JPS6118491Y2 - - Google Patents
Info
- Publication number
- JPS6118491Y2 JPS6118491Y2 JP2126781U JP2126781U JPS6118491Y2 JP S6118491 Y2 JPS6118491 Y2 JP S6118491Y2 JP 2126781 U JP2126781 U JP 2126781U JP 2126781 U JP2126781 U JP 2126781U JP S6118491 Y2 JPS6118491 Y2 JP S6118491Y2
- Authority
- JP
- Japan
- Prior art keywords
- light beam
- prism
- angle
- prisms
- cylindrical body
- 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
- 230000004907 flux Effects 0.000 claims description 13
- 230000001154 acute effect Effects 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims 1
- 238000006073 displacement reaction Methods 0.000 description 9
Description
【考案の詳細な説明】
本考案は光束方向調整器に関し、とくに光束方
向の微動調整が容易にできる光束方向調整器に関
する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a light beam direction adjuster, and more particularly to a light beam direction adjuster that allows fine adjustment of the light beam direction with ease.
従来、光束の方向を調整する手段は一般に鏡に
より光束を反射して、鏡の向きを調整することに
より光束方向を調整していた。このため光束の方
向が鏡の変位角の２倍変わつてしまう。 Conventionally, the means for adjusting the direction of the light beam has generally reflected the light beam with a mirror and adjusted the direction of the light beam by adjusting the direction of the mirror. As a result, the direction of the light flux changes by twice the displacement angle of the mirror.
このように鏡で光束を折り返す場合には光束の
向きに大きな角度変位をともなうので、光束方向
の微動調整が困難である欠点があつた。また鏡で
折り返すために光束の向きを調整角以上に変えて
しまう欠点もあつた。 When the light beam is folded back by a mirror in this way, there is a large angular displacement in the direction of the light beam, which has the drawback that fine adjustment of the direction of the light beam is difficult. Another drawback was that the direction of the light beam was changed by more than the adjustment angle because it was reflected by a mirror.
本考案の目的はかかる従来欠点を除去した調整
角に対し光束の変位する角度が縮小される光束方
向調整器を提供することにある。 An object of the present invention is to provide a light flux direction adjuster which eliminates such conventional drawbacks and reduces the angle at which the light flux is displaced relative to the adjustment angle.
すなわち本考案によれば光束の入射面と出射面
を有し、その２面が鋭角をなす形状の第１および
第２のプリズムと第１の円筒体と、第１の円筒体
の外周面と嵌合摺動する第２の円筒体と、第１の
プリズムの光束の出射面と第２のプリズムの光束
の入射面とを平行に、かつ両円筒体の共通中心軸
に垂直に近接配置させ第１および第２のプリズム
を固定したことを特徴とする光束方向調整器が得
られる。 That is, according to the present invention, first and second prisms each having a light beam entrance surface and an exit surface, the two surfaces of which form an acute angle, a first cylindrical body, and an outer circumferential surface of the first cylindrical body. A second cylindrical body that fits and slides, and a light beam exit surface of the first prism and a light beam incidence surface of the second prism are arranged close to each other in parallel and perpendicularly to a common central axis of both cylinders. A light beam direction adjuster is obtained which is characterized in that the first and second prisms are fixed.
以下、本考案を第１図を参照して説明する。 Hereinafter, the present invention will be explained with reference to FIG.
第１図は本考案の実施例の展開図である。光束
の入射面と出射面のなす角が鋭角αラジアンを成
す直角三角柱形状のプリズム１および２を用いる
プリズム１を支持板３で外側の筒（以後外筒）４
に固定し、プリズム２を支持板５で内側の筒（以
後内筒と称す）６に固定する。このときプリズム
１光束の出射面７とプリズム２の光束の入射面８
とが平行に近接し、かつ、筒の共通中心軸９に垂
直になるよう配置する。しかも外筒４の内側に内
筒６をはめあわせて、外筒４に対して内筒６が両
筒の共通中心軸９を中心として左右回転できるよ
うに設置する。内筒６を外筒４に対して、両筒の
共通中心軸９を中心として回転させて、プリズム
２の光束の出射面１０がプリズム１の光束の入射
面１１と平行になる配置にする。このとき、光束
１２をプリズムの光束の入射面１１に垂直に入射
させると、プリズム１および２を通過して出射す
る光束１３は光束９と同一の進行方向に進む。外
筒４を支持台１４で固定し、内筒６を筒の共通中
心軸９を中心として微小角Δθラジアル回転させ
ると、光束１３は、プリズム１の光束の入射面１
１と光束の出射面との交線に平行で光束１２を含
む平面（変位面）上で微小角Δε分だけ傾く。そ
の微小角Δεは近似的に次式で示される。 FIG. 1 is a developed view of an embodiment of the present invention. Prisms 1 and 2 are in the form of right triangular prisms in which the angle between the incident surface and the exit surface of the light beam forms an acute angle α radian.The prism 1 is mounted on an outer cylinder (hereinafter referred to as an outer cylinder) 4 using a support plate 3.
The prism 2 is fixed to an inner cylinder (hereinafter referred to as an inner cylinder) 6 with a support plate 5. At this time, the exit surface 7 of the light beam of prism 1 and the entrance surface 8 of the light beam of prism 2
are arranged in parallel and close to each other and perpendicular to the common central axis 9 of the cylinder. Moreover, the inner cylinder 6 is fitted inside the outer cylinder 4 and installed so that the inner cylinder 6 can rotate left and right with respect to the outer cylinder 4 about a common central axis 9 of both cylinders. The inner cylinder 6 is rotated with respect to the outer cylinder 4 about a common central axis 9 of both cylinders, so that the light beam exit surface 10 of the prism 2 is arranged to be parallel to the light beam entrance surface 11 of the prism 1. At this time, when the light beam 12 is made perpendicularly incident on the light beam entrance surface 11 of the prism, the light beam 13 that passes through the prisms 1 and 2 and exits proceeds in the same traveling direction as the light beam 9. When the outer tube 4 is fixed on the support base 14 and the inner tube 6 is rotated radially by a small angle Δθ about the common central axis 9 of the tubes, the light beam 13 is directed to the incident surface 1 of the light beam of the prism 1.
It is tilted by a minute angle Δε on a plane (displacement plane) that is parallel to the line of intersection between the light beam 12 and the emission surface of the light beam 12 and includes the light beam 12. The minute angle Δε is approximately expressed by the following equation.
Δε＝（ｎ−１）sinα・Δθ …(1)
また、変位面に垂直な向きへの光束１３の傾き角
Δδの程度は次式であらわされる。 Δε=(n−1)sinα·Δθ (1) Further, the degree of the inclination angle Δδ of the light beam 13 in the direction perpendicular to the displacement surface is expressed by the following equation.
Δδ〜（ｎ−１）｛O1（sinα・Δγ・Δθ）＋
O2（（sinα・Δθ）２）｝ …(2)
ここで関数O1（Ｘ），O2（Ｘ）は誤差関数であ
り、Ｘの数倍から数分の１の間の範囲の値であ
る。ｎはプリズムの屈折率であり、Δγは光束１
２のプリズム１の光束の入射面１１に垂直な向き
からのずれ角である。 Δδ〜(n-1) {O 1 (sinα・Δγ・Δθ)+
O 2 ((sinα・Δθ) 2 )} …(2) Here, the functions O 1 (X) and O 2 (X) are error functions, and the values range from several times X to a fraction of X. It is. n is the refractive index of the prism, and Δγ is the luminous flux 1
This is the deviation angle of the light beam of the second prism 1 from the direction perpendicular to the incident surface 11.
実施例として、α＝30゜，ｎ＝1.5とすると、
光束の微小変位角Δεは(1)式よにより、
Δε＝0.25Δθ ……(3)
となる。これは内筒６（すなわちプリズム２）の
回転角Δθに対し光束の微小変位角Δεは1/4に
縮小されている。また、内筒６の回転角Δθを
0.02ラジアン（1.1度）とすると、Δε＝0.005ラ
ジアン（0.3度）となる。そして、光束１２のプ
リズム１の光束の入射面１１に垂直な向きからの
ずれ角Δγも0.02ラジアン（1.1度）とする。こ
のとき、変位面に垂直な向きへの光束１３の傾き
角Δδは(2)式から、0.0002ラジアンのオーダーと
なりΔε（0.005ラジアン）の約25分の１となり
十分小さい。 As an example, if α=30° and n=1.5,
According to equation (1), the minute displacement angle Δε of the luminous flux is Δε=0.25Δθ ……(3). This means that the minute displacement angle Δε of the light beam is reduced to 1/4 of the rotation angle Δθ of the inner cylinder 6 (that is, the prism 2). Also, the rotation angle Δθ of the inner cylinder 6 is
If it is 0.02 radian (1.1 degree), Δε=0.005 radian (0.3 degree). The deviation angle Δγ of the light beam 12 from the direction perpendicular to the light incidence surface 11 of the prism 1 is also 0.02 radian (1.1 degree). At this time, from equation (2), the inclination angle Δδ of the light beam 13 in the direction perpendicular to the displacement plane is on the order of 0.0002 radian, which is approximately 1/25 of Δε (0.005 radian), which is sufficiently small.
以上、本考案は調整角に対して光束の変位する
角を縮小することができるため光束の変位角の微
調整が容易である利点を有し、光束１２に対して
てわずかに角変位した光束１３を得ることができ
る利点を有する。 As described above, the present invention has the advantage that fine adjustment of the displacement angle of the luminous flux is easy because the angle of displacement of the luminous flux with respect to the adjustment angle can be reduced. It has the advantage of being able to obtain 13.
第１図は本考案の実施例の展開図である。
１，２……プリズム、３，５……支持板、４…
…外筒、６……内筒、７……プリズム１の光束の
出射面、８……プリズム２の光束の入射面、９…
…（両筒の）共通中心軸、１０……プリズム２の
光束の出射面、１１……プリズム１の光束の入射
面、１２，１３……光束、１４……支持台。
FIG. 1 is a developed view of an embodiment of the present invention. 1, 2...prism, 3, 5...support plate, 4...
... Outer tube, 6... Inner tube, 7... Output surface of the light beam of prism 1, 8... Input surface of the light beam of prism 2, 9...
...Common central axis (of both cylinders), 10... Output surface of the light flux of the prism 2, 11... Input surface of the light flux of the prism 1, 12, 13... Light flux, 14... Support stand.
Claims (1)
をなす形状の第１および第２のプリズムと、第１
の円筒体と、前記第１の円筒体の外周面と嵌合摺
動する第２の円筒体と、前記第１のプリズムの光
束の出射面と第２のプリズムの光束の入射面とを
平行に、かつ前記両円筒体の共通中心軸に垂直に
近接配置させ前記第１および第２の円筒体に前記
第１および第２のプリズムを具備したことを特徴
とする光束方向調整器。 first and second prisms each having an incident surface and an exit surface for a light flux, the two surfaces of which form an acute angle;
a cylindrical body, a second cylindrical body that fits and slides on the outer peripheral surface of the first cylindrical body, and a luminous flux exit surface of the first prism and a luminous flux incident surface of the second prism that are parallel to each other. and the first and second prisms are arranged close to each other perpendicularly to a common central axis of both the cylindrical bodies, and the first and second prisms are provided on the first and second cylindrical bodies.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2126781U JPS6118491Y2 (en) | 1981-02-17 | 1981-02-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2126781U JPS6118491Y2 (en) | 1981-02-17 | 1981-02-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57136921U JPS57136921U (en) | 1982-08-26 |
| JPS6118491Y2 true JPS6118491Y2 (en) | 1986-06-05 |
Family
ID=29819148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2126781U Expired JPS6118491Y2 (en) | 1981-02-17 | 1981-02-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6118491Y2 (en) |
-
1981
- 1981-02-17 JP JP2126781U patent/JPS6118491Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57136921U (en) | 1982-08-26 |
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