WO2019061819A1

WO2019061819A1 - Endoscope system and light source apparatus

Info

Publication number: WO2019061819A1
Application number: PCT/CN2017/114749
Authority: WO
Inventors: 郭祖强; 杨炳柯; 李屹
Original assignee: 深圳市绎立锐光科技开发有限公司
Priority date: 2017-09-27
Filing date: 2017-12-06
Publication date: 2019-04-04
Also published as: CN109549614A; CN109549614B

Abstract

An endoscope system (100), comprising an endoscope insertion portion (20), a light source apparatus (10), and a processor (30). The endoscope insertion portion (20) is configured for insertion into an organ or tissue of interest. The light source apparatus (10) comprises a light source (12) for emitting exciting light and a wavelength conversion device (13) for generating excited light under excitation of the exciting light. The exciting light and excited light are directed to the organ or tissue of interest through the endoscope insertion portion (20), and the proportion of exciting light to excited light may be adjusted depending on the organ or tissue of interest. The processor (30) comprises an imaging element (31), which is a light field camera. The light field camera photographs the observation site of the organ or tissue of interest illuminated by light emitted from the light source apparatus (10), and different optical signals are received according to a time sequence. The light source apparatus (10) can be adapted to light sources of varying primary color composition to suit different light absorptivities of the organ or tissue of interest, and can produce clear images of observation sites at different depths within the organ or tissue of interest.

Description

Endoscope system and light source device

Technical field

The invention relates to the field of medical optical technology, in particular to an endoscope system and a light source device.

Background technique

In the diagnosis inside the specimen, an endoscope system including an endoscope, a light source device, a processor, a display, and the like is generally used to observe the surface layer and the medium-deep tissue of the living tissue. When the endoscope system performs internal observation of the specimen, when observing the tissue at different depths, it is necessary to illuminate the tissue of the observation depth with light of a specific wavelength band, and the image of the observed portion can be accurately focused before the observed tissue can be clearly imaged. .

In the conventional light source device, the light source is usually a xenon lamp, a light emitting diode (LED), and a laser disc (LD) plus a laser powder to generate white light for illumination. Since the light absorption rate of the organ or tissue to be examined is different for different wavelengths, the spectral composition of the light reflected by the tissue is largely different from the illumination light. If white light is used for illumination, the image of the reflected light generated by the charge coupled device image sensor (CCD) is used to display the image tones, which is unfavorable for the user to observe and Judge. In response to the above problem, the endoscopic system adopts an image processing method to enlarge/reduce the intensity of the optical signal collected by the CCD, thereby obtaining an image suitable for observation. Although this processing method is relatively simple, its accuracy is low due to the influence of noise in the collected signal. When the optical signal intensity is amplified by image processing, the noise intensity is also amplified, and when the signal intensity is reduced, the light energy is lost in vain.

When observing tissues of different depths, it is necessary to not only enhance the illumination light for imaging, but also to clearly image the observed tissue by the imaging unit. The imaging elements of the endoscope system generally use a color or black-and-white CCD to record the light intensity and distribution of the imaging surface. But the depth of field of this camera element There is a contradiction in the aperture that is difficult to tune. To obtain a large depth of field, it is necessary to reduce the aperture. At this time, the signal-to-noise ratio is reduced, and noise is generated. The large aperture causes the depth of field to be small, and the imaging surface needs to be accurately focused while the background is blurred. When observing tissues and blood vessels of different depths, precise focusing is difficult, and it is easy to cause misjudgment or misjudgment.

Summary of the invention

In view of the above, it is necessary to provide an endoscope system that clearly images the observation sites of different depths of the organ or tissue to be examined.

The present invention also necessitates a light source device for improving the utilization of a light source, which is capable of matching light sources of different primary color light components according to different light absorption rates of an organ or tissue to be examined.

The invention provides an endoscope system comprising:

An endoscope insertion portion for insertion into an organ or tissue to be examined;

a light source device comprising a light source that emits excitation light, which is excited by the excitation light to generate a laser-converted wavelength conversion device, the excitation light and the laser-receiving light forming illumination light and being guided by the endoscope insertion portion An organ or tissue to be examined, wherein the proportion of light of different colors in the illumination light is adjustable according to the organ or tissue to be examined;

The processor includes a photographing component, wherein the photographing component is a light field camera, and the light field camera photographs an observation portion of an organ or tissue to be examined illuminated by illumination light from the light source device, and receives different optical signals in time series And converted to a video signal; and

a display unit configured to receive a video signal transmitted by the processor and display an image of the observed portion.

In an embodiment, the endoscope system further includes a filter device for filtering the laser light generated by the wavelength conversion device, wherein the proportion of light of different colors in the illumination light is adjusted The light intensity of the light source and/or adjustment of the wavelength conversion device and/or adjustment of the filter device are achieved.

In an embodiment, the light source device further includes a light source control portion that adjusts a current magnitude of the light source at different periods in the same pulse interval to adjust the light intensity of the light source.

In an embodiment, the wavelength conversion device comprises a plurality of regions carrying or not carrying a wavelength converting material or carrying different wavelength converting materials, the wavelength converting device further comprising an adjusting mechanism, the adjusting mechanism adjusting The area ratio of the regions is adjusted to adjust the proportion of light of different colors in the illumination light.

In an embodiment, the filter device includes a plurality of filter zones and an adjustment mechanism, the adjustment mechanism adjusting an area ratio of the filter zones to adjust a ratio of light of different colors in the illumination light.

In an embodiment, the light field camera comprises a black and white charge coupled device chip for recording optical signals of different depths of field of the organ or tissue to be examined.

In an embodiment, the processor includes a red image conversion unit, a green image conversion unit, and a blue image conversion unit, and the red image conversion unit is configured to process a red signal of each frame image, and corresponding The red signal is converted into a first surface layer, a first middle layer, and a first deep layer signal of the organ or tissue to be inspected, and the green image conversion unit is configured to process the green signal of each frame image, and the corresponding green signal Converting to a second skin layer, a second middle layer, and a second deep layer signal of the organ or tissue to be examined, the blue image converting portion is configured to process a blue signal of each frame image, and corresponding blue The signal is converted to a third surface layer, a third middle layer, and a third deep layer signal of the organ or tissue to be examined.

In an embodiment, the processor further includes an image combining unit, where the image combining unit is configured to combine the first surface layer signal, the second surface layer signal, and the third surface layer signal to obtain a Determining a surface image signal of the organ or tissue to be examined; combining the first intermediate layer signal, the second intermediate layer signal, and the third intermediate layer signal to obtain a middle layer image signal of the organ or tissue to be examined; Combining the first deep layer signal, the second deep layer signal and the third deep layer signal to obtain a deep image signal of the organ or tissue to be examined.

In an embodiment, the display portion includes a first display area for displaying a surface layer image of the organ or tissue to be examined, a second display area for displaying a middle layer image of the object or tissue to be examined, and And displaying a third display area of the deep image of the organ or tissue to be examined.

The present invention also provides a light source device including a light source that emits excitation light, and a wavelength conversion device that generates laser light by excitation of the excitation light, the excitation light and the excitation The light forms illumination light, and the proportion of light of different colors in the illumination light is adjustable.

Compared with the prior art, the endoscope system of the present invention provides a light source device capable of adjusting the proportion of illumination light and an observation portion of an organ or tissue to be examined that can illuminate the emitted light from the light source device. Shooting components. In addition, the endoscope system of the present invention employs a light field camera as a photographing element, which can not only provide a clear image of an observation portion of an organ or tissue to be examined, but also an image capable of displaying a true color, thereby facilitating the user's internal organization of the specimen. Observe and diagnose. The endoscope system of the present invention is capable of clearly imaging the different depths of tissue observed. The present invention also provides a light source device capable of matching light sources of different primary color light components according to different light absorption rates of an organ or tissue to be examined, so that the imaging portion of the endoscope system can clearly image the observed tissue. .

DRAWINGS

1 is a skeleton view of an endoscope system according to a first embodiment of the present invention.

2 is a schematic view showing the proportion of the angle of the light segments of each color in the filter device.

Fig. 3 is a graph showing the absorption coefficient of an organ or tissue to be examined for illumination light of different wavelengths.

4 is a schematic view showing the spectrum of absorbed light, illumination light, and reflected light of different wavelengths of the organ or tissue to be examined. Fig. 5 is a schematic view showing a photographing operation of a light field camera.

Fig. 6 is a skeleton diagram of an endoscope system according to a first embodiment of the present invention.

Fig. 7 is a schematic view of a display unit.

Main component symbol description

内窥镜系统 Endoscope system	100100
光源装置 Light source device	1010
光源控制部Light source control unit	1111
光源 light source	1212

波长转换装置 Wavelength conversion device	1313
滤光装置 Filter device	1414
滤光片Filter	140140
红光滤光片部Red light filter unit	141141
绿光滤光片部 Green filter unit	142142
蓝光滤光片部Blue light filter section	143143
内窥镜插入部 Endoscope insertion	2020
散光体Astigmatism	21twenty one
透镜组Lens group	22twenty two
处理器 processor	3030
拍摄元件 Shooting component	3131
拍摄控制器 Shooting controller	3232
图像处理器 Image processor	3333
蓝光图像转换部Blu-ray image conversion unit	331331
绿光图像转换部Green light image conversion unit	332332
红光图像转换部Red light image conversion unit	333333
图像组合部 Image combination department	334334
第二控制部 Second control unit	3434

存储部 Storage department	3535
第一控制部 First control department	4040
显示部 Display department	5050
第一显示区 First display area	5151
第二显示区 Second display area	5252
第三显示区 Third display area	5353

The invention will be further illustrated by the following detailed description in conjunction with the accompanying drawings.

Specific embodiment

For the sake of clarity and clarity, where appropriate, the same reference numerals are used to identify corresponding or similar elements in different drawings. In addition, many specific details are mentioned in the specification in order to provide a thorough understanding of the embodiments described herein. However, it will be understood by those skilled in the art that the embodiments described herein may also be practiced without these specific details. In other instances, some methods, procedures, and components have not been described in detail in order not to obscure the technical features being described. The schema does not necessarily need to be the same as the size of the object. In order to better illustrate the details and technical features, the proportion of display in a particular part of the drawing may be magnified. The description in the specification is not to be construed as limiting the scope of the embodiments described herein.

Referring to Figure 1, a schematic diagram of an endoscope system 100 in accordance with a first embodiment of the present invention. The endoscope system 100 includes a light source device 10, an endoscope insertion portion 20, a processor 30, a first control portion 40, and a display portion 50. The light source device 10 is configured to generate illumination light and transmit it to the endoscope insertion portion 20 to illuminate an organ or tissue to be examined, and the photographing device 30 is configured to photograph and process the organ or tissue to be examined. The captured image is used to set or adjust different modes of the light source device 10 to perform different organs or tissues. For illumination, the display unit 50 is configured to display image information transmitted by the processor 30.

In an embodiment, the light source device 10 is disposed at a front end of the endoscope insertion portion 20, and the processor 30 is disposed at a rear end of the endoscope insertion portion 20. It can be understood that in other embodiments, the light source device 10 and the processor 30 may be disposed on the same side of the endoscope insertion portion 20. The first control unit 40 and the display unit 50 are electrically connected to the processor 30.

The light source device 10 is for supplying illumination light that illuminates an observation portion of the organ or tissue to be examined. The light source device 10 includes a light source control unit 11, a light source 12, a wavelength conversion device 13, and a filter device 14. The light source control unit 11 can drive and control the light source 12. The light source 12 is capable of emitting excitation light, and the wavelength conversion device 13 emits a laser beam by excitation of the excitation light, and the excitation light and the laser light source together constitute illumination light for illuminating the organ or tissue to be examined. .

Specifically, a plurality of regions may be disposed on the wavelength conversion device 13, and the plurality of regions respectively carry or do not carry a wavelength conversion material or carry different wavelength conversion materials, so that the excitation light emitted by the light source 12 is irradiated The wavelength conversion device 13 is capable of generating a laser beam of a specific spectrum. The wavelength converting material is, for example, but not limited to, a phosphor, a quantum dot or a dye. The laser light may be a blue, green or yellow laser or the like depending on the material properties of the wavelength converting material.

The organ or tissue to be examined is, for example, but not limited to, an ear, a nose, a throat, a rectum, a bladder tissue, a joint, a mucosa tissue, a blood vessel, a venous blood vessel, and an arterial blood vessel.

It is to be understood that the light source control unit 11 can control the start, end, drive time, synchronization timing, and the like of the respective portions of the light source device 10.

The light source 12 is a laser light source, specifically a blue laser diode. The light source 12 is capable of emitting blue excitation light. In the present embodiment, the excitation light is a blue laser having a center wavelength of 445 nanometers (nm). The blue laser light emitted by the light source 12 can be conducted to the wavelength conversion device 13 through an optical fiber. In this embodiment, the wavelength conversion device 13 has a yellow phosphor thereon, so the blue laser light emitted by the light source 12 excites the After the wavelength conversion device 13 generates a yellow laser light, the blue excitation light and the yellow laser light are mixed to generate white light for illumination, and the illumination light is guided to the object through the endoscope insertion portion 20. The organ or tissue is examined to facilitate observation by the observer of the organ or tissue to be examined.

Referring to FIG. 1 and FIG. 2 together, the filter device 14 is disposed behind the wavelength conversion device 13 for filtering the illumination light to make the illumination light color more pure. The filter device 14 includes a filter 140. The filter 140 has a circular plate shape and is divided into a plurality of portions in the circumferential direction, and each portion of the filter 140 is capable of transmitting light of a specific wavelength range.

In the present embodiment, the filter 140 includes a plurality of filter regions for passing light of a specific wavelength range. It can be understood that the filter region can be a red filter region, a blue filter region, a green filter region, a yellow filter region, etc., which can be set as needed. Therefore, since the filter device 14 is continuously rotated, when the white light passes through the filter 140 of the filter device 14, time-series light of a specific color can be generated at a time.

Figure 3 shows the absorption coefficient curve of the organ or tissue to be examined for illumination light of different wavelengths. As shown in FIG. 3, the organ or tissue to be examined has different absorption rates for light of respective colors (or wavelengths).

Further, it can be seen from FIG. 4 that the absorption coefficient of the blue light is higher in the organ or tissue to be examined, and the light intensity of the blue light reflected by the organ or tissue to be examined is lower than that of the blue light. It can be seen that the blue light is lost during the irradiation and reflection; the absorption coefficient of the red light is low in the organ or tissue to be examined, and the light intensity of the red light reflected through the organ or tissue to be examined is relatively illuminating the red light. The light intensity is high, and the red light is less likely to be lost during illumination and reflection. Therefore, in order to cause the illumination light to illuminate the organ or tissue to be examined, a real image can be displayed. The light absorption coefficient of the organ or tissue to be examined adjusts the proportion of light of different colors in the illumination light.

It can be understood that for normal tissues or diseased tissues to be examined, the absorption rate of light of different wavelengths is also different from that of normal tissues. In order to allow users to clearly distinguish between different groups The woven, diseased tissue and normal tissue can illuminate the organ or tissue to be examined with illumination light of different spectral components according to the difference in their absorption coefficients.

It can be understood that the absorption coefficients of different wavelengths of illumination light are different for different organs or tissues, so when determining the primary color light component of the emitted light, firstly, different organs or tissues are tested for absorption (or reflection) of different wavelengths. The spectral curve, and then the proportion of light of different colors in the emitted light is adjusted according to the absorption (or reflection) of the organ or tissue.

In this embodiment, it is possible to adjust the proportion of light of different colors in the illumination light by adjusting the light intensity of the excitation light and/or adjusting the wavelength conversion device and/or adjusting the filter device. purpose. The above embodiments will be further explained below.

In the present embodiment, the light source device 10 can adjust the intensity of the different colors of the illumination light by adjusting the intensity of the excitation light of the light source 12 for different periods in the same pulse period by the light source control unit 11.

Specifically, the excitation light emitted by the light source 12 at different periods in the same pulse period illuminates different regions of the wavelength conversion device 13. For example, the wavelength converting material has a blue phosphor region and a green phosphor region, and the light source 12 has an excitation light period corresponding to the yellow phosphor region and an excitation light period corresponding to the green region in the same pulse period. Therefore, when it is required to increase the proportion of blue light in the illumination light, the intensity of the excitation light in the excitation light period corresponding to the blue phosphor region may be increased, and the excitation light in the excitation light period corresponding to the green phosphor region may be increased. The intensity is constant, so that the blue light generated by the excitation light after being irradiated to the blue phosphor region of the wavelength conversion device 13 is increased by the laser, and the green laser is kept unchanged, thereby increasing the proportion of blue light in the laser, thereby achieving The purpose of increasing the proportion of blue light in the illumination light is improved.

It can be understood that the blue light ratio of the illumination light can also be improved by keeping the excitation light intensity in the excitation light period of the blue light region corresponding to the light source 12 while reducing the intensity of the excitation light in the excitation light period corresponding to the green region of the light source 12; Or increasing the intensity of the excitation light in the excitation light period of the blue light region corresponding to the light source 12 while reducing the green area corresponding to the light source 12 The manner in which the intensity of the excitation light is excited during the excitation period increases the proportion of blue light of the illumination light.

In the present embodiment, adjusting the light intensity in the different periods of the laser light is achieved by adjusting the magnitude of the current of the light source 12. When the current of the light source 12 increases, the intensity of the laser light emitted by the light source 12 increases; when the current of the light source 12 decreases, the intensity of the laser light emitted by the light source 12 decreases.

Further, in the present embodiment, it is possible to adjust the ratio of the different colors of light in the illumination light by adjusting the area ratio of the different regions on the wavelength conversion device 13.

Specifically, the area of the plurality of regions of the wavelength conversion device 13 can be adjusted as needed. When the area of the specific region of the wavelength conversion device 13 is increased or decreased by the light source 12, the intensity of the excited light after passing through the specific region of the wavelength conversion device 13 is correspondingly increased or decreased, thereby adjusting the The proportion of light of a particular color in the illumination.

For example, the wavelength conversion device 13 includes a blue phosphor region and a green phosphor region. When it is required to increase the proportion of blue light in the illumination light, the area of the blue phosphor region can be increased while being reduced. The area of the green phosphor is small such that the blue light after passing through the blue phosphor region is increased by the laser light, and the green phosphor after passing through the green phosphor region is reduced, thereby increasing the proportion of blue light in the laser. In turn, the purpose of increasing the proportion of blue light in the illumination light is achieved.

It can be understood that when the proportion of different phosphor areas on the wavelength conversion device 13 changes, it is necessary to adjust the pulse period of the light source 12 to match the wavelength conversion device 13. Further, in the present embodiment, the wavelength conversion device 13 is provided with an adjustment mechanism capable of adjusting the area ratio of different regions on the wavelength conversion device 13. Specifically, the adjusting mechanism can achieve the purpose of adjusting the area ratio of different regions by shielding a partial region.

Further, in the present embodiment, the wavelength conversion device 13 includes a blue phosphor layer. It can be understood that since the spectral component of the blue laser is narrow, a wide-band blue laser can be formed when the narrow-band blue excitation light excites the blue phosphor layer, thereby facilitating the user to distinguish different organs of the sample. Or an image of the organization.

Further, in the present embodiment, the light color ratio of the different colors in the illumination light can be adjusted by adjusting the area ratio of the different filter regions on the filter device 14.

Specifically, the different filter regions on the filter device 14 can be adjusted as needed, so that the intensity of the light after being filtered by the filter device 14 after the wavelength conversion device 13 is changed, thereby adjusting The different colors are affected by the proportion of the laser light, and the purpose of adjusting the proportion of light of different colors in the illumination light is achieved.

For example, the filter device includes a blue filter region and a green filter region. When it is required to increase the proportion of blue light in the illumination light, the area of the blue filter region can be increased while being reduced. The area of the green filter region is small, so that the blue light filtered through the blue filter region is increased, and the green light filtered through the green filter region is reduced, thereby achieving the purpose of increasing the proportion of blue light in the illumination light. .

Further, in the embodiment, the filter device 14 is provided with an adjustment mechanism capable of adjusting the area ratio of different filter regions on the filter device 14. Specifically, the adjusting mechanism can achieve the purpose of adjusting the area ratio of different filter areas by shielding a part of the filter area.

It can be understood that when it is required to adjust the proportion of light of different colors in the illumination light, it can be used alone by the above three methods or by a combination of the above three methods.

The endoscope insertion portion 20 includes a light diffusing body 21 and a lens group 22. The light diffusing body 21 and the lens group 22 are disposed on a propagation path of light emitted from the light source device 10. The light diffusing body 21 is configured to illuminate the to-be-detected organ or tissue after the laser light of the plurality of colors generated by the filter device 14 is time-divisioned. The lens group 22 is configured to adjust a light distribution angle of the reflected light to focus the light reflected through the to-be-detected organ or tissue, thereby enabling the reflected light to be more concentratedly transmitted to the processor 30, and correspondingly Imaging on the shooting surface.

The processor 30 includes an imaging element 31, an imaging control unit 32, an image processing unit 33, a second control unit 34, and a storage unit 35. The imaging element 31, the imaging control unit 32, the image processing unit 33, the second control unit 34, and the storage unit 35 are electrically connected together.

In the present embodiment, the imaging element 31 is preferably a light field camera that captures an observation portion of an organ or tissue to be examined illuminated by illumination light from the light source device 10, and receives different timings. The optical signal is converted into a video signal. In other embodiments, the imaging element may also be other imaging devices, such as a color CCD. The light field camera includes a black and white CCD chip capable of recording optical signals of different depths of field (hierarchy, depth), and is also capable of converting optical signals of respective colors generated by the filtering device into electrical signals. The imaging element 31 has a imaging surface (not shown) such that light reflected via the organ or tissue to be examined can be imaged on the imaging surface of the imaging element 31.

The imaging control unit 32 is connected to the second control unit 34 in the processor 30, and inputs a drive signal to the imaging element 31 in synchronization with the basic clock signal input from the second control unit 34. The imaging element 31 outputs an imaging signal to the image processor 33 at a predetermined frame rate based on a drive signal from the imaging control unit 32. The image processor 33 performs image signal processing on the photographing signal output from the photographing element 31, that is, converts the image data into a video signal such as a composite signal or a component signal to generate image data. The storage unit 35 is configured to store, but is not limited to, the image data generated by the image processor 33 and the proportion data of the light source device 10 that can adjust the respective primary colors of light, and thus can be selected by the user during use.

It is to be understood that the imaging control unit 32 can control the start, end, drive time, synchronization timing, and the like of the respective portions of the imaging element 31.

FIG. 5 shows an imaging mode in which the imaging control unit 32 controls the imaging element 31. As shown in FIG. 5, the imaging device 31 performs an accumulation operation of accumulating signal charges and a reading operation of reading accumulated signal charges during one frame period under the control of the imaging control unit 32. For each frame, image light of three colors of blue light, green light, and red light is sequentially captured, and signal charges are accumulated, and the captured signals are sequentially outputted as blue light, green light, and red light according to the accumulated signal charge. The above operation is repeated during the period in which the organ or tissue observation mode is to be examined.

It is to be understood that the image processing unit 33 is provided with a plurality of processing units in order to increase the pixels of the imaging element 31, reduce the memory of the image data, and increase the processing speed of the image data. As shown in FIG. 6, the image processing unit 33 includes a Blu-ray image conversion unit 331, a green light image conversion unit 332, and a red light map. Image conversion unit 333. The blue light image conversion unit 331 is configured to process a blue light signal of each frame image, and convert the corresponding blue light signal into a surface layer, a middle layer, and a deep layer signal of the to-be-detected organ or tissue. The green light image conversion unit 332 is configured to process the green light signal of each frame image, and convert the corresponding green light signal into a surface layer, a middle layer, and a deep layer signal of the to-be-detected organ or tissue. The red light image conversion unit 333 is configured to process a red light signal of each frame image, and convert the corresponding red light signal into a surface layer, a middle layer, and a deep layer signal of the to-be-detected organ or tissue.

Further, the image processor 33 further includes an image combining unit 334, configured to combine the first surface layer signal, the second surface layer signal, and the third surface layer signal to obtain A surface image signal of the organ or tissue to be examined. The image combining unit 334 is further configured to combine the first middle layer signal, the second middle layer signal, and the third middle layer signal to obtain a middle layer image signal of the organ or tissue to be examined. The image combining unit 334 is further configured to combine the first deep layer signal, the second deep layer signal, and the third deep layer signal to obtain a deep image signal of the organ or tissue to be examined.

It can be understood that the surface, middle and deep images of the organ or tissue to be examined are composed of three signals of blue light, green light and red light, so the blue light obtained by the image processor 33 on the imaging element 31 is The green light and the red light signal are distinguished at different depths to separate blue, green, and red light signals of respective depths, and then combine blue, green, and red light signals to obtain a surface layer of the organ or tissue to be examined. , middle and deep image signals.

It can be understood that the blue, green, and red light signals obtained by the imaging element 31 can distinguish between blue, green, and red light of different depths by a software algorithm.

The first control unit 40 is configured to store parameter information of different organs or tissues, and is convenient for the user to input parameters or adjust the working mode of the light source device 10. Specifically, the first control unit 40 stores therein light absorption parameters of different tissues or organs, which can input signals to the light source device 10 according to different organs that are photographed to control different components in the light output of the light source device. For example, when taking an image of the stomach and taking an image of the intestine, the user can input different signals according to the control 40 to adjust different modes of operation of the light source device 10.

The processor 30 can control the display unit 50 to generate the image processor 33 The image data is converted into a composite signal or a component signal to display a clear image. As shown in FIG. 7, the display portion 50 includes a first display area 51, a second display area 52, and a third display area 53. The first display area 51 is configured to display a surface layer image of the organ or tissue to be inspected, the second display area 52 is used to display a middle layer image of the organ or tissue to be inspected, and the third display area 53 A deep image for displaying the organ or tissue to be examined.

It can be understood that the endoscope system 100 further includes an endoscope operating portion (not shown), a power cable (not shown), and an optical fiber (not shown). The endoscope operating portion is disposed at the Between the light source device 10 and the processor 30, the power supply cable is used to establish a communication connection between the light source device 10 and the endoscope insertion portion 20 and the processor 30, and the optical fiber is used for conducting The light emitted by the light source device 10 is sent to the organ or tissue to be examined, and the light reflected by the organ or tissue to be examined is transmitted to the processor 30.

The endoscope system of the present invention is provided with a light source device having an adjustable ratio of respective primary colors of blue light, green light, and red light, that is, the light source device can be different according to different ratios of light absorption rates of the organ or tissue to be examined. A light source of a primary color component such that the imaging element of the endoscope system is capable of directly acquiring an optical signal. In addition, the endoscope system of the present invention uses a light field camera as an imaging element, which not only can clearly image the observed part of the organ or tissue to be examined, but also can display the true color of the image, thereby facilitating the user to perform internal organization of the sample. Observation and diagnosis.

The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited by the above embodiments, and the above embodiments are merely for explaining the claims. However, the scope of protection of the present invention is not limited to the description. Any changes or substitutions that are easily conceivable within the scope of the present invention are intended to be included within the scope of the present invention.

Claims

An endoscope system comprising:

An endoscope insertion portion for insertion into an organ or tissue to be examined;

a light source device including a light source that emits excitation light and a wavelength conversion device that generates laser light by excitation of the excitation light, the excitation light and the laser light receiving illumination light and being guided by the endoscope insertion portion An organ or tissue to be examined, wherein the proportion of light of different colors in the illumination light is adjustable according to the organ or tissue to be examined;

The processor includes a photographing component, wherein the photographing component is a light field camera, and the light field camera photographs an observation portion of an organ or tissue to be examined illuminated by illumination light from the light source device, and receives different optical signals in time series And converted to a video signal; and

a display unit configured to receive a video signal transmitted by the processor and display an image of the observed portion.
The endoscope system according to claim 1, wherein the endoscope system further comprises a filter device for filtering a laser generated by the wavelength conversion device, The proportion of different colors of light in the illumination light is achieved by adjusting the light intensity of the light source and/or adjusting the wavelength conversion device and/or adjusting the filter device.
The endoscope system according to claim 1, wherein said light source device further comprises a light source control portion that adjusts a current amount of said light source at different periods in the same pulse interval to adjust said light source brightness.
The endoscope system according to claim 1, wherein said wavelength conversion device comprises a plurality of regions carrying or not carrying a wavelength converting material or carrying a different wavelength converting material, said wavelength converting device further An adjustment mechanism is included that adjusts an area ratio of the plurality of regions to adjust a different color ratio of light in the illumination light.
The endoscope system according to claim 2, wherein said filter means comprises a plurality of filter zones and an adjustment mechanism, said adjustment mechanism adjusting an area ratio of said filter zones to adjust said illumination The proportion of light in different colors in the light.
The endoscope system of claim 1 wherein said light field camera comprises black and white A charge coupled device chip for recording optical signals of different depths of field of the organ or tissue to be examined.
The endoscope system according to claim 1, wherein said processor comprises a red image converting portion, a green image converting portion, and a blue image converting portion, said red image converting portion for each frame image The red signal is processed, and the corresponding red signal is converted into a first surface layer, a first middle layer, and a first deep layer signal of the organ or tissue to be examined, and the green image conversion portion is used for green of each frame image The signal is processed, and the corresponding green signal is converted into a second surface layer, a second middle layer, and a second deep layer signal of the organ or tissue to be examined, and the blue image conversion portion is used for blue of each frame image The signal is processed and the corresponding blue signal is converted to a third, third, and third deep layer signal of the organ or tissue to be examined.
The endoscope system according to claim 7, wherein said processor further comprises an image combining section for said first surface layer signal, said second surface layer signal, and said The third surface layer signals are combined to obtain a surface layer image signal of the organ or tissue to be inspected; the first middle layer signal, the second middle layer signal, and the third middle layer signal are combined to obtain the to-be-processed Detecting an intermediate image signal of an organ or tissue; and combining the first deep layer signal, the second deep layer signal, and the third deep layer signal to obtain a deep image signal of the organ or tissue to be examined.
The endoscope system according to claim 8, wherein the display portion includes a first display area for displaying a superficial image of the organ or tissue to be examined, and for displaying the organ or tissue to be examined a second display area of the middle layer image and a third display area for displaying a deep image of the organ or tissue to be examined.
A light source device, characterized in that the light source device includes a light source that emits excitation light, and a wavelength conversion device that generates laser light by excitation of the excitation light, and the excitation light and the laser light to form illumination light are emitted, The proportion of light of different colors in the illumination light can be adjusted.