WO2019127548A1

WO2019127548A1 - Light mixing device, ultraviolet light source working indicator, and ultraviolet light source system

Info

Publication number: WO2019127548A1
Application number: PCT/CN2017/120297
Authority: WO
Inventors: 何宗江; 贾志强
Original assignee: 深圳前海小有技术有限公司; 深圳市海司恩科技有限公司
Priority date: 2017-12-29
Filing date: 2017-12-29
Publication date: 2019-07-04

Abstract

A light mixing device, comprising a cylinder (10) opened at the bottom extremity. The cylinder (10) is provided therein with a partition (11) provided in the axial direction of the cylinder (10). The partition (11) divides the cylinder (10) into a left cavity (12) and a right cavity (13). A visible light source (121) is provided within the left cavity (12). A fluorescent body (131) is provided within the right cavity (13). Provided on the upper extremity of the cylinder (10) is a light mixing component (30) used for receiving a visible light of the visible light source (121) and a fluorescent light of the fluorescent body (131) and transmitting a mixed light of the visible light and the fluorescent light. The employment of the light mixing device of the present invention allows inexpensive indication of a working condition of a deep ultraviolet light source of a disinfection and sterilization device, and allows qualitative indication of the optical power outputted by a light source LED.

Description

Light mixing device, ultraviolet light source working indicator and ultraviolet light source system

Technical field

The invention relates to the field of ultraviolet monitoring technology, in particular to a light mixing device, an ultraviolet light source working indicator and an ultraviolet light source system.

Background technique

Ultraviolet light sources (usually UV-LEDs are commonly used) are commonly used in a variety of sterilization products, such as hospital operating rooms, wards, and mobile water sterilizers, which are often required to be sterilized with UV light. However, in the use of these sterilization equipment and products, the intensity of the irradiation of the ultraviolet irradiation lamp is not visually or sensible, and is measured by an ultraviolet irradiator. However, the existing ultraviolet irradiator can only measure the irradiation intensity, and cannot measure the distance between the ultraviolet lamp and the target object, and can not accurately measure the time for the ultraviolet lamp to illuminate, and can not record the relevant data. Therefore, it is often not known whether the disinfection is qualified during the entire sterilization process, and once the disinfection failure may cause immeasurable losses and consequences. Because this kind of disinfection is required to meet certain conditions (ultraviolet intensity, ultraviolet irradiation time, distance between the ultraviolet lamp and the target) to achieve the disinfection requirements. After the UV lamp is turned on, the staff cannot detect and record these data in the work area. At present, the ultraviolet intensity detector can only detect the ultraviolet intensity, cannot measure other parameters, and cannot record related data.

In order to be able to perform preliminary monitoring of the working state of the ultraviolet light source used in these devices or scenes, there are usually more indication card detection methods, which are to be performed after the ultraviolet lamp is turned on for 5 minutes. The ultraviolet intensity indicator card is placed at a distance of 1 meter from the vertical tube, and then irradiated by the ultraviolet lamp for 1 minute. Finally, the UV intensity is qualitatively judged according to the color change of the indicator card to meet the standard strength for disinfection. However, although the method steps are simple, there are many problems in the actual operation. For example, the light source part of some devices cannot be turned on at any time to allow the indicator card to be placed at any time, and it is still impossible to accurately control the illumination of the ultraviolet lamp. The time and the time the card is illuminated, and the manual operation can cause physical damage to the operator due to excessive exposure to ultraviolet light for a long time. Therefore, the above situation causes the staff to be unable to easily know the working condition of the UV-LED, so that the working state and the luminous power of the UV-LED cannot be grasped in real time, which affects the good control and progress of the sterilization and sterilization process.

Summary of the invention

The main object of the present invention is to provide a light mixing device and an ultraviolet light source working indicator including the light mixing device, aiming at accurately measuring the working condition of the ultraviolet light source used in the sterilization and sterilization equipment, and better performing sterilization and disinfection. Process control.

In order to achieve the above object, the present invention provides a light mixing device comprising a cylinder having an open end, the cylinder being provided with a partition disposed along an axial direction of the cylinder, the partition separating the cylinder into a left chamber and Right chamber; among them,

a light source is disposed in the left chamber, and a phosphor is disposed in the right chamber;

The upper end of the cylinder is provided with a light mixing device for receiving the visible light of the visible light source and the fluorescence of the phosphor, and emitting mixed light of visible light and fluorescence.

Preferably, the top of the left chamber is provided with a visible light transmitting member; the visible light transmitting member includes a first light shielding portion having a middle hole, and a first collimating lens disposed in the hole of the first light shielding portion;

And/or, the top of the right chamber is provided with a fluorescent light transmissive member; wherein the fluorescent light transmissive member comprises a second light shielding portion having a middle hole, and a second light portion disposed in the hole of the second light shielding portion Straight lens.

Preferably, the light mixing device is a light mixing lens; or

The light mixing device is a light mixing cavity; and the light mixing cavity has an light entrance port and a light exit port; wherein the light entrance port is configured to receive visible light of the visible light source and fluorescence of the phosphor, the light output The port is used to emit the mixed light of the visible light and the fluorescent light.

Preferably, the light exit port is a slit grating; or, the light exit port is provided with a collecting lens; and/or,

A light polarizing plate is further disposed on the light exit opening.

Preferably, the light mixing device comprises a first total reflection prism and a second total reflection prism, and an exit pupil; wherein

a first isosceles surface of the first total reflection prism is disposed in parallel with the first collimating lens; a first isosceles surface of the second total reflection prism is disposed in parallel with the second collimating lens ;

The light mixing device further includes a first light sheet having visible light and transmitting fluorescence, and a second light sheet capable of reflecting fluorescence and transmitting visible light;

The first light sheet is for reflecting visible light emitted from the second isosceles surface of the first total reflection prism to the light exit pupil; and the second light sheet is for emitting the second isosceles surface of the second total reflection prism The fluorescence is reflected to the exit pupil.

Preferably, the light mixing device includes a first total reflection prism and a second total reflection prism, and the second total reflection prism has a bevel surface that reflects visible light and transmits fluorescence;

The first isosceles surface of the first total reflection prism is disposed in parallel with the first collimating lens, and the second isosceles surface is disposed in parallel with the first isosceles surface of the second total reflection prism;

The oblique surface of the second total reflection prism is opposite to the second collimating lens and disposed at an angle of 45 ^o .

Preferably, an ultraviolet light transmissive plate is mounted on the opening of the lower end of the cylinder; and/or

The light mixing device further includes a detecting fiber; the probe end of the detecting fiber is configured to collect ultraviolet light of the ultraviolet light source to be monitored, and the output end is opposite to the phosphor; and/or

The phosphor is a phosphor layer, a fluorescent plate, or a fluorescent film; and/or,

The inner side wall of the right chamber is a diffuse reflection side wall.

In addition to the above-described light mixing device of the present invention, the present invention further provides an ultraviolet light source operation indicator including the above-described light mixing device structure.

Preferably, the ultraviolet light source operation indicator further comprises a constant current constant voltage power supply for supplying the visible light source; and/or

Also included is a first photosensor for detecting illumination of the visible light source; and/or,

And an optical signal processing unit, the optical signal unit includes a second photosensor, a power source, and a data processing module, and the second photosensor, a power source, and a data processing module are electrically connected by a wire to form a current loop;

The second photosensor is configured to detect a light intensity of the mixed light emitted by the light mixing device, and generate a digital electrical signal;

The data processing module is configured to calculate a luminous intensity of the monitored ultraviolet light source according to the digital electrical signal.

By using the ultraviolet light source working indicator of the present invention, it is possible to indicate the operation of the deep ultraviolet light source of the sterilization and disinfection apparatus at low cost, and also to qualitatively indicate the optical power of the output of the light source LED. Fully consider the influence of ultraviolet intensity, ultraviolet irradiation time, the distance between the ultraviolet lamp and the target on the disinfection, and promote the good control and progress of the sterilization process.

Based on the above-mentioned ultraviolet light source working indicator, the present invention further proposes an ultraviolet light source system composed of the above-mentioned ultraviolet light source working indicator and the ultraviolet light source monitored thereby. The system consisting of an ultraviolet light source and a work indicator can be directly used for various sterilization products (such as a hospital operating room, a ward, a mobile water sterilizer, etc.), which can facilitate the workers in real time. The operation of the deep ultraviolet light source of the monitoring device can also qualitatively indicate the optical power of the output of the light source LED, and promote the good control and progress of the sterilization and disinfection process by the staff.

DRAWINGS

1 is a schematic structural view of a light mixing device according to an embodiment of the present invention;

2 is a schematic structural view of a light mixing device according to another embodiment of the present invention;

3 is a color spectrum of light mixing of a fluorescent plate of different light intensities with a visible light source according to the present invention;

4 is a schematic structural view of a light mixing device according to still another embodiment of the present invention;

Figure 5 is a plan view of the visible light transmissive member of Figure 4;

6 is a schematic structural view of a light mixing device according to still another embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a light mixing device according to still another embodiment of the present invention; FIG.

FIG. 8 is a schematic structural view of an optical signal processing unit in an ultraviolet light source working indicator of the present invention.

Detailed ways

The implementation, functional features, and advantages of the present invention will be further described in conjunction with the embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The present invention provides a light mixing device for use as a device for performing light mixing when monitoring the operation of an ultraviolet light source in a sterilization and sterilization apparatus. The structure thereof can be referred to as shown in FIG. 1-2; and includes a cylinder 10, the cylinder 10 The shape is designed in the shape of a generally conventional square column, a cylindrical shape or the like; further, an ultraviolet light transmitting plate 20 is disposed at the lower end of the cylindrical body 10 for transmitting ultraviolet rays into the cavity inside the cylindrical body 10 to be detected. The purpose of the ultraviolet light transmissive plate 20 is to prevent other light from the lower end from entering the interior of the light mixing device, causing background interference to ultraviolet light or visible light set therein. Therefore, it can be seen from the above that if the scene used by the device has no interference light to enter the device except the ultraviolet light source to be tested, the lower end of the cylinder 10 can be directly set to be open without installing the above. Ultraviolet light transmissive plate 20. When implemented or used, technicians can use it according to their own needs.

The inside of the cylinder 10 is internally provided with a partition 11 disposed along the axial direction of the cylinder 10, and the inside of the cylinder 10 is partitioned into a left chamber 12 and a right chamber 13; wherein the left chamber 12 is installed and visible. The light source 121 and the right chamber 13 are designed such that the lower end is open for the lower ultraviolet light transmitting plate 20 to transmit the deep ultraviolet light of the ultraviolet light source to be tested, and the inner end is provided with the phosphor 131. At the same time, the inner sidewall is further designed as a diffuse reflection sidewall, and the diffuse reflection sidewall can form a uniform light field in the inner space of the right chamber 13. After the phosphor 131 receives the ultraviolet light transmitted by the ultraviolet transparent panel 20, The intensity of the luminescence after excitation is generated by the excitation of the phosphor 131, and the intensity of the luminescence is related to the intensity of the original excitation light, which is advantageous for improving the accuracy of the detection of the amount of light. The visible light source 121 is used to supply component light that is optically mixed with the fluorescence of the phosphor 131.

In the above embodiment, the diffuse reflection side wall of the right chamber 13 can be realized by attaching a high diffuse reflection film on the side wall, and the right chamber 13 may be made of a suitable material and side thereof. The wall process has a diffusely reflective structure that allows the sidewall itself to have a diffuse reflection function. In addition, in the implementation, the phosphor 131 disposed on the top wall is preferably coated with a layer of phosphor on the top wall to form a fluorescent layer, which has the characteristics of good thermal stability, and the angle of light radiation generated is relatively complete. It can be applied to illuminating colors which can adjust different red, blue, yellow, etc., and is used in the present invention for subsequent adjustment of the required mixed light color, which is convenient for accurate detection; at the same time, in order to enhance the illuminating effect and illuminate The uniformity of color and the error of subsequent detection results, the size of the powder particles of the phosphor used herein is desirably in the range of 1 nm to 100 μm, such as about 10 nm to 30 μm, 100 nm to 30 μm, 500 nm to 30 μm, or about 1 μm. Up to 30μm. In another embodiment, a fluorescent plate or a fluorescent film may also be employed to serve as the above phosphor 131.

Finally, at the upper end of the cylinder 10 is provided a light mixing device 30, which functions on the one hand for generating the illumination of the visible light source 121 in the left chamber 12 and after the phosphor 131 in the right chamber 13 is excited. The illuminating mixing produces mixed light, and on the other hand, the resulting mixed light is further ejected to facilitate detection. In the embodiment of the present invention, the light mixing lens 30a of FIG. 1 can be used; in another embodiment of FIG. 2, the light mixing cavity 30b having the light exit opening 31b at the top can be used, and the light mixing cavity 30b is empty inside. The cavity and the lower end are provided for receiving the visible light from the visible light source 121 and the fluorescent body 131 as the light entrance port, and then the space in the cavity is used for the light of the visible light source 121 and the fluorescence in the right chamber 13. The fluorescent light of the body 131 is optically mixed. In addition, it should be noted that the phosphor 131 does not emit light by itself, generates fluorescence according to the ultraviolet irradiation of the monitored ultraviolet light source, and the lower end is directly used for receiving ultraviolet irradiation of the monitored ultraviolet light source; however, in order to facilitate installation during implementation And the connection can be carried out in a better manner; the light mixing device can separately comprise or configure an optical fiber, and the probe end of the optical fiber is opposite to the monitored ultraviolet light source for collecting ultraviolet light of the ultraviolet light source to be tested; then the output end of the optical fiber Opposite to the above-mentioned phosphor, the collected ultraviolet light is transmitted to the phosphor to excite and generate fluorescence.

When the light mixing lens 30a in the embodiment of Fig. 1 is employed, the lens itself receives light from the left chamber 12 and the right chamber 13, and the lens is automatically mixed and transmitted from above; moreover, from Fig. 1 of the present invention It can also be seen that the light mixing lens 30a of the present invention adopts a plano-convex lens, which is more advantageous for lifting the lighting effects from the left chamber 12 and the right chamber 13 below than the lenticular lens. Meanwhile, based on the effect of the implementation of the present invention, the material of the light mixing lens 30a is glass or plastic, preferably glass, which has the risk of absorbing short-wave ultraviolet rays without causing yellowing or aging.

When the light mixing chamber 30b having the light exit port 31b in the embodiment of Fig. 2 is employed, the light emitted from the visible light source 121 in the left chamber 12 and the light generated after the phosphor 131 in the right chamber 13 is excited are mixed in this light. After the mixed light is synthesized in the cavity 30b, it is emitted from the light exit port 31b at the top, and is detected.

It can be seen from the above that the invention adopts the method of detecting the color and brightness information of the mixed light to analyze the working state and the luminous power of the ultraviolet light source in the original sterilization and sterilization apparatus. The method of hybrid light detection is based on the mixing of several different colors of light, and the mixed light exhibits different colors as each scale changes, as shown in FIG. In the present invention, the different colors of the final mixed light correspond to different ultraviolet light sources to emit power values, so that the detection result of the mixed light can be used to visually judge whether the ultraviolet light source in the original sterilization and sterilization device is in an effective working range. For example, when the optical power of the ultraviolet light source is less than the first 30%, the color of the mixed light is reddish. When the optical power of the ultraviolet light source is less than 5%, since the fluorescence is very weak, when the light of the visible LED is displayed, the user is prompted to replace it. UV light source beads.

Further, in addition to the embodiment of the optical mixing chamber 30b of Fig. 2, the light emitted from the light exit port 31b is divergent light and is easily disturbed by the environment. Therefore, in order to improve the convenience of detection, the light exit port 31b is provided/ A collecting lens 32b is mounted. The condensing lens 32b converges the mixed light emitted from the light exit port 31b, thereby increasing the amount of light collected after the detection, and also increasing the light intensity. With the optical mixing chamber 30b of this embodiment, the difference from the other of the above is that the use of the light mixing lens 30a is reduced, and the cost can be reduced. At the same time, the light mixing area is set in this manner, and then the light exit port 31b is provided, but the light exit port 31b has a function of allowing only the mixed light to be emitted. Therefore, the unmixed light is occluded and absorbed; in order to achieve this effect, in this embodiment, the visible light source 121 (usually using visible light LED) and the phosphor layer 131 are correspondingly adjusted in the left chamber 12 and the right chamber 13. The angle is such that it has an angle of inclination that satisfies the above requirements. Moreover, in the embodiment, the light exit port 31b of the embodiment can adopt another design in the embodiment of FIG. 4, and the light exit port is formed into a slit grating, and the slit grating can promote the injection mixing and facilitate the detection.

Further, in the embodiment of the present invention, a light mixing mode of another embodiment is further proposed. Referring to FIG. 4, in order to facilitate the collection of visible light of the left chamber 12, a visible light transmissive member 122 is mounted on the top end of the left chamber 12. Referring to FIG. 5, the shape and structure of the visible light transmissive member 122 includes an annular first light blocking portion 1221 and a first collimating lens 1222 mounted in the annular first light blocking portion 1221. Similarly, a similar fluorescent member 132 is also mounted on the top end of the right chamber 13. The fluorescent diffuser 132 includes an annular second light blocking portion 1321 and a second alignment mounted in the annular second light blocking portion 1321. Lens 1322. It can also be seen from this that the visible light transmissive member 122 and the fluorescent transmissive member 132 can also be advantageously applied to the embodiment of Figures 1 and 2. It can also be seen from the top view of FIG. 5 of the present invention that since the shape of the visible light transmissive member 122 is adapted to the shape of the top of the left chamber 12, the annular first light blocking portion 1221 may not be a ring shape, and It is an annular shape that is adapted to its cross section as the cross-sectional shape of the left chamber 12 changes. Likewise, the shape of the second light blocking portion 1321 also corresponds to the shape of the top cross section of the right chamber 13.

In another embodiment of the present invention, the structure of the light mixing device 30 is further referred to FIG. 6. The light mixing device 30 includes a first total reflection prism 33, a second total reflection prism 34, and an exit pupil 35. It should be noted that the total reflection prism is a standard optical component, and has the characteristics of a triangular prism with a right angle and a right angle. It has two isosceles and a beveled surface, and is characterized by vertical injection into one of them. The light from the waist is reflected vertically from the beveled surface and vertically from the other isosceles. The present invention utilizes this feature that one of the isosceles faces of the first total reflection prism 33 is disposed in parallel with the first collimating lens 1222 such that visible light emitted from the optical axis of the first collimating lens 1222 can be vertically incident thereon. The opposite isosceles is then projected perpendicularly from the other isosceles. Similarly, one of the isosceles faces of the second total reflection prism 34 is disposed in parallel with the second collimating lens 1322 such that the fluorescence emitted from the optical axis of the second collimating lens 1322 can be perpendicularly incident into the opposite isosceles. Face, then shoot perpendicularly from the other isosceles. In the present invention, the fluorescence and visible light transmitted from the prism are reflected by the two reflection sheets to be mixed with the light exit pupil 35, and the light is mixed. The two reflection sheets include a visible light reflection sheet 331 for reflecting visible light emitted from the first total reflection prism 33 to the exit pupil 35, and for reflecting fluorescence emitted from the second total reflection prism 34 to the exit pupil. A fluorescent reflection sheet 341 of 35. In order to avoid the cross-transmission of the two kinds of light, the visible light reflecting sheet 331 can be made of glass and a visible light reflecting film is disposed on the reflecting surface thereof, so that visible light is not transmitted from the visible light reflecting sheet 331 to the second side of the right side. The side of the total reflection prism 34; likewise, the fluorescent reflection sheet 341 is disposed in the same manner, so that the side of the first total reflection prism 33 on the left side can be prevented from being transmitted to the left side; and both are well reflected to the exit pupil 35 for convergence. mixing. In the present invention, it is necessary to point out and explain that in order to ensure that the visible light and the fluorescent light are smoothly reflected to the exit pupil 35, respectively, without the visible light reflecting sheet 331 blocking the fluorescent light and the fluorescent reflecting sheet 341 blocking the visible light, the present invention The visible light reflecting sheet 331 to be used needs to have the property of fluorescence transmission, and the fluorescent reflecting sheet 341 needs to have a property of transmitting visible light, so that no blocking or interference occurs between them, thereby ensuring smooth mixing. The selective transmission/selective reflection of the reflection sheet can be prepared by using a wavelength-selective light sheet, and the above functions can be realized by recognizing a specific wavelength.

Alternatively, in still another embodiment of the present invention, the structure of the light mixing device 30 is further referred to FIG. 7. In this embodiment, the light mixing device 30 includes a first total reflection prism 33a and a second total reflection prism 34a; but the two reflections The prism is disposed in a different manner from the previous embodiment in that one of the isosceles faces of the first total reflection prism 33a is disposed in parallel with the first collimating lens 1222 so as to be emitted from the optical axis of the first collimating lens 1222. Visible light can be incident perpendicularly into the opposite isosceles and then perpendicularly from the other isosceles. The second total reflection prism 34a is disposed in such a manner that the oblique surface (the oblique surface has a property of reflecting visible light, transmitting fluorescence, specifically explained similarly to the above-mentioned reflection sheet) is disposed opposite to the second collimating lens 1322, But not parallel, but at an angle of 45 degrees; and the one isosceles surface of the second total reflection prism 34a (ie, the isosceles on the left side in FIG. 7) is opposite to the isosceles surface of the first total reflection prism 33a. In parallel, the result is that the fluorescence emitted from the second collimating lens 1322 directly passes through the second total reflection prism 34a and is emitted from the upper isosceles surface. On the other hand, the visible light emitted from the first collimating lens 1222 is continuously reflected by the first total reflection prism 33a and reflected by the second total reflection prism 34a, and is also emitted from the upper isosceles surface from the second total reflection prism 34a. When the visible light and the fluorescent exit light path coincide, light mixing can be achieved.

It can be seen from the above implementation that the color and brightness information of the final mixed light is detected by the above, and if the brightness of the detected ultraviolet light source is not changed, the intensity of the visible light source 121 of another component light is also changed. This will cause a change in the color of the mixed light that is monitored, which will result in an indication error in the illumination of the original UV source. Therefore, the light emission of the visible light source 121 is kept constant. In the practice of the present invention, the work indicator may include powering the visible light source 121 using a constant current constant voltage power supply (not shown) to ensure a stable output of the visible light source 121.

Further, in order to reduce the error caused by the visible light source 121, the visible light source 121 maintains the same brightness at the factory during the whole process, and assists the feedback adjustment mode in addition to the constant current constant voltage power supply, specifically including the left cavity. a first photosensor (not shown) for detecting the illumination of the visible light source 121 in the chamber 12, the data collected by the first photosensor is fed back to the constant current constant voltage power supply, and the constant current constant voltage power supply outputs a current according to the feedback signal. The visible light source 121 is used to ensure that the output of the visible light source 121 is always stable.

The above is the details of the structure realization of the light mixing device of the present invention. The scene used by the light mixing device of the present invention is used to detect the original monitored ultraviolet light after detecting the mixed light, but is not necessarily limited to the above. In other cases, it can also be used in a variety of other scenes where the light mixing is required, such as in some optical experiments or in a light mixer in an optical device.

Based on the above light mixing device, the present invention further provides an ultraviolet light source working indicator including the above light mixing device. On the one hand, it can make up for the details of the subsequent conversion of the light mixing device into the indicator and the calculation process to make the product more convenient. Finally, in order to eliminate the detection of the color/light information of the mixed light emitted from the light mixing device 30, it is susceptible to various interference factors such as human eye recognition/external light, thereby resulting in accurate monitoring results of the final ultraviolet light source. In the case of reduced performance, the present invention adds an optical signal processing unit 40 to the ultraviolet light source working indicator in addition to the above-mentioned light mixing device. The hardware structure block diagram is shown in FIG. 8 , and the optical signal processing unit 40 is used to mix light. The mixed light emitted by the device 30 is received and analyzed, and then the data of the detection result is directly output, and the number is visually displayed on the display/display, which makes it easier for the worker to obtain the result information. Preferably, in the present invention, the optical signal processing unit 40, the structure of which is shown in FIG. 8, includes a second photosensor 41, a power source 42 and a data processing module 43, and a second photosensor 41, a power source 42 and a The data processing module 43 is electrically connected by wires to form a current loop. The power source 42 is a DC power source; the second photosensor 41 is configured to detect the mixed light transmitted by the light mixing device 30 (in the embodiment of FIG. 1 , the light emitted by the light mixing lens 30a is in the embodiment of FIG. 2 The light emitted from the light exit port 31b is converted into a digital electrical signal; the data processing module 43 is configured to receive the digital electrical signal of the second photosensor 41, and perform calculation and processing to generate a luminous intensity of the monitored ultraviolet light source. The calculation of the illuminating condition of the original light source may include a detailed calculation process of first calculating the illuminance intensity data of the component photo illuminator 131 based on the received light intensity data of the mixed light detected by the second photosensor 41 (because the visible light source 121 The illuminating light is fixed; and the received original ultraviolet light source transmitted from the light-transmitting plate 20 is calculated according to the conversion efficiency of the phosphor 131 itself and the attenuation function (corresponding to the material of the phosphor 131 itself). The light intensity is finally calculated based on the ratio of the amount of light from the original ultraviolet light source of the light-transmitting plate 20 to the total light emission, and the overall light intensity of the light source of the ultraviolet light source 221 is calculated. From the principle of mixed light color generation, if the intensity of the ultraviolet light source 221 (ultraviolet LED) ultraviolet LED is getting weaker, the color of the mixed light will change, and the data result of the obtained digital electrical signal will also change accordingly.

Further, in the above embodiment, when the second photosensor 41 receives the mixed light transmitted through the detection light transmission window, in a non-closed environment, it is easily interfered by other light, resulting in inaccurate final results. In order to eliminate interference in this aspect, the setting mode/detection mode of the second photosensor 351 can be adjusted. For example, it can be adopted. On the one hand, the environment around the exiting optical path of the light mixing device 30 is detected to be in a closed light-shielding environment, so as to eliminate the background light-emitting interference in the environment; on the other hand, the detection type can be adjusted on the detection mode. For example, the second photosensor 41 uses a polarized light sensor to detect only a specific polarized light, and a polarizing plate is added corresponding to the light path exiting direction of the light mixing device 30, so that the second photosensor 41 can only detect the light from the second photosensor 41. The light mixing device 30 generates polarized light of the mixed light, thereby preventing the background light in the environment from interfering with the detection result.

Meanwhile, in order to facilitate the mounting and fixing of the ultraviolet light source working indicator of the present invention in the sterilization and disinfecting apparatus, the cylinder 10 is provided with a fastening connector 14 for fixed connection with the outside, which is adopted in the embodiment of FIG. The connecting member 14 is a fixed post 141/fixed clip 141. In the implementation, the card is inserted into an adapted card seat disposed near the light source of the sterilization and disinfection device, so that a stable fixed connection can be realized. Of course, the manner of engagement may be inconvenient to disassemble. Under the same concept, the fixed post may be glued to the side wall of the sterilization device or screwed to the side wall of the sterilization device. Generally, the device has one side of the ultraviolet light transmissive plate 20 located in the light source light chamber of the sterilization and disinfection device, and the top end is located on the outer side for the user to observe; the user judges the UVLED in the light chamber by watching the change of the color of the indicator light. The working condition and the area where the optical power is located.

Of course, based on the functional function of the connection, the upper connector 14 can also include a threaded connection 142, as shown in Figure 2, with the ends added with threads and a matching mounting nut. Further, a sealing ring can be installed between the nut and the fixing post to achieve a very good airtight setting effect, and more applications can be applied.

Based on the above-mentioned ultraviolet light source working indicator of the present invention, the present invention further provides an ultraviolet light source system composed of the above-mentioned ultraviolet light source working indicator and the ultraviolet light source monitored thereby. The system consisting of an ultraviolet light source and a work indicator can be directly used for various sterilization products (such as a hospital operating room, a ward, a mobile water sterilizer, etc.), which can facilitate the workers in real time. The operation of the deep ultraviolet light source of the monitoring device can also qualitatively indicate the optical power of the output of the light source LED, and promote the good control and progress of the sterilization and disinfection process by the staff.

The above are only the preferred embodiments of the present invention, and are not intended to limit the scope of the invention, and the equivalent structure or equivalent process transformations made by the description of the present invention and the drawings are directly or indirectly applied to other related technical fields. The same is included in the scope of patent protection of the present invention.

Claims

A light mixing device comprising a cylinder open at the lower end, wherein the cylinder body is provided with a partition plate disposed along an axial direction of the cylinder body, the partition plate separating the cylinder body into a left chamber and a right chamber ;among them,

a light source is disposed in the left chamber, and a phosphor is disposed in the right chamber;

The upper end of the cylinder is provided with a light mixing device for receiving the visible light of the visible light source and the fluorescence of the phosphor, and emitting mixed light of visible light and fluorescence.
The light mixing device according to claim 1, wherein a top surface of the left chamber is provided with a visible light transmitting member; the visible light transmitting member includes a first light shielding portion having a middle hole, and is disposed at the first a first collimating lens in the hole in the shading portion;

And/or, the top of the right chamber is provided with a fluorescent light transmissive member; wherein the fluorescent light transmissive member comprises a second light shielding portion having a middle hole, and a second light portion disposed in the hole of the second light shielding portion Straight lens.
The light mixing device according to claim 1 or 2, wherein the light mixing device is a light mixing lens; or

The light mixing device is a light mixing cavity; and the light mixing cavity has an light entrance port and a light exit port; wherein the light entrance port is configured to receive visible light of the visible light source and fluorescence of the phosphor, the light output The port is used to emit the mixed light of the visible light and the fluorescent light.
The light mixing device according to claim 3, wherein the light exit port is a slit grating; or, the light exit port is provided with a collecting lens; and/or

A light polarizing plate is further disposed on the light exit opening.
The light mixing device according to claim 2, wherein said light mixing device comprises a first total reflection prism and a second total reflection prism, and an exit pupil; wherein

a first isosceles surface of the first total reflection prism is disposed in parallel with the first collimating lens; a first isosceles surface of the second total reflection prism is disposed in parallel with the second collimating lens ;

The light mixing device further includes a first light sheet having visible light and transmitting fluorescence, and a second light sheet capable of reflecting fluorescence and transmitting visible light;

The first light sheet is for reflecting visible light emitted from the second isosceles surface of the first total reflection prism to the light exit pupil; and the second light sheet is for emitting the second isosceles surface of the second total reflection prism The fluorescence is reflected to the exit pupil.
A light mixing device according to claim 2, wherein said light mixing means comprises a first total reflection prism and a second total reflection prism, said second total reflection prism having a beveled surface that reflects visible light and transmits fluorescence ;among them,

The first isosceles surface of the first total reflection prism is disposed in parallel with the first collimating lens, and the second isosceles surface is disposed in parallel with the first isosceles surface of the second total reflection prism;

The oblique surface of the second total reflection prism is opposite to the second collimating lens and disposed at an angle of 45o.
The light mixing device according to any one of claims 1 or 2 or 4 to 6, wherein an ultraviolet translucent plate is mounted on the opening of the lower end of the cylinder; and/or

The light mixing device further includes a detecting fiber; the probe end of the detecting fiber is configured to collect ultraviolet light of the ultraviolet light source to be monitored, and the output end is opposite to the phosphor; and/or

The phosphor is a phosphor layer, a fluorescent plate, or a fluorescent film; and/or,

The inner side wall of the right chamber is a diffuse reflection side wall.
An ultraviolet light source operation indicator for monitoring an ultraviolet light source, comprising the light mixing device according to any one of claims 1 to 7.
The ultraviolet light source operation indicator of claim 8 further comprising a constant current constant voltage power supply for supplying said visible light source; and/or

Also included is a first photosensor for detecting illumination of the visible light source; and/or,

And an optical signal processing unit, the optical signal unit includes a second photosensor, a power source, and a data processing module, and the second photosensor, a power source, and a data processing module are electrically connected by a wire to form a current loop;

The second photosensor is configured to detect a light intensity of the mixed light emitted by the light mixing device, and generate a digital electrical signal;

The data processing module is configured to calculate a luminous intensity of the monitored ultraviolet light source according to the digital electrical signal.
An ultraviolet light source system comprising an ultraviolet light source and the ultraviolet light source operation indicator of claim 8 or 9.