase place by first phase switching device 47 and enter second polarization device 431.Because it still is a parallel polarization light at this moment that first level penetrates light 400a, therefore can be by being the second polarization spectroscope 435 of MacNeille prism, and towards 45 projections of the 3rd light guidance devices, then under the state that does not switch phase place, pass through second phase switching device 49, and, enter the 4th polarization device 451 by second catoptron, 457 reflections that second reflection unit 453 is comprised.Because it still is a parallel polarization light at this moment that first level penetrates light 400a, can be the 4th polarization spectroscope 455 of MacNeille prism therefore, and outwards throws towards exiting surface 451a by passing in the 4th polarization device 451.
On the other hand, after first the first polarization spectroscope, 415 separation of level reflected light 400b by first polarization device 411, be first catoptron 417 reflection by first reflection unit 413, under the state that does not switch phase place by first phase switching device 47 and enter the 3rd polarization device 433.Because this moment, first level reflected light 400b still was a vertical polarization light, so can be by being the 3rd polarization spectroscope 437 of Bai Shi-Fei Si nail (unit of length) (Bertrand-Feussner) prism and throw towards the 3rd light guidance devices 45.Under the state that does not switch phase place, first level reflected light 400b is then by second phase switching device 49 and after entering the 4th polarization device 451, because first time level reflected light 400b still is a vertical polarization light at this moment, so can be reflected by the 4th polarization spectroscope 455 that is the MacNeille prism, and outwards throw towards exiting surface 451a.
Wherein, first level penetrates light 400a and first level reflected light 400b respectively by the 4th polarization spectroscope 455 and after being subjected to 455 reflections of the 4th polarization spectroscope, just can be combined into the first original light 400, outwards to throw towards exiting surface 451a.
Shown in Fig. 4 B, after second light 420 that second light-emitting diode component 42 is produced enters first polarization device 411 of first light guidance devices 41 from the second incidence surface 411b, suitablely can be separated into a second subprime by the first polarization spectroscope 415 that is the MacNeille prism and penetrate a light 420b and a second subprime reflected light 420a.It is a parallel polarization light that more definite theory, second subprime penetrate light 420b, and second subprime reflected light 400b is a vertical polarization light.Phase switching device 47 was fitted and was in second switching states this moment first, that is switched phase state, so the polarization state of second light 420 is changed, can enter in the 3rd light guidance devices 45 and fit; Simultaneously, the second changeable switch 49 is fitted and is in the 3rd switching state, that is non-switching phase state, and the polarization state of second light 420 is changed, and suitable can outwards the projection towards exiting surface 451a by the 3rd light guidance devices 45.
More specifically say, second subprime penetrates after light 420b separates by the first polarization spectroscope 415, that is after separating by the MacNeille prism, be first catoptron, 417 reflections by first reflection unit 413, by first phase switching device 47 and enter the 3rd polarization device 433.Because this moment, second subprime penetrated the switching that light 420b is subjected to first phase switching device 47, become a vertical polarization light and change, so can be by being the 3rd polarization spectroscope 437 of Bai Shi-Fei Si nail (unit of length) (Bertrand-Feussner) prism and throw towards the 3rd light guidance devices 45 by a parallel polarization light.By second phase switching device 49 and after entering the 4th polarization device 451, because this moment, second phase switching device 49 was to be in non-switching phase state, thereby second subprime penetrates the switching that light 420b is not subjected to second phase switching device 49, still be a vertical polarization light, so can be reflected by the 4th polarization spectroscope 455 that is the MacNeille prism, and outwards throw towards exiting surface 451a.
On the other hand, after second subprime reflected light 420a is separated by the first polarization spectroscope 415 that is first polarization device 411 of MacNeille prism, by first phase switching device 47 and enter second polarization device 431.Because this moment, second subprime reflected light 420a was subjected to the switching of first phase switching device 47, become a parallel polarization light and change, so can be by being the second polarization spectroscope 437 of MacNeille prism and throw towards the 3rd light guidance devices 45 by a vertical polarization light.Reflecting by second phase switching device 49 and by second catoptron 457 in second reflection unit 453, after entering the 4th polarization device 451, because this moment, second phase switching device 49 was to be in non-switching phase state, thereby second subprime reflected light 420a is not subjected to the switching of second phase switching device 49, still be a parallel polarization light, so can pass is the 4th polarization spectroscope 455 of MacNeille prism, and outwards throws towards exiting surface 451a.
Wherein, second subprime penetrates light 420b and second subprime reflected light 420a and is subjected to respectively being the 4th polarization spectroscope 455 reflections of MacNeille prism and penetrating by behind the 4th polarization spectroscope 455, just can be combined into the second original light 420, outwards to throw towards exiting surface 451a.
Shown in Fig. 4 C, after the 3rd light 440 that the 3rd light-emitting diode component 44 is produced enters second polarization device 431 of second light guidance devices 43 from the 3rd incidence surface 433a, suitable can by the second polarization spectroscope 435 that is the MacNeille prism be separated into one for the third time level penetrate light 440b and level reflected light 440a for the third time.More definite theory, to penetrate light 440b be a parallel polarization light to level for the third time, a level reflected light 440a is a vertical polarization light for the third time.Second phase switching device, 49 suitable the 4th switching states that are in, that is switch phase state, the polarization state of the 3rd light 440 is changed, and after entering the 3rd light guidance devices 45, in suitable can outwards the projection towards exiting surface 451a; Simultaneously, the 3rd light 440 is not influenced by the state of first phase switching device 47, and in other words, first phase switching device 47 can be at this moment switches phase state or non-switching phase state.
More specifically say, level penetrates light 440b by after being the second polarization spectroscope, 435 separation of MacNeille prism for the third time, because be a horizontal polarization light and be subjected to the 3rd polarization spectroscope 437 reflection of the 3rd polarization device 433, that is be subjected to Bai Shi-Fei Si nail (unit of length) (Bertrand-Feussner) prism and reflect, and towards 45 projections of the 3rd light guidance devices.By second phase switching device 49 time, owing to be subjected to being in second phase switching device, 49 switchings of the 4th switching state, level penetrates light 440b and changes a vertical polarization light into by a parallel polarization light for the third time, so after entering the 3rd light guidance devices 45, the 4th polarization spectroscope 455 reflections by the 4th polarization device 451, that is by the MacNeille prismatic reflection, and outwards throw towards exiting surface 451a.
After level reflected light 440a is separated by the second polarization spectroscope 435 that is the MacNeille prism for the third time, be towards 45 projections of the 3rd light guidance devices.By second phase switching device 49 time, second phase switching device 49 that is subjected to the 4th switching state is switched, level reflected light 440a changes a parallel polarization light into by a vertical polarization light for the third time, by second catoptron, 457 reflections of second reflection unit 453, enter the 4th polarization device 451 again.Because this moment, level reflected light 440a was a parallel polarization light for the third time,, and outwards throw towards exiting surface 451a so penetrable mistake is the 4th a polarization spectroscope 455 of MacNeille prism.Wherein, level penetrates light 440b and is subjected to 455 reflections of the 4th polarization spectroscope respectively and by behind the 4th polarization spectroscope 455, just can be combined into the 3rd original light 440, outwards to throw towards exiting surface 451a with a level reflected light 440a for the third time for the third time.
Similarly, the light source switching mechanism 4 of present embodiment also can be applicable to an optical projection system, and this optical projection system comprises one first light-emitting diode component, one second light-emitting diode component, one the 3rd light-emitting diode component, a prism, a digital micro-mirror device and an imaging len.Be familiar with this operator and can spread to its operation principles and inner member configuration easily, so do not give unnecessary details in addition in this.
The present invention is not limited to the combination of the light guidance devices and the phase switching device of given number in the various embodiments described above, in addition, above each element of carrying can replace by other element that possesses identical function, should spread to other enforcement aspect of the present invention easily so be familiar with this operator.
For example, if the characteristic of all polarization devices of the light source switching mechanism described in the various embodiments described above is inverted, also soon be that the MacNeille prism (allows parallel polarization light penetrate originally, and make vertical polarization light reflection) polarization device be replaced as Bai Shi-Fei Si nail (unit of length) (Bertrand-Feussner) prism and (allow the reflection of parallel polarization light, and vertical polarization light is penetrated) polarization device, the polarization device that will be Bai Shi-Fei Si nail (unit of length) (Bertrand-Feussner) prism originally is replaced into the polarization device of MacNeille prism, this moment, all the secondary light that penetrate described in each embodiment were all just in time opposite with the polarization direction of secondary reflection light in all optical paths, that is vertical polarization light and parallel polarization light are replaced into parallel polarization light and vertical polarization light respectively mutually.At this moment, if all phase place switching device shifters are kept as the switch mode described in the various embodiments described above, the then secondary light that penetrates is still fitted and can be reached the purpose of toggle lights along identical optical path with secondary reflection light again.Its detailed optical path and switching principle similar in appearance to the various embodiments described above, are not therefore given unnecessary details at this.
By light source switching mechanism of the present invention, the light source configuration in the optical projection system has more elasticity.By turning to of light source switching mechanism, just the light that light source produced that is arranged at different directions, position can be penetrated by same plane.Because therefore providing by electric signal control of phase switching device and light source not only can react rapidly and with matching, situations such as the wearing and tearing generation when more not having error in the making or use.This light source switching mechanism can make optical projection system not need to use mirror wheel as prior art, and luminous flux is more continuous, the light source switch speed is faster, dwindle overall dimensions and simplify arrangements of components and can make.In addition, this light source switching mechanism also can be used as light accumulation column, under the situation that does not increase etendue, still brightness can be improved several times.
The foregoing description only is illustrative principle of the present invention and effect thereof, and explains technical characterictic of the present invention, but not is used to limit protection category of the present invention.Any person skilled in the art scholar all can be under the situation of know-why of the present invention and spirit, can unlabored change or the arrangement of the isotropism scope that all belongs to the present invention and advocated.Therefore, the application's claim institute restricted portion is listed as described later for the scope of the present invention.
Claims (26)
1. light source switching mechanism that is used for an optical projection system, but the suitable alternative expression of this optical projection system one first light and one second light are provided, this light source switching mechanism comprises:
One first light guidance devices has one first incidence surface and is one second parallel incidence surface with this first incidence surface is non-;
One second light guidance devices has an exiting surface; And
One phase switching device is located between this first light guidance devices and this second light guidance devices, and it has one first switching state and one second switching state;
Wherein when this first light when this first incidence surface enters this first light guidance devices, this phase switching device is suitable to be in this first switching state, make this first light enter this second light guidance devices after, suitable can outwards the projection towards this exiting surface; When this second light when this second incidence surface enters this first light guidance devices, this phase switching device is suitable to be in this second switching state, make this second light enter this second light guidance devices after, suitable can outwards the projection towards this exiting surface.
2. light source switching mechanism according to claim 1 is characterized in that: this first light guidance devices comprises:
One first polarization device and one and first reflection unit of the adjacent setting of this first polarization device, this first polarization device has this first incidence surface and this second incidence surface;
This second light guidance devices comprises:
One second polarization device and one and second reflection unit of the adjacent setting of this second polarization device, this second polarization device defines this exiting surface;
When this first light after this first incidence surface enters this first polarization device, suitable be separable into one first level and penetrate light and one first level reflected light, wherein this first level penetrates light by this phase switching device, and the reflection by this second reflection unit, after penetrating this second polarization device, outwards throw towards this exiting surface; This first level reflected light, outwards throws towards this exiting surface by this second polarization device reflection by this phase switching device from the reflection of this first polarization device by this first reflection unit again;
When this second light from this second incidence surface, after entering this first polarization device, suitable be separable into a second subprime and penetrate a light and a second subprime reflected light, wherein this second subprime penetrates the reflection of light by this first reflection unit, by this phase switching device, and outwards throw towards this exiting surface by the reflection of this second polarization device; This second subprime reflected light from this first polarization device by this phase switching device, again by the reflection of this second reflection unit, penetrate this second polarization device after, outwards throw towards this exiting surface.
3. light source switching mechanism according to claim 2 is characterized in that:
This first polarization device and this second polarization device are suitable can to reflect vertical polarization light, and allows parallel polarization light to penetrate.
4. light source switching mechanism according to claim 2 is characterized in that:
This first polarization device comprises one first polarization spectroscope;
This first reflection unit comprises one first catoptron;
This second polarization device comprises one second polarization spectroscope;
This second reflection unit comprises one second catoptron;
Wherein this first level penetrates light and this first level reflected light, being separated by this first polarization spectroscope, and penetrate light by this first level of this phase switching device, is to reflect by this second catoptron, and after penetrating this second polarization spectroscope, outwards throw towards this exiting surface; By this first level reflected light of this phase switching device, be by after the spectroscopical reflection of this second polarization, fit and outwards throw towards this exiting surface;
Wherein this second subprime penetrates light and second subprime reflected light, separated by this first polarization spectroscope, wherein this second subprime penetrates the reflection of only passing through this first catoptron, and is suitable by this phase switching device, and reflects by this second polarization spectroscope; This second subprime reflected light is from this first polarization spectroscope reflection, and is suitable by this phase switching device, again by the reflection of this second catoptron, penetrate this second polarization spectroscope after, outwards throw towards this exiting surface.
5. light source switching mechanism according to claim 4, it is characterized in that this first polarization spectroscope and this second polarization spectroscope, be a cuboid, it has inclined-plane, one first diagonal angle and inclined-plane, one second diagonal angle respectively, this the first polarization spectroscope and the second polarization spectroscope also have one first polarization light splitting surface and one second polarization light splitting surface respectively, and this first polarization light splitting surface and this second polarization light splitting surface are seated respectively on this inclined-plane, first diagonal angle and this inclined-plane, second diagonal angle.
6. light source switching mechanism according to claim 4, it is characterized in that this first reflection unit and this second reflection unit are a triangular prism, it has one first inclined-plane and one second inclined-plane respectively, and this first catoptron and this second catoptron are to be seated respectively on this first inclined-plane and this second inclined-plane.
7. light source switching mechanism according to claim 2 is characterized in that this first level penetrates light and this second subprime penetrates an only parallel polarization light, and this first level reflected light and this second subprime reflected light are a vertical polarization light.
8. light source switching mechanism according to claim 1, one of them is the switching phase state to it is characterized in that this first switching state and this second switching state, another person is non-switching phase state.
9. light source switching mechanism according to claim 1, it is characterized in that this first light and this second light are to be provided by one first light-emitting diode component and one second light-emitting diode component respectively, respectively this light-emitting diode component has a red light emitting diodes, a blue LED and a green LED.
10. light source switching mechanism according to claim 1 is characterized in that this first light and this second light are to provide with complying with a sequential alternative expression.
11. light source switching mechanism according to claim 10 is characterized in that this first switching state and this second switching state are to provide according to this sequential.
12. light source switching mechanism according to claim 1 is characterized in that this phase switching device is a phase switching delayer.
13. light source switching mechanism according to claim 12, it is characterized in that this phase switching delayer be a liquid crystal layer, a Faraday rotator, a vigorous Kerr cell and a Kerr cell one of them.
14. light source switching mechanism according to claim 1 is characterized in that this light source switching mechanism is one-body molded.
15. a light source switching mechanism that is used for an optical projection system, but this optical projection system provides one first light, one second light and one the 3rd light with fitting alternative expression, and this light source switching mechanism comprises:
One first light guidance devices has one first incidence surface and is one second parallel incidence surface with this first incidence surface is non-;
One second light guidance devices has that one of them non-ly is one the 3rd parallel incidence surface with this first incidence surface and this second incidence surface;
One the 3rd light guidance devices has an exiting surface;
One first phase switching device is located between this first light guidance devices and this second light guidance devices, and it has one first switching state and one second switching state; And
One second phase switching device is located between this second light guidance devices and the 3rd light guidance devices, and it has one the 3rd switching state and one the 4th switching state;
Wherein when this first light when this first incidence surface enters this first light guidance devices, suitable this first switching state that is in of this first phase switching device, this first light is fitted can be entered in the 3rd light guidance devices, this second phase switching device was fitted and was in the 3rd switching state this moment, and this first light is fitted can outwards be throwed towards this exiting surface;
Wherein when this second light when this second incidence surface enters this first light guidance devices, suitable this second switching state that is in of this first phase switching device, this second light is fitted can be entered in the 3rd light guidance devices, this second phase switching device was fitted and was in the 3rd switching state this moment, and this second light is fitted can outwards be throwed towards this exiting surface;
Wherein when the 3rd light when the 3rd incidence surface enters this second light guidance devices, this second phase switching device is suitable to be in the 4th switching state, makes that the 3rd light is suitable can outwards to be throwed towards this exiting surface.
16. light source switching mechanism according to claim 15 is characterized in that:
This first light guidance devices comprises:
One first polarization device and one and first reflection unit of the adjacent setting of this first polarization device, this first polarization device defines this first incidence surface and this second incidence surface;
This second light guidance devices comprises:
One second polarization device and one and the 3rd polarization device of the adjacent setting of this second polarization device, this second polarization device defines the 3rd incidence surface;
The 3rd light guidance devices comprises:
Second reflection unit of one the 4th polarization device and the one and the 4th adjacent setting of polarization device, the 4th polarization device defines this exiting surface;
When this first light from this first incidence surface, after entering this first polarization device, suitable be separable into one first level and penetrate light and one first level reflected light, wherein this first level penetrates and only penetrates this first phase switching device, this second polarization device and this second phase switching device, and the reflection by this second reflection unit, after penetrating the 4th polarization device, outwards throw towards this exiting surface; This first level reflected light is from the reflection of this first polarization device by this first reflection unit, penetrate this first phase switching device, the 3rd polarization device and this second phase switching device, outwards throw towards this exiting surface by the reflection of the 4th polarization device again;
When this second light from this second incidence surface, after entering this first polarization device, suitable be separable into a second subprime and penetrate a light and a second subprime reflected light, wherein this second subprime penetrates the reflection of only passing through this first reflection unit, penetrate this first phase switching device, the 3rd polarization device and this second phase switching device, and outwards throw towards this exiting surface by the reflection of the 4th polarization device; This second subprime reflected light is to penetrate this first phase switching device, this second polarization device and this second phase switching device from this first polarization device, pass through the reflection of this second reflection unit again, after penetrating the 4th polarization device, outwards throw towards this exiting surface;
When the 3rd light from the 3rd incidence surface, after entering this second polarization device, suitable be separable into one for the third time level penetrate light and one level reflected light for the third time, wherein this for the third time level penetrate only by the reflection of the 3rd polarization device, penetrate this second phase switching device, and outwards throw towards this exiting surface by the reflection of the 4th polarization device; This for the third time a level reflected light be to penetrate this second phase switching device from this second polarization device, the reflection by this second reflection unit again, penetrate the 4th polarization device after, outwards throw towards this exiting surface.
17. light source switching mechanism according to claim 16 is characterized in that:
This first polarization device, this second polarization device and the 4th polarization device are suitable can to reflect vertical polarization light, and allows parallel polarization light to penetrate; And
The 3rd polarization device is suitable can to reflect parallel polarization light, and allows vertical polarization light to penetrate.
18. light source switching mechanism according to claim 16 is characterized in that:
This first polarization device comprises one first polarization spectroscope;
This first reflection unit comprises one first catoptron;
This second polarization device comprises one second polarization spectroscope;
The 3rd polarization device comprises one the 3rd polarization spectroscope;
The 4th polarization device comprises one the 4th polarization spectroscope;
This second reflection unit comprises one second catoptron;
Wherein this first level penetrates light and this first level reflected light, separated by this first polarization spectroscope, wherein this first level by this first phase switching device, this second polarization spectroscope and this second phase switching device penetrates light, be to reflect by this second catoptron, and after penetrating the 4th polarization spectroscope, outwards throw towards this exiting surface; By this first level reflected light of this first phase switching device, the 3rd polarization spectroscope and this second phase switching device, be by after the spectroscopical reflection of the 4th polarization, fit and outwards throw towards this exiting surface;
Wherein this second subprime penetrates light and second subprime reflected light, separated by this first polarization spectroscope, wherein this second subprime penetrates the reflection of only passing through this first catoptron, suitable by this first phase switching device, the 3rd polarization spectroscope and this second phase switching device, and reflect by the 4th polarization spectroscope of the 4th polarization device; This second subprime reflected light is from this first polarization spectroscope reflection, suitable by this first phase switching device, this second polarization spectroscope and this second phase switching device, reflection by this second catoptron again, penetrate the 4th polarization spectroscope after, outwards throw towards this exiting surface;
Wherein this for the third time the level penetrate light and for the third time the level reflected light, separated by this second polarization spectroscope, wherein this for the third time level penetrate only by the spectroscopical reflection of the 3rd polarization, suitable by this second phase switching device, by after the spectroscopical reflection of the 4th polarization, outwards throw again towards this exiting surface; This for the third time a level reflected light be from this second polarization spectroscope reflection, suitable by this second phase switching device, again by the reflection of this second catoptron, penetrate the 4th polarization spectroscope after, outwards throw towards this exiting surface.
19. light source switching mechanism according to claim 18, it is characterized in that this first polarization spectroscope, this second polarization spectroscope, the 3rd polarization spectroscope and the 4th polarization spectroscope, be a cuboid, it has inclined-plane, one first diagonal angle respectively, inclined-plane, one second diagonal angle, inclined-plane, one the 3rd diagonal angle and inclined-plane, one the 4th diagonal angle, this first polarization spectroscope, this second polarization spectroscope, the 3rd polarization spectroscope and the 4th polarization spectroscope also have one first polarization light splitting surface respectively, one second polarization light splitting surface, one the 3rd polarization light splitting surface and one the 4th polarization light splitting surface, this first polarization light splitting surface, this second polarization light splitting surface, the 3rd polarization light splitting surface and the 4th polarization light splitting surface are seated this inclined-plane, first diagonal angle respectively, this inclined-plane, second diagonal angle, on inclined-plane, the 3rd diagonal angle and the inclined-plane, the 4th diagonal angle.
20. light source switching mechanism according to claim 18, it is characterized in that this first reflection unit and this second reflection unit are a triangular prism, it has one first inclined-plane and one second inclined-plane respectively, and this first catoptron and this second catoptron are seated respectively on this first inclined-plane and this second inclined-plane.
21. light source switching mechanism according to claim 16, it is characterized in that this first level penetrate light, this second subprime penetrate light and this for the third time level penetrate an only parallel polarization light, and this first level reflected light, this second subprime reflected light with this for the third time a grade reflected light be a vertical polarization light.
22. light source switching mechanism according to claim 15, one of them is the switching phase state to it is characterized in that this first switching state and this second switching state, another person is non-switching phase state, and one of them is the switching phase state the 3rd switching state and the 4th switching state, and another person is non-switching phase state.
23. light source switching mechanism according to claim 15, it is characterized in that this first light, this second light and the 3rd light are to be provided by one first light-emitting diode component, one second light-emitting diode component and one the 3rd light-emitting diode component respectively, respectively this light-emitting diode component has a red light emitting diodes, a blue LED and a green LED.
24. light source switching mechanism according to claim 15 is characterized in that this first light, this second light and the 3rd light are to provide with complying with a sequential alternative expression.
25. light source switching mechanism according to claim 24 is characterized in that this first switching state, this second switching state and the 3rd switching state are to provide according to this sequential.
26. light source switching mechanism according to claim 15 is characterized in that this second light guidance devices comprises a MacNeille prism and one Bai Shi-Feussner prism.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102138824A CN101470275B (en) | 2007-12-26 | 2008-09-10 | Light source switching mechanism used for projection system |
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| CN200710305483.6 | 2007-12-26 | ||
| CN200710305483 | 2007-12-26 | ||
| CN2008102138824A CN101470275B (en) | 2007-12-26 | 2008-09-10 | Light source switching mechanism used for projection system |
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| CN101470275B true CN101470275B (en) | 2010-12-08 |
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| CN108805819B (en) * | 2018-03-02 | 2019-04-23 | 安徽优品智能科技有限公司 | Image display mode automatic switching method |
| CN111751973A (en) * | 2020-07-23 | 2020-10-09 | 合肥工业大学 | Double-light-source multi-dimensional adjustment high-resolution microscopic imaging device |
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