CN102793525B - Endoscope-use light projection unit - Google Patents
Endoscope-use light projection unit Download PDFInfo
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- CN102793525B CN102793525B CN201210159819.3A CN201210159819A CN102793525B CN 102793525 B CN102793525 B CN 102793525B CN 201210159819 A CN201210159819 A CN 201210159819A CN 102793525 B CN102793525 B CN 102793525B
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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
- A61B1/06—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 with illuminating arrangements
- A61B1/0653—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 with illuminating arrangements with wavelength conversion
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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
- A61B1/00064—Constructional details of the endoscope body
- A61B1/00071—Insertion part of the endoscope body
- A61B1/0008—Insertion part of the endoscope body characterised by distal tip features
- A61B1/00096—Optical elements
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Abstract
When the open one of the present invention producing white light utilizing blue light excited fluophor, preventing the generation that form and aspect are uneven, and improving the endoscope-use light projection unit of the utilization ratio of blue light.Centre wavelength is made to be that first blue laser of 445nm is incident to fluorophor (50) via light guide (24a).In fluorophor (50), the part in the first incident blue laser is absorbed by fluorescent material and sends fluorescence, and by implant (50a) by the first blue laser that fluorescent material absorbs scattering is not occurred and the angle of divergence is expanded.The fluorescence of injection in fluorophor (50) and the first blue laser are to concavees lens (51) incidence.By making the angle of divergence of the first blue laser expand further in concavees lens (51), thus make the angle of divergence of the first blue laser consistent with the angle of divergence of fluorescence.In concavees lens (51), the first blue laser of injection and the conjunction glistening light of waves of fluorescence become white light and irradiate to subject.
Description
Technical field
The present invention relates to and be arranged on forward end section of endoscope, irradiate the endoscope-use light projection unit of illumination light to subject.
Background technology
In the medical field, the Treatment and diagnosis employed in the subject of endoscope widely carries out.Endoscope possesses the insertion section be inserted in subject, irradiates illumination light from the illuminating window of the leading section being arranged on this insertion section towards subject.Further, by being arranged on the imaging apparatuss such as the CCD of the leading section of insertion section, the subject thrown light on by illumination light is made a video recording, and based on the image pickup signal obtained by this shooting, show endoscopic images on a monitor.
Illumination in subject uses the white light of xenon lamp (キ セ ノ Application ラ Application プ) or Halogen light (Ha ロ ゲ Application ラ Application プ) etc. mostly, but xenon lamp etc. exist than relatively large, and the problem that power consumption is also large.On the other hand, in patent documentation 1, by the blue light of blue led (LightEmittingDiode) and the conjunction ripple of fluorescence that utilizes this blue light excited fluophor and send, generate white light.Like this, use blue led and fluorophor to generate white light, thus relative to xenon lamp etc., miniaturization and electric power saving can be realized.
[at first technical literature]
[patent documentation]
[patent documentation 1] Japanese Unexamined Patent Publication 2006-61685 publication
As Patent Document 1, when generate make blue light incident to fluorophor when white light time, the blue light of a part is absorbed by fluorophor and sends fluorescence, on the other hand, the direct straight ahead ground of remaining blue light through.Therefore, in the fluorescence penetrated from fluorophor and blue light, the angle of divergence (Wide Ga り angle) is different respectively.Thus, because of the difference of such angle of divergence, and become white in the colour mixture region that subject blueing coloured light overlaps with fluorescence, but when forming the immiscible territory, zone that these light do not overlap, this territory, immiscible zone becomes the color beyond white.That is, subject produces form and aspect uneven (color む ら).Producing in the endoscopic images obtained under the uneven state of such form and aspect, correct diagnosis cannot be carried out.
As one of the method for the generation preventing form and aspect uneven, consider the method having the implant being mixed into the blue light scattering penetrated with making straight ahead in fluorophor.Being mixed into by this implant, the angle of divergence of blue light expands, therefore, it is possible to it is uneven to reduce form and aspect, and it is roughly eliminated.But, because implant makes blue light to all the winds scattering, therefore, because of the difference of its incorporation rate, there is the blue light only not arriving subject in fluorophor inscattering and become many situations.Under these circumstances, being mixed into of implant makes the utilization ratio of blue light reduce.
Summary of the invention
When the object of the present invention is to provide one to produce white light utilizing blue light excited fluophor, the generation that form and aspect are uneven can be prevented, and the endoscope-use light projection unit of the utilization ratio of blue light can be improved.
To achieve these goals, the invention provides a kind of endoscope-use light projection unit, it is arranged on forward end section of endoscope, illumination light is irradiated towards subject, the feature of described endoscope-use light projection unit is, possess: wavelength convert mechanism, it has the wavelength conversion section of carrying out wavelength convert to the part in the first illumination light of provision wavelengths and generating the second illumination light and makes do not carried out the first illumination light scattering of wavelength convert by described wavelength conversion section and expand the scattering component of its angle of divergence; The angle of divergence expands mechanism, the angle of divergence of the first illumination light penetrated in described wavelength convert mechanism expands by further, and this angle of divergence is irradiated to described subject as described illumination light by the conjunction glistening light of waves of the first illumination light after expanding further and the second illumination light.
The preferred angle of divergence expands mechanism makes the angle of divergence of the first illumination light consistent with the angle of divergence of the second illumination light.It is concavees lens that the preferred angle of divergence expands mechanism.
Preferably the first illumination light is the first blue narrow band of light of provision wavelengths, second illumination light is the fluorescence by wavelength conversion section, the first blue narrow band of light being carried out green ~ redness that wavelength convert obtains, and concavees lens make the angle of divergence of the first blue narrow band of light consistent with the angle of divergence of fluorescence.Preferably the centre wavelength of the first blue narrow band of light is 445nm.
Preferably the first illumination light is different first and second the blue narrow band of light of mutual centre wavelength, second illumination light is the fluorescence by wavelength conversion section, first and second blue narrow band of light being carried out green ~ redness that wavelength convert obtains, and concavees lens make the angle of divergence of first and second blue narrow band of light consistent with the angle of divergence of fluorescence.Preferably the centre wavelength of the first blue narrow band of light is 445nm, and the centre wavelength of the second blue narrow band of light is 405nm.
Optimal wavelength shifter is fluorophor.Preferred scattering component is implant.Preferably the first illumination light is blue laser.In addition, when the incorporation rate of implant is 5%, the curvature of preferred concavees lens is 0.3 ~ 0.6, and when the incorporation rate of implant is 7%, the curvature of preferred concavees lens is 0.1 ~ 0.4.
[invention effect]
According to the present invention, when generating the second illumination light carrying out wavelength convert by wavelength convert mechanism to the part in the first illumination light of provision wavelengths, the angle of divergence of not carried out the first illumination light of wavelength convert by wavelength convert mechanism becomes large by the in-house scattering component of wavelength convert, and expands mechanism by the incident angle of divergence after the injection of wavelength convert mechanism and become large further.Thereby, it is possible to make the angle of divergence of the first illumination light consistent with the angle of divergence of the second illumination light, therefore, it is possible to the generation preventing form and aspect uneven.
Further, in the present invention, the in-house scattering component of wavelength convert and the angle of divergence is divided into expand the angle of divergence that both mechanisms expand the first illumination light.Therefore, from the utilization ratio fermentation of the first illumination light, even if be only mixed into minimal scattering component in wavelength convert mechanism, and when the angle of divergence of the first illumination light fully cannot be expanded in wavelength convert mechanism, expand mechanism by the angle of divergence afterwards the angle of divergence is expanded further, the angle of divergence of the first illumination light also can be made thus consistent with the angle of divergence of the second illumination light.Thereby, it is possible to the generation preventing form and aspect uneven under the state of utilization ratio that improve the first illumination light.
Accompanying drawing explanation
Fig. 1 is the figure of the endoscopic system representing the first embodiment.
Fig. 2 is the figure in the cross section of the leading section representing fujinon electronic video endoscope.
Fig. 3 is the figure of the front end face of the leading section representing fujinon electronic video endoscope.
Fig. 4 is the chart representing the utilization ratio of the first blue laser and the relation of implant incorporation rate.
Fig. 5 represents from the first blue laser after fluorophor injection and the angle of divergence of fluorescence and the relation of light intensity, and represents the figure of irradiation area when being irradiated to subject from the first blue laser after this fluorophor penetrates and fluorescence.
Fig. 6 represents from the first blue laser after concavees lens injection and the angle of divergence of fluorescence and the relation of light intensity, and represents the figure of irradiation area when being irradiated to subject from the first blue laser after this fluorophor penetrates and fluorescence.
Fig. 7 is the figure of the endoscopic system representing the second embodiment.
Fig. 8 represents from first, second blue laser after fluorophor injection and the angle of divergence of fluorescence and the relation of light intensity, and represents the figure of irradiation area when being irradiated to subject from first, second blue laser after this fluorophor penetrates and fluorescence.
Fig. 9 represents from first, second blue laser after concavees lens injection and the angle of divergence of fluorescence and the relation of light intensity, and represents the figure of irradiation area when being irradiated to subject from first, second blue laser after this fluorophor penetrates and fluorescence.
Figure 10 is the figure possessing function and these two functions of light diffusion function making fluorescence excitation luminescence for illustration of fluorescent material.
Figure 11 is the figure of the assay method for illustration of light quantity distribution.
Figure 12 is the figure representing the light projection unit used in embodiment 1-1,1-2.
Figure 13 is the chart representing the difference of half value fabric width and the relation of implant incorporation rate.
Figure 14 is the figure for illustration of half value fabric width.
Figure 15 is the chart of the relation of the difference of half value fabric width when representing that implant incorporation rate is 5% and the curvature of concavees lens.
Figure 16 is the chart of the relation of the difference of half value fabric width when representing that implant incorporation rate is 7% and the curvature of concavees lens.
Figure 17 is the figure representing the light projection unit used in embodiment 2-1,2-2.
Figure 18 is the chart representing the difference of half value fabric width and the relation of implant incorporation rate.
Figure 19 is the chart of the relation of the difference of half value fabric width when representing that implant incorporation rate is 7% and the curvature of concavees lens.
Figure 20 is the chart of the relation of the difference of half value fabric width when representing that implant incorporation rate is 5% and the curvature of concavees lens.
Figure 21 is the figure representing the light projection unit used in comparative example 1.
Figure 22 is the figure representing the light projection unit used in comparative example 2.
Figure 23 is the figure representing the light projection unit used in comparative example 3.
[symbol description]
38 first light projection unit
39 second light projection unit
50 fluorophor
50a implant
51 concavees lens
Detailed description of the invention
As shown in Figure 1, the endoscopic system 2 of the first embodiment possesses: the fujinon electronic video endoscope 10 of shooting subject; Generate the blood processor 12 of endoscopic images; Be arranged in this blood processor 12, supply the light supply apparatus 13 to the illumination light that subject throws light on; The monitor 14 of display endoscopic images; And the water be sent in subject accumulated send water tank 16.
Fujinon electronic video endoscope 10 comprises: the endoceliac insertion section 20 being inserted into patient; Be connected with the cardinal extremity part of insertion section 20, the people performed an operation for doctor or technician etc. carries out the operating portion 22 operated by handle; From the general flexible cord 24 that operating portion 22 extends.Insertion section 20 is made up of leading section 26, bending section 27 and flexible curved tube portion 28 in turn from front end.Leading section 26 is formed by the resin material of hard.Flexible curved tube portion 28 is formed as thin footpath and rectangular tubulose, and has flexibility, is connected by operating portion 22 with bending section 27.
Bending section 27 is configured to according to bending vertically and horizontally with the rotation process of operation knob 30 and left and right operation knob 31 up and down of arranging on operating portion 22.When to when carrying out rotation process with operation knob 30 up and down, bending section 27 vertically bends, and when carrying out rotation process to left and right operation knob 31, bending section 27 bends in the lateral direction.
General flexible cord 24 is provided with adapter 36, and when being taken into the light and air that supply from blood processor 12, this adapter 36 is for the transmission of power supply or various control signal.Fujinon electronic video endoscope 10 is detachably connected with blood processor 12 via adapter 36.
Light supply apparatus 13 possesses and sends the first LASER Light Source 13a that centre wavelength is first blue laser of 445nm.The first blue laser sent from the first LASER Light Source 13a via light guide 24a, the 24b in general flexible cord 24 by the leading section 26 of leaded light to fujinon electronic video endoscope.The fluorophor 50 being arranged on leading section 26 by a part for the first blue laser of leaded light absorbs, thus makes the fluorescence excitation of green ~ redness luminous, and the first blue laser do not absorbed by fluorophor is directly through fluorophor.Thus, the white light the first blue laser and fluorescence mixed is irradiated from leading section 26 to subject.From the back light of subject by imaging apparatus 42 (with reference to Fig. 3) shooting in fujinon electronic video endoscope 10 as the picture of subject.In addition, light guide 24a, 24b is made up of light conducting members such as optical fiber.
Blood processor 12 receives via signal cable (the signal ケ mono-Block Le) 24c in general flexible cord 24 image pickup signal obtained by the shooting of fujinon electronic video endoscope 10.In blood processor 12, various image procossing is implemented to the image pickup signal received, carrys out image data generating.And according to the view data of this generation, monitor 14 shows the endoscopic images of subject.
As shown in Figure 2, be provided with in the leading section 26 of fujinon electronic video endoscope: for irradiating first and second light projection unit 38,39 of two lamps of illumination light towards subject; And by the picture image unit 43 taken of the imaging apparatuss such as CCD 42 to the subject of light via observation window 40 and imaging lens system 41.
As shown in Figure 3, first and second light projection unit 38,39 is arranged on about the symmetrical position of image unit 43 at the front end face 26a of leading section 26.In addition, in leading section 26 except first and second light projection unit 38,39, except image unit 43, be also provided with disposal appliance outlet 46 that disposal appliance such as making grabber (ス ネ ア) exposes, spray the air of cleaning or the aspirated and water sending nozzle 48 of water towards observation window 40.
As shown in Figure 2, the first light projection unit 38 possesses: fluorophor 50, and a part for the first blue laser by light guide 24a leaded light absorbs and sends the fluorescence of green ~ redness by it, and make unabsorbed light directly through; Concavees lens 51, it possesses the angle of divergence expanded functionality angle of divergence of the first blue laser penetrated from fluorophor 50 expanded, and has the function of the illuminating window that the first blue laser after making this angle of divergence of expansion and fluorescence penetrate towards subject.At this, fluorophor 50 is a kind of mode of wavelength convert mechanism, and concavees lens 51 are a kind of mode of angle of divergence expansion mechanism.
In this first light projection unit 38, fluorophor 50 is kept by lock pin 55 with the state be connected optically each other with light guide 24a.Lock pin 55 is the cylinder element of hollow, and light guide 24a is through in the through hole 55a extended vertically.In addition, in lock pin 55, by bonding agent 56, fluorophor 50 is fixed in roughly cylindric or rectangular-shaped incorporating section, the front end 55b that front has peristome.
This lock pin 55 is kept by sleeve 60 together with concavees lens 51.This sleeve 60 keeps lock pin 55 and concavees lens 51 with the state that the plane of incidence of the exit facet of fluorophor 50 and concavees lens 51 is facing.
Fluorophor 50 is by using fluorescent material with mix as the covering member such as implant 50a and unorganic glass of a mode of scattering component and formed, wherein, fluorescent material absorbs a part for blue laser and sends fluorescence, and implant makes the blue laser scattering do not absorbed by this fluorescent material.As long as the material that fluorescent material can be excited by the first blue laser, be not particularly limited, but preferably use
One in following (i) ~ (xi) or two kinds are combinationally used.
(i) alkaline-earth metal (ア Le カ リ soil
metal) halogen phosphorus Calx (Ha ロ ゲ Application ア パ タ イ ト),
(ii) alkaline-earth metal halogen borate (ホ ウ acid Ha ロ ゲ Application),
(iii) alkali earth metal aluminate (ア Le ミ ン Suan salt),
(iv) nitrogen oxide or nitride,
(v) alkali earths silicate, alkali earths silicon nitride,
(vi) sulfide,
(vii) alkali earths thiogallate (ア Le カ リ soil
チ オ ガ レ mono-ト),
(viii) germanate (ゲ Le マ ン Suan salt),
(ix) terres rares aluminate,
(x) terres rares silicate,
(xi) mainly through organic and organic complex that group of the lanthanides such as Eu (ラ Application タ ノ イ De system) are element activated
In addition, also can replace fluorescent material, and use (Li are as fluorescent dyes such as ， perylenes (ペ リ レ Application)) such as pigment.
As implant 50a, there are silicon dioxide (aerosil (ヒ コ mono-system シ リ カ), settleability silicon dioxide (Shen falling property シ リ カ), fused silica, crystalline silica (Knot brilliant シ リ カ), superfine powder amorphous silica, silica anhydride (No water Gui acid) etc.), quartz, titanium oxide, stannum oxide, zinc oxide, tin monoxide, calcium oxide, magnesium oxide, beryllium oxide, aluminium oxide, boron nitride, silicon nitride, the metal nitrides such as aluminium nitride, the metal carbides such as SiC, calcium carbonate, potassium carbonate, sodium carbonate, magnesium carbonate, the metal carbonates such as brium carbonate, aluminium hydroxide, the metal hydroxidess such as magnesium hydroxide, Alborex M 12 (ほ う acid ア Le ミ ニ ウ system), Barium metatitanate., calcium phosphate, calcium silicates, earth (Network レ mono-), Gypsum Fibrosum, barium sulfate, Muscovitum, kieselguhr (ケ イ ソ ウ soil), potter's clay (hargil), inorganic spheres (No Machine バ Le one Application), Talcum (タ Le ケ), lithopone (リ ト Port Application), zeolite (ゼ オ ラ イ ト), galapectite (Ha ロ イ サ イ ト), fluorescent material, sheet metal (argentum powder etc.) etc.In addition, in order to obtain intensity, the implant of the needle-likes such as potassium titanate, barium silicate, glass fibre can also be used.Wherein, preferred Barium metatitanate., titanium oxide, aluminium oxide, silicon oxide etc.
Utilize implant 50a to the difference of the incorporation rate of fluorophor 50, can adjust the angle of divergence of the first blue laser penetrated from fluorophor 50.Usually, in the angle of divergence ratio due to first blue laser of short wavelength ~ angle of divergence of the fluorescence of long wavelength is little, and the incorporation rate therefore by increasing implant 50a expands the angle of divergence of the first blue laser, thus realizes the uneven elimination of form and aspect.But when improve the incorporation rate of implant 50a, the first blue laser only not arriving subject in fluorophor 50 inscattering becomes many.This become the utilization ratio of blue laser is reduced reason it
Such as, in the light quantity Ia of the first blue laser will sent from the first LASER Light Source 13a, the ratio (Ib/Ia × 100 (%)) of the light quantity Ib of the blue laser of actual arrival subject is as utilization ratio, and using the containing ratio of implant 50a that occupies in fluorophor 50 as implant incorporation rate when, the relation of utilization ratio and implant incorporation rate is as shown in Figure 4.According to this Fig. 4, along with the increase of implant incorporation rate, utilization ratio reduces, and when implant incorporation rate becomes 10%, utilization ratio is 50%, that is, represent that the first blue laser sent from the first LASER Light Source 13a, only half is used in the illumination of subject.
Therefore, in order to expand the angle of divergence of the first blue laser when not reducing the utilization ratio of the first blue laser, and make the concavees lens 51 that the angle of divergence of the first blue laser penetrated from fluorophor 50 expands further.Such as, when in order to utilization ratio is remained fixing above and only bottom line is mixed into implant 50a, as shown in Figure 5, fully do not expand from the angle of divergence of the first blue laser after fluorophor 50 injection.Therefore, the field of illumination on subject produces the immiscible zone territory R1 that the first blue laser does not overlap with fluorescence.
The angle of divergence of first blue laser that cannot fully be expanded by this implant 50a is expanded further by concavees lens 51.On the other hand, although the first blue laser and fluorescence are all incident to concavees lens 51, because fluorescence is larger than the first blue laser wavelengths, therefore according to Si Nieer (ス ネ Le) law, the angle of divergence of fluorescence is such not as blue light.Therefore, as shown in Figure 6, by concavees lens 51, the angle of divergence of the first blue laser can be expanded to the angle of divergence of fluorescence.Thus, the immiscible zone territory R1 (with reference to Fig. 5) that the first blue laser does not overlap with fluorescence portion disappears, therefore, it is possible to the generation preventing form and aspect uneven.
In addition, preferred concavees lens 51 have the refracting power (refracting power) (focal power (power)) that can make from the angle of divergence of the first blue laser of the fluorophor 50 injection degree consistent with the angle of divergence of fluorescence.Therefore, in the angle of divergence hour of the first blue laser penetrated from fluorophor 50, increase refracting power, when the angle of divergence of the first blue laser penetrated is large, reduce refracting power.
Second light projection unit 39 possesses the fluorophor 50 same with the first light projection unit 38, concavees lens 51, lock pin 55 and sleeve 60.In addition, the configuration etc. of each component of the second light projection unit 39 is same with the first light projection unit 38.Therefore, detailed description is omitted.
As shown in Figure 7, in the endoscopic system 100 of the second embodiment, in light supply apparatus 13, new setting sends the second LASER Light Source 13b that centre wavelength is second blue laser of 405nm, the first blue laser being 445nm by the centre wavelength that sends from the first LASER Light Source 13a and make phosphor excitation from both the second blue lasers that the centre wavelength that the second LASER Light Source 13b sends is 405nm.In addition, same with the first embodiment in addition, therefore omit detailed description.
In the endoscopic system 100 of the second embodiment, the second blue laser sent from the second LASER Light Source 13b closes ripple with the first blue laser sent from the first LASER Light Source 13a by synthesizer 101, and the light after this conjunction ripple is guide-lighting to fluorophor 50 by light guide 24a, 24b.And, incident to fluorophor 50 by the conjunction glistening light of waves of first and second blue laser, a part for first and second blue laser is absorbed by the fluorescent material of fluorophor 50 and sends fluorescence, and first and second blue laser remaining, by the implant 50a in fluorophor 50, scattering occurs.
Same with the first embodiment, in order to avoid the reduction of the utilization ratio of first and second blue laser, implant 50a is only minimally mixed in fluorophor.Therefore, as shown in Figure 8, although the angle of divergence of first and second blue laser is expanded by the scattering of implant 50a, the angle of divergence of fluorescence is not expanded to.Therefore, the immiscible zone territory R2 that fluorescence does not overlap with first and second blue laser is formed.
First and second blue laser of injection in fluorophor 50 and fluorescence are to concavees lens 51 incidence.By these concavees lens 51, the angle of divergence of first and second blue laser is expanded, thus as shown in Figure 9, the angle of divergence of first and second blue laser is roughly consistent with the angle of divergence of fluorescence.Thus, immiscible zone territory R2 (with reference to Fig. 8) disappears, and can not produce form and aspect uneven.First and second blue laser and the fluorescence of injection in concavees lens 51 become white light and irradiate to subject.
In addition, in this second embodiment, also preferably concavees lens 51 have the refracting power (focal power) that can make from the angle of divergence of first and second blue laser of the fluorophor 50 injection degree consistent with the angle of divergence of fluorescence.Due to the first blue laser short wavelength of centre wavelength to be second blue laser of 405nm than centre wavelength be 445nm, therefore in concavees lens 51, refractive index uprises.Thus concavees lens 51 need to decide refracting power according to the angle of divergence of first and second blue laser penetrated from fluorophor 50, and need the wavelength difference considering first and second blue laser to decide refracting power.
In addition, in the first and the second embodiments, by being mixed into implant in fluorophor, the angle of divergence of the emergent light from fluorophor injection is expanded, but also can not be mixed into implant, and expand to make the angle of divergence by means of only the light scattering function that the fluorescent material of fluorophor has.Such as, when when the first embodiment, then as shown in Figure 10, in fluorophor 50, the first blue laser that green light fluorescent material 80 is not 445nm by means of only centre wavelength makes green fluorescence excitation luminous, but also makes by glowing with the fluorescent scattering of the redness of fluorescent material 81 stimulated luminescence.Equally, glow and do not make the fluorescence excitation luminescence of redness with fluorescent material 81 by means of only the first blue laser, but also make the fluorescent scattering of the green by green light fluorescent material 80 stimulated luminescence.Like this, by producing the light diffusion function that each fluorescent material 80,81 has, the angle of divergence of the emergent light penetrated from fluorophor 50 also can be expanded when not being mixed into implant 50a.
In addition, when when the second embodiment, first blue laser and be about 10% being absorbed by fluorescent material and send fluorescence of the second blue laser of 405nm to the centre wavelength of fluorophor incidence, on the other hand, not by fluorescent material absorb about 90% the second blue laser spread by other fluorescent material.Therefore, in this second embodiment, by adjusting green light and glowing with the incorporation rate of fluorescent material, when not being mixed into implant 50a, the angle of divergence of the second blue laser just can be made to expand.
In addition, for the assay method of the light quantity distribution of fluorescence, blue laser, carry out like this preferably.As shown in figure 11, first (or second) light projection unit 38 as light source is arranged on center, leave first of fixed range locate from irradiating center C in the face orthogonal with the optical axis L of this light projection unit 90, carried out the mensuration of light quantity by actinometry device 90.The dosimetric value at this first place of locating is the light intensity at 90 °, luminous intensity distribution (luminous intensity distribution) angle.Then, being moved to by actinometry device 90 locates from first circumferentially leaves second of fixed angle A and locates, and carries out the mensuration of light quantity.The dosimetric value at this second place of locating is the light intensity of light distribution angle (90-A) °.Equally, to stagger actinometry device every fixed angle, and obtain the light intensity of light distribution angle simultaneously.Thus, the light quantity distribution (such as Fig. 5 etc.) at light distribution angle+90 ° ~-90 ° place is obtained.
[embodiment]
By following embodiment 1-1 ~ 2-2 and comparative example 1 ~ 3, the present invention is specifically described further.
[embodiment 1-1]
In embodiment 1-1, the first light projection unit 38 shown in Figure 12 and second light projection unit 39 both same with this first light projection unit 38 are set in the leading section of fujinon electronic video endoscope 10.First light projection unit 38 is connected with the first LASER Light Source 13a optically by light guide 24a, makes centre wavelength be that first blue laser of 445nm is incident via this light guide 24a.In the first light projection unit 38, make the first blue laser from light guide 24a incident to fluorophor 50.In fluorophor 50, a part for the first blue laser is absorbed by fluorescent material and sends the fluorescence of 500nm ~ 700nm, on the other hand, makes remaining first blue laser scattering and make its angle of divergence become large by implant 50a.The incorporation rate of implant 50a is 5%.First blue laser and fluorescence are the exit facet injection of the fluorophor 50 of 0.9mm from diameter.First blue laser of injection in fluorophor 50 and fluorescence are to concavees lens 51 incidence.By these concavees lens 51, the angle of divergence of the first blue laser is expanded further.First blue laser and the fluorescence of injection in concavees lens 51 become white light and irradiate to subject.In addition, from the second light projection unit 39 too, by made by implant and concavees lens the angle of divergence expand after the first blue laser and fluorescence become white light and irradiate to subject.
In this embodiment 1-1, by simulating the curvature that the difference obtaining the half value fabric width of fluorescence and the first blue laser is the concavees lens 51 of less than 3.5 °.In addition, when not using concavees lens 51, as shown in figure 13, when implant incorporation rate is 10%, the difference of the half value fabric width of the first blue laser and the half value fabric width of fluorescence is 3.5 °.If the difference of this degree, then substantially do not produce form and aspect uneven.Therefore, as shown in embodiment 1-1, when implant incorporation rate is 5%, make half value fabric width be less than 3.5 ° by the focal power of concavees lens 51, eliminate form and aspect thus uneven.In addition, as shown in figure 14, the width of light distribution angle when " half value fabric width " refers to that light intensity becomes 50%.
In addition, when simulating, the thickness T of concavees lens being set as 0.2mm, effective diameter is set as 1.5mm, being set as 1.9079 by the refractive index of the first blue laser, being set as 1.8817 by the refractive index of fluorescence.
As shown in figure 15, more increase curvature, the difference of half value fabric width more diminishes the result of simulation.When curvature is more than 0.4, the difference of half value fabric width becomes less than 3.5 °, and when curvature becomes 0.6, the difference of half value fabric width is about 2.5 °.Therefore, use in embodiment 1-1 curvature be 0.6 concavees lens 51.
[embodiment 1-2]
The incorporation rate of implant 50a is 7%, under this implant incorporation rate, becomes the curvature of the concavees lens of less than 3.5 ° by simulating the difference obtaining the half value fabric width of fluorescence and the first blue laser.In addition, implement in the same manner as embodiment 1-1.
As shown in figure 16, although with curvature 0.3 for border, and the difference of half value fabric width increases and decreases the result of simulation, and be between 0.1 ~ 0.4 in curvature, the difference of half value fabric width is suppressed to less than 3.5 °.Therefore, in embodiment 1-2, use the concavees lens 51 of the fixed value between 0.1 ~ 0.4 as curvature.
[embodiment 2-1]
As shown in figure 17, except the first blue laser that centre wavelength is 445nm, centre wavelength is also made to be that second blue laser of 405nm is to fluorophor 50 incidence, in the concavees lens 51 with following lens data, except expanding the angle of divergence of first and second blue laser, and make the incorporation rate of implant be beyond 7%, implement in the same manner as embodiment 1-1.In addition, in embodiment 2-1, the first blue laser sent from the first LASER Light Source 13a and after closing ripple from the second blue laser that the second LASER Light Source 13b sends by synthesizer 101, incident to light guide 24a.
In this embodiment 2-1, the difference D (| Δ θ 1-Δ θ 2|) obtaining the difference Δ θ 2 of the difference Δ θ 1 of the half value fabric width of fluorescence and the first blue laser and the half value fabric width of fluorescence and the second blue laser by simulation becomes the curvature of minimum concavees lens 51.In addition, when not using concavees lens 51, residual quantity value D as shown in figure 18, minimum when implant incorporation rate is 10% (residual quantity value D is about 2 °), does not now roughly produce form and aspect uneven.Therefore, the curvature that residual quantity value D becomes the concavees lens 51 of less than 2 ° is obtained.In addition, when simulating, making the refractive index of the second blue laser is 1.9207, and parameter (thickness T, effective diameter, the refractive index to the first blue laser, the refractive index to fluorescence) is in addition same with embodiment 1-1.
As shown in figure 19, when curvature 0.1, residual quantity value D becomes " 0 " result of simulation.Therefore, in embodiment 2-2, use curvature is the concavees lens 51 of 0.1.
[embodiment 2-2]
The incorporation rate of implant 50a is 5%, under the incorporation rate of this implant, obtains by simulation the curvature that residual quantity value D becomes the concavees lens 51 of less than 2 °.Implement in the same manner as embodiment 2-1 in addition.
As shown in figure 20, be between 0.3 ~ 0.4 in curvature, residual quantity value D is less than 2 ° to the result of simulation.Therefore, in embodiment 2-2, use the concavees lens 51 of the fixed value between 0.3 ~ 0.4 as curvature.
[comparative example 1]
As shown in figure 21, the refractive illuminating window 52 of not tool is set in first and second light projection unit 38,39, expands the angle of divergence of the first blue laser by means of only implant 50a.The incorporation rate of implant 50a is larger than embodiment 1-1.Implement in the same manner as embodiment 1-1 in addition.
[comparative example 2]
As shown in figure 22, except arranging except the refractive illuminating window 52 of not tool in first and second light projection unit 38,39, implement in the same manner as embodiment 1-1.
[comparative example 3]
As shown in figure 23, except arranging except the refractive illuminating window 52 of not tool in first and second light projection unit 38,39, implement in the same manner as embodiment 2-1.
[result]
In embodiment 1-1 ~ 2-2, by implant 50a is used together with concavees lens 51, form and aspect can be eliminated uneven when not reducing the utilization ratio as the blue laser (be the first blue laser in embodiment 1-1,1-2, be first and second blue laser in embodiment 2-1,2-2) of excited light.On the other hand, in comparative example 1, by improving the incorporation rate of implant 50a, can realize the elimination that form and aspect are uneven, and on the other hand, the light not arriving subject becomes many, the utilization ratio of the first blue laser reduces.In addition, in comparative example 2, because the angle of divergence of the first blue laser is narrower than the angle of divergence of fluorescence, therefore produce form and aspect uneven.In addition, in comparative example 3, because the angle of divergence of first and second blue laser is narrower than the angle of divergence of fluorescence, therefore also produce form and aspect uneven.
Claims (18)
1. an endoscope-use light projection unit, it is arranged on forward end section of endoscope, and irradiate illumination light towards subject, the feature of described endoscope-use light projection unit is to possess:
Wavelength convert mechanism, it has the wavelength conversion section of carrying out wavelength convert to a part for the first illumination light of provision wavelengths and generating the second illumination light and makes do not carried out the first illumination light scattering of wavelength convert by described wavelength conversion section and expand the scattering component of its angle of divergence;
The angle of divergence expands mechanism, the angle of divergence of described first illumination light in the light penetrated in described wavelength convert mechanism can expand than the angle of divergence of described second illumination light by larger, and the conjunction glistening light of waves of the first illumination light after extended for these angles of divergence and the second illumination light is irradiated as described illumination light to described subject
Injection in described wavelength convert mechanism and to expand the angle of divergence of described first illumination light before mechanism's incidence to the described angle of divergence less than the angle of divergence of described second illumination light, the angle of divergence expanding described first illumination light in mechanism after injection in the described angle of divergence is consistent with the angle of divergence of described second illumination light.
2. endoscope-use light projection unit according to claim 1, is characterized in that,
It is concavees lens that the described angle of divergence expands mechanism.
3. endoscope-use light projection unit according to claim 2, is characterized in that,
Described first illumination light is the first blue narrow band of light of provision wavelengths, and described second illumination light is the fluorescence by described wavelength conversion section, described first blue narrow band of light being carried out to green ~ redness that wavelength convert obtains,
Described concavees lens make the angle of divergence of described first blue narrow band of light consistent with the angle of divergence of described fluorescence.
4. endoscope-use light projection unit according to claim 3, is characterized in that,
The centre wavelength of described first blue narrow band of light is 445nm.
5. endoscope-use light projection unit according to claim 2, is characterized in that,
Described first illumination light is different first and second the blue narrow band of light of mutual centre wavelength, and described second illumination light is the fluorescence by wavelength conversion section, first and second blue narrow band of light described being carried out green ~ redness that wavelength convert obtains,
Described concavees lens make the angle of divergence of first and second blue narrow band of light described consistent with the angle of divergence of described fluorescence.
6. endoscope-use light projection unit according to claim 5, is characterized in that,
The centre wavelength of described first blue narrow band of light is 445nm, and the centre wavelength of described second blue narrow band of light is 405nm.
7. the endoscope-use light projection unit according to any one of claim 1,3 ~ 6, is characterized in that,
Described wavelength convert mechanism is fluorophor.
8. endoscope-use light projection unit according to claim 2, is characterized in that,
Described wavelength convert mechanism is fluorophor.
9. the endoscope-use light projection unit according to any one of claim 3 ~ 6,8, is characterized in that,
Described scattering component is implant.
10. endoscope-use light projection unit according to claim 1, is characterized in that,
Described scattering component is implant.
11. endoscope-use light projection unit according to claim 2, is characterized in that,
Described scattering component is implant.
12. endoscope-use light projection unit according to claim 7, is characterized in that,
Described scattering component is implant.
13. endoscope-use light projection unit according to claim 9, is characterized in that,
The incorporation rate of described implant is 5%, and the curvature of described concavees lens is 0.3 ~ 0.6.
14. endoscope-use light projection unit according to claim 9, is characterized in that,
The incorporation rate of described implant is 7%, and the curvature of described concavees lens is 0.1 ~ 0.4.
15. endoscope-use light projection unit according to any one of claim 1,3 ~ 6,8,10 ~ 14, is characterized in that,
Described first illumination light is blue laser.
16. endoscope-use light projection unit according to claim 2, is characterized in that,
Described first illumination light is blue laser.
17. endoscope-use light projection unit according to claim 7, is characterized in that,
Described first illumination light is blue laser.
18. endoscope-use light projection unit according to claim 9, is characterized in that,
Described first illumination light is blue laser.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011116834A JP5508339B2 (en) | 2011-05-25 | 2011-05-25 | Endoscopic light projecting unit |
| JP2011-116834 | 2011-05-25 |
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| CN102793525A CN102793525A (en) | 2012-11-28 |
| CN102793525B true CN102793525B (en) | 2016-01-13 |
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| CN201210159819.3A Active CN102793525B (en) | 2011-05-25 | 2012-05-22 | Endoscope-use light projection unit |
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| JP6253231B2 (en) * | 2012-12-27 | 2017-12-27 | オリンパス株式会社 | Subject observation system and method, and capsule endoscope system |
| JP6103966B2 (en) * | 2013-02-07 | 2017-03-29 | オリンパス株式会社 | Lighting device |
| US20160131967A1 (en) * | 2013-06-04 | 2016-05-12 | Nec Display Solutions, Ltd. | Illumination optical system and projector |
| JP2017003711A (en) * | 2015-06-08 | 2017-01-05 | オリンパス株式会社 | Endoscope device and endoscope adapter |
| JP2018183251A (en) * | 2017-04-24 | 2018-11-22 | オリンパス株式会社 | Illumination optical system for endoscope |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101027520A (en) * | 2004-10-01 | 2007-08-29 | 日亚化学工业株式会社 | Light-emitting device |
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| JP2002151778A (en) * | 2000-11-08 | 2002-05-24 | Keyence Corp | Laser oscillator |
| JP2005152366A (en) * | 2003-11-26 | 2005-06-16 | Olympus Corp | Special light observation system |
| JP4317478B2 (en) * | 2004-03-31 | 2009-08-19 | 三菱化学株式会社 | Phosphor-type light emitting device and endoscope device using the same as an illumination source |
| JP4370199B2 (en) * | 2004-05-13 | 2009-11-25 | オリンパス株式会社 | Endoscope device and endoscope adapter |
| JP4925618B2 (en) * | 2004-07-28 | 2012-05-09 | 京セラ株式会社 | Light source device and endoscope provided with the light source device |
| JP4624770B2 (en) * | 2004-12-09 | 2011-02-02 | オリンパス株式会社 | Endoscope device |
| JP4837321B2 (en) * | 2005-07-19 | 2011-12-14 | オリンパス株式会社 | Endoscope device |
| JP2010022700A (en) * | 2008-07-23 | 2010-02-04 | Fujifilm Corp | Endoscope system |
| JP5645385B2 (en) * | 2009-09-29 | 2014-12-24 | 富士フイルム株式会社 | Endoscopic light projecting unit and endoscopic device equipped with the same |
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| CN101027520A (en) * | 2004-10-01 | 2007-08-29 | 日亚化学工业株式会社 | Light-emitting device |
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| JP5508339B2 (en) | 2014-05-28 |
| CN102793525A (en) | 2012-11-28 |
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