CN102793525A - Light projecting unit for endoscope - Google Patents
Light projecting unit for endoscope Download PDFInfo
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- CN102793525A CN102793525A CN2012101598193A CN201210159819A CN102793525A CN 102793525 A CN102793525 A CN 102793525A CN 2012101598193 A CN2012101598193 A CN 2012101598193A CN 201210159819 A CN201210159819 A CN 201210159819A CN 102793525 A CN102793525 A CN 102793525A
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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
The invention discloses a light projecting unit for an endoscope, which prevents the uneven hues when a fluorophor is stimulated by blue light to generate white light, and improves the utilization efficiency of the blue light. A first blue laser having a central wavelength of 445nm performs an incidence toward the fluorophor (50) via a light guiding pipe (24a). In the fluorophor (50), a part of the incident first blue laser is adsorbed by a fluorescent substance to emit fluorescent light, and the part of the first blue laser, which is not adsorbed by the fluorescent substance, generates disffusion via a filler (50a) to enlarge the diffusion angle. The fluorescent light emitted from the fluorophor (50) and the first blue laser perform the incidence into a concave lens (51). The disffusion angle of the first blue laser is further enlarged, thus, the disffusion angle of the first blue laser is consistent with the disffusion angle of the fluorescent light. The combined wave light of the first blue laser and the fluorescent light emitted from the concave lens (51) turns into the white light to irradiate toward the object to be detected.
Description
Technical field
The present invention relates to be arranged on forward end section of endoscope, to the endoscope-use light projector unit of subject irradiating illumination light.
Background technology
In medical field, used the seized intravital diagnosis of endoscope and treatment widely to carry out.Endoscope possesses and is inserted into seized intravital insertion section, from the illuminating window of the leading section that is arranged on this insertion section towards subject irradiating illumination light.And the imaging apparatuss such as CCD of the leading section through being arranged on the insertion section are made a video recording to the subject that has been thrown light on by illumination light, and based on the image pickup signal that obtains through this shooting, on monitor, show endoscopic images.
The white light of xenon lamp (キ セ ノ Application ラ Application プ) or Halogen light (Ha ロ ゲ Application ラ Application プ) etc. is used in seized intravital illumination mostly, but existence such as xenon lamp is more large-scale, and the also big problem of consumes electric power.Relative therewith, in patent documentation 1,, generate white light through the blue light of blue led (Light Emitting Diode) and the ripple that closes of the fluorescence that utilizes this blue light excited fluophor to send.Like this, use blue led and fluorophor to generate white light,, can realize miniaturization and economize electrification thus with respect to xenon lamp etc.
[technical literature formerly]
[patent documentation]
[patent documentation 1] TOHKEMY 2006-61685 communique
Shown in patent documentation 1, when when generating white light, making blue light to fluorophor incident, the blue light of a part is absorbed by fluorophor and sends fluorescence, on the other hand, sees through to the direct straight ahead of remaining blue light.Therefore, from fluorescence and blue light that fluorophor penetrates, the angle of divergence (Wide Ga り angle) is different respectively.Thereby, because of the difference of such angle of divergence, and become white in the colour mixture zone that subject blueing coloured light overlaps with fluorescence, still under the situation in the non-colour mixture zone that these light of formation do not overlap, this non-colour mixture zone becomes the color beyond the white.That is, on subject, produce form and aspect inhomogeneous (color む ら).In the endoscopic images of under producing so uneven state of form and aspect, obtaining, can't carry out correct diagnosis.
As one of method that prevents the uneven generation of form and aspect, consider to have the method for the implant of in fluorophor, sneaking into the blue light scattering that makes the ejaculation of straight ahead ground.Through sneaking into of this implant, the angle of divergence of blue light enlarges, and it is inhomogeneous therefore can to reduce form and aspect, and it is roughly eliminated.Yet,, therefore,, only exist in the fluorophor inscattering and the blue light of no show subject becomes many situation because of the difference of its incorporation rate because implant makes blue light scattering to all the winds.Under these circumstances, the utilization ratio that makes blue light of sneaking into of implant reduces.
Summary of the invention
The object of the present invention is to provide a kind ofly when producing white light, can prevent the uneven generation of form and aspect, and can improve the endoscope-use light projector unit of the utilization ratio of blue light utilizing the blue light excited fluophor.
To achieve these goals; The present invention provides a kind of endoscope-use light projector unit; It is arranged on forward end section of endoscope; Towards subject irradiating illumination light; Unitary being characterised in that of said endoscope-use light projector possesses: the wavelength shifter, and it has the part in first illumination light of provision wavelengths is carried out wavelength conversion and generated the second illumination light wavelength converter section and make the scattering member that is not carried out the first illumination light scattering of wavelength conversion by said wavelength converter section and enlarge its angle of divergence; The angle of divergence enlarges mechanism; The angle of divergence of first illumination light that it will penetrate in said wavelength shifter further enlarges, and this angle of divergence is shone to said subject as said illumination light by first illumination light after further enlarging and the glistening light of waves that closes of second illumination light.
The preferred angle of divergence enlarges mechanism makes the angle of divergence of first illumination light consistent with the angle of divergence of second illumination light.It is concavees lens that the preferred angle of divergence enlarges mechanism.
Preferred first illumination light is the first blue narrow band of light of provision wavelengths; Second illumination light is for carrying out the fluorescence of green～redness that wavelength conversion obtains through the wavelength converter section with the first blue narrow band of light, and concavees lens make the angle of divergence of the first blue narrow band of light consistent with the angle of divergence of fluorescence.The centre wavelength of the preferred first blue narrow band of light is 445nm.
Preferred first illumination light is first and second different blue narrow band of light of centre wavelength each other; Second illumination light is for carrying out the fluorescence of green～redness that wavelength conversion obtains through the wavelength converter section with first and second blue narrow band of light, 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.The centre wavelength of the preferred first blue narrow band of light is 445nm, and the centre wavelength of the second blue narrow band of light is 405nm.
The optimal wavelength shifter is a fluorophor.Preferred scattering member is an implant.Preferred first illumination light is a blue laser.In addition, be that the curvature of preferred concavees lens is 0.3～0.6 under 5% the situation at the incorporation rate of implant, be the curvature of preferred concavees lens is 0.1～0.4 under 7% the situation at the incorporation rate of implant.
[invention effect]
According to the present invention; When the part in first illumination light of provision wavelengths being carried out wavelength conversion and generates second illumination light through the wavelength shifter; The angle of divergence of not carried out first illumination light of wavelength conversion by the wavelength shifter becomes greatly through the scattering member in the wavelength shifter, and enlarges mechanism and further become greatly through penetrate the incident angle of divergence in back from the wavelength shifter.Thus, can make the angle of divergence of first illumination light consistent, therefore can prevent the uneven generation of form and aspect with the angle of divergence of second illumination light.
And in the present invention, the two enlarges the angle of divergence of first illumination light to be divided into interior scattering member of wavelength shifter and angle of divergence expansion mechanism.Therefore; Utilization ratio fermentation from first illumination light; Even only sneak into minimal scattering member at the wavelength shifter; And in the wavelength shifter, can't enlarge mechanism through the angle of divergence afterwards the angle of divergence is further enlarged with the angle of divergence of first illumination light under the abundant condition of enlarged, also can make the angle of divergence of first illumination light consistent thus with the angle of divergence of second illumination light.Thus, can under the state of the utilization ratio that has improved first illumination light, prevent the uneven generation of form and aspect.
Description of drawings
Fig. 1 is the figure of the endoscopic system of expression first embodiment.
Fig. 2 is the figure in cross section of the leading section of expression fujinon electronic video endoscope.
Fig. 3 is the figure of front end face of the leading section of expression fujinon electronic video endoscope.
Fig. 4 is the chart of relation of utilization ratio and the implant incorporation rate of expression first blue laser.
Fig. 5 is first blue laser and the angle of divergence of fluorescence and the relation of light intensity after expression is penetrated from fluorophor, and the figure of the irradiation area of first blue laser and the fluorescence of expression after this fluorophor ejaculation when shining on the subject.
Fig. 6 is first blue laser and the angle of divergence of fluorescence and the relation of light intensity after expression is penetrated from concavees lens, and the figure of the irradiation area of first blue laser and the fluorescence of expression after this fluorophor ejaculation when shining on the subject.
Fig. 7 is the figure of the endoscopic system of expression second embodiment.
Fig. 8 is first, second blue laser and the angle of divergence of fluorescence and the relation of light intensity after expression is penetrated from fluorophor, and the figure of the irradiation area of first, second blue laser and the fluorescence of expression after this fluorophor ejaculation when shining on the subject.
Fig. 9 is first, second blue laser and the angle of divergence of fluorescence and the relation of light intensity after expression is penetrated from concavees lens, and the figure of the irradiation area of first, second blue laser and the fluorescence of expression after this fluorophor ejaculation when shining on the subject.
Figure 10 is used to explain that fluorescent material possesses the figure that makes the luminous function of fluorescence excitation and these two functions of light diffusion function.
Figure 11 is the figure that is used to explain the assay method of light quantity distribution.
Figure 12 is the unitary figure of light projector that uses among expression embodiment 1-1, the 1-2.
Figure 13 is the chart of relation of difference and the implant incorporation rate of expression half value fabric width.
Figure 14 is the figure that is used to explain the half value fabric width.
Figure 15 is that expression implant incorporation rate is the chart of relation of curvature of difference and concavees lens of 5% o'clock half value fabric width.
Figure 16 is that expression implant incorporation rate is the chart of relation of curvature of difference and concavees lens of 7% o'clock half value fabric width.
Figure 17 is the unitary figure of light projector that uses among expression embodiment 2-1, the 2-2.
Figure 18 is the chart of relation of difference and the implant incorporation rate of expression half value fabric width.
Figure 19 is that expression implant incorporation rate is the chart of relation of curvature of difference and concavees lens of 7% o'clock half value fabric width.
Figure 20 is that expression implant incorporation rate is the chart of relation of curvature of difference and concavees lens of 5% o'clock half value fabric width.
Figure 21 is the unitary figure of light projector that uses in the expression comparative example 1.
Figure 22 is the unitary figure of light projector that uses in the expression comparative example 2.
Figure 23 is the unitary figure of light projector that uses in the expression comparative example 3.
[symbol description]
38 first light projector unit
39 second light projector unit
50 fluorophor
The 50a implant
51 concavees lens
The specific embodiment
As shown in Figure 1, the endoscopic system 2 of first embodiment possesses: the fujinon electronic video endoscope 10 of taking subject; Generate the blood processor 12 of endoscopic images; Be arranged in this blood processor 12, supply with the light supply apparatus 13 of the illumination light that subject is thrown light on; The monitor 14 that shows endoscopic images; And send water tank 16 to what be sent to that seized intravital water accumulates.
Fujinon electronic video endoscope 10 comprises: the endoceliac insertion section 20 that is inserted into the patient; Partly be connected with the operating portion 22 that the people who supplies doctor or technician etc. to perform an operation operates through handle with the cardinal extremity of insertion section 20; General flexible cord 24 from operating portion 22 extensions.Insertion section 20 is made up of leading section 26, bending section 27 and flexible curved tube portion 28 from front end in order.Leading section 26 is formed by the resin material of hard.Flexible curved tube portion 28 forms thin footpath and rectangular tubulose, and has flexiblely, and operating portion 22 is connected with bending section 27.
Bending section 27 constitute according to be provided with on the operating portion 22 up and down with operation knob 30 and about with the rotary manipulation of operation knob 31 to bending right and left up and down.When to being rotated when operation with operation knob 30 up and down, bending section 27 is crooked to above-below direction, when to about when being rotated operation with operation knob 31, bending section 27 direction bending to the left and right.
On general flexible cord 24, be provided with adapter 36, when being taken into the light supplied with from blood processor 12 and air, this adapter 36 is used for the transmission of power supply or various control signals.Fujinon electronic video endoscope 10 is connected with blood processor 12 via adapter 36 mounting or dismounting freely.
Light supply apparatus 13 possesses the first LASER Light Source 13a that the centre wavelength sent is first blue laser of 445nm.First blue laser that sends from the first LASER Light Source 13a is via the light guide 24a in the general flexible cord 24,24b and by the leading section 26 of leaded light to fujinon electronic video endoscope.The fluorophor 50 that is set at leading section 26 by the part of first blue laser of leaded light absorbs, thereby makes the fluorescence excitation of green～redness luminous, and first blue laser that is not absorbed by fluorophor directly sees through fluorophor.Thus, the white light that first blue laser and fluorescence is mixed to subject irradiation from leading section 26.Take by the imaging apparatuss 42 (with reference to Fig. 3) in the fujinon electronic video endoscope 10 and as the picture of subject from the back light of subject.In addition, light guide 24a, 24b are made up of light conducting members such as optical fiber.
As shown in Figure 2, be provided with at the leading section 26 of fujinon electronic video endoscope: be used for first and second light projector unit 38,39 towards two lamps of subject irradiating illumination light; And through 42 pairs of image units 43 that taken by the picture of the subject of light via observation window 40 and imaging lens system 41 of imaging apparatuss such as CCD.
As shown in Figure 3, first and second light projector unit 38,39 is arranged on about image unit 43 symmetrical positions at the front end face 26a of leading section 26.In addition;, except first and second light projector unit 38,39, image unit 43, also be provided with the disposal apparatus that grabber disposal apparatus such as (ス ネ ア) is exposed and export 46, clean the air of usefulness or the delivery nozzle 48 of supplying gas of water at leading section 26 towards observation window 40 ejections.
As shown in Figure 2, the first light projector unit 38 possesses: fluorophor 50, and it will be absorbed by the part of first blue laser of light guide 24a leaded light and send the fluorescence of green～redness, and unabsorbed light is directly seen through; Concavees lens 51, it possesses the angle of divergence expanded functionality that the angle of divergence with first blue laser that penetrates from fluorophor 50 enlarges, and has the function that makes the illuminating window that first blue laser that enlarges after this angle of divergence and fluorescence penetrates towards subject.At this, fluorophor 50 is a kind of mode of wavelength shifter, and concavees lens 51 enlarge a kind of mode of mechanism for the angle of divergence.
In this first light projector unit 38, fluorophor 50 is kept by lock pin 55 with the state that is connected optically each other with light guide 24a.Lock pin 55 is the cylinder element of hollow, and light guide 24a passes in the through hole 55a that extends vertically.In addition, in the lock pin 55, through bonding agent 56 that fluorophor 50 is fixing in front has the roughly cylindric or rectangular-shaped front end incorporating section 55b of peristome.
This lock pin 55 is kept by sleeve 60 with concavees lens 51.This sleeve 60 keeps lock pin 55 and concavees lens 51 with the state that the plane of incidence of concavees lens 51 is faced mutually with the exit facet of fluorophor 50.
Fluorophor 50 forms through mixing with covering members such as unorganic glasses with fluorescent material with as the implant 50a of a mode of scattering member; Wherein, Fluorescent material absorbs the part of blue laser and sends fluorescence, and implant makes the blue laser scattering that is not absorbed by this fluorescent material.Fluorescent material is so long as can be got final product qualification especially, but preferred the use by the material that first blue laser excites
A kind of in following (i)～(xi) or two kinds of combinations are 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 one ト),
(viii) germanate (ゲ Le マ ン Suan salt),
(ix) the terres rares aluminate,
(x) terres rares silicate,
(xi) mainly through group of the lanthanides (ラ Application タ ノ イ De system) element activation such as Eu organic and organic complex
In addition, also can replace fluorescent material, and (for example ， perylene fluorescent dyes such as (ペ リ レ Application)) such as use pigment.
As filler 50a, cited with silica (fumed silica (U a Rousseau Hiroshi Shin Rika), precipitated silica (precipitated Shin Rika), fused silica, crystalline silica (crystalline Shin Rika), ultrafine amorphous silica, silicic anhydride (Gui anhydrous acid), etc.), quartz, titanium oxide, tin oxide, zinc oxide, tin oxide, calcium oxide, magnesium oxide, beryllium oxide, aluminum oxide, boron nitride, silicon nitride, aluminum and other metal nitrides, SiC and other metallic carbides, calcium carbonate, potassium carbonate, sodium carbonate, magnesium carbonate, barium carbonate and other metal carbonates, aluminum hydroxide, magnesium hydroxide and other metal hydroxides, aluminum borate (Mizuho elephant acid ア Hikaru irregularity mini ウ), barium titanate, calcium phosphate, calcium silicate, clay (CLEA), the gypsum, barium sulfate, mica, diatomaceous earth (Kelly イ ソ ウ earth), clay (china clay), inorganic balls (inorganic van Hikaru an nn), talc ( Tatari Hikaru Kelly), lithopone (re Suites pop), zeolite (athlete LITE Io), halloysite (ro イ thermal イ tension strike), a fluorescent substance, a metal sheet (silver, etc.).In addition, in order to obtain intensity, can also use acicular implants such as potassium titanate, barium silicate, fibre glass.Wherein, preferred Barium metatitanate., titanium oxide, aluminium oxide, silicon oxide etc.
Utilize the difference of implant 50a, can adjust the angle of divergence of first blue laser that penetrates from fluorophor 50 to the incorporation rate of fluorophor 50.Usually and since the angle of divergence of short wavelength's first blue laser than in～angle of divergence of long wavelength's fluorescence is little, therefore enlarge the angle of divergence of first blue laser, thereby realize the uneven elimination of form and aspect through the incorporation rate that increases implant 50a.Yet, under the situation of the incorporation rate that has improved implant 50a, only in fluorophor 50 inscatterings and first blue laser of no show subject becomes many.This becomes therefore former that the utilization ratio that makes blue laser reduces
For example; The ratio (Ib/Ia * 100 (%)) of the light quantity Ib of the blue laser of actual arrival subject is as utilization ratio among the light quantity Ia of first blue laser that will send from the first LASER Light Source 13a; And under the situation of containing ratio as the implant incorporation rate with the implant 50a that occupies in the fluorophor 50, the relation of utilization ratio and implant incorporation rate is as shown in Figure 4.According to this Fig. 4, utilization ratio reduces along with the increase of implant incorporation rate, and when the implant incorporation rate became 10%, utilization ratio was 50%, that is, only half is used in the illumination of subject from first blue laser that the first LASER Light Source 13a sends in expression.
Therefore, for the angle of divergence of expansion first blue laser under the situation of the utilization ratio that does not reduce by first blue laser, and make from the further concavees lens 51 that enlarge of the angle of divergence of first blue laser of fluorophor 50 ejaculations.For example, for utilization ratio is remained fixing above and only bottom line sneak under the situation of implant 50a, as shown in Figure 5, the fully expansion of the angle of divergence of first blue laser after penetrating from fluorophor 50.Therefore, the field of illumination on subject produces the non-colour mixture region R 1 that first blue laser does not overlap with fluorescence.
The angle of divergence of first blue laser that can't fully be enlarged by this implant 50a is further enlarged by concavees lens 51.On the other hand, though first blue laser and fluorescence all to concavees lens 51 incidents because fluorescence is big than first blue laser wavelengths, therefore according to Si Nieer (ス ネ Le) law, the angle of divergence of fluorescence is not as the blue light that kind.Therefore, as shown in Figure 6, through concavees lens 51, can the angle of divergence of first blue laser be expanded to the angle of divergence of fluorescence.Thus, the non-colour mixture region R 1 (with reference to Fig. 5) that first blue laser does not overlap with fluorescence portion disappears, and therefore can prevent the uneven generation of form and aspect.
In addition, preferred concavees lens 51 have the refracting power (refracting power) (focal power (power)) of the angle of divergence that can make first blue laser that penetrates from fluorophor 50 degree consistent with the angle of divergence of fluorescence.Therefore,, increase refracting power, when the angle of divergence of first blue laser that penetrates is big, reduce refracting power in the angle of divergence of first blue laser that penetrates from fluorophor 50 hour.
The second light projector unit 39 possesses fluorophor 50, concavees lens 51, lock pin 55 and the sleeve 60 same with the first light projector unit 38.In addition, configuration of each member of the second light projector unit 39 etc. is same with the first light projector unit 38.Therefore, omit detailed explanation.
As shown in Figure 7; In the endoscopic system 100 of second embodiment; The new setting sent the second LASER Light Source 13b that centre wavelength is second blue laser of 405nm in light supply apparatus 13, through the centre wavelength of sending from the first LASER Light Source 13a be 445nm first blue laser and from the centre wavelength that the second LASER Light Source 13b sends be 405nm second blue laser the two make phosphor excitation.In addition, same with first embodiment in addition, therefore omit detailed explanation.
In the endoscopic system 100 of second embodiment; Second blue laser that sends from the second LASER Light Source 13b closes ripple with first blue laser that sends from the first LASER Light Source 13a by synthesizer 101, this close light behind the ripple by light guide 24a, 24b leaded light to fluorophor 50.And; Close the glistening light of waves to fluorophor 50 incidents through first and second blue laser; The part of first and second blue laser is absorbed by the fluorescent material of fluorophor 50 and sends fluorescence, and remaining first and second blue laser through the implant 50a in the fluorophor 50 scattering takes place.
Same with first embodiment, for fear of the reduction of the utilization ratio of first and second blue laser, implant 50a only is blended in the fluorophor to Min..Therefore, as shown in Figure 8, though the scattering of the angle of divergence of first and second blue laser through implant 50a enlarges, do not expand the angle of divergence of fluorescence to.Therefore, form the non-colour mixture region R 2 that fluorescence does not overlap with first and second blue laser.
First and second blue laser that in fluorophor 50, penetrates and fluorescence are to concavees lens 51 incidents.Through these concavees lens 51, with the angle of divergence expansion of first and second blue laser, thereby 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, non-colour mixture region R 2 (with reference to Fig. 8) disappears, and it is inhomogeneous can not to produce form and aspect.First and second blue laser that in concavees lens 51, penetrates and fluorescence become white light and shine to subject.
In addition, in second embodiment, also preferred concavees lens 51 have the refracting power (focal power) of the angle of divergence that can make first and second blue laser that penetrates from fluorophor 50 degree consistent with the angle of divergence of fluorescence.Because centre wavelength is that second blue laser of 405nm is the first blue laser short wavelength of 445nm than centre wavelength, therefore refractive index uprises in concavees lens 51.Thereby concavees lens 51 need to decide refracting power according to the angle of divergence of first and second blue laser that penetrates from fluorophor 50, and the wavelength difference that needs to consider first and second blue laser decides refracting power.
In addition; In first and second embodiment,, make from the angle of divergence expansion of the emergent light of fluorophor ejaculation through in fluorophor, sneaking into implant; But also can not sneak into implant, and only the light that fluorescent material had through fluorophor enlarges the angle of divergence.For example; When under the situation of first embodiment; Then shown in figure 10; In fluorophor 50, green light uses fluorescent material 80 not only to make green fluorescence excitation luminous through centre wavelength as first blue laser of 445nm, but also makes through glowing with the fluorescent scattering of the redness of fluorescent material 81 stimulated luminescences.Equally, glowing not only makes red fluorescence excitation luminous through first blue laser with fluorescent material 81, but also makes through the fluorescent scattering of green light with the green of fluorescent material 80 stimulated luminescences.Like this, through producing the light diffusion function that each fluorescent material 80,81 is had, under the situation of not sneaking into implant 50a, also can enlarge from the angle of divergence of the emergent light of fluorophor 50 ejaculations.
In addition; When under the situation of second embodiment; First blue laser and be about 10% being absorbed by fluorescent material and to send fluorescence of second blue laser of 405nm to the incident centre wavelength of fluorophor; On the other hand, about 90% second blue laser that is not absorbed by fluorescent material spreads through other fluorescent material.Therefore, in second embodiment,, under the situation of not sneaking into implant 50a, the angle of divergence of second blue laser is enlarged through adjusting green light and glowing with the incorporation rate of fluorescent material.
In addition, for the assay method of the light quantity distribution of fluorescence, blue laser, carry out like this below preferred.Shown in figure 11; To be arranged on the center as first (or second) light projector unit 38 of light source; With orthogonal of the optical axis L of this light projector unit 90 in and leave first of fixed range from the irradiation center C and locate, carry out the mensuration of light quantity through actinometry device 90.The actinometry value at this first place of locating is the light intensity at 90 ° at luminous intensity distribution (luminous intensity distribution) angle.Then, actinometry device 90 moved to locate along circumferentially leaving second of fixed angle A from first locate, carry out the mensuration of light quantity.The actinometry value at this second place of locating is the light intensity at luminous intensity distribution angle (90-A) °.Equally, every at a distance from the fixed angle actinometry device that staggers, and obtain the light intensity at luminous intensity distribution angle simultaneously.Thus, obtain luminous intensity distribution angle+90 °～-90 ° of light quantity distribution of locating (for example Fig. 5 etc.).
[embodiment]
Through following embodiment 1-1～2-2 and comparative example 1～3, the present invention is further explained particularly.
[embodiment 1-1]
In embodiment 1-1, the leading section of fujinon electronic video endoscope 10 be provided with the first light projector unit 38 shown in Figure 12 and with the same second light projector unit 39, this first light projector unit 38 the two.The first light projector unit 38 is connected with the first LASER Light Source 13a through light guide 24a optically, and making centre wavelength via this light guide 24a is the first blue laser incident of 445nm.In the first light projector unit 38, make first blue laser from light guide 24a to fluorophor 50 incidents.In fluorophor 50, the part of first blue laser is sent the fluorescence of 500nm～700nm by the fluorescent material absorption, on the other hand, make the remaining first blue laser scattering make its angle of divergence become big through implant 50a.The incorporation rate of implant 50a is 5%.First blue laser and fluorescence are that the exit facet of the fluorophor 50 of 0.9mm penetrates from diameter.First blue laser that in fluorophor 50, penetrates and fluorescence are to concavees lens 51 incidents.Through these concavees lens 51 angle of divergence of first blue laser is further enlarged.First blue laser that in concavees lens 51, penetrates and fluorescence become white light and shine to subject.In addition, from the second light projector unit 39 too, first blue laser after will the angle of divergence being enlarged through implant and concavees lens and fluorescence become white light and shine to subject.
In this embodiment 1-1, the difference of obtaining the half value fabric width of the fluorescence and first blue laser through simulation is the curvature of the concavees lens 51 below 3.5 °.In addition, shown in figure 13 under the situation of not using concavees lens 51, when the implant incorporation rate was 10%, the difference of the half value fabric width of first blue laser and the half value fabric width of fluorescence was 3.5 °.If this degree is poor, it is inhomogeneous then not produce form and aspect substantially.Therefore, shown in embodiment 1-1, be under 5% the situation at the implant incorporation rate, it is below 3.5 ° that the focal power through concavees lens 51 makes the half value fabric width, it is inhomogeneous to eliminate form and aspect thus.In addition, shown in figure 14, " half value fabric width " is meant that light intensity becomes the width at 50% o'clock luminous intensity distribution angle.
In addition, when simulating, the thickness T of concavees lens is set at 0.2mm, effective diameter is set at 1.5mm, will be set at 1.9079, will be set at 1.8817 the refractive index of fluorescence to the refractive index of first blue laser.
Simulation result is shown in figure 15, increases curvature more, and the difference of half value fabric width diminishes more.When curvature surpassed 0.4, the difference of half value fabric width became below 3.5 °, and when curvature became 0.6, the difference of half value fabric width was about 2.5 °.Therefore, in embodiment 1-1, using curvature is 0.6 concavees lens 51.
[embodiment 1-2]
The incorporation rate of implant 50a is 7%, and under this implant incorporation rate, the difference of obtaining the half value fabric width of the fluorescence and first blue laser through simulation becomes the curvature of the concavees lens below 3.5 °.In addition, likewise implement with embodiment 1-1.
Simulation result is shown in figure 16, though be the border with curvature 0.3, and the increase and decrease of the difference of half value fabric width is between 0.1～0.4 in curvature, it is below 3.5 ° that the difference of half value fabric width is suppressed.Therefore, in embodiment 1-2, use the concavees lens 51 of the fixed value between 0.1～0.4 as curvature.
[embodiment 2-1]
Shown in figure 17; Except centre wavelength is first blue laser of 445nm; Also making centre wavelength is that second blue laser of 405nm is to fluorophor 50 incidents, in the concavees lens with following lens data 51, except enlarging the angle of divergence of first and second blue laser; And the incorporation rate that makes implant is beyond 7%, likewise implements with embodiment 1-1.In addition, in embodiment 2-1, first blue laser that sends from the first LASER Light Source 13a and close ripple from second blue laser that the second LASER Light Source 13b sends by synthesizer 101 after, to light guide 24a incident.
In this embodiment 2-1, the difference D (| Δ θ 1-Δ θ 2|) of difference Δ θ 2 of half value fabric width of difference Δ θ 1 and the fluorescence and second blue laser that obtains the half value fabric width of the fluorescence and first blue laser through simulation becomes the curvature of minimum concavees lens 51.In addition, under the situation of not using concavees lens 51, D is shown in figure 18 for the residual quantity value, is 10% o'clock minimum (residual quantity value D is about 2 °) at the implant incorporation rate, and it is inhomogeneous that roughly do not produce form and aspect this moment.Therefore, obtain the curvature that residual quantity value D becomes the concavees lens 51 below 2 °.In addition, when simulating, making the refractive index to second blue laser is 1.9207, and parameter in addition (thickness T, effective diameter, to the refractive index of first blue laser, to the refractive index of fluorescence) is same with embodiment 1-1.
Simulation result is shown in figure 19, and when curvature 0.1, residual quantity value D becomes " 0 ".Therefore, in embodiment 2-2, use curvature is 0.1 concavees lens 51.
[embodiment 2-2]
The incorporation rate of implant 50a is 5%, under the incorporation rate of this implant, obtains the curvature that residual quantity value D becomes the concavees lens 51 below 2 ° through simulation.Likewise implement with embodiment 2-1 in addition.
Simulation result is shown in figure 20, is between 0.3～0.4 in curvature, and residual quantity value D is below 2 °.Therefore, in embodiment 2-2, use the concavees lens 51 of the fixed value between 0.3～0.4 as curvature.
[comparative example 1]
Shown in figure 21, the illuminating window 52 that does not have refracting power is set in first and second light projector unit 38,39, only enlarge the angle of divergence of first blue laser through implant 50a.The incorporation rate of implant 50a is bigger than embodiment 1-1.Likewise implement with embodiment 1-1 in addition.
[comparative example 2]
Shown in figure 22, do not have the illuminating window 52 of refracting power except on first and second light projector unit 38,39, being provided with, likewise implement with embodiment 1-1.
[comparative example 3]
Shown in figure 23, do not have the illuminating window 52 of refracting power except on first and second light projector unit 38,39, being provided with, likewise implement with embodiment 2-1.
[result]
In embodiment 1-1～2-2; Through implant 50a is used with concavees lens 51; Can be under not reducing as the situation of utilization ratio of the blue laser (being first blue laser in embodiment 1-1,1-2, is first and second blue laser in embodiment 2-1,2-2) of having encouraged light the elimination form and aspect inhomogeneous.Relative therewith, in comparative example 1,, can realize the uneven elimination of form and aspect, and on the other hand, it is many that the light of no show subject becomes through improving the incorporation rate of implant 50a, the utilization ratio of first blue laser reduces.In addition, in comparative example 2, because the angle of divergence of first blue laser is narrower than the angle of divergence of fluorescence, it is inhomogeneous therefore to produce form and aspect.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, it is inhomogeneous therefore also to produce form and aspect.
Claims (18)
1. endoscope-use light projector unit, it is arranged on forward end section of endoscope, and towards subject irradiating illumination light, unitary being characterised in that of said endoscope-use light projector possesses:
The wavelength shifter, it has the part of first illumination light of provision wavelengths is carried out wavelength conversion and generated the second illumination light wavelength converter section and make the scattering member that is not carried out the first illumination light scattering of wavelength conversion by said wavelength converter section and enlarge its angle of divergence;
The angle of divergence enlarges mechanism; The angle of divergence of first illumination light that it will penetrate in said wavelength shifter further enlarges, and this angle of divergence is shone to said subject as said illumination light by first illumination light after further enlarging and the glistening light of waves that closes of second illumination light.
2. endoscope-use light projector according to claim 1 unit is characterized in that,
The said angle of divergence enlarges mechanism makes the angle of divergence of said first illumination light consistent with the angle of divergence of said second illumination light.
3. endoscope-use light projector according to claim 1 and 2 unit is characterized in that,
It is concavees lens that the said angle of divergence enlarges mechanism.
4. endoscope-use light projector according to claim 3 unit is characterized in that,
Said first illumination light is the first blue narrow band of light of provision wavelengths, and said second illumination light is for carrying out the fluorescence of green～redness that wavelength conversion obtains through said wavelength converter section to the said first blue narrow band of light,
Said concavees lens make the angle of divergence of the said first blue narrow band of light consistent with the angle of divergence of said fluorescence.
5. endoscope-use light projector according to claim 4 unit is characterized in that,
The centre wavelength of the said first blue narrow band of light is 445nm.
6. endoscope-use light projector according to claim 3 unit is characterized in that,
Said first illumination light is first and second different blue narrow band of light of centre wavelength each other, and said second illumination light is for carrying out the fluorescence of green～redness that the wavelength conversion obtains through the wavelength converter section with said first and second blue narrow band of light,
Said concavees lens make the angle of divergence of said first and second blue narrow band of light consistent with the angle of divergence of said fluorescence.
7. endoscope-use light projector according to claim 6 unit is characterized in that,
The centre wavelength of the said first blue narrow band of light is 445nm, and the centre wavelength of the said second blue narrow band of light is 405nm.
8. according to each described endoscope-use light projector unit in the claim 1,2,4～7, it is characterized in that,
Said wavelength shifter is a fluorophor.
9. endoscope-use light projector according to claim 3 unit is characterized in that,
Said wavelength shifter is a fluorophor.
10. according to each described endoscope-use light projector unit in the claim 1,2,4～7,9, it is characterized in that,
Said scattering member is an implant.
11. endoscope-use light projector according to claim 3 unit is characterized in that,
Said scattering member is an implant.
12. endoscope-use light projector according to claim 8 unit is characterized in that,
Said scattering member is an implant.
13. endoscope-use light projector according to claim 10 unit is characterized in that,
The incorporation rate of said implant is 5%, and the curvature of said concavees lens is 0.3～0.6.
14. endoscope-use light projector according to claim 10 unit is characterized in that,
The incorporation rate of said implant is 7%, and the curvature of said concavees lens is 0.1～0.4.
15. according to each described endoscope-use light projector unit in the claim 1,2,4～7,9,11～14, it is characterized in that,
Said first illumination light is a blue laser.
16. endoscope-use light projector according to claim 3 unit is characterized in that,
Said first illumination light is a blue laser.
17. endoscope-use light projector according to claim 8 unit is characterized in that,
Said first illumination light is a blue laser.
18. endoscope-use light projector according to claim 10 unit is characterized in that,
Said first illumination light is a 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 |
Publications (2)
| Publication Number | Publication Date |
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| CN102793525A true CN102793525A (en) | 2012-11-28 |
| CN102793525B CN102793525B (en) | 2016-01-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210159819.3A Active CN102793525B (en) | 2011-05-25 | 2012-05-22 | Endoscope-use light projection unit |
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| JP (1) | JP5508339B2 (en) |
| CN (1) | CN102793525B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105264437A (en) * | 2013-06-04 | 2016-01-20 | Nec显示器解决方案株式会社 | Illumination optical system and projector |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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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| JP2002151778A (en) * | 2000-11-08 | 2002-05-24 | Keyence Corp | Laser oscillator |
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| 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 |
| JP2010022700A (en) * | 2008-07-23 | 2010-02-04 | Fujifilm Corp | Endoscope system |
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- 2011-05-25 JP JP2011116834A patent/JP5508339B2/en not_active Expired - Fee Related
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| JP2005152366A (en) * | 2003-11-26 | 2005-06-16 | Olympus Corp | Special light observation system |
| JP2005323737A (en) * | 2004-05-13 | 2005-11-24 | Olympus Corp | Endoscope device |
| 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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| CN105264437A (en) * | 2013-06-04 | 2016-01-20 | Nec显示器解决方案株式会社 | Illumination optical system and projector |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2012245042A (en) | 2012-12-13 |
| JP5508339B2 (en) | 2014-05-28 |
| CN102793525B (en) | 2016-01-13 |
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