JPH06331940A - Optical monitoring device - Google Patents
Optical monitoring deviceInfo
- Publication number
- JPH06331940A JPH06331940A JP5121045A JP12104593A JPH06331940A JP H06331940 A JPH06331940 A JP H06331940A JP 5121045 A JP5121045 A JP 5121045A JP 12104593 A JP12104593 A JP 12104593A JP H06331940 A JPH06331940 A JP H06331940A
- Authority
- JP
- Japan
- Prior art keywords
- plate
- light
- filter plate
- polarization
- ratio
- 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.)
- Granted
Links
Landscapes
- Optical Couplings Of Light Guides (AREA)
- Light Receiving Elements (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、主光路中に透過光と反
射光とに所望の比率で分岐する分岐板を配置し、分岐板
の反射光を受光素子で受光し計測して、主光路の光強度
をモニターする光モニタ装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention arranges a branch plate for branching transmitted light and reflected light at a desired ratio in a main optical path, receives the reflected light of the branch plate with a light receiving element, and measures it. The present invention relates to an optical monitor device that monitors the light intensity of an optical path.
【０００２】[0002]
【従来の技術】図４は従来の光モニタ装置の構成図であ
る。図において、５は、例えばガラス板の表面に、屈折
率が異なる誘電体膜を交互に多層に形成した分岐板であ
る。2. Description of the Related Art FIG. 4 is a block diagram of a conventional optical monitor device. In the figure, reference numeral 5 is a branch plate in which dielectric films having different refractive indexes are alternately formed in multiple layers on the surface of a glass plate, for example.
【０００３】この分岐板５は、透過率と反射率との比
を、例えば９対１としたものである。一方、光強度をモ
ニタすべき主光路は、入力側光ファイバ１と出力側光フ
ァイバ２とを対向配置し、入力側光ファイバ１の出射端
面側に出射光を平行光にするレンズ３を配置し、一方出
力側光ファイバ２の入射端面側に、その平行光を出力側
光ファイバ２の入射端面に集光するレンズ４を設置して
構成されている。The branch plate 5 has a transmittance and reflectance ratio of 9: 1, for example. On the other hand, in the main optical path for which the light intensity is to be monitored, the input side optical fiber 1 and the output side optical fiber 2 are arranged so as to face each other, and the lens 3 for making the emitted light parallel light is arranged on the emission end face side of the input side optical fiber 1. On the other hand, a lens 4 for condensing the parallel light on the incident end surface of the output side optical fiber 2 is installed on the side of the incident end surface of the output side optical fiber 2.
【０００４】そして、レンズ３とレンズ４との間に、主
光路の光軸に45度傾斜するよう分岐板５を設置し、分岐
板５の反射光の光軸上にレンズ６を設置し、さらにレン
ズ６の後方に受光素子７を設置している。A branch plate 5 is installed between the lens 3 and the lens 4 so as to be inclined at 45 degrees with respect to the optical axis of the main optical path, and a lens 6 is installed on the optical axis of the reflected light of the branch plate 5. Further, a light receiving element 7 is installed behind the lens 6.
【０００５】したがって、入力側光ファイバ１の出射光
の大部分は分岐板５を透過して出力側光ファイバ２に伝
達される。そして、入力側光ファイバ１の出射光の一部
が分岐板５により反射され、レンズ６により集光されて
受光素子７の受光面に投射され、光・電変換され受光素
子７の電気的出力となる。Therefore, most of the light emitted from the input side optical fiber 1 passes through the branch plate 5 and is transmitted to the output side optical fiber 2. Then, a part of the light emitted from the input-side optical fiber 1 is reflected by the branch plate 5, condensed by the lens 6 and projected on the light-receiving surface of the light-receiving element 7, photoelectrically converted into electrical output of the light-receiving element 7. Becomes
【０００６】したがって、受光素子７の出力を計測する
ことで、主光路の光強度をモニターすることができる。Therefore, the light intensity of the main optical path can be monitored by measuring the output of the light receiving element 7.
【０００７】[0007]
【発明が解決しようとする課題】ところで、偏光が屈折
率が異なる境界面に入射すると、透過率及び反射率がＳ
偏光とＰ偏光とでは異なることは、図５に図示したよう
に公知のことである。By the way, when polarized light is incident on a boundary surface having a different refractive index, the transmittance and the reflectance are S.
The difference between the polarized light and the P-polarized light is known as shown in FIG.
【０００８】図５において、実線で示すＳT はＳ偏光の
透過率、一点鎖線で示すＰT はＰ偏光の透過率、実線で
示すＳR はＳ偏光の反射率、一点鎖線で示すＰR はＰ偏
光の反射率を示す。In FIG. 5, S T shown by a solid line is the transmittance of S-polarized light, P T shown by a chain line is a transmittance of P-polarized light, S R shown by a solid line is the reflectance of S-polarized light, and P R is shown by a chain line. Indicates the reflectance of P-polarized light.
【０００９】したがって、従来構造の光モニター装置に
おいても、分岐板での反射光は、Ｓ偏光（入射光の電界
が入射面に垂直の偏光）とＰ偏光（入射光の電界が入射
面に平行の偏光）とでは異なり、Ｓ偏光の光強度がＰ偏
光の光強度よりも強い。Therefore, even in the optical monitor device having the conventional structure, the light reflected by the branch plate is S-polarized (the electric field of the incident light is perpendicular to the incident surface) and P-polarized (the electric field of the incident light is parallel to the incident surface). Light intensity of S-polarized light is stronger than that of P-polarized light.
【００１０】このように従来の光モニター装置は、偏光
依存性を有し、モニターの信頼度が低いという問題点が
あった。本発明はこのような点に鑑みて創作されたもの
で、偏光依存性が殆どなくて、信頼度が高い光モニター
装置を提供することを目的としている。As described above, the conventional optical monitor device has a problem that it has polarization dependency and the reliability of the monitor is low. The present invention was created in view of the above circumstances, and it is an object of the present invention to provide an optical monitor device having almost no polarization dependence and high reliability.
【００１１】[0011]
【課題を解決するための手段】上記の目的を達成するた
めに本発明は、図１に例示したように、透過光と反射光
とに所望の比率で分岐する分岐板を主光路の光軸上に配
置し、分岐板の反射光を受光素子で受光する構成の光モ
ニター装置において、Ｐ偏光透過率とＳ偏光透過率の比
が、分岐板５のＳ偏光反射率とＰ偏光反射率の比に等し
いか又はほぼ等しいフィルタ板10を、分岐板５と受光素
子７との間に挿入配置した構成とする。In order to achieve the above object, the present invention provides a branching plate for branching transmitted light and reflected light at a desired ratio, as illustrated in FIG. In the optical monitor device arranged above and configured to receive the reflected light of the branching plate with the light receiving element, the ratio of the P-polarized light transmittance and the S-polarized light transmittance is the S-polarized light reflectance and the P-polarized light reflectance of the branching plate 5. A filter plate 10 having a ratio equal to or substantially equal to the ratio is inserted and arranged between the branch plate 5 and the light receiving element 7.
【００１２】また、分岐板５の反射光の入射角を可変し
得るよう、フィルタ板10が揺動可能に装着された構成と
する。さらにまた、図２に例示したように、分岐板５の
反射光の入射面の入射面を変えることができるよう、フ
ィルタ板10が光軸を中心にして回動可能に装着された構
成とする。The filter plate 10 is swingably mounted so that the incident angle of the reflected light from the branch plate 5 can be varied. Further, as illustrated in FIG. 2, the filter plate 10 is mounted rotatably around the optical axis so that the incident surface of the incident surface of the reflected light of the branch plate 5 can be changed. .
【００１３】或いはまた、図３に例示したように、フィ
ルタ板10，フィルタ板10の透過光を受光素子７に集光す
るレンズ６及び受光素子７が円筒体20内に装着され、円
筒体20が光軸を中心にして回動可能である構成とする。Alternatively, as illustrated in FIG. 3, the filter plate 10, the lens 6 for collecting the transmitted light of the filter plate 10 and the light receiving device 7 are mounted in the cylindrical body 20, and the cylindrical body 20 Is rotatable about the optical axis.
【００１４】さらに、フィルタ板が、面方向に対して異
方性を有する吸収性フィルタである構成とする。Further, the filter plate is an absorptive filter having anisotropy in the plane direction.
【００１５】[0015]
【作用】本発明によれば、フィルタ板のＰ偏光透過率と
Ｓ偏光透過率の比が、分岐板のＳ偏光反射率とＰ偏光反
射率との比に等しいかほぼ等しい。したがって、分岐板
の反射光の偏光依存性がフィルタ板により補償され、受
光素子の受光する光はＰ偏光の光強度とＳ偏光の光強度
がほぼ等しくなる。According to the present invention, the ratio of the P polarized light transmittance and the S polarized light transmittance of the filter plate is equal to or substantially equal to the ratio of the S polarized light reflectance and the P polarized light reflectance of the branch plate. Therefore, the polarization dependency of the reflected light of the branch plate is compensated by the filter plate, and the light received by the light receiving element has substantially the same light intensity of P polarized light and S polarized light.
【００１６】即ち本発明の光モニター装置は、無偏光依
存性に富んでいる。また、フィルタ板のＰ偏光透過率と
Ｓ偏光透過率の比は、入射角或いは入射面を変えること
で加減できる。That is, the optical monitor device of the present invention is highly dependent on non-polarization. Further, the ratio of the P-polarized light transmittance and the S-polarized light transmittance of the filter plate can be adjusted by changing the incident angle or the incident surface.
【００１７】したがって、分岐板の反射率の製造上のば
らつき、及びフィルタ板の透過率の製造上のばらつき
が、請求項２〜請求項４の発明によって補正される。ま
た一方、異方性を有する吸収性フィルタをフィルタ板と
して採用すると、分岐板の反射光の光軸に対してフィル
タ板を殆ど傾斜させる必要がない。Therefore, the manufacturing variation of the reflectance of the branch plate and the manufacturing variation of the transmittance of the filter plate are corrected by the inventions of claims 2 to 4. On the other hand, if an absorptive filter having anisotropy is adopted as the filter plate, it is almost unnecessary to incline the filter plate with respect to the optical axis of the reflected light of the branch plate.
【００１８】したがって，光モニター装置の小形化・無
調整化が推進される。Therefore, miniaturization and no adjustment of the optical monitor device are promoted.
【００１９】[0019]
【実施例】以下図を参照しながら、本発明を具体的に説
明する。なお、全図を通じて同一符号は同一対象物を示
す。The present invention will be described in detail with reference to the drawings. The same reference numerals denote the same objects throughout the drawings.
【００２０】図１は本発明の実施例の構成図、図２は本
発明の他の実施例の構成図、図３は本発明のさらに他の
実施例の要所断面図である。図１乃至３において、10
は、入射角を所定に設定した時にＰ偏光透過率とＳ偏光
透過率の比が、分岐板５のＳ偏光反射率とＰ偏光反射率
との比に等しくなるように、例えばガラス板の表面に、
屈折率が異なる誘電体膜を交互に多層に形成したフィル
タ板である。FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is a block diagram of another embodiment of the present invention, and FIG. 3 is a cross-sectional view of a main part of still another embodiment of the present invention. 1 to 3, 10
Is such that the ratio of the P-polarized light transmittance and the S-polarized light transmittance when the incident angle is set to a predetermined value is equal to the ratio of the S-polarized light reflectance and the P-polarized light reflectance of the branch plate 5, for example, the surface of a glass plate. To
It is a filter plate in which dielectric films having different refractive indexes are alternately formed in multiple layers.
【００２１】一方、光強度をモニタすべき主光路は、入
力側光ファイバ１と出力側光ファイバ２とを対向配置
し、入力側光ファイバ１の出射端面側に出射光を平行光
にするレンズ３を配置し、一方出力側光ファイバ２の入
射端面側に、その平行光を出力側光ファイバ２の入射端
面に集光するレンズ４を設置して構成されている。On the other hand, the main optical path whose light intensity is to be monitored has a lens in which the input side optical fiber 1 and the output side optical fiber 2 are arranged to face each other, and the output light is collimated on the output end face side of the input side optical fiber 1. 3 is arranged, and a lens 4 for condensing the parallel light on the incident end surface of the output side optical fiber 2 is installed on the side of the incident end surface of the output side optical fiber 2.
【００２２】そして、レンズ３とレンズ４との間に、主
光路の光軸に45度傾斜するよう分岐板５を設置し、分岐
板５の反射光の光軸上にレンズ６を設置し、さらにレン
ズ６の後方に受光素子７を設置している。A branch plate 5 is installed between the lens 3 and the lens 4 so as to be inclined by 45 degrees with respect to the optical axis of the main optical path, and a lens 6 is installed on the optical axis of the reflected light of the branch plate 5, Further, a light receiving element 7 is installed behind the lens 6.
【００２３】本発明においては、この分岐板５の反射光
の光軸上で分岐板５とレンズ６との間に、前述のフィル
タ板10を光軸に対して所定の角度傾斜して設置してい
る。この所定の角度とは、フィルタ板10のＰ偏光透過率
とＳ偏光透過率の比が、分岐板５のＳ偏光反射率とＰ偏
光反射率との比に等しくなるように、設計時に設定した
入射角である。In the present invention, the above-mentioned filter plate 10 is installed between the branch plate 5 and the lens 6 on the optical axis of the reflected light of the branch plate 5 at a predetermined angle with respect to the optical axis. ing. This predetermined angle was set at the time of designing so that the ratio of the P-polarized light transmittance of the filter plate 10 and the S-polarized light transmittance of the filter plate 10 was equal to the ratio of the S-polarized light reflectance and the P-polarized light reflectance of the branch plate 5. Angle of incidence.
【００２４】このような光モニター装置は、入力側光フ
ァイバ１の出射光の大部分は分岐板５を透過して出力側
光ファイバ２に伝達される。一方、入力側光ファイバ１
の出射光の一部が分岐板５により反射され、その反射光
の大半がフィルタ板10を透過してレンズ６に達し、レン
ズ６により集光されて受光素子７の受光面に投射され、
光・電変換され受光素子７の電気的出力となるのである
が、図５に示すＳ偏光の反射率曲線ＳR 、Ｐ偏光の反射
率曲線ＰR でも明らかのように、分岐板５の反射光はＳ
偏光の光強度がＰ偏光の光強度よりも強い。In such an optical monitor device, most of the light emitted from the input side optical fiber 1 is transmitted through the branching plate 5 to the output side optical fiber 2. On the other hand, the input side optical fiber 1
A part of the emitted light of is reflected by the branch plate 5, most of the reflected light passes through the filter plate 10, reaches the lens 6, is condensed by the lens 6, and is projected on the light receiving surface of the light receiving element 7.
The light is photoelectrically converted into an electric output of the light receiving element 7. However, as is clear from the reflectance curve S R of S polarization and the reflectance curve P R of P polarization shown in FIG. Light is S
The light intensity of polarized light is stronger than the light intensity of P polarized light.
【００２５】この際フィルタ板10のＰ偏光透過率とＳ偏
光透過率の比が、分岐板５のＳ偏光反射率とＰ偏光反射
率との比に等しいので、分岐板５の反射光の偏光依存性
がフィルタ板10により補償される。At this time, since the ratio of the P polarized light transmittance and the S polarized light transmittance of the filter plate 10 is equal to the ratio of the S polarized light reflectance and the P polarized light reflectance of the branch plate 5, the polarization of the reflected light of the branch plate 5 The dependence is compensated by the filter plate 10.
【００２６】よって、受光素子７の受光する光はＰ偏光
の光強度とＳ偏光の光強度がほぼ等しくなり、偏光依存
性がほぼ解消される。一方、分岐板５のＳ偏光反射率と
Ｐ偏光反射率の比は、分岐板５の製造上のばらつき、及
び分岐板５の設置角度精度による主光線の入射角の変動
により、所定値との誤差は避けられない。Therefore, in the light received by the light receiving element 7, the P-polarized light intensity and the S-polarized light intensity are substantially equal to each other, and the polarization dependence is substantially eliminated. On the other hand, the ratio between the S-polarized reflectance and the P-polarized reflectance of the branch plate 5 is a predetermined value due to manufacturing variations of the branch plate 5 and fluctuations of the incident angle of the chief ray due to the installation angle accuracy of the branch plate 5. Errors are inevitable.
【００２７】また、フィルタ板10のＳ偏光透過率とＰ偏
光透過率の比は、フィルタ板10の製造上のばらつきによ
り、所定値との誤差は避けられない。このために、分岐
板５の反射光に対して入射角を変えることができるよう
に、フィルタ板10は図１の矢印Ａの方向に揺動可能とし
ている。In addition, the ratio of the S-polarized light transmittance and the P-polarized light transmittance of the filter plate 10 is inevitably in error with a predetermined value due to manufacturing variations of the filter plate 10. For this reason, the filter plate 10 can be swung in the direction of arrow A in FIG. 1 so that the incident angle with respect to the reflected light of the branch plate 5 can be changed.
【００２８】このことにより前述のフィルタ板10のＰ偏
光透過率とＳ偏光透過率の比が、分岐板５のＳ偏光反射
率とＰ偏光反射率との比に等しくなるように調整するこ
とかてきるので、分岐板５の反射光の偏光依存性がフィ
ルタ板10により補償される。With this arrangement, it is necessary to adjust the ratio of the P-polarized light transmittance and the S-polarized light transmittance of the filter plate 10 to be equal to the ratio of the S-polarized light reflectance and the P-polarized light reflectance of the branch plate 5. Therefore, the polarization dependency of the reflected light of the branch plate 5 is compensated by the filter plate 10.
【００２９】図２において、フィルタ板10を光軸に対し
て所定の角度傾斜させ、且つ分岐板５の反射光の入射面
の入射面を変えることができるよう、フィルタ板10が光
軸を中心にして矢印Ｂのように回動可能に装着されてい
る。In FIG. 2, the filter plate 10 is centered on the optical axis so that the filter plate 10 can be tilted at a predetermined angle with respect to the optical axis and the incident surface of the reflected light incident surface of the branch plate 5 can be changed. And is rotatably attached as shown by arrow B.
【００３０】入射面が変わるとことに伴いＰ偏光，Ｓ偏
光のベクトルの方位が変わる。したがって、Ｐ偏光透過
率及びＳ偏光透過率の比を変えることができる。図３に
示す光モニター装置は、フィルタ板10，フィルタ板10の
透過光を受光素子７に集光するレンズ６及び受光素子７
を円筒体20内に装着し、この円筒体20を光軸即ち円筒体
20の軸心を中心にして回動可能の構造にしたものであ
る。Along with the change of the incident surface, the directions of the P-polarized and S-polarized vectors change. Therefore, the ratio of the P polarized light transmittance and the S polarized light transmittance can be changed. The optical monitor device shown in FIG. 3 includes a filter plate 10, a lens 6 that collects light transmitted through the filter plate 10 on a light receiving element 7, and a light receiving element 7.
Mounted in the cylindrical body 20, and the cylindrical body 20 is
The structure is such that it can rotate about the axis of 20.
【００３１】なお、フィルタ板10は光軸に対して所定の
角度傾斜され固定されている。円筒体20を回動すること
で、分岐板５の反射光の入射面を調整することができ、
偏光依存性がほぼ解消される。The filter plate 10 is inclined and fixed at a predetermined angle with respect to the optical axis. By rotating the cylindrical body 20, the incident surface of the reflected light of the branch plate 5 can be adjusted,
The polarization dependence is almost eliminated.
【００３２】図３に図示した円筒体20を回動するように
光モニター装置は、組立作業が容易であるという利点が
ある。また、一方図面は省略したが、フィルタ板を、面
方向に対して異方性を有する吸収性フィルタとすること
で、偏光依存性が解消される。The optical monitor device, which rotates the cylindrical body 20 shown in FIG. 3, has an advantage that the assembling work is easy. On the other hand, although not shown in the drawings, the polarization dependence is eliminated by using the filter plate as an absorptive filter having anisotropy in the plane direction.
【００３３】面方向に対して異方性を有する吸収性フィ
ルタは、誘電体膜の蒸着形成時に蒸着物の投射方向に対
してフィルタ基板を傾ける。或いは多層誘電体膜の表面
に微細な異方性の傷を付けて、ストライプ状の膜とする
こと等で形成することができる。In the absorptive filter having anisotropy with respect to the plane direction, the filter substrate is tilted with respect to the projection direction of the deposit when the dielectric film is deposited. Alternatively, it can be formed by forming fine anisotropic scratches on the surface of the multilayer dielectric film to form a striped film.
【００３４】フィルタ板を異方性を有する吸収性フィル
タとすることで、フィルタ板を分岐板の反射光に対して
傾ける必要が必ずしも無くなる。よって、光モニター装
置の小形化・無調整化が推進される。By making the filter plate an absorptive filter having anisotropy, it is not always necessary to tilt the filter plate with respect to the reflected light of the branch plate. Therefore, miniaturization and no adjustment of the optical monitor device will be promoted.
【００３５】[0035]
【発明の効果】以上説明したように本発明は、フィルタ
板のＰ偏光透過率とＳ偏光透過率の比を分岐板のＳ偏光
反射率とＰ偏光反射率との比に等しく光モニター装置で
あって、分岐板の反射光の偏光依存性がフィルタ板によ
り補償され、受光素子の受光する光はＰ偏光の光強度と
Ｓ偏光の光強度がほぼ等しくなり、無偏光依存性に富ん
でいるという効果を有する。As described above, the present invention is an optical monitor device in which the ratio of the P-polarized light transmittance and the S-polarized light transmittance of the filter plate is made equal to the ratio of the S-polarized light reflectance and the P-polarized light reflectance of the branch plate. Therefore, the polarization dependence of the reflected light of the branch plate is compensated by the filter plate, and the light received by the light receiving element has substantially the same P-polarized light intensity and S-polarized light intensity, and is highly non-polarized. Has the effect.
【００３６】また、分岐板の反射光のフィルタ板への入
射角又は入射面を加減することで、分岐板の反射率の製
造上のばらつき、及びフィルタ板の透過率の製造上のば
らつきが補正でき、無偏光依存性がさらに向上するとい
う効果を有する。Further, by adjusting the incident angle or the incident surface of the reflected light of the branch plate to the filter plate, the manufacturing variation of the reflectance of the branch plate and the manufacturing variation of the transmittance of the filter plate are corrected. This has the effect of further improving the non-polarization dependence.
【００３７】また、異方性を有する吸収性フィルタをフ
ィルタ板として採用することで、光モニター装置の小形
化・無調整化が推進される。Further, by adopting an absorptive filter having anisotropy as the filter plate, miniaturization and no adjustment of the optical monitor device are promoted.
【図１】 本発明の実施例の構成図FIG. 1 is a configuration diagram of an embodiment of the present invention.
【図２】 本発明の他の実施例の構成図FIG. 2 is a configuration diagram of another embodiment of the present invention.
【図３】 本発明のさらに他の実施例の要所断面図FIG. 3 is a sectional view showing a main part of still another embodiment of the present invention.
【図４】 従来例の構成図FIG. 4 is a block diagram of a conventional example
【図５】 偏光の入射角と透過率・反射率との関係図FIG. 5: Relationship between incident angle of polarized light and transmittance / reflectance
１ 入力側光ファイバ ２ 出力側光ファイバ 3,4,6 レンズ ５ 分岐板 ７ 受光素子 10 フィルタ板 20 円筒体 ＳT Ｓ偏光の透過率 ＰT Ｐ偏光の透過率 ＳR Ｓ偏光の反射率 ＰR Ｐ偏光の反射率1 Input-side optical fiber 2 Output-side optical fiber 3,4,6 Lens 5 Branch plate 7 Light receiving element 10 Filter plate 20 Cylindrical body S T S polarized light transmittance P T P polarized light transmittance S R S polarized light reflectance P R P polarized light reflectance
Claims (5)
る分岐板を主光路の光軸上に配置し、該分岐板の反射光
を受光素子で受光する構成の装置において、 Ｐ偏光透過率とＳ偏光透過率の比が、該分岐板(5) のＳ
偏光反射率とＰ偏光反射率との比に等しいか又はほぼ等
しいフィルタ板(10)が、該分岐板(5) と該受光素子(7)
との間に挿入配置されてなることを特徴とする光モニタ
ー装置。1. An apparatus having a structure in which a branch plate for branching transmitted light and reflected light at a desired ratio is arranged on the optical axis of the main optical path, and the reflected light of the branch plate is received by a light receiving element. The ratio between the transmittance and the S-polarized transmittance is S of the branch plate (5).
A filter plate (10) equal to or almost equal to the ratio of the polarized light reflectance and the P-polarized light reflectance is formed by the branch plate (5) and the light receiving element (7).
An optical monitor device characterized by being inserted and disposed between and.
るよう、フィルタ板(10)が揺動可能に装着されてなるこ
とを特徴とする請求項１記載の光モニター装置。2. The optical monitor device according to claim 1, wherein a filter plate (10) is swingably mounted so that an incident angle of the reflected light from the branch plate (5) can be varied.
とができるよう、フィルタ板(10)が光軸を中心にして回
動可能に装着されてなることを特徴とする請求項１記載
の光モニター装置。3. The filter plate (10) is mounted rotatably about an optical axis so that the incident surface of the reflected light of the branch plate (5) can be changed. The optical monitor device according to 1.
過光を受光素子(7)に集光するレンズ(6) 及び該受光素
子(7) が円筒体(20)内に装着され、該円筒体20が光軸を
中心にして回動可能であることを特徴とする請求項１記
載の光モニター装置。4. A filter plate (10), a lens (6) for condensing transmitted light of the filter plate (10) on a light receiving element (7), and the light receiving element (7) mounted in a cylindrical body (20). The optical monitor device according to claim 1, wherein the cylindrical body 20 is rotatable about an optical axis.
対して異方性を有する吸収性フィルタであることを特徴
とする光モニター装置。5. The optical monitor device according to claim 1, wherein the filter plate is an absorptive filter having anisotropy in a plane direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5121045A JP2959327B2 (en) | 1993-05-24 | 1993-05-24 | Light monitoring equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5121045A JP2959327B2 (en) | 1993-05-24 | 1993-05-24 | Light monitoring equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06331940A true JPH06331940A (en) | 1994-12-02 |
| JP2959327B2 JP2959327B2 (en) | 1999-10-06 |
Family
ID=14801464
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5121045A Expired - Fee Related JP2959327B2 (en) | 1993-05-24 | 1993-05-24 | Light monitoring equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2959327B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09116507A (en) * | 1995-10-17 | 1997-05-02 | Fujitsu Ltd | Optical device for monitoring |
| JPH09166725A (en) * | 1995-12-15 | 1997-06-24 | Nec Corp | Connection structure for low polarization dependent optical fiber |
| US6048102A (en) * | 1995-11-20 | 2000-04-11 | Fujitsu Limited | Optical connector which provides a disconnection state between two optical fibers where light is totally reflected at an end face of one fiber |
| WO2001065221A1 (en) * | 2000-03-03 | 2001-09-07 | Exfo Electro-Optical Engineering Inc. | Polarization independent photodetector device and method of making same |
| US6621067B2 (en) | 2000-03-03 | 2003-09-16 | Exfo Electro-Optical Engineering Inc. | Polarization independent photodetector device and method of making same |
| EP1408355A1 (en) * | 2002-10-10 | 2004-04-14 | Lucent Technologies Inc. | Polarization compensated optical tap |
-
1993
- 1993-05-24 JP JP5121045A patent/JP2959327B2/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09116507A (en) * | 1995-10-17 | 1997-05-02 | Fujitsu Ltd | Optical device for monitoring |
| US6048102A (en) * | 1995-11-20 | 2000-04-11 | Fujitsu Limited | Optical connector which provides a disconnection state between two optical fibers where light is totally reflected at an end face of one fiber |
| JPH09166725A (en) * | 1995-12-15 | 1997-06-24 | Nec Corp | Connection structure for low polarization dependent optical fiber |
| WO2001065221A1 (en) * | 2000-03-03 | 2001-09-07 | Exfo Electro-Optical Engineering Inc. | Polarization independent photodetector device and method of making same |
| US6621067B2 (en) | 2000-03-03 | 2003-09-16 | Exfo Electro-Optical Engineering Inc. | Polarization independent photodetector device and method of making same |
| EP1408355A1 (en) * | 2002-10-10 | 2004-04-14 | Lucent Technologies Inc. | Polarization compensated optical tap |
| JP2004133418A (en) * | 2002-10-10 | 2004-04-30 | Lucent Technol Inc | System used in polarization non-dependency optical tap |
| US6807004B2 (en) | 2002-10-10 | 2004-10-19 | Lucent Technologies Inc. | Polarization independent optical taps |
| JP4542321B2 (en) * | 2002-10-10 | 2010-09-15 | アルカテル−ルーセント ユーエスエー インコーポレーテッド | Apparatus for use in polarization independent optical taps |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2959327B2 (en) | 1999-10-06 |
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