JPH05216140A - Optical distributor - Google Patents
Optical distributorInfo
- Publication number
- JPH05216140A JPH05216140A JP4046199A JP4619992A JPH05216140A JP H05216140 A JPH05216140 A JP H05216140A JP 4046199 A JP4046199 A JP 4046199A JP 4619992 A JP4619992 A JP 4619992A JP H05216140 A JPH05216140 A JP H05216140A
- Authority
- JP
- Japan
- Prior art keywords
- optical
- optical distributor
- total reflection
- reflection mirror
- camera
- 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
Landscapes
- Radiography Using Non-Light Waves (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は光像の光学器の分野で利
用される。本発明は、光学分配器に関し、主としてＸ線
イメージインテンシフアイア（Ｉ．Ｉ）の出力可視光像
の分配に利用できる光学分配器に関し、なお詳しくは光
電子増倍管などからの出力可視光を、上下に配置された
光学器により２つの方向に存在する画像撮像装置へ分配
させる光学分配器に関し、とくに下側に配置された光学
器の改良された構成に関する。FIELD OF THE INVENTION The present invention finds application in the field of optical image optics. The present invention relates to an optical distributor, and more particularly to an optical distributor that can be used for distributing an output visible light image of an X-ray image intensifier (II), and more specifically, to an output visible light from a photomultiplier tube or the like. The present invention relates to an optical distributor for distributing images to image pickup devices existing in two directions by vertically arranged optics, and more particularly to an improved configuration of the optics arranged below.
【０００２】[0002]
【従来の技術】図５、図６は上下に配置された光学器を
備えた従来例による光学分配器の概略縦断面図であり、
図７、図８は図５、図６のそれぞれの平面図である。2. Description of the Related Art FIGS. 5 and 6 are schematic longitudinal sectional views of an optical distributor according to a conventional example having optical devices arranged above and below,
7 and 8 are plan views of FIGS. 5 and 6, respectively.
【０００３】図示しないが、Ｘ線イメージインテンシフ
アイア（ＸＩＩ）の場合、入射窓により入射したＸ線が
変換、増倍されて出力面より可視光線が出力される。こ
の光線は図示しないコリメータレンズによりタンデム光
線（平行光線）となって光学分配器に導かれる。とくに
下側のハーフミラー１４は外部信号によってＸＩＩの出
力可視光路ないしタンデム光線路へ択一的に挿入、退避
できるようになっている。なお、１０は光学分配器の外
囲器を、Ｌｘは該可視光路ないしタンデム光路の光軸を
示している。Although not shown, in the case of the X-ray image intensifier (XII), the incident X-rays are converted and multiplied by the entrance window, and visible light is output from the output surface. This light beam is guided to an optical distributor as a tandem light beam (parallel light beam) by a collimator lens (not shown). In particular, the lower half mirror 14 can be selectively inserted into or retracted from the XII output visible light path or the tandem optical path by an external signal. Reference numeral 10 denotes an envelope of the optical distributor, and Lx denotes an optical axis of the visible light path or the tandem light path.
【０００４】図５の場合、タンデム光線は反射率Ｒ％の
ハーフミラー１４によって方向ＢへＲ％、更に上側全反
射ミラー１２によって方向Ａに（１００−Ｒ）％となる
よう分配される。In the case of FIG. 5, the tandem ray is distributed by the half mirror 14 having a reflectance of R% in the direction B by R%, and by the upper total reflection mirror 12 in the direction A by (100-R)%.
【０００５】図６の場合、タンデム光線は上方の全反射
ミラー１２により方向Ａに１００％入射するしくみにな
っている。このしくみの従来使用例としては医用のＩ．
Ｖ．Ｒ術式でのシネ映画撮影、ＤＳＡ（ディジタル・サ
ブトラクション・アンギオグラフィないし血管造影）ま
たは両者の同時収集時にＩ．Ｉからの出力光の分配器が
挙げられる。その場合、図５、図６の方向Ａに図示しな
いがＴＶカメラ（ＤＳＡ用の撮像器）、方向Ｂに図示し
ないシネカメラをそれぞれ取付け、同様に図示しないが
それぞれに結像用集光レンズが前置される。Ｘ線透視像
をＴＶモニタにて観察する場合には図６の状態に、シネ
撮影、ＤＳＡの同時収集時には図５の状態になるように
外部信号にて下側ハーフミラー１４が切り換えられるよ
うになっている。In the case of FIG. 6, 100% of the tandem rays are incident in the direction A by the upper total reflection mirror 12. An example of conventional use of this mechanism is a medical I.S.
V. In the case of cine movie shooting by R technique, DSA (digital subtraction angiography or angiography) or simultaneous acquisition of both, I.D. A distributor of the output light from I can be mentioned. In that case, a TV camera (an imager for DSA) (not shown) is attached in the direction A of FIGS. 5 and 6, and a cine camera (not shown) is attached in the direction B, respectively. Placed. When the X-ray fluoroscopic image is observed on the TV monitor, the lower half mirror 14 is switched by an external signal so that the state shown in FIG. 6 is obtained, and the state shown in FIG. Is becoming
【０００６】[0006]
【発明が解決しようとする課題】近年、ＴＶ画像の高品
位化により垂直走査線が１０００〜２０００本のＴＶ画
像が要求されている。これに伴い、ＴＶ撮像管の感度は
低下する傾向にある。In recent years, TV images with 1000 to 2000 vertical scanning lines have been required due to the high quality of TV images. Along with this, the sensitivity of the TV image pickup tube tends to decrease.
【０００７】Ｘ線Ｉ．Ｉとの組合わせの場合、被検者に
対する曝射Ｘ線量を増加させずに感度低下を補なうため
にはＩ．Ｉの輝度を高めるか、Ｉ．Ｉからの出力光の使
用効率を高めるかである。X-ray I.D. In the case of the combination with I.I., in order to compensate the sensitivity decrease without increasing the exposure X-ray dose to the subject, I.I. The brightness of I.I. It is to improve the use efficiency of the output light from I.
【０００８】前者の場合、その他の性能追求との兼ね合
いで限界がある。後者の場合、ＴＶ撮像管に前置される
前記結像用集光レンズの口径を大きくすればよいが、図
５、図６により示される分配器の場合、コリメータレン
ズからのタンデム空間距離が長くなり易いために、該レ
ンズ口径に対して一部の光線が届かないという、いわゆ
るケラレが生じることがある。結果としてＴＶモニタ像
の周辺光量低下が生じ、実使用に支障が生じる。また、
ちなみに上記感度不足を撮像管ゲインで上げることで対
抗するとＳ／Ｎの悪い像になり不都合である。In the former case, there is a limit in consideration of other performance pursuits. In the latter case, the aperture of the image forming condenser lens placed in front of the TV image pickup tube may be increased, but in the case of the distributor shown in FIGS. 5 and 6, the tandem space distance from the collimator lens is long. Since some of the light rays do not reach the lens aperture, so-called vignetting may occur. As a result, the peripheral light amount of the TV monitor image is reduced, which hinders actual use. Also,
By the way, if the insufficient sensitivity is raised by increasing the gain of the image pickup tube, an image with a poor S / N is obtained, which is inconvenient.
【０００９】本発明の目的は、光電子増倍管からの出力
可視光を、上下に配置された光学器により分配させる光
学分配器において、下側の光学器に高品位ＴＶカメラを
接続させた場合にケラレが生じることなしにこのＴＶカ
メラの結像用集光レンズ口径を大きくすることができ
る、光学分配器を提供することである。An object of the present invention is to provide an optical distributor in which visible light output from a photomultiplier tube is distributed by upper and lower optical devices, and a high-quality TV camera is connected to the lower optical device. It is an object of the present invention to provide an optical distributor capable of enlarging the diameter of the condenser lens for image formation of this TV camera without causing vignetting.
【００１０】[0010]
【課題を解決するための手段】前記した目的は、光電子
増倍管からの出力可視光を、上下に配置された光学器に
より２つの方向に存在する画像撮像装置へ分配させる光
学分配器において、上側に全反射ミラーを固定し、下側
に任意の透過率をもつハーフミラーと全反射ミラーとを
並列に配設し、これら下側の２つのミラーを前記光電子
増倍管の出力光路に択一的に挿入選択できる切替え手段
を具備することにより、達成される。The above-mentioned object is to provide an optical distributor for distributing the visible light output from the photomultiplier tube to the image pickup devices existing in two directions by the optical devices arranged above and below, A total reflection mirror is fixed on the upper side, a half mirror having an arbitrary transmittance and a total reflection mirror are arranged on the lower side in parallel, and these two lower mirrors are selected as the output optical path of the photomultiplier tube. This is achieved by providing a switching means that can be inserted and selected once.
【００１１】[0011]
【作用】図１、図２のように、下側の方向ＡにＴＶカメ
ラを、上側の方向Ｂにシネカメラを配置し、また下側に
はハーフミラーと全反射ミラーを並列に配設し、上側に
は従来例と同様の全反射ミラーを固定させる。本発明に
よれば、全反射ミラーが従来例と比較して１枚余分に必
要となるが、ＴＶカメラまでのタンデム距離が１／２程
度となるため、撮像管への集光レンズ口径が大きくでき
るため、従来と比較してＩ．Ｉからの出力光の使用効率
を高めることができる。As shown in FIGS. 1 and 2, the TV camera is arranged in the lower direction A, the cine camera is arranged in the upper direction B, and the half mirror and the total reflection mirror are arranged in parallel on the lower side. A total reflection mirror similar to the conventional example is fixed on the upper side. According to the present invention, one extra total reflection mirror is required as compared with the conventional example, but since the tandem distance to the TV camera is about 1/2, the diameter of the condenser lens to the image pickup tube is large. Therefore, the I.D. The use efficiency of the output light from I can be improved.
【００１２】[0012]
【実施例】本発明の好適な実施例は図１〜図４に基づい
て説明される。図１、図２はその１実施例を示した概略
縦断面図であり、図３、図４は図１、図２のそれぞれの
平面図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described with reference to FIGS. 1 and 2 are schematic longitudinal sectional views showing the first embodiment, and FIGS. 3 and 4 are plan views of FIGS. 1 and 2, respectively.
【００１３】これらの図面において、従来例と同様に、
１０は光学分配器の外囲器、１２は上側に配置固定され
た全反射ミラーである。In these drawings, as in the conventional example,
Reference numeral 10 is an envelope of the optical distributor, and 12 is a total reflection mirror arranged and fixed on the upper side.
【００１４】図１に示すように、方向Ａ、Ｂに分配させ
る必要がある場合には、下側においてハーフミラー１６
が使われ、任意の透過率Ｒ％を持たせる。従って、反射
率は（１００−Ｒ）％となる。これにより、上側の方向
ＢにＲ％、下側の方向Ａに（１００−Ｒ）％の可視光線
が分配される。As shown in FIG. 1, when it is necessary to distribute in the directions A and B, the half mirror 16 is placed on the lower side.
Is used to give an arbitrary transmittance R%. Therefore, the reflectance is (100-R)%. As a result, R% is distributed in the upper direction B, and (100-R)% of visible light is distributed in the lower direction A.
【００１５】また、図２に示すように、下側の方向Ａに
のみ可視光線を入射させる場合には、下側に全反射ミラ
ー１８が切替え使われる。従って、上側の方向Ｂには全
反射ミラー１２にはなんら可視光線は当らず、０％とな
る。Further, as shown in FIG. 2, when the visible light is incident only in the direction A on the lower side, the total reflection mirror 18 is switched and used on the lower side. Therefore, no visible ray hits the total reflection mirror 12 in the upper direction B, which is 0%.
【００１６】なお、これら下側の２つのミラー１６、１
８を可視光線の光軸Ｌｘに択一的に挿入、退避できる選
択切替え手段については、光学機器において慣用されて
いる公知の手段が利用される。このような切替えによる
態様例は、図１については図３により、また図２につい
ては図４によりそれぞれ明らかである。The two lower mirrors 16, 1
As the selection switching means capable of selectively inserting and retracting 8 in the optical axis Lx of the visible light, a known means commonly used in optical equipment is used. Examples of such switching aspects are apparent from FIG. 3 for FIG. 1 and FIG. 4 for FIG.
【００１７】このような構造によって、タンデム空間距
離が従来例の約半分となり、撮像管への集光効率は４倍
以上に高めることが可能になる。なお、図１〜図４のミ
ラーの代わりにプリズムを用いることもできる。With such a structure, the tandem spatial distance is about half that of the conventional example, and the light collection efficiency on the image pickup tube can be increased four times or more. A prism may be used instead of the mirrors shown in FIGS.
【００１８】[0018]
【効果】本発明により、下側にＴＶカメラを接続してお
けば、そのＴＶカメラ撮像管に周辺光量低下を生じるこ
となく充分な光量を伝達できるため、ＴＶ画面の垂直走
査線１０００〜２０００本化による感度不足を補なうこ
とができるので、撮像管のゲインを最適値に設定でき
る。これによって、Ｓ／Ｎ性能の向上が期待でき、従来
のいわゆる５００本ＴＶよりも高精細である１０００〜
２０００本ＴＶ本来の性能を引き出すことができる。[Effects] According to the present invention, if a TV camera is connected to the lower side, a sufficient amount of light can be transmitted to the TV camera image pickup tube without causing a decrease in the amount of peripheral light. Since it is possible to compensate for the lack of sensitivity due to optimization, the gain of the image pickup tube can be set to an optimum value. As a result, the S / N performance can be expected to be improved, which is higher than that of the conventional so-called 500-line TV.
2000 books The original performance of the TV can be brought out.
【００１９】[0019]
【図１】本発明の１実施例を示した２方向分配の概略縦
断面図。FIG. 1 is a schematic vertical sectional view of bidirectional distribution showing an embodiment of the present invention.
【図２】本発明の１実施例を示した１方向分配の概略縦
出面図。FIG. 2 is a schematic vertical plan view of one-way distribution showing one embodiment of the present invention.
【図３】図１の平面図。FIG. 3 is a plan view of FIG.
【図４】図２の平面図。FIG. 4 is a plan view of FIG.
【図５】従来例の２方向分配の概略縦断面図。FIG. 5 is a schematic vertical cross-sectional view of conventional bidirectional distribution.
【図６】従来例の１方向分配の概略縦断面図。FIG. 6 is a schematic vertical sectional view of one-way distribution of a conventional example.
【図７】図６の平面図。FIG. 7 is a plan view of FIG.
【図８】図７の平面図。FIG. 8 is a plan view of FIG.
１０ 外囲器 １２ 上側全反射ミラー １４ ハーフミラー １６ ハーフミラー １８ 下側全反射ミラー Ｌｘ 可視光線光軸 10 Enclosure 12 Upper Total Reflection Mirror 14 Half Mirror 16 Half Mirror 18 Lower Total Reflection Mirror Lx Visible Ray Optical Axis
Claims (1)
に配置された光学器により２つの方向に存在する画像撮
像装置へ分配させる光学分配器において、上側に全反射
ミラーが固定され、下側に任意の透過率をもつハーフミ
ラーと全反射ミラーとが並列に配設され、これら下側の
２つのミラーを前記光電子増倍管の出力光路に択一的に
挿入選択できる切替え手段を具備していることを特徴と
する、光学分配器。1. An optical distributor for distributing visible light output from a photomultiplier tube to image pickup devices existing in two directions by vertically arranged optics, and a total reflection mirror is fixed on an upper side of the optical distributor. A half mirror having a desired transmittance and a total reflection mirror are arranged in parallel on the lower side, and a switching means for selectively inserting and selecting the two lower mirrors into the output optical path of the photomultiplier tube is provided. An optical distributor, characterized by being provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4046199A JPH05216140A (en) | 1992-01-31 | 1992-01-31 | Optical distributor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4046199A JPH05216140A (en) | 1992-01-31 | 1992-01-31 | Optical distributor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05216140A true JPH05216140A (en) | 1993-08-27 |
Family
ID=12740412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4046199A Pending JPH05216140A (en) | 1992-01-31 | 1992-01-31 | Optical distributor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05216140A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013224996A (en) * | 2012-04-20 | 2013-10-31 | Seiko Epson Corp | Imaging device and method for adjusting image quality |
-
1992
- 1992-01-31 JP JP4046199A patent/JPH05216140A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013224996A (en) * | 2012-04-20 | 2013-10-31 | Seiko Epson Corp | Imaging device and method for adjusting image quality |
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