CN106647128A - Optical engine and laser protection equipment - Google Patents
Optical engine and laser protection equipment Download PDFInfo
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- CN106647128A CN106647128A CN201611248828.4A CN201611248828A CN106647128A CN 106647128 A CN106647128 A CN 106647128A CN 201611248828 A CN201611248828 A CN 201611248828A CN 106647128 A CN106647128 A CN 106647128A
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/208—Homogenising, shaping of the illumination light
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/48—Laser speckle optics
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2033—LED or laser light sources
- G03B21/204—LED or laser light sources using secondary light emission, e.g. luminescence or fluorescence
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/206—Control of light source other than position or intensity
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Projection Apparatus (AREA)
Abstract
The invention discloses an optical engine and laser protection equipment. An optical path comprises a uniform light part and a movement diffuser, wherein a light incident surface and/or a light emergent surface of the uniform light part is provided with a phase piece, and the position of the movement diffuser and an imaging position are conjugated. In the optical engine, on one hand, divergence angles of a light beam is versatile by superposition of diffusion effects of the phase piece and the movement diffuser, the optical path difference of the light beam is versatile due to the divergence angles of the light beam, so that the probability of generating a random phase is increased, a random speckle pattern is generated, and a speckle effect will be reduced when an integral effect is generated in a human eye by the random speckle pattern; and on the other hand, the position of the movement diffuser and the imaging position are conjugated, the random phase generated by an imaging surface is reflected to the greatest extent by the random phase generated by the light beam at the position, the random speckle pattern is generated by the random phase, the speckle effect is reduced when the integral effect is generated in the human eye by the random speckle pattern, so that a speckle phenomenon of the imaging surface is reduced.
Description
Technical field
The application is related to laser display field, more particularly to a kind of light engine and laser projection device.
Background technology
Laser is a kind of high brightness, and high directivity sends the light source of monochromatic coherent light beam, and LASER Light Source is excellent as one kind
Coherent source, high directivity good with monochromaticjty, the advantages of luminous flux is high, in recent years gradually as light source applications in projection
Display technology field.
The high coherence of laser also brings speckle effect when laser projection shows, speckle is that coherent source is thick in irradiation
During rough object, the light after scattering is identical due to its wavelength, phase-constant, will in space produce interference, in space some
Part interferes mutually long, and some parts interfere cancellation, and final result is that occur granular light and shade phase on screen
Between spot, these unfocused spots In the view of human eye be in flicker state, long-time viewing being also easy to produce dizziness sense of discomfort, more
The deterioration of projected image quality can be caused, the viewing experience of user is reduced.
Therefore, it is current problem demanding prompt solution to mitigate laser speckle problem.
The content of the invention
The embodiment of the present application provides a kind of light engine and laser projection device, to mitigate laser speckle, projected image
The problem of quality deterioration.
A kind of light engine provided in an embodiment of the present invention, including ray machine and at least one light source, send at least one face
The light beam of color, the transmission light path of the light beam sent in the light source includes：Even smooth part, motion diffuser；
The incidence surface and/or exiting surface of the even smooth part is provided with phase plate；
The motion diffuser is arranged in the transmission path of the light beam of the exiting surface outgoing of the even smooth part, the fortune
The position conjugate of position and projection imaging that animation beam is located, wherein, the light beam through the motion diffuser produce with
Machine phase place.
Alternatively, in the transmission path of the incident beam of the phase plate for arranging in the even smooth part incidence surface, it is provided with
The reflection type phase piece of vibration；Or,
In the transmission path of the outgoing beam of the phase plate arranged in the even smooth part incidence surface, the anti-of vibration is provided with
Emitting phase plate.
Alternatively, the mode of vibration of the reflection type phase piece of the vibration is translational movement.
Alternatively, the phase plate that the incidence surface of the even smooth part is arranged includes transmission-type phase plate or reflection type phase
Piece.
Alternatively, the phase plate that the exiting surface of the even smooth part is arranged includes transmission-type phase plate or reflection type phase
Piece.
Alternatively, the motion diffuser includes transmission-type motion diffuser or reflection-type motion diffuser.
Alternatively, the even smooth part includes optical wand or fly eye lens array.
Alternatively, at least one light source includes：Send the laser instrument of the first color laser, send the second color laser
Laser instrument and send the laser instrument of the 3rd color laser；Or,
At least one light source includes：At least send the laser instrument of the first color laser, and be excited to produce at least the
The light source of second colors and the 3rd color fluorescence；Or,
At least one light source includes：The laser instrument of the first color and the second color laser is at least sent, and is excited
Produce the light source of at least the 3rd color fluorescence.
Alternatively, first color is blueness, and second color is green, and the 3rd color is redness.
Laser projection device provided in an embodiment of the present invention, including above-mentioned light engine；
Light source in the light engine provides illumination for the ray machine in the light engine, and the ray machine is to light beam of light source
It is modulated, and exports to the camera lens of the ray machine and be imaged, projects to projection medium and form projected picture..
In the light engine that the embodiment of the present application is provided, including ray machine and at least one light source, send at least one color
Light beam, the transmission light path of the light beam sent in light source includes：Even smooth part, motion diffuser；The incidence surface of even smooth part
And/or exiting surface is provided with phase plate；Motion diffuser is arranged on the transmission path of the light beam of the exiting surface outgoing of even smooth part,
Position and the position conjugate of projection imaging that motion diffuser is located, motion diffuser makes light beam produce random phase.
In the embodiment of the present application, on the one hand, arrange phase plate in the incidence surface of even smooth part, its diffusion causes to enter
The dispersion angle of the light beam of even smooth part becomes variation, so as to change the phase place of light beam；Arrange in the exiting surface of even smooth part
Phase plate, its diffusion makes the dispersion angle from the light beam of even smooth part outgoing become variation, so as to change the phase of light beam
Position；Motion diffuser can be diffused to light beam, make the dispersion angle variation of light beam, and because its motion can improve generation at random
The number or probability of independent phase, so, by the superposition of phase plate and the diffusion of motion diffuser, makes the diverging of light beam
Angle becomes variation, and the variation of beam divergence angle causes the optical path difference mutation of light beam to obtain diversified, and light path is determined
The change of phase place, therefore the phase place of light beam changes, so as to light path difference causes the probability increase that random phase produces, at random
Phase place can produce random speckle pattern, and have the speckle pattern of randomness when human eye produces integrating effect, and speckle is imitated
Should weaken, so as to reduce the speckle phenomena of image；On the other hand, motion diffuser is located position and the position of projection imaging
Conjugation is put, because the position of the position correspondence projection imaging, the random phase distribution produced in the position light beam can be at utmost
Reflection correspondence position imaging surface produce random phase distribution, and on the position produce random phase it is more, due to
Can the most directly perceived or farthest affect on the imaging surface of correspondence position by the independent speckle pattern of random phase generation
Number, so as to the number of the speckle pattern on imaging surface is also more therewith, using human eye produce integrating effect, speckle effect meeting
Weaken, so as to the speckle phenomena of imaging surface weakens.
Description of the drawings
Technical scheme in order to be illustrated more clearly that the embodiment of the present application, below will be to making needed for embodiment description
Accompanying drawing is briefly introduced, it should be apparent that, drawings in the following description are only some embodiments of the present application, for this
For the those of ordinary skill in field, without having to pay creative labor, can be obtaining it according to these accompanying drawings
His accompanying drawing.
The configuration diagram of the light engine that Fig. 1 is provided for the embodiment of the present application；
Fig. 2 fixes Gauss before diffusion sheet 103 for the transmission-type that the light beam that the embodiment of the present application is provided is incident to shown in Fig. 1
The distribution schematic diagram of energy；
The energy that Fig. 3 is fixed after diffusion sheet 103 for the light beam that the embodiment of the present application is provided through the transmission-type shown in Fig. 1
Distribution schematic diagram；
Energy distribution schematic diagram of the light beam that Fig. 4 is provided for the embodiment of the present application after the even smooth part shown in Fig. 1；
Energy distribution of the light beam that Fig. 5 is provided for the embodiment of the present application after transmission-type Rotational diffusion piece 106 is illustrated
Figure；
Fig. 6 provides the laser projection for adding oscillating mirror before the even smooth part shown in Fig. 1 for the embodiment of the present application
The schematic diagram of equipment；
The structural representation of the laser projection system that Fig. 7 is provided for the embodiment of the present application.
Specific embodiment
The embodiment of the present application is described in detail below in conjunction with accompanying drawing.
In the light path of Laser Transmission, often there is more optical mirror slip, typically can include such as：Convex lens,
The optical mirror slips such as concave and convex lenses, dichroscope, collimation lens.Transmit in the light beam that laser instrument sends each eyeglass in the optical path,
It is transmitted or reflected, carries out optical treatment.
In laser delivery optics, dissipation spot is carried out using diffusion sheet or the diffusion sheet of rotation, mainly changed with space
Plus method make speckle refine and with time averaging method make speckle be superimposed principle.By the way that light beam is split as into many height
Light beam, speckle is refined, and the speckle pattern of different time points is overlapped homogenizes, by the integral action in human eye,
Make speckle phenomena desalination, weaken.
By using phase plate, even smooth part and motion diffuser, carrying out to laser beam hot spot in the embodiment of the present application
A certain degree of diffusion, diffusion causes the dispersion angle of light beam to become variation, and the variation of beam divergence angle causes light
The optical path difference mutation of beam obtains diversified, and light path determines the change of phase place, so that phase place changes, light path determines phase
The change of position, so as to the difference of light path causes the probability that random phase is produced to increase, increased the individual of laser beam space phase place
Number, reduces the coherence of laser beam, and certain homogenization is played to light beam, and then improves even light effect.By phase place
The diffusion of piece, then the multiple reflections through even smooth part and the further diffusion of motion diffuser, when making beam exit
Phase place changes, and because its motion can improve the number for producing random phase, and the position at motion diffuser place and imaging
Position conjugate, therefore the number of random phase of the position being imaged also increases, and the number of random phase increases, so that being formed
Facula position be moved, so as to avoid laser beam long-term irradiation to the same position of optical mirror slip, alleviate laser
Speckle, the problem of projected image quality deterioration.
In certain embodiments, the work that can change phase place of motion diffuser is realized using Rotational diffusion piece in the application
With, but Rotational diffusion piece is not limited to, the embodiment of the present application is realized changing phase place to adopting what part with what motion mode
Specific restriction is not done in effect, as long as the phase place that can make light beam changes.
In certain embodiments, realize that phase plate can change the phase place of incident beam using fixed diffusion sheet in the application
The effect of distribution, but be not limited to fix diffusion sheet, the embodiment of the present application using what part to realizing can changing for phase plate
Specific restriction is not done in the effect of the phase distribution of incident beam, as long as the phase distribution of incident beam can be changed.
In certain embodiments, realize that the reflection type phase piece of vibration makes the angle of light beam using oscillating mirror in the application
Degree becomes diversified effect, but is not limited to oscillating mirror, and the embodiment of the present application using what part to realizing the anti-of vibration
Specific restriction is not done in the effect of emitting phase plate, as long as the part can make the dispersion angle of light beam become variation.
For the technical scheme that clearer description the embodiment of the present application is provided, below in conjunction with the accompanying drawings to the embodiment of the present application
It is described in detail.
Referring to Fig. 1, the optics configuration diagram of the light engine provided for the embodiment of the present application.Wrap in the optics framework
Contain：Laser instrument 101, condenser lens 102, transmission-type fix diffusion sheet 103, optical wand 104, transmission-type and fix diffusion sheet 105, focus on
Lens 106, transmission-type Rotational diffusion piece 107, digital micromirror elements (Digital Micromirror Device, abbreviation DMD)
108.Wherein, laser instrument 101, condenser lens 102, transmission-type fix diffusion sheet 103, optical wand 104, transmission-type and fix diffusion sheet
105th, condenser lens 106, transmission-type Rotational diffusion piece 107 are the parts in light engine.
Transmission path of the laser in above-mentioned optics framework is as described below：
Laser instrument 101：For sending laser, the laser instrument can be respectively one or more laser instruments (only example in figure
Property show 3), the brightness of whole picture of multiple lasers A tunables, the embodiment of the present application is to the quantity of laser instrument and swashs
The color that light device sends does not do specific restriction.
The laser that laser instrument sends is incident to transmission-type and fixes diffusion after the convergence of condenser lens 102 with converged state
Piece 103, optical wand 104 is entered Jing after the diffused transmission that transmission-type fixes diffusion sheet 103, is fixed diffusion sheet 103 from transmission-type and is transmitted
With the light beam of diffusion inside optical wand 104 through multiple reflections from the light-emitting window outgoing of optical wand.
Fix after diffusion sheet 105 transmits and spread Jing transmission-type from the light beam of the light-emitting window outgoing of optical wand 104, be incident to poly-
Focus lens 106, the light beam of 106 pairs of diffusions of condenser lens enters line convergence.
The light beam of convergence is incident to transmission-type Rotational diffusion piece 107, Jing after the diffused transmission of transmission-type Rotational diffusion piece 107,
It is incident to DMD108.Wherein, transmission-type Rotational diffusion piece 107 is arranged on the conjugation position of the light beam imaging surface that laser instrument 101 sends
Put, transmission-type Rotational diffusion piece 107 be arranged on the position be because diffusion sheet rotate when, can produce on the screen of corresponding imaging
The superposition of random phase pattern, reaches the effect of dissipation spot.Specifically, transmission-type Rotational diffusion piece is located position and final sight
The position conjugate of the image surface seen, is conjugated in optical imagery, refers to that object space and image space have the two of one-to-one mapping relation
Point：Q points and Q' points, according to light path principle, if placing light source in Q points, will be imaged in Q' points, and vice versa.It is so mutual
Corresponding 2 points, referred to as a pair of conjugate points, conjugate point can constitute conjugate line, and then have conjugate planes, therefore can revolve transmission-type
The position for turning diffusion sheet place is referred to as object plane position, and the image surface finally seen is referred to as into image planes position.
At object plane position light beam is diffused using transmission-type Rotational diffusion piece 107, increased the random phase in space
Position, produces multiple independent speckle patterns, and being played by the integral action of human eye reduces the effect of speckle.Rotated by transmission-type
When diffusion sheet 107 plays certain homogenization to light beam, the hot spot that corresponding image planes position is formed also can be followed into line phase
It is average, therefore object plane position is larger with associating for imaging surface, and degree is homogenized to image planes position so as to object plane position light beam
The degree that homogenizes of light beam affects also larger.
Transmission-type Rotational diffusion piece 107 is arranged on the object plane position of DMD imaging surfaces in the embodiment of the present application, the position
Phase average effect largely have impact on the imaging surface of image, so as to largely weaken the effect of dissipation spot.Object plane
There is the relation of enlargement ratio position with being ultimately imaged face, and magnifying power is less, through Rotational diffusion piece homogenize effect it is average after dissipate
Spot particle is also less, and phase average effect is better, and the effect of final dissipation spot is also better.Therefore, it is desirable to from the light of optical wand outgoing
The size of spot is less with the size multiple of the size of the illumination beam hot spot needed for imaging surface.
In FIG diffusion sheet 103 is fixed by increasing transmission-type before optical wand 104, can be to the light beam of incident optical wand 104
It is diffused, changes the change of phase place, improve light beam into the effect that homogenizes of optical wand 104, the effect that homogenizes herein can be light
The uneven colour cast phenomenon for obtaining consistent or beam and focus of the colourity of beam hot spot can be obtained unanimously.While going out in optical wand 104
The position of optical port arranges again a piece of transmission-type and fixes diffusion sheet 105, and to the light beam from the outgoing of optical wand 104 change is spread again
The distribution of phase place, reaches further homogenized effect, and the light beam for fixing the transmission diffusion of diffusion sheet 105 from the transmission-type is passed through again
Transmission-type Rotational diffusion piece 107, the diffusion sheet of the rotation is yet further spread the change for changing phase place to light beam, and with
The rotation of Rotational diffusion piece, improves the number for producing random phase, so as to reduce speckle effect.
Based on the structure shown in Fig. 1, the light beam that laser instrument 101 sends is made through the diffusion that transmission-type fixes diffusion sheet 103
With rear, the dispersion angle of light beam becomes variation, and the variation of beam divergence angle causes the light path difference of light beam also to become much
Sample, and light path determines the change of phase place, so as to the difference of light path causes the probability that random phase is produced to increase, increased sharp
The number of light light beam space phase, but the space phase of the laser beam increased by the diffusion of fixed diffusion sheet is individual
Number is limited.Further, on the basis of it increased limited space phase number, by 107 pairs of light of transmission-type Rotational diffusion piece
Shu Jinhang further spreads, and then improves the number or probability for producing random independent phase place again, and independent phase refers to phase place
Difference, so as to be beneficial to multiple different independent speckle images are formed, and after the integral action of human eye, speckle effect weakens.
In optics framework shown in Fig. 1, it is both provided with transmission-type in the light inlet of optical wand 104 and the position of light-emitting window and fixes
Diffusion sheet, in certain embodiments, can only optical wand 104 light inlet position or only optical wand 104 light-emitting window position
Install transmission-type and fix diffusion sheet, the embodiment of the present application does not do specific restriction to this.
In optics framework shown in Fig. 1, fixed diffusion sheet is the fixed diffusion sheet of transmission-type, diffusion sheet is fixed certainly and also may be used
To be the fixed diffusion sheet of reflection-type, the placement location for adjusting diffusion sheet is needed when simply fixing diffusion sheet for reflection-type, so that
The light beam for fixing diffusion sheet reflection from reflection-type enters even smooth part, and the embodiment of the present invention is not done to the material of fixed diffusion sheet to be had
The restriction of body.
The even smooth part in optics framework shown in Fig. 1 is optical wand, and certainly even smooth part can also be fly eye lens array,
The embodiment of the present invention does not do specific restriction to this.
In light engine shown in Fig. 1, light source uses laser instrument, and it is glimmering that certain light source can also be that laser instrument and being excited is produced
The light source of light, light source can also be laser instrument and LED.When being embodied as, light source can include：Send the first face
The laser instrument of color laser, the laser instrument for sending the second color laser and send the laser instrument, or extremely of the 3rd color laser
The laser instrument of the first color laser is sent less, and is excited to produce the light source of at least the second color and the 3rd color fluorescence, also may be used
Being at least to send the laser instrument of the first color and the second color laser, and it is excited to produce the light of at least the 3rd color fluorescence
Source, wherein, first color can be blueness, and the second color can be green, and the 3rd color can be redness, and the present invention is implemented
Example does not do specific restriction to this.
Fig. 1 is only a kind of example to the optics framework based on light engine, also there is other optical rack structure, the application certainly
Embodiment is without limitation.
Below in conjunction with accompanying drawing, transmission-type is sequentially passed through to the laser beam shown in Fig. 1 and fixed before diffusion sheet 103, passed through
Transmission-type fixes the Gauss energy of light beam after diffusion sheet 103, after optical wand 104 and after transmission-type Rotational diffusion piece 107
Amount distribution is analyzed.
It is the distribution schematic diagram of laser beam energy referring to Fig. 2 to Fig. 5.In Fig. 2 to Fig. 5, X-axis represents the diverging of light beam
Angle, Y-axis represents the Gaussian Energy of light beam.
As shown in Fig. 2 it is exemplary show laser beam incide the transmission-type shown in Fig. 1 fix diffusion sheet 103 it
The distribution schematic diagram of front energy, figure it is seen that fixing the Gauss of laser beam before diffusion sheet 103 through transmission-type
Energy is mainly gathered in 0 degree of optical axis.
As shown in figure 3, exemplary shows laser beam after the transmission-type fixation diffusion sheet 103 shown in Fig. 1
Energy distribution schematic diagram, from figure 3, it can be seen that the energy of laser beam still Relatively centralized, but compare shown in Fig. 2
Gaussian Energy Distribution schematic diagram, its 0 degree of optical axis and neighbouring energy it is weakened.
As shown in figure 4, the exemplary distribution for showing energy of the laser beam after the optical wand 104 shown in Fig. 1
Schematic diagram, from fig. 4, it can be seen that because the diffusion that transmission-type fixes diffusion sheet 103 increases the angle of divergence of laser beam
Degree, after optical wand 104, light beam is inside optical wand 104 through multiple reflections so that the shooting angle of light beam becomes various
Change so that the Energy distribution of the light beam of multiple dispersion angles is compared with average specific, hot spot to homogenize effect obvious.Therefore Fig. 4 institutes
The distribution schematic diagram of the energy of the laser beam for showing compares the Energy distribution schematic diagram shown in Fig. 3, and Energy distribution is more uniform.
As shown in figure 5, exemplary shows laser beam light after the transmission-type Rotational diffusion piece 107 shown in Fig. 1
The distribution schematic diagram of the energy of beam, from fig. 5, it can be seen that laser beam is after Rotational diffusion piece, increases 0 degree of optical axis of deviation
Angle diversity so that the energy of light beam is redistributed between multiple dispersion angles, so as to finally give such as Fig. 5
Shown Energy distribution schematic diagram, compared with the Energy distribution schematic diagram shown in Fig. 2 to Fig. 4, the energy of the laser beam shown in Fig. 5
The peak of amount disappears, and Energy distribution relative equilibrium distribution between multiple dispersion angles and 0 degree of optical axis, this distribution mode is caused
The beam energy ratio of 0 degree of stronger optical axis of coherence weakens significantly, reduces speckle effect.
Add as the improvement to the light engine shown in Fig. 1, as shown in fig. 6, the incident even smooth part of laser beam it
Before, oscillating mirror is additionally provided with, the oscillating mirror is driven by driver part with certain frequency and is vibrated, oscillating mirror
Mode of vibration can be translation (translation is referred to and moved in the plane of galvanometer), oscillating mirror changes light by vibration
Spot is incident to the position of condenser lens, and then changes the position that hot spot is incident to transmission-type fixation diffusion sheet and even smooth part, right
Hot spot plays certain homogenization, when the vibration of oscillating mirror reaches certain frequency, is favorably improved speckle effect.
Specifically, oscillating mirror surface has micro-structural, variable grain degree when oscillating mirror is vibrated with translational movement
Micro-structural it is different to the reflex of light beam such that it is able to form diversified dispersion angle, it is incident equivalent to light beam
To rough and time dependent micro-structural, the translational motion of oscillating mirror causes the same sky of adjacent moment speculum
Between position micro-structural it is different, so as to light beam incides different micro-structure surfaces, make phase place during beam exit change
(the principle of similar deformable mirror：The convex-concave on deformable mirror surface changes by the random unordered change of programme-control, from
And the reflection to light beam also becomes mixed and disorderly unordered, the diversity of dispersion angle is increased).
It is a kind of optics configuration diagram of laser projection device provided in an embodiment of the present invention referring to Fig. 6.The optical rack
Structure includes：Blue laser 601, dichroic piece 602, green laser 603, dichroic piece 604, red laser 605, shake
Dynamic speculum 606, condenser lens 607, transmission-type fix diffusion sheet 608, even smooth part 609, transmission-type Rotational diffusion piece 610,
Condenser lens 611, DMD612, projection lens 613, projection screen 614.
Transmission path of the laser in the optics framework shown in Fig. 6 is as described below：
Blue laser 601 sends blue laser, and dichroic piece 602 passes through blue laser, 603, reflection green laser instrument
The green laser for going out, dichroic piece 604 swashs through blue laser and green laser, the redness that reflection red laser 605 sends
Light, from the light beam of the outgoing of dichroic piece 604 oscillating mirror 606 is incident to, and blue laser, green laser, red laser are passed through
Condenser lens 607 is incident to after the reflection of oscillating mirror 606, after condenser lens 607 is assembled, is incident to converged state
Transmission-type fixes diffusion sheet 608, fixes after diffusion sheet 608 spreads through transmission-type and enters even smooth part 609, in even smooth part
From the outgoing of transmission-type Rotational diffusion piece 610 after multiple reflections inside 609, from the light of the outgoing of transmission-type Rotational diffusion piece 610
Beam, incides on DMD612 through the converging action of condenser lens 611.The illuminator (being not shown) of DMD612 front ends
Light beam is guided to DMD surfaces, DMD is made up of thousands of small reflector, and these small reflectors reflect light beam into projection
Camera lens 613 is imaged, and is projected to projection screen 614, forms projected image.
Find out from the optics framework shown in Fig. 6, on the basis of the optics framework shown in Fig. 1 oscillating mirror is increased
606, oscillating mirror 606 pairs is incident to the light beam of transmission-type fixation diffusion sheet 608 and homogenizes, and then improves homogenizing for light beam
Effect, the effect that homogenizes herein may refer to the colourity of beam and focus and uneven obtain consistent or colour cast phenomenon and obtain unanimously, together
The Rotational diffusion piece of the even smooth part exiting surfaces of Shi Peihe further carries out preferable diffusion to light beam, improves and produces at random
The number or probability of independent phase, so as to form multiple different independent speckle images, after human eye integration, speckle effect subtracts
It is weak.
From in terms of the transmission direction of light beam, oscillating mirror 606 can before and after translation, it is also possible to left and right translation, it is also possible on
Lower translation.Fig. 6 shows a case that translation before and after oscillating mirror, wherein, 606-1 and 606-2 represents respectively oscillating mirror
Two diverse locations before and after 606 during translation.
Oscillating mirror 606 shown in Fig. 6 is arranged on the transmission path that transmission-type fixes the incident beam of diffusion sheet 608
On, certain oscillating mirror can also be arranged in the transmission path of the outgoing beam that transmission-type fixes diffusion sheet 608, equally may be used
To reach homogenized effect, the embodiment of the present invention does not do specific restriction to this.
If oscillating mirror 606 is arranged in the transmission path of the outgoing beam that transmission-type fixes diffusion sheet 608, even light portion
Part 609 is preferably fly eye lens array, to receive the incident beam compared with high dispersion angle.Fly eye lens array is two row compound eyes
Lens arra is arranged in parallel, the focus of each junior unit lens in first row fly eye lens array and the fly's-eye lens of secondary series
The center superposition of corresponding junior unit lens in array, the optical axis of two row fly's-eye lenses is parallel to each other, in secondary series fly's-eye lens
After place condenser, the focal plane of condenser is put lighting screen and is formed illuminator, can receive the incidence of high dispersion angle
Light beam.
In order to further enhance dissipation spot effect, the part of other auxiliary speckles can also be in the optical path further added by, such as
The oscillating mirror vibrated with translational movement in the embodiment of the present application, is provided with micro-structural, micro- knot on translation oscillating mirror
Structure can be molded at random, have not regulation, and so as to coordinate the motion mode of translation, can produce similar deformable mirror
Effect, increases the diversity of beam divergence angle, and the diversity of final dispersion angle causes beam propagation light path different, finally leads
Cause phase place different, the effect of dissipation spot is played to a certain extent.
Same setting focusing as shown in Figure 6 is saturating behind the optical texture schematic diagram of the light engine shown in Fig. 1
Mirror 611, DMD612, projection lens 613 and projection screen 614, can also constitute projector equipment, light beam transmission path wherein
As shown in Fig. 6, here does not do specific description to this, and associated description can be found in the concrete introduction to Fig. 6.
Fig. 7 shows the laser projection system schematic diagram that the embodiment of the present application is provided.
As shown in fig. 7, the laser projection system includes：Light engine 701, projection screen 702.
Wherein, light engine 701 is the light engine that the above embodiments of the present application are provided, and specifically can be found in aforementioned enforcement
Example, here will not be described in great detail.
Specifically, the light source 703 in light engine is that ray machine 704 provides illumination, and ray machine 704 is adjusted to light beam light beam
System, and the lens imaging into ray machine is exported, it is transmitted through projection medium 702 (such as screen or body of wall etc.) and forms projected picture.
The application is the flow process with reference to method, equipment (system) and computer program according to the embodiment of the present application
Figure and/or block diagram are describing.It should be understood that can be by computer program instructions flowchart and/or each stream in block diagram
The combination of journey and/or square frame and flow chart and/or the flow process in block diagram and/or square frame.These computer programs can be provided
The processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing devices is instructed to produce
A raw machine so that produced for reality by the instruction of computer or the computing device of other programmable data processing devices
The part of the function of specifying in present one flow process of flow chart or one square frame of multiple flow processs and/or block diagram or multiple square frames.
These computer program instructions may be alternatively stored in can guide computer or other programmable data processing devices with spy
In determining the computer-readable memory that mode works so that the instruction being stored in the computer-readable memory is produced to be included referring to
Make the manufacture of part, the instruction unit realize in one flow process of flow chart or one square frame of multiple flow processs and/or block diagram or
The function of specifying in multiple square frames.
These computer program instructions also can be loaded into computer or other programmable data processing devices so that in meter
Series of operation steps is performed on calculation machine or other programmable devices to produce computer implemented process, so as in computer or
The instruction performed on other programmable devices is provided for realizing in one flow process of flow chart or multiple flow processs and/or block diagram one
The step of function of specifying in individual square frame or multiple square frames.
Although having been described for the preferred embodiment of the application, those skilled in the art once know basic creation
Property concept, then can make other change and modification to these embodiments.So, claims are intended to be construed to include excellent
Select embodiment and fall into having altered and changing for the application scope.
Obviously, those skilled in the art can carry out the essence of various changes and modification without deviating from the application to the application
God and scope.So, if these modifications of the application and modification belong to the scope of the application claim and its equivalent technologies
Within, then the application is also intended to comprising these changes and modification.
Claims (10)
1. a kind of light engine, including ray machine and at least one light source, the light source sends the light beam of at least one color, and it is special
Levy and be, the transmission light path of the light beam sent in the light source includes：Even smooth part, motion diffuser；
The incidence surface and/or exiting surface of the even smooth part is provided with phase plate；
The motion diffuser is arranged in the transmission path of the light beam of the exiting surface outgoing of the even smooth part, and the motion is unrestrained
Position and the position conjugate of projection imaging that beam is located, wherein, the light beam produces random phase through the motion diffuser
Position.
2. light engine as claimed in claim 1, it is characterised in that the phase plate arranged in the even smooth part incidence surface
In the transmission path of incident beam, the reflection type phase piece of vibration is provided with；Or,
In the transmission path of the outgoing beam of the phase plate arranged in the even smooth part incidence surface, the reflection-type of vibration is provided with
Phase plate.
3. light engine as claimed in claim 2, it is characterised in that the mode of vibration of the reflection type phase piece of the vibration is
Translational movement.
4. light engine as claimed any one in claims 1 to 3, it is characterised in that the incidence surface of the even smooth part sets
The phase plate put includes transmission-type phase plate or reflection type phase piece.
5. light engine as claimed any one in claims 1 to 3, it is characterised in that the exiting surface of the even smooth part sets
The phase plate put includes transmission-type phase plate or reflection type phase piece.
6. light engine as claimed any one in claims 1 to 3, it is characterised in that the motion diffuser includes transmission
Type motion diffuser or reflection-type motion diffuser.
7. light engine as claimed any one in claims 1 to 3, it is characterised in that the even smooth part include optical wand or
Fly eye lens array.
8. light engine as claimed any one in claims 1 to 3, it is characterised in that at least one light source includes：Send out
Go out the laser instrument of the first color laser, send the laser instrument of the second color laser and send the laser instrument of the 3rd color laser；Or
Person,
At least one light source includes：The laser instrument of the first color laser is at least sent, and is excited to produce at least the second face
The light source of color and the 3rd color fluorescence；Or,
At least one light source includes：The laser instrument of the first color and the second color laser is at least sent, and is excited to produce
At least light source of the 3rd color fluorescence.
9. light engine as claimed in claim 8, it is characterised in that first color is blueness, second color is
Green, the 3rd color is redness.
10. the light engine described in a kind of any one of laser projection device, including claim 1 to 9 claim；
Light source in the light engine provides illumination for the ray machine in the light engine, and the ray machine is carried out to light beam of light source
Modulation, and export to the camera lens of the ray machine and be imaged, project to projection medium and form projected picture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611248828.4A CN106647128A (en) | 2016-12-29 | 2016-12-29 | Optical engine and laser protection equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611248828.4A CN106647128A (en) | 2016-12-29 | 2016-12-29 | Optical engine and laser protection equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106647128A true CN106647128A (en) | 2017-05-10 |
Family
ID=58836426
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611248828.4A Pending CN106647128A (en) | 2016-12-29 | 2016-12-29 | Optical engine and laser protection equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106647128A (en) |
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Application publication date: 20170510 |