阅读说明：本技术 光学检测光源设计方法及其光源 (Optical detection light source design method and its light source ) 是由 陈全胜 唐旱波 刘尧平 王燕 杜小龙 于 2019-08-26 设计创作，主要内容包括：本发明公开了一种光学检测光源设计方法及其光源,采用LED、氙灯和卤素灯中一种或多种进行组合形成光源,将光源设置在能将光线投射在被测样品上的位置,调整光源的光谱L(λ)与理想光谱I(λ)在六个波段的光谱匹配度都在0.4～2.0之间,光谱匹配度的定义是光源的光谱分别在400-500nm、500-600nm、600-700nm、700-800nm、800-900nm和900-1100nm这六个波段范围实际测试的总辐照度的百分比与理想光谱辐照分布的百分比的比率。本发明提供的设计方法设计出的光源可以直接进行光学测量,减少使用分光设备进行被测样品的光学检测,提升检测效率,具有快速、成本低等优点。(The invention discloses a kind of optical detection light source design method and its light sources, using LED, it is one or more in xenon lamp and halogen lamp to be combined to form light source, light source is arranged in the position that can be incident upon light on sample, adjust light source spectrum L (λ) and ideal spectrum I (λ) six wave bands Spectral matching degree all between 0.4~2.0, the definition of Spectral matching degree is the spectrum of light source respectively in 400-500nm, 500-600nm, 600-700nm, 700-800nm, the ratio of the percentage of the solar global irradiance of this six wavelength band actual tests of 800-900nm and 900-1100nm and the percentage of ideal spectrum irradiation profile.The light source that design method provided by the invention is designed can directly carry out optical measurement, reduce the optical detection that sample is carried out using light-dividing device, promote detection efficiency, have many advantages, such as quick, at low cost.)

1. a kind of optical detection light source design method, it is characterised in that: using in LED, xenon lamp and halogen lamp it is one or more into Row combination forms light source, and light source is arranged in the position that can be incident upon light on sample, adjusts the spectrum L (λ) of light source With ideal spectrum I (λ) six wave bands Spectral matching degree all between 0.4~2.0, the definition of Spectral matching degree is light source Spectrum is respectively in 400-500nm, 500-600nm, 600-700nm, 700-800nm, 800-900nm and 900-1100nm this six The ratio of the percentage of the solar global irradiance of wavelength band actual test and the percentage of ideal spectrum irradiation profile.

2. optical detection light source design method according to claim 1, it is characterised in that: described ideal spectrum I (λ) etc. The quotient of the photodetector responsiveness Q (λ) used in the spectrum G (λ) and sample of sample use environment.

3. optical detection light source design method according to claim 1, it is characterised in that: the sample uses ring The spectrum G (λ) in border is the AM1.5 sunlight spectrum of standard.

4. optical detection light source design method according to claim 1, it is characterised in that: the spectrum L (λ) of the light source with The Spectral matching degree of ideal spectrum I (λ) is between 0.6~1.4.

5. optical detection light source design method according to claim 1, it is characterised in that: the spectrum L (λ) of the light source with The Spectral matching degree of ideal spectrum I (λ) is between 0.75~1.25.

6. a kind of using light source made from optical detection light source design method described in any one of claim 1-5, feature Be, be composed of one or more in LED, xenon lamp and halogen lamp, spectrum L (λ) and ideal spectrum I (λ) at 7 The Spectral matching degree of wave band all between 0.4~2.0, the definition of Spectral matching degree be light source spectrum respectively 400-500nm, This six wavelength band actual tests of 500-600nm, 600-700nm, 700-800nm, 800-900nm and 900-1100nm it is total The ratio of the percentage of irradiation level and the percentage of ideal spectrum irradiation profile.

Technical field

The present invention relates to technical field of optical detection, in particular to a kind of optical detection light source design method and its light source.

Background technique

Optical detection is that the very common detection means of one kind especially in recent years, will be optical in conjunction with photoelectric sensor Signal is converted into the method that digital signal is analyzed and handled and is widely utilized.For example carry out the measurement of structure size, sample The judge etc. of product appearance quality.These detections do not have the spectrum of light source special requirement, and test result is not present in spectrum Any influence.But in partial optical detection, the test result under different wave length is different, therefore the composition situation pair of spectrum Just become very crucial in test result, if only accurate quantitative test can not be then carried out using common light source, such as The reflectivity etc. of sample.The scheme of current use is then to pass through preposition light splitting or postposition point using broadband light source The mode of light is individually measured the optical property under each wavelength in spectrum, is finally had further according to particular problem Body situation provides specific test result.Such as the measurement of the reflectivity of photovoltaic cell or component, using light splitting Photometric method obtains the reflectivity between 300nm~1100nm under each wavelength, finally the sunlight with AM1.5 standard again Spectrum is weighted summation and obtains the reflectivity of final sample.But a large amount of time cost can be not only wasted in this way, while by Lead to holding at high price for detection device in the device of light splitting.

Therefore, it is badly in need of one kind not needing to carry out spectroscopic step, the light source of optical detection can be directly carried out, to reduce light Time and the fund cost for learning detection, improve the efficiency of optical detection.

Summary of the invention

In view of the above deficiencies, the object of the present invention is to provide a kind of optical detection light source design method and its light sources.

To achieve the above object, the technical solution provided by the present invention is:

A kind of optical detection light source design method to be formed using one or more be combined in LED, xenon lamp and halogen lamp The position that can be incident upon light on sample is arranged in light source by light source, adjusts the spectrum L (λ) and ideal spectrum I of light source (λ) six wave bands Spectral matching degree all between 0.4~2.0, the definition of Spectral matching degree is that the spectrum of light source exists respectively This six wavelength band realities of 400-500nm, 500-600nm, 600-700nm, 700-800nm, 800-900nm and 900-1100nm The ratio of the percentage of the solar global irradiance of border test and the percentage of ideal spectrum irradiation profile.

It is a kind of to use light source made from above-mentioned optical detection light source design method, by a kind of in LED, xenon lamp and halogen lamp Or multiple combinations form.

Preferably as one kind of the invention, the ideal spectrum I (λ) is equal to the spectrum G (λ) of sample use environment With the quotient of photodetector responsiveness Q (λ) used in sample.

Preferably as one kind of the invention, the spectrum G (λ) of the sample use environment be the AM1.5 of standard too Solar spectrum.

Preferably as one kind of the invention, the Spectral matching degree of the spectrum L (λ) and ideal spectrum I (λ) of the light source exist Between 0.6~1.4.

Preferably as one kind of the invention, the Spectral matching degree of the spectrum L (λ) and ideal spectrum I (λ) of the light source exist Between 0.75~1.25.

When detecting the reflectivity of sample, because at different wavelengths, the reflectivity R (λ) of sample is not phase With, it is therefore desirable to according to the practical service environment of sample, the reflection of sample is obtained by average weighted mode Rate R.Calculation formula is as follows:

Wherein G (λ) is the spectrum of sample institute use environment, and λ 1 and λ 2 are respectively the start wavelength tested and end wave It is long.The calculation method needs to know the reflectivity of each wavelength under continuous spectrum between λ 1 and λ 2, then carry out integral obtain it is flat Equal reflectivity R.For operating without light splitting, when carrying out overall spectrum measurement, when actual measurement, need to consider entire spectrum Situation, it is also necessary in view of photodetector has different responsivenesses at different wavelengths.Therefore after photodetector The calculation formula for the photoelectric current H being collected into are as follows:

Wherein L (λ) is the spectrum of light source, and Q (λ) is the responsiveness of photodetector.Therefore, if used light source light Spectrum L (λ) meets L (λ)=I (λ)=k1*G (λ)/Q (λ), then has:

It therefore can be directly proportional to optical properties such as the reflectivity of sample by the photoelectric current being collected into.Only need To use a standard sample to carry out calibration can be carried out the optical measurement of sample.In actual light source light spectrum L (λ) and ideal Spectrum I (λ) is unable to reach perfect Spectral matching degree, but in a certain range, by using amendment in measurement process The factor eliminates part light source bring error, so as to reduce the requirement of Spectral matching degree.Two Spectral matching degree are determined Justice is the spectrum of light source respectively in 400-500nm, 500-600nm, 600-700nm, 700-800nm, 800-900nm and 900- The ratio of the percentage of the solar global irradiance of this six wavelength band actual tests of 1100nm and the percentage of ideal spectrum irradiation profile Rate.

The invention has the benefit that the light source that design method provided by the invention is designed can directly carry out optics survey Amount can obtain the optical property of sample, such as reflectivity in the case where not needing light splitting, reduce and use light-dividing device The optical detection of sample is carried out, detection efficiency is promoted, has many advantages, such as quick, at low cost, utilizes extensive popularization and application.

With reference to the accompanying drawing with embodiment, the present invention is further described.

Detailed description of the invention

Fig. 1 is the responsiveness of photodetector used in embodiment 1.

Fig. 2 is design light source light spectrogram and AM1.5 spectrogram in embodiment 1.

Fig. 3 is the responsiveness of photodetector used in embodiment 2.

Fig. 4 is perfect light source spectrogram and measured light spectrogram in embodiment 2.

Specific embodiment