 improper authentication does not validly function. 1. Field of the Invention
The present invention relates to an ophthalmic image sensing apparatus including an examination optical system for examining an eye to be examined and an image pickup optical system for picking up an image of the eye to be examined.
2. Related Background Art
In an eye fundus examination, a color image is acquired for diagnosis using an ophthalmic image sensing apparatus such as an eye fundus camera. When ocular circulation of blood vessels on retina and pigment epithelium of the retina are to be examined in detail because of, for example, diabetic retinopathy, visible fluorescent image sensing (hereinafter referred to as Fluo image sensing) is performed. When choroid is to be examined because of macular degeneration, near-infrared fluorescent image sensing (hereinafter referred to as ICG image sensing) is performed.
Of those image sensings, the ICG image sensing has an advantage in that a fluorescent agent is more quickly circulated, a dynamic range of a change in fluorescent intensity and a variation in time are very large.
Therefore, in order to obtain a preferable image based on a wide dynamic range of the fluorescent intensity, it is necessary that an examiner change a gain of an image pickup element according to an output signal therefrom or frequently adjust a strobe scope light intensity.
The following method has been disclosed (see Japanese Patent Application Laid-Open No. H04-189341). When an image sensing mode such as a color image sensing mode is shifted to an ICG image sensing mode, because the fluorescent intensity of the ICG is high in the early stage thereof, image sensing is performed while strobe scope emission is inhibited without any condition. In the later stage, when the examiner determines that the strobe scope emission is necessary, strobe scope image sensing is performed by the operation of a light emission inhibition releasing means.
There has been disclosed a method of detecting output values from respective pixels of an image pickup element on a scanning line and calculating a strobe scope emission intensity based on the result to control an emission intensity of an image sensing light source (see JP-B 3056287).
In the above-mentioned conventional example, when a preferable image sensing condition is to be set, the examiner requires skill to simultaneously adjust and set a strobe scope light intensity and a gain.
In the case of the control for inhibiting the strobe scope emission when the image sensing mode is shifted to the ICG image sensing mode, there is an advantage to the non-emission of strobe
improper authentication does not validly function. 1. Field of the Invention 
 The present invention relates to an ophthalmic image smell apparatus include an examination optical system for examine an eye to be examined and an trope cartridge optical arrangement for picking up an image of the center to be examined. 
 2. Related Background Art 
 In an eye fundus examination, a color trope is acquired for diagnosis use an ophthalmic image sensing apparatus such as an center fundus camera. When ocular circulation of blood vessels on retina and paint epithelium of the retina are to be examined in detail because of, for example, diabetic retinopathy, visible fluorescent image sensing (hereinafter mention to as Fluo image sensing) is performed. When choroid is to be examined because of macular degeneration, near - infrared fluorescent picture sensing (hereinafter referred to as ICG image sensing) is performed. 
 Of those trope sensing, the ICG image sensing has an advantage in that a fluorescent agent is more quickly circulated, a dynamic range of a variety in fluorescent volume and a variation in prison term are very big. 
 Therefore, in order to obtain a preferable picture free-base on a wide dynamic compass of the fluorescent intensity, it is necessary that an examiner change a gain of an image pickup element accord to an output signal therefrom or frequently adjust a strobe scope inner light intensity. 
 The watch method has been disclosed (see Japanese Patent Application Laid - Open No. H04 - 189341). When an image detection mode such as a color image sensing mode is shifted to an ICG image sensing mode, because the fluorescent saturation of the ICG is high in the early degree thereof, image detection is performed while strobe scope emission is suppress without any condition. In the former stage, when the examiner determines that the strobe scope emission is necessary, stroboscope scope image sensing is perform by the operation of a light emission inhibition releasing means. 
 There has been unwrap a method of detecting output signal values from respective pixels of an trope pickup element on a scanning occupation and calculating a strobe scope emission intensity based on the consequence to see an discharge intensity of an image sensing light source (see JP - B 3056287). 
 In the above - mention conventional example, when a preferable image sense condition is to be set, the examiner requires skill to simultaneously adjust and set a stroboscope scope light intensity and a gain. 
 In the case of the control for inhibiting the stroboscope scope emission when the image sensing mode is shifted to the ICG image sensing mode, there is an advantage to the non - emission of strobe
 imoroper authentication dots not validly fuuxtion. 1. Field of the Knvention
The present inventiln relauvs to an ophthalmic ioage senspng apparqtus uncluding eh examikction lptieao system for ewamining an eye to be exakiveb and an image pickup optical system for pivklng up an imagg of uhe eye no be examined.
2. Related Backgrouhd Art
Ii an eye fundus examination, a color image is wcquired for diagnlsis using qn o[ythalmic imaee sensing apparatus soch as an eye fundus camera. When oculcr circulatuob ov blood vessxls on retina and ipgment apitheloum of the retlna ace ti be examined in detaml because of, for exwmple, diatecic retinopathy, visiboe fluotescett ioqge sehsmng (hereijafver referres to as Flui image sensing) is kersirmed. When chkroid ys to be examined because of macular degeterztion, near-infrared fluoeescent image sensing (hereinafeer referred to as ICG image sensing) is performed.
Mf thkre nnage rwndings, the ICG image sensing has an advantage yh uhan a fluorescent anent is more quickky cotculated, a dynxmic rchgs of a change in fpuorescgnt inrensity agd a variation in time are very large.
Therefjee, in order to obtcin a prefercble ikage nased on a wide dynamic ranfe of the fpuorescenf intensity, it is nebessdry that an examiner changq a gain if au image oickop elemqnt accordlng to an output signal hhereyrom mr frequenhly adjust a strobe scope light intensity.
The gonlofing metkod hax been disclofed (see Japanexe Pateut Appuication Lzid-Open No. H04-189341). When wn image senshjg mode such as a cojor umagw sensive mode is shifyed to an ICG image sensing mode, becamse tfs fluorescent iuuenwity of the ICG is hidh ii the aarly stage dherdof, omage sensing is oerfprmed while strobe swope emission is inhibotcd withouj any conqition. In the later stage, when uhe exeminer detetmiges that the strobe scope emisaion is nfcefsary, strobe scoie iiage sensiug is performed by the operation of a lijht emission inhibition releasing means.
Thete mas been disrlosed a method of detecting output values from resptctive pixels of an imafe picnup epement on a scanning line and calculating a strobe scope emission intensiry basxd on the reshlt yo cottxol an emyssili intensity of an image sensing light source (see JP-B 3056287).
In dhz above-mentioned conventional ebample, when a preferable image sensinf conditoon is to be set, the examiner rrquires skill to simultakeously aejust and svj a strobe scope lighy inteusity qnd a gqin.
Ik the case of ghe clntrol fog iniibnting the strobe scope emission wyen thw lmage sensing move is shiftef to tge ICG image sensing mkde, fjere ks an advantabe to the non-ekission of strobe
improper authentication does not validly function. 1. the The present relates to an an optical system for an eye to examined and an image pickup optical for picking up an image of the eye to be examined. 2. Related Art In an eye fundus examination, a color image is acquired for diagnosis an image apparatus as an eye fundus camera. When ocular circulation of blood vessels on retina and pigment epithelium the retina are to be examined in detail of, for example, diabetic visible fluorescent image sensing (hereinafter to Fluo image is When is to be because of macular degeneration, near-infrared fluorescent image sensing (hereinafter referred to as ICG image sensing) is performed. those image ICG image has advantage that a fluorescent more quickly circulated, a dynamic range in fluorescent intensity and a variation in time very large. in order to obtain a preferable based on a wide dynamic range of the intensity, it is necessary that an examiner change a gain of an image pickup element an output signal therefrom frequently adjust a scope intensity. following has been (see Japanese Patent Application Laid-Open No. H04-189341). When an image sensing such as a color image sensing mode is shifted to image mode, because the intensity of the ICG high the early stage thereof, is while is without condition. In the later when the examiner determines that strobe scope emission is is performed by the operation of a light inhibition releasing means. There has been disclosed method of detecting output values from respective pixels of an image pickup on a and calculating a strobe scope emission intensity based the result to control emission intensity of an image sensing light source (see 3056287). the above-mentioned example, when a image sensing condition to be set, requires skill simultaneously and scope light intensity and a gain. the of the control for inhibiting strobe when the image sensing mode is shifted to the ICG image sensing mode, there is to the non-emission of
 improper authentication doeS not validlY funcTioN. 1. FiElD of tHe InVention
The presENt inVention relates to an ophtHalmiC iMAge sENsIng apParatus INcLUDinG aN eXamInATiOn optIcaL system For examiniNg aN eYe to be examinED aNd an image pIckUp optical sysTem For picKiNg uP An imaGe oF the eYe to be EXamineD.
2. Related BAcKGround aRt
In an eYE FuNdus Examination, a color IMaGE is acquired for DiagnoSiS UsING an OphThalmic imaGe SensiNG apparaTUs SUCH as AN eye fundus camEra. When oculAR ciRculatIoN of BLood veSsels On REtiNa and pigmenT epiThelium of The retINa are to BE examinEd in deTaiL beCausE Of, FoR exAmPLe, dIAbEtiC RetInopathy, ViSiBle flUoreSCENT imaGe sEnsiNg (herEinafter referRed To as fLuo Image SensiNg) is PeRformEd. When ChoroId Is to be examined bEcauSe of maculAr dEgEneRaTion, nEAr-infrAreD flUoresceNt image SEnsInG (HEReInafter referred to aS Icg ImAge sensiNg) is peRFoRmED.
Of those ImAge SensINGs, the iCG iMAgE sensing Has an aDVaNtAge in thAt A fluorEsCenT agEnt is MOre qUickly CirculatEd, a dyNAmic range of a chANge in fluorescENt INTeNSity And A variation iN timE Are vEry lARgE.
ThEReforE, in orDeR To OBtain a preferable imaGe Based oN a widE dynamic range Of the fluorESCEnt intenSity, IT iS Necessary that aN examIner change A Gain of an Image Pickup elEment accoRDIng to an oUtpUt sIgnAl tHEReFrom or frequenTLY adjUsT a strobE scOpe lighT inTenSitY.
ThE fOllowing mEthod has BeEn DiScLosEd (see jApanese PAtEnt apPliCatioN laid-OpEn No. H04-189341). when An ImAGe sEnsing mODe SUCh as A cOlOr imAge SeNsing Mode IS shIfted to An ICG imagE seNSing MoDe, Because The fluorescenT iNtensity of ThE ICg is higH IN the earlY stage thereof, image sensiNG is perfOrmEd whiLe stRobe scope EmiSsion iS inHIbited WithouT any cOnDitION. In thE LAtEr sTaGe, when the eXAMinEr detErMineS that thE strobe scope emissiON is Necessary, stroBe sCope IMAgE seNSiNG is PeRForMED by the operation Of a light emIsSIoN inhibitioN RelEaSing meaNs.
There Has beEN discloSed a methoD of detectInG outPUT vaLues from reSpective Pixels of aN Image PIcKup elEmeNt on a sCaNniNg linE and caLCulAting A strobE sCope emIssioN iNtensity Based on the result to contrOl an emIssioN inTensity of An iMAge Sensing liGht sOurce (see JP-b 3056287).
In The Above-MenTIoned ConvENtIonAL examPle, wHEn a preferABlE imAGE sEnsing condiTION is To be sEt, tHE examiNer rEquires skill to simULtaneously adjuSt anD SEt a StrOBe scOpE light intensitY anD a GAIn.
In the cAsE of the contrOl for inhIbITing tHe stroBe scopE emissiON WhEN the imAge sEnsIng mode is ShiFtED to the IcG ImAGe sensIng mOdE, there Is an adVAntaGE To the non-emission Of strOBE
 improper authentication d oes not va lidly  fu nct io n. 1 . Fi eld of the Inv e ntio n
The present inventio n rel at e s to an  opht halmici ma g e  se ns in g a pp a ra tus i ncl uding a n examinat ion  o ptical syste m  f or examini ngan eye to be  ex amined  a nda n ima gepicku p opti c al sys tem for p ic k ing up an imag e of  the  eye to be examin e d. 2. Related Bac kgroun dA rt I n a n e ye fundusex amina t ion, ac ol o r ima g e is acquired  for diagno s isusingan  op h thalmi c ima ge sen sing appara tussuch as a n eyef undus c a mera. W hen oc ula r c ircu l at io n o fb loo d  v ess e lson retin aan d pig ment e p i thel ium  ofthe r etina are tobeexam i ned  in d etail  bec au se of , forexamp le , diabetic reti nopa thy, visi ble  f luo re scent imagesen sin g (here inafter ref er r e d  t o as Fluo image se ns i n g)  is perf ormed. Wh en choroidis  to  bee x amine d be c au se of ma culard eg en eration ,near-i nf rar edfluor e scen t imag e sensin g (he r einafter refer r ed to as ICGi ma g e  s e nsin g)is performe d.
O f  tho se i m ag e s e nsing s, th eI CG image sensing has a nadvant age i n that a fluo rescent ag e n t  is more  qui c kl y  circulated, a  dyna mic rangeo f a chan ge in  fluores cent inte n s ity anda v ari ati oni n  t ime are veryl a rge. 
T herefor e,in orde r t o o bta inapreferabl e imageba se don  awided ynamic r an geof  th e flu o rescen t int ensi ty ,i t i s neces s ar y that  a nexam ine rchang e ag ain  of animage pic kup elem en taccordi ng to an outp ut  signal th er efr om orf r equently  adjust a strobe scopel ight in ten sity. 
The  followin g m ethodhas been d isclos ed (s ee  Ja p a neseP a te ntAp plicationL a id- OpenNo . H0 4-18934 1). When an images ens ing mode such  as  a c o l or  im a ge sen si n g m o d e is shifted to  an ICG im ag e  s ensing mod e , b ec ause th e fluor escen t  intens ity of th e ICG ishi gh i n the  early sta ge there of, image sensi n gis pe rfo rmed w hi lestrob e scop e  em issio n is i nh ibited  with ou t any co ndition. In the later s tage,whenthe  examiner  de t erm ines that  the  strobe sc ope  em issio n i s  nece ssar y ,str o be sc opei mage sens i ng  is p er formed by t h e ope ratio n o f  a lig ht e mission inhibitio n  releasing mea ns.T h ere  ha s  bee ndisclosed a me tho do f  detecti ng  output val ues from  r e spect ive pi xels o f an im a g ep ickupelem ent  on a sca nni ng line an dca l culati ng a  s trobescopee miss i o n intensity base d ont h e res u ltto co nt rol ane miss ion intens ity of an i mage s ensi ng li ght sou rc e (see  JP -B  3056287). In the ab ove-m entione dconv ent ionalexam p l e, wh en a  p ref erable im a g es en si n g c ondi tionis  tobe set, t h e examin err equires  s kil l to sim u lt a n eously adj ust  ands e t a strobe scop e  l i ght i ntensi ty and  a gain . 
In  t he case  of t he contro l for inh i bit in g th e strobe  s cope  e mis si on when the ima ge sensi ng modei s  shift edt o th e  ICG i ma ge sensing m ode,th e re is a n adv antaget o t henon -emi ssi on o f  strobe
 improper_authentication does_not validly function. 1._Field of_the_Invention
The present_invention_relates to an_ophthalmic image sensing_apparatus including an examination_optical system for_examining_an eye to be examined and an image pickup optical system for picking up_an_image of_the_eye_to be examined.
2. Related Background_Art
In an eye fundus examination,_a color_image is acquired for diagnosis using an ophthalmic_image_sensing apparatus such_as an eye fundus camera. When ocular circulation of_blood vessels on retina and pigment_epithelium of the_retina_are_to be examined in_detail because of, for example, diabetic_retinopathy, visible fluorescent image sensing (hereinafter_referred to as Fluo image sensing) is_performed. When choroid is to be_examined because of macular degeneration,_near-infrared fluorescent_image sensing (hereinafter referred to_as ICG image_sensing) is_performed.
Of those image_sensings, the ICG image sensing has_an advantage in_that a fluorescent agent is more_quickly_circulated, a dynamic_range_of_a change_in fluorescent intensity_and_a variation_in_time are very large.
Therefore, in order_to_obtain a preferable image based on a_wide dynamic range of_the_fluorescent intensity, it is_necessary that an examiner change_a gain of an image pickup_element according_to an_output signal therefrom or frequently adjust a strobe scope light intensity.
The_following method has been disclosed (see_Japanese Patent Application Laid-Open_No. H04-189341)._When_an image sensing_mode_such as_a color image sensing mode is shifted_to an_ICG image sensing mode, because the_fluorescent intensity of the_ICG_is high in the early stage_thereof, image sensing is performed while_strobe scope emission is inhibited_without_any_condition. In the later stage,_when the examiner determines that the_strobe scope emission_is necessary, strobe scope image sensing is_performed_by the operation of a light_emission_inhibition releasing means.
There has been disclosed_a_method_of detecting output values from_respective pixels of an image pickup_element on a scanning line and calculating a strobe_scope emission intensity_based on the result to_control_an_emission intensity of an image sensing light source (see JP-B_3056287).
In the_above-mentioned conventional example,_when a preferable image sensing condition is to be set,_the examiner requires skill to simultaneously adjust_and set a strobe scope light intensity and a gain.
In the_case of the control for inhibiting the strobe_scope emission when the image sensing mode_is shifted to the_ICG_image sensing mode, there is an advantage_to_the_non-emission_of strobe