WO2018059411A1

WO2018059411A1 - Broad spectrum light source

Info

Publication number: WO2018059411A1
Application number: PCT/CN2017/103536
Authority: WO
Inventors: 苑高强; 刘民玉
Original assignee: 高利通科技（深圳）有限公司
Priority date: 2016-09-30
Filing date: 2017-09-26
Publication date: 2018-04-05
Also published as: CN107884069A; CN107884069B

Abstract

A broad spectrum light source applicable to the field of light source technologies for materials analysis is provided. A broad spectrum light source is obtained by means of the concept of combined multi-spectral imaging. Specifically, a shortpass filter (502) filters out a visible spectrum comprising a peak spectral line from light (514) in a first direction of a deuterium lamp (501) to obtain blue light and an ultraviolet spectrum. Light (515) generated in a second direction of the deuterium lamp (501) passes through a 400 nm bandpass filter (505) to generate a 400 nm partial blue light spectrum. A neutral density filter (509) reduces visible light from light (516) in a first direction of a tungsten lamp (508). A longpass filter (511) filters blue light, an ultraviolet spectrum, and a visible spectrum from light (517) generated in a second direction of the tungsten lamp (508) to obtain a near-infrared spectrum. Light obtained after filtering in the first direction and the second direction of the deuterium lamp (501) and light obtained after filtering in the first direction and the second direction of the tungsten lamp (508) are combined by a light combining device, to obtain a smooth broad spectrum light source having a near-infrared light intensity of nearly double conventional light sources.

Description

Title of Invention: A Broadband Spectral Source

Technical field

[0001] The present invention relates to a light source for material analysis, and more particularly to a light source having broadband spectral design features for spectral analysis and measurement of materials.

Background technique

[0002] At present, the broadband source commonly used in spectroscopic analysis on the market is a tungsten-tungsten lamp, that is, a combination of a xenon lamp and a tungsten lamp by a reflective structure or a transmissive structure for spectral analysis measurement. The spectrum of the tungsten lamp and the xenon lamp is shown in Figure 1 (no absolute spectral intensity calibration), 101 is the tungsten lamp spectrum, 102 is the xenon lamp spectrum, and 103 is the xenon lamp peak spectrum 656. lnm. The spectrum in Figure 1 is measured by a spectrometer with a CCD detector. The visible light peak in the tungsten lamp spectrum 101 is between 571 nm and 637 nm. When using such tungsten lamps in conjunction with such spectrometers for spectral measurements, if it is necessary to increase the overall light source intensity (including ultraviolet light, visible light, and near-infrared light) to increase the near-infrared pupil, when the visible light portion is strong to some extent, The spectrometer produces saturation; the detector of this spectrometer does not work properly.

[0003] For the sake of simplicity, only a tungsten-tungsten lamp having a transmissive structure is illustrated as an example, as shown in FIG. The design is to focus the light emitted by the tungsten lamp 201 with the lens 202 and pass through the aperture beam in the bulb of the xenon lamp 203 to form a broadband spectrum 204 with the light emitted by the xenon lamp (such as a 生产 produced by Avantes, the Netherlands). Tungsten light broadband source - AvaLight-DH-S, etc.). It is known from the spectrum in Fig. 1 that there are two inherent problems with such a tungsten-tungsten lamp: First, the xenon lamp spectrum (ultraviolet to visible) has a partial peak spectrum (such as 656.1 nm, etc.) which easily saturates the detector of the spectrometer; When the detector of the saturated helium spectrometer does not work properly. Although, some companies use a two-color spectroscope to filter out most of the 656. lnm spike spectrum to avoid saturation problems (such as a tungsten-tungsten broadband source produced by Avantes in the Netherlands - AvaLight-DH-S-BAL, etc.), but This will increase the cost because the dichroic mirror is made by the coating process. Second, because the spectral responsivity of CCD or CMOS is very low in the near-infrared spectrum, for the spectrometer with CCD or CMOS as the detector, the signal-to-noise ratio of the corresponding near-infrared spectral section is small and is not conducive to spectral analysis measurement. Although high-power tungsten lamps can be used to increase near-infrared light intensity, this can lead to new problems such as increased power consumption and more heat generation, and in the case of increasing near-infrared pupils, the visible portion will also increase when visible light Partially strong to a certain extent The spectrometer produces saturation; the detector of this spectrometer does not work properly.

[0004] Patent 201520834344.2 provides a light source having a broadband spectrum, as shown in FIG. 3, comprising: a first light source 301, a short pass filter 302, a first fiber input connector 303, a second light source 304, and a visible attenuation filter. a sheet 305, a second fiber input connector 306, a third light source 307, a long pass filter 308, a third fiber input connector 309, a first fiber output connector 310, a fourth fiber input connector 311, and a second fiber output connector 312, The three optical fiber input connectors and the two fiber output connectors constitute a light combining device, wherein the first light source is an ultraviolet light source and a blue light source, and the second light source is a light source including ultraviolet light, visible light and near infrared light. The wideband spectrum produced by the patent with a flat broadband and nearly doubled near-infrared light, as shown in Fig. 4, includes ultraviolet light, visible light and near-infrared light. The patent can solve the spectrum of the xenon lamp in the broadband spectrum as the peak of 6 56. lnm The spectral and visible light relative to ultraviolet light and near-infrared light intensity are too large to easily saturate the spectrometer with CCD or CM OS as a detector, and the problem of low signal-to-noise ratio of near-infrared light in the broadband spectrum can be solved. However, the broadband spectrum produced by this patent has a problem that the xenon lamp spectrum is relatively weak at 400 nm; in addition, because of the built-in two tungsten lamps, there is a large power consumption and it is easy to generate excess heat and a large volume.

[0005] In summary, the prior art obviously has defects or deficiencies in actual use, so it is necessary to improve technical problems.

[0006] In view of the above-mentioned drawbacks or deficiencies, it is an object of the present invention to provide a light source having a broadband spectrum having a broadband spectrum which is generally flat, wide-band and nearly doubled in near-infrared light, including ultraviolet light, visible light, and near-infrared light. . The light source can solve the saturation spectrum problem of the xenon lamp spectrum in the broadband spectrum as the 656.1 nm spike spectrum and the visible light relative to the ultraviolet light and the near-infrared light intensity, so that the spectrometer with the CCD or CMOS as the detector can easily solve the near-infrared in the broadband spectrum. The problem of low optical signal-to-noise ratio and the same problem can also solve the problem that the broadband spectrum has a relatively weak 400 nm spectrum of the xenon lamp, and it can also solve the problem of excessive heat and large volume due to the large power consumption of the built-in two tungsten lamps.

Problem solution

Technical solution

In order to achieve the above object, the present invention provides a broadband spectral light source, comprising: a first light source, a short pass filter, a 400 nm band pass filter, a second light source, a visible attenuation filter, and a long pass filter. a film and a light combining device, the light combining device is a quadruple comprising four fiber input connectors and one fiber output connector An optical fiber, the first light source is an ultraviolet light and a blue light source, and the second light source is a light source including ultraviolet light, visible light and near infrared light;

[0008] the light generated in the first direction of the first light source passes through the short pass filter to obtain a blue light and ultraviolet spectrum, and the blue light and ultraviolet spectrum are coupled into the first optical fiber input connector of the light combining device;

[0009] The light generated in the second direction of the first light source passes through the 400 nm band pass filter to obtain a 400 nm blue portion spectrum, and the 400 nm blue portion spectrum passes through the first variable light intensity device or changes the first a coupling distance between a light source and an optical transmission device between the optical fiber output connectors of the light combining device to adjust the light intensity and output;

[0010] the light generated in the first direction of the second light source passes through the visible attenuation filter to obtain light that is partially attenuated by the visible light, and the light that is partially attenuated by the visible light is coupled into the third portion of the light combining device. Fiber optic input connector;

[0011] the light generated in the second direction of the second light source passes through the long pass filter to obtain a near-infrared spectrum, and the near-infrared spectrum passes through the second variable light intensity device or changes the second light source with a coupling distance of the optical transmission device between the optical fiber output connectors of the light combining device to adjust the light intensity and output;

[0012] The light combining device combines light entering by the four fiber input connectors and outputs an overall flat broadband spectrum including ultraviolet light, visible light, and near-infrared light through the fiber output connector.

[0013] According to the light source of the present invention, the light combining device includes a first two-in-one Y-type optical fiber, a second two-in-one Y-type optical fiber, and a third two-in-one Y respectively having two input connectors and one output connector. Optical fiber

[0014] two input connectors of the first two-in-one Y-type optical fiber respectively serve as a first optical fiber input connector and a second optical fiber input connector of the light combining device;

[0015] two input connectors of the second two-in-one Y-type optical fiber respectively serve as a third optical fiber input connector and a fourth optical fiber input connector of the light combining device;

[0016] The two input connectors of the third two-in-one Y-type optical fiber are respectively connected to the output connectors of the first two-in-one Y-type optical fiber and the second two-in-one Y-type optical fiber, and the third two-in-one An output connector of a Y-type fiber is an optical fiber output connector of the light combining device.

[0017] According to the light source of the present invention, the first variable light intensity device of the first light source is a motor driven variable diaphragm

, motor driven wheeled gradient neutral filter or motor driven wedge plate pair;

[0018] the second variable light intensity device of the second light source is a motor driven variable light bar, and the motor drives a wheeled gradient Neutral filter or motor driven wedge plate pair.

[0019] According to the light source of the present invention, the light generated in the second direction of the first light source adjusts the light intensity thereof by changing the distance between the second fiber input joint and the first light source; The light generated in the second direction adjusts its light intensity by changing the distance between the fourth fiber input interface and the second light source.

[0020] According to the light source of the present invention, the second optical fiber input connector and the optical fiber of the fourth fiber input connector are respectively provided with an optical fiber twisting structure;

[0021] the light generated in the second direction of the first light source is adjusted in intensity by adjusting a distance of the fiber conjugate structure in the fiber of the second fiber input connector, and the light generated in the second direction of the second light source is adjusted by adjusting The strength of the fiber-coupling structure in the fiber of the fourth fiber input connector is adjusted.

[0022] According to the light source of the present invention, the light generated in the second direction of the first light source is adjusted in intensity by varying the distance between the collimator lens and the optical fiber in the second fiber input joint;

[0023] The light generated in the second direction of the second light source is adjusted in intensity by varying the distance of the collimator lens in the fourth fiber input connector from the fiber.

[0024] According to the light source of the present invention, the second optical fiber input connector passes the optical fibers of different core diameters to change the light intensity of the light generated in the second direction of the first light source; the fourth optical fiber input connector passes Optical fibers of different core diameters are provided to vary the intensity of light generated by the second direction of the second source.

[0025] According to the light source of the present invention, a method of coupling near-infrared light multi-coupling, visible light and ultraviolet light is used, that is, the fiber used in the second direction of the second light source uses a fiber with a larger core diameter to balance each part. The light is strong.

In accordance with the light source of the present invention, the light combining means is bifurcated or branched; and the light is coupled to the input or output of the fiber optic connector for direct coupling or coupling with a lens.

[0027] According to the light source of the present invention, the output light intensity of the second light source is adjusted by adjusting its driving current to change the second light source current to change the ultraviolet light spectrum and the visible light spectrum obtained in the first direction of the second light source. The near-infrared spectrum and the intensity of the near-infrared spectrum obtained in the second direction of the second source.

[0028] According to the light source of the present invention, the four fiber input connectors are further provided with a neutral light attenuating sheet for adjusting the balance light intensity.

[0029] According to the light source of the present invention, the first light source is a xenon lamp, a hydrogen lamp or a xenon lamp, and the second light source is a tungsten lamp or a xenon lamp. [0030] One of the technical problems to be solved by the present invention is to solve the problem that the 400 nm is relatively weak in the spectrum of the xenon lamp in the broadband spectrum light source, and the blue light and ultraviolet spectrum in the second direction except the 400 nm portion of the first light source are proposed. Filtering off a 400 nm blue light partial spectrum; the 400 nm blue light portion is spectrally coupled into the second optical fiber input of the light combining device and superimposed with the light generated in the first direction of the first light source to solve the xenon lamp spectrum is relatively weak The problem.

[0031] The second technical problem to be solved by the present invention is that the two tungsten lamps installed in the patent 201520834344.2 have large power consumption and are easy to generate excess heat and large volume shortage, and the proposed first direction of the second light source is generated. After passing through the visible attenuation filter, light having a visible light portion is attenuated and light generated in a second direction of the second light source is superimposed on the long-wavelength filter to obtain a near-infrared spectrum to reduce a tungsten The lamp, to solve the large power consumption, easily generates excess heat and a large volume shortage.

Advantageous effects of the invention

Beneficial effect

[0032] The overall technical effects of the present invention are embodied in the following aspects.

[0033] (I) In the present invention, one of the technical problems to be solved by the present invention is a design scheme of a 400 nm blue light partial spectrum obtained in the second direction of the superimposed xenon lamp proposed for the problem that the xenon lamp spectrum is relatively weak at 400 nm.

[0034] (B) In the present invention, one of the technical problems to be solved by the present invention is to utilize the combined multi-spectrum, including the power consumption of the existing patent 2015208343 44.2, which is easy to generate excess heat and volume. The blue light and ultraviolet spectrum obtained in the first direction of the xenon lamp, the spectrum of the 400 nm portion obtained in the second direction of the xenon lamp, the ultraviolet light spectrum obtained in the first direction of the tungsten lamp, the attenuated visible light spectrum and the near-infrared light spectrum, and tungsten The near-infrared spectrum obtained in the second direction of the lamp is combined by a light combining device to obtain a broadband spectrum design in which the overall smoothness, wideband, and near-infrared light intensity are almost doubled.

Brief description of the drawing

DRAWINGS

[0035] FIG. 1 is a spectrum of a common tungsten lamp and a xenon lamp;

2 is a schematic diagram of a common tungsten light source used in the prior art;

3 is a schematic structural diagram of a patent 201520834344.2;

4 is a broadband spectrum of the patent 201520834344.2;

5 is a schematic structural diagram of a first embodiment of the present invention; 6 is a schematic structural diagram of a second embodiment of the present invention;

7 is a schematic structural diagram of a third embodiment of the present invention;

8 is a schematic structural diagram of a fourth embodiment of the present invention;

9 is a schematic structural diagram of a fifth embodiment of the present invention;

10 is a schematic structural diagram of a sixth embodiment of the present invention;

11 is a schematic structural diagram of a seventh embodiment of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0047] The basic principle of the present invention is: a light source that obtains a broadband spectrum by combining multiple spectra, including: a first light source, a short pass filter, a 400 nm band pass filter, a second light source, a visible attenuation filter, Long pass filter and light combining device; the light combining device includes four fiber input connectors and one fiber output connector. The first light source is an ultraviolet light source and a blue light source, and the second light source is a light source including ultraviolet light, visible light and near infrared light.

[0048] The light generated in the first direction of the first light source passes through the short pass filter to obtain a blue light and ultraviolet spectrum, and the blue light and the ultraviolet spectrum are coupled into the first optical fiber input joint of the light combining device;

[0049] The light generated in the second direction of the first light source passes through the 400 nm band pass filter to obtain a 400 nm blue portion spectrum, and the 400 nm blue portion is spectrally coupled into the second fiber input connector of the light combining device; the 400 nm blue portion spectrum passes through a variable light intensity device or a coupling distance of the optical transmission device between the first light source and the optical fiber output connector of the light combining device to adjust the light intensity and output; thereby adjusting the 400 nm portion obtained in the second direction matching the first light source The relative spectral intensity of the blue and ultraviolet spectra obtained in the first direction of the first source is obtained to obtain a smooth blue and ultraviolet spectrum.

[0050] the light generated in the first direction of the second light source passes through the visible attenuation filter to obtain the light partially attenuated by the visible light, and the ultraviolet light generated by the first direction of the second light source, the attenuated visible light and the near-infrared light are coupled into the light. a third fiber optic input connector of the light combining device;

[0051] The light generated in the second direction of the second light source passes through the long pass filter to obtain a near-infrared spectrum, near-infrared light The spectral coupling is coupled to the fourth fiber optic input connector of the light combining device; the near infrared spectroscopy adjusts the light by the second variable light intensity device or by changing the coupling distance of the optical transmission device between the second light source and the fiber output connector of the light combining device The output is strong, thereby adjusting the relative intensity of the near-infrared spectrum obtained in the second direction of the tungsten lamp and the ultraviolet spectrum, the visible spectrum and the near-infrared spectrum obtained in the first direction of the tungsten lamp.

[0052] In addition, the ultraviolet light spectrum, the visible light spectrum and the near-infrared light spectrum obtained in the first direction of the second light source, and the near-infrared spectrum obtained by the second direction of the tungsten lamp can be changed by adjusting the adjustable electric resistance to change the second light source current. The intensity of the two segments is such that the intensity of the two segments is matched to the intensity of the gradual blue light and the ultraviolet spectrum obtained from the first source to obtain a broad spectrum of the overall smooth, broadband and near-infrared light intensity almost doubled.

[0053] The present invention solves the problem that the spectrum of the 400 nm blue light portion is relatively weak by superimposing the 400 nm blue light partial spectrum obtained in the second direction of the first light source. The present invention solves the 656.1 nm spike spectrum and the visible light relative to the ultraviolet light and the near-infrared light intensity in the xenon lamp spectrum of the prior art as the second light source by superimposing the near-infrared spectrum obtained in the second direction of the second light source. It is easy to solve the problem of saturation of spectrometer with CCD or CMOS as detector, which can solve the problem of low signal-to-noise ratio of near-infrared light in broadband spectrum. In addition, since only one second light source is provided, it can avoid large power consumption and easily generate excess heat. And big problems.

[0054] Using the broadband spectrum to perform spectral measurement with a spectrometer using CCD or CMOS as a detector, a relatively high signal-to-noise ratio can be obtained at near-infrared light; and when the overall light source intensity is increased, including ultraviolet light, visible light, and near-infrared light The intensity of the light is 吋, and the visible light portion does not saturate such a spectrometer over a large dynamic range. The broadband light source designed by the invention is economical and practical, and can be widely used for material analysis and measurement, and is convenient and practical.

[0055] Since xenon lamps are often used as ultraviolet light and blue light sources in practical applications, tungsten lamps are used as light sources including ultraviolet light, visible light and near-infrared light, and near-infrared light sources. Therefore, in the following embodiments, the present invention employs a xenon lamp as a first light source and a tungsten lamp as a second light source. In fact, the first light source may also use other ultraviolet light and blue light sources, such as xenon lamps, etc.; the second light source may also use other light sources including ultraviolet light, visible light, and near-infrared light, such as xenon lamps. The xenon lamp and the tungsten lamp in the following embodiments are not intended to limit the invention.

[0056] Embodiment 1

[0057] As shown in FIG. 5, the broadband spectral light source in this embodiment includes a xenon lamp 501, a short pass filter 502, a first fiber input connector 503 of the light combining device, an optical fiber output connector 504 of the light combining device, and a 400 nm band. Pass filter 50 5, xenon lamp variable light intensity device 506, second optical fiber input connector 507 of the light combining device, tungsten lamp 508, visible attenuation filter 509, third optical fiber input connector 510 of the light combining device, long wave pass filter 511, tungsten lamp 508 variable light intensity device 512, fourth optical fiber input connector 513 of the light combining device, light 514 generated in the first direction of the xenon lamp 501, light 515 generated in the second direction of the xenon lamp 501, tungsten lamp 508 Light 516 is generated in one direction, and light 517 is generated in the second direction of tungsten lamp 508.

The first fiber input connector 503, the second fiber input connector 507, the third fiber input connector 509, and the fourth fiber input connector 513 constitute a light combining device, and the light combining device may be bifurcated or branched. After the light 514 generated in the first direction of the xenon lamp 501 passes through the short pass filter 502, the visible light containing the 656.1 nm spike spectrum is filtered to obtain a gentle blue and ultraviolet spectrum, that is, the light 514 generated in the first direction of the xenon lamp 501. The light is coupled into the optical fiber through the first fiber input connector 503, and then enters the fiber output connector 504 of the light combining device. The light 515 generated in the second direction of the xenon lamp 5 01 passes through the 400 nm band pass filter 505 to generate a 400 nm blue portion spectrum. The portion of the light passing through the variable light intensity device of the xenon lamp 501-motor-driven variable diaphragm 506 adjusts the appropriate light intensity, enters the optical fiber through the second fiber input connector 507, and enters the fiber output connector 504 of the light combining device; After the light 516 generated in the first direction of the lamp 5 08 passes through the visible attenuation filter 509, the visible portion thereof is attenuated to balance its relative intensity with the ultraviolet light and the near-infrared light emitted by the tungsten lamp 508; The intensity of ultraviolet, visible, and near-infrared light, the visible portion is not saturated with a spectrometer that uses CCD or CMOS as a detector; the attenuated visible and ultraviolet and near-infrared light passes through The fiber input connector 510 is coupled into the fiber, and then enters the fiber output connector 504 of the light combining device. After the light 517 generated in the second direction of the tungsten lamp 508 passes through the long pass filter 511, the ultraviolet light and the visible light are filtered to obtain the near infrared. Spectral, the portion of the light is passed through the tungsten lamp 508 variable light intensity device-motor driven variable diaphragm 512 to adjust the appropriate light intensity, then enters the optical fiber through the fourth fiber input connector 513, and then enters the optical fiber output connector 504 of the light combining device. . Thus, at the fiber output connector 504 of the light combining device, the ultraviolet light and blue light spectrum obtained in the first direction of the xenon lamp 501, the 400 nm blue light partial spectrum obtained in the second direction of the xenon lamp 501, and the first direction of the tungsten lamp 508 can be obtained. The ultraviolet light, the attenuated visible light and the near-infrared light and the near-infrared light spectrum obtained by the second direction of the tungsten lamp 508 are superimposed to obtain an overall smooth, wide-band and near-infrared light intensity including ultraviolet light, visible low beam and infrared light. Broadband spectrum. By using the broadband spectrum with a spectrometer using CCD or CMOS as a detector for spectral measurement, a relatively high signal-to-noise ratio can be obtained at near-infrared light. In addition, when increasing the overall light source intensity (including ultraviolet light, visible light and near-infrared light), in a large dynamic range The inner visible portion is not saturated with such spectrometers.

[0058] Preferably, the light combining device may be composed of a first two-in-one Y-type fiber, a second two-in-one Y-type fiber, and a third two-in-one Y-type fiber respectively having two input connectors and one output connector. . The two input connectors of the first two-in-one Y-type optical fiber respectively serve as the first optical fiber input connector 503 and the second optical fiber input connector 507 of the light combining device; the two input connectors of the second two-in-one Y-type optical fiber respectively serve as the light combining The third fiber input connector 510 and the fourth fiber input connector 513 of the device; the two input connectors of the third two-in-one Y-type fiber are respectively outputted from the first two-in-one γ-type fiber and the second two-in-one Y-type fiber The connector is connected, and the output connector of the third 2-in-1 Y-type fiber is the fiber output connector 504 of the light combining device.

[0059] The light generated in the first direction of the xenon lamp 501 passes through the short pass filter 502 and is coupled into one of the input connectors of the first two-in-one Y-type fiber, and the light generated in the second direction of the xenon lamp 501 passes through the 400 nm band pass. The filter 505 is post-coupled into the other input connector of the first 2-in-1 Y-type fiber; the light generated in the first direction of the tungsten lamp 508 passes through the visible attenuation filter 509 and is coupled into the second 2-in-1 Y-type fiber. One of the input connectors, the light generated in the second direction of the tungsten lamp 508 passes through the long pass filter 511 and is coupled into the other input connector of the second two-in-one Y-type fiber; the output connector of the first two-in-one Y-type fiber is connected. One of the input connectors of the third two-in-one Y-type fiber, the output connector of the second two-in-one Y-type fiber is connected to the other input connector of the third two-in-one Y-type fiber, in the third two-in-one Y-type fiber The output connector output includes a broad, broad spectrum of ultraviolet, visible, and near-infrared light, broadband and near-infrared light intensity that is nearly doubled.

[0060] In this embodiment, the light is coupled to the input or output of the fiber optic connector for direct coupling or coupling with a lens.

Embodiment 2

As shown in FIG. 6, the broadband spectral light source in this embodiment includes a xenon lamp 501, a short pass filter 502, a first optical fiber input connector 503 of the light combining device, an optical fiber output connector 504 of the light combining device, and a 400 nm band. Pass filter 505, xenon lamp variable light intensity device - motor drive wheel type gradient neutral filter 601, second optical fiber input connector 507 of light combining device, tungsten lamp 508, visible attenuation filter 509, a third optical fiber input connector 510 of the optical device, a long pass filter 511, a tungsten light 508 variable light intensity device-motor driven wheeled gradient neutral filter 602, a fourth optical fiber input connector 513 of the light combining device, The light 514 generated in the first direction of the xenon lamp 501, the light 515 generated in the second direction of the xenon lamp 501, the light 516 generated in the first direction of the tungsten lamp 508, and the light 517 generated in the second direction of the tungsten lamp 508. The first fiber input connector 503, the second fiber input connector 507 of the light combining device, the third fiber input connector 509, and the fourth fiber input connector 513 constitute a light combining device, and the light combining device may be a bifurcation Or split style.

[0063] After the light 514 generated in the first direction of the xenon lamp 501 passes through the short pass filter 502, the visible light containing the 656.1 nm spike spectrum is filtered to obtain a gentle blue and ultraviolet spectrum, that is, the first direction of the xenon lamp 501. The light 514 is coupled to the optical fiber via the first fiber input connector 503, and then enters the fiber output connector 504 of the light combining device. The light 515 generated in the second direction of the xenon lamp 501 passes through the 400 nm band pass filter 505 to generate a 400 nm blue portion. Spectral, the part of the light is adjusted by the device of the variable light intensity of the xenon lamp-motor-driven wheeled gradient neutral filter 601, and then enters the fiber through the second fiber input connector 507, and then enters the fiber of the light combining device. Output connector 504, after the light 516 generated in the first direction of the tungsten lamp 508 passes through the visible attenuation filter 509, the visible portion thereof is attenuated to balance its relative intensity with the ultraviolet light and the near-infrared light emitted by the tungsten lamp 508; The overall light source intensity includes the intensity of ultraviolet light, visible light, and near-infrared light, which is not saturated with a spectrometer that uses CCD or CMOS as a detector; The reduced visible light and ultraviolet light and near-infrared light are coupled into the optical fiber through the third optical fiber input connector 510, and then enter the optical fiber output connector 504 of the light combining device, and the light 517 generated in the second direction of the tungsten lamp 508 passes through the long pass filter 511. , wherein the ultraviolet light and the visible light are filtered to obtain a near-infrared spectrum, and the portion of the light is adjusted by the tungsten light 508 variable light intensity device-motor driven wheeled gradient neutral filter 602 to adjust the appropriate light intensity, after the fourth The fiber optic input connector 513 enters the fiber and enters the fiber optic output connector 504 of the light combining device. Thus, at the fiber output connector 504 of the light combining device, the ultraviolet light and blue light spectrum obtained in the first direction of the xenon lamp 501, the 400 nm blue light partial spectrum obtained in the second direction of the xenon lamp 501, and the first direction of the tungsten lamp 508 can be obtained. The ultraviolet light, the attenuated visible light and the near-infrared light and the near-infrared light spectrum obtained by the second direction of the tungsten lamp 508 are superimposed to obtain an overall smooth, wide-band and near-infrared light intensity including ultraviolet light, visible low beam and infrared light. Broadband spectrum. By using this broadband spectrum to perform spectrometry with a spectrometer using CCD or CMOS as a detector, a relatively high signal-to-noise ratio can be obtained at near-infrared light. In addition, when the overall light source intensity (including ultraviolet light, visible light, and near-infrared light) is increased, the visible light portion does not saturate such a spectrometer over a large dynamic range.

[0064] In this embodiment, the light is coupled to the input or output of the fiber optic connector for direct coupling or coupling with a lens.

Embodiment 3

As shown in FIG. 7, the broadband spectral light source in this embodiment includes a xenon lamp 501, a short pass filter 502, a first fiber input connector 503 of the light combining device, an optical fiber output connector 504 of the light combining device, and a 400 nm band. Pass filter 505, xenon lamp variable light intensity device - motor drive wedge plate pair 701, second optical input of the light combining device Head 507, tungsten lamp 508, visible attenuation filter 509, third fiber input connector 510 of the light combining device, long pass filter 511, tungsten lamp 508 variable light intensity device - motor driven wedge plate pair 702, The fourth fiber input connector 513 of the light combining device, the light 514 generated in the first direction of the xenon lamp 501, the light 515 generated in the second direction of the xenon lamp 501, the light 516 generated in the first direction of the tungsten lamp 508, and the second direction of the tungsten lamp 508 The generated light 517. The first fiber input connector 503, the second fiber input connector 507 of the light combining device, the third fiber input connector 509, and the fourth fiber input connector 513 constitute a light combining device, and the light combining device may be bifurcated or branched.

After the light 514 generated in the first direction of the xenon lamp 501 passes through the short pass filter 502, the visible light containing the 656.1 nm spike spectrum is filtered to obtain a gentle blue and ultraviolet spectrum, that is, the light 514 generated in the first direction of the xenon lamp 501. The light is coupled into the optical fiber via the first fiber input connector 503, and then enters the fiber output connector 504 of the light combining device. The light 515 generated in the second direction of the xenon lamp 501 passes through the 400 nm band pass filter 505 to generate a 400 nm blue portion spectrum. Part of the light passing through the variable light intensity device of the xenon lamp-motor driven wedge plate pair 701 adjusts the appropriate light intensity, enters the optical fiber through the second fiber input connector 507, and enters the fiber output connector 504 of the light combining device, the tungsten lamp 508 After the light 516 generated in the first direction passes through the visible attenuation filter 509, the visible portion thereof is attenuated to balance its relative intensity with the ultraviolet light and the near-infrared light emitted by the tungsten lamp ₅₀₈ ; when the overall light source intensity is increased, including ultraviolet light, The intensity of visible light and near-infrared light 吋, the visible light portion is not saturated with a spectrometer using CCD or C MOS as a detector; the attenuated visible light and ultraviolet light and near-infrared light pass through The fiber input connector 510 is coupled into the fiber, and then enters the fiber output connector 504 of the light combining device. After the light 517 generated in the second direction of the tungsten lamp 508 passes through the long pass filter 511, the ultraviolet light and the visible light are filtered to obtain the near infrared. The spectrum, the portion of the light is adjusted by the tungsten light 508 variable light intensity device-motor driven wedge plate pair 702 to adjust the appropriate light intensity, then enters the optical fiber through the fourth fiber input connector 513, and then enters the optical fiber output connector 504 of the light combining device. . Thus, at the fiber output connector 504 of the light combining device, the ultraviolet light and blue light spectrum obtained in the first direction of the xenon lamp 501, the 400 nm blue light partial spectrum obtained in the second direction of the xenon lamp 501, and the first direction of the tungsten lamp 508 can be obtained. The ultraviolet light, the attenuated visible light and the near-infrared light and the near-infrared light spectrum obtained by the second direction of the tungsten lamp 508 are superimposed to obtain an overall smooth, wide-band and near-infrared light intensity including ultraviolet light, visible low beam and infrared light. Broadband spectrum. By using the broadband spectrum with a spectrometer using CCD or CMOS as a detector for spectral measurement, a relatively high signal-to-noise ratio can be obtained at near-infrared light. In addition, when the overall light source intensity (including ultraviolet light, visible light, and near-infrared light) is increased, the visible light portion does not saturate such a spectrometer over a large dynamic range. [0068] In this embodiment, the light is coupled to the input or output of the fiber optic connector for direct coupling or coupling with a lens.

[0069] Embodiment 4

As shown in FIG. 8, the broadband spectral light source in this embodiment includes a xenon lamp 501, a short pass filter 502, a first optical fiber input connector 503 of the light combining device, an optical fiber output connector 504 of the light combining device, and a 400 nm band. a pass filter 505, a second fiber input connector 507 of the light combining device, a tungsten lamp 508, a visible attenuation filter 509, a third fiber input connector 510 of the light combining device, a long pass filter 511, a light combining device The fourth optical fiber input connector 513, the light 514 generated in the first direction of the xenon lamp 501, the light 515 generated in the second direction of the xenon lamp 501, the light 516 generated in the first direction of the tungsten lamp 508, and the light generated in the second direction of the tungsten lamp 508 517. The first fiber input connector 503, the second fiber input connector 507 of the light combining device, the third fiber input connector 509, and the fourth fiber input connector 513 constitute a light combining device, and the light combining device may be bifurcated or branched.

[0071] After the light 514 generated in the first direction of the xenon lamp 501 passes through the short pass filter 502, the visible light containing the 656.1 nm spike spectrum is filtered to obtain a gentle blue and ultraviolet spectrum, that is, the first direction of the xenon lamp 501. The light 514 is coupled to the optical fiber via the first fiber input connector 503, and then enters the fiber output connector 504 of the light combining device. The light 515 generated in the second direction of the xenon lamp 501 passes through the 400 nm band pass filter 505 to generate a 400 nm blue portion. The portion of the light is adjusted to a suitable intensity by changing the distance D1 between the second fiber input connector 507 and the xenon lamp 501, and then enters the fiber through the second fiber input connector 507, and then enters the fiber output connector 504 of the light combining device, tungsten. After the light 516 generated in the first direction of the lamp 508 passes through the visible attenuation filter 509, the visible portion thereof is attenuated to balance its relative intensity with the ultraviolet light and the near-infrared light emitted by the tungsten lamp 508; when the overall light source intensity is increased, including ultraviolet light The intensity of light, visible light, and near-infrared light, which is not saturated with spectrometers that use C CD or CMOS as detectors; the attenuated visible and ultraviolet and near-infrared The light is coupled into the optical fiber through the third fiber input connector 510, and then enters the fiber output connector 504 of the light combining device. The light 517 generated in the second direction of the tungsten lamp 508 passes through the long pass filter 511, wherein the ultraviolet light and the visible light are filtered. The near-infrared spectrum is obtained, and the portion of the light is adjusted to a suitable light intensity by changing the distance D2 between the fourth fiber input connector 513 and the tungsten lamp 508, and then enters the fiber through the fourth fiber input connector 513, and then enters the fiber of the light combining device. Output connector 504. Thus, at the fiber output connector 504 of the light combining device, the ultraviolet light and blue light spectrum obtained in the first direction of the xenon lamp 501, the 400 nm blue light partial spectrum obtained in the second direction of the xenon lamp 501, and the first direction of the tungsten lamp 508 can be obtained. The ultraviolet light, the attenuated visible light and the near-infrared light and the near-infrared light spectrum obtained by the second direction of the tungsten lamp 508 are superimposed to obtain an overall smoothness including ultraviolet light, visible low beam and infrared light. Wideband and near-infrared light intensity almost doubled the broadband spectrum. By using the broadband spectrum with a spectrometer using a CCD or CM OS as a detector for spectral measurement, a relatively high signal-to-noise ratio can be obtained at near-infrared light. In addition, when the overall light source intensity (including ultraviolet light, visible light, and near-infrared light) is increased, the visible light portion does not saturate such a spectrometer over a large dynamic range.

[0072] In this embodiment, the light is coupled to the input or output of the fiber optic connector for direct coupling or coupling with a lens.

Embodiment 5

As shown in FIG. 9, the broadband spectral light source in this embodiment includes a xenon lamp 501, a short pass filter 502, a first fiber input connector 503 of the light combining device, an optical fiber output connector 504 of the light combining device, and a 400 nm band. a pass filter 505, a second fiber input connector 507 of the light combining device, a tungsten lamp 508, a visible attenuation filter 509, a third fiber input connector 510 of the light combining device, a long pass filter 511, a light combining device The fourth optical fiber input connector 513, the light 514 generated in the first direction of the xenon lamp 501, the light 515 generated in the second direction of the xenon lamp 501, the light 516 generated in the first direction of the tungsten lamp 508, and the light generated in the second direction of the tungsten lamp 508 517. The first fiber input connector 503, the second fiber input connector 507 of the light combining device, the third fiber input connector 509, and the fourth fiber input connector 513 constitute a light combining device, and the light combining device may be bifurcated or branched. The second fiber input connector 507 and the fourth fiber input connector 513 have a fiber-bonding structure in the fiber, and the fiber coupling structure is composed of two fibers coupled to each other.

[0075] After the light 514 generated in the first direction of the xenon lamp 501 passes through the short pass filter 502, the visible light containing the 656.1 nm spike spectrum is filtered to obtain a gentle blue and ultraviolet spectrum, that is, the first direction of the xenon lamp 501. The light 514 is coupled to the optical fiber via the first fiber input connector 503, and then enters the fiber output connector 504 of the light combining device. The light 515 generated in the second direction of the xenon lamp 501 passes through the 400 nm band pass filter 505 to generate a 400 nm blue portion. Spectral, the portion of the light enters the optical fiber through the second fiber input connector 507, and adjusts the appropriate light intensity by changing the distance D3 of the two coupled fibers in the fiber-bonding structure of the second fiber input connector 507, and then enters the light combining device. After the optical output connector 504, the light 516 generated in the first direction of the tungsten lamp 508 passes through the visible attenuation filter 50 9 , the visible portion thereof is attenuated to balance the relative intensity of the ultraviolet light and the near-infrared light emitted by the tungsten lamp 508; When increasing the intensity of the overall light source including the intensity of ultraviolet light, visible light and near-infrared light, the visible light portion will not saturate the spectrometer with CCD or CMOS as the detector; the attenuation is visible Light and ultraviolet light and near-infrared light are coupled into the optical fiber via the third fiber input connector 510, and then enter the fiber output connector 504 of the light combining device. After the light 517 generated in the second direction of the tungsten lamp 508 passes through the long pass filter 511, Purple The external light and the visible light are filtered out to obtain a near-infrared spectrum, and the portion of the light enters the optical fiber through the fourth optical input interface 513, and is adjusted by changing the distance D4 of the two coupled optical fibers in the fiber-bonding structure of the fourth optical fiber input connector 513. After a suitable light intensity, the fiber output connector 504 of the light combining device is again accessed. Thus, at the fiber output connector 504 of the light combining device, the ultraviolet light and blue light spectrum obtained in the first direction of the xenon lamp 501, the 400 nm blue light partial spectrum obtained in the second direction of the xenon lamp 501, and the first direction of the tungsten lamp 508 can be obtained. The ultraviolet light, the attenuated visible light and the near-infrared light and the near-infrared light spectrum obtained by the second direction of the tungsten lamp 508 are superimposed to obtain an overall smooth, wide-band and near-infrared light intensity including ultraviolet light, visible low beam and infrared light. Broadband spectrum. By using the broadband spectrum with a spectrometer using CCD or CMOS as a detector for spectral measurement, a relatively high signal-to-noise ratio can be obtained at near-infrared light. In addition, when the overall light source intensity (including ultraviolet light, visible light, and near-infrared light) is increased, the visible light portion does not saturate such a spectrometer over a large dynamic range.

[0076] In this embodiment, the light is coupled to the input or output of the fiber optic connector for direct coupling or coupling with a lens.

Embodiment 6

As shown in FIG. 10, the broadband spectral light source in this embodiment includes a xenon lamp 501, a short pass filter 502, a first fiber input connector 503 of the light combining device, an optical fiber output connector 504 of the light combining device, and a 400 nm band. a pass filter 505, a second fiber input connector 507 of the light combining device, a tungsten lamp 508, a visible attenuation filter 509, a third fiber input connector 510 of the light combining device, a long pass filter 511, a light combining device The fourth optical fiber input connector 513, the light 514 generated in the first direction of the xenon lamp 501, the light 515 generated in the second direction of the xenon lamp 501, the light 516 generated in the first direction of the tungsten lamp 508, and the light generated in the second direction of the tungsten lamp 508 517. The first fiber input connector 503, the second fiber input connector 507 of the light combining device, the third fiber input connector 509, and the fourth fiber input connector 513 constitute a light combining device, and the light combining device may be bifurcated or branched. A second collimator lens is provided in the second fiber input connector 507 and the fourth fiber input connector 513.

[0079] After the light 514 generated in the first direction of the xenon lamp 501 passes through the short pass filter 502, the visible light containing the 656.1 nm spike spectrum is filtered to obtain a gentle blue and ultraviolet spectrum, that is, the first direction of the xenon lamp 501. The light 514 is coupled to the optical fiber via the first fiber input connector 503, and then enters the fiber output connector 504 of the light combining device. The light 515 generated in the second direction of the xenon lamp 501 passes through the 400 nm band pass filter 505 to generate a 400 nm blue portion. The portion of the light is adjusted to a suitable light intensity by varying the distance D5 between the collimator lens and the optical fiber in the second fiber input connector 507, and then enters the optical fiber through the second fiber input connector 507, and then enters the light of the light combining device. The fiber output connector 504, after the light 516 generated in the first direction of the tungsten lamp 508 passes through the visible attenuation filter 509, the visible portion thereof is attenuated to balance the relative intensity of the ultraviolet light and the near-infrared light emitted by the tungsten lamp 508; Increasing the overall light source intensity including the intensity of ultraviolet light, visible light, and near-infrared light, the visible light portion is not saturated with a spectrometer that uses CCD or CMOS as a detector; the attenuated visible light and ultraviolet light and near-infrared light are input through the third optical fiber. The connector 510 is coupled into the optical fiber, and then enters the optical fiber output connector 504 of the light combining device. After the light 517 generated in the second direction of the tungsten lamp 508 passes through the long pass filter 511, the ultraviolet light and the visible light are filtered to obtain the near infrared spectrum. The portion of the light is adjusted to a suitable light intensity by changing the distance D6 between the collimator lens and the optical fiber in the fourth optical fiber input connector 513, and then enters the optical fiber through the fourth optical fiber input connector 513, and then enters the optical fiber output connector 504 of the light combining device. . Thus, at the fiber output connector 504 of the light combining device, the ultraviolet light and blue light spectrum obtained in the first direction of the xenon lamp 501, the 400 nm blue light partial spectrum obtained in the second direction of the xenon lamp 501, and the first direction of the tungsten lamp 508 can be obtained. The obtained ultraviolet light, the attenuated visible light and the near-infrared light and the near-infrared light spectrum obtained by the second direction of the tungsten lamp 508 are superimposed to obtain an overall smooth, wide-band and near-infrared light intensity including ultraviolet light, visible low beam and infrared light. Double the broadband spectrum. By using the broadband spectrum with a spectrometer using CCD or CMOS as a detector for spectral measurement, a relatively high signal-to-noise ratio can be obtained at near-infrared light. In addition, when the overall light source intensity (including ultraviolet light, visible light, and near-infrared light) is increased, the visible light portion does not saturate such a spectrometer over a large dynamic range.

[0080] In this embodiment, the light is coupled to the input or output of the fiber optic connector for direct coupling or coupling with a lens.

Example 7

As shown in FIG. 11, the broadband spectral light source in this embodiment includes a xenon lamp 501, a short pass filter 502, a first fiber input connector 503 of the light combining device, an optical fiber output connector 504 of the light combining device, and a 400 nm band. a pass filter 505, a second fiber input connector 507 of the light combining device, a tungsten lamp 508, a visible attenuation filter 509, a third fiber input connector 510 of the light combining device, a long pass filter 511, a light combining device The fourth optical fiber input connector 513, the light 514 generated in the first direction of the xenon lamp 501, the light 515 generated in the second direction of the xenon lamp 501, the light 516 generated in the first direction of the tungsten lamp 508, and the light generated in the second direction of the tungsten lamp 508 517. The first fiber input connector 503, the second fiber input connector 507 of the light combining device, the third fiber input connector 509, and the fourth fiber input connector 513 constitute a light combining device, and the light combining device may be bifurcated or branched. Fibers of different core diameters are disposed in the second fiber input connector 507 and the fourth fiber input connector 513.

[0083] After the light 514 generated in the first direction of the xenon lamp 501 passes through the short pass filter 502, it contains a 656.1 nm spike spectrum. The visible light is filtered out to obtain a smooth blue and ultraviolet spectrum, that is, light 514 generated in the first direction of the xenon lamp 501, which is coupled into the optical fiber via the first fiber input connector 503, and then enters the fiber output connector 504 of the light combining device, The light 515 generated in the second direction of the lamp 501 passes through the 400 nm band pass filter 505 to generate a 400 nm blue portion spectrum, which is adjusted by adjusting the appropriate light intensity by combining the fibers with different diameters and adjusting the distance D7 of the different diameter twisted fibers. The second fiber input connector 507 enters the optical fiber, and then enters the fiber output connector 504 of the light combining device. After the light 516 generated in the first direction of the tungsten lamp 508 passes through the visible attenuation filter 509, the visible portion thereof is attenuated to balance the The relative intensity of the ultraviolet light and the near-infrared light emitted by the tungsten lamp 508; when the intensity of the overall light source is increased, including the intensity of ultraviolet light, visible light, and near-infrared light, the visible light portion is not saturated with the spectrometer using CCD or CMOS as a detector. The attenuated visible light is coupled to the ultraviolet light and the near-infrared light via the third fiber input connector 510 into the fiber, and then enters the fiber of the light combining device. The output connector 504, the light 517 generated in the second direction of the tungsten lamp 508 passes through the long-wavelength filter 511, wherein the ultraviolet light and the visible light are filtered to obtain a near-infrared spectrum, and the portion of the light is twisted by different diameters and adjusted. After adjusting the appropriate light intensity by the distance D8 of the diameter of the optical fiber, the fiber enters the optical fiber through the fourth fiber input connector 513, and then enters the fiber output connector 504 of the light combining device. In this way, at the fiber output connector 504 of the light combining device, the ultraviolet light and blue light spectrum obtained in the first direction of the xenon lamp 501 and the 400 nm blue light portion spectrum obtained in the second direction of the xenon lamp 501 can be utilized by the principle of combining multiple spectra. The ultraviolet light obtained by the first direction of the tungsten lamp 508, the attenuated visible light and the near-infrared light and the near-infrared light obtained by the second direction of the tungsten lamp 508 are superposed to obtain an overall smooth, wide band including ultraviolet light, visible low beam and infrared light. Moreover, the near-infrared light intensity almost doubles the broadband spectrum. By using the broadband spectrum with a spectrometer using CCD or CMOS as a detector for spectral measurement, a relatively high signal-to-noise ratio can be obtained at near-infrared light. In addition, when the overall light source intensity (including ultraviolet light, visible light, and near-infrared light) is increased, the visible light portion does not saturate such a spectrometer over a large dynamic range. The method uses near-infrared light multi-coupling, visible light and ultraviolet light coupling less, that is, the optical fiber used in the second direction of the tungsten lamp 508 uses a larger core diameter fiber to balance the light intensity of each part to overcome the CCD or COMS A defect in which the near-infrared light portion is relatively weak due to low responsivity at the near-infrared light.

[0084] In this embodiment, the light is coupled to the input or output of the fiber optic connector for direct coupling or coupling with a lens.

[0085] In the present invention, the output light intensity of the tungsten lamp 508 can be adjusted by adjusting its driving current to change the second source current to change the ultraviolet spectrum and the visible spectrum of the second source. The intensity of the near-infrared spectrum obtained by the near-infrared spectrum and the second direction of the second source, so that the intensity of the two segments is matched with the smooth blue and ultraviolet spectral intensity obtained from the first source to obtain a smooth, broadband and near-integral The broad spectrum of infrared light intensity is almost doubled.

[0086] The optical fiber output connectors of the xenon lamp and the tungsten lamp 508 may also be respectively provided with neutral light attenuating sheets for balancing the light intensity.

[0087] In the present invention, the use of near-infrared light multi-coupling (such as with a larger core fiber, etc.), visible light and ultraviolet light less coupling (such as with a smaller core fiber, etc.), that is, tungsten lamp 508 The fiber used in the two directions uses a fiber with a larger core diameter to balance the light intensity of each part. It is possible to overcome the drawback that the near-infrared light portion of the CCD or COMS at the near-infrared light is relatively weak and the near-infrared light portion is relatively weak.

[0088] The tungsten lamp 508 can be other light sources including ultraviolet light, visible light, and near-infrared light; such as xenon lamps and the like.

The present invention may, of course, be embodied in various other modifications and changes without departing from the spirit and scope of the invention. These respective changes and modifications are intended to fall within the scope of the appended claims.

Claims

Claim

[Claim 1] A broadband spectral light source, comprising:

a first light source, a short pass filter, a 400 nm band pass filter, a second light source, a visible attenuation filter, a long pass filter, and a light combining device, the light combining device comprising four fiber input connectors and a four-in-one optical fiber of a fiber output connector, the first light source is an ultraviolet light source and a blue light source, and the second light source is a light source including ultraviolet light, visible light and near infrared light.

The light generated in the first direction of the first light source passes through the short pass filter to obtain a blue light and an ultraviolet spectrum, and the blue light and ultraviolet spectrum are coupled into the first fiber input connector of the light combining device;

The light generated in the second direction of the first light source passes through the 400 nm band pass filter to obtain a 400 nm blue portion spectrum, and the 400 nm blue portion spectrum passes through the first variable light intensity device or changes the first light source and a coupling distance of the optical transmission device between the optical fiber output connectors of the light combining device to adjust the light intensity and output;

The light generated in the first direction of the second light source passes through the visible attenuation filter to obtain light that is partially attenuated by the visible light, and the light that is partially attenuated by the visible light is coupled into the third optical fiber input connector of the light combining device. ;

The light generated in the second direction of the second light source passes through the long pass filter to obtain a near-infrared spectrum, and the near-infrared spectrum passes through the second variable light intensity device or changes the second light source to the a coupling distance of the optical transmission device between the optical fiber output connectors of the optical device to adjust the light intensity and output;

The light combining device combines light entering by the four fiber input connectors and outputs an overall flat broadband spectrum including ultraviolet light, visible light, and near-infrared light through the fiber output connector.

[Claim 2] The light source according to claim 1, wherein the light combining device comprises a first two-in-one Y-type optical fiber and a second two-in-one Y respectively having two input connectors and one output connector. Type fiber and third 2-in-1 Y-type fiber;

Two input connectors of the first two-in-one Y-type optical fiber respectively serve as the first unit of the light combining device a fiber input connector and a second fiber input connector;

The two input connectors of the second two-in-one Y-type optical fiber respectively serve as a third optical fiber input connector and a fourth optical fiber input connector of the light combining device;

The two input connectors of the third two-in-one Y-type optical fiber are respectively connected to the output connectors of the first two-in-one Y-type optical fiber and the second two-in-one Y-shaped optical fiber, and the third two-in-one Y-type The output connector of the optical fiber is the fiber output connector of the light combining device.

[Claim 3] The light source according to claim 1, wherein the first variable light intensity device of the first light source is a motor driven variable diaphragm, and the motor drives a wheeled gradient neutral filter. Or a motor driven wedge plate pair;

The second variable light intensity device of the second light source is a motor driven variable diaphragm, a motor driven wheeled gradient neutral filter or a motor driven wedge plate pair.

[Claim 4] The light source according to claim 1, wherein

The light generated in the second direction of the first light source adjusts the light intensity thereof by changing a distance between the second fiber input connector and the first light source;

The light generated in the second direction of the second light source adjusts its light intensity by changing the distance between the fourth fiber input interface and the second light source.

The light source according to claim 1, wherein the second optical fiber input connector and the optical fiber of the fourth optical fiber input connector are respectively provided with an optical fiber twisting structure; The direction-generated light adjusts its intensity by adjusting the distance of the fiber-coupling structure in the fiber of the second fiber input connector, and the light generated in the second direction of the second source passes through the fiber in the fiber of the fourth fiber input connector. Adjust the strength of the structure by adjusting the distance of the structure.

[Claim 6] The light source according to claim 1, wherein the light generated in the second direction of the first light source is changed by the distance between the collimator lens and the optical fiber in the second fiber input connector. Adjust its strength;

The light generated in the second direction of the second source is adjusted in intensity by varying the distance of the collimator lens in the fourth fiber input connector from the fiber.

[Lighting device 7] The light source according to claim 1, wherein: the second optical fiber input connector The light intensity of the light generated by changing the second direction of the first light source by the fibers of different core diameters; the fourth fiber input joint is configured to change the second direction of the second light source by providing fibers of different core diameters The intensity of the light produced.

[Claim 8] The light source according to claim 7, wherein the method of coupling near-infrared light multi-coupling, visible light, and ultraviolet light is used, that is, the optical fiber used in the second direction of the second light source is Large core fiber to balance the light intensity of each part.

[Claim 9] The light source according to any one of claims 1 to 8, wherein the light combining device is bifurcated or branched; and the light is coupled directly to an input or an output of the optical fiber connector Coupled or coupled with a lens.

[Claim 10] The light source according to any one of claims 1 to 8, wherein an output light intensity of the second light source is adjusted by adjusting a driving current thereof to change a second light source current to change a second light source The intensity of the near-infrared spectrum obtained in the first direction of the ultraviolet spectrum, the visible spectrum and the near-infrared spectrum, and the second direction of the second source.

The light source according to any one of claims 1 to 8, characterized in that the four optical fiber input connectors are further provided with a neutral light attenuating sheet for adjusting the balance light intensity.

The light source according to any one of claims 1 to 8, wherein the first light source is a xenon lamp, a hydrogen lamp or a xenon lamp, and the second light source is a tungsten lamp or a xenon lamp.