WO2016110014A1

WO2016110014A1 - Optical signal receiver

Info

Publication number: WO2016110014A1
Application number: PCT/CN2015/076067
Authority: WO
Inventors: 潘建根
Original assignee: 杭州远方光电信息股份有限公司
Priority date: 2015-01-08
Filing date: 2015-04-08
Publication date: 2016-07-14

Abstract

Disclosed is an optical signal receiver. Several light through locations (2) are arranged on a photoelectric receiving component (1), and the photoelectric receiving component (1) and the light through locations (2) receive optical signals to be measured, so as to realize the detection of the performance of various light colors on the same optical receiving surface. The compact design of the light through locations (2) and the photoelectric receiving component (1) can effectively reduce measurement errors caused by non-uniform distribution of spatial light colors; and in addition, the photoelectric receiving component (1) and the measurement device (3) can correct each other, thereby further increasing the measurement accuracy. The optical signal receiver has the characteristics of a compact structure, high measurement accuracy, powerful test function, etc., and can be widely applied to various high-accuracy measurement occasions, in particular to various high-accuracy small-sized/miniature optical detection test occasions.

Description

Optical signal receiver

Technical field

The invention relates to the technical field of optical radiation measurement, in particular to an optical signal receiver.

Background technique

Conventional optical signal receivers generally only implement one measurement function. In applications where multiple measurement functions are required, multiple receivers are generally used for combined measurement. The existing combination includes setting a plurality of receivers, and the position between the receivers is not strictly required, and only the optical signal to be measured can be received, such as the patent of the publication number CN101290246A; or the position between the receivers There is a requirement. For example, in the patent of CN202676283U, the light receiving port of the spectrometer is arranged side by side with the photometric probe, and the spatial light intensity distribution and the color distribution can be simultaneously measured by one sampling; or the respective receivers are set in the same sampling device, such as In the patent publication No. CN103344329A, the spectrometric module and the photometric module are arranged in the same sampling device.

However, in the above prior art, regardless of the setting mode, different receivers are independent components. For high-precision measurement occasions, different receivers need to maintain the same test conditions, which has high mechanical requirements for the instrument. It is difficult to ensure that the sampling surface or even the photosensitive surface of different receivers are consistent, and it is more difficult to realize the light of the same nature measured by different receivers, thereby causing measurement errors; in addition, for a light source or a light color distribution with a sharp change in light color distribution Non-uniform small-sized light sources, such as LED lamp beads, can have large differences in light color distribution at small angles that can be discerned by the human eye. Different receivers with different geometrical dimensions have large geometrical differences, and are collected by different receivers. The optical signal itself has a large difference, including the spectral composition error, which brings a large error to the measurement result and affects the measurement accuracy.

Summary of the invention

In order to overcome the defects existing in the prior art, the present invention aims to provide a novel optical signal receiver with multiple detection functions integrated, and the light receiving ports of the plurality of photodetectors are disposed on the same optical receiving surface to ensure the sampling signal. The consistency, which greatly improves the measurement accuracy, is suitable for various high-precision measurement occasions; the integrated design and compact structure are ideal detection solutions for various small and micro test systems.

An optical signal receiver according to the present invention is characterized in that it comprises a photo-receiving component, one or more light-passing portions are disposed on the photo-electric receiving component, and the photo-electric receiving component and the light-passing portion are to be tested Optical signal.

The invention provides a plurality of light-passing portions on the photoelectric receiving component, and at the same time that the photoelectric receiving component receives the light signal, a corresponding optical measuring device is disposed behind the plurality of light-passing portions to realize measurement of various optical properties of the light signal to be measured, such that The plurality of optical measuring devices realize the measurement of the optical signal to be measured on the same optical receiving surface, ensuring that the height of the sampled optical signal to be measured is consistently reduced, and the measurement error caused by the uneven distribution of the spatial light color is greatly reduced, thereby The optical signal receiver of the integrated design can more accurately measure the light color parameters of the optical signal to be measured.

The photoelectric receiving component may be a photoelectric receiving component, or may be composed of a plurality of photoelectric receiving components; the light passing portion may be one light passing through, or may be multiple passing light, and the light passing portion may be a light passing circular hole. The light can also be a slit that passes through the light. Compared with the prior art, the invention has the advantages of compact structure, high measurement accuracy and powerful testing function, and can be widely applied to various high-precision measurement occasions, especially in various high-precision small/micro detection test occasions.

The invention can be further defined and improved by the following technical measures:

As a technical solution, the light passing portion is disposed at the center of the photoelectric receiving component, which can reduce the influence of the difference of the positions of the two sampling devices on the measurement result.

As a technical solution, at least one measuring device is included, and the light passing portion is directly a light entrance port of the corresponding measuring device, and the measuring device directly receives the light signal from the light passing portion, and the light signal directly enters the measuring point through the light passing portion. Device, if the measuring device is a spectral measuring device, the light passing point is directly the light entrance of the spectrum measuring device, that is, the entrance slit. Or, after the light passing, the light guiding device is disposed, and the light signal to be measured is introduced into the light entrance port of the corresponding measuring device, and the light is then passed into the measuring device to enter the measuring device for measurement.

It should be noted that the present invention may include a plurality of measuring devices, for example, a spectral measuring device for measuring a spectral power distribution of an optical signal passing through the light, a brightness measuring device for measuring the brightness of the light source, and the like, in the photoelectric receiving A corresponding light-passing portion is opened on the component, and the light-measuring signal is respectively introduced into different measuring devices to measure, and the same signal and different light-color performance can be simultaneously measured, and the measuring speed is fast and the accuracy is high.

Preferably, the spectrum measuring device comprises a beam splitting device and an array detector, and the light signal to be measured from the light entrance port is split by the light splitting device and then received by the array detector.

Preferably, the film is directly coated on the photoreceiving member, and the photoreceiving member or a filter is disposed in front of the photoreceiving member to change the spectral response sensitivity curve of the photoelectric output of the photoreceiving member with respect to the incident light. A typical application example is that the photoreceiving component and the filter constitute a photometric probe.

As a technical solution, including a microprocessor, the microprocessor is electrically connected or wirelessly connected to the photoelectric receiving component and the measuring device, and the microprocessor receives the measurement signal from the measuring device and the photoelectric receiving component. The calibration process is performed to finally obtain the exact value of the measurement result. Specifically, if the photoelectric receiving component is a photosensitive surface of the photometric probe, the measuring device is a spectral measuring device, and the photometric measurement value measured by the photoelectric receiving component and the spectral measurement value of the spectral measuring device can be mutually corrected to improve the measurement accuracy. For example, the measured spectral correction value can be used to obtain the spectral analysis correction coefficient, and the spectral mismatch error of the photometric probe can be corrected to obtain a high-accuracy optical metric value. The specific calibration steps are as follows:

a microprocessor obtains a light metric of the optical signal to be measured measured by the photoelectric receiving component;

b. The microprocessor obtains a relative spectral power distribution of the optical signal to be measured measured by the spectrum measuring device;

c. Calculate the spectral resolution correction factor K1 and calculate according to the following formula:

Where V(λ) is a known CIE standard spectral light efficiency function, s(λ) _rel is the relative spectral sensitivity of the photoreceiving component that has been accurately measured in advance for incident light, and P(λ) _s is used to calibrate the photoelectric The known relative spectral power distribution of the standard light source of the receiving component, P(λ) _t, is the relative spectral power distribution of the optical signal to be measured measured by the spectral measuring device.

d. Multiply the optical metric measured by the photoreceiving component by K1 to obtain an accurate optical metric of the optical signal to be measured.

Furthermore, the absolute spectral power distribution of the optical signal to be measured can also be obtained by using the measured value of the photoreceiving component in combination with the relative spectral power distribution obtained by the spectroscopic measuring device. The specific approach is:

a microprocessor obtains a relative spectral power distribution of the optical signal to be measured measured by the spectral measuring device;

b. The microprocessor obtains the measured value of the photoelectric receiving component;

c. Calculate the absolute spectral power distribution of the optical signal to be measured:

Where S is the measured value of the photoreceiving member, and s(λ) is the spectral sensitivity of the photoreceiving member.

In order to achieve mutual correction, the measurement band of the spectrometer should correspond to the detection band of the photoreceiving component. For example, if the measurement band of the spectrometer is covering the detection band of the photoreceiving component, the measurement value in the detection band of the entire photoreceiving component can be corrected; if the detection band of the photoreceiving component and the measurement band of the spectrometer Similarly, the absolute spectral power distribution of the optical signal to be measured can be obtained by using the photometric value of the photoreceiving component in combination with the relative spectral power distribution obtained by the spectroscopic measuring device.

Preferably, the photoelectric receiving member is a silicon photo cell, and the photo receiving member may be a photosensitive surface of a probe such as illuminance or brightness. Silicon photocells have the characteristics of wide linear dynamic range, high efficiency, small size, light weight and long life.

As a typical application, the light is received at the center of the photoelectric receiving component, the light receiving surface is a silicon photo cell, and an optical color filter that changes the sensitivity curve of the spectral response of the optical signal to be measured is disposed in front of the silicon photo cell ( Directly coating the silicon photocell or setting a filter in front of it, the light passing is the entrance slit of the spectrum measuring device, and the spectrum is measured. The quantity device includes a grating for splitting light and an array detector for receiving spectral signals. A more optimized solution is to further integrate the microprocessor for processing the optical signals measured by the optoelectronic receiving components and the spectrometric measuring device, and the two are mutually corrected to obtain higher measurement accuracy.

In summary, the present invention discloses an optical signal receiver in which a plurality of light-passing portions are disposed on a photoelectric receiving component, and the photoelectric receiving component and the light-passing portion receive a light signal to be measured, and a plurality of light colors can be realized on the same optical receiving surface. Performance detection. The compact design of the light-passing part and the photoelectric receiving part can effectively reduce the measurement error caused by the spatial light color distribution; in addition, the different light color performance measurement values under the same test conditions can be mutually corrected to further improve the measurement accuracy. The optical signal receiver has the characteristics of ingenious design, compact structure, high measurement accuracy and powerful testing function, and can be widely applied to various high-precision measurement occasions, especially various high-precision small/micro detection and testing occasions.

DRAWINGS

Figure 1 is a schematic view showing the structure of Embodiment 1;

Figure 2 is a schematic view showing the positional relationship between the photoelectric receiving member and the light passing portion;

Figure 3 is a schematic view showing the structure of Embodiment 2.

1-photoelectric receiving part, 2-pass light, 3-measuring device, 4-input port, 5-microprocessor, 6-splitting device, 7-array detector, 8-lens.

detailed description

Example 1

As shown in FIG. 1 and FIG. 2, the photoelectric receiving component 1 of the optical signal receiver disclosed in the embodiment is an illuminance probe, the measuring device 3 is a spectrometer, and the light passing portion 2 is a light slit of the spectrometer, and the whole system includes: an illuminance probe. , spectrometer and microprocessor 5. The spectrometer comprises an entrance port 4, a beam splitting device 6 and an array detector 7, and an array probe 7 of the illuminance probe and the spectrometer is electrically connected to the microprocessor 5.

During the measurement, the light signal to be measured is irradiated on the optical signal receiver, and a part of the optical signal enters the spectrometer 4 through the optical slit 2, and the light split by the grating is irradiated onto the array detector 7, and the array detector 7 converts the optical signal into The electrical signal is transmitted to the microprocessor 5, which is processed by the microprocessor 5 to obtain the spectral power distribution of the light to be measured 3. At the same time, another part of the optical signal is collected by the illuminance probe, and the optical signal is converted into an electrical signal and transmitted to the microprocessor 5, and processed by the microprocessor 5 to obtain a metric of the optical signal to be measured. The microprocessor 5 first combines the obtained illumination metric with the relative spectral power distribution to obtain an absolute spectral power distribution of the optical signal to be measured, and then corrects the illuminance value in the measurement region by calculating the correction coefficient. Calculate the spectral resolution correction factor K1 according to the following formula:

Where V(λ) is a known CIE standard spectral light efficiency function, S(λ) _rel is the relative spectral sensitivity that the illuminance probe has accurately measured beforehand, and P(λ) _s is the standard light source used to calibrate the illuminance probe. The relative spectral power distribution is known, and P(λ) _t is the measured relative spectral power distribution of the optical signal to be measured.

By multiplying the illuminance measured by the illuminance probe by K1, an accurate metric of the optical signal to be measured can be obtained.

Example 2

As shown in FIG. 3, the present embodiment differs from the first embodiment in that the photoreceiving member 1 is a brightness probe, and the optical slit of the spectrometer is placed close to the light passing portion 2, and the lens 8 is disposed in front of the brightness probe.

During the measurement, the light to be measured is irradiated to the optical signal receiver through the lens 8, and the optical signal passing through the light passing portion 2 enters the spectrometer through the optical slit.

Claims

An optical signal receiver, comprising: a photo-receiving member (1) on which a light-passing portion (2) is disposed, said photo-receiving member (1) and a light-passing portion At (2), the light signal to be measured is received.
The optical signal receiver according to claim 1, characterized in that said light passing portion (2) is provided at the center of the photoreceiving member (1).
The optical signal receiver according to claim 1, characterized in that it comprises a measuring device (3), which is directly connected to the light entrance (4) of the corresponding measuring device (3), and is measured. The device (3) directly receives the optical signal from the light passing portion (2); or the light passing portion (2) is provided with a light guiding device, and the light guiding device introduces the light signal to be measured into the corresponding measuring device (3) The entrance to the light (4).
The optical signal receiver according to claim 3, characterized in that said measuring device (3) is a spectral measuring device.
The optical signal receiver according to claim 4, wherein said spectral measuring means measures the relative spectral power distribution of the optical signal to be measured, and the photoelectric receiving component (1) is based on the measured relative spectral power distribution. The measured values are corrected to obtain accurate measurement results.
The optical signal receiver according to claim 4, wherein the measured value of said photoreceiving member (1) corrects the relative spectral power distribution measured by the spectroscopic measuring device to obtain an absolute spectrum of the optical signal to be measured. Power distribution.
Optical signal receiver according to claim 1 or 5 or 6, characterized in that it comprises a microprocessor (5) for receiving the received signal from the measuring device (3) and receiving The measurement signal of the component (1) is subjected to correction processing.
The optical signal receiver according to claim 1 or 5 or 6, wherein the measuring band of said spectroscopic measuring device corresponds to the detecting band of the photoreceiving member (1).
The optical signal receiver according to claim 8, wherein said measuring band of said spectroscopic measuring device covers a detecting band of said photoreceiving member (1).
The optical signal receiver according to claim 4, wherein said spectral measuring device comprises an optical entrance (4), a spectroscopic device (6) and an array detector (7), from the optical entrance (4) The light signal to be measured is split by the spectroscopic device (6) and received by the array detector (7).
The optical signal receiver according to claim 10, wherein said light passing portion (2) is directly a light entrance port (4) of the spectrum measuring device, and the light entrance port (4) is a spectrum measuring device. Incident slit.
The optical signal receiver according to claim 1 or 5 or 6, wherein said photoreceiving member (1) is a silicon photo cell.
The optical signal receiver according to claim 1, wherein a film is directly coated on said photoreceiving member (1) or a filter is disposed in front of said photoreceiving member (1).