JPS627298Y2 - - Google Patents
Info
- Publication number
- JPS627298Y2 JPS627298Y2 JP1981028841U JP2884181U JPS627298Y2 JP S627298 Y2 JPS627298 Y2 JP S627298Y2 JP 1981028841 U JP1981028841 U JP 1981028841U JP 2884181 U JP2884181 U JP 2884181U JP S627298 Y2 JPS627298 Y2 JP S627298Y2
- Authority
- JP
- Japan
- Prior art keywords
- light source
- observation
- cooling fan
- halogen light
- fundus
- 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.)
- Expired
Links
- 238000001816 cooling Methods 0.000 claims description 30
- 230000003287 optical effect Effects 0.000 claims description 17
- 229910052736 halogen Inorganic materials 0.000 claims description 15
- 150000002367 halogens Chemical class 0.000 claims description 15
- 230000005284 excitation Effects 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims 2
- 230000037431 insertion Effects 0.000 claims 1
- 238000003780 insertion Methods 0.000 claims 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 210000004087 cornea Anatomy 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
Description
【考案の詳細な説明】
本考案は光学機器の光源冷却装置の改良に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a light source cooling device for optical equipment.
従来の眼底カメラ等の光学機器においては、メ
イン電源スイツチを入れると観察用光源が点灯
し、これと同時に冷却用フアンが始動回転して観
察用光源の冷却を開始するように構成されてい
た。一方、この種光学機器においては、蛍光眼底
観察などの特殊観察の時は観察光源はかなりの明
るさでなければならないが一般眼底観察などの一
般観察の時は通常の明るさであれば良いため、観
察用光源がハロゲンランプである場合は、蛍光観
察時に入力電圧を定格電圧に近い電圧にし一般観
察時に定格電圧の５割以下にしていた。ところ
が、ハロゲンランプはその入力電圧が定格電圧の
８割以上であれば寿命が延びるが、それ以下だと
管壁温度が下がり易く、例えば管壁温度が200℃
以下になるとハロゲンサイクルが行われずタング
ステンが管壁に付着して黒化することにより寿命
が短くなつてしまうという特性がある。従つて、
観察用光源の発熱量が特に大きい蛍光観察時に冷
却用フアンを稼動させておくことは望ましいが、
発熱量の小さい一般観察時にも冷却用フアンを稼
動させておくと上記理由により観察用光源の寿命
を短くしてしまうという問題があつた。又、冷却
用フアンの常時稼動による騒音、振動の問題も大
きいという欠点があつた。 In conventional optical instruments such as fundus cameras, the observation light source is turned on when the main power switch is turned on, and at the same time, the cooling fan is started and rotated to start cooling the observation light source. On the other hand, with this type of optical instrument, the observation light source must be fairly bright for special observations such as fluorescent fundus observation, but normal brightness is sufficient for general observations such as general fundus observation. When the observation light source is a halogen lamp, the input voltage is set to a voltage close to the rated voltage during fluorescence observation, and is set to 50% or less of the rated voltage during general observation. However, if the input voltage of a halogen lamp is 80% or more of the rated voltage, the lifespan of a halogen lamp will be extended, but if it is lower than that, the tube wall temperature tends to drop; for example, if the tube wall temperature reaches 200℃.
If the temperature is below, the halogen cycle will not take place and tungsten will adhere to the tube wall and turn black, resulting in a shortened lifespan. Therefore,
It is desirable to keep the cooling fan running during fluorescence observation, where the amount of heat generated by the observation light source is particularly large.
If the cooling fan is kept in operation even during general observation when the amount of heat generated is small, there is a problem in that the life of the observation light source is shortened for the above-mentioned reason. Another disadvantage is that the constant operation of the cooling fan causes large noise and vibration problems.
本考案は、上記問題点に鑑み、特殊観察時には
冷却用フアンが稼動し、一般観察時には冷却用フ
アンが停止するようにした光学機器の光源冷却装
置を提供せんとするものであるが、以下図示した
一実施例に基づきこれを説明すれば、図面は眼底
カメラの光学系を示しており、１はハロゲンラン
プ等の観察用光源、２は集光レンズ、３は観察用
光源１の結像位置に置かれたフラツシユ等の撮影
用光源、４は集光レンズ、５は観察用光源１の像
及び撮影用光源３が集光レンズ４によつて投影さ
れる位置に置かれたリングスリツト、６はリレー
レンズ、７はリングスリツト５がリレーレンズ６
により投影される位置の近くにおかれた孔明き反
射鏡、８は対物レンズ、９は対物レンズ８により
その角膜上にリング光が投影され更にその眼底が
照明される被検眼、１０はリレーレンズ、１１は
対物レンズ８、孔明き反射鏡の開口及びリレーレ
ンズ１０を順次通つてきた被検眼９の眼底像の光
路を観察系から撮影系に切換えるために撮影用光
源３がフラツシユ光を発する直前にはね上げられ
るようになつている切換え反射鏡、１２は反射
鏡、１３は接眼レンズ、１４は切換え反射鏡１１
及び反射鏡１２で順次反射された後接眼レンズ１
３を通つてきた被検眼９の眼底像を観察する検者
眼、１５は切換え反射鏡１１が点線位置にはね上
げられた時に被検眼９の眼底像が写し込まれるフ
イルム面、１６は蛍光観察時ソレノイド１７によ
つて集光レンズ４とリングスリツト５との間の位
置にて照明光路中に挿入せしめられる励起用蛍光
フイルター、１８は蛍光観察時ソレノイド１９に
よつて孔明き反射鏡７とリレーレンズ１０との間
にて観察・撮影光路中に挿入せしめられるコント
ラスト用蛍光フイルターである。又、２０は観察
用光源１の近くに配置された冷却用フアン、２１
は励起用蛍光フイルター１６の近くに配置されて
いて励起用蛍光フイルター１６が光路中に挿入せ
しめられると励起用蛍光フイルター１６によつて
作動せしめられてONとなり冷却用フアンを稼動
せしめるマイクロスイツチであつて、これらが光
源冷却装置を構成している。 In view of the above-mentioned problems, the present invention aims to provide a light source cooling device for optical instruments in which a cooling fan operates during special observation and stops during general observation. To explain this based on one embodiment, the drawing shows an optical system of a fundus camera, 1 is an observation light source such as a halogen lamp, 2 is a condenser lens, and 3 is an imaging position of the observation light source 1. 4 is a condenser lens; 5 is a ring slit placed at a position where the image of the observation light source 1 and the photographic light source 3 are projected by the condenser lens 4; 6; 7 is a relay lens, and ring slit 5 is a relay lens 6.
8 is an objective lens, 9 is an eye to be examined through which a ring light is projected onto the cornea by the objective lens 8, and the fundus of the eye is further illuminated; 10 is a relay lens. , 11 is immediately before the photographing light source 3 emits flash light in order to switch the optical path of the fundus image of the eye to be examined 9, which has passed sequentially through the objective lens 8, the aperture of the perforated reflector, and the relay lens 10, from the observation system to the photographing system. 12 is a reflector; 13 is an eyepiece; 14 is a switchable reflector 11;
and the rear eyepiece 1 which is sequentially reflected by the reflector 12.
3, the examiner's eye observes the fundus image of the subject's eye 9, 15 is a film surface on which the fundus image of the subject's eye 9 is imprinted when the switching reflector 11 is raised to the dotted line position, and 16 is a film surface during fluorescence observation. An excitation fluorescence filter is inserted into the illumination optical path at a position between the condenser lens 4 and the ring slit 5 by a solenoid 17, and a perforated reflector 7 and a relay lens 18 are inserted by a solenoid 19 during fluorescence observation. This is a contrast fluorescence filter that is inserted into the observation/photographing optical path between the camera and the camera. Further, 20 is a cooling fan disposed near the observation light source 1;
is a micro switch that is placed near the excitation fluorescence filter 16, and when the excitation fluorescence filter 16 is inserted into the optical path, it is activated by the excitation fluorescence filter 16 and turned on, operating the cooling fan. These constitute the light source cooling device.
本考案による光源冷却装置は上述の如く構成さ
れているから、一般観察の場合は励起用蛍光フイ
ルター１６は光路外におけれている。従つてマイ
クロスイツチ２１がOFFとなるので、冷却用フ
アン２０は停止し、観察用光源１の冷却は行われ
ない、従つて、観察用光源１がハロゲンランプで
あつてその入力電圧が定格電圧の５割以下であつ
たとしても管壁温度は低下せず、その結果ハロゲ
ンサイクルが円滑なまま保持されるので、管壁の
黒化が防止され寿命が大巾に延ばされる。次に、
蛍光観察になると励起用蛍光フイルター１６が光
路中に挿入される。すると、マイクロスイツチ２
１が励起用蛍光フイルター１６によつて作動せし
められてONとなるので、冷却用フアン２０は稼
動して観察用光源１を冷却する。従つて、入力電
圧の上昇により観察用光源１の発熱量が大になつ
たとしても冷却されて適当な温度に保持される。
又以上のことから明らかなように、冷却用フアン
２０が蛍光観察時のみ稼動するようになつている
ので、騒音、振動の問題は著しく改善されてい
る。 Since the light source cooling device according to the present invention is constructed as described above, the excitation fluorescence filter 16 is placed outside the optical path for general observation. Therefore, since the micro switch 21 is turned off, the cooling fan 20 is stopped and the observation light source 1 is not cooled. Therefore, if the observation light source 1 is a halogen lamp and its input voltage is below the rated voltage. Even if the temperature is less than 50%, the tube wall temperature does not drop, and as a result, the halogen cycle is maintained smoothly, preventing blackening of the tube wall and greatly extending the service life. next,
For fluorescence observation, an excitation fluorescence filter 16 is inserted into the optical path. Then, micro switch 2
1 is activated by the excitation fluorescence filter 16 and turned ON, the cooling fan 20 operates to cool the observation light source 1. Therefore, even if the amount of heat generated by the observation light source 1 increases due to an increase in input voltage, it is cooled and maintained at an appropriate temperature.
Furthermore, as is clear from the above, since the cooling fan 20 is designed to operate only during fluorescence observation, the problems of noise and vibration are significantly improved.
尚、上記実施例と異なり、冷却用フアン２０を
観察用光源１と撮影用光源３の両方に近接して配
置しても良い。又、撮影光源３からの発熱も連続
発光する場合は考慮しなければならないが、それ
は通常蛍光観察する場合に行われるのがほとんど
なので問題とはならない。又、上記実施例とは異
なり、蛍光剤注射時からの時間を測定するための
タイマーを作動させたり励起用蛍光フイルター１
６を自動的に光路中に挿入させたりする蛍光用ス
イツチ（図示されていない）がONになつた時に
冷却用フアン２０が稼動するように構成しても良
い。又、上記実施例とは異なり、観察用光源１の
入力電圧を電気的又は機械的に検知し、入力電圧
がある一定電圧以上になつた時に冷却用フアン２
０が稼動するように構成しても良い。又、観察用
光源１の近くに温度センサーを配置し、観察用光
源１付近の温度がある一定温度以上になつた時冷
却用フアン２０が稼動するように構成しても良
い。 Note that, unlike the above embodiment, the cooling fan 20 may be placed close to both the observation light source 1 and the photographing light source 3. Furthermore, heat generation from the photographing light source 3 must be taken into account when continuous light is emitted, but this is usually not a problem since it is mostly used when performing fluorescence observation. In addition, unlike the above embodiment, a timer for measuring the time from the injection of the fluorescent agent is activated, and the excitation fluorescence filter 1 is activated.
The cooling fan 20 may be configured to operate when a fluorescent switch (not shown), which automatically inserts the fluorescent lamp 6 into the optical path, is turned on. Also, unlike the above embodiment, the input voltage of the observation light source 1 is detected electrically or mechanically, and when the input voltage exceeds a certain voltage, the cooling fan 2 is activated.
The configuration may be such that 0 is activated. Alternatively, a temperature sensor may be disposed near the observation light source 1, and the cooling fan 20 may be configured to operate when the temperature near the observation light source 1 exceeds a certain temperature.
以上のように、本願考案による光源冷却装置に
よれば、光源がハロゲンランプである場合は寿命
が大巾に延ばされ、又冷却用フアンによる騒音、
振動の問題が著しく改善されるという実用上重要
な利点を有している。 As described above, according to the light source cooling device according to the present invention, when the light source is a halogen lamp, the lifespan is greatly extended, and the noise caused by the cooling fan is reduced.
This has the important practical advantage that vibration problems are significantly improved.
尚、本考案は、眼底カメラに限定されず、光源
を冷却するため冷却用フアンを備えた光学機器な
らばいずれに対しても有効である。又、光源の明
るさを広範囲で変化させる光学機器や光源として
ハロゲンランプを用いている光学機器に対しては
特に有効である。 Note that the present invention is not limited to fundus cameras, but is effective for any optical device equipped with a cooling fan for cooling a light source. Further, it is particularly effective for optical equipment that changes the brightness of the light source over a wide range or optical equipment that uses a halogen lamp as the light source.
図面は本考案による光源冷却装置の一実施例を
備えた眼底カメラの光学系を示す図である。
１……観察用光源、１６……励起用蛍光フイル
ター、２０……冷却用フアン、２１……マイクロ
スイツチ。
The drawing is a diagram showing an optical system of a fundus camera equipped with an embodiment of the light source cooling device according to the present invention. 1... Light source for observation, 16... Fluorescence filter for excitation, 20... Cooling fan, 21... Micro switch.
Claims (1)
観察・撮影又は一般観察の点灯状態かを検知す
るスイツチ（検知手段）と、該検知手段からの
信号により作動が制御される冷却用フアンとを
有し、蛍光観察・撮影状態を検知し該冷却用フ
アンを稼動してハロゲン光源を冷却すると共
に、該ハロゲン光源のハロゲンサイクルを正常
に維持することを特徴とする、眼底カメラ用ハ
ロゲン光源冷却装置。 (2) 上記冷却用フアンは励起用蛍光フイルターが
光路中に挿入する動作と連動して稼動するよう
に構成したことを特徴とする、実用新案登録請
求の範囲(1)に記載の眼底カメラ用ハロゲン光源
冷却装置。[Scope of Claim for Utility Model Registration] (1) A halogen light source for a fundus camera, a switch (detection means) that detects whether the light source is turned on for fluorescence observation/photography or general observation, and is activated by a signal from the detection means. and a cooling fan that is controlled, and detects the fluorescence observation/photographing state and operates the cooling fan to cool the halogen light source and maintain a normal halogen cycle of the halogen light source. A halogen light source cooling device for fundus cameras. (2) The fundus camera according to claim (1) of the utility model registration, characterized in that the cooling fan is configured to operate in conjunction with the insertion of the excitation fluorescence filter into the optical path. Halogen light source cooling device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1981028841U JPS627298Y2 (en) | 1981-03-02 | 1981-03-02 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1981028841U JPS627298Y2 (en) | 1981-03-02 | 1981-03-02 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57142505U JPS57142505U (en) | 1982-09-07 |
| JPS627298Y2 true JPS627298Y2 (en) | 1987-02-20 |
Family
ID=29826472
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1981028841U Expired JPS627298Y2 (en) | 1981-03-02 | 1981-03-02 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS627298Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS496034A (en) * | 1972-03-17 | 1974-01-19 | ||
| JPS5491998A (en) * | 1977-12-22 | 1979-07-20 | Star Dental Mfg Co | Light source control device for dental hand piece |
-
1981
- 1981-03-02 JP JP1981028841U patent/JPS627298Y2/ja not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS496034A (en) * | 1972-03-17 | 1974-01-19 | ||
| JPS5491998A (en) * | 1977-12-22 | 1979-07-20 | Star Dental Mfg Co | Light source control device for dental hand piece |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57142505U (en) | 1982-09-07 |
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