CN108603642A - A kind of endoscopic system and its light supply apparatus - Google Patents
A kind of endoscopic system and its light supply apparatus Download PDFInfo
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- CN108603642A CN108603642A CN201680081277.9A CN201680081277A CN108603642A CN 108603642 A CN108603642 A CN 108603642A CN 201680081277 A CN201680081277 A CN 201680081277A CN 108603642 A CN108603642 A CN 108603642A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S10/00—Lighting devices or systems producing a varying lighting effect
- F21S10/02—Lighting devices or systems producing a varying lighting effect changing colors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
- F21V9/08—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters for producing coloured light, e.g. monochromatic; for reducing intensity of light
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
Abstract
A kind of light supply apparatus, light supply apparatus (1) include the fluorescence colour wheel (12) for generating the light source portion of exciting light and being movably arranged relative to light source portion.Different zones on fluorescence colour wheel (12) may be provided with different fluorescent materials, and when in rotation to the light path of exciting light, different zones send out the light of different wavelength range.Light supply apparatus (1) can make full use of the energy of exciting light, avoid the light for being provided out useless wave-length coverage.
Description
A kind of endoscopic system and its light supply apparatus technical field
[0001] the present invention relates to light supply apparatus, the more particularly, to light supply apparatus of endoscopic system and the endoscopic system using the light supply apparatus.
[0002]
[0003] background technique
[0004] effect of medical endoscope is observed organism inside, it is therefore desirable to the light supply apparatus illuminated to organism inside.The composition of endoscope are as follows: the insertion section of progress structure observation, the image processor that output image is handled inside the light supply apparatus of illumination light is provided, is inserted into organism for endoscope.In the front end of insertion section, equipped with the illuminating window illuminated to tissue and the observation window observed tissue.Fiber optic bundle is also equipped in insertion section, fiber optic bundle to insertion section front end, illuminates the optical transport of light source to tissue.
[0005] for neoplastic lesion, past Conventional white diagnosis is analyzed by the contrast difference of pathological tissues and normal tissue, and in recent years, special light, which is imaged in diagnosing tumor, to be applied.In narrow bandwidth imaging (Narro w Band Imaging, NBl), using the contrast of capillary can be improved by the narrow-band blue light or narrowband illuminated with green tissue that blood absorbs strongly.It is different from normal tissue in the state that abnormal structure's medium vessels of canceration etc. occur for living tissue, therefore blood vessel is emphasized to observe and thinks there is applicability in the diagnosis of early-stage cancer discovery.
[0006] influence in view of light source illuminating effect to image quality, the art teaches a plurality of types of light supply apparatus.For example, narrow-band blue light, narrowband green light that xenon source cooperation multiple groups convolutional filter generates R, G, B three coloured light for normal light observation and observes for special light can be used.Under normal light observing pattern, by controlling convolutional filter, red, green, blue three coloured light is successively filtered out from the xenon lamp for issuing white light.But the light source is configured because using xenon lamp, service life is short, and xenon lamp included blue component, green components, red color components ratio fix, assorted component ratio cannot be made to change, and the luminous flux of xenon lamp also can not real inch adjust, even if optical filter is cooperated to use, the case where emergent light is without desired flux ratio is still had, the picture quality of final output image is influenced.In addition the blue light of the lower narrow bandwidth for illumination of light source configuration and green light are to be obtained by two stage filter piece from xenon lamp optical filtering, therefore the green light light intensity of the blue light of narrowband and narrowband is weaker.
[0007]
[0008] summary of the invention
[0009] the purpose of the present invention is to provide a kind of light supply apparatus, are especially adapted for use in the light supply apparatus of medical endoscope system.
[0010] light supply apparatus of the invention includes:
[0011] light source control portion；
[0012] first semiconductor light source generates exciting light；
[0013] first colour wheel comprising multiple color areas；Multiple color Qu Kefen inch of first colour wheel are located in the optical path of the exciting light；The multiple color area includes one or more wavelength-converting regions coated with fluorescent material, the fluorescent material of the wavelength-converting region generates the first monochromatic light under the irradiation of the exciting light, and the first monochromatic wave-length coverage is different from the wave-length coverage of the exciting light；And
[0014] optical system, for by the light-emitting window of light supply apparatus described in the described first monochromatic light directing.
[0015] light supply apparatus of the invention uses semiconductor light source, not only extends service life, but also the light ray energy that entire light supply apparatus is exported from its light-emitting window is adjustable, can adapt to different observation demands for greater flexibility.
[0016] multiple color areas of the light supply apparatus further include transmission area, and the transmission area provides the second monochromatic light under the irradiation of the exciting light, and the second monochromatic wave-length coverage is identical as the wave-length coverage of the exciting light.The light supply apparatus further includes the second colour wheel comprising multiple color areas；Multiple color Qu Kefen inch of second colour wheel are located in the optical path of the exciting light, and inch is divided to generate multiple third monochromatic light under the irradiation of the exciting light." the first monochromatic light " above indicates that the light of wavelength convert occurs relative to exciting light provided by the first colour wheel；" the second monochromatic light " indicates that the light of wavelength convert does not occur relative to exciting light provided by the first colour wheel；" third monochromatic light " indicates provided by the second colour wheel, the light of wavelength convert, but the monochromatic one or more of third occurs relative to exciting light, relative to the first monochromatic light that the first colour wheel provides, have different wave-length coverages.
[0017] light supply apparatus further includes the second semiconductor light source, generates the narrow-band light that can enhance angiography effect, and the optical system is also used to the light-emitting window of light supply apparatus described in the narrow-band light directing；Wherein the light source control portion controls first semiconductor light source and the second semiconductor light source divides inch to work.Narrow-band light is directly generated by another semiconductor light source, and the illumination intensity of the corresponding special smooth observing pattern of narrow-band light can be improved, and improves illuminating effect.
[0018] optical system of the light supply apparatus includes dichroscope, and the optical path of the optical path and the first monochromatic light (equally with the second monochromatic light) that make narrow-band light synthesizes same optical path through dichroscope.The light path design is simple, not will lead to light transmission inch and causes excessive energy dissipation, same optical path is also more conducive to be applied to medical endoscope inch, is imported into the mirror body of endoscope by coupling mirror focusing, be further reduced energy loss.
[0019] the present invention also provides a kind of endoscopic system, which includes above-mentioned light supply apparatus；
[0020] insertion section, front end are furnished with gray-scale sensor, and gray-scale sensor carries out Image Acquisition under the first monochromatic light, obtain picture signal；
[0021] control system, it includes imaging control unit and image processing part: the imaging control unit is according between the described first monochromatic light inch out, picture signal between controlling the exposure inch that the gray-scale sensor carries out Image Acquisition under the first monochromatic light, and based on the gray-scale sensor generates image；The image that described image processing unit generates the imaging control unit carries out image procossing, image after output processing；And
[0022] display, for showing image after the processing.
[0023]
[0024] Detailed description of the invention
[0025] in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, the drawings to be used in the description of the embodiments or prior art will be briefly described below, apparently, drawings in the following description are only some embodiments of the invention, for those of ordinary skill in the art, without creative efforts, it is also possible to obtain other drawings based on these drawings.
[0026] Fig. 1 is a kind of structural schematic diagram of light supply apparatus in the embodiment of the present invention；
[0027] Fig. 2 is the front view of colour wheel in Fig. 1, wherein there are three color areas for the colour wheel tool illustrated；
[0028] Fig. 3 is a kind of structural schematic diagram of light supply apparatus in the embodiment of the present invention；
[0029] Fig. 4 is a kind of structural schematic diagram of endoscopic system in the embodiment of the present invention；
[0030] Fig. 5 is the spectral response curve figure of ccd sensor or cmos sensor；
[0031] Fig. 6 a is the schematic diagram of light supply apparatus compensating for gray-scale sensor spectrum non_uniform response of the invention；And [0032] Fig. 6 b is another schematic diagram of light supply apparatus compensating for gray-scale sensor spectrum non_uniform response of the invention.
[0033]
[0034] specific embodiment
[0035] in order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that the described embodiment is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, should fall within the scope of the present invention.
[0036] light supply apparatus of the invention generates monochromatic mode using excitation light stimulus fluorescent material, provides and divides inch monochromatic illumination under normal light light illumination mode.The excitation luminescence process can not only make full use of the energy of exciting light, improve the capacity usage ratio of light supply apparatus, and pass through the flexible choice of fluorescent material and exciting light, the ordinary monochromatic light of meet demand can be generated, and the light of useless wave-length coverage will not be introduced.Light supply apparatus of the invention provides the special optical illumination under special optical illumination mode in such a way that semiconductor light source directly provides narrow-band light.It is equally efficient utilization to energy that this, which directly shines, and can guarantee the intensity of illumination under special optical illumination, is conducive to improve subsequent picture quality.
[0037] Fig. 1 shows a kind of light supply apparatus 1 of one embodiment of the invention, which includes the first semiconductor light source 11, the first colour wheel 12, optical system, light-emitting window 14 and light source control portion 15.The light that first semiconductor light source 11 generates, is transmitted to light-emitting window 14 through the first colour wheel 12 and optical system, for illuminating.It light source control portion 15 can be with the main-machine communication of endoscopic system described later, the component for controlling light supply apparatus 1 shines in the case where meeting imaging demand, such as light source control portion 15 can control the Jian of the first semiconductor light source 11 open, close, luminous flux is adjusted etc., light source control portion 15 can control the movement velocity etc. of the first colour wheel 12 movement.
For generating exciting light, which is irradiated on the first colour wheel 12 [0038] first semiconductor light source 11 along its optic path.First semiconductor light source 11 can be selected from laser, LED light source and laser diode；Above-mentioned light source type has high-intensitive, fast frequency, and is cold light source, can preferably be suitable for medical endoscope field.Wherein laser and laser diode have high light flux and low etendue, for the application scenarios in light-emitting window 14 using optical fiber light-guiding, can be further improved fiber coupling rate.The wave-length coverage of exciting light can be according to flexible choices such as fluorescent material to be motivated, current light scene demands, such as Wavelength-selective range is the blue laser of 400nm-480nm.
[0039] in the embodiment, first colour wheel 12 includes multiple color areas, first colour wheel 12 is relative to the first rotatably setting of semiconductor light source 11, in the rotation process of the first colour wheel 12, multiple color areas are divided inch to rotate to the optical path of exciting light, the exciting light that such first semiconductor light source 11 generates can be respectively radiated to not homochromy area between different inch, and each color, which is distinguished, you can well imagine the multiple monochromatic light different for wave-length coverage.For example, different more of wave-length coverage
A monochromatic light can be perceived as the light of different colours.For example, multiple monochromatic light that wave-length coverage is different, can be feux rouges, green light, blue light, yellow light etc..For example, multiple monochromatic light that the wave-length coverage of multiple color areas generations is different, mainly can be broadband light, which can refer to the wavelength bandwidth of tens nanometers, and however, it is not limited to this.
[0040] in some embodiments, multiple color areas are the wavelength-converting region for being provided with fluorescent material.Fluorescent material can be coated in the surface Se Qu of colour wheel, also embeddable inside the color area of colour wheel.Wavelength-converting region refers to that incident side (right side in Fig. 1) received range of light wavelengths are different from the range of light wavelengths that light emission side (left side in Fig. 1) issues.Specifically, after exciting light is irradiated to the fluorescent material on wavelength-converting region, fluorescent material is excited to issue monochromatic light, and the monochromatic wave-length coverage is different from the wave-length coverage of exciting light.
[0041] in some embodiments, multiple color areas include the transmission area of one or more wavelength-converting regions for being coated with fluorescent material and uncoated fluorescent material.Transmission area refers to that incident side (right side in Fig. 1) received range of light wavelengths are identical as the range of light wavelengths that light emission side (left side in Fig. 1) issues.Specifically, exciting light is irradiated to after transmission area, can be directly through the transmissive region.
[0042] as shown in connection with fig. 2, which includes three areas Ge Se, and red fluorescence powder is wherein coated on the 12a of red color area, green emitting phosphor, unstressed configuration powder on transmission area 12c are coated on green area 12b.In the case where the first semiconductor light source 11 is to issue the laser of blue laser, blue laser, which is irradiated on the 12a of red color area, generates red fluorescence for conversion；Blue laser, which is irradiated on green area 12b, generates green fluorescence for conversion, and blue laser, which is irradiated on transmission area 12c, does not occur wavelength convert, projects still in the form of blue laser.First colour wheel 12 of the diagram then can divide inch to provide three kinds of feux rouges, green light and blue light monochromatic light with its own rotation relative to the first semiconductor light source 11；Feux rouges and green light belong to the first monochromatic light that wave-length coverage distinguishes, blue light then belongs to identical second monochromatic light of wave-length coverage relative to incident blue laser relative to incident blue laser.Though Fig. 2 is illustrated in a manner of three areas Ge Se, it is understood that, can also have 2,4,5 ... the areas n Ge Se on the first colour wheel.Above-mentioned red color area and green area are respectively feux rouges transition zone and green light transition zone, and blue region is then transmission area.It is above-mentioned that " red ", " green " used by fluorescent powder etc. is limited, refer to fluorescent powder under exciting light irradiation, feux rouges, green light are generated by corresponding, it is not used to be defined the color of fluorescent powder itself, red fluorescence powder, green emitting phosphor etc. can be referred to as red light fluorescent powder, green light fluorescent powder again.
[0043] in addition, multiple color areas of the first colour wheel 12 can have the distributed areas of same size, as shown in Figure 2.The light that each color area of this inch provides it is having the same go out light inch between namely the difference that externally provides of light supply apparatus 1 it is single
It is identical between colorama lighting inch.
[0044] alternatively, multiple color areas of the first colour wheel 12 also can have different size of distributed areas；In particular, multiple color areas angular dimension occupied on the first colour wheel 12 is different.To single color Qu Eryan, which refers to exciting light in the run trace in the color area, relative to the rotation center of the first colour wheel 12, is formed by segment angle, as shown in Figure 2 01.Each color area angle difference inch, the corresponding light provided have between different light inch out.Each color area angle not etc. can not refer to that each color area angle differs, and also can refer to the angle for wherein having one or more color areas, be different from the angle in its allochromatic colour area.Each color area angle of first colour wheel 12 differs, and can further cooperate with the gray-scale sensor of endoscopic system described later, improve the picture quality of endoscopic system.
[0045] light that optical system is used to divide inch to provide the first colour wheel 12 is oriented to light-emitting window 14.Optical system may include coupling mirror 13, and coupling mirror 13 is conducive to light importing the leaded light devices such as the optical fiber connecting with light supply apparatus 1 to light focusing.
[0046] light supply apparatus of the embodiment of the present invention provides the general lighting light of particular range of wavelengths by wavelength convert mode, the light without generating other useless wave-length coverages using the fluorescent material on exciting light irradiation colour wheel.The light source design can make full use of the light ray energy of exciting light, avoid energy dissipation, generated waste heat in device is reduced with inch, the monochromatic light for converting generation there can also be higher illumination intensity, help to improve the Image Acquisition quality under light supply apparatus illumination.In addition the area colour wheel Shang Se can flexible subregion, fluorescent material and semiconductor light source can flexible choice, so as to generate the illumination light closer to user demand.
[0047] in some embodiments of the invention, light supply apparatus 1 of the invention further includes test section 16, test section 16 can real inch detection configuration in the area optical path Shang Se of exciting light, so that it is determined that being which color area of the first colour wheel 12 is located in the optical path of exciting light, and test section 16 generates the indication signal in the color area for indicating detected according to testing result.According to the indication signal of the test section 16, the luminous flux for the exciting light that the first semiconductor light source 11 of control issues, i.e. light source control portion 15 control the exciting light that the first semiconductor light source 11 issues different luminous fluxes to not homochromy area in light source control portion 15.Such as, in the illustrated example shown in fig. 2, when test section 16 detects red color area 12a inch, light source control portion 15 makes the luminous flux of the first semiconductor light source 11 increase exciting light, it detects green area 12b inch, so that the first semiconductor light source 11 is reduced the luminous flux of exciting light, detect transmission area 12c inch, so that the first semiconductor light source is increased the luminous flux of exciting light, but increases situation of the degree lower than irradiation red color area 12a.In some examples, light supply apparatus 1 is preset with the corresponding relationship in not homochromy area and excitation light flux, after light source control portion 15 receives indication signal, the first semiconductor light source 11 can be determined the light of output according to the preset corresponding relationship
Flux magnitude.For example, laser or laser diode inch are used in the first semiconductor light source, by adjusting the operating current or PWM of laser or laser diode, i.e., the luminous flux size of the adjustable exciting light generated.Adjusting of the light supply apparatus 1 to excitation light flux, it can make light supply apparatus 1 convenient for providing the monochromatic light of different luminous fluxes and energy, the light source design equally can further cooperate with the gray-scale sensor of endoscopic system described later, improve the picture quality of endoscopic system.
[0048] in some examples, which includes photodetector and the marked body being arranged on colour wheel.Photodetector determines which color area currently detected be according to the reflected light received from marked body.Photodetector can be infrared photoelectric detector.Photodetector may include the photoelectric tube formed by light emitting portion and light receiver, and after the light that light emitting portion is issued to marked body is reflected, reflected light is received by light receiver, determines light intensity.Marked body on colour wheel may include the first marked body that reflectivity is high, absorptivity is low, and the reflected light of generation is stronger, and photodetector is corresponding to generate high level signal.Marked body on colour wheel may include the second marked body that reflectivity is low, absorptivity is high, and the reflected light of generation is weaker, and photodetector is corresponding to generate low level signal
.Photodetector is according to the power of reflected light, which kind of marked body is then can determine whether currently detected or the combination of marked body, to according to the corresponding relationship of marked body (or the marked body combination) and color area pre-established, which color area has been confirmly detected, indication signal corresponding with color area is accordingly generated.
[0049] for example, the mode of marked body permutation and combination can be used, to distinguish not homochromy area.Light supply apparatus can have 1: the first marked body of arrangement and the second marked body, arrange 2: the second marked bodies and the first marked body；Arrange 3: the second marked bodies and the second marked body.Under the permutation and combination method, photodetector will receive strong weak, weak strong and weak reflected light and combine signal, thus by the corresponding trivial point of Jian of color of each combination.
[0050] each marked body may be provided on the wheel body of colour wheel, be in particular arranged at the intersection of color area between any two.Each marked body may also be arranged in the shaft of colour wheel, and setting position is preferably corresponding with the boundary of color area between any two.It light breakdown or is destroyed to avoid marked body from being excited, the setting position of marked body will not fall into the optical path of exciting light on wheel body.
[0051] Fig. 3 shows the light supply apparatus 2 of another embodiment of the present invention, which includes the first semiconductor light source 11, the second semiconductor light source 21, the first colour wheel 12, optical system, light-emitting window 14, light source control portion 23 and test section 16.First semiconductor light source 11 divides inch to provide multiple monochromatic light of different wavelength range, make light supply apparatus 2 for common optical illumination, second semiconductor light source 21 generates the narrow-band light that can enhance angiography effect, make light supply apparatus 2 for special optical illumination, narrow-band usually can refer to several nanometers of wavelength bandwidth.Above-mentioned monochromatic light
Inch is divided to be transmitted to light-emitting window 14 through optical system with narrow-band light.Remove controllable first semiconductor light source 11 and the cooperation of the first colour wheel 12 in light source control portion 23, inch is divided to provide multiple monochromatic light of different wavelength range, also changeable first semiconductor light source 11 and the second semiconductor light source 21, make the two that inch be divided to work, that is 11 Jian of the first semiconductor light source opens inch, second semiconductor light source 21 is closed, and vice versa.First semiconductor light source 11, the first colour wheel 12 and test section 16 and embodiment shown in FIG. 1 have essentially identical configuration, are not repeated to describe herein.
[0052] second semiconductor light source 21 is laser or laser diode, and the narrow-band light generated can take the narrowband blue laser of at least any value within the scope of 390nm-460nm for peak wavelength；The narrow-band light can also be narrowband green laser.Particularly, using inch inside narrow-band optical illumination organism, can strong absorption because of blood to narrow-band light, improve the contrast of capillary, be conducive to improve medical endoscopes to the image quality and clarity of tissue.The narrow-band light is directly generated by semiconductor light source, equally takes full advantage of light ray energy, is reduced heat, is also improved the intensity of illumination of narrow-band optical illumination with inch.
[0053] as shown in figure 3, optical system includes dichroscope 22 and coupling mirror 13.Dichroscope 22 is arranged in the monochromatic optical path that narrow-band light and the first colour wheel 11 provide.Dichroscope 22 includes front side and rear side, this is forward and backward relative to light-emitting window definition, before close light-emitting window is, after being far from light-emitting window.The monochromatic light that first colour wheel 12 provides is transmitted in the front side of dichroscope 22 and rear side, and narrow-band light is reflected by the front side of dichroscope 22.It is acted on through the dichroscope 22, the optical path of the monochromatic light of transmission and the narrow-band light reflected is combined into same optical path.During two semiconductor light sources divide inch to work, monochromatic light and narrow-band light are acted on through dichroscope 22, and inch is divided to transmit along same optical path to light-emitting window 14.Coupling mirror 13 is arranged between light-emitting window 14 and dichroscope 22, can further make the light focusing in optical path.
[0054] in some embodiments of the invention, light supply apparatus of the invention may also include the second colour wheel 17, second colour wheel 17 also is included under the exciting light irradiation of the first semiconductor light source 11 sending, generates multiple monochromatic multiple color areas of different wavelength range.Such as, first colour wheel 12 and the second colour wheel 17 can color area configurations (number, fluorescent powder type, area size etc.) having the same, second colour wheel 17 this inch can be used as the acknowledgment copy of the first colour wheel 12, in the first light splitting 12 agings of wheel or face inch failure inch, then enable the second colour wheel 17, it is ensured that the normal operation of light supply apparatus.For example, the first colour wheel 12 and the second colour wheel 17 can have different color area configurations, such as number, fluorescent powder type and/or area size, in this way after exciting light irradiation, two colour wheels can provide different monochromatic light outputs.This inch, light supply apparatus can have the first operating mode and the second operating mode under normal light observation, and light source control portion 23 controls: the first colour wheel 12 only accesses the optical path of exciting light in the first operation mode
, the second colour wheel 17 only in the second operation mode access exciting light optical path；The two, which is formed under different working modes, divides inch working method.Such as, there are three color areas for first colour wheel tool, blue light, feux rouges and green light are provided respectively, and it is identical between the light inch out of three kinds of color lights, and the second colour wheel tool is there are four color area, provides blue light, feux rouges, green light and yellow light respectively, and feux rouges goes out between light inch to be longer than the going out between light inch of other color lights, the monochromatic light that yellow light is provided as the second colour wheel, wave-length coverage are different from three kinds of monochromatic light of the first colour wheel offer.This inch, the first colour wheel provide three primary colors colour imaging in the first operation mode, and the second colour wheel further provides for combining in the second operation mode the color image of yellow light image, finally changes the color developing effect of color image obtained.
[0055] the first above-mentioned colour wheel 12 and the second colour wheel 17 can be single rotating wheel, multiple color areas are the multiple regions marked off on wheel body, the single rotating wheel rotates inch, and multiple regions divide inch to rotate to the optical path of exciting light, the light that is successively excited irradiation.First colour wheel 12 and the second colour wheel 17 can also be the wheel group for including multiple rotating wheels, multiple color areas are located in multiple rotating wheels, in the rotary course of multiple rotating wheels, multiple regions divide inch to rotate to the optical path of exciting light, the light that is successively excited irradiation.
[0056] Fig. 4 is referred to, Fig. 4 provides a kind of endoscopic system 100 using light supply apparatus of the present invention.The endoscopic system 100 includes light supply apparatus 1 or 2, endoscope 3, host 4 and display 5;Can be under arrangement at other, which can further comprise the trolley of equipment carrying effect, form the pneumoperitoneum apparatus of pneumoperitoneum under minimally invasive environment, the cleaning equipment for cleaning endoscope 3 etc..By taking the light supply apparatus 2 of Fig. 3 as an example, light supply apparatus 2 is capable of providing common optical illumination and special optical illumination, and the endoscopic system 100 is other than normal light is observed, additionally it is possible to carry out the special light observation of narrow bandwidth.
The exciting light that [0057] first semiconductor light source 11 issues is irradiated on the first colour wheel 12 after focusing, with the rotation of the first colour wheel 12, different wave length transition zone thereon be successively excited light irradiation, generate the fluorescence of different colours, transmission area then penetrates the exciting light (fluorescence and the exciting light appeared are referred to as monochromatic light).Second semiconductor light source 21 can produce narrow-band light, such as narrowband indigo plant laser.Under general lighting mode, first semiconductor light source, 11 Jian is opened, second semiconductor light source 21 is closed, monochromatic light can pass through dichroscope 22, coupling mirror 13 enters the light-conductive optic fibre 31 of endoscope 3, light-conductive optic fibre 31 conducts monochromatic light to 32 front end of insertion section, carries out common optical illumination to tissue.Under special optical illumination mode, first semiconductor light source 11 is closed, second semiconductor light source, 21 Jian is opened, narrowband indigo plant laser is reflected by dichroscope 22, coupled mirror 13, which focuses, enters light-conductive optic fibre 31, light-conductive optic fibre 31 carries out special optical illumination by narrowband indigo plant laser conduction to 32 front end of insertion section, to tissue.It is to be illuminated
Tissue is imaged on gray-scale sensor 34 (such as CCD or cmos sensor) through object lens 33, the imaging control unit 41 of host 4 can control between the frame per second and exposure inch of gray-scale sensor 34, the picture signal that control unit 41, which is imaged, to be acquired based on gray-scale sensor 34 generates image, image data is passed to the systems control division 42 of host, again after the processing of image processor 43, it is finally shown on display 5.
[0058] wherein, under normal light observing pattern, between each monochromatic light inch out that imaging control unit 41 can be provided according to the first semiconductor light source 11, control gray-scale sensor 34 is carried out under each monochromatic light between the exposure inch of Image Acquisition.After gray-scale sensor 34 receives the light of self-organizing reflection, through the corresponding picture signal for generating electrical signal form of photoelectric conversion.Control unit 41 is imaged and receives corresponding output monochrome image after picture signal, each monochrome image is then synthesized into color image.Under special smooth observing pattern, narrow-band light that imaging control unit 41 is provided also according to the second semiconductor light source 21 goes out between light inch, and control gray-scale sensor 34 is between the exposure inch under narrow-band light.Narrow-band optical illumination inch, imaging control unit 41 are based on picture signal generation blood vessel and show apparent monochrome image.
[0059] light supply apparatus 1,2 of the invention is applied to 100 inch of endoscopic system, can further cooperate with its gray-scale sensor 34, improve the quality for the color image that endoscopic system 100 generates under common optical illumination.Particularly, gray-scale sensor has different responses to the monochromatic light of different wavelength range.As shown in figure 5, gray-scale sensor is higher than feux rouges and blue light to the responsiveness of green light.34 inch of light supply apparatus and gray-scale sensor of the invention is applied in combination, it can be from light-source angle, it is anisotropic to different monochromatic difference in response to compensate the gray-scale sensor: mode one, real inch adjusts the luminous flux of semiconductor light source output, guarantees that the light flux values for being irradiated to the first colour wheel regions of different colours meet desired proportion；Mode two designs the structure of the first colour wheel according to ratio between the monochromatic exposure inch of desired different colours, keeps ratio between the ratio of the occupancy angle of the first colour wheel regions of different colours and desired exposure inch identical.Gray-scale sensor can be made to eventually receive different monochromatic energy proportions by both modes and meet desired value, it can be with compensating for gray-scale sensor to the difference of different monochromatic photoresponses.
[0060] blue laser is provided with the first semiconductor light source 11, first colour wheel 12 is illustrated for having red color area 12a, green area 12b and blue region (i.e. transmission area 12c), but the specific example is only used for illustrating compensation of the light source design to gray-scale sensor, does not generate concrete restriction.
[0061] for example, according to gray-scale sensor 34 to the response difference of feux rouges, green light and blue light, the region of green area 12b can be reduced, the region of red color area 12a and blue region is increased, finally makes the area size in assorted area sort as follows: red color area 12a > blue region > green area 12b.Therefore, length meets between three kinds of monochromatic light inch out
: feux rouges > blue light > green light.Endoscopic system 100 runs inch, is imaged between the exposure inch of 41 synchronous adjustment gray-scale sensor 34 of control unit, shortens the exposure inch for making 34 couples of green area 12b of gray-scale sensor, lengthen between red color area 12a and the exposure inch of blue region.Under the configuration, when the constant inch of excitation light flux that the first semiconductor light source 11 issues, the green energy that gray-scale sensor 34 receives reduces, and feux rouges and blue light energy increase, and compensates for gray-scale sensor 34 and responds the strong, inconsistency weak to feux rouges and blue response to green light.
[0062] for example, the equal inch of each color area angle, according to gray-scale sensor 34 to the response difference of feux rouges, green light and blue light, the luminous flux of the first semiconductor light source 11 irradiation red color area 12a and blue region can be increased, and/or reduce the luminous flux that the first semiconductor light source 11 irradiates green area 12b, so that in the case where between same illumination inch, feux rouges, green light and blue light are by with different energy sizes, wherein three kinds of monochromatic energy sizes meet: feux rouges > blue light > green light.Endoscopic system 100 runs inch, the imaging control gray-scale sensor 34 of control unit 41 is exposed under three kinds of monochromatic light between identical inch, since three kinds of monochromatic energy that light supply apparatus 2 provides are of different sizes, feux rouges, blue light and the green energy difference that gray-scale sensor receives, compensate for gray-scale sensor 34 and respond the strong, inconsistency weak to feux rouges and blue response to green light.
[0063] for example, can both make the assorted area on the first colour wheel 12 that there is different angle size, the first semiconductor light source 11 can also be made to irradiate not homochromy area's inch with inch, issue the exciting light of different luminous fluxes.
[0064] above-mentioned imaging control unit 41 can detect the indication signal exported behind color area based on test section 16, be adjusted between the exposure inch of gray-scale sensor 34.Test section 16 exports indication signal to systems control division 42, systems control division 42 can determine the first semiconductor light source 11 by the luminous flux size of output according to the indication signal, the information of the luminous flux size is exported to light source control portion 23, the exciting light that the first semiconductor light source 11 exports the luminous flux size is controlled by light source control portion 23.Systems control division 42 can determine the first semiconductor light source 11 by the monochromatic color of output with inch according to the indication signal, the colouring information is notified to give imaging control unit 41, between imaging control unit 41 controls the exposure inch of the synchronous exposure of gray-scale sensor 34 accordingly, to obtain the monochrome image under corresponding color.
[0065] when the consistent inch of each monochrome image amplitude of gray-scale sensor output, such as under the area Tu2Se partitioned mode, feux rouges image, green light image inch consistent with the amplitude of blue light images, the color image quality finally synthesized is best.The picture amplitude depends on the image intensity signal that gray-scale sensor photoelectric conversion obtains.Therefore, above-mentioned in the scheme that assorted area distribution area size is adjusted or the excitation light flux for irradiating assorted area is adjusted, when gray-scale sensor is under the monochromatic light exposure of different-energy, the picture signal inch of same magnitude is obtained,
Imaging control unit 41 can obtain that amplitude is consistent or as identical as possible monochrome image.
[0066] above-mentioned endoscopic system is illuminated using semiconductor light source, Image Acquisition is carried out using gray-scale sensor, the disadvantage that light source life is short, luminous flux is unadjustable, special light observation light intensity is weak can be overcome, low image sensor resolutions, easy saturation, special light observation resolution ratio and the shortcomings that energy loss can be overcome with inch, and the two, which mutually cooperates with, so that endoscopic system is efficiently obtained high quality graphic.
[0067] the control circuit design for being controlled by systems control division can be used in light source control portion of the invention, other hardware designs, software, firmware or combinations thereof can also be used, imaging control unit of the invention can be used hardware, software, firmware or a combination thereof and realize in endoscopic system, so that endoscopic system can be according to described in various embodiments of the present invention, generate color image, the particular image of vascular effects enhancing, acquisition high quality graphic etc., the general processors such as used hardware such as MCU.
[0068] described above, the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although the present invention is described in detail referring to the foregoing embodiments, those skilled in the art should understand that: it is still possible to modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；And these are modified or replaceed, the range for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution.
Technical problem
Solution to the problem
Advantageous effect of the invention
Claims (1)
- ClaimsA kind of [claim 1] light supply apparatus characterized by comprisingLight source control portion；First semiconductor light source generates exciting light；First colour wheel comprising multiple color areas；Multiple color Qu Kefen inch of first colour wheel are located in the optical path of the exciting light；The multiple color area includes the one or more wavelength-converting regions for being provided with fluorescent material, the fluorescent material of the wavelength-converting region generates the first monochromatic light under the irradiation of the exciting light, and the first monochromatic wave-length coverage is different from the wave-length coverage of the exciting light；AndOptical system, for by the light-emitting window of light supply apparatus described in the described first monochromatic light directing.[claim 2] light supply apparatus according to claim 1, it is characterized in that, the multiple color area further includes transmission area, the transmission area provides the second monochromatic light under the irradiation of the exciting light, and the second monochromatic wave-length coverage is identical as the wave-length coverage of the exciting light.[claim 3] light supply apparatus according to claim 1, which is characterized in that multiple color areas of first colour wheel have different size of distributed areas.[claim 4] light supply apparatus according to claim 1, which is characterized in that further include:Second semiconductor light source, generates narrow-band light, and the optical system is also used to the light-emitting window of light supply apparatus described in the narrow-band light directing；Wherein the light source control portion controls first semiconductor light source and the second semiconductor light source divides inch to work.[claim 5] light supply apparatus according to claim 4, which is characterized in that the optical system includes dichroscope, and the optical path of the narrow-band light is combined into same optical path through the dichroscope with the described first monochromatic optical path.[claim 6] light supply apparatus according to claim 5, which is characterized in that the optical system further includes the coupling mirror being arranged between the dichroscope and the light-emitting window.[claim 7] light supply apparatus according to claim 1, which is characterized in that further include the second colour wheel comprising multiple color areas；Multiple color Qu Kefen inch of second colour wheel are located in the optical path of the exciting light, and inch is divided to generate multiple third monochromatic light under the irradiation of the exciting light；The light source control portion controls first colour wheel and the second colour wheel selects the access exciting light Optical path.Light supply apparatus according to claim 7, which is characterized in that the wave-length coverage of the multiple monochromatic one or more of third is different from the described first monochromatic wave-length coverage.Light supply apparatus according to claim 1-8, which is characterized in that the exciting light is blue laser, and one or more of wavelength-converting regions include feux rouges transition zone and green light transition zone；The fluorescent material of the feux rouges transition zone setting is red fluorescence material, which generates red monochromatic light under the irradiation of the blue laser；The fluorescent material of the green light transition zone setting is green fluorescent material, which generates green monochromatic light under the irradiation of the blue laser.Light supply apparatus according to claim 1-8, which is characterized in that further include: test section accordingly generates the indication signal in the color area for indicating detected for detecting the area optical path Shang Se for being located at the exciting light；The indication signal that the light source control portion is generated according to the test section controls the luminous flux for the exciting light that first semiconductor light source issues.A kind of endoscopic system characterized by comprisingThe described in any item light supply apparatus of claim 1-10；Insertion section, front end are furnished with gray-scale sensor, and gray-scale sensor carries out Image Acquisition under the first monochromatic light, obtain picture signal；Control system comprising imaging control unit and image processing part:For the imaging control unit according between the described first monochromatic light inch out, the picture signal between controlling the exposure inch that the gray-scale sensor carries out Image Acquisition under the first monochromatic light, and based on the gray-scale sensor generates image,The image that described image processing unit generates the imaging control unit carries out image procossing, image after output processing；AndDisplay, for showing image after the processing.
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| PCT/CN2016/107301 WO2018094696A1 (en) | 2016-11-25 | 2016-11-25 | Endoscope system, and light source device thereof |
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