Double-color light source detection light path structure based on electric reflector

Abstract

The utility model discloses a double-color light source detection light path structure based on an electric reflector, when a dynamic dichroscope is located at a first working position, a blue laser beam is refracted to a fluorescent wheel through the dynamic dichroscope, and the blue laser beam is transmitted to a fluorescence excitation area of the fluorescent wheel to excite green fluorescence; the green fluorescence is reflected back to the dynamic dichroscope and then is reflected to the color filter wheel through the first electric reflector; the blue laser beam is reflected to the color filter wheel through the second electric reflector after being transmitted from the transmission area of the fluorescent wheel; when the dynamic dichroscope is located at a second working position, the blue laser beam is deflected by the dynamic dichroscope and then is reflected to the color filter wheel through the first electric reflector; the red laser beam is reflected to the color filter wheel through the second electric reflector; the light bar collects light beams transmitted by the color filter wheel. According to the utility model, the light path design under the double-color light source condition is simplified, the energy loss is reduced, and the dynamic adjustment capability of the light path structure can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of dual-color light source detection optical path structure, and specifically relates to a dual-color light source detection optical path structure based on an electric reflector, which is suitable for laser projection equipment, laser scanners, spectrum analyzers, laser display technology, automated production lines, etc. Background Art

[0002] With the development of projection technology, laser projectors have gradually become the first choice for high-end display devices. The traditional projector detection optical path structure has made significant progress in color reproduction and brightness improvement.

[0003] In order to combine the excitation light and the mixed light energy, the traditional monochromatic laser light source projection optical path structure needs to design an additional optical path for the excitation light to propagate, such as introducing a dynamic dichroic mirror to reduce the complexity of the optical path structure; in order to improve the color purity, brightness and color gamut of the traditional monochromatic light source, a two-color laser source is introduced to better meet the color requirements of laser projection. Light of different wavelengths needs to go through multiple complex reflection or transmission processes, which makes the optical path design more complicated and requires a large number of lenses, which can easily cause problems such as energy attenuation and reduced brightness. The optical path usually relies on static optical elements for fixed light control, with limited focusing ability. It is also impossible to adjust the optical path when environmental conditions or projection requirements change, and its versatility is insufficient. Summary of the Invention

[0004] In order to solve the above-mentioned problems existing in the prior art, the utility model provides a two-color light source detection optical path structure based on an electric reflector. The electric reflector is used to simplify the optical path design under two-color light source conditions, reduce energy loss, and at the same time improve the dynamic adjustment capability of the optical path structure and enhance adaptability in complex environments.

[0005] The purpose of this utility model is achieved through the following technical solutions, in conjunction with the accompanying drawings:

[0006] A dual-color light source detection optical path structure based on an electric reflector includes a dual-color laser light source, a dynamic dichroic mirror, a fluorescent wheel, a first electric reflector, a color filter wheel, a second electric reflector, and a light rod; the dual-color laser light source is used to emit a blue laser beam and a red laser beam respectively;

[0007] The dynamic dichroic mirror has two working positions:

[0008] When the dynamic dichroic mirror is in the first working position, the blue laser beam emitted by the dual-color laser light source is deflected 90 degrees by the dynamic dichroic mirror and refracted to the fluorescent wheel. The fluorescent wheel is provided with a fluorescent excitation area and a transmission area. When the blue laser beam is transmitted to the fluorescent excitation area of ​​the fluorescent wheel, green fluorescence is excited. The green fluorescence is reflected back to the dynamic dichroic mirror and reaches the first electric reflector. The first electric reflector reflects the green fluorescence to the color filter wheel. When the blue laser beam is transmitted to the transmission area of ​​the fluorescent wheel, the blue laser beam passes through the transmission area and reaches the second electric reflector. The second electric reflector reflects the blue laser beam to the color filter wheel.

[0009] When the dynamic dichroic mirror is in the second working position, the blue laser beam is deflected 90° by the dynamic dichroic mirror and reaches the first motorized reflector, which reflects the blue laser beam to the color filter wheel;

[0010] The red laser beam emitted by the dual-color laser light source is reflected to the color filter wheel by the second electric reflector;

[0011] The light rod collects the light beam transmitted by the color filter wheel.

[0012] Furthermore, it also includes a first concave lens and a first light homogenizer. The blue laser beam emitted by the dual-color laser light source is diverged by the first concave lens and then enters the first light homogenizer. After being homogenized by the first light homogenizer, it is deflected by the dynamic dichroic mirror.

[0013] Furthermore, it also includes a second concave lens and a second light homogenizer. The red laser beam emitted by the dual-color laser light source is diverged by the second concave lens and then enters the second light homogenizer. After being homogenized by the second light homogenizer, it is reflected to the color filter wheel through the second electric reflector.

[0014] Furthermore, it also includes a first condensing lens and a second condensing lens, the first condensing lens is used to focus the blue laser light refracted from the dynamic dichroic mirror, and the second condensing lens is used to focus the green fluorescent light transmitted from the dynamic dichroic mirror.

[0015] Furthermore, the fluorescence excitation area on the fluorescence wheel is coated with a fluorescent medium. When the blue laser beam is irradiated onto the fluorescence wheel, it irradiates the fluorescent medium in the fluorescence excitation area, which is excited by the fluorescent medium to produce green fluorescence. The green fluorescence is reflected from the surface of the fluorescence wheel to the first electric reflector; the transmission area on the fluorescence wheel is fully transparent glass.

[0016] Furthermore, the color filter wheel is provided with a red light diffusion area, a blue light filtering area and a green light filtering area; when the color filter wheel rotates, it sequentially transmits blue laser, red laser and green fluorescence to achieve time division of colors.

[0017] Furthermore, the first electric reflector and the second electric reflector have the same structure. The first electric reflector includes a motor, a connecting shaft and a reflector. The output end of the motor is connected to the reflector through the connecting shaft, and the motor rotates to drive the reflector to rotate at a certain angle.

[0018] Furthermore, the dual-color laser light source includes a first laser and a second laser, the first laser emits a blue laser beam, and the second laser emits a red laser beam.

[0019] The utility model has the following advantages:

[0020] The utility model provides a dual-color light source detection optical path structure based on an electric reflector, which simplifies the optical path design, thereby reducing the energy loss caused by the traditional optical path structure and improving the projection quality and stability; the adjustment ability of the optical path structure is improved by the electric reflector, and the reflection angle is adjusted according to external environmental conditions (such as ambient light, projection distance, etc.), adapting to different projection requirements and environmental changes, ensuring that light is transmitted along the optimal path, and at the same time improving the versatility of the optical path structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following is a brief introduction to the drawings to be used in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0022] Figure 1 This is a schematic diagram of the structural principle of a dual-color light source detection optical path structure based on an electric reflector according to an embodiment of the present utility model;

[0023] Figure 2 Schematic diagram of the optical path when the dynamic dichroic mirror in the embodiment of the present utility model is in the first working position;

[0024] Figure 3 Schematic diagram of the optical path when the dynamic dichroic mirror in the embodiment of the present invention is in the second working position;

[0025] In the picture:

[0026] 1-dual-color laser light source; 2-first laser; 3-second laser; 4-first concave lens; 5-first light homogenizer; 6-dynamic dichroic mirror; 7-first focusing lens; 8-fluorescent wheel; 9-first electric reflector; 11-color filter wheel; 12-second electric reflector; 15-second focusing lens; 16-second concave lens; 17-second light homogenizer; 19-light rod. DETAILED DESCRIPTION

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0028] In the description of this embodiment, the terms "first" and "second" are only used to distinguish in the description and have no special meanings.

[0029] Example

[0030] like Figures 1 to 3 As shown, this embodiment is a two-color light source detection optical path structure based on an electric reflector, including a two-color laser light source 1, a first concave lens 4, a first light homogenizer 5, a dynamic dichroic mirror 6, a first focusing lens 7, a fluorescent wheel 8, a first electric reflector 9, a color filter wheel 11, a second electric reflector 12, a second focusing lens 15, a second concave lens 16, a second light homogenizer 17 and a light rod 19; the two-color laser light source 1 includes a first laser 2 and a second laser 3, the first laser 2 emits a blue laser beam, and the second laser 3 emits a red laser beam.

[0031] The dual-color laser light source 1 is used to emit a blue laser beam and a red laser beam respectively;

[0032] The blue laser beam is diverged by the first concave lens 4 and then enters the first light homogenizer 5. After being homogenized by the first light homogenizer, it is deflected by the dynamic dichroic mirror 6.

[0033] The dynamic dichroic mirror 6 has two working positions: when the dynamic dichroic mirror 6 is in the first working position, Figure 2 As shown, the blue laser beam is deflected 90 degrees by the dynamic dichroic mirror 6 to the first condensing lens 7, and then refracted by the first condensing lens 7 to the fluorescent wheel 8. The fluorescent wheel 8 is provided with a fluorescent excitation area and a transmission area. When the blue laser beam is transmitted to the fluorescent excitation area of ​​the fluorescent wheel 8, green fluorescence is excited. After the green fluorescence is reflected back to the dynamic dichroic mirror, it is concentrated by the second condensing lens 15 and reaches the first electric reflector 9. The first electric reflector 9 reflects the green fluorescence to the color filter wheel 11; when the blue laser beam is transmitted to the transmission area of ​​the fluorescent wheel 8, the blue laser beam passes through the transmission area and reaches the second electric reflector 12. The second electric reflector 12 reflects the blue laser beam to the color filter wheel 11; when the dynamic dichroic mirror 6 is in the second working position, as shown Figure 3 As shown, the blue laser beam is deflected 90° by the dynamic dichroic mirror 6 to the second condenser lens 7, and then focused by the second condenser lens 7 to reach the first electric reflector 9, which reflects the blue laser beam to the color filter wheel 11;

[0034] The red laser beam is diverged by the second concave lens 16 and then enters the second light homogenizer 17. After being homogenized by the second light homogenizer 17, it is reflected by the second electric reflector 12 to the color filter wheel 11.

[0035] The light rod 19 collects the light beam transmitted by the color filter wheel 11 , improves the laser brightness and guides the light beam to enter the subsequent path stably.

[0036] In this embodiment, the first concave lens 4 receives the blue laser beam emitted by the first laser 2 and diverges it, and the second concave lens 16 receives the red laser beam emitted by the second laser 3 and diverges it, thereby avoiding the generation of an overly concentrated beam in the optical path and allowing the beam to better enter subsequent components.

[0037] In this embodiment, the first light homogenizer 5 receives the blue laser beam diverged by the first concave lens 4, and the second light homogenizer 17 receives the red laser beam diverged by the second concave lens 16, thereby improving the uniformity of the beam and enhancing the fault tolerance of the optical path structure.

[0038] In this embodiment, the first condenser lens 7 and the second condenser lens 15 are used to focus the light beam transmitted from the dichroic mirror. Because the beam diffusion angle of light transmitted or reflected by the dichroic mirror is greater than the collection angle of the light rod, it will result in low light reception efficiency and affect the brightness of the projection light source. The first condenser lens 7 is used to focus the blue laser light refracted by the dichroic mirror, and the second condenser lens 15 is used to focus the green fluorescent light transmitted from the dichroic mirror.

[0039] In this embodiment, the fluorescent wheel 8 is provided with a fluorescent excitation area and a transmission area. The fluorescent excitation area is coated with a fluorescent medium, and the transmission area is fully transparent glass. When a blue laser beam is irradiated onto the fluorescent wheel, it happens to irradiate the fluorescent medium in the fluorescent excitation area, which is excited by the fluorescent medium to produce green fluorescence. The green fluorescence is reflected from the surface of the fluorescent wheel 8 to the second condensing lens 15, and after being focused by the lens, it reaches the first electric reflector 9.

[0040] In this embodiment, the color filter wheel 11 is provided with a red light diffusion region, a blue light filter region, and a green light filter region. When the color filter wheel 11 rotates, it sequentially transmits blue laser light, red laser light, and green fluorescence, achieving time division of the colors. This enhances color reproduction and projects pure monochromatic light.

[0041] In this embodiment, the first electric reflector 9 and the second electric reflector 12 have the same structure. The first electric reflector 9 includes a motor, a connecting shaft and a reflector. The output end of the motor is connected to the reflector through the connecting shaft, and the motor rotates to drive the reflector to rotate at a certain angle.

[0042] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dual-color light source detection optical path structure based on an electric reflector, characterized in that: It includes a two-color laser light source, a dynamic dichroic mirror, a fluorescent wheel, a first electric reflector, a color filter wheel, a second electric reflector and a light rod; the two-color laser light source is used to emit a blue laser beam and a red laser beam respectively; The dynamic dichroic mirror has two working positions: When the dynamic dichroic mirror is in the first working position, the blue laser beam emitted by the dual-color laser light source is deflected 90 degrees by the dynamic dichroic mirror and refracted to the fluorescent wheel. The fluorescent wheel is provided with a fluorescent excitation area and a transmission area. When the blue laser beam is transmitted to the fluorescent excitation area of ​​the fluorescent wheel, green fluorescence is excited. The green fluorescence is reflected back to the dynamic dichroic mirror and reaches the first electric reflector. The first electric reflector reflects the green fluorescence to the color filter wheel. When the blue laser beam is transmitted to the transmission area of ​​the fluorescent wheel, the blue laser beam passes through the transmission area and reaches the second electric reflector. The second electric reflector reflects the blue laser beam to the color filter wheel. When the dynamic dichroic mirror is in the second working position, the blue laser beam is deflected 90° by the dynamic dichroic mirror and reaches the first motorized reflector, which reflects the blue laser beam to the color filter wheel; The red laser beam emitted by the dual-color laser light source is reflected to the color filter wheel by the second electric reflector; The light rod collects the light beam transmitted by the color filter wheel.

2. The dual-color light source detection optical path structure based on an electric reflector according to claim 1, characterized in that: It also includes a first concave lens and a first light homogenizer. The blue laser beam emitted by the dual-color laser light source is diverged by the first concave lens and then enters the first light homogenizer. After being homogenized by the first light homogenizer, it is deflected by the dynamic dichroic mirror.

3. The dual-color light source detection optical path structure based on an electric reflector according to claim 1, characterized in that: It also includes a second concave lens and a second light homogenizer. The red laser beam emitted by the dual-color laser light source is diverged by the second concave lens and then enters the second light homogenizer. After being homogenized by the second light homogenizer, it is reflected to the color filter wheel through the second electric reflector.

4. The dual-color light source detection optical path structure based on an electric reflector according to claim 1, characterized in that: The first condenser lens is used to focus the blue laser light refracted from the dynamic dichroic mirror, and the second condenser lens is used to focus the green fluorescent light transmitted from the dynamic dichroic mirror.

5. The dual-color light source detection optical path structure based on an electric reflector according to claim 1, characterized in that: The fluorescence excitation area on the fluorescence wheel is coated with a fluorescent medium. When the blue laser beam is irradiated onto the fluorescence wheel, it irradiates the fluorescent medium in the fluorescence excitation area, which is excited by the fluorescent medium to produce green fluorescence. The green fluorescence is reflected from the surface of the fluorescence wheel to the first electric reflector; the transmission area on the fluorescence wheel is fully transparent glass.

6. The dual-color light source detection optical path structure based on an electric reflector according to claim 1, characterized in that: The color filter wheel is provided with a red light diffusion area, a blue light filtering area and a green light filtering area; when the color filter wheel rotates, it sequentially transmits blue laser, red laser and green fluorescence to achieve time division of colors.

7. The dual-color light source detection optical path structure based on an electric reflector according to claim 1, characterized in that: The first electric reflector and the second electric reflector have the same structure. The first electric reflector includes a motor, a connecting shaft and a reflector. The output end of the motor is connected to the reflector through the connecting shaft, and the motor rotates to drive the reflector to rotate at a certain angle.

8. The dual-color light source detection optical path structure based on an electric reflector according to claim 1, characterized in that: The dual-color laser light source includes a first laser and a second laser, the first laser emits a blue laser beam, and the second laser emits a red laser beam.

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