CN203217230U - Lighting device and projection system - Google Patents

Abstract

The utility model embodiment discloses an illuminating device and a projection system. The illuminating device comprises a first laser light source and a second laser light source, wherein an optical path adjusting device receives first laser light and second laser light that are incident from the same direction, then the optical path adjusting device enables the first laser light and the second laser light to be emitted out along different optical paths, the first laser light emitted out by the optical path adjusting device is received by a first lens and then is focused to a wavelength conversion device, the second laser light emitted out by the optical path adjusting device is received by a second lens which is as same as the first lens and then is focused to a scattering device, the first laser light is converted into excited light by the wavelength conversion device and then the excited light is emitted to the first lens, the second laser light is scattered by the scattering device and then the scattered second laser light is emitted to the first lens, optical distance between the wavelength conversion device and the first lens is equal to optical distance between the scattering device and the second lens, optical distance between the first lens and the optical path adjusting device is equal to optical distance between the second lens and the optical path adjusting device, and the optical path of the excited light emitted out by the fist lens and the optical path of the second laser light emitted out by the second lens are superposed after the excited light emitted out by the fist lens and the second laser light emitted out by the second lens pass the optical path adjusting device. The utility model provides the illuminating device and the projection system which are characterized by mixture uniformity and compact structures.

Description

Lighting device and projection system

technical field

The utility model relates to the technical field of illumination and display, in particular to a light emitting device and a projection system.

Background technique

Laser phosphor technology is a new type of high-brightness light source solution, which can be widely used in projection display and other fields. Laser phosphor technology uses laser to excite phosphor to generate light as a light source. Since the optical power density of the laser is very high, the optical power density of the stimulated light generated by the excited phosphor is also high, so that the light source can generate high-brightness stimulated light or the mixed light of the stimulated light and the excited light.

Figure 1 is a schematic structural view of a light emitting device in the prior art, as shown in Figure 1, the wavelength conversion device includes a first laser light source 110, a second laser light source 120, a reflective color wheel 130, a scattering device 140, a first filter A light sheet 150 , a second filter 160 , a lens 170 , and a dodging rod 180 . The first laser light source 110 emits a 445nm blue laser, and the 445nm blue laser is purple in color. Although it is not suitable for direct projection display, it has a high efficiency in exciting phosphor powder. The 445nm blue laser is filtered by the first filter After being reflected by the flake 150, it is incident on the reflective color wheel 130 to generate yellow stimulated light. The yellow light emitted from the color wheel 130 will pass through the first filter 150 to the second filter 160 . The second laser light source 120 emits a 462nm blue laser, and the 462nm laser color is suitable for directly displaying blue light in projection display. The 462nm blue laser light is incident on the second filter 160 after passing through the scattering device 140 . The second optical filter 160 combines the incident 462nm blue laser light and the yellow received light into the same optical path and sequentially emits to the lens 170 and the homogenizing rod 180 to obtain white light mixed light.

However, the problem with the light emitting device shown in FIG. 1 is that the yellow light component and the blue light component in the mixed white light emitted by the light emitting device are not uniformly mixed, and color cast phenomenon may occur. In addition, the structure of the whole light emitting device is relatively complicated and not compact enough.

Utility model content

The technical problem mainly solved by the utility model is to provide a light-emitting device and a projection system with relatively uniform mixing and compact structure.

The embodiment of the utility model provides a light emitting device, including:

a first laser light source, configured to emit a first laser;

a second laser light source, configured to emit a second laser;

An optical path adjustment device, configured to receive the first laser and the second laser incident in the same direction, and make the first laser and the second laser emit along different optical paths;

The first lens is used to receive the first laser light emitted by the optical path adjustment device and focus the first laser light to the wavelength conversion device, and collimate the received laser light emitted by the wavelength conversion device and emit it to the optical path adjustment device;

The second lens, which is the same as the first lens, is used to receive the second laser light emitted by the optical path adjustment device and focus the second laser light to the scattering device, and collimate the scattered light emitted by the scattering device and emit it to the optical path adjustment device;

The wavelength conversion device includes a first surface, the first surface is used to receive the first laser light emitted by the first lens, the wavelength conversion device converts the first laser light into a subject light and emits the subject light from the first surface to the first lens ;

The scattering device includes a second surface, the second surface is used to receive the second laser light emitted by the second lens, the scattering device scatters the second laser light, and emits the scattered second laser light from the second surface to the first lens ;

The optical distance from the wavelength conversion device to the first lens is equal to the optical distance from the scattering device to the second lens, and the optical distances from the first lens and the second lens to the optical path adjustment device are equal, and the output of the wavelength conversion device is collimated through the first lens. After the received light and the scattering device are collimated by the second lens, the emitted second laser is merged into the same optical path and emitted by the optical path adjustment device, and the optical paths of the combined received light and the second laser are overlapped.

Preferably, the first laser light source and the second laser light source are arranged in the same light source module, and the first laser light and the second laser light emit in the same direction.

Preferably, the first laser light source and the second laser light source are arranged in the same light source module, and the first laser light and the second laser light emit in the same direction.

Preferably, the optical path adjustment device is an optical filter, which has the optical characteristics of transmitting the second laser light in the first polarization state and receiving the light, reflecting the first laser light and perpendicular to the second laser light in the first polarization state, or, The optical filter has the optical characteristics of reflecting the second laser light of the first polarization state and the received light and transmitting the first laser light and the second laser light perpendicular to the first polarization state, and the first laser light emitted by the first laser light source is in the first The polarization state is incident on the filter.

Preferably, the light emitting device further includes a quarter-wave plate, and the quarter-wave plate is located between the optical path adjustment device and the scattering device.

Preferably, the light emitting device further includes a fly-eye lens or a pair of fly-eye lenses, the fly-eye lens or the pair of fly-eye lenses are used to receive the first laser and the second laser, and make the first laser and the second laser uniform before emitting to the optical path adjustment device .

Preferably, the fly-eye lens or the fly-eye lens homogenizes the light spot and emits it to the scattering device and the wavelength converting device in a rectangular shape of 4:3 or 16:9.

Preferably, the light emitting device further includes a scattering lens, which is located on the optical path of the second laser light between the fly-eye lens or the pair of fly-eye lenses and the second lens, and is used for diverging the second laser light.

Compared with the prior art, the utility model embodiment has the following beneficial effects:

In the embodiment of the present invention, since the optical distance from the wavelength conversion device to the first lens is equal to the optical distance from the scattering device to the second lens, the optical distances from the first lens and the second lens to the optical path adjustment device are equal, and the first lens Same as the second lens, the beam spot size of the collimated incident first laser beam focused on the surface of the wavelength conversion device by the first lens is equal to the spot size of the collimated incident second laser beam focused on the surface of the scattering device by the second lens. In addition, the reflective scattering device can scatter the incident light into a Lambertian distribution, and the emitted light from the wavelength conversion device is also a Lambertian distribution. After the lens and the second lens are collimated, beams with the same shape, the same light intensity distribution and the same cross-sectional area are formed. Moreover, the light beams overlap after passing through the optical path adjustment device, so the two light spots overlap, and after the two light paths are merged, the distribution of the outgoing light of the optical path adjustment device is more uniform. At the same time, only one optical path adjustment device is used to realize the light splitting of the first laser light and the second laser light before scattering and the combination of the light receiving light and the second laser light after scattering, which improves the structural compactness of the light emitting device.

Description of drawings

FIG. 1 is a schematic structural view of a light emitting device in the prior art;

Fig. 2 is a structural schematic diagram of an embodiment of the light emitting device of the present invention;

Fig. 3 is the light transmittance curve of the filter of the light-emitting device shown in Fig. 2;

Fig. 4 is when the positions of the wavelength conversion device and the scattering device in the light-emitting device shown in Fig. 2 are reversed

The light transmittance curve of the filter.

Detailed ways

The embodiments of the present utility model will be analyzed in detail below in conjunction with the accompanying drawings and implementation methods.

Embodiment one:

Figure 2 is a schematic structural view of an embodiment of the light emitting device of the present invention, as shown in Figure 2, the light emitting device includes a first laser light source 210, a second laser light source 220, a wavelength conversion device 230, a scattering device 240, and an optical path adjustment device 250 , the first lens 260, and the second lens 270.

The first laser light source 210 can emit a first laser light L1, and the second laser light source 220 can emit a second laser light L2. Specifically, the first laser L1 is a 445nm blue laser, which can be used to excite the wavelength conversion material to obtain the received light; the second laser L2 is a 462nm blue laser, which can be used as a blue component for projection display. For the convenience of assembly, the first laser light source 210 and the second laser light source 220 are located in the same light source module and on the same plane of the light source module, so that the first laser light L1 and the second laser light L2 emit in the same direction.

The wavelength conversion device 230 includes a wavelength conversion layer 231 and a reflective layer 232. The wavelength conversion layer 231 includes a yellow light wavelength conversion material, which can receive the excitation light and convert it into yellow light to be emitted, and the emitted light directly from the wavelength conversion device 230 is a Lambertian distribution. The wavelength converting material in this embodiment is phosphor, such as YAG phosphor, which can absorb blue light and be stimulated to emit yellow light. The wavelength conversion material may also be materials with wavelength conversion capabilities such as quantum dots and fluorescent dyes, and is not limited to phosphors.

The first surface 231a of the wavelength conversion layer 231 receives the incident excitation light, and the reflection layer 232 is arranged on the surface opposite to the first surface 231a of the wavelength conversion layer 231, which can reflect the excitation light or the subject light incident on its surface, so The received light generated by the wavelength conversion layer 231 also exits from the first surface 231a. The reflective layer 232 here is specifically a high-reflective aluminum sheet, and the high-reflective aluminum sheet can also function as a substrate to support the wavelength conversion layer 231 . However, when the wavelength conversion layer 231 itself is rigid enough (for example, the wavelength conversion layer is formed by doping phosphor powder in transparent glass), the wavelength conversion layer 231 does not need a substrate for support, and the reflective layer 232 can be Plating on the surface of the wavelength conversion layer 231 also has a reflection effect. However, if the thickness of the wavelength conversion material in the wavelength conversion layer 231 is sufficient, the reflective layer 232 may not be provided.

Since the outgoing light of the wavelength conversion device 230 is a Lambertian distribution, in order to make the distribution of the outgoing light of the scattering device 240 consistent with the outgoing light of the wavelength conversion device 230 to obtain a more uniform mixed light, the scattering device 240 must also be able to convert the incident first The second laser light L2 scatters into a Lambertian distribution. After a lot of experiments and tests, we found that only a reflective scattering device can scatter the second laser light L2 into a distribution close to Lambertian. This is because the generally used transmissive scattering device (such as the scattering device 140 in Figure 1) has a local area with little scattering or even pinholes ( pin hole) allows the incident laser light to form outgoing light with little scattering or even no scattering (directly passing through the pinhole). This part of the light still has strong directionality and does not obey the Lambertian distribution. However, if the thickness or density of the scattering device is increased to completely eliminate the occurrence of pinholes, the transmittance of incident light will be greatly reduced, thereby reducing the efficiency of the scattering device. Correspondingly, the direction of the outgoing light of the reflective scattering device is opposite to that of the incident light, and the incident light must be scattered and reflected before changing its direction to form the outgoing light, and increasing the density or thickness of the reflecting device does not reduce the efficiency, so Reflective scattering devices are a must for efficient, Lambertian scattering. In this embodiment, the reflective scattering device 240 includes a scattering layer 241, and the scattering layer 241 is provided with a scattering material. The second laser light L2 incident from the second surface 241a of the scattering device 240 can be scattered into a Lambertian distribution and also from the second Surface 241a exits. The scattering device 240 can also eliminate the coherence of the second laser light L2. The scattering material can be disposed on a reflective substrate, so that the light transmitted through the scattering material is reflected by the reflective substrate to re-enter the scattering material and be scattered.

In order to achieve a compact structure of the light emitting device, the light source module and the scattering device 240 are located on both sides of the optical path adjustment device 250, and the second laser L2 is transmitted through the optical path adjustment device to be incident on the scattering device 240; On the same side of the device 250 , the first laser light L1 is reflected by the optical path adjustment device 250 and is incident on the wavelength conversion device 230 . In this way, the light source module, the scattering device 240 and the wavelength conversion device 230 surround three sides of the optical path adjustment device 250, and the other side is used for light emission, so this structure is the most compact. However, in order to realize the normal operation of this structure, the optical path adjustment device 250 must simultaneously realize the control of the first laser light L1 and the second laser light L2, the first laser light L1 and the received laser light L3, the second laser light L1 before scattering and the second laser light L2 after scattering Splitting of three groups of rays. Due to the difference in wavelength, the first laser light L1 and the second laser light L2, the first laser light L1 and the receiving light L3 can use filters to distinguish the optical path, and the wavelength of the second laser light L2 before scattering and the second laser light L2 after scattering Similarly, the difference in wavelength cannot be used to distinguish the optical path with an optical filter.

In this embodiment, the optical path adjustment device 250 distinguishes the second laser light L2 before scattering and the second laser light L2 after scattering according to the difference in polarization state. According to relevant optical knowledge, when the light including p-polarized light and s-polarized light with vertical polarization direction is vertically incident on the filter, the stop band of the filter for p-polarized light and s-polarized light is the same, where p The polarized light is the polarized light whose polarization direction is in the plane formed by the incident direction and the reflection direction, and the s-polarized light is the polarized light whose polarization direction is perpendicular to the plane formed by the incident direction and the reflection direction. However, when the incident angle of the light containing p-polarized light and s-polarized light incident on the filter increases, due to the effect of the film layer of the filter, the stop band of the filter to light will drift to the short-wave direction, and s The stop band of polarized light will become larger than the stop band of p-polarized light, so that the transmittance curve corresponding to p-polarized light and s-polarized light will stagger by a certain distance from the edge of the pass band. As the incident angle on the filter increases, the gap between the stop band of s-polarized light and the stop-band width of p-polarized light becomes larger, and the distance between the pass-band edge of the transmittance curve corresponding to p-polarized light and s-polarized light becomes larger. big. The wavelength corresponding to the staggered position of the passband edge of the transmittance curve corresponding to the s-polarized light and the p-polarized light can be changed by the design of the film layer. Therefore, the optical path adjustment device 250 can use the different reflectivity of the filter for incident light of different polarization states to realize the distinction of the optical path between the second laser light L2 before scattering and the second laser light L2 after scattering.

Specifically, the optical path adjustment device 250 is a filter placed at 45 degrees to the incident direction of the first laser light L1. The light transmittance curve of the filter is shown in FIG. state of the second laser light, while reflecting the first laser light of 445nm and the second laser light of 462nm polarization state perpendicular to the first polarization state. Here, the first polarization state is the p-polarization state, and the polarization state perpendicular to the first polarization state is the s-polarization state.

In order to ensure that the second laser light L2 is completely transmitted through the filter 250, the second laser light L2 is set to emit in a p-polarized state. The second laser light L2 emitted from the second laser light source 220 is transmitted through the filter 250 to the scattering device 240 , and then emitted to the filter 250 after being scattered. Since the scattered second laser light L2 is in a non-polarized state, the s-polarized light in the non-polarized second laser light L2 will be reflected and deflected by 90 degrees to exit. Considering that the polarization state of the second laser light L2 is not necessarily completely disturbed after scattering, and the p-polarized light may account for more than half of the proportion, so in order to increase the ratio of the s-polarized light, the optical filter 250 and the wavelength conversion device 230 A quarter-wave plate 280 is arranged on the optical path between them to convert more than half of the p-polarized light into s-polarized light. At this time, the s-polarized light in the second laser light L2 incident on the filter 250 from the second lens 270 will be greater than 50%, and will be reflected. In addition, the quarter-wave plate 280 can also be arranged between the scattering material of the scattering device 240 and the reflective substrate, and can also play a role in converting the polarization state of the incident light.

The first laser light L1 incident on the optical filter 250 will be reflected and deflected by 90 degrees to the wavelength conversion device 230 , and excite the wavelength conversion material to generate yellow converted light L3 . The yellow received laser light L3 will be incident on the filter 250 to be transmitted and exit the same optical path as the scattered second laser light L2 in the s-polarized state.

It is worth noting that the falling edge of the actual transmittance curve of the filter often has a certain slope, and the spectral distance of the blue light of 445nm and 462nm is very close, so it is likely that the filter 250 has a certain effect on the first laser L1 and the second laser. The reflectivity or transmittance of the second laser light L2 is not 100%, but in fact, this situation will not have a great impact on the utilization ratio of the first laser light L1 and the second laser light L2. For example, when the filter is not ideal, 445nm blue light will be partially transmitted into the scattering device. Assuming that the first laser light L1 enters the wavelength conversion device 230 through the reflection of the optical filter 250, and the reflectivity is only 80%, the remaining 20% is transmitted and incident on the scattering device 240, and then incident on the optical filter 250 after scattering and reflection by the scattering device 240 , if the loss of the p-polarized light transmission filter 250 is not considered, 80% of the remaining 20%, that is, 16% of the total energy will be reflected and incident on the subsequent optical system, and only 4% of the light The extra loss is caused by being transmitted by the optical filter 250. Therefore, in fact, only most of the first laser light L1 needs to be reflected to the wavelength conversion device 230, and no large loss will be caused. The majority here refers to more than 60%. The situation of the second laser light L2 is similar to that of the first laser light L1, as long as most of the laser light is transmitted to the scattering device 240, it can be used to improve the blue light component in the outgoing light, and the lost p The proportion of the light in the polarization state to the second laser light emitted by the second laser light source 220 decreases instead.

Since the etendue of the Lambertian distribution is very large, the beam cross-sectional area of the emitted light from the wavelength conversion device 230 and the scattering device 240 will become large after propagation, so the first lens 260 and the second lens 270 need to be provided. The first lens 260 can receive the first laser light L1 emitted by the optical path adjustment device 250 and focus the first laser light L1 to the wavelength conversion device 230 , and collimate the received laser light L3 emitted by the wavelength conversion device 230 and emit it to the optical path adjustment device 230 . The second lens 270 can receive the second laser light L2 emitted by the optical path adjustment device 250 and focus the second laser light L2 to the scattering device 240 , and collimate the scattered light emitted by the scattering device 240 before outputting to the optical path adjustment device 250 .

On the other hand, in order to ensure that the sizes of the light spots incident on the surfaces of the wavelength conversion device 230 and the scattering device 240 are consistent, the first lens 260 and the second lens 270 are the same, and the first lens 260 to the wavelength conversion device 230 and the second lens 270 The optical paths to the scattering device 240 are equal. At this time, since the lasers emitted by the first laser light source 210 and the second laser light source 220 are collimated light, the first laser light L1 passes through the first lens 260 to form a spot on the surface of the wavelength conversion device 230 and the second laser light L2 passes through The spot size formed by the second lens 270 on the surface of the scattering device 240 is the same, and the light distribution of the collimated light emitted after the collected light or scattered light from the two spot areas is collected by the first lens 260 or the second lens 270 will also be the same. same.

However, whether it is the collimated light emitted by the first laser light source 210 and the second laser light source 220, or the collimated light adjusted by the first lens 260 and the second lens 270, it is impossible to achieve a divergence angle of zero. Parallel light. Here, when the incident light passes through the first lens 260 or the second lens 270, the cross-sectional area of the light beam is reduced and can all be incident on the surface of the optical path adjustment device 250, so the light beam can be considered to be collimated. Preferably, the divergence of the light beam The angle is less than or equal to 10 degrees, and the beam spread is very small at this time. Therefore, here, the optical distances of the first lens 260 and the second lens 270 are the same as those of the light adjusting device 250, so as to ensure that the collimated light emitted by the first lens 260 and the second lens 270 have the same spot size on the surface of the light adjusting device 250 .

Further, in order to make the light spots overlap on the surface of the optical filter 250, the wavelength conversion device 230 emits the collimated light through the first lens 260 and the second laser light emitted by the scattering device 240 after being collimated through the second lens 270 is filtered. The light sheets 250 are then merged into the same light path to emit, and make the combined yellow light beam L3 and the light path of the second laser light L2 overlap. For example, the optical axes of the first lens 260 and the second lens 270 may intersect at the same point on the surface of the optical filter 250 .

Therefore, through the above-mentioned light-emitting device, the light-emitting device can emit a mixed light beam of completely overlapping yellow light and blue light, and the two light intensity distributions are the same, achieving better uniform mixing. On the other hand, the light source module, the wavelength converting device 230 and the scattering device 240 are surrounded by the optical path adjusting device 250, realizing a compact structure of the light emitting device.

In addition, the arrangement structure of the first laser light source 210 and the second laser light source 220 in this embodiment does not affect the size and position of the spot on the surface of the wavelength conversion device 230 and the scattering device 240, as long as the first laser light L1 and the second laser light L2 It only needs to be able to be collected by the first lens 260 or the second lens 270 . On the other hand, the first laser light source 210 and the second laser light source 220 may not be in the same light source module, as long as they are incident on the light adjustment device 250 in the same direction, for example, the first laser light L1 and the second laser light L2 It is also possible to combine the light through a polarizer before entering the light path adjusting device 250 .

In this embodiment, the wavelength conversion device 230 further includes a driving device 233, and the driving device 233 is used to drive the movement of the wavelength conversion layer 231, so that the light spot formed by the excitation light on the wavelength conversion layer 231 acts on the wavelength conversion layer along a predetermined path. 231, so as to avoid the temperature rise of the wavelength conversion layer 231 caused by the excitation light acting on the same position of the wavelength conversion layer 231 for a long time. Specifically, in this embodiment, the driving device 233 is used to drive the wavelength conversion layer 231 to rotate, so that the light spot formed by the first laser L2 on the wavelength conversion layer 231 acts on the wavelength conversion layer 231 along a predetermined circular path. Preferably, the wavelength conversion device 230 is in the shape of a disk, the wavelength conversion layer 231 is in a ring shape concentric with the disk, the driving device 233 is a cylindrical motor, and the driving device 233 and the wavelength conversion layer 231 are coaxially fixed. In other embodiments of the present invention, the driving device 233 can also drive the wavelength conversion layer 231 to move in other ways, such as horizontal reciprocating movement and the like. In the case that the wavelength conversion material of the wavelength conversion layer 231 can withstand relatively high temperature, the wavelength conversion device 230 may not be provided with a driving device.

Similarly, the scattering device 240 may also include a driving device 242, and the driving device 242 is used to drive the movement of the scattering layer 241, so that the light spot formed by the second laser L2 on the scattering device 240 acts on the scattering device 240 along a predetermined path to avoid The heat is concentrated in the same area. In addition, in this embodiment, due to the existence of the driving device 242, the scattering layer 241 rotates, so the position of the light spot where the laser light is incident on the scattering layer 241 changes with time, so the position of the bright spot in the area projected by the light emitting device is constantly changing. Change, when the speed of this change is fast enough, the human eye cannot detect the existence of bright spots, so it has a better effect of eliminating speckle compared with a static scattering device.

In this embodiment, the positions of the wavelength conversion device 230 and the scattering device 240 can be reversed. At this time, the light transmittance curve of the optical filter 250 is shown in FIG. The second laser light in the p-polarization state of 462nm reflects the second laser light in the s-polarization state of 445nm, and the output light of the second laser light source is set to be incident on the filter in the s-polarization state. At this time, the filter 250 can also emit yellow light. The mixed light of the laser light and the second laser light in the p-polarized state.

Each embodiment in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other.

The embodiment of the present utility model also provides a projection system, including a light emitting device, and the light emitting device may have the structures and functions in the above-mentioned embodiments. The projection system can adopt various projection technologies, such as liquid crystal display (LCD, Liquid Crystal Display) projection technology, digital light path processor (DLP, Digital Light Processor) projection technology.

The above is only the embodiment of the utility model, and does not limit the patent scope of the utility model. Any equivalent structure or equivalent process transformation made by using the utility model specification and accompanying drawings, or directly or indirectly used in other Related technical fields are all included in the patent protection scope of the present utility model in the same way.

Claims (8)

1. a light-emitting device is characterized in that, comprising:

First LASER Light Source is used for outgoing first laser;

Second LASER Light Source is used for outgoing second laser;

Light path regulating device is used for receiving described first laser and second laser of same direction incident, and makes described first laser and second laser along the different light paths outgoing;

First lens are used for receiving first laser of described light path regulating device outgoing and this first laser being focused to described Wavelength converter, and the Stimulated Light of described Wavelength converter outgoing is collimated the back outgoing to described light path regulating device;

Second lens identical with described first lens are used for receiving second laser of described light path regulating device outgoing and this second laser being focused to described scattering device, and the scattered light of described scattering device outgoing is collimated the back outgoing to described light path regulating device;

Wavelength converter comprises first surface, and this first surface be used for to receive first laser of the described first lens outgoing, described Wavelength converter will described first laser be converted to Stimulated Light and with this Stimulated Light from described first surface outgoing described first lens extremely;

Scattering device comprises second surface, and described second surface be used for to receive second laser of the described second lens outgoing, and described scattering device carries out scattering to this second laser, and with second laser after the scattering from described second surface outgoing to described first lens;

Described Wavelength converter arrives the light path of described first lens and the equivalent optical path that described scattering device arrives described second lens, and described first lens, second lens arrive the equivalent optical path of described light path regulating device, the Stimulated Light of described Wavelength converter behind described first lens outgoing collimation merged into same light path outgoing with second laser of described scattering device outgoing after described second collimated behind described light path regulating device, and feasible described Stimulated Light of closing behind the light overlaps with the light path of second laser.

2. light-emitting device according to claim 1, it is characterized in that: described first LASER Light Source and second LASER Light Source are arranged at same light source module, and described first laser and the same direction outgoing of second laser.

3. light-emitting device according to claim 1, it is characterized in that: described light path regulating device is optical filter, this optical filter has described second laser and the Stimulated Light of transmission first polarization state and reflects described first laser and perpendicular to the optical characteristics of described second laser of first polarization state, perhaps, this optical filter has reflection described second laser of first polarization state and Stimulated Light and described first laser of transmission and perpendicular to the optical characteristics of described second laser of first polarization state;

And first laser of the described first LASER Light Source outgoing incides described optical filter with first polarization state.

4. light-emitting device according to claim 3, it is characterized in that: described light-emitting device also comprises a quarter-wave plate, this quarter-wave plate is between described light path regulating device and described scattering device.

5. light-emitting device according to claim 2, it is characterized in that: described light-emitting device comprises that also fly's-eye lens or fly's-eye lens are right, described fly's-eye lens or fly's-eye lens be to be used for receiving described first laser and second laser, and this first laser and second laser spare behind the light extremely described light path regulating device of outgoing.

6. light-emitting device according to claim 5 is characterized in that: the hot spot that described fly's-eye lens or fly's-eye lens shine described scattering device and Wavelength converter after to even light is the rectangle of 4:3 or 16:9.

7. light-emitting device according to claim 5, it is characterized in that: described light-emitting device also comprises dispersing lens, this dispersing lens is used for this second laser is dispersed on the light path of second laser between described fly's-eye lens or fly's-eye lens pair and described second lens.

8. an optical projection system is characterized in that, comprises as each described light-emitting device in the claim 1 to 7.

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