CN102429622A - Electronic endoscope system - Google Patents
Electronic endoscope system Download PDFInfo
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- CN102429622A CN102429622A CN2011102493654A CN201110249365A CN102429622A CN 102429622 A CN102429622 A CN 102429622A CN 2011102493654 A CN2011102493654 A CN 2011102493654A CN 201110249365 A CN201110249365 A CN 201110249365A CN 102429622 A CN102429622 A CN 102429622A
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Abstract
The invention provides an electronic endoscope system, wherein even under the long-range observation mode with insufficient light amount, the observation on special light is not affected at all so as to obtain an image of sufficient brightness. Under the long-range observation mode, a second blue narrow-band-domain light (Bn2) and a second green narrow-band-domain light (Gn2) are irradiated in a cavity for shooting purpose. Compared with a first blue narrow-band-domain light, the second blue narrow-band-domain light (Bn2) is greater in half-value width under the close-range observation mode. Compared with a first green narrow-band-domain light (Gn1), the second green narrow-band-domain light (Bn2) is greater in half-value width under the close-range observation mode.
Description
Technical field
The present invention relates to possess the electronic endoscope system of the special light overview function of stressing demonstration top layer blood vessel.
Background technology
At medical field in recent years, use the diagnosis of fujinon electronic video endoscope and treatment to popularize.Fujinon electronic video endoscope possesses the endoceliac elongated insertion section of inserting the examinee, and is built-in with imaging apparatuss such as CCD at the leading section of this insertion section.In addition, on fujinon electronic video endoscope, be connected with light supply apparatus and processor device.Shine to endoceliac look-out station from the illumination light of light supply apparatus illuminating window from the leading section of being located at fujinon electronic video endoscope.From the shooting window of the reflected light of the look-out station leading section through being located at fujinon electronic video endoscope to CCD incident.The image of being taken by this CCD is admitted to processor device, after treatment circuit has been implemented various Flame Image Process, shows at monitor.Therefore, through using fujinon electronic video endoscope, therefore endoceliac image that can the real-time confirmation examinee, can be diagnosed and treated aptly.
Light supply apparatus use can send from the blue ribbon territory (blue wavelength territory) to the red zone territory white light source, the for example xenon lamp of the wide band light of the white in (red wavelength territory).Through using white wide band light as illumination light, can comprehensive observing irradiated body tissue (objective tissue).Can roughly observe the irradiated body tissue from irradiation resulting photographed images of wide band light time, but the irradiated body tissues such as sag and swell of capillary vessel, pit pattern (gland outlet structure), depression or protuberance and so on are difficult to observe clearly.
As known,, can capillary vessel etc. be observed emphatically clearly through wavelength being limited in territory, the arrowband light in specific band territory for this irradiated body irradiated tissue.On the other hand, because to the half breadth constriction of the light of irradiated body irradiated tissue, so the light quantity of illumination light reduces.Consequently, endoceliac illumination is insufficient, can not carry out good shooting.
In No. 4009626 communique of japanese, implement to be used for the Flame Image Process of deficiency in light quantity compensation for resulting image pickup signal of irradiation territory, arrowband light time.Thus, even the irradiation of light and making under the situation dark in the body cavity in the territory, arrowband, the image quality of the reflection that is shown by monitor can not reduce yet.
But as known, even under the situation of irradiation territory, arrowband light, when forward end section of endoscope is observed near the irradiated body tissue, when so-called close shot is observed, the light quantity of territory, arrowband light also can be sufficient, can fully stress top layer blood vessel etc.Relative with it, when making endoscope distal end portion carry out the distant view observation away from the irradiated body tissue, when so-called distant view is observed, because the deficiency in light quantity of territory, arrowband light, so can not fully stress top layer blood vessel etc. sometimes.
For this opinion, do not put down in writing or hint in No. 4009626 communique of japanese, therefore, no matter distant view is observed still is arbitrary situation that close shot is observed, and all image pickup signal is used for the Flame Image Process of deficiency in light quantity compensation.Therefore, when the distant view that becomes deficiency in light quantity was observed, the Flame Image Process of putting down in writing in No. 4009626 communique of japanese that is used for the deficiency in light quantity compensation was useful.But when close shot was observed, more abundant stressing showed top layer blood vessel etc., and it is bright more, and therefore, when being used for replenishing the Flame Image Process of deficiency in light quantity, the reflection on the monitor is too bright, and the anxiety that is difficult on the contrary observe exists.
Summary of the invention
The objective of the invention is to, shine the electronic endoscope system that special plain edge carries out also can obtaining under the situation that distant view observes the reflection that enough becomes clear on the limit even provide a kind of.
For realizing above-mentioned purpose, other purpose, electronic endoscope system of the present invention possesses wide band light source, first rotary filter, imaging apparatus, observation state decision maker, video camera controller.Said wide band light source produces and comprises the wide band light from the blue ribbon territory to the red zone territory.Said first rotary filter with mode that first arrowband territory light and territory, second arrowband light are alternately shone in body cavity along a plurality of first arrowband of Zhou Fangxiang alternate configurations territory light transmission light filter and territory, a plurality of second arrowband light transmission light filter.Said each territory, first arrowband light transmission light filter makes territory, first arrowband light transmission in the said wide band light.Territory, second arrowband light transmission that said each territory, second arrowband light transmission light filter makes the half breadth with territory, said first arrowband light enlarge with certain limit.Said imaging apparatus is disposed at the endoscope distal end portion that in said body cavity, inserts, and said endoceliac irradiated body tissue is taken, and produces image pickup signal.Said observation state decision maker judges it is that distance at said endoscope distal end portion and said irradiated body tissue is that the close shot observation state of near state is taken or is shooting under the distant view observation state of state far away in the distance of said endoscope distal end portion and said irradiated body tissue based on said image pickup signal.Said video camera controller is controlled said imaging apparatus as follows; That is, when being judged to be said close shot observation state, take in irradiation said first arrowband territory light time; When being judged to be said distant view observation state, take in irradiation said second arrowband territory light time.
Preferably, territory, said first arrowband light comprises the first blue arrowband territory light in the specific band territory that is restricted in the said blue ribbon territory and is restricted to green territory, the first green arrowband light of being with the specific band territory in the territory.Preferably, territory, said second arrowband light comprises the half breadth of territory, said first blue arrowband light with the second blue arrowband territory light of certain expanded range with the half breadth of territory, said first green arrowband light territory, the second green arrowband light with certain expanded range.
Territory, said a plurality of first arrowband light transmission light filter is territory, the first green arrowband light transmission light filter that makes the first blue arrowband territory light transmission light filter of territory, said first blue arrowband light transmission and make territory, said first green arrowband light transmission.In addition, territory, said a plurality of second arrowband light transmission light filter is territory, the second green arrowband light transmission light filter that makes the second blue arrowband territory light transmission light filter of territory, said second blue arrowband light transmission and make territory, said second green arrowband light transmission.
Said first rotary filter has first filter areas and is disposed at second filter areas in its inboard or the outside.The blue light that said first filter areas is provided with the B light transmission that makes said blue ribbon territory in order sees through light filter, makes the green light of the G light transmission in said green band territory see through light filter and make the red light of the R light transmission in said red zone territory see through light filter.Said second filter areas is provided with territory, said first blue arrowband light transmission light filter, territory, said second blue arrowband light transmission light filter, territory, said first green arrowband light transmission light filter, reaches territory, said second green arrowband light transmission light filter along Zhou Fangxiang in order.
Under the situation of carrying out the normal light observation, on the light path of said wide band, settle said first filter areas, through making said first rotary filter rotation, said B light, said G light, said R light are shone in said body cavity in order.Under the situation of carrying out the special light observation; On the light path of said wide band light, settle said second filter areas; Through making said first rotary filter rotation, territory, said first blue arrowband light, territory, said second blue arrowband light, territory, said first green arrowband light, territory, said second green arrowband light are shone in said body cavity in order.
Also can use first rotary filter and second rotary filter.On said first rotary filter, be provided with territory, said first blue arrowband light transmission light filter, territory, said second blue arrowband light transmission light filter, territory, said first green arrowband light transmission light filter, territory, the said second green arrowband through light filter.The peristome that the blue light that on said second rotary filter, is provided with the B light transmission that makes said blue ribbon territory sees through light filter, make the green light of the G light transmission in said green band territory see through light filter, make the red light of the R light transmission in said red zone territory see through light filter, said wide band light is directly seen through.
Under the situation of carrying out the normal light observation; Under the state that said first rotary filter is kept out of the way from the light path of said wide band light; Make said second rotary filter rotation, thus, said B light, said G light, said R light are shone in said body cavity in order.Under the situation of carrying out the special light observation; Under the state of the peristome of settling said second rotary filter on the light path of said wide band light; Make said first rotary filter rotation; Thus, territory, said first blue arrowband light, the said second blue herring bone city light, territory, said first green arrowband light, territory, said second green arrowband light are shone in said body cavity in order.
Preferably, said observation state detection unit detects light exposure according to said image pickup signal, is to be judged to be the close shot observation state under the situation more than the certain value in this light exposure, under the situation of not enough certain value, is judged to be the distant view observation state.
According to the present invention, under the close shot observation state, use territory, first blue arrowband light; Under the distant view observation state; Use enlarges the half breadth of territory, first arrowband light with certain limit territory, second blue arrowband light, therefore, even also can obtain the reflection that enough becomes clear for the distant view observation state.
In addition; The rotary filter that is used for the generation of special lights such as territory, first arrowband light; Any of close shot observation state and distant view observation state no matter; All can dispose territory, a plurality of first arrowband light transmission light filter, therefore, can carry out diagnostic imaging etc. reliably with the mode that can not shorten to the interregnum of taking in the body cavity.
Description of drawings
Fig. 1 is the skeleton diagram of the electronic endoscope system of first embodiment of the invention;
Fig. 2 is the block diagram of electronic endoscope system;
Fig. 3 is the skeleton diagram of rotary filter;
Fig. 4 is that the employed blue light of the rotary filter of presentation graphs 3 sees through light filter, green light filter, the red chart that sees through the spectral transmission of light filter of seeing through;
Fig. 5 A is the chart of the spectral transmission of the rotary filter of presentation graphs 3 employed first blue arrowband territory light transmission light filter and territory, first green arrowband light transmission light filter;
Fig. 5 B is the chart of the spectral transmission of the rotary filter of presentation graphs 3 employed second blue arrowband territory light transmission light filter and territory, second green arrowband light transmission light filter;
Fig. 6 A is the chart of the absorptance of the light in the expression blood vessel;
Fig. 6 B is the chart that the scattering of light coefficient in the soma is given birth in expression;
Fig. 7 A is the key diagram of the shooting control of the CCD when being illustrated in the normal light observation;
Fig. 7 B is the key diagram of the shooting control of the CCD of (close shot) when being illustrated in the special light observation;
Fig. 7 C is the key diagram of the shooting control of explanation CCD of (distant view) when special light is observed;
Fig. 8 is the image graph that (close shot) is shown in the special light image of monitor when special light is observed;
Fig. 9 be when special light is observed (distant view) be shown in monitor the image graph of special light image;
Figure 10 is the flow chart of the effect of expression first embodiment;
Figure 11 is the block diagram of the electronic endoscope system of second embodiment of the invention;
Figure 12 is the skeleton diagram of normal light with rotary filter;
Figure 13 is the skeleton diagram of special light with rotary filter;
Figure 14 A is the key diagram of the shooting control of the CCD when being illustrated in the normal light observation;
Figure 14 B is the key diagram of the shooting control of the CCD of (close shot) when being illustrated in the special light observation;
Figure 14 C is the key diagram of the shooting control of the CCD of (distant view) when being illustrated in the special light observation;
Figure 15 A is the key diagram of rotary filter;
The rotary filter that Figure 15 B is explanation through using Figure 15 A by CCD to the shooting of taking in the body cavity during and the sequential chart of the interregnum that can not take;
Figure 16 A is the key diagram of the rotary filter of comparative example;
The rotary filter that Figure 16 B is explanation through using Figure 16 A by CCD to the shooting of taking in the body cavity during and the sequential chart of the interregnum that can not take.
The specific embodiment
As shown in Figure 1, the electronic endoscope system 10 of first embodiment of the invention possesses: the endoceliac fujinon electronic video endoscope 11 of taking the examinee; Generate endoceliac treatment of picture apparatus 12 based on the signal that obtains by shooting; Supply is to the light supply apparatus 13 of the illumination light of shining in the body cavity; The monitor 14 that shows endoceliac image.
Above-mentioned electronic endoscope system 10 has normal light image model and these two observing patterns of special light image model.In the normal light image model, through by wide band light such as white lights to throwing light in the body cavity, obtain the image of the nature of irradiated body tissue, can carry out comprehensive observation to the irradiated body tissue.In the special light image model, through by territory, arrowband light to throwing light in the body cavity, obtain the image that stress to show top layer blood vessel etc.In this special light image model, the close shot observing pattern of observing under the approaching close shot state of the leading section 16a that exists at fujinon electronic video endoscope 11 and the distance of irradiated body tissue and with the distant view state of the distance of irradiated body tissue under the distant view observing pattern of observing.
Fujinon electronic video endoscope 11 possesses: insert endoceliac flexual insertion section 16, be located at the cardinal extremity part of insertion section 16 operating portion 17, be used for general flexible cord 18 that operating portion 17 is connected with processor device 12 and light supply apparatus 13.16 front is formed with the bend 19 that a plurality of crooked blocks (coltfoal) are linked in the insertion section.Bending section 19 carries out flexure operation through the dihedral knob 21 of operating operation portion in direction up and down.Front end at bending section 19 is connected with leading section 16a, through the flexure operation of bending section 19, and makes leading section 16a towards desirable direction.16a has taken in well-known camera system, illuminator etc. at this leading section.
On general flexible cord 18, adapter 24 is installed at processor device 12 and light supply apparatus 13 sides.Adapter 24 is for having communication with adapter and the light source compound adapter with adapter.Via this adapter 24, fujinon electronic video endoscope 11 is connected with processor device 12 and light supply apparatus 13 dismounting freely.
As shown in Figure 2, light supply apparatus 13 possesses wide band light source 30, rotary filter 31, light filter switching part 32.As wide band light source 30, use xenon lamp, White LED, micro white light source etc., produce from the blue ribbon territory (about 470～700nm) wide band light BB to the red zone territory.Wide band light source 30 continues to light in the use of fujinon electronic video endoscope 11.The wide band light BB that sends from wide band light source 30 incides collecting lens 34 through rotary filter 31.By the wide band light BB of collecting lens 34 optically focused to photoconduction 35 incidents.
Fujinon electronic video endoscope 11 possesses photoconduction 35, CCD44, analog processing circuit (AFE:Analog Front End) 45, imaging control part 46.Photoconduction 35 is heavy caliber optical fiber, fibre bundle etc., and the incident end is inserted light supply apparatus 13, with ejecting end and irradiation lens 48 opposites of being located at leading section 16a.From the illumination light of light supply apparatus 13 by photoconduction 43 leaded lights after, penetrate to irradiation lens 48.Incide the illumination light of irradiation lens 48, the illuminating window 49 of the end face through being installed on leading section 16a is to the body cavity internal radiation.Observation window 50 at the reflected light of the body cavity internal reflection end face through being installed on leading section 16a incides collecting lens 51.
In this embodiment, use CCD44 as imaging apparatus.This CCD is the black-white CCD with spectral sensitivity of regulation, and the reflected light that has passed through collecting lens 51 is received by shooting face 44a.In shooting face 44a two-dimensional arrangement a plurality of well-known pixels are arranged, each pixel is carried out opto-electronic conversion with the reflected light that receives, and accumulates the signal charge that is produced.
As everyone knows, above-mentioned AFE45 by correlated double sample circuit (CDS), automatic gain control circuit (AGC), and analog/digital converter (A/D) (all not shown) constitute.CDS implements the correlated double sampling processing to the image pickup signal from CCD44, removes the noise contribution in the image pickup signal.AGC is so that the mode that image pickup signal converges in the desirable dynamic range will be from the image pickup signal amplification of CDS.A/D will convert digital form into from the image pickup signal of AGC, and deliver to processor device 12 as the image pickup signal of specified bit number.
As shown in Figure 3; In first filter areas 38, be provided with along Zhou Fangxiang in order: the red light that the green light that the blue light that the illumination light (B light) in wide band light BB medium blue colour band territory is seen through sees through light filter 40, see through the illumination light (G light) in wide band light BB medium green colour band territory sees through light filter 41, see through the illumination light (R light) in red zone territory among the wide band light BB sees through light filter 42.Therefore, through the rotation of rotary filter 31, penetrate B light, G light, R light successively from rotary filter 31.The B light, G light, the R light that penetrate successively from rotary filter 31 are known as face order light.
At this, as shown in Figure 4, blue light sees through light filter 40 and has the spectral transmission shown in the curve B, and green light sees through light filter 41 and has the spectral transmission shown in the curve G, and red light sees through light filter 42 and has the spectral transmission shown in the curve R.In addition, the short wavelength side of the long wavelength side of curve B and curve G overlaps a part, and in addition, the short wavelength side of the long wavelength side of curve G and curve R overlaps a part, therefore, in the coloured light of selecting, mixes adjacent coloured light a little.
On second filter areas 39, be provided with along Zhou Fangxiang in order: make territory, the first blue arrowband light transmission light filter 65 that the first blue arrowband territory light Bn1 when being used for the close shot observing pattern among the wide band light BB sees through, territory, the second blue arrowband light transmission light filter 66 that the second blue arrowband territory light Bn2 when making wide band light BB be used for the distant view observing pattern sees through, territory, the first green arrowband light transmission light filter 67 that the first green arrowband territory light Gn1 when making wide band light BB be used for the close shot observing pattern sees through, territory, the second green arrowband light transmission light filter 68 that the second green arrowband territory light Gn2 when making wide band light BB be used for the distant view observing pattern sees through.
The spectral transmission of territory, first blue arrowband light transmission light filter 65 has the distribution shown in the curve B n1 of Fig. 5 A; Therefore, near the roughly 450nm of the first blue arrowband of body cavity internal radiation territory light Bn1 in centre wavelength, light quantity reaches peak value; Than 450nm long wavelength side more; Light quantity sharply descends, and between 450nm and 500nm, light quantity is roughly " 0 ".On the other hand, than 450nm short wavelength side more, though do not reduce so not sharply in the light quantity of long wavelength side, light quantity descends to 400nm from 450nm, and at the position lower than 400nm, light quantity is " 0 ".
Relative with it; The spectral transmission of territory, second blue arrowband light transmission light filter 66 has the distribution shown in the curve B n2 of Fig. 5 B; Therefore, to the second blue arrowband of body cavity internal radiation territory light Bn2, with first blue arrowband territory light Bn1 likewise; At the roughly 450nm of the centre wavelength that reaches peak value than light quantity long wavelength side more, light quantity sharply reduces.On the other hand, than the short wavelength side more of 450nm roughly, territory light Bn1 is different with the first blue arrowband, is keeping between 450nm～400nm under the state of higher light quantity, and light quantity little by little reduces slowly.And near 400nm, light quantity begins rapid reduction, and at the position lower than 400nm, light quantity is " 0 ".Therefore, among the second blue arrowband territory light Bn2, though the i.e. roughly not change of the light quantity of the long wavelength side of 450nm of the centre wavelength among the first blue arrowband territory light Bn1, the light quantity of short wavelength side increases.
Adopt light quantity distribution as above to be based on following reason first blue arrowband territory light Bn1 and second blue arrowband territory light Bn2.Shown in the distribution of the specific absorbance of Fig. 6 A, the top layer blood vessel of light in giving birth to soma that is lower than near the wavelength the 450nm receives extremely strong absorption, and blood vessel is absorbed hardly and directly sees through on the top layer but surpass near the 450nm light.In addition, can know like the distribution of the scattering coefficient of Fig. 6 B, the short light of wavelength, the scattering in soma is strong more.According to the optical absorption characteristics of these blood vessels and relevant opinion and other opinion of light scattering characteristic of giving birth to soma; If the illumination light wavelength surpasses near the 470nm, then the absorption characteristic because of strong light makes the illumination light of being shone can turn back to the leading section 16a of fujinon electronic video endoscope hardly in the blood vessel of top layer.But, in the living soma that surrounds the top layer blood vessel, make a large amount of illumination light reflections of being shone through stronger scattering properties, turn back to the leading section 16a of fujinon electronic video endoscope thus.Therefore, the top layer blood vessel is high with the contrast (contrast) of its living soma on every side, can fully stress expression top layer blood vessel etc.
Be fully to stress top layer blood vessel etc., when when close shot is observed, observing during arbitrary observation,, need shine and do not contain illumination light above near the light of the wavelength domain the 470nm about first blue arrowband territory light Bn1 and second blue arrowband territory light Bn2 with distant view.At this, when the distant view of deficiency in light quantity is observed, use with respect to first blue arrowband territory light Bn1 and near than 470nm short wavelength side second blue arrowband territory light Bn2 that light quantity has been increased more.
On the other hand, the spectral transmission of territory, first green arrowband light transmission light filter 67 has the distribution shown in the curve Gn1 of Fig. 5 A, and therefore, near centre wavelength was 550nm, half breadth was 10nm～20nm to the first green arrowband of body cavity internal radiation territory light Gn1.Relative with it; The spectral transmission of territory, second green arrowband light transmission light filter 68 has the distribution shown in the curve Gn2 of Fig. 5 B, therefore, and to the second green arrowband of body cavity internal radiation territory light Gn2; With first green arrowband territory light Gn1 likewise; Centre wavelength is 550nm, but its half breadth is different with first green arrowband territory light Gn1, is 20～40nm.That is the half breadth of second green arrowband territory light Gn2 wide than first green arrowband territory light Gn1.Therefore, among the second green arrowband territory light Gn2, territory light Gn1 compares with the first green arrowband, and light quantity has more the amount that half breadth is widened.
First green arrowband territory light Gn1 and second green arrowband territory light Gn2 are made as the reasons are as follows of above-mentioned light quantity distribution.Shown in the distribution of the specific absorbance of Fig. 6 A, about surpassing near the light the 450nm, the pairing optical absorption characteristics of blood vessel reduces, but between 500nm～600nm, particularly near 530nm～570nm, blood vessel pairing optical absorption characteristics in middle level improves.And about surpassing the light of 600nm, absorption characteristic reduces once more.In addition, shown in the distribution of the scattering coefficient of Fig. 6 B, wavelength is long more, and scattering coefficient reduces more gradually, but between 500nm～600nm, gives birth to the almost not variation of scattering properties in the soma.
Therefore; According to about the optical absorption characteristics of these blood vessels with give birth to opinion and other opinion of the light scattering characteristic of soma; In light wavelength be between 500nm～600nm, particularly near 530nm～570nm; The variation of scattering properties of living soma that comprises the middle level blood vessel is little, therefore, roughly certain by the light quantity of the light of giving birth to soma's reflection and return electron forward end section of endoscope 16a.Relative with it; The middle level blood vessel that comprises in this life soma is with respect between 500nm～600nm, particularly near the light 530nm～570nm shows higher optical absorption characteristics; Therefore, the ratio of light that in the light of middle level blood vessel irradiation, turns back to the leading section 16a of fujinon electronic video endoscope reduces.Therefore, light wavelength is under between 500um～600nm, particularly near 530nm～570nm, and the middle level blood vessel improves with the contrast of livings soma around it, therefore, can fully stress demonstration middle level blood vessel etc.
Be fully to stress to show middle level blood vessel etc., when close shot is observed during with the distant view observation during arbitrary observation, all need light wavelength band territory between 500nm～600nm, preferred 530nm～570nm.If between 500nm～600nm, be preferably in the scope of 530nm～570nm; Then can fully stress to show middle level blood vessel etc.; Therefore; When the distant view of deficiency in light quantity is observed, use second green arrowband territory light Gn2, it increases light quantity through centre wavelength is further widened for the half breadth of the first green arrowband territory light Gn1 of 550nm roughly.
Under the situation of normal light image model; Utilizing rotary filter 31 with B light (between 1/3 rotation of rotary filter 31) between look-out station shines; Shown in Fig. 7 A; B light is carried out opto-electronic conversion and accumulates the step of signal charge and step that the signal charge that will accumulate is read as blue image pickup signal, alternately repeated with cycle of regulation.
Secondly; Switching to illumination light under the situation of G light from B light through the rotation of rotary filter 31; Equally; Between 1/3 rotation of rotary filter 31, with G light carry out opto-electronic conversion and accumulate the step of signal charge and step that the signal charge that will accumulate is read as green image pickup signal by alternately repetition.
Equally, utilizing rotary filter 31 that illumination light is switched to from G light under the situation of R light, between 1/3 rotation of rotary filter 31, R light is being carried out the step of opto-electronic conversion and replaced repetition as the step that red image pickup signal is read.
Relative with it; When the special light image model; Under the situation of the state that is in the close shot observation; Shown in Fig. 7 B, selecting between the first blue arrowband territory light Bn1 by rotary filter 31, be between 1/4 rotation of rotary filter 31, first blue arrowband territory light Bn1 is carried out opto-electronic conversion and accumulates the step of signal charge and step that this signal charge is read as territory, first blue arrowband image pickup signal was alternately repeated by the cycle with regulation.Through the rotation of rotary filter 31 from the first blue arrowband when territory light Bn1 switches to second blue arrowband territory light Bn2; Shining between this second blue arrowband territory light Bn2, being between 1/4 rotation of rotary filter 31, do not carry out accumulating of signal charge and reading of image pickup signal.
If rotary filter 31 is further rotated, then territory light Bn2 switches to first green arrowband territory light Gn1 from the second blue arrowband.Shining between this first green arrowband territory light Gn1, be between 1/4 rotation of rotary filter 31, first green arrowband territory light Gn1 is carried out opto-electronic conversion and accumulates the step of signal charge and the alternately repetition of step quilt that this signal charge is read as territory, first green arrowband image pickup signal.Secondly, through the rotation of rotary filter 31, territory light Gn1 switches to second green arrowband territory light Gn2 from the first green arrowband.Shining between this second green arrowband territory light Gn2, being between 1/4 rotation of rotary filter 31, do not carry out accumulating of signal charge and reading of image pickup signal.
In addition; When the special light image model, under the situation of the state that is in the distant view observation, shown in Fig. 7 C; Taking out between the first blue arrowband territory light Bn1 from rotary filter 31, being between 1/4 rotation of rotary filter 31, do not carry out accumulating of signal charge and reading of image pickup signal.When rotary filter 31 was further rotated, territory light Bn1 switched to second blue arrowband territory light Bn2 from the first blue arrowband.Between irradiation this second blue arrowband territory light Bn2, be between 1/4 rotation of rotary filter 31, second blue arrowband territory light Bn2 is carried out opto-electronic conversion and accumulates the step of signal charge and the step that this signal charge is read as territory, second blue arrowband image pickup signal was repeated by the cycle with regulation.
Secondly, territory light Bn1 switches to first green arrowband territory light Gn1 from the first blue arrowband.Shining between this first green arrowband territory light Gn1, being between 1/4 rotation of rotary filter 31, do not carry out accumulating of signal charge and reading of image pickup signal.Through the rotation of rotary filter 31, territory light Gn1 switches to second green arrowband territory light Gn2 from the first green arrowband.Between the irradiation second green arrowband territory light Gn2, be between 1/4 rotation of rotary filter 31, second green arrowband territory light Gn2 is carried out opto-electronic conversion and accumulates the step of signal charge and step that this signal charge is read as territory, second green arrowband image pickup signal is repeated.
Under the situation that is set at the normal light image model; DSP55 carries out signal processing such as white balance adjustment, tone processing, gray scale processing, definition processing to blue image pickup signal, green image pickup signal, the red image pickup signal from AFE45 output, generates the normal light view data.Resulting normal light view data is stored in frame memory 56.
On the other hand, be set under the special light image model under the situation of close shot observing pattern, to implementing above-mentioned signal processing respectively from the first blue arrowband territory image pickup signal and territory, the first green arrowband image pickup signal of AFE45 output.Each image pickup signal of having implemented signal processing is used as close shot and is stored in frame memory 56 with the special light view data.In addition; Be set under the special light image model under the situation of distant view observing pattern; With the close shot observing pattern likewise; The second blue arrowband territory image pickup signal and territory, second green arrowband image pickup signal after being implemented above-mentioned signal processing, are stored in frame memory 56 as distant view with the special light view data respectively.
Observation state detection unit 57 detects light exposure with special light view data and distant view with arbitrary view data the special light view data from the close shot that is stored in frame memory 56.In detected light exposure is under the situation more than the certain value, is judged to be current point and is in the close shot observation state.Under the situation that is judged to be the close shot observation state, be automatically made the close shot observing pattern.If be set at the close shot observing pattern, the mode of the first blue arrowband territory image pickup signal and territory, first green arrowband image pickup signal that obtains when then taking with next time for imaging control part 46 is sent indication (with reference to Fig. 7 B).
On the other hand, under the situation that detects the not enough certain value of light exposure, be judged to be current point and be in the distant view observation state.Be judged to be under the situation that is in the distant view observation state, be automatically made the distant view observing pattern.After being set at the distant view observing pattern, send indication (with reference to Fig. 7 C) with the mode that when taking next time, obtains the second blue arrowband territory image pickup signal and territory, second green arrowband image pickup signal for imaging control part 46.
Display control circuit 58 is read the normal light view data from frame memory 56 under the situation that is in the normal light image model, and on monitor 14, shows the normal light image based on the normal light view data of reading.In addition, in the special light image model, place under the situation of close shot observing pattern, read close shot from frame memory 56 and use the special light view data.And, use the special light view data based on the close shot of reading, on monitor 14, show the special light image when close shot shown in Figure 8 is observed.
In addition, in the special light image model, place under the situation of distant view observing pattern, read distant view from frame memory 56 and use the special light view data.And, the special light image when showing that with the special light view data distant view shown in Figure 9 is observed on monitor 14 based on the distant view of reading.Among the present invention, the deficiency in light quantity when observing through making half breadth broadening to the illumination light of body cavity internal radiation compensate distant view.At this moment, owing to, do not bring influence so can not observe to the special light of emphasical demonstrations such as top layer blood vessel seeing that the scattering properties of the optical absorption characteristics of blood vessel and its circumvascular living soma makes half breadth broadening.
Secondly, the effect to first embodiment describes with reference to the flow chart of Figure 10.At first, switch SW50, switch to the special light image model from the normal light image model through the operation image model.In the special light image model, be set at the close shot observing pattern in setting in the early stage.Light filter switching part 131 is according to the switching to the special light image model, and second filter areas 39 of rotary filter 31 is placed on the light path of wide band light source 30.Through under this state, making rotary filter 31 rotation, with first blue arrowband territory light Bn1, second blue arrowband territory light Bn2, first green arrowband territory light Gn1, and second green arrowband territory light Gn2 (being special light) successively to endoceliac look-out station irradiation.In addition, in the special light image model, yet can initial setting be made as the close shot observing pattern and be made as the distant view observing pattern.
And imaging control part 46 is according to only territory light Bn1 and first green arrowband territory light Gn1 indicate from the mode that CCD44 reads image pickup signal when look-out station shines in the first blue arrowband.Thus, obtain the first blue arrowband territory image pickup signal and territory, first green arrowband image pickup signal.The resulting first blue arrowband territory image pickup signal and territory, first green arrowband image pickup signal are stored in frame memory 56 as close shot with the special light view data after being implemented signal processing such as white balance adjustment, tone processing, gray scale processing, definition processing through DSP55.And, use the special light view data based on the close shot of reading from frame memory 56, on monitor 14, show the special light image when close shot shown in Figure 8 is observed.
In addition, observation state detection unit 57 detects light exposure according to the close shot that is stored in frame memory 56 with the special light view data.And, be under the situation more than the certain value in light exposure, the observation state that is judged to be current point is the close shot observation state, former state keeps the close shot observing pattern.On the other hand, under the situation of the not enough certain value of light exposure, judge that the observation state of current point is the distant view observation state.If be judged to be the distant view observation state, then switch to the distant view observing pattern from the close shot observing pattern.
According to the switching to the distant view observing pattern, imaging control part 46 is only indicate second blue arrowband territory light Bn2 and second green arrowband territory light GI12 from the mode that CCD44 reads image pickup signal when look-out station shines.Thus, obtain the second blue arrowband territory image pickup signal and territory, second green arrowband image pickup signal.Territory, resulting second blue arrowband image pickup signal and territory, second green arrowband image pickup signal behind the identical signal processing, are stored in frame memory 56 as distant view with the special light view data through DSP55 when having implemented with the close shot observing pattern.And, use the special light view data based on the distant view of reading from frame memory 56, on monitor 14, show the special light image when distant view shown in Figure 9 is observed.
When the distant view observing pattern, likewise, utilize the observation state detection unit to carry out the judgement of observation state during also with the close shot observing pattern.Therefore, be certain value when above in light exposure, switch to the close shot observing pattern from the distant view observing pattern.On the other hand, when the not enough certain value of light exposure (the not enough certain value of light exposure but can fully stress to show top layer blood vessel etc. time), as long as set the special light image model, just can former state continuation distant view observing pattern.
Secondly, with reference to Figure 11 second embodiment of the present invention is described.In this second embodiment, electronic endoscope system 100 uses two rotary filters and sends face order light or the special light of RGB.In addition, only different portion's material in first embodiment and second embodiment is described, and for the explanation of common component omission.
In light supply apparatus 13, be provided with normal light with rotary filter 101 and special light with rotary filter 102.Normal light passes through motor 103,104 with rotating shaft 101a with rotary filter 101 and special light with rotary filter 102, and 102a is that the center rotates by certain speed.
Shown in figure 12; Normal light with rotary filter 101 on, be provided with along Zhou Fangxiang in order: the peristome 113 that the red light that the green light that the blue light that the light (B light) in wide band light BB medium blue colour band territory is seen through sees through light filter 110, see through the light (G light) in wide band light BB medium green colour band territory sees through light filter 111, see through the light (R light) in red zone territory among the wide band light BB sees through light filter 112, wide band light BB is directly seen through.Normal light is with in the rotary filter 101, and blue light sees through light filter 110, green light sees through light filter 112, reaches on the light path of any entering wide band light source 30 in the peristome 113 through light filter 111, red light.
On the other hand; Shown in figure 13, be provided with along Zhou Fangxiang in order at special light: territory, the second green arrowband light transmission light filter 118 that territory, the first green arrowband light transmission light filter 117 that territory, the second blue arrowband light transmission light filter 116 that make territory, first blue arrowband light transmission light filter 115 that the first blue arrowband territory light Bn1 when being used for close shot among the wide band light BB and observing sees through, the second blue arrowband territory light Bn2 when making wide band light BB be used for distant view to observe sees through, the first green arrowband territory light Gn1 when making wide band light BB be used for close shot to observe see through, the second green arrowband territory light Gn2 when making wide band light BB be used for distant view to observe see through with rotary filter 102.
Be provided with the light filter switching part 120 that rotating shaft 102a is moved in the orthogonal direction of light path with wide band light BB at special light on rotary filter 102.Through this light filter switching part 120, special light with rotary filter 102 make territory, light transmission light filter 116, the first green arrowband, territory, light transmission light filter 115, the second blue arrowband, territory, first blue arrowband light transmission light filter 117, and territory, second green arrowband light transmission light filter 118 in any light filter at the on position on the light path of wide band light source 30 with make between the retreating position that rotary filter integral body keeps out of the way from the light path of wide band light BB and move freely.
In second embodiment, under the situation that is set at the normal light image model, special light places retreating position with rotary filter 102.Therefore, the wide band light BB from wide band light source 30 directly shines with rotary filter 101 to normal light.Under this state, through making normal light, with B light, G light, R light, wide band light BB irradiation body intracavity in order with rotary filter 101 rotation.
In second embodiment, owing to be provided with the peristome 113 of special light on rotary filter 101, so not only with B light, G light, R light but also can be with wide band light BB to the body cavity internal radiation through usefulness at normal light.Therefore, shown in figure 14 when receiving endoceliac catoptrical CCD44 by imaging control part 46 control, identical in irradiation B light, G light, R light time with first embodiment, carry out accumulating and reading of signal; But when irradiation wide band light BB, do not carry out accumulating and reading of signal.
On the other hand, under the situation that is set at the special light image model, special light places on position with rotary filter 102.And, when normal light is positioned on the light path of wide band light BB with the peristome 113 of rotary filter 101, normal light is stopped with the rotation of rotary filter 101.Under this state, through making special light with rotary filter 102 rotation, with first blue arrowband territory light Bn1, second blue arrowband territory light Bn2, first green arrowband territory light Gn1, second green arrowband territory light Gn2 in order to shining in the body cavity.Under the special light image model,, therefore, omit the control of the CCD44 that relevant imaging control part 46 carries out to the kind and the order identical (with reference to Fig. 7 B, Fig. 7 C) of the illumination light of body cavity internal radiation.
In the above-described embodiment; Half breadth through with territory, the arrowband light of blueness or green territory, arrowband light enlarges; Deficiency in light quantity when distant view is observed compensates; But use territory, red arrowband light to carry out also can enlarging the half breadth of territory, red arrowband light under the situation of distant view observation on this basis.
In the above-described embodiment; When close shot is observed and distant view half breadth is changed when observing, but, make the half breadth variation of territory, arrowband light according to the distance of endoscope distal end portion and irradiated body tissue preferably with its further vague generalization; Promptly the distance with the irradiated body distance is far away more, and half breadth increases more; Its distance is near more, and half breadth reduces more.
[embodiment]
Below, based on embodiment and comparative example the present invention is done more specifically explanation.Among this embodiment, in the close shot observing pattern in special light portrait pattern, use rotary filter 31 shown in Figure 15, carry out endoceliac shooting.This rotary filter 31 identical with shown in above-mentioned first embodiment.Second filter areas 39 when on rotary filter 31, being provided with first filter areas 38 when being used for normal light portrait pattern and being used for special light portrait pattern.Wherein, On second filter areas 39, be provided with territory, light transmission light filter 67, the second green arrowband, territory, light transmission light filter 66, the first green arrowband, territory, light transmission light filter 65, the second blue arrowband, territory, first blue arrowband light transmission light filter 68 along Zhou Fangxiang in order.Therefore; Through under the state of placing second filter areas 39 on the light path of wide band light BB, making rotary filter 31 rotations, with first blue arrowband territory light Bn1, second blue arrowband territory light Bn2, first green arrowband territory light Gn1, second green arrowband territory light Gn2 in order to shining in the body cavity.
On the CCD in endoscope distal end portion, at first, in the incident first blue arrowband during light Bn1 of territory, during making a video recording in (1/4 rotation of rotary filter 31 during) carry out accumulating of signal and read.Then first blue arrowband territory light Bn1 when the CCD incident, does not carry out accumulating and reading of signal with second blue arrowband territory light Bn2.When therefore, shining first blue arrowband territory light Bn2 (rotary filter 31 1/4 the rotation during) be can not be to the interregnum of taking in the body cavity.
Secondly, at then second blue arrowband territory light Bn2 with first green arrowband territory light Gn1 during to CCD incident, during making a video recording in (1/4 of rotary filter 31 rotate during) carry out accumulating of signal once more and read.In addition, with second green arrowband territory light Gn2 during, do not carry out accumulating and reading of signal at then first green arrowband territory light Bn2 to CCD incident.(rotary filter 31 rotation 1/4 during) is can not be to the interregnum of taking in the body cavity when therefore, shining second blue arrowband territory light Gn2.
[comparative example]
In the comparative example, when the close shot observing pattern of special light portrait pattern, use rotary filter shown in Figure 16 200 to carry out endoceliac shooting.On rotary filter 200, also with rotary filter 31 likewise, second filter areas 202 when being provided with first filter areas 201 when being used for normal light portrait pattern and being used for special light portrait pattern.Wherein, In second filter areas 202; Different with rotary filter 31, be provided with territory, light transmission light filter 66, the second green arrowband, territory, light transmission light filter 67, the second blue arrowband, territory, light transmission light filter 65, the first green arrowband, territory, first blue arrowband light transmission light filter 68 along Zhou Fangxiang in order.Therefore; Through under the state of placing second filter areas 202 on the light path of wide band light BB, making rotary filter 200 rotations, with first blue arrowband territory light Bn1, first green arrowband territory light Gn1, second blue arrowband territory light Bn2, second green arrowband territory light Gn2 in order to the body cavity internal radiation.
Among the CCD in endoscope distal end portion, at first, carry out accumulating and reading of signal in (1/4 rotation of rotary filter 200 during) during the incident first blue arrowband territory light Bn1.With first green arrowband territory light Gn1 (rotary filter 200 rotations 1/4 during) during CCD is incident, carry out the accumulating and read of signal of CCD at then first blue arrowband territory light Bn1.And territory light Bn2, second green arrowband territory light Gn2 do not carry out accumulating of signal and read during CCD is incident in the second blue arrowband.Therefore, carry out first blue arrowband territory light Bn1 shooting during and carry out first green arrowband territory light Gn1 shooting during, be to be can not be between rotary filter 200 rotation 1/2 to the interregnum of taking in the body cavity.
[comparison of embodiment and comparative example]
As above, in an embodiment, in the close shot observing pattern, interregnum is merely between 1/4 rotation of rotary filter, and is relative with it, and in comparative example, interregnum is that therefore, the interregnum of comparative example is than embodiment duration between 1/2 rotation of rotary filter.Therefore, in an embodiment,, can not take during endoceliac shortly, therefore, can carry out the diagnostic imaging of endoscope when using etc. reliably with respect to comparative example.In addition, about the difference of the interregnum of this embodiment and comparative example, we can say under the distant view observing pattern also identical.
Claims (8)
1. electronic endoscope system, it possesses:
Wide band light source, its generation comprise the wide band light from the blue ribbon territory to the red zone territory;
First rotary filter; It alternately disposes a plurality of first arrowband territory light transmission light filter and territory, a plurality of second arrowband light transmission light filter according to the mode that first arrowband territory light and territory, second arrowband light are alternately shone along Zhou Fangxiang in body cavity; Said each territory, first arrowband light transmission light filter makes territory, first arrowband light transmission in the said wide band light, territory, second arrowband light transmission that said each territory, second arrowband light transmission light filter makes the half breadth of territory, said first arrowband light enlarge with certain limit;
Imaging apparatus, it is taken said endoceliac irradiated body tissue, and produces image pickup signal, and this shootings sub-prime is configured in the said endoceliac endoscope distal end of insertion portion;
The observation state decision maker; It is based on said image pickup signal, judgement be the distance at said endoscope distal end portion and said irradiated body tissue be near state be taken under the close shot observation state or be that state far away is to be taken under the distant view observation state in the distance of said endoscope distal end portion and said irradiated body tissue; And
Video camera controller, it controls said imaging apparatus, thus, when being judged to be said close shot observation state, takes in irradiation said first arrowband territory light time; When being judged to be said distant view observation state, take in irradiation said second arrowband territory light time.
2. electronic endoscope system as claimed in claim 1, wherein,
Territory, said first arrowband light comprises: is restricted to the first blue arrowband territory light in the specific band territory in the said blue ribbon territory and is restricted to green territory, the first green arrowband light of being with the specific band territory in the territory,
Territory, said second arrowband light comprises: with the half breadth of territory, said first blue arrowband light with the second blue arrowband territory light of certain expanded range with the half breadth of territory, said first green arrowband light territory, second green arrowband light with certain expanded range.
3. electronic endoscope system as claimed in claim 2, wherein,
Territory, said a plurality of first arrowband light transmission light filter is: make the first blue arrowband territory light transmission light filter of territory, the first blue arrowband described in said wide band light light transmission and make territory, the first green arrowband light transmission light filter of territory, the first green arrowband described in said wide band light light transmission
Territory, said a plurality of second arrowband light transmission light filter is: make the second blue arrowband territory light transmission light filter of territory, the second blue arrowband described in said wide band light light transmission and make territory, the second green arrowband light transmission light filter of territory, the second green arrowband described in said wide band light light transmission.
4. electronic endoscope system as claimed in claim 3, wherein,
Said first rotary filter possesses:
First filter areas, its blue light that is provided with the B light transmission that makes said blue ribbon territory in order see through light filter, make the green light of the G light transmission in said green band territory see through light filter and make the red light of the R light transmission in said red zone territory see through light filter; And
Second filter areas; It is set at the inboard or the outside with respect to said first filter areas, is provided with territory, said first blue arrowband light transmission light filter, territory, said second blue arrowband light transmission light filter, territory, said first green arrowband light transmission light filter, reaches territory, said second green arrowband light transmission light filter along Zhou Fangxiang in order in this second filter areas.
5. electronic endoscope system as claimed in claim 4, wherein,
Using said B light, said G light, said R light to carry out under the situation of normal light observation; On the light path of said wide band light, place said first filter areas; Through making said first rotary filter rotation; Said B light, said G light, said R light are shone in the said body cavity in order, and
Use territory, said first blue arrowband light, territory, said second blue arrowband light, territory, said first green arrowband light, and territory, said second green arrowband light carry out under the situation that special light observes; On the light path of said wide band light, place said second filter areas; Through making said first rotary filter rotation, territory, said first blue arrowband light, territory, said second blue arrowband light, territory, said first green arrowband light, territory, said second green arrowband light are shone in the said body cavity in order.
6. electronic endoscope system as claimed in claim 3, wherein,
Also possess second rotary filter, this second rotary filter have in order configuration with lower component:
Make the blue light of the B light transmission in blue ribbon territory described in the said wide band light see through light filter;
Make the green light of the G light transmission in the territory of green band described in the said wide band light see through light filter;
Make the red light of the R light transmission in red zone territory described in the said wide band light see through light filter; And
The peristome that said wide band light is directly seen through.
7. electronic endoscope system as claimed in claim 6, wherein,
Using said B light, said G light, said R light to carry out under the situation of normal light observation; Make under the state that said first rotary filter keeps out of the way in light path from said wide band light; Make said second rotary filter rotation, and said B light, said G light, said R light are shone in the said body cavity in order;
Use territory, said first blue arrowband light, territory, said second blue arrowband light, territory, said first green arrowband light, and territory, second green arrowband light carry out under the situation that special light observes; Under the state of the peristome of placing said second rotary filter on the light path of said wide band light; Make said first rotary filter rotation, and territory, said first blue arrowband light, the said second blue herring bone city light, territory, said first green arrowband light, territory, said second green arrowband light are shone in the said body cavity in order.
8. electronic endoscope system as claimed in claim 1, wherein,
Said observation state detection unit detects light exposure according to said image pickup signal, is to be judged to be the close shot observation state under the situation more than the certain value in this light exposure, under the situation of not enough certain value, is judged to be the distant view observation state.
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| CN109310285A (en) * | 2016-09-01 | 2019-02-05 | Hoya株式会社 | Electron mirror and electronic endoscope system |
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| JP5715602B2 (en) * | 2012-09-07 | 2015-05-07 | 富士フイルム株式会社 | Endoscope system and method for operating endoscope system |
| JP6389377B2 (en) * | 2014-05-27 | 2018-09-12 | Hoya株式会社 | Endoscopy processor |
| JP2018019975A (en) * | 2016-08-04 | 2018-02-08 | Hoya株式会社 | Turret-type optical element |
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| JP2012045264A (en) | 2012-03-08 |
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