JPH04197338A - Fundus camera for fluorescent photographing - Google Patents
Fundus camera for fluorescent photographingInfo
- Publication number
- JPH04197338A JPH04197338A JP2331280A JP33128090A JPH04197338A JP H04197338 A JPH04197338 A JP H04197338A JP 2331280 A JP2331280 A JP 2331280A JP 33128090 A JP33128090 A JP 33128090A JP H04197338 A JPH04197338 A JP H04197338A
- Authority
- JP
- Japan
- Prior art keywords
- fluorescence
- fluorescent light
- visible
- photography
- infrared
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000003287 optical effect Effects 0.000 claims abstract description 55
- 230000004888 barrier function Effects 0.000 claims abstract description 27
- 230000005540 biological transmission Effects 0.000 claims abstract description 6
- 238000005286 illumination Methods 0.000 claims description 37
- 230000005284 excitation Effects 0.000 claims description 26
- 238000003384 imaging method Methods 0.000 claims description 10
- 238000000926 separation method Methods 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 7
- 238000002073 fluorescence micrograph Methods 0.000 description 6
- 229910052724 xenon Inorganic materials 0.000 description 6
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 6
- 239000007850 fluorescent dye Substances 0.000 description 3
- 229910052736 halogen Inorganic materials 0.000 description 3
- 150000002367 halogens Chemical class 0.000 description 3
- 201000010099 disease Diseases 0.000 description 2
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 210000003161 choroid Anatomy 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 210000001525 retina Anatomy 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Optical Filters (AREA)
- Eye Examination Apparatus (AREA)
Abstract
Description
本発明は、可視蛍光撮影と赤外蛍光撮影とを同時に行う
ことのできる蛍光撮影用眼底カメラに関する。The present invention relates to a fundus camera for fluorescence photography that can simultaneously perform visible fluorescence photography and infrared fluorescence photography.
従来から、眼底カメラには、可視カラー撮影、可視蛍光
撮影を行うことのできる構成のものが知られている。ま
た、特開平１−３００９２６号公報には、−台で可視カ
ラー撮影、可視蛍光撮影、赤外蛍光撮影に兼用できる眼
底カメラが開示されている。BACKGROUND OF THE INVENTION Conventionally, fundus cameras having a configuration capable of performing visible color photography and visible fluorescence photography are known. Further, Japanese Patent Laid-Open No. 1-300926 discloses a fundus camera that can be used for visible color photography, visible fluorescence photography, and infrared fluorescence photography.
しかしながら、従来の眼底カメラでは、−台で可視カラ
ー撮影、可視蛍光撮影、赤外蛍光撮影を行うことができ
るといっても、専用の眼底カメラと同様で、可視蛍光撮
影と赤外蛍光撮影とを連続しであるいは同時に行うこと
ができず、網膜上の疾患検査と脈絡膜上の疾患検査とを
行う場合に、−度に検査をできない不都合があった。
そこで、本発明の目的は、可視蛍光撮影と赤外蛍光撮影
とを同時に行うことのできる蛍光撮影用眼底カメラを提
供することにある。However, although conventional fundus cameras can perform visible color photography, visible fluorescence photography, and infrared fluorescence photography on a single unit, they are similar to dedicated fundus cameras; Therefore, when testing for diseases on the retina and diseases on the choroid, there was a problem in that the tests could not be performed at the same time. SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a fundus camera for fluorescence photography that can simultaneously perform visible fluorescence photography and infrared fluorescence photography.
本発明に係わる蛍光撮影用眼底カメラは、上記の課題を
解決するために、可視蛍光撮影用励起照明光と赤外蛍光
撮影用励起照明光との双方を透過させる透過特性を有す
るエキサイタ−フィルターを照明光学系に設け、可視蛍
光撮影用励起照明光によって励起された可視蛍光と赤外
蛍光撮影用励起照明光によって励起された赤外蛍光との
双方を透過させる透過特性を有するバリアフィルターを
撮影光学系に設けると共に、該撮影光学系には可視蛍光
と赤外蛍光とを分離して各撮像面に導く分離部材を設け
たことを特徴とする。In order to solve the above-mentioned problems, the fundus camera for fluorescence photography according to the present invention includes an exciter filter having a transmission characteristic that transmits both the excitation illumination light for visible fluorescence photography and the excitation illumination light for infrared fluorescence photography. A barrier filter is installed in the illumination optical system and has a transmission characteristic that transmits both visible fluorescence excited by the excitation illumination light for visible fluorescence photography and infrared fluorescence excited by the excitation illumination light for infrared fluorescence photography. The imaging optical system is also provided with a separation member that separates visible fluorescence and infrared fluorescence and guides them to each imaging surface.
本発明に係わる蛍光撮影用眼底カメラによれば、可視蛍
光用励起照明光と赤外蛍光用励起照明光とがエキサイタ
−フィルターを通過して眼底に導かれる。可視蛍光用励
起照明光によって励起される蛍光剤はこの可視蛍光用励
起照明光によって可視蛍光を発し、赤外蛍光用励起照明
光によって励起される蛍光剤はこの赤外蛍光用励起照明
光によって赤外蛍光を発する。これらの蛍光は、共にバ
リアフィルターを通過して分離部材に導かれる。その分
離部材は可視蛍光と赤外蛍光とを分離し、可視蛍光と赤
外蛍光と゛は各別に撮像面に導かれ、各撮像面には可視
蛍光に基づく眼底像と赤外蛍光に基づく眼底像とが形成
される。According to the fundus camera for fluorescence photography according to the present invention, excitation illumination light for visible fluorescence and excitation illumination light for infrared fluorescence are guided to the fundus through an exciter filter. Fluorescent agents excited by the excitation illumination light for visible fluorescence emit visible fluorescence by the excitation illumination light for visible fluorescence, and fluorescent agents excited by the excitation illumination light for infrared fluorescence emit red light by the excitation illumination light for infrared fluorescence. Emits extrafluorescence. Both of these fluorescent lights pass through the barrier filter and are guided to the separation member. The separation member separates visible fluorescence and infrared fluorescence, and the visible fluorescence and infrared fluorescence are guided separately to the imaging plane, and each imaging plane has a fundus image based on visible fluorescence and a fundus image based on infrared fluorescence. is formed.
第１図は本発明に係わる蛍光撮影用眼底カメラの第１実
施例を示し、第１図において、１は照明光学系、２は撮
影光学系である。照明光学系１はハロゲンランプ３、キ
セノン管４、集光レンズ５．６、励起照明用エキサイタ
−フィルター７、リング状絞り８、反射ミラー９、リレ
ーレンズ１０１ 孔空きミラー１１から大略構成され
る。ハロゲンランプ３とキセノン管４とは集光レンズ５
に関して共役である。励起照明用エキサイタ−フィルタ
ー７は第３図に示すように波長路４００ｎｍから略５２
０ｎｍの可視蛍光用励起照明光と波長路７００ｎｍから
略８２０ｎｍの赤外蛍光用励起照明光とを透過させる透
過特性を有する。
ハロゲンランプ３は観察照明用に用いられ、キセノン管
４は撮影照明用に用いられている。可視蛍光用励起照明
光と赤外蛍光用励起照明光とは集光レンズ６により集光
され、励起照明用エキサイタ−フィルター７、リング状
絞り８、反射ミラー９、リレーレンズ１０、孔空きミラ
ー１１、対物レンズ１２を経由して被検眼１３の眼底Ｒ
に導かれ、眼底Ｒが照明される。
撮影光学系２は、可視蛍光・赤外蛍光両用バリアフィル
ター１４、可視蛍光用バリアフィルター１５、赤外蛍光
用バリアフィルター１６、合焦レンズ１７、結像レンズ
１７′、倍率補正レンズ１８、分割プリズム１９、撮影
フィルム２０を有する。可視蛍光・赤外蛍光両用バリア
フィルター１４は、第３図に示すように波長路５２０ｎ
ｍから略６００ｎｍの可視蛍光と波長路８２０ｎｍから
略９００ｎｍの赤外蛍光とを透過させる波長特性を有す
る。可視蛍光バリアフィルター１５は第５図に示すよう
に波長路５２０ｎｍから略６００ｎｍの可視蛍光を透過
させる波長特性、赤外蛍光用バリアフィルター１６は第
６図に示すように波長路８２０ｎｍから略９００ｎｍの
赤外蛍光を透過させる波長特性を有する。
倍率補正レンズ１８はカラー撮影と蛍光撮影とでの倍率
を補正するために用いる。
励起照明用エキサイタ−フィルター７、可視蛍光・赤外
蛍光両用バリアフィルター１４、可視蛍光用バリアフィ
ルター１５、赤外蛍光用バリアフィルター１６、倍率補
正レンズ１８、分割プリズム１９は、モノクロ撮影、カ
ラー撮影のときには、照明光学系１、撮影光学系２の各
光路から退避されている。
可視蛍光撮影のみを行うときには、照明光学系１の光路
に励起照明用エキサイタ−フィルター７が挿入され、撮
影光学系２の光路に可視蛍光用バリアフィルター１５が
挿入され、可視蛍光・赤外蛍光両用バリアフィルター１
４、赤外蛍光用バリアフィルター１６、倍率補正レンズ
１８、分割プリズム１９は撮影光学系２の光路から退避
されている。赤外蛍光撮影のみを行うときには、照明光
学系１の光路に励起照明用エキサイターフィルター７が
挿入され、撮影光学系２の光路に赤外蛍光用バリアフィ
カラー１６が挿入され、可視蛍光・赤外蛍光両用バリア
フィルター１４、可視蛍光用バリアフィルター１５、倍
率補正レンズ１８、分割プリズム１９は撮影光学系２の
光路から退避されている。可視蛍光撮影・赤外蛍光撮影
の双方を同時に行うときには、照明光学系１の光路に励
起照明用エキサイタ−フィルター７が挿入され、可視蛍
光・赤外蛍光両用バリアフィルター１４、倍率補正レン
ズ１８、分割プリズム１９が撮影光学系２の光路に挿入
される。
ここでは、可視蛍光撮影・赤外蛍光撮影を同時に行うも
のとして説明する。
眼底Ｒの可視蛍光、赤外蛍光は対物レンズを介して孔空
きミラー１１の孔部２１を通過し、可視蛍光・赤外蛍光
両用バリアフィルター１４を透過して合焦レンズ１７、
結像レンズ１７′、倍率補正レンズ１８を経由して分割
プリズム１９に導かれる。分割プリズム１９は可視蛍光
と赤外蛍光とを分離する分離部材として機能し、反射面
２２を有する。反射面２２は第７図に示すように波長８
２０ｎｍ以下の波長域の光を透過し、波長８２０ｎｍ以
上の波長域の光を反射する機能を有する。この分割プリ
ズム１９は立方体形状とされ、可視蛍光と赤外蛍光とを
分離する機能を有する。
分割プリズム１９の反射面２２を通過した可視蛍光は、
フィルム２０に結像される。その反射面２２で反射され
た赤外蛍光は二等辺三角形状のプリズムの反射面２３で
反射され、同様にＣＣＤ２０に結像される。
ここで、赤外蛍光は分割プリズム１９からなる物質の中
を可視蛍光に較べて長く経由することになるために、分
割プリズム１９の入射点ＰからＣＣＤ２０の撮像面Ｆま
での光学距離が可視蛍光と赤外蛍光とで異なることにな
る。この光学距離を補正するために、赤外蛍光の出射側
には、光路長補正部材２４が設けられている。
その分割プリズム１９の長さをａｌ 光路長補正部材
２４の長さをＫａ、 光路長補正部材２４、分割プリ
ズム１９のガラス材料としてＢＫ７を用いるものとする
と、その屈折率ｎはｎ ＝１． ５１８３３であるので
、以下の関係式からに＝１． ９３７となり、分割プリ
ズム１９の全長のＬ ９３７倍の長さの光路長補正部
材２４を設ければよい。
入射中心点Ｐから反射中心点Ｑ、 Ｓを経由して出射
中心点Ｔまでの光学距離ＰＱＳＴは、点０１点８間の距
離をａとすると、
Ｐ Ｑ Ｓ Ｔ ＝ ａ ／ ｎ ＋ ａ ／ ｎ ＋
Ｋ ａ ／ ｎ −（１）入射中心点Ｐから反射中心
点Ｑを経由して出射中心点Ｔに相当する光軸上の点Ｒま
での光学距離ＰＱＲは、
Ｐ Ｑ Ｒ＝ ａ ／ ｎ 十Ｋ ａ −（２）上記の
（１）、 （２）式から、
ｎ＝（１＋Ｋ）／に
の関係式が得られ、この式を解くことによって、Ｋの値
が求められる。
このようにして、ＣＣＤ２０には第８図に示すように可
視蛍光に基づく眼底像２５と赤外蛍光に基づく眼底像２
６とが同時に形成されることになる。
なお、可視カラー撮影、可視蛍光撮影、赤外蛍光撮影を
単独で個別に行うモードが選択されたときには、撮影光
学系２の分割プリズム１９の位置に光軸シフト用光学部
材が挿入され、可視カラー像、可視蛍光像、赤外蛍光像
がＣＣＤ２０の中央部に結像される。
以上第１実施例では、カラー、可視蛍光、赤外蛍光を選
択して行うことができる眼底カメラについて説明したが
、第９図に示すように交差反射面２７．２８を有する分
割プリズム１９を用い、各ミラー２９．３０で反射させ
てＣＣＤ２０に導き、可視蛍光撮影と赤外蛍光撮影のみ
を同時に行う構成とすることもでき、この場合には可視
カラー撮影を行わないので、倍率補正レンズ１８は不要
である。なお、反射面２９とＣＣＤ２０との間には、光
路長補正部材３１が挿入される。
第１０図は本発明に係わる蛍光撮影用眼底カメラの第２
実施例を示し、撮影スイッチ３２を１回操作すると、可
視蛍光撮影と赤外蛍光撮影とが連続して行われるように
制御回路３３を構成したもので、撮影スイッチ３２をオ
ンすると制御回路３３が発光回路３４を可視蛍光撮影に
応じた発光量でキセノン管４が発光されるように制御す
る。同時に、撮影光学系２の光路に可視蛍光用バリアフ
ィルター１５が挿入されると共に、光路長補正部材３５
が挿入される。眼底Ｒからの可視蛍光像はＣＣＤ２０に
結像され、そのＣＣＤ２０の信号出力は画像処理装置３
６を介して第１記録手段３７に入力され、可視蛍光像が
記録される。
制御回路３３は続けて発光回路３４を赤外蛍光撮影に応
じた発光量でキセノン管４が発光されるように制御する
。一方、撮影光学系２の光路から可視蛍光撮影用バリア
フィルター１５が退避され、赤外蛍光撮影用バリアフィ
ルター１６が挿入される。この赤外蛍光撮影用バリアフ
ィルター１６の挿入に連動して光路長補正部材３８が撮
影光学系２の光路に挿入される。制御回路３３はキセノ
ン管４を続けて発光させるときに、切替えスイッチ３９
を第２記録手段４０の側に切り換える。これによって、
Ｃ０Ｄ２０の信号出力は画像処理装置３６を介して第２
記録手段４０に入力され、赤外蛍光像が記録される。
その可視蛍光像、眼底像は再生スイッチ４１を操作する
ことによりＴＶモニター４２に表示することができる。
なお、１個の画像記録手段の番地を１分して可視蛍光像
と赤外蛍光像とを記録するようにしてもよい。
この第２実施例によれば、光路分割は不要となる。FIG. 1 shows a first embodiment of a fundus camera for fluorescence photography according to the present invention. In FIG. 1, 1 is an illumination optical system, and 2 is a photographing optical system. The illumination optical system 1 is roughly composed of a halogen lamp 3, a xenon tube 4, a condenser lens 5.6, an exciter filter 7 for excitation illumination, a ring-shaped diaphragm 8, a reflection mirror 9, a relay lens 101, and a perforated mirror 11. The halogen lamp 3 and the xenon tube 4 are the condensing lens 5
is conjugate with respect to As shown in FIG. 3, the exciter filter 7 for excitation illumination is arranged to
It has a transmission characteristic that allows excitation illumination light for visible fluorescence of 0 nm and excitation illumination light for infrared fluorescence of wavelength path from 700 nm to approximately 820 nm to pass through. The halogen lamp 3 is used for observation illumination, and the xenon tube 4 is used for photography illumination. The excitation illumination light for visible fluorescence and the excitation illumination light for infrared fluorescence are condensed by a condenser lens 6, which includes an exciter filter 7 for excitation illumination, a ring-shaped diaphragm 8, a reflection mirror 9, a relay lens 10, and a perforated mirror 11. , the fundus R of the eye to be examined 13 via the objective lens 12
, and the fundus R is illuminated. The photographing optical system 2 includes a barrier filter 14 for both visible fluorescence and infrared fluorescence, a barrier filter 15 for visible fluorescence, a barrier filter 16 for infrared fluorescence, a focusing lens 17, an imaging lens 17', a magnification correction lens 18, and a splitting prism. 19, it has a photographic film 20. The barrier filter 14 for both visible fluorescence and infrared fluorescence has a wavelength path 520n as shown in FIG.
It has a wavelength characteristic that transmits visible fluorescence of about 600 nm from m and infrared fluorescence of about 900 nm from a wavelength path of 820 nm. As shown in FIG. 5, the visible fluorescence barrier filter 15 has a wavelength characteristic of transmitting visible fluorescence in a wavelength path of 520 nm to approximately 600 nm, and the infrared fluorescence barrier filter 16 has a wavelength characteristic of transmitting visible fluorescence in a wavelength path of 820 nm to approximately 900 nm as shown in FIG. It has wavelength characteristics that allow infrared fluorescence to pass through. The magnification correction lens 18 is used to correct the magnification in color photography and fluorescence photography. The exciter filter 7 for excitation illumination, the barrier filter 14 for both visible fluorescence and infrared fluorescence, the barrier filter 15 for visible fluorescence, the barrier filter 16 for infrared fluorescence, the magnification correction lens 18, and the splitting prism 19 are used for monochrome photography and color photography. Sometimes, it is evacuated from each optical path of the illumination optical system 1 and the photographing optical system 2. When only visible fluorescence photography is performed, an excitation illumination exciter filter 7 is inserted into the optical path of the illumination optical system 1, and a visible fluorescence barrier filter 15 is inserted into the optical path of the imaging optical system 2, so that it can be used for both visible fluorescence and infrared fluorescence. Barrier filter 1
4. The infrared fluorescence barrier filter 16, the magnification correction lens 18, and the splitting prism 19 are retracted from the optical path of the photographing optical system 2. When performing only infrared fluorescence photography, an exciter filter 7 for excitation illumination is inserted into the optical path of the illumination optical system 1, and a barrier filter 16 for infrared fluorescence is inserted into the optical path of the imaging optical system 2. The dual fluorescence barrier filter 14, the visible fluorescence barrier filter 15, the magnification correction lens 18, and the splitting prism 19 are retracted from the optical path of the photographing optical system 2. When performing both visible fluorescence photography and infrared fluorescence photography at the same time, an exciter filter 7 for excitation illumination is inserted into the optical path of the illumination optical system 1, and a barrier filter 14 for both visible fluorescence and infrared fluorescence, a magnification correction lens 18, and a division A prism 19 is inserted into the optical path of the photographic optical system 2. Here, the explanation will be given assuming that visible fluorescence photography and infrared fluorescence photography are performed simultaneously. Visible fluorescence and infrared fluorescence of the fundus R pass through the hole 21 of the perforated mirror 11 via the objective lens, pass through the barrier filter 14 for both visible fluorescence and infrared fluorescence, and pass through the focusing lens 17,
The light is guided to a dividing prism 19 via an imaging lens 17' and a magnification correction lens 18. The splitting prism 19 functions as a separating member that separates visible fluorescence and infrared fluorescence, and has a reflective surface 22. The reflective surface 22 has a wavelength of 8 as shown in FIG.
It has a function of transmitting light in a wavelength range of 20 nm or less and reflecting light in a wavelength range of 820 nm or more. This dividing prism 19 has a cubic shape and has a function of separating visible fluorescence and infrared fluorescence. The visible fluorescence that has passed through the reflective surface 22 of the splitting prism 19 is
The image is formed on the film 20. The infrared fluorescence reflected by the reflecting surface 22 is reflected by the reflecting surface 23 of the isosceles triangular prism, and is similarly imaged on the CCD 20. Here, since the infrared fluorescence passes through the substance made of the splitting prism 19 for a longer time than the visible fluorescence, the optical distance from the incident point P of the splitting prism 19 to the imaging surface F of the CCD 20 is longer than the visible fluorescence. and infrared fluorescence. In order to correct this optical distance, an optical path length correction member 24 is provided on the infrared fluorescence emission side. Assuming that the length of the splitting prism 19 is al, the length of the optical path length correction member 24 is Ka, and BK7 is used as the glass material of the optical path length correction member 24 and the splitting prism 19, the refractive index n is n=1. 51833, so from the following relational expression, =1. 937, and the optical path length correction member 24 having a length L 937 times the total length of the splitting prism 19 may be provided. The optical distance PQST from the incident center point P to the output center point T via the reflection center points Q and S is, where a is the distance between points 01 and 8, P QST = a / n + a / n +
K a / n - (1) The optical distance PQR from the incident center point P via the reflection center point Q to the point R on the optical axis corresponding to the output center point T is P Q R = a / n 10 K a - (2) From the above equations (1) and (2), the relational expression n=(1+K)/ is obtained, and by solving this equation, the value of K is obtained. In this way, the CCD 20 displays a fundus image 25 based on visible fluorescence and a fundus image 2 based on infrared fluorescence, as shown in FIG.
6 will be formed at the same time. Note that when a mode in which visible color photography, visible fluorescence photography, and infrared fluorescence photography are performed independently and individually is selected, an optical axis shifting optical member is inserted at the position of the splitting prism 19 of the photographing optical system 2, and the visible color photography is performed. A visible fluorescence image and an infrared fluorescence image are formed at the center of the CCD 20. In the first embodiment, a fundus camera that can selectively perform color, visible fluorescence, and infrared fluorescence has been described, but as shown in FIG. It is also possible to have a configuration in which only visible fluorescence photography and infrared fluorescence photography are performed at the same time by being reflected by each mirror 29, 30 and guided to the CCD 20. In this case, since visible color photography is not performed, the magnification correction lens 18 is Not necessary. Note that an optical path length correction member 31 is inserted between the reflective surface 29 and the CCD 20. FIG. 10 shows a second view of the fundus camera for fluorescence photography according to the present invention.
In this example, the control circuit 33 is configured so that visible fluorescence photography and infrared fluorescence photography are performed continuously when the photography switch 32 is operated once.When the photography switch 32 is turned on, the control circuit 33 is The light emitting circuit 34 is controlled so that the xenon tube 4 emits light at an amount of light corresponding to visible fluorescence photography. At the same time, the visible fluorescence barrier filter 15 is inserted into the optical path of the photographing optical system 2, and the optical path length correction member 35
is inserted. The visible fluorescence image from the fundus R is formed on the CCD 20, and the signal output from the CCD 20 is sent to the image processing device 3.
6 to the first recording means 37, and a visible fluorescence image is recorded. The control circuit 33 then controls the light emitting circuit 34 so that the xenon tube 4 emits light at an amount of light corresponding to infrared fluorescence photography. On the other hand, the barrier filter 15 for visible fluorescence photography is retracted from the optical path of the photography optical system 2, and the barrier filter 16 for infrared fluorescence photography is inserted. In conjunction with the insertion of the barrier filter 16 for infrared fluorescence photography, the optical path length correction member 38 is inserted into the optical path of the photographing optical system 2. The control circuit 33 switches the changeover switch 39 when the xenon tube 4 continues to emit light.
is switched to the second recording means 40 side. by this,
The signal output of C0D20 is sent to the second
The light is input to the recording means 40, and an infrared fluorescence image is recorded. The visible fluorescence image and fundus image can be displayed on the TV monitor 42 by operating the playback switch 41. Note that a visible fluorescent image and an infrared fluorescent image may be recorded by dividing the address of one image recording means into one minute. According to this second embodiment, optical path division is not necessary.
本発明に係わる眼底カメラでは、以上説明したように構
成したので、可視蛍光撮影と赤外蛍光撮影とを同時に行
うことができるという効果を奏する。Since the fundus camera according to the present invention is configured as described above, it has the effect of being able to perform visible fluorescence photography and infrared fluorescence photography at the same time.
第１図は本発明に係わる蛍光撮影用眼底カメラの第１実
施例の光学系図、
第２図は第１図の矢視Ｘ図、
第３図ないし第６図は各フィルターの波長特性図、
第７図は第１図に示す分割プリズムの反射面の波長特性
図、
第８図はＣＯＤに同時に形成された眼底像を示す図、第
９図は第１図に示す蛍光撮影用眼底カメラの変形例を示
す部分図、
第１０図は本発明に係わる蛍光撮影用眼底カメラの第２
実施例の光学系図、
である。
１・・・照明光学系
２・・・撮影光学系
７・・・エキサイタ−フィルター
１４・・・バリアフィルター
１９・・・分割プリズム（分離部材）
−１３＝FIG. 1 is an optical system diagram of a first embodiment of a fundus camera for fluorescence photography according to the present invention, FIG. 2 is a diagram viewed from the arrow X in FIG. 1, and FIGS. 3 to 6 are wavelength characteristic diagrams of each filter. Figure 7 is a wavelength characteristic diagram of the reflective surface of the splitting prism shown in Figure 1, Figure 8 is a diagram showing the fundus image simultaneously formed on the COD, and Figure 9 is a diagram of the fundus camera for fluorescence photography shown in Figure 1. A partial view showing a modified example, FIG. 10 is a second view of the fundus camera for fluorescence photography according to the present invention.
This is an optical system diagram of the example. 1...Illumination optical system 2...Photographing optical system 7...Exciter filter 14...Barrier filter 19...Dividing prism (separation member) -13=
Claims (2)
照明光との双方を透過させる透過特性を有するエキサイ
ターフィルターが照明光学系に設けられ、可視蛍光撮影
用励起照明光によつて励起された可視蛍光と赤外蛍光撮
影用励起照明光によつて励起された赤外蛍光との双方を
透過させる透過特性を有するバリアフィルターが撮影光
学系に設けられると共に、該撮影光学系には可視蛍光と
赤外蛍光とを分離して各撮像面に導く分離部材が設けら
れていることを特徴とする蛍光撮影用眼底カメラ。(1) An exciter filter having transmission characteristics that transmits both the excitation illumination light for visible fluorescence photography and the excitation illumination light for infrared fluorescence photography is provided in the illumination optical system, and is excited by the excitation illumination light for visible fluorescence photography. The photographing optical system is provided with a barrier filter having a transmission characteristic that transmits both the visible fluorescence excited by the excitation illumination light for infrared fluorescence photography and the infrared fluorescence excited by the excitation illumination light for infrared fluorescence photography. A fundus camera for fluorescence photography, characterized by being provided with a separation member that separates fluorescence and infrared fluorescence and guides them to each imaging surface.
を連続して行うことができることを特徴とする蛍光撮影
用眼底カメラ。(2) A fundus camera for fluorescence photography, which is capable of continuously performing visible fluorescence photography and infrared fluorescence photography in a single photography operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2331280A JPH04197338A (en) | 1990-11-29 | 1990-11-29 | Fundus camera for fluorescent photographing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2331280A JPH04197338A (en) | 1990-11-29 | 1990-11-29 | Fundus camera for fluorescent photographing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04197338A true JPH04197338A (en) | 1992-07-16 |
Family
ID=18241923
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2331280A Pending JPH04197338A (en) | 1990-11-29 | 1990-11-29 | Fundus camera for fluorescent photographing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04197338A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0910179A (en) * | 1995-06-30 | 1997-01-14 | Canon Inc | Eyegrounds inspecting instrument |
| JPH0910180A (en) * | 1995-06-30 | 1997-01-14 | Canon Inc | Eyegrounds inspecting instrument |
| WO2016136858A1 (en) * | 2015-02-27 | 2016-09-01 | 興和株式会社 | Fundus photography system |
-
1990
- 1990-11-29 JP JP2331280A patent/JPH04197338A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0910179A (en) * | 1995-06-30 | 1997-01-14 | Canon Inc | Eyegrounds inspecting instrument |
| JPH0910180A (en) * | 1995-06-30 | 1997-01-14 | Canon Inc | Eyegrounds inspecting instrument |
| WO2016136858A1 (en) * | 2015-02-27 | 2016-09-01 | 興和株式会社 | Fundus photography system |
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