CN203138462U - Optical imaging device of optical volume change signal - Google Patents
Optical imaging device of optical volume change signal Download PDFInfo
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- CN203138462U CN203138462U CN2012204918748U CN201220491874U CN203138462U CN 203138462 U CN203138462 U CN 203138462U CN 2012204918748 U CN2012204918748 U CN 2012204918748U CN 201220491874 U CN201220491874 U CN 201220491874U CN 203138462 U CN203138462 U CN 203138462U
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Abstract
The utility model discloses an optical imaging device of an optical volume change signal, which comprises the following components: an optical transmission unit, a focusing lens unit, a spectroscope unit, an image sensing unit and an image analyzing unit. The optical transmission unit provides an optical signal. The focusing lens unit receives the optical signal and converts the optical signal to parallel light. The spectroscope unit receives the parallel light and reflects the parallel light to a part to be measured. The image sensing unit receives the optical signal which is reflected from the part to be measured for converting the optical signal to an image signal. The image analyzing unit is connected with the image sensing unit and analyzes the image signal for obtaining an optical volume change signal of the part to be measured. The optical imaging device can be selectively equipped in a light pollution preventing unit, thereby preventing interference of optical noise and obtaining a better measuring precision.
Description
Technical field
This utility model relates to a kind of optical imaging device of smooth change in volume signal, a kind of light change in volume signal that can accurately measure detected part particularly, and be not subjected to the optical imaging device of the interference of noise light.
Background technology
Modern medicine is under new science and technology is constantly progressive, technology and the quality of medical treatment are more and more higher, follow the physiology information of operation institute service recorder also more and more, physiological data except necessity, similarly be: heart beating, blood pressure, body temperature and blood oxygen concentration etc., the detection that also adds autonomic nerve slowly, for example: utilize the BIS of detecting electroencephalogram or the AEP that uses auditory nerve to detect, learn and anaesthetize the depth of anesthesia detecting that medicament uses number in the operation.By the detecting of above-mentioned these instruments, also allow the doctor in the process of operation, more can grasp the physiological data of sufferer.
Yet, in the process of present medical operating, the doctor is except can similarly being that electrocardiogram, blood pressure and blood oxygen concentration wait to judge the present physiological status of patient that undergos surgery by the physiological parameter of noting down many human bodies, (Photo plethysmography, PPG) signal also is a kind of non-intrusion measurement method that is commonly used to analyze the human body vessel properties on the modern medicine to record light change in volume.
Generally speaking, because the PPG signal is exactly the principle of utilizing Photosensing Units absorbing light heat input, note down that light changes and a kind of signal of inducing.Therefore, utilize to measure the principle of PPG signal, prior art is except the measurement volumes that can dwindle detected part, and the precision of measurement is also suitable good.It not only can be used to measure PPG signal and other heart blood relevant parameters of finger tip, also it can be noted down into numerical data with the convenient exploitation of analyzing interface.
Yet the PPG imaging device may have the interference of noise light, therefore can't guarantee in the PPG image whether the intensity variation on its tested point is the PPG signal of described tested point.Must readjust the relative position of PPG imaging device and detected part when in addition, measuring different detected part.
Therefore, how to provide a kind of and both can address the above problem, and can guarantee that the PPG imaging device can receive the Optical devices of the PPG signal of every bit on the detected part exactly, needs one of problem of solution badly for haveing the knack of this technical field person.
Summary of the invention
In view of more than, at present PPG pertinent instruments is on the market measured the signal of single point only, but not one whole signal.Review this utility model and can measure a whole to be measured signal, and described to be measured signal is namely formed by the signal arrangement of many points, therefore, this utility model can utilize the signal of face to understand to be measured diversity that goes up PPG signal between every bit.
Main purpose of the present utility model is at the optical imaging device that a kind of smooth change in volume signal is provided, and it makes it reflect the light change in volume signal of every bit on the detected part by the optical signal of incident being carried out the action of optically focused and light splitting.
Another purpose of the present utility model is at the optical imaging device that a kind of smooth change in volume signal is provided, it is to adopt the optical imagery framework of popularizing, reception not only can be measured large-area smooth change in volume signal from the optical signal of detected part, more can obtain the gross area PPG image of detected part.
A purpose more of the present utility model is at the optical imaging device that a kind of smooth change in volume signal is provided, and it is that above-mentioned optical imagery framework is placed under the harmful environment against sunshine, stops optical noise thus, to obtain detected part light change in volume signal accurately.
For reaching above-mentioned purpose, this utility model relates to a kind of optical imaging device of smooth change in volume signal, is suitable for measuring the light change in volume signal of a detected part.This kind optical imaging device comprises: an Optical Transmit Unit, a condenser lens unit, a spectroscope unit, an image sensing unit and an image analysing computer unit.Wherein, Optical Transmit Unit provides an optical signal.Condenser lens unit correspondence is arranged at Optical Transmit Unit, and receives the optical signal of Optical Transmit Unit, and is converted into a directional light.Spectroscope unit correspondence is arranged at the condenser lens unit, and receives the directional light of condenser lens unit output, and it is reflexed to detected part.The image sensing unit correspondence is arranged at the spectroscope unit, and is received from the optical signal that detected part reflects, to be converted into a signal of video signal of detected part.The image analysing computer unit is electrically connected at image sensing unit, and image analysing computer element analysis signal of video signal is to obtain the light change in volume signal of detected part.
In one embodiment, wherein the optical signal that reflects from detected part is to penetrate the spectroscope unit, arrives image sensing unit again.
In one embodiment, wherein the spectroscope unit is according to a predetermined ratio, directional light is reflexed to detected part, and optical signal is transmitted through image sensing unit.
In one embodiment, wherein above-mentioned Optical Transmit Unit includes: a light source module provides optical signal; And a control module, the intensity of light source of control driving light source module makes light source module launch the optical signal of varying strength according to different detected part.
In one embodiment, wherein the optical signal launched of above-mentioned light source module is the light of multi-wavelength or single wavelength, and light source module is light emitting diode, laser diode or electric filament lamp.
In one embodiment, wherein above-mentioned condenser lens unit is the concentration module that the optical signal that can assemble multiple angles becomes directional light, and concentration module is the light of assembling the multi-wavelength.
In one embodiment, but wherein above-mentioned condenser lens unit be that the optical signal that can assemble multiple angles becomes the lens of directional light or the face mirror that a reflected light signal becomes directional light.
In one embodiment, wherein image sensing unit is the numeric type photographic attachment with charge coupled cell or the such Image Sensor of CMOS.
In one embodiment, this kind optical imaging device more comprises a polariscope, and the optical signal that described detected part reflects is to be changed by image sensing unit by described polariscope earlier again.
In one embodiment, wherein the image analysing computer unit is the intensity variation oscillogram of analyzing and draw out each pixel in the image sensing unit, to obtain the light change in volume signal of detected part.
In one embodiment, this kind optical imaging device more comprises a harmful unit against sunshine, and described harmful unit against sunshine is around the periphery that is arranged at Optical Transmit Unit, condenser lens unit, spectroscope unit and image sensing unit, to prevent the interference of at least one optical noise.
In one embodiment, wherein said optical noise comprises ambient light and the non-optical signal of desiring to record.
In one embodiment, wherein the image analysing computer unit is according to light change in volume signal, obtains the distribution scenario of large tracts of land perfusion index.
The optical imaging device of the light change in volume signal that utility model discloses, optics framework for a kind of PPG imaging, this kind framework not only can accurately measure to be measured the PPG signal of going up every bit, more can photograph large-area PPG signal on the whole face picture of detected part and the detected part thus, and try to achieve large-area perfusion index (PI) according to large-area PPG signal and distribute.
Secondly, when this utility model more is disclosed in the above-mentioned optical imagery framework of enforcements under the harmful environment against sunshine, can further stop the ambient light interference of noise, obtain preferable certainty of measurement thus, assess with the measurement as follow-up clinical analysis.
Beneath by the appended graphic explanation in detail of specific embodiment cooperation, when the effect that is easier to understand the purpose of this utility model, technology contents, characteristics and reaches.
Description of drawings
Fig. 1 is the sketch map according to this utility model embodiment optical imaging device.
Fig. 2 is the flow chart of steps according to the measuring method of this utility model embodiment.
Fig. 3 is the schematic internal view according to the Optical Transmit Unit of this utility model embodiment.
Fig. 4 is the waveform sequential chart according to the light change in volume signal of this utility model embodiment.
Description of reference numerals:
The 1-detected part; The 101-Optical Transmit Unit; 102-condenser lens unit; 103-spectroscope unit; 104-harmful unit against sunshine; The 105-image sensing unit; 106-image analysing computer unit; The 301-light source module; The 302-control module.
The specific embodiment
This utility model provides a kind of optical imaging device of smooth change in volume signal, mainly be to utilize the optical imagery framework that the optical signal of incident is gathered into directional light earlier, carry out light splitting afterwards again, and then the optical signal that reflects from detected part by image sensing and analytic unit analysis, measure large-area smooth change in volume (Photo plethysmography, PPG) signal on the detected part thus exactly.
This kind optical imaging device more can be chosen under the harmful environment against sunshine and implement, and further to stop the interference of at least one optical noise, improves the precision of measurement result.
Please refer to Fig. 1, be the sketch map according to the optical imaging device of this utility model embodiment, it can be in order to measure light change in volume (PPG) signal of a detected part 1.This kind imaging device includes: 103, one harmful unit against sunshine, 102, one spectroscope unit, an Optical Transmit Unit (Light emitting unit) 101, one condenser lens unit (Condenser unit) (Beam splitter unit) (Light prevention unit), 104, one image sensing unit (Image sensing unit), 105 and one image analysing computer unit (Image analysis unit) 106.Wherein, Optical Transmit Unit 101 provides an optical signal; Condenser lens unit 102 correspondences are arranged at Optical Transmit Unit 101, and the optical signal that Optical Transmit Unit 101 is provided is converted to directional light; Spectroscope unit 103 correspondences are arranged at condenser lens unit 102, and directional light is reflexed to detected part 1; Image sensing unit 105 correspondences are arranged at spectroscope unit 103, and receive the optical signal that detected part 1 reflects, to be converted into signal of video signal; Image analysing computer unit 106 electrically connects image sensing unit 105, analyzes signal of video signal, to obtain the light change in volume signal of detected part 1.
See also Fig. 2, be the flow chart of steps according to the measuring method of this utility model embodiment.Below about the explanation of the embodiment of this embodiment, please in the lump with reference to Fig. 1 and shown in Figure 2, be described in detail as follows now.
Shown in step S202, at first, this utility model provides a harmful unit 104 against sunshine, around the periphery that is arranged at Optical Transmit Unit 101, condenser lens unit 102, spectroscope unit 103 and image sensing unit 105.In the present embodiment, this utility model is by harmful unit 104 against sunshine, stops optical noise to the interference of above-mentioned each optical element.Wherein, the optical noise that completely cut off of harmful unit 104 against sunshine includes ambient light (ambient light) and the non-optical signal of desiring to record of this utility model.In one embodiment, harmful unit 104 against sunshine can be but be not limited to a camera bellows (Camera Obscure).
Then, shown in step S204, provide an Optical Transmit Unit 101, with the emission optical signal.Wherein, please cooperate and consult shown in Figure 3ly, it is the schematic internal view according to the Optical Transmit Unit 101 of this utility model embodiment.
As shown in Figure 3, Optical Transmit Unit 101 includes: a light source module 301 and a control module 302.Generally speaking, light source module 301 can expose to detected part 1 so that optical signal to be provided in order to light source to be provided.302 of control modules electrically connect light source module 301, and in order to control the intensity of light source of driving light source module 301, so that light source module 301 according to different detected part tissues, can be launched the optical signal of varying strength.
For instance, light source module 301 for example can be: light-emitting components such as light emitting diode, laser diode or electric filament lamp, and to launch multi-wavelength or the light of single wavelength.
Afterwards, shown in step S206, condenser lens unit 102 is to receive the optical signal that Optical Transmit Unit 101 penetrates, and above-mentioned optical signal is converted to a directional light.In one embodiment, condenser lens unit 102 can be the concentration module that the optical signal that can assemble multiple angles becomes directional light, and multi-wavelength's light can be assembled in condenser lens unit 102.In another embodiment, condenser lens unit 102 can also be the optical signal that can assemble multiple angles become directional light lens (lens) but or a reflected light signal become the face mirror (mirror) of directional light.On the whole, condenser lens unit 102 is the optical signal of incident to be converted to directional light output.
Afterwards, shown in step S208, spectroscope unit 103 is the directional lights that receive 102 outputs of condenser lens unit, and above-mentioned directional light is reflexed to detected part 1.
Specifically, spectroscope unit 103 is an optical element that can make incident ray partial penetration and part reflection.Generally speaking, user can be by parameter such as design spectroscopical curvature etc., makes that spectroscope unit 103 can be according to a predetermined ratio, and the directional light of incident is partly reflexed to detected part 1, and part is transmitted through image sensing unit 105.
Afterwards, shown in step S210, the optical signal that reflects from detected part 1 can be received by image sensing unit 105, and by the photo-electric conversion element of image sensing unit 105 inside optical signal is converted to a signal of video signal.Wherein, image sensing unit 105 can be to have charge coupled cell (Charge Coupled Device, CCD) or CMOS (Complementary Metal-Oxide-Semiconductor CMOS) waits the numeric type photographic attachment of Image Sensor.In one embodiment, the optical signal that detected part 1 reflects also can pass through a polariscope earlier, arrives image sensing unit 105 again and changes.
It should be noted that, according to embodiment of the present utility model, before the optical signal that image sensing unit 105 reflects detected part 1 was converted to signal of video signal, the optical signal that detected part 1 reflects can penetrate spectroscope unit 103 earlier, arrives image sensing unit 105 again.Yet its practice is not limited so that present embodiment is described.If the kind relative position relation that adds between above-mentioned each optical element of design of designer, after making that directional light passes through the light splitting of spectroscope unit 103, can be by detected part 1 reflection directly into projection as sensing cell 105, then can also should be under the jurisdiction of utility model scope of the present utility model in order to implement this utility model equally.
At last, shown in step S210, image analysing computer unit 106 is to be connected in image sensing unit 105, analyzes the signal of video signal that image sensing unit 105 is exported thus, to capture the light change in volume signal of detected part 1.
Specifically, image analysing computer unit 106 can be computer, personal digital assistant or the handset device with image analysing computer function, it is in order to analyze and to draw out intensity variation oscillogram as shown in Figure 4, to obtain the light change in volume signal of detected part 1 thus.
Generally speaking, as shown in Figure 4, described oscillogram is the corresponding PPG signal of individual pixel in the image sensing unit 105 (pixel), therefore, this utility model can obtain large-area PPG signal face picture whole with it on the detected part 1 by the corresponding PPG signal of every bit on the record detected part 1.
In addition, according to embodiment of the present utility model, obtain the PPG signal of detected part 1 in image analysing computer unit 106 after, image analysing computer unit 106 more can be tried to achieve the distribution scenario of large tracts of land perfusion index (PI) on the detected part 1 further according to the PPG signal.
Because step S204 to S210 described in the utility model implements in harmful unit 104 against sunshine, therefore, the measuring method that this utility model discloses more can utilize harmful unit 104 against sunshine to stop the interference of optical noise further, obtains preferable measurement result thus.
In sum, the optical imaging device of the light change in volume signal that this utility model discloses, optics framework for a kind of PPG imaging, this kind framework not only can accurately measure to be measured the PPG signal of going up every bit, more can photograph large-area PPG signal on the whole face picture of detected part and the detected part thus, and try to achieve large-area perfusion index (PI) according to large-area PPG signal and distribute.
Secondly, when this utility model more is disclosed in the above-mentioned optical imagery framework of enforcements under the harmful environment against sunshine, can further stop the ambient light interference of noise, obtain preferable certainty of measurement thus, assess with the measurement as follow-up clinical analysis.
Above-described embodiment only is explanation technological thought of the present utility model and characteristics, its purpose makes the personage who has the knack of this skill can understand content of the present utility model and is implementing according to this, when can not with restriction claim of the present utility model, namely the equalization done of the spirit that discloses according to this utility model generally changes or modifies, and must be encompassed in the claim of the present utility model.
Claims (11)
1. the optical imaging device of a light change in volume signal is characterized in that, is suitable for measuring the light change in volume signal of a detected part, and described optical imaging device comprises:
One Optical Transmit Unit provides an optical signal;
One condenser lens unit, correspondence is arranged at described Optical Transmit Unit, and receives the described optical signal of described Optical Transmit Unit, and is converted into a directional light;
One spectroscope unit, correspondence are arranged at described condenser lens unit, and receive the described directional light of described condenser lens unit output, and it is reflexed to described detected part;
One image sensing unit, correspondence are arranged at described spectroscope unit, and are received from the optical signal that described detected part reflects, to be converted into a signal of video signal of described detected part; And
One image analysing computer unit is electrically connected at described image sensing unit, and the described signal of video signal of described image analysing computer element analysis is to obtain the light change in volume signal of described detected part.
2. the optical imaging device of smooth change in volume signal according to claim 1 is characterized in that, the optical signal that reflects from described detected part is to penetrate described spectroscope unit, arrives described image sensing unit again.
3. the optical imaging device of smooth change in volume signal according to claim 1, it is characterized in that, described spectroscope unit is according to a predetermined ratio, and described directional light is reflexed to described detected part, and described optical signal is transmitted through described image sensing unit.
4. the optical imaging device of smooth change in volume signal according to claim 1 is characterized in that, described Optical Transmit Unit includes:
One light source module provides described optical signal; And
One control module electrically connects the intensity of light source that described light source module and control drive described light source module, makes described light source module launch the optical signal of varying strength according to different detected part.
5. the optical imaging device of smooth change in volume signal according to claim 4, it is characterized in that, the described optical signal that described light source module is launched is the light of multi-wavelength or single wavelength, and described light source module is light emitting diode, laser diode or electric filament lamp.
6. the optical imaging device of smooth change in volume signal according to claim 1 is characterized in that, described condenser lens unit is the concentration module that the optical signal that can assemble multiple angles becomes directional light, and described concentration module is the light of assembling the multi-wavelength.
7. the optical imaging device of smooth change in volume signal according to claim 1 is characterized in that, becomes the lens of directional light or the face mirror that a reflected light signal becomes directional light but described condenser lens unit is the optical signal that can assemble multiple angles.
8. the optical imaging device of smooth change in volume signal according to claim 1 is characterized in that, described image sensing unit is the numeric type photographic attachment with charge coupled cell or the such Image Sensor of CMOS.
9. the optical imaging device of smooth change in volume signal according to claim 1 is characterized in that, more comprises a polariscope, and the optical signal that described detected part reflects is to be changed by described image sensing unit by described polariscope earlier again.
10. the optical imaging device of smooth change in volume signal according to claim 1, it is characterized in that, more comprise a harmful unit against sunshine, wherein said harmful unit against sunshine is around the periphery that is arranged at described Optical Transmit Unit, described condenser lens unit, described spectroscope unit and described image sensing unit, to prevent the interference of at least one optical noise.
11. the optical imaging device of smooth change in volume signal according to claim 10 is characterized in that, described optical noise comprises ambient light and the non-optical signal of desiring to record.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204918748U CN203138462U (en) | 2012-09-24 | 2012-09-24 | Optical imaging device of optical volume change signal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204918748U CN203138462U (en) | 2012-09-24 | 2012-09-24 | Optical imaging device of optical volume change signal |
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| CN203138462U true CN203138462U (en) | 2013-08-21 |
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| CN2012204918748U Expired - Lifetime CN203138462U (en) | 2012-09-24 | 2012-09-24 | Optical imaging device of optical volume change signal |
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