CN211528895U - Light source adjusting device, light source system and projection system - Google Patents
Light source adjusting device, light source system and projection system Download PDFInfo
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- CN211528895U CN211528895U CN202020431238.0U CN202020431238U CN211528895U CN 211528895 U CN211528895 U CN 211528895U CN 202020431238 U CN202020431238 U CN 202020431238U CN 211528895 U CN211528895 U CN 211528895U
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Abstract
The utility model discloses a light source adjusting device, include: the adjusting lens is used for adjusting the direction of the light emitted by the light source; the dichroic mirror is used for receiving and reflecting the light rays adjusted by the adjusting lens; a wavelength conversion device; and a first lens unit for converging the light reflected by the dichroic mirror onto the wavelength conversion device. The utility model also discloses a light source system and projection system. The utility model discloses can reach the purpose that the adjustment incides the last receiving point facula size of wavelength conversion equipment and position through the adjustment lens.
Description
Technical Field
The utility model relates to a light source technical field, concretely relates to light source adjusting device, light source system and projection system.
Background
The laser light source used by the current laser projector mainly goes through single lamp, 8 lamp (Bank), and multi-lamp array (MCL). The increase in the number of lamps makes the design simple and the light source becomes smaller in size. However, as the number of lamps in an array increases, variations in materials and assembly have a significant effect on brightness. Assuming that 24 laser lamps are required for the light source, when a single lamp is adopted, even if 2 lamps are assembled, the overall brightness is not greatly influenced; when a Bank is adopted, 4 groups are needed, and when one group has a certain deviation, the weight is only 25%; when MCL is used, only one is needed, and when a problem occurs, it is 100% problematic. When MCL is used in the light source, variations in assembly and materials can cause large fluctuations in brightness; especially when two or more MCLs are used in the same light source, the deviation of any one of them cannot be adjusted by conventional methods.
A conventional laser light source system is shown in fig. 1 and 2, and mainly includes a light source 1, a convex lens 2, a concave lens 3, a scattering sheet 4, a dichroic mirror 5, a condenser lens group 6, a wavelength conversion device 7, a condenser lens system 8, and a light rod system 9. The working principle is as follows: the exciting light emitted by the light source 1 is contracted through a shaping lens consisting of a convex lens 2 and a concave lens 3, is scattered through a scattering sheet 4, is reflected through a dichroic mirror 5, is condensed by a condensing lens group 6, reaches a wavelength conversion device 7 for wavelength conversion to generate received laser, and is condensed into an optical rod system 9 through the condensing lens group 6, the dichroic mirror 5 and a condensing lens system 8 in sequence. Wherein A is a light spot of exciting light incident on the wavelength conversion device 6, and B is a light spot of the excited light on the light bar system 9; the laser light source system requires that the B spot be as accurately incident into the light bar system 9 as possible.
To achieve this, the currently common adjustment methods are:
the position of the condensing lens group 6 is adjusted, and the positions and the sizes of light spots can be adjusted by adjusting the front, the back, the left and the right. Wherein fig. 3 is a front-back (vertical) adjustment and fig. 4 is a left-right (horizontal) adjustment.
The above adjustment has a high requirement for the consistency of the light emitting directions of the sub-light sources of the light source 1, and when the angles of the sub-light sources deviate by more than 0.3 °, the adjustment of the method is disabled. As shown in fig. 5, although the coincidence of the excitation spots can still be satisfied after the condenser lens group 6 is adjusted back and forth, up and down, left and right, the spots are not on the optical axis of the condenser lens group 6, so that the image spots B cannot enter the optical rod, and the efficiency is reduced.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, an object of the present invention is to provide a light source adjusting device, which can adjust the size and position of the spot incident on the wavelength conversion device by adjusting the lens.
The utility model discloses an one of the purpose adopts following technical scheme to realize:
a light source adjustment apparatus, comprising:
the adjusting lens is used for adjusting the direction of the light emitted by the light source;
the dichroic mirror is used for receiving and reflecting the light rays adjusted by the adjusting lens;
a wavelength conversion device; and the number of the first and second groups,
and a first lens unit for converging the light reflected by the dichroic mirror onto the wavelength conversion device.
The position or/and shape of the light spot incident on the wavelength conversion device is changed by adjusting the adjustment mirror or/and the adjustment component, which is the first lens unit or/and the wavelength conversion device.
Further, the number of the adjusting lenses is at least one.
Further, the adjustment of the adjusting lens is a deflection adjustment of any angle and/or a movement adjustment of any direction.
Further, the adjustment of the first lens unit is a movement adjustment in an arbitrary direction.
Further, the wavelength conversion device is adjusted to be movable in any direction.
Further, the light source is an array light source.
Further, the number of the adjusting lenses is matched with the number of the light sources.
Further, the adjusting lens is a reflector or a filter.
Further, the light source adjusting device further comprises a shaping mirror group, the shaping mirror group comprises a second lens unit, a third lens unit and a scattering sheet, the adjusting lens is located in the light incident direction of the second lens unit, the third lens unit is used for forming collimated light beams from the light emitted by the second lens unit, and the collimated light beams are scattered by the scattering sheet and then irradiate onto the dichroic mirror.
A second object of the present invention is to provide a light source system, which can adjust the size and position of the excitation spot incident on the wavelength conversion device through the adjustment lens, so as to achieve the highest excitation efficiency.
The second purpose of the utility model is realized by adopting the following technical scheme:
a light source system comprises a laser light source and a light source adjusting device which is one of the purposes of the utility model; the laser light source is used for generating exciting light; the light source system also comprises a fourth lens unit and a light bar system, and the wavelength conversion device receives the exciting light converged by the first lens unit and performs wavelength conversion on the exciting light to generate stimulated light; the received laser light is converged by the first lens unit and transmitted by the dichroic mirror in sequence, and then converged to the light bar system by the fourth lens unit.
A third object of the present invention is to provide a projection system, which includes the second object of the present invention.
Compared with the prior art, the beneficial effects of the utility model reside in that:
the utility model discloses a direction adjustment (the position adjustment that combines first lens unit or/and wavelength conversion device when necessary) of adjustment lens reaches the purpose that the adjustment incides the last accepting point facula size of wavelength conversion device and position to in being applied to laser light source system or projection system, make excitation efficiency the highest.
Drawings
Fig. 1 is a structural diagram of a conventional laser light source system;
fig. 2 is a structural diagram of an adjustment method of a conventional laser light source system;
FIG. 3 is a diagram illustrating a first adjustment state of a conventional laser light source system;
FIG. 4 is a diagram illustrating a second adjustment mode of a conventional laser light source system;
fig. 5 is a structural diagram of a third adjustment state of a conventional laser light source system;
fig. 6 is a schematic structural diagram of a light source adjustment apparatus according to a first embodiment of the present invention;
fig. 7 is a schematic structural diagram of a light source system according to a second embodiment of the present invention.
Fig. 8 is a schematic structural diagram of a first adjustment state of a light source system according to a second embodiment of the present invention;
fig. 9 is a schematic structural diagram of a second adjustment state of the light source system according to the second embodiment of the present invention.
In the figure: 1. a light source; 2. a convex lens; 3. a concave lens; 4. a scattering sheet; 5. a dichroic mirror; 6. a condenser lens group; 7. a wavelength conversion device; 8. a converging lens system; 9. a light bar system; 10. a light source; 11. a laser light source; 21. a second lens unit; 22. a third lens unit; 23. a scattering sheet; 30. a dichroic mirror; 40. a first lens unit; 51. a wavelength conversion device; 52. a fourth lens unit; 53. a light bar system; 60. adjusting the lens; 70. and adjusting the lens.
Detailed description of the preferred embodiments
The present invention will be further described with reference to the accompanying drawings and specific embodiments, and it should be noted that the embodiments or technical features described below can be arbitrarily combined to form a new embodiment without conflict. Except as specifically noted, the materials and equipment used in this example are commercially available.
Example one
Referring to fig. 6, a light source adjusting apparatus includes an adjusting lens, a dichroic mirror 30, a first lens unit 40, and a wavelength conversion device 51; the first lens unit converges the light reflected by the dichroic mirror onto the wavelength conversion device, and the direction of the adjusting lens is adjusted so that the position or/and the shape of a light spot incident on the wavelength conversion device are changed.
In some cases, it may also be desirable to adjust the distance of the wavelength conversion device relative to the first lens unit, which may be achieved by adjusting the position of the first lens unit or/and the wavelength conversion device, referred to herein as the adjustment assembly, which may adjust the distance of the wavelength conversion device relative to the first lens unit.
The adjustment of the adjusting lens can be realized by moving the adjusting lens in any direction or rotating the adjusting lens by any angle. The adjustment of the adjustment assembly may be a front-back adjustment of any or all of the components, or a left-right adjustment, i.e. the position of the first lens unit or/and the wavelength conversion device may be moved in any direction to achieve the purpose of adjustment, where the front-back adjustment is mainly to adjust the position of the first lens unit or/and the wavelength conversion device to adjust the distance therebetween, and the left-right adjustment is a vertical direction of the front-back adjustment, i.e. the distance between the two is not changed, but the relative position is changed.
The adjustment of the direction of the adjusting lens and the position of the adjusting component are adjusted according to the required spot position or/and shape when the adjusting component is delivered from a factory.
The external light sources are preferably light source arrays, each light source array may correspond to one adjustment lens (in the present invention, two light source arrays are taken as an example, and then the adjustment lens 60 and the adjustment lens 70 correspond to each other), and of course, in some cases, one adjustment lens may correspond to a plurality of light source arrays. The adjusting lens can adopt a reflector or a filter.
As the utility model discloses the embodiment of preferred sets up the plastic mirror group between adjustment lens and dichroic mirror 30 for guaranteeing the light-emitting effect, and this plastic mirror group can be second lens unit 21, third lens unit 22 and diffuser 23, and the light of adjustment lens reflection is via the second lens unit convergence back, by third lens unit compression stroke collimated light beam again, shine to the dichroic mirror after the scattering of collimated light beam rethread diffuser on. The second lens unit may be a convex lens, or a combination of convex lenses, and the third lens unit may be one or more concave lenses, which are arranged in a confocal manner when one convex lens and one concave lens are used. The diffusion sheet plays a role of diffusion.
Example two
The second embodiment is to build a light source system by using the light source adjusting device of the first embodiment. The light source system is a laser light source system, as shown in fig. 7, and includes a laser light source 11, a fourth lens unit 52, a light bar system 53 and the light source adjusting device; the laser light source is used for generating exciting light; the wavelength conversion device 51 receives the excitation light condensed by the first lens unit and performs wavelength conversion on the excitation light to generate stimulated light; the received laser light is converged by the first lens unit and transmitted by the dichroic mirror in sequence, and then converged to the light bar system by the fourth lens unit.
The laser light source is one or more laser arrays, each laser array can correspond to one adjusting lens, and if necessary, one adjusting lens can correspond to a plurality of laser arrays.
By the light source adjusting system, the size and the position of the light spot (C light spot in fig. 7) of the excitation light on the wavelength conversion device can be adjusted, so that the excitation efficiency can be adjusted.
Similar to the prior art, the wavelength conversion device is a wheel disc structure, but a cylindrical structure (the front and back adjustment is axial adjustment along the wheel disc, and the left and right adjustment is radial adjustment along the wheel disc) can be adopted. The wavelength conversion device is controlled by a rotating mechanism, and the rotating mechanism drives the wavelength conversion device to rotate along a central shaft of the wavelength conversion device. The upper surface of the wavelength conversion device is provided with one or more wavelength conversion sub-sections on which wavelength conversion material is disposed. And rotating the wavelength conversion device as required, so that the exciting light generates corresponding stimulated light in the corresponding wavelength conversion subarea, and then the stimulated light is incident to the optical rod system through the dichroic mirror and the fourth lens unit.
As shown in fig. 8, in order to adjust the optical path diagram after the light spot, the normal light spot is as shown in fig. 6, and the laser light spot (C light spot) is very small and is at the focus of the two groups of sub light sources. After the adjustment of fig. 8, the size of the light spot is much larger than the size of the light spot at the position of the focal point, and when the power of the laser is increased, the adjustment of the size of the C light spot can be realized only by adjusting the distance between the wavelength conversion device 51 and the first lens unit 40 when assembled, and then adjusting the positions of the adjustment lens 60 and the adjustment lens 70.
When the assembly tolerance or material tolerance of other optical elements causes the deviation of the light spot D, the light source system can also be adjusted, as shown in fig. 9, and if the position of the light spot is required to move to the left, the position of the C light spot is adjusted by adjusting the positions of the adjusting lens 60 and the adjusting lens 70 so that the position of the excitation light spot deviates to the required direction. As long as the wavelength conversion material area of the wavelength conversion device is large enough and the light spot does not deviate from the wavelength conversion material area, the wavelength conversion device does not need to be moved left and right, and if the area is not large enough, the wavelength conversion device needs to be moved to allow the light spot to fall on the wavelength conversion material area.
The utility model discloses specially adapted two and more than two MCL (array light source)'s light source realizes the adjustment to arousing facula size and position through the adjustment to array light source light-emitting direction, especially when the MCL power increases the time, the increase of power density can lead to the wavelength conversion material to arouse the decline of efficiency, needs the adjustment facula size of every machine pertinence.
The utility model discloses simple structure can realize the independent adjustment to every MCL, reaches facula position and the while adjustment of size, has great help to light source system's efficiency and wavelength conversion device's promotion of arousing efficiency. The traditional mode of adjusting the first lens unit or the fourth lens unit is abandoned, the number of the adjusted parts is reduced, and the difficulty is reduced.
EXAMPLE III
The third embodiment discloses a projection system (i.e., a laser projector) including the light source system of the second embodiment. The light source system can be flexibly arranged in the projection system after the people skilled in the art understand the present invention, and the detailed description is omitted. Of course, the projection system may employ various projection technologies, such as Liquid Crystal Display (LCD) projection technology, Digital Light Processing (DLP) projection technology.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are all within the protection scope of the present invention.
Claims (10)
1. A light source adjustment device, comprising:
the adjusting lens is used for adjusting the direction of the light emitted by the light source;
the dichroic mirror is used for receiving and reflecting the light rays adjusted by the adjusting lens;
a wavelength conversion device; and the number of the first and second groups,
and a first lens unit for converging the light reflected by the dichroic mirror onto the wavelength conversion device.
2. The light source adjustment device of claim 1, wherein the number of the adjustment lenses is at least one.
3. The light source adjustment device of claim 2, wherein the adjustment of the adjustment lens is a deflection adjustment of any angle and/or a movement adjustment of any direction.
4. The light source adjustment apparatus of claim 1, wherein the adjustment of the first lens unit is a movement adjustment in an arbitrary direction.
5. The light source adjustment device of claim 1, wherein the light source is an array light source.
6. The light source adjusting apparatus according to claim 5, wherein the number of the adjusting lens is adapted to the number of the light sources.
7. The light source adjusting device of claim 1, wherein the adjusting lens is a reflector or a filter.
8. The light source adjustment device according to any one of claims 1 to 7, further comprising a shaping mirror group including a second lens unit, a third lens unit and a scattering sheet, wherein the adjustment mirror is located in the light incident direction of the second lens unit, and the third lens unit is configured to form the light emitted from the second lens unit into a collimated light beam, and the collimated light beam is scattered by the scattering sheet and then irradiated onto the dichroic mirror.
9. A light source system, comprising a laser light source, and the light source adjustment device according to any one of claims 1 to 8; the laser light source is used for generating exciting light; the light source system also comprises a fourth lens unit and a light bar system, and the wavelength conversion device receives the exciting light converged by the first lens unit and performs wavelength conversion on the exciting light to generate stimulated light; the received laser light is converged by the first lens unit and transmitted by the dichroic mirror in sequence, and then converged to the light bar system by the fourth lens unit.
10. A projection system comprising the light source system of claim 9.
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| CN202020431238.0U CN211528895U (en) | 2020-03-30 | 2020-03-30 | Light source adjusting device, light source system and projection system |
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| CN202020431238.0U CN211528895U (en) | 2020-03-30 | 2020-03-30 | Light source adjusting device, light source system and projection system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114613253A (en) * | 2020-12-09 | 2022-06-10 | 成都极米科技股份有限公司 | Optical system and display device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114613253A (en) * | 2020-12-09 | 2022-06-10 | 成都极米科技股份有限公司 | Optical system and display device |
| CN114613253B (en) * | 2020-12-09 | 2024-01-23 | 极米科技股份有限公司 | Optical system and display device |
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