WO2020253437A1

WO2020253437A1 - Illumination system having detection function

Info

Publication number: WO2020253437A1
Application number: PCT/CN2020/090808
Authority: WO
Inventors: 王雷; 巫英坚
Original assignee: 深圳市中光工业技术研究院
Priority date: 2019-06-21
Filing date: 2020-05-18
Publication date: 2020-12-24
Also published as: CN112113184A

Abstract

An illumination system (10) having a detection function comprises: an illumination light source (101) used to emit illumination light (111) exiting via an illumination light path; a first detection light source (102) used to emit first detection light (112) exiting via a first detection light path; and a light modulation device (120) provided on the illumination light path and the first detection light path, and used to modulate spatial distribution of the illumination light (111) and the first detection light (112), such that the illumination light (111) and the first detection light (112) simultaneously exit at at least some time periods and form complementary patterns at an exit side of the light modulation device (120). The invention ensures that detection and monitoring operations are performed on a non-illumination region in real time, and realizes precise matching of complementary patterns of exiting illumination and detection light by means of modulation performed by same light modulation device (120), thereby enhancing safety.

Description

A lighting system with detection function

Technical field

The present invention relates to the field of lighting technology, in particular to a lighting system with a detection function.

Background technique

Automotive headlight sources have undergone upgrades from halogen lamps, xenon lamps to LED headlights. At present, LED automotive headlights have begun to spread in the automotive market. Compared with other light sources, laser light sources have high brightness, high energy efficiency, long life, small size, good directionality and fast start-up speed, etc., making laser headlights a new development trend after LED headlights, and has begun to be used in Part of the high-end car market.

Due to the small divergence angle of the laser and easy control of the direction, companies such as Texas Instruments and Audi have successively proposed laser headlight concept products based on digital micromirror arrays (such as DMD, Digital Micromirro Device). The laser headlights can be controlled by an intelligent controller. Color and light intensity, according to the direction of the oncoming vehicle, automatically close part of the mirror surface, change the irradiation area, reduce the glare effect on oncoming vehicles, and realize pixelated vehicle lighting.

However, the traffic environment changes rapidly. When the digital micro-mirror part of the car lights is turned off, the road lighting area corresponding to this part of the digital micro-mirror is not directly illuminated by the car light, and the driver cannot know the traffic in this area through the lighting of the car lights. Changes in conditions may lead to traffic accidents. Therefore, it is necessary to implement real-time monitoring of the lighting area where the vehicle lights are dynamically turned off to ensure the accuracy of traffic information collection and the accuracy of intelligent driving judgment. However, adding an additional independent detection system will increase the cost and overall system redundancy, and if the detection system and the lighting system are independent of each other, it is difficult to achieve accurate detection of the lighting area where the lights are dynamically turned off.

Summary of the invention

In view of the above technical problem that the prior art lighting system is difficult to realize real-time monitoring of non-illuminated areas, the present invention provides a lighting system with detection function, including: an illuminating light source for emitting illuminating light, the illuminating light passes through the illuminating light path The first detection light source is used to emit the first detection light, and the first detection light is emitted through the first detection light path; the light modulation device is arranged on the illumination light path and the first detection light path, and is used to modulate the illumination light and the first detection The spatial distribution of the light is such that the illumination light and the first detection light are emitted at the same time during at least part of the period, and a complementary pattern is formed on the emission side of the light modulation device.

In one embodiment, the light modulation device includes an illumination sequence and a detection sequence. During the illumination sequence, the illumination light source and the first detection light source are turned on at the same time, and during the detection sequence, the illumination light source is turned off. Increasing the detection timing can further increase the detection accuracy.

In one embodiment, the light modulation device includes a micromirror array including a plurality of micromirrors. The micromirrors include at least a first state and a second state with different setting angles, and the illumination light and the first probe light are from different directions. It is incident to the light modulation device, and is reflected by the micro mirrors in the first state and the second state, and then exits in the same direction.

In one embodiment, the light modulation device includes a liquid crystal modulator, and further includes a polarization filter disposed at the exit end of the liquid crystal modulator, and the illuminating light and the first detection light are respectively in a first polarization state and a second polarization state orthogonal to each other. It is incident on the incident end of the liquid crystal modulator.

In one embodiment, during the detection sequence, when each micro-mirror is in an intermediate state between the first state and the second state, the first detection light source pulses the first detection light, and the pulse width is much smaller than the intermediate state Duration.

In one embodiment, in the detection sequence, when the first detection light source is in the on state, each micro mirror is in the second state; or, in the detection sequence, when the first detection light source is in the on state, a part of the micro mirror In the second state, and in two consecutive detection timings, the states of each micro-mirror are opposite.

In one embodiment, it further includes a receiving system. The receiving system includes a first sensor and a second sensor. The first sensor has a spectral response to the illumination light, and the second sensor has a spectral response to the first detection light. The spectral response and the spectral response of the illumination light obtain environmental detection information.

In one embodiment, it includes a second detection light source for emitting second detection light, the second detection light is emitted through the second detection light path, and also includes a light combining device, which is arranged between the illumination light source and the light modulation device, Used to combine the illuminating light with the second detection light. Adding a second detection light source can further increase the detection accuracy.

In one embodiment, the first detection light source and the second detection light source are infrared light sources, and the illumination light source includes a semiconductor light source.

In one embodiment, the first detection light source is an infrared light source, and the illumination light source includes a semiconductor light source.

In one embodiment, an excitation light source and a wavelength conversion device are included. The wavelength conversion device at least includes a first wavelength conversion material and a second wavelength conversion material. The first wavelength conversion material and the second wavelength conversion material are overlapped, and the excitation light source excites the The first wavelength conversion material generates the illumination light, and the excitation light source excites the second wavelength conversion material to generate the first probe light or the second probe light.

In one embodiment, it further includes a light splitting device, which is arranged after the wavelength conversion device to split the illumination light and the first detection light and guide them to the illumination light path and the first detection light path, respectively.

In one embodiment, it further includes a light splitting device, which is arranged after the wavelength conversion device to split the illumination light, the first detection light, and the second detection light and guide them to the illumination light path, the first detection light path, and the second detection light path, respectively.

Compared with the prior art, the present invention includes the following beneficial effects: by arranging the light modulation device on the optical path between the illumination light emitted by the illumination light source and the first detection light emitted by the first detection light source, so that at least part of the time, when the illumination When the light and the first probe light are emitted at the same time, the light modulation device modulates the spatial distribution of the illuminating light and the first probe light to form a complementary pattern of the illuminating light and the first probe light. The complementary detection of the first probe light is used to realize the Real-time monitoring of the lighting area solves the monitoring problem of the area that cannot be irradiated by the lighting light modulated by the light modulation device, and greatly improves the safety. On the other hand, this technical solution uses the same light modulation device to modulate the illuminating light and the first detection light, without using two light modulation devices for synchronous operation, and realizes the precise matching of complementary patterns, and the light modulation device is complex It reduces the overall cost.

Description of the drawings

FIG. 1 is a schematic structural diagram of a lighting system according to Embodiment 1 of the present invention;

2 is a schematic diagram of the structure of the light modulation device of the lighting system of the present invention;

3 is a schematic diagram of the structure of the micro-reflector of the light modulation device of the illumination system of the present invention;

4 is a schematic diagram of the pattern formed by the illumination light and the first probe light of the illumination system of the present invention on the exit side of the light modulation device;

Fig. 5 is a schematic structural diagram of a lighting system according to the second embodiment of the present invention;

Fig. 6 is a timing diagram of the illumination light source, the first detection light source and a micro mirror according to the third embodiment of the present invention;

7 is a schematic structural diagram of the light modulation device of the illumination system according to the third embodiment of the present invention when modulating the first probe light;

FIG. 8 is a schematic structural diagram of a lighting system according to a fourth embodiment of the present invention;

Detailed ways

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings and embodiments. Please refer to FIG. 1, which is a schematic structural diagram of a lighting system according to Embodiment 1 of the present invention.

The illumination system 10 includes an illumination light source 101, a first detection light source 102, a light modulation device 120, a first sensor 121 and a second sensor 122.

The illuminating light source 101 emits illuminating light 111, and the illuminating light 111 exits through the light modulating device 120 through the illuminating light path. The light modulating device 120 modulates the spatial distribution of the illuminating light 111 to obtain a refined lighting distribution of brightness and darkness. The illuminating light 111 illuminates the target object 11 Then, the light reflected by the target object 11 returns to the illumination system 10 and is received by the first sensor 121. The illumination light source 101 may include a semiconductor light source, such as an LED light source or a laser diode light source. This type of light source has the characteristics of fast response speed and current modulation.

The first detection light source 102 emits the first detection light 112. The first detection light 112 is emitted through the light modulation device 120 and irradiated on the target object 11. Then, the light reflected by the target object 11 returns to the illumination system 10 and is The sensor 122 receives. The optical path of the first detection light 112 from the first detection light source 102 to the second sensor 122 is called the first detection optical path. The first detection light source 102 may be an infrared light source. The infrared light source is non-visible light and has less content in the natural environment. Therefore, using the infrared light source as the detection light source can reduce noise and improve detection accuracy.

The light modulation device 120 is arranged on the illumination light path and the first detection light path, and is used to modulate the spatial distribution of the illumination light 111 and the first detection light 112. As shown in FIG. 2, in the present invention, the light modulation device 120 includes a micromirror array including a plurality of micromirrors. The figure exemplarily shows a 30×16 micromirror array matrix. It is understood that the present invention does not limit the micromirror array. The number of micro-mirrors included in the mirror array can be far more than the number shown in the figure. Specifically, the light modulation device 120 may be, for example, a DMD (Digital Micromirror Device, digital micromirror device). The micro-mirror includes at least a first state and a second state with different setting angles. As shown in FIG. 3, two micro-mirrors included in the light modulation device 120 are exemplarily shown, which is a side view of the micro-mirror. , From left to right, are the first state and the second state of the micro mirror. The illumination light 111 and the first detection light 112 are respectively incident on the light modulation device 120 from different directions, and are respectively reflected by the micro mirrors in the first state and the second state, and then exit in the same direction. The light modulation device 120 is used to modulate the spatial distribution of the illumination light 111 and the first detection light 112 so that the illumination light and the first detection light are emitted at the same time during at least part of the period, and a complementary pattern is formed on the exit side of the light modulation device 120. As shown in FIG. 4, FIG. 4 exemplarily shows the pattern formed by the illumination light 111 on the exit side of the light modulation device 120 (FIG. 4a) and the pattern formed by the first probe light 112 on the exit side of the light modulation device at a certain time. (Figure 4b), the above two patterns are complementary patterns. Specifically, the white block in Figure 4a is the pattern formed by the illumination light 111 when the micro mirror is in the first state, and the gray block is illuminated when the micro mirror is in the second state. The pattern formed by the light 111, in FIG. 4b, the white blocks are the patterns formed by the first detection light 112 when the micro mirror is in the second state, and the gray blocks are the patterns formed by the first detection light 112 when the micro mirror is in the first state. The examples are only for convenience of illustration. The present invention does not limit the specific patterns of the illumination light 111 and the first detection light 112 after being modulated by the light modulation device 120, and intelligently modulate the patterns of the illumination light according to the detection signal, such as avoiding the impact of the illumination light on traffic Interference (such as avoiding glare).

The present invention also includes a receiving system. The receiving system includes a first sensor 121 and a second sensor 122. The illumination light 111 and the first detection light 112 are irradiated on the target object 11. Because the illumination light 111 and the first detection light 112 are in the light modulation device The exit side 120 forms a complementary pattern, so the illuminating light 111 and the first probe light 112 are roughly separated and irradiated at different positions of the target object 11. In particular, the illuminating light 111 irradiates a part 11-1 of the target object 11 (not shown in the figure). Out), the first probe light 112 illuminates another part 11-2 of the object (not shown in the figure). Among them, a part of the target object 11-1 is in the illuminated area of the illuminating light 111 and can be directly observed by the driver, while the other part of the target object 11-2 is in a non-illuminated area, which may cause danger because it is not observed. The invention uses the first detection light 112 to detect another part 11-2 of the target object to reduce the occurrence of danger. The illumination light 111 is reflected back to the illumination system by a part 11-1 of the target object, and the first detection light 112 is reflected back to the illumination system by another part 11-2 of the target object. After passing through a wavelength splitting device (not shown), the illumination light 111 is projected to the first sensor 121, the first sensor 121 has a spectral response to the illumination light 111, the first detection light 112 is projected to the second sensor 122, and the second sensor 122 has a spectral response to the first detection light 112, specifically, One sensor 121 may be a visible light detector, such as a visible light camera, and the second sensor 122 may be an infrared detector. The first detection light 112 can detect the indirect observation area and reduce the possibility of danger. By combining the spectral response of the first sensor 121 to the illumination light 111, the accuracy of environmental detection information can be further improved.

By arranging the light modulation device 120 on the optical path between the illumination light 111 emitted by the illumination light source 101 and the first detection light 112 emitted by the first detection light source 102, at least part of the period, when the illumination light 111 and the first detection light 112 are simultaneously When exiting, the light modulation device 120 modulates the illuminating light 111 and the first probe light 112 in spatial distribution to form a complementary pattern of the illuminating light 111 and the first probe light 112, and uses the complementary detection of the first probe light 112 to realize non-illumination The real-time monitoring of the area solves the problem of monitoring the area where the illuminating light 111 modulated by the light modulation device 120 cannot be irradiated, and the safety is greatly improved. On the other hand, this technical solution uses the same light modulation device 120 to modulate the illuminating light 111 and the first detection light 112, without using two light modulation devices for synchronous operation, and achieves the precise matching of complementary patterns, and through light modulation The reuse of devices reduces the overall cost.

In a modified embodiment of the first embodiment of the present invention, the light modulation device 120 includes a liquid crystal modulator, and further includes a polarization filter disposed at the exit end of the liquid crystal modulator, and the illumination light 111 and the first detection light 112 are orthogonal to each other. The first polarization state and the second polarization state are incident on the incident end of the liquid crystal modulator. By controlling the voltage applied to the liquid crystal cell, the orientation of the liquid crystal molecules is determined, thereby controlling the polarization state of the emitted light of the liquid crystal cell, and then filtering the light through the polarizing filter to determine the transmittance of the light passing through the liquid crystal cell .

For example, for the same liquid crystal modulation pixel, regardless of light transmission loss and other factors, the illumination light incident with 100% P polarized light, the light reaching the polarizing filter includes N% P illumination light and (100-N) %S illumination light. If the polarizing filter transmits P light and reflects S light, the emitted light is N% P illumination light. At the same time, the first detection light of 100% S polarized light is incident. After being modulated by the liquid crystal, N% of the first detection light of S and (100-N)% of the first detection light of P are formed. (100-N)% of P first probe light is emitted. Then, finally N% of the illumination light and (100-N)% of the first probe light are emitted together to form a complementary pattern on the emission side of the liquid crystal modulator. By analogy, the entire liquid crystal modulator including a plurality of liquid crystal modulation pixels, the illumination light pattern and the first detection light pattern form an overall complementary pattern.

This modified embodiment uses a liquid crystal modulator for modulation, which can control the polarization transmittance of light and maintain the transmittance within a certain period of time. Compared with the modulation of the time duty cycle of the DMD, it is beneficial to the stability of the modulation. , But at the same time correspondingly, the modulation rate will be relatively low.

Please refer to FIG. 5, which is a schematic structural diagram of a lighting system according to Embodiment 2 of the present invention. The illumination system 20 includes an excitation light source 200, a wavelength conversion device 240, a light modulation device 220, a first sensor 221 and a second sensor 222. The wavelength conversion device 240 includes a first wavelength conversion material 241 and a second wavelength conversion material 242, and the first wavelength conversion material 241 and the second wavelength conversion material 242 are overlapped. Wherein, the first wavelength conversion material 241 and the second wavelength conversion material 242 may be respectively located in two superimposed layers, or may be mixed in one layer. The excitation light source 200 excites the first wavelength conversion material 241 to generate illumination light 211, that is, the excitation light source 200 and the first wavelength conversion material together form an illumination light source; the excitation light source 200 excites the second wavelength conversion material 242 to generate the first probe light 212, That is, the excitation light source 200 and the second wavelength conversion material 242 together constitute the first detection light source.

Specifically, the excitation light source 200 can be a blue laser light source, such as a blue laser diode light source, and the first wavelength conversion material 241 can be a yellow fluorescent material, such as Ce:YAG. The yellow fluorescent material is excited by blue light, so that the generated yellow light is not The absorbed blue light is mixed to obtain white light for illumination. The second wavelength conversion material 242 can be an infrared phosphor material, which absorbs blue light and emits infrared light. Furthermore, since the fluorescence spectrum is generally broad, in order to improve the accuracy of the detection signal, it is necessary to set a filter on the path of infrared fluorescence to obtain narrow-spectrum infrared fluorescence. Alternatively, in another embodiment, the second wavelength conversion material 242 is an infrared quantum dot material, which has a narrow emission spectrum and can well meet the wavelength requirements of the detection light.

In the second embodiment, the illumination system 20 further includes a dichroic plate 250, a first reflecting mirror 251, a first reflecting mirror 252, and a first reflecting mirror 253. The dichroic plate 250 transmits blue and yellow light and reflects infrared light. The first reflecting mirror 251, the first reflecting mirror 252, and the first reflecting mirror 253 guide the infrared light to enter the light modulating device 220 at an angle, so that the white light and infrared light are modulated by the light modulating device 220 and then exit at the same time. The exit side forms a complementary pattern.

In the third embodiment of the present invention, the modulation timing of the light modulation device 120 can still be divided into lighting timing and detection timing with reference to the lighting system structure of FIG. 1. In the lighting timing, the lighting light source 101 and the first detection light source 102 are turned on at the same time. During the detection sequence, the illumination light source 101 is turned off. Compared with the first embodiment, the third embodiment adds an independent detection timing, which further increases the detection accuracy.

Further, as shown in FIG. 6, FIG. 6 is a timing diagram of the illumination light source, the first detection light source and a micro mirror in the third embodiment of the present invention. In the detection sequence, when each micro-mirror is in an intermediate state between the first state and the second state, the first detection light source 102 pulses the first detection light 112, and the pulse width is much smaller than the duration of the intermediate state. The detection light source is emitted when the micro-mirror is in an unstable state, and the emission angle is no longer the same as in the steady state. There are only two possibilities.

Specifically, the pulse width of the first probe light is at least two orders of magnitude smaller than the duration of the intermediate state. The pulse duration can be several nanoseconds, while the duration of the intermediate state is approximately several microseconds. Therefore, for the pulsed first detection light, the micro-mirror is actually stationary at a certain angle at any time.

In this embodiment, the principle of blazed gratings (Blazed Gratings) is used to deflect the incident detection light pulses to realize scanning detection. The method of grating formation is to make each micro-mirror deflect at the same certain angle in the switching state to form a grating composed of a micro-mirror array, which modulates the phase of light to achieve light deflection.

In another embodiment of the third embodiment of the present invention, in the detection timing, when the first detection light source 102 is in the on state, each micro-mirror is in the second state.

Compared with a uniform detection light field, a detection light field with a certain pattern distribution improves detection accuracy by carrying more detection information. However, due to the discontinuous irradiation area, objects of small size or strange shape may be missed, thereby affecting safety issues. In order to further solve this problem, on the basis of the third embodiment, further, its modified embodiment uses two consecutive detection timings to make the states of the micro-mirrors of the two detection timings opposite, so that the two detections The emission patterns of the probe light emitted in time series are complementary patterns. For example, at the first detection timing, the distribution of the micromirror array of the light modulation device is shown in FIG. 7, and at the second detection timing, the states of the micromirrors indicated by white and diagonal lines in FIG. 7 are interchanged. The micro-mirror indicated by white in the figure is in the first state, and the micro-mirror indicated by diagonal lines is in the second state. This technical solution makes up for the problem of missing information that may exist when only a single pattern is used.

It can be understood that, in the present invention, the pattern of modulating the probe light is not limited to the listed horizontal grating distribution, and can also be other patterns, and is not limited to a fixed pattern, and can also be a variety of alternate patterns.

Please refer to FIG. 8, which is a schematic structural diagram of a lighting system according to a fourth embodiment of the present invention. Compared with the first embodiment, the fourth embodiment of the present invention adds a second detection light source, and the detection accuracy is improved by adding the second detection light source. The illumination system 40 includes an illumination light source 401, a first detection light source 402, a second detection light source 403, a light modulation device 420, and a first sensor 421 and a second sensor 402. The illuminating light source 401 emits illuminating light 411, and the illuminating light 411 exits through the light modulating device 420 through the illuminating light path. The light modulating device 420 modulates the spatial distribution of the illuminating light 411 to obtain an illuminating distribution with refined brightness and darkness. The first detection light source 402 emits the first detection light 412. The first detection light 412 is emitted through the light modulation device 420 and irradiated on the target object 41. Then, the light reflected by the target object 41 returns to the illumination system 40, and finally reaches the second On sensor 422. The second detection light source 403 emits the second detection light 413, and the second detection light 413 is emitted through the light modulation device 420 and irradiated on the target object 41. Then, the light reflected by the target object 41 returns to the illumination system 40, and finally reaches the second On sensor 422.

The present invention adds a second detection light source, and the light emitted by the second detection light source and the light emitted by the first detection light source form a complementary pattern after light modulation. Although the second detection light and the illumination light source form the same pattern after passing through the light modulation device, since the natural light overlaps with the wavelength of the illumination light more, the illumination light received by the first sensor is noisy. The fourth embodiment of the present invention increases the signal-to-noise ratio of detection by adding a second detection light source.

In a modified embodiment of the fourth embodiment of the present invention, the illumination light, the first probe light, and the second probe light are obtained by exciting the first wavelength conversion material and the second wavelength conversion material in the wavelength conversion device by the excitation light source, and the first wavelength conversion The material and the second wavelength conversion material are overlapped, the excitation light source excites the first wavelength conversion material to generate illumination light, and the excitation light source excites the second wavelength conversion material to generate the first probe light or the second probe light. The lighting system also includes a light splitting device, which is arranged after the wavelength conversion device to split the illuminating light, the first detection light, and the second detection light and guide them to the illumination light path, the first detection light path, and the second detection light path, respectively. The process of the illumination light, the first detection light, and the second detection light being reflected by the object and entering the first sensor and the second sensor after passing through the light modulation device is referred to the foregoing embodiments, and will not be repeated here.

The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referred to each other.

The above are only the embodiments of the present invention and do not limit the scope of the present invention. Any equivalent structure or equivalent process transformation made by using the content of the description and drawings of the present invention, or directly or indirectly applied to other related technologies In the same way, all fields are included in the scope of patent protection of the present invention.

Claims

An illumination system with detection function, characterized in that it comprises:

Illumination light source for emitting illuminating light, said illuminating light is emitted through the illuminating light path;

The first detection light source is configured to emit first detection light, and the first detection light is emitted through the first detection light path;

The light modulation device is arranged on the illumination light path and the first detection light path, and is used to modulate the spatial distribution of the illumination light and the first detection light so that at least part of the time, the illumination light and the The first probe lights are emitted simultaneously and form a complementary pattern on the emission side of the light modulation device.
The illumination system according to claim 1, wherein the light modulation device comprises an illumination sequence and a detection sequence, within the illumination sequence, the illumination light source and the first detection light source are turned on simultaneously, and the During the detection sequence, the illumination light source is turned off.
The illumination system according to claim 1 or 2, wherein the light modulation device comprises a micromirror array including a plurality of micromirrors, and the micromirrors include at least a first state and a second state with different setting angles. In the state, the illumination light and the first probe light are incident on the light modulation device from different directions, and are reflected by the micro mirrors in the first state and the second state, respectively, and then exit in the same direction.
The illumination system according to claim 1 or 2, wherein the light modulating device comprises a liquid crystal modulator, and further comprises a polarizing filter arranged at the exit end of the liquid crystal modulator, and the illumination light and the second A probe light is incident on the incident end of the liquid crystal modulator in a first polarization state and a second polarization state orthogonal to each other.
The lighting system according to claim 3, wherein, in the detection timing, when each of the micro mirrors is in an intermediate state between the first state and the second state, the The first detection light source pulses the first detection light, and the pulse width is much smaller than the duration of the intermediate state.
The illumination system according to claim 3, characterized in that, in the detection sequence, when the first detection light source is in the on state, each of the micro mirrors is in the second state; or, in the detection Timing sequence: when the first detection light source is in the on state, a part of the micro-mirrors are in the second state, and in two consecutive detection timings, each micro-mirror is in the opposite state.
The lighting system according to claim 1, further comprising a receiving system, the receiving system comprising a first sensor and a second sensor, the first sensor has a spectral response to the illumination light, and the second sensor The spectral response of the sensor to the first detection light is combined with the spectral response of the first detection light and the spectral response of the illumination light to obtain environmental detection information.
The illumination system according to claim 1, characterized in that it comprises a second detection light source for emitting second detection light, said second detection light is emitted through the second detection light path, and further comprises a light combining device, said combining The light device is arranged between the illumination light source and the light modulation device, and is used for combining the illumination light and the second detection photos.
8. The illumination system according to claim 8, wherein the first detection light source and the second detection light source are infrared light sources, and the illumination light source comprises a semiconductor light source.
The illumination system according to claim 1 or 2, wherein the first detection light source is an infrared light source, and the illumination light source comprises a semiconductor light source.
The illumination system according to any one of claims 1, 2 or 8, characterized by comprising an excitation light source and a wavelength conversion device, the wavelength conversion device at least comprising a first wavelength conversion material and a second wavelength conversion material, and The first wavelength conversion material and the second wavelength conversion material are overlapped, the excitation light source excites the first wavelength conversion material to generate the illumination light, and the excitation light source excites the second wavelength conversion material to generate The first probe light or the second probe light.
11. The illumination system according to claim 11, further comprising a light splitting device, which is arranged after the wavelength conversion device to split the illumination light and the first detection light and respectively guide them to the illumination light path and The first detection light path.
The illumination system according to claim 11, further comprising a light splitting device, which is arranged after the wavelength conversion device to split the illumination light, the first detection light, and the second detection light and respectively Guide to the illumination light path, the first detection light path, and the second detection light path.