CN211315851U - Spectrum adjustable light source - Google Patents
Spectrum adjustable light source Download PDFInfo
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- CN211315851U CN211315851U CN201922288104.8U CN201922288104U CN211315851U CN 211315851 U CN211315851 U CN 211315851U CN 201922288104 U CN201922288104 U CN 201922288104U CN 211315851 U CN211315851 U CN 211315851U
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Abstract
The utility model discloses a spectrum adjustable light source, which comprises a light source module, a light splitting module, a spectrum selection module and a light mixing module, wherein light beams emitted by the light source module exit after passing through the light splitting module, the spectrum selection module and the light mixing module in sequence; the light source module, the light splitting module and the spectrum selection module are in a plurality of groups, wherein the light source module, the light splitting module and the spectrum selection module respectively modulate light beams with different or overlapped wave bands; the light beams generated by the multiple groups of light source modules, the light splitting module and the spectrum selection module are simultaneously emitted into the same light mixing module. The spectrum adjustable light source can obtain a light source capable of adjusting spectrum information randomly, and each waveband has a balanced and excellent modulation effect.
Description
Technical Field
The utility model relates to the field of lighting, concretely relates to adjustable light source of spectrum.
Background
The light source is divided into a natural light source and an artificial light source. Common natural light sources include sunlight, moonlight and the like, the types of artificial light sources are more abundant, the artificial light sources comprise a thermal radiation or temperature radiation light source, a gas discharge light source, a solid light emitting light source, a laser and the like, and the spectrum refers to a spectrum in which monochromatic light dispersed after skin color light is dispersed is arranged according to the wavelength.
At present, the spectral composition of most artificial light sources is limited by self luminescent substances, the spectral adjustable range of the obtained artificial light source has certain limitation, and the spectral information of single-wavelength light cannot be randomly combined and adjusted; secondly, when the light beam is dispersed, different types of dispersion elements have respective advantages and disadvantages, for example, a prism as a dispersion element has less loss on energy transmission, but has weaker dispersion capability in red light and infrared light bands than other bands; for example, although the dispersion capability of the grating is balanced in each band, the energy loss is large. Therefore, how to obtain a light source capable of arbitrarily adjusting spectral information, and each band has a balanced and excellent modulation effect is an urgent technical problem to be solved.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art, the utility model provides an adjustable light source of spectrum aims at solving the technical problem of the modulation effect imbalance of each wave band of the adjustable light source of spectrum among the prior art.
The utility model discloses a spectrum adjustable light source, which comprises a light source module, a light splitting module, a spectrum selection module and a light mixing module, wherein light beams emitted by the light source module exit after passing through the light splitting module, the spectrum selection module and the light mixing module in sequence; the light source module, the light splitting module and the spectrum selection module are in a plurality of groups, wherein the light source module, the light splitting module and the spectrum selection module respectively modulate light beams with different or overlapped wave bands; the light beams generated by the multiple groups of light source modules, the light splitting module and the spectrum selection module are simultaneously emitted into the same light mixing module.
The utility model discloses a light source with adjustable spectrum, through setting up the light splitting module, disperse the light beam of light source module into single wavelength, later through the light spectrum selection module with the light of required wavelength reflect out and enter the optical mixing module and obtain the required light source; meanwhile, when the single light splitting module carries out light beam dispersion, the dispersion capability at different wavelengths is different, and the light splitting module transmits light source energy, so that a plurality of groups of light source modules, light splitting modules and spectrum selection modules are arranged on the basis of light source adjustability. The modulated wave bands are divided according to the light splitting characteristics of the light splitting module, and the light beams with the wave bands divided are further selected by the multiple groups of light source modules, the light splitting module and the spectrum selection module respectively and then are simultaneously injected into the same light mixing module to be mixed, so that the light source with the required adjustable spectrum information is obtained.
In some optional embodiments, a first color filter is disposed between the light source module and the light splitting module of each group, and the first color filters disposed in each group cover different or overlapping wavelength bands. For example, covering 400-600nm, 600-740nm, etc. The light beam wave bands entering the light splitting module are divided by the arrangement of the color filter, so that the light beams of different wave bands are respectively modulated by the multiple groups of light source modules, the light splitting module and the spectrum selection module.
In some alternative embodiments, the light source module includes a spectrally continuous light source and a slit.
In some alternative embodiments, the plurality of sets of the light splitting modules respectively include the same or different dispersion units.
Optionally, the dispersion unit is a prism, a grating or a color chip.
Preferably, the dispersion units corresponding to the multi-component optical module are a prism and a grating respectively. The prism as a dispersion unit has better energy transmission, the energy loss of light beams passing through the prism is less, but the dispersion capability of the prism in red light and infrared light is not ideal; in contrast, the dispersion capability of the grating is more balanced at each wavelength, but the energy loss is slightly greater than for the prism. In summary, when the multi-component optical module disperses the light beam, a group of gratings can be arranged, which mainly relates to dispersion of red and/or infrared bands; and the other group is provided with prisms for dispersing wave bands except red and infrared so as to achieve the optimal dispersion effect of each wave band, thereby optimizing the precision and accuracy of the obtained light source.
In some optional embodiments, the light splitting module further includes a first lens unit and a second lens unit, and the first lens unit, the dispersion unit, and the second lens unit are sequentially disposed. The first lens unit is a collimating lens, collimates the light beam of the light source module, the dispersion unit disperses the light according to the wavelength, and then the light is imaged into the subsequent light path module through the second lens unit.
In some optional embodiments, the light splitting module is a concave grating. The concave grating has the capabilities of collimation, dispersion and imaging focusing at the same time, and is favorable for simplifying the setting of a light path.
In some alternative embodiments, the spectral selection module is a digital micromirror device. The digital micromirror device comprises a plurality of reflecting mirror plates which are arranged in an array, wherein the reflecting mirror plates can rotate around a fixed rotating shaft to be closed or opened. Specifically, the light beams of the respective wavelengths split by the splitting module are arranged on the receiving surface of the digital micromirror device in a wavelength sequence, and the light beams of the respective wavelengths are selected by controlling the rotation (i.e., turning on or off) of the reflecting mirror.
In some optional embodiments, the light mixing module comprises an integrating sphere. The integrating sphere is a hollow sphere with the inner wall coated with a white diffuse reflection material, light is collected by the integrating sphere through a window arranged on the integrating sphere, and is scattered in the integrating sphere uniformly after being reflected for multiple times in the integrating sphere, so that an emergent light beam which is mixed uniformly can be obtained.
In particular, the integrating sphere further comprises a number of windows, such as an entrance window, a sampling window or an exit window, for receiving the light beam, sampling or outputting the light beam.
In some optional embodiments, the optical system further comprises a third lens, and the light beam of the light splitting module is coupled to the light mixing module through the third lens. The third lens couples the emergent light beam of the spectrum selection module to the integrating sphere, and the integrating sphere uniformly mixes the light beams with various wavelengths and then emits the light beams.
In some optional embodiments, a second color filter is further disposed in the optical path of the third lens and the light mixing module. The second color filter is used for removing stray light inside or in the environment and optimizing the light source result.
In some optional embodiments, the light mixing module further comprises a photodetector. The photoelectric detector is used for detecting the light source mixing condition in the light mixing module.
Specifically, the photoelectric detector is a spectrometer, and the light mixing module comprises an integrating sphere. The spectrometer monitors and analyzes the spectral irradiance and the spectral distribution in the integrating sphere through a sampling window arranged on the integrating sphere.
In some optional embodiments, the optical spectrum selection module is further provided with an optical trap near the emergent light path. The light trap is used for absorbing stray light in the environment and preventing the stray light from entering the light mixing module to influence the light source result.
Drawings
Fig. 1 is a schematic structural diagram of a spectrum-tunable light source provided in an embodiment of the present invention;
fig. 2 is a schematic light path diagram of a spectrum-tunable light source provided in an embodiment of the present invention;
fig. 3 is a schematic light path diagram of another spectrally tunable light source provided by an embodiment of the present invention;
fig. 4 is a schematic light path diagram of another spectrum tunable light source provided in the embodiment of the present invention.
Detailed Description
Example 1
The utility model provides a spectrum adjustable light source, as shown in figure 1, comprising a light source module 1, a light splitting module 2, a spectrum selection module 3 and a light mixing module 4; the light beam emitted by the light source module 1 is emitted after sequentially passing through the light splitting module 2, the spectrum selection module 3 and the light mixing module 4; the light source module 1, the light splitting module 2 and the spectrum selection module 3 are in multiple groups, wherein the multiple groups of light source module 1, the light splitting module 2 and the spectrum selection module 3 respectively modulate light beams with different or overlapped wave bands; the light beams generated by the multiple light source modules 1, the light splitting module 2 and the spectrum selection module 3 are simultaneously emitted into the same light mixing module 4. The multi-group light source module 1 comprises light source modules 1-1 … … and light source modules 1-n, the multi-component light module 2 comprises a light splitting module 2-1 … … and a light splitting module 2-n, and the multi-group spectrum selection module 3 comprises a spectrum selection module 3-1 … … and a spectrum selection module 3-n, wherein n is an integer greater than or equal to 2.
Example 2
As shown in fig. 2, for the light source with adjustable spectrum provided by the present invention, the light source comprises a set of light source module 1-1, light splitting module 2-1 and spectrum selecting module 3-1, wherein a first color filter 11-1 is further disposed between the light source module 1-1 and the light splitting module 2-1; and another group of light source module 1-2, light splitting module 2-2 and spectrum selection module 3-2, wherein a first color filter 11-2 is arranged between the light source module 1-2 and the light splitting module 2-2. The first color filter 11-1 and the first color filter 11-2 overlap covering wavelength bands. The two sets of arrangements respectively modulate the light beams with overlapped wave bands, and then simultaneously emit the light beams into the same light mixing module 4. The light source module 1-1 (1-2) includes a light source 13 and a slit 12 which are spectrally continuous. The spectral module 2-1 (2-2) includes a first lens unit 21, a dispersion unit 22-1 (22-2), and a second lens unit 23. The dispersion unit 22-1 and the dispersion triad 22-2 are prisms, and the coverage wavelength bands correspond to the first color filter 11-1 and the first color filter 11-2, respectively. The light beam of the spectrum selection module 3-1 (3-2), which is a digital micromirror device spectrum selection module 3-1 (3-2), is coupled to the light mixing module 4 through the third lens unit 41. The light-mixing module 4 is an integrating sphere, which further comprises an exit window 46.
Example 3
As shown in fig. 3, for the light source with adjustable spectrum provided by the present invention, the light source comprises a set of light source module 1-1, light splitting module 2-1 and spectrum selecting module 3-1, wherein a first color filter 11-1 is further disposed between the light source module 1-1 and the light splitting module 2-1; and another group of light source module 1-2, light splitting module 2-2 and spectrum selection module 3-2, wherein a first color filter 11-2 is arranged between the light source module 1-2 and the light splitting module 2-2. The first color filter 11-1 and the first color filter 11-2 overlap covering wavelength bands. The two sets of arrangements respectively modulate the light beams with overlapped wave bands, and then simultaneously emit the light beams into the same light mixing module 4. The light source module 1-1 (1-2) includes a light source 13 and a slit 12 which are spectrally continuous. The light splitting module 2-1 comprises a first lens unit 21, a dispersion unit 22 and a second lens unit 23, wherein the dispersion unit 22 is a prism; the light splitting module 2-2 is a concave grating. The spectrum selection module 3-1 (3-2) is a digital micromirror device. The light beams of the spectrum selection module 3-1 (3-2) are coupled to the light mixing module 4 through the third lens unit 41. The light-mixing module 4 is an integrating sphere, which further comprises an exit window 46.
Example 4
As shown in fig. 4, for the light source with adjustable spectrum provided by the present invention, the light source comprises a set of light source module 1-1, light splitting module 2-1 and spectrum selecting module 3-1, wherein a first color filter 11-1 is further disposed between the light source module 1-1 and the light splitting module 2-1; and another group of light source module 1-2, light splitting module 2-2 and spectrum selection module 3-2, wherein a first color filter 11-2 is arranged between the light source module 1-2 and the light splitting module 2-2. The first color filter 11-1 and the first color filter 11-2 overlap covering wavelength bands. The two sets of arrangements respectively modulate the light beams with overlapped wave bands, and then simultaneously emit the light beams into the same light mixing module 4. The light source module 1-1 (1-2) includes a light source 13 and a slit 12 which are spectrally continuous. The spectral module 2-1 (2-2) includes a first lens unit 21, a dispersion unit 22-1 (22-2), and a second lens unit 23. The dispersion unit 22-1 and the dispersion triad 22-2 are prisms, and the coverage wavelength bands correspond to the first color filter 11-1 and the first color filter 11-2, respectively. The spectrum selection module 3-1 (3-2) is a digital micromirror device. An optical trap 45 is also provided near the exit optical path of the spectrum selection module 3-1 (3-2). The light beams of the spectrum selection module 3-1 (3-2) are coupled to the light mixing module 4 through the third lens unit 41. A second color filter 43 is also provided in the optical path of the third lens unit 41 and the light mixing module 4. The light mixing module 4 is an integrating sphere, the integrating sphere further comprises an exit window 46, and a photoelectric detector 44 is further arranged inside the integrating sphere.
While the present invention has been described with reference to the embodiments, it will be understood by those skilled in the art that the above embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of protection of the invention is defined by the appended claims.
Claims (10)
1. The spectrum-adjustable light source is characterized by comprising a light source module (1), a light splitting module (2), a spectrum selection module (3) and a light mixing module (4), wherein light beams emitted by the light source module (1) sequentially pass through the light splitting module (2), the spectrum selection module (3) and the light mixing module (4) and then are emitted;
the light source module (1), the light splitting module (2) and the spectrum selection module (3) are in multiple groups, wherein the multiple groups of light source module (1), the light splitting module (2) and the spectrum selection module (3) respectively modulate light beams with different or overlapped wave bands;
the light beams generated by the multiple groups of light source modules (1), the light splitting module (2) and the spectrum selection module (3) are simultaneously emitted into the same light mixing module (4).
2. A spectrally tunable light source as claimed in claim 1, characterized in that a first color filter (11) is arranged between the light source module (1) and the light splitting module (2) of each group, and that the first color filters (11) arranged in each group cover different or overlapping wavelength bands.
3. Spectrally tunable light source according to claim 1, characterized in that a plurality of groups of said light splitting modules (2) respectively comprise the same or different dispersive units (22).
4. The spectrally tunable light source of claim 3, characterized in that the light splitting module (2) further comprises a first lens unit (21) and a second lens unit (23), and is arranged in the order of the first lens unit (21), the dispersive unit (22), and the second lens unit (23).
5. Spectrally tunable light source according to claim 1, characterized in that the spectral selection module (3) is a digital micromirror device.
6. Spectrally tunable light source according to claim 1, characterized in that the light mixing module (4) comprises an integrating sphere.
7. The spectrally tunable light source of claim 1, further comprising a third lens unit (41), the light beam of the light splitting module (2) being coupled to the light mixing module (4) through the third lens unit (41).
8. Spectrally tunable light source according to claim 7, characterized in that a second color filter (43) is further arranged in the optical path of the third lens unit (41) and the light mixing module (4).
9. Spectrally tunable light source according to claim 1, characterized in that the light mixing module (4) further comprises a photodetector (44).
10. A spectrally tunable light source according to claim 1, characterized in that a light trap (45) is further arranged in the vicinity of the exit light path of the spectrally selective module (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922288104.8U CN211315851U (en) | 2019-12-19 | 2019-12-19 | Spectrum adjustable light source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922288104.8U CN211315851U (en) | 2019-12-19 | 2019-12-19 | Spectrum adjustable light source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211315851U true CN211315851U (en) | 2020-08-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922288104.8U Active CN211315851U (en) | 2019-12-19 | 2019-12-19 | Spectrum adjustable light source |
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| Country | Link |
|---|---|
| CN (1) | CN211315851U (en) |
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- 2019-12-19 CN CN201922288104.8U patent/CN211315851U/en active Active
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Assignee: HANGZHOU EVERFINE DETECTION CALIBRATION TECHNOLOGY Co.,Ltd. Assignor: EVERFINE PHOTO-E-INFO Co.,Ltd. Contract record no.: X2021330000141 Denomination of utility model: A spectrum adjustable light source Granted publication date: 20200821 License type: Common License Record date: 20210826 |