CN208270921U - Light harvesting column system - Google Patents
Light harvesting column system Download PDFInfo
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- CN208270921U CN208270921U CN201820632137.2U CN201820632137U CN208270921U CN 208270921 U CN208270921 U CN 208270921U CN 201820632137 U CN201820632137 U CN 201820632137U CN 208270921 U CN208270921 U CN 208270921U
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Abstract
The utility model embodiment is related to a kind of light harvesting column system, the first cylindrical lenses, on the propagation path of illuminating bundle；Second cylindrical lenses, on the propagation path for the illuminating bundle being emitted from the first cylindrical lenses, the first cylindrical lenses are between light source and the second cylindrical lenses；The focal length of first cylindrical lenses is not equal to the focal length for stating the second cylindrical lenses；First cylindrical lenses and the second cylindrical lenses are used to illuminating bundle pooling directional light, and form oval light field；On the propagation path for collecting the illuminating bundle that light beam is set to the outgoing of the second cylindrical lenses, for the illuminating bundle that there is uniform strength to be distributed will to be formed from the illuminating bundle of collection light beam light inputting end incidence, go out the reflecting surface where the illuminating bundle of the long side outgoing at light end from the long side incidence of collection light beam light inputting end, from the collection light beam, with the short side from the collection light beam light inputting end it is incident, from the reflecting surface where the illuminating bundle that the short side that the collection light beam goes out light end is emitted, optically coated incident angle is not identical.
Description
Technical field
The utility model relates to light harvesting column technology fields, more particularly to a kind of light harvesting column system.
Background technique
Traditional projection arrangement typically is provided with collection light beam.Collection light beam has corresponding light inputting end and light end out, light inputting end
Respectively be in rectangle with light end out, light inputting end tool there are two long side and two short sides, out light end also have there are two long side and two short
Side, it is overlapping with stray light to improve light utilization to reduce image strip in order to obtain oval light field at projection lens aperture
Rate.Common practice is the short side for allowing the long side of collection light beam light inputting end to be parallel to out light end, and the short side of light inputting end goes out light end in parallel
Long side, in this way, the illuminating bundle of the short side of collection light beam light inputting end is emitted from the long side at light end out, light angle becomes smaller, light harvesting
The illuminating bundle of the long side of column light inputting end is emitted from the short side at light end out, and light angle becomes larger, and is thusly-formed oval light field.
But the illuminating bundle for collecting the long side of light beam light inputting end is emitted from the short side at light end out, collection light beam internal light is incident
Angle can become larger, and the illuminating bundle for collecting the short side of light beam light inputting end is emitted from the long side at light end out, collect light beam internal light
Incident angle can gradually become smaller.Because the incidence angle of the illuminating bundle inside collection light beam is variation, inside collection light beam
Each reflecting surface will carry out different Coating optimizations for different incidence angles, need to plate reflecting surface using different media
Film, or even need to do multicoating, to improve reflectivity, operation difficulty is big, more complicated.If Coating optimization is done not
It is good, illuminating bundle just as can be bad in collection light beam internal reflection and lead to light loss, light utilization ratio can be reduced.
Utility model content
Based on this, it is necessary to provide a kind of light harvesting column system.
A kind of light harvesting column system, comprising:
Light source, including be rectangular light end out, for providing illuminating bundle；
First cylindrical lenses, on the propagation path of the illuminating bundle；
Second cylindrical lenses, on the propagation path for the illuminating bundle being emitted from first cylindrical lenses, described
One cylindrical lenses are between the light source and second cylindrical lenses；The focal length of first cylindrical lenses is not equal to stating the
The focal length of two cylindrical lenses；First cylindrical lenses and the second cylindrical lenses are for pooling in parallel the illuminating bundle
Light, and form oval light field；
Collect light beam, including for rectangular light inputting end and be rectangular light end out, goes out set on second cylindrical lenses
On the propagation path for the illuminating bundle penetrated, for will be formed from the illuminating bundle of collection light beam light inputting end incidence with uniform strength point
Cloth, go out light from collection light beam and bring out the illuminating bundle penetrated, the light source goes out the long side at light end and the length of the collection light beam light inputting end
Side, the long side for going out light end are parallel, and the light source goes out the short side at light end and the short side of the collection light beam light inputting end, the short side for going out light end
In parallel；Wherein, the first inner wall of the collection light beam and the second inner wall are equipped with optical coating, on first inner wall
Optically coated incident angle and the optically coated incident angle on second inner wall be not identical, and the collection light beam enters light
Two inner walls where the long side at end and the collection light beam go out the long side at light end are first inner wall, the collection light beam
Two inner walls where the short side of light inputting end and the collection light beam go out the short side at light end are second inner wall；And
Digital Micromirror Device, for illuminating bundle to be converted to image strip, by projection lens by the image strip
It is projected to screen.
Above-mentioned light harvesting column system, light source go out that the long side at light end and the long side of collection light beam light inputting end, to go out the long side at light end parallel,
The light source goes out that the short side at light end and the short side of the collection light beam light inputting end, to go out the short side at light end parallel, such illuminating bundle from
It is incident to collect light beam light inputting end long side, then it is corresponding go out the outgoing of light end long side from collection light beam, illuminating bundle is from collection light beam light inputting end short side
Incidence, then correspond to from collection light beam and go out the outgoing of light end short side, the collection same reflecting surface internal light incident angle of light beam is relatively simple,
There is no need to carry out different Coating optimizations for the same reflecting surface, coating operation is simple.And have the first cylindrical lenses
With the second cylindrical lenses, the focal length of the first cylindrical lenses can form asymmetrical angle spatial distribution less than the second cylindrical lenses
Light out will form oval light field in this way, so that image strip is also elliptical in the light spot shape of projection lens, it is possible to reduce shadow
As light beam is overlapping with stray light, light loss is reduced to improve light utilization efficiency.For entering from the long side of the collection light beam light inputting end
It penetrates, from the reflecting surface where the illuminating bundle that the long side that the collection light beam goes out light end is emitted, and from the collection light beam light inputting end
Short side it is incident, from the reflecting surface where the illuminating bundle that the short side that the collection light beam goes out light end is emitted, optically coated incidence
Angle is not identical, is also beneficial to the formation of oval light field, improves light utilization efficiency.
The Digital Micromirror Device is the first Digital Micromirror Device in one of the embodiments,；First number is micro-
Mirror device include be rectangular active region, active region is equipped with square micro mirror, the diagonal line of the rotary shaft of micro mirror along micro mirror
Direction extends, and parallel with active region short side, and the incident direction of illuminating bundle is vertical with active region short side direction；In open state
When micro mirror and light beam incident direction form default angle, the opposite direction shape of micro mirror when in off status and light beam incident direction
At default angle；
First inner wall is equipped with the optical coating of 45 degree of incidence angles, and first inner wall is equipped with 15 degree and enters
The optical coating of firing angle.
The Digital Micromirror Device is the second Digital Micromirror Device in one of the embodiments,；Second number is micro-
Mirror device include be rectangular active region, the active region is equipped with the micro mirror that is square, and illuminating bundle is from the active
First long side in area enters, and incident direction is vertical with first long side, in micro mirror close first long side and with it is described
Landing side when be micro mirror beyond the first long side is parallel being open state, landing side when micro mirror is off status and micro mirror is open
The landing side of state is adjacent, and illuminating bundle incidence most off status when micro mirror, the light beam of reflection is finally from close to micro mirror
The side outgoing on landing side when for off status, and the landing side when optical path of the reflected beams and micro mirror are off status forms and presss from both sides
Angle；
First inner wall is equipped with the optical coating of 15 degree of incidence angles；Second inner wall is equipped with 45 degree and enters
The optical coating of firing angle.
The long side of the light source extends in a first direction in one of the embodiments, and the short side of the light source is along second
Horizontal direction extends, and the straight edge line of the cylinder of first cylindrical lens extends in a first direction, the coke of first cylindrical lenses
The focal lengths of the second cylindrical lenses is stated away from being less than, the straight edge line of the cylinder of second cylindrical lens extends in a second direction, and described the
The light beam for depositing component in a first direction that one cylindrical lenses are used to provide the light source pools directional light, second column
The light beam for depositing component in a second direction that shape lens are used to provide the light source pools directional light, forms long axis direction and exists
The oval light field of first direction.
The long side of the light source extends in a first direction in one of the embodiments, and the short side of the light source is along second
Direction extends, and the straight edge line of the cylinder of first cylindrical lens extends in a second direction, and the focal length of first cylindrical lenses is small
It is extended in a first direction in the straight edge line of the focal length for stating the second cylindrical lenses, the cylinder of second cylindrical lens, first column
The light beam for depositing component in a second direction that shape lens are used to provide the light source pools directional light, and second column is saturating
The light beam for depositing component in a first direction that mirror is used to provide the light source pools directional light, forms long axis direction second
The oval light field in direction.
The light harvesting column system further includes setting in second cylindrical lenses and described in one of the embodiments,
Collect the collective optics between light beam, and is set between the collection light beam and the Digital Micromirror Device including at least one
Lens, the collective optics are located on the propagation path of the illuminating bundle of second cylindrical lenses outgoing, the collection light beam position
In on the propagation path of the illuminating bundle of the light beam being emitted from the lens；The collective optics are used for will be from described second
The illuminating bundle of cylindrical lenses outgoing converges to the collection light beam, and the lens are located at the illuminating bundle of the collection light beam outgoing
Propagation path on, the lens are used to converge light beam that the collection light beam issues to the Digital Micromirror Device.
The light collection system further includes total internal reflection prism in one of the embodiments, the total internal reflection prism packet
The right-angle reflecting prism that cross section is right angled triangle and the acute angle deflection prism that cross section is acute triangle are included, is set to described
Collect between light beam sum number word micro mirror element, and be located at from the propagation path for the light beam that the collection light beam is emitted, being used for will be from institute
The illuminating bundle for stating collection light beam outgoing is all-trans and is incident upon the Digital Micromirror Device, then will issue from the Digital Micromirror Device
Image strip converges to the projection lens.
The Digital Micromirror Device is the first Digital Micromirror Device in one of the embodiments, and first number is micro-
Mirror device include be rectangular active region, active region is equipped with square micro mirror, the diagonal line of the rotary shaft of micro mirror along micro mirror
Direction extends, and parallel with active region short side, and the incident direction of illuminating bundle is vertical with active region short side direction；In open state
When micro mirror and light beam incident direction form default angle, the opposite direction shape of micro mirror when in off status and light beam incident direction
At default angle；
It is parallel that the short side of the first Digital Micromirror Device active region and the light source go out light end short side, the total internal reflection
A right-angle side and light source for the right-angle reflecting prism of prism goes out light and holds row level with both hands, the right-angle reflecting prism of the total internal reflection prism
Another right-angle side is parallel with the active region of first Digital Micromirror Device, the image light of the first Digital Micromirror Device outgoing
Beam is to converge to projection lens through acute angle deflection prism.
The Digital Micromirror Device is the second Digital Micromirror Device in one of the embodiments, and second number is micro-
Mirror device include be rectangular active region, the active region is equipped with the micro mirror that is square, and illuminating bundle is from the active
First long side in area enters, and incident direction is vertical with first long side, in micro mirror close first long side and with it is described
Landing side when be micro mirror beyond the first long side is parallel being open state, landing side when micro mirror is off status and micro mirror is open
The landing side of state is adjacent, and illuminating bundle incidence most off status when micro mirror, the light beam of reflection is finally from close to micro mirror
The side outgoing on landing side when for off status, and the landing side when optical path of the reflected beams and micro mirror are off status forms and presss from both sides
Angle；
The illuminating bundle being emitted from the collection light beam is entered from the acute angle deflection prism, is then reflected, from straight
Corner reflection prism incidence to second Digital Micromirror Device, the active region and right angle of second Digital Micromirror Device reflects rib
One right-angle side of mirror is parallel, and the image strip of the second Digital Micromirror Device outgoing is finally through the right-angle reflecting prism
Another right-angle side converges to projection lens.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the light harvesting column system in one embodiment；
Fig. 2 is the structural schematic diagram of the collection light beam in one embodiment；
Fig. 3 is the schematic diagram of the cylindrical lenses in one embodiment；
Fig. 4 is the schematic diagram of the cylindrical lenses convergence light in one embodiment；
Fig. 5 is the schematic diagram of the upright oval light field in one embodiment；
Fig. 6 is the structural schematic diagram of the light harvesting column system in another embodiment；
Fig. 7 is the schematic diagram of the horizontal vertical oval light field in one embodiment；
Fig. 8 be one embodiment in digital micromirror elements open state, off status, parastate schematic diagram；
Fig. 9 is the schematic diagram of the first Digital Micromirror Device in one embodiment；
Figure 10 is the schematic diagram of the second Digital Micromirror Device in one embodiment；
Figure 11 is the schematic diagram that opal baffle blocks stray light in one embodiment；
Figure 12 is the schematic diagram that opal baffle blocks stray light in another embodiment.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
Fig. 1 is the structural schematic diagram of light harvesting column system in one embodiment.Light harvesting column system in Fig. 1, comprising: light source
10, the first cylindrical lenses 20, the second cylindrical lenses 30, collection light beam 40 and Digital Micromirror Device 50.Light source is for providing illumination
Light beam, the first cylindrical lenses 20 are set on the propagation path of illuminating bundle, and the second cylindrical lenses 30 are set to from the first cylindrical lenses
On the propagation path of the illuminating bundle of 20 outgoing, the first cylindrical lenses 20 are located between light source and the second cylindrical lenses 30, and first
The focal length of cylindrical lenses 20 is less than the focal length for stating the second cylindrical lenses 30, and the first cylindrical lenses 20 and the second cylindrical lenses 30 are used
In illuminating bundle is pooled directional light, and form oval light field；Collection light beam 40 light end including light inputting end and out, as shown in Fig. 2,
The light inputting end for collecting light beam 40 includes two long sides and two short sides, and the light end that goes out of collection light beam 40 includes two long sides and two short
Side, collection light beam 40 are set on the propagation path of the illuminating bundle of the second cylindrical lenses 30 outgoing, for that will enter light from collection light beam 40
Holding the illuminating bundle of incidence to be formed, that there is uniform strength to be distributed, from light beam 40 is collected, light brings out the illuminating bundle penetrated, light source 10 out
Out the long side at light end with collection light beam light inputting end long side, go out the long side at light end it is parallel, light source 10 go out light end short side and collection light beam
The short side of 40 light inputting ends, the short side for going out light end are parallel；And Digital Micromirror Device 50, for illuminating bundle to be converted to image light
Image strip is projected to screen by projection lens by beam.
Wherein, for light source 10, light source has light end out, and for issuing illuminating bundle, light end is a rectangle out, can
It is arranged by light emitting diode, light end includes two long sides and two short sides out.
For the first cylindrical lenses 20 and the second cylindrical lenses 30, as shown in figure 3, cylindrical lenses only have in the direction y
Curvature, thus the light beam of the side's y upward component can only be become to directional light, the light beam of the side's x upward component is then directly it to be allowed to pass through.
For example, as shown in figure 4, the light beam of component on light source short side direction is pooled directional light by cylindrical lenses, in light source longitudinal direction
The light beam of component then allows it to pass through.
Wherein, in one embodiment, the focal length of the first cylindrical lenses 20 is smaller than the focal length of the second cylindrical lenses 30,
The long side that light source 10 goes out light end extends in a first direction, and the short side that light source 10 goes out light end extends in a second direction, first direction
It is mutually perpendicular to second direction.To form oval light field, the first cylindrical lenses 20 and the second cylindrical lenses 30 will have a positioning
Set relationship.First cylindrical lenses 20 and the second cylindrical lenses 30 are at least one of following two positional relationship, below
Using first direction as vertical direction, second direction be in the horizontal direction for be illustrated:
As shown in Figure 1, the long side of light source 10 is in vertical direction, the short side of light source 10 in the horizontal direction, the first column
Lens 20 and the second cylindrical lenses 30 are in first position relationship: the straight edge line of 20 cylinder of the first cylindrical lens is in vertical direction
On, in the horizontal direction, the first cylindrical lenses 20 are for mentioning light source 10 for the straight edge line direction of 30 cylinder of the second cylindrical lens
The illuminating bundle for depositing component in vertical direction supplied pools directional light, and the second cylindrical lenses 30 are for providing light source 10
The illuminating bundle for depositing component in the horizontal direction pool directional light, form long axis direction in the upright ellipse of vertical direction
Light field (as shown in Figure 5).
The present embodiment, the first cylindrical lenses 20 have curvature at 10 longitudinal direction of light source (in Fig. 1 vertically), for light source is long
The light of component pools directional light on edge direction, and the light of component then allows it to pass through on light source short side direction.First cylindrical lenses 20
The second cylindrical lenses 30 are placed again after this cylindrical lenses, and the second cylindrical lenses 30 only have curvature in light source short side direction, will
The light of component pools directional light on light source short side direction (in Fig. 1 laterally), due to the light of component in script light source longitudinal direction
It has been parallel light, can have directly passed through the second cylindrical lenses 30, and because the first cylindrical lenses 20 are saturating less than the second column
The focal length of mirror 30, therefore the illuminating bundle that light source 10 can be allowed to provide forms upright oval light field (as shown in Figure 5).
In one embodiment, as shown in fig. 6, the long side of light source 10 in vertical direction, the short side of light source 10 is in water
Square upwards, the first cylindrical lenses 20 and the second cylindrical lenses 30 are in second position relationship: the cylinder of the first cylindrical lens 20
Straight edge line in the horizontal direction, the straight edge line of the cylinder of the second cylindrical lens 30 in vertical direction, the first cylindrical lenses 20 use
Directional light is pooled in the illuminating bundle that light source is deposited component in the horizontal direction, the second cylindrical lenses 30 are used for light source 10
The illuminating bundle for depositing component in vertical direction pools directional light, forms long axis direction horizontal vertical elliptical light in the horizontal direction
Field (as shown in Figure 7).
The present embodiment, the first cylindrical lenses 20 have curvature in 10 short side direction of light source, are used for light source short side direction (Fig. 6
Middle transverse direction) light pool directional light, the light of component then allows it to pass through in 10 longitudinal direction of light source.First cylindrical lenses 20 this column
The second cylindrical lenses 30 are placed again after shape lens, and the second cylindrical lenses 30 only have curvature in 10 longitudinal direction of light source, by light
The light of component pools directional light in 10 longitudinal direction of source (vertical in Fig. 6), due to the light of component on script light source short side direction
It has been parallel light, can have directly passed through the second cylindrical lenses 30, and because the first cylindrical lenses 20 and the second cylindrical lenses
30 focal length is different, therefore the illuminating bundle that light source 10 can be allowed to provide forms horizontal vertical oval light field (as shown in Figure 7).
For collecting light beam 40, the long side for collecting 40 light inputting end of light beam can be equal to the long side at light end, collect 40 light inputting end of light beam
Short side can be equal to light end short side.In other embodiments, the long side for collecting 40 light inputting end of light beam can also be not equal to light out
The long side at end, the short side for collecting 40 light inputting end of light beam can be not equal to the short side for going out light end.Collect the long side sum aggregate of 40 light inputting end of light beam
Two inner walls where light beam 40 goes out the long side at light end are the first inner wall, collect the short side sum aggregate light beam of 40 light inputting end of light beam
40 two inner walls out where the short side at light end are second inner wall, and the first inner wall and the second inner wall are equipped with
Optical coating, light beam is incident on can be reflected equipped with optically coated first inner wall and the second inner wall, then from collection light beam
40 outgoing.Optically coated incident angle on first inner wall and the optically coated incident angle on the second inner wall not phase
Together, that is, collect the collection light beam that light beam 40 is asymmetric plated film.
For Digital Micromirror Device 50 (digital micro-mirror device, abbreviation DMD), Digital Micromirror Device
50 be a kind of photoswitch, including is rectangular active region, and active region is equipped with micro-reflector (abbreviation micro mirror), and rotational micromirror can
To realize the folding of photoswitch.Specifically, when placing Digital Micromirror Device 50, long side and the light harvesting column length side of active region can be made
Corresponding, active region short side is corresponding with collection light beam short side.As shown in Fig. 8, Digital Micromirror Device 50 per a piece of micro mirror can ±
It is rotated between a angle, such as between ± 12 degree, micro mirror has open state, and (on state, the micro mirror under open state is relative to parallel shape
State is in the angle+a), off status (off state, micro mirror under off status are in the angle-a relative to parastate) and parastate
(flat state), the micro mirror of the Digital Micromirror Device 50 at open state (on state) understand reflected image light beam to projection lens
Head, certain Digital Micromirror Device 50 can also reflect some light beams for example for covering the screening glass of micro mirror, in this way may with open
The image strip of state micro-mirrors reflection is overlapped and forms stray light.
In one embodiment, Digital Micromirror Device 50 can be the first Digital Micromirror Device or the second digital micromirror device
Part.As shown in figure 9, it is rectangular active region that the first Digital Micromirror Device, which includes, active region is equipped with square micro mirror, micro mirror
Rotary shaft extend along the diagonal of micro mirror, and, the incident direction and active region of illuminating bundle parallel with active region short side
Short side direction is vertical；Micro mirror and light beam incident direction when in open state form default angle, micro mirror when in off status
Default angle is formed with the opposite direction of light beam incident direction.As shown in Figure 10, the second Digital Micromirror Device is including being rectangular
Active region, active region are equipped with the micro mirror being square, and illuminating bundle enters from the first long side of active region, and incidence side
To vertical with the first long side, in micro mirror close to the first long side and it is parallel with the first long side beyond to be micro mirror be open state when
Landing side, landing when micro mirror is off status is adjacent when with micro mirror being the landing of open state, and illuminating bundle incidence is most
Micro mirror when off status, the light beam of reflection be finally from be off status close to micro mirror when the side on landing side be emitted, and it is anti-
Landing side when the optical path and micro mirror of irradiating light beam are off status forms angle.Specifically, the first Digital Micromirror Device is to include
0.45 inch of diagonal micro mirror array realizes that the Digital Micromirror Device that WXGA resolution ratio widescreen is shown, concrete model are
0.45WXGA DMD.Specifically, the second Digital Micromirror Device is the diagonal micro mirror array for including 0.48 inch, TRP can be achieved
The Digital Micromirror Device of WUXGA resolution ratio, concrete model are 0.48TRP WUXGA DMD.
In one embodiment, Digital Micromirror Device 50 is the first Digital Micromirror Device, collects the length of 40 light inputting end of light beam
Two the first inner walls of side and collection light beam 40 out where the long side at light end are equipped with the optical coating of 45 degree of incidence angles, light harvesting
Two the second inner walls where the short side sum aggregate light beam 40 of 40 light inputting end of column goes out the short side at light end are equipped with 15 degree of incidence angles
Optical coating.
In another embodiment, Digital Micromirror Device 50 is the second Digital Micromirror Device,；Collect the length of the light inputting end of light beam 40
Side sum aggregate light beam 40 goes out optical coating of two inner walls equipped with 15 degree of incidence angles where the long side at light end；Collection light beam 40 enters light
The short side sum aggregate light beam 40 at end goes out optical coating of two inner walls equipped with 45 degree of incidence angles where the short side at light end.
Light reflectivity can be improved in collection light beam interior surface in optical coating setting.The light harvesting of the utility model embodiment
Column 40, the long side for collecting 40 light inputting end of light beam is incident, from the reflection where the illuminating bundle that the long side that collection light beam 40 goes out light end is emitted
Reflection where face, with the illuminating bundle for the short side outgoing for collecting the short side incidence of 40 light inputting end of light beam, going out light end from collection light beam 40
Face, optically coated incidence angle is different, i.e., collection light beam 40 sets the optical coating there are two types of incident angle, and collection light beam 40 belongs to asymmetric
The collection light beam of plated film, advantageously forming cross section is elliptical illuminating bundle, it is possible to reduce light loss consumption promotes light using effect
Rate.Through inventor it is demonstrated experimentally that the collection light beam of asymmetric plated film, brightness performance, which compares, claims plated film light harvesting pillar height 3%, illustrate non-
The collection light beam of symmetrical plated film can promote light utilization ratio.
In one of the embodiments, as shown in Fig. 1 or 6, light harvesting column system further includes being arranged in the second cylindrical lenses 30
And the collective optics 60 between collection light beam 40, and collection light beam 40 and Digital Micromirror Device 50 are set to including at least one
Between lens 70, collective optics 60 be located at the second cylindrical lenses 30 outgoing illuminating bundle propagation path on, collect light beam 40
On the propagation path of the illuminating bundle for the light beam being emitted from lens 70；Collective optics 60 are used for will be from the second cylindrical lenses 30
The illuminating bundle of outgoing converges to collection light beam 40, and lens 70 are located on the propagation path for the illuminating bundle that collection light beam 40 is emitted,
Lens 70 are used to converge the light beam of the collection sending of light beam 40 to Digital Micromirror Device 50.
Specifically, the quantity of lens 70 is 3, and the quantity of lens 70 can also be specifically arranged according to actual needs.Specifically,
For collective optics 60, collective optics 60 can be collector lens or collimating element (collimating element).
In one embodiment, Fig. 1 or Fig. 6 is please referred to, light harvesting column system further includes total internal reflection prism 90, complete interior
Reflecting prism 90 is the right-angle reflecting prism of right angled triangle including a cross section and a cross section is acute triangle
Acute angle deflection prism；Total internal reflection prism 90 is set between sheet feeding type 40 and Digital Micromirror Device 50, is located at from sheet feeding type
On the propagation path of the light beam of 40 outgoing, it is incident upon Digital Micromirror Device 50 for the illuminating bundle being emitted from lens 70 to be all-trans,
Then the image strip issued from Digital Micromirror Device 50 is converged into projection lens.
Further, in one embodiment, Digital Micromirror Device 50 is the first Digital Micromirror Device, and the first number is micro-
Light end short side is parallel out with light source 10 for the short side of mirror device active region, a right angle of the right-angle reflecting prism of total internal reflection prism 90
Side and light source go out light and hold row, another right-angle side and the first Digital Micromirror Device of the right-angle reflecting prism of total internal reflection prism 90 level with both hands
Active region it is parallel, the first Digital Micromirror Device outgoing image strip be to converge to projection lens through acute angle deflection prism.Tool
Body, as shown in Figure 1, when Digital Micromirror Device 50 is the first Digital Micromirror Device, the straight edge line lens 20 of the first cylinder and the
The straight edge line lens 30 of two cylinders can be first position relationship.
In another embodiment, Digital Micromirror Device 50 is the second Digital Micromirror Device, the illumination being emitted from collection light beam 40
Light beam is entered from acute angle deflection prism, is then reflected, is incident to the second Digital Micromirror Device from right-angle reflecting prism, the
The active region of two Digital Micromirror Device is parallel with a right-angle side of right-angle reflecting prism, the image of the second Digital Micromirror Device outgoing
Light beam is finally that another right-angle side through right-angle reflecting prism converges to projection lens.Specifically, as shown in figure 5, digital micro-mirror
When device 50 is the second Digital Micromirror Device, the straight edge line lens 20 of the first cylinder can be with the straight edge line lens 30 of the second cylinder
Second position relationship.
Light harvesting column system in the utility model embodiment finally utilizes projection lens to reflect Digital Micromirror Device 50
Image strip is projected to screen, and projection lens has baffle, and baffle can block stray light.Opal is the projection lens for being equipped with baffle
At head aperture, baffle is used to cover undesired veiling glare.The light harvesting column system of the present embodiment because the first cylindrical lenses 20 and
Second cylindrical lenses 30 can form oval light field, and the hot spot of image strip can become long and narrow, it is possible to reduce for example with screening glass
The overlapping of the reflected beams hot spot reduces the formation of stray light, light utilization efficiency can be improved.For example, as shown in figure 11, on state
The projected light beam of the micro mirror reflection of state in the hot spot that projection lens is formed be it is elliptical, with adjacent hot spot (such as off
The hot spot formed under state state and flat state state) almost without overlapping, almost without projection lens opal baffle
The stray light for needing to block；If the projected light beam that the micro mirror of on state state reflects is round in the hot spot that projection lens is formed
Shape, particularly with the small hot spot of F number (F number), projection lens opal baffle size is fixed again, then as shown in figure 12,
That is spot radius is big, is overlapped larger, it may appear that stray light that more, projection lens opal baffle needs to block (such as off
Stray light under state state and flat state state).
Above-mentioned light harvesting column system, light source 10 go out the long side at light end and the long side of collection 40 light inputting end of light beam, the long side for going out light end
In parallel, light source 10 go out light end short side with collection 40 light inputting end of light beam short side, out the short side at light end it is parallel, such illuminating bundle from
It is incident to collect light beam light inputting end long side, then it is corresponding go out the outgoing of light end long side from collection light beam 40, illuminating bundle is from collection 40 light inputting end of light beam
Short side is incident, then corresponding from the light end short side outgoing out of collection light beam 40, collects the same reflecting surface internal light incident angle of light beam 40
It is relatively simple, there is no need to carry out different Coating optimizations for the same reflecting surface, for single incidence angle coating operation letter
It is single.And having the first cylindrical lenses 20 and the second cylindrical lenses 30, the focal length of the first cylindrical lenses 20 is saturating less than the second column
Mirror 30 can form asymmetrical angle spatial distribution and go out light, will form oval light field in this way, so that image strip is in projection lens
The light spot shape of head is also elliptical, it is possible to reduce image strip is overlapping with stray light, reduces light loss to improve light utilization
Rate.Go out the reflection where the illuminating bundle of the long side outgoing at light end from the long side incidence of collection 40 light inputting end of light beam, from collection light beam 40
Face, with the short side from collection 40 light inputting end of light beam it is incident, from anti-where the illuminating bundle that the short side that collection light beam 40 goes out light end is emitted
Face is penetrated, optically coated incident angle is not identical, is also beneficial to collection light beam 40 and forms asymmetrical angle spatial distribution and go out light, helps
In raising light utilization efficiency.
Illuminating bundle can be realized using single light harvesting column sleeve part in light harvesting column system in the utility model embodiment
It propagates.
Light harvesting column system in the utility model embodiment can be applied in asymmetrical etendue system, and light can be improved
The light utilization efficiency of exhibition amount system.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed,
But it cannot be understood as the limitations to utility model patent range.It should be pointed out that for the common skill of this field
For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to
The protection scope of the utility model.Therefore, the scope of protection shall be subject to the appended claims for the utility model patent.
Claims (9)
1. a kind of light harvesting column system characterized by comprising
Light source, including be rectangular light end out, for providing illuminating bundle；
First cylindrical lenses, on the propagation path of the illuminating bundle；
Second cylindrical lenses, on the propagation path for the illuminating bundle being emitted from first cylindrical lenses, first column
Shape lens are between the light source and second cylindrical lenses；The focal length of first cylindrical lenses, which is not equal to, states the second column
The focal length of shape lens；First cylindrical lenses and the second cylindrical lenses are used to the illuminating bundle pooling directional light,
And form oval light field；
Collect light beam, including for rectangular light inputting end and be rectangular light end out, set on second cylindrical lenses outgoing
On the propagation path of illuminating bundle, there is uniform strength distribution for will be formed from the illuminating bundle of collection light beam light inputting end incidence
, go out light from collection light beam and bring out the illuminating bundle penetrated, the light source go out the long side at light end and the long side of the collection light beam light inputting end,
The long side at light end is parallel out, and the light source goes out the short side at light end and the short side of the collection light beam light inputting end, the short side that goes out light end is flat
Row；Wherein, the first inner wall of the collection light beam and the second inner wall are equipped with optical coating, the light on first inner wall
Incident angle and the optically coated incident angle on second inner wall for learning plated film be not identical, the collection light beam light inputting end
Long side and it is described collection light beam go out the long side at light end where two inner walls be first inner wall, the collection light beam enters
Two inner walls where the short side at light end and the collection light beam go out the short side at light end are second inner wall；And
Digital Micromirror Device is projected the image strip by projection lens for illuminating bundle to be converted to image strip
To screen.
2. light harvesting column system according to claim 1, which is characterized in that the Digital Micromirror Device is the first digital micro-mirror
Device；First Digital Micromirror Device is including being rectangular active region, and active region is equipped with square micro mirror, the rotation of micro mirror
Shaft extends along the diagonal of micro mirror, and parallel with active region short side, the incident direction and active region short side of illuminating bundle
Direction is vertical；Micro mirror and light beam incident direction when in open state form default angle, micro mirror and light when in off status
The opposite direction of beam incident direction forms default angle；
First inner wall is equipped with the optical coating of 45 degree of incidence angles, and first inner wall is equipped with 15 degree of incidence angles
Optical coating.
3. light harvesting column system according to claim 1, which is characterized in that the Digital Micromirror Device is the second digital micro-mirror
Device；Second Digital Micromirror Device include be rectangular active region, the active region is equipped with the micro mirror that is square,
Illuminating bundle enters from the first long side of the active region, and incident direction is vertical with first long side, leans in micro mirror
Nearly first long side and it is parallel with first long side beyond be micro mirror be open state when landing side, micro mirror is off status
When landing while with micro mirror be open state landing while it is adjacent, and illuminating bundle incidence most off status when micro mirror, reflection
Light beam be finally from be off status close to micro mirror when the side on landing side be emitted, and the optical path of the reflected beams and micro mirror are to close
Landing side when state forms angle；
First inner wall is equipped with the optical coating of 15 degree of incidence angles；Second inner wall is equipped with 45 degree of incidence angles
Optical coating.
4. light harvesting column system according to claim 1-3, which is characterized in that
The long side of the light source extends in a first direction, and the short side of the light source extends along the second horizontal direction, first column
The straight edge line of the cylinder of lens extends in a first direction, and the focal length of first cylindrical lenses is less than the coke for stating the second cylindrical lenses
Away from the straight edge line of the cylinder of second cylindrical lens extends in a second direction, and first cylindrical lenses are used for the light source
The light beam for depositing component in a first direction provided pools directional light, and second cylindrical lenses are for providing the light source
The light beam for depositing component in a second direction pool directional light, form the oval light field of long axis direction in a first direction.
5. light harvesting column system according to claim 1-3, which is characterized in that
The long side of the light source extends in a first direction, and the short side of the light source extends in a second direction, first cylindrical lens
The straight edge line of cylinder extend in a second direction, the focal length of first cylindrical lenses is less than the focal length for stating the second cylindrical lenses,
The straight edge line of the cylinder of second cylindrical lens extends in a first direction, and first cylindrical lenses are for providing the light source
The light beam for depositing component in a second direction pool directional light, second cylindrical lenses by what the light source provided for depositing
The light beam of component pools directional light in a first direction, forms long axis direction in the oval light field of second direction.
6. light harvesting column system according to claim 1-3, which is characterized in that the light harvesting column system further includes setting
The collective optics between second cylindrical lenses and the collection light beam are set, and are set to the light harvesting including at least one
Lens between column and the Digital Micromirror Device, the collective optics are located at the illumination light of second cylindrical lenses outgoing
On the propagation path of beam, on the propagation path for the illuminating bundle that the collection light beam is located at the light beam being emitted from the lens；
The collective optics are used to the illuminating bundle being emitted from second cylindrical lenses converging to the collection light beam, and the lens
On the propagation path of the illuminating bundle of the collection light beam outgoing, the lens are used to converge the light beam that the collection light beam issues
On to the Digital Micromirror Device.
7. light harvesting column system according to claim 1, which is characterized in that the light collection system further includes total internal reflection rib
Mirror, the total internal reflection prism includes the right-angle reflecting prism that cross section is right angled triangle and cross section is acute triangle
Acute angle deflection prism is set between the collection light beam sum number word micro mirror element, and is located at the light beam being emitted from the collection light beam
It, then will be from for that will be all-trans from the illuminating bundle that the collection light beam is emitted and be incident upon the Digital Micromirror Device on propagation path
The image strip that the Digital Micromirror Device issues converges to the projection lens.
8. light harvesting column system according to claim 7, which is characterized in that the Digital Micromirror Device is the first digital micro-mirror
Device, first Digital Micromirror Device is including being rectangular active region, and active region is equipped with square micro mirror, the rotation of micro mirror
Shaft extends along the diagonal of micro mirror, and parallel with active region short side, the incident direction and active region short side of illuminating bundle
Direction is vertical；Micro mirror and light beam incident direction when in open state form default angle, micro mirror and light when in off status
The opposite direction of beam incident direction forms default angle；
It is parallel that the short side of the first Digital Micromirror Device active region and the light source go out light end short side, the total internal reflection prism
Right-angle reflecting prism a right-angle side and light source go out light and hold row level with both hands, the right-angle reflecting prism of the total internal reflection prism it is another
Right-angle side is parallel with the active region of first Digital Micromirror Device, and the image strip of the first Digital Micromirror Device outgoing is
Projection lens is converged to through acute angle deflection prism.
9. light harvesting column system according to claim 7, which is characterized in that
The Digital Micromirror Device is the second Digital Micromirror Device, and second Digital Micromirror Device includes for rectangular active
Area, the active region are equipped with the micro mirror being square, and illuminating bundle enters from the first long side of the active region, and enters
It is vertical with first long side to penetrate direction, in micro mirror close to the first long side and it is parallel with first long side beyond be micro-
Landing side when mirror is open state, landing when micro mirror is off status is adjacent when with micro mirror being the landing of open state, and illuminates
Light beam incidence most off status when micro mirror, the light beam of reflection be finally from close to micro mirror be off status when landing side side
Outgoing, and the landing side when optical path of the reflected beams and micro mirror are off status forms angle；
The illuminating bundle being emitted from the collection light beam is entered from the acute angle deflection prism, is then reflected, anti-from right angle
Prism incidence is penetrated to second Digital Micromirror Device, the active region of second Digital Micromirror Device and right-angle reflecting prism
One right-angle side is parallel, and the image strip of the second Digital Micromirror Device outgoing is finally through the another of the right-angle reflecting prism
Right-angle side converges to projection lens.
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|---|---|---|---|
| CN201820632137.2U CN208270921U (en) | 2018-04-28 | 2018-04-28 | Light harvesting column system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820632137.2U CN208270921U (en) | 2018-04-28 | 2018-04-28 | Light harvesting column system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111258163A (en) * | 2020-03-19 | 2020-06-09 | 无锡视美乐激光显示科技有限公司 | Light source device, light path structure design method and projection system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111258163A (en) * | 2020-03-19 | 2020-06-09 | 无锡视美乐激光显示科技有限公司 | Light source device, light path structure design method and projection system |
| CN111258163B (en) * | 2020-03-19 | 2021-04-13 | 无锡视美乐激光显示科技有限公司 | Light source device, light path structure design method and projection system |
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