JPH075427Y2 - Switching shutter device for lightwave rangefinder - Google Patents
Switching shutter device for lightwave rangefinderInfo
- Publication number
- JPH075427Y2 JPH075427Y2 JP7408089U JP7408089U JPH075427Y2 JP H075427 Y2 JPH075427 Y2 JP H075427Y2 JP 7408089 U JP7408089 U JP 7408089U JP 7408089 U JP7408089 U JP 7408089U JP H075427 Y2 JPH075427 Y2 JP H075427Y2
- Authority
- JP
- Japan
- Prior art keywords
- light
- measurement
- slit
- prism
- light source
- 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 - Fee Related
Links
Landscapes
- Optical Radar Systems And Details Thereof (AREA)
Description
【考案の詳細な説明】 （産業上の利用分野） 本考案は、光波距離計に使用される測定光と参照光の切
換用シャッタ装置に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a shutter device for switching between measurement light and reference light used in an optical distance meter.
（従来の技術） 光波距離計は、測定光路と光波距離計内の参照光路とを
通過した測定光と参照光とを受光素子で測定信号及び参
照信号に変換し、この測定信号及び参照信号を演算手段
に入力し、該演算手段によって両信号の位相差を計測
し、測距離を算出するものである。(Prior Art) A light distance meter converts a measurement light and a reference light that have passed through a measurement light path and a reference light path in the light distance meter into a measurement signal and a reference signal by a light receiving element, and converts the measurement signal and the reference signal. The distance is calculated by inputting it to the calculating means, measuring the phase difference between both signals by the calculating means.
従来、前記測定光と参照光とを切換えるためのシャッタ
装置として、外周部に測定光通過用スリットを、内周部
に参照光通過用スリットをそれぞれ設けたシャッタａを
第６図示のように光源ｂとプリズムｃとの間に配設した
ものが知られている。Conventionally, as a shutter device for switching between the measurement light and the reference light, a shutter a having a slit for passing the measurement light on the outer peripheral portion and a slit for the reference light passage on the inner peripheral portion is provided as a light source as shown in FIG. The one disposed between b and the prism c is known.
（考案が解決しようとする課題） 上述のものにおいて、光源ｂからの光は、シャッタａを
介してほぼ同一方向に出射され、光源ｂ−反射プリズム
ｃ−対物レンズｄ−反射鏡ｅ−対物レンズｄ−反射プリ
ズムｃ−受光素子ｆで構成される測定光光路ｇと、光源
ｂ−受光素子ｆで構成される参照光光路ｈを通過して受
光素子ｆで受光するようになっているため、光源ｂ及び
受光素子ｆに対するシャッタａの取り付け位置や角度並
びに前記反射プリズムｃの位置の調整が難しく、調整不
良となれば、測定誤差の光学的原因の一つである不要な
迷光が生じる。この迷光は非常に少ない量であっても受
光素子ｆで受光したときは測定誤差となる。(Problems to be Solved by the Invention) In the above-mentioned thing, the light from the light source b is emitted in almost the same direction through the shutter a, and the light source b-reflection prism c-objective lens d-reflection mirror e-objective lens. Since the measurement light optical path g configured by d-reflection prism c-light receiving element f and the reference light optical path h configured by the light source b-light receiving element f passes through and is received by the light receiving element f, It is difficult to adjust the mounting position and angle of the shutter a with respect to the light source b and the light receiving element f, and the position of the reflection prism c, and if the adjustment fails, unnecessary stray light, which is one of the optical causes of the measurement error, is generated. Even if the amount of this stray light is very small, it causes a measurement error when it is received by the light receiving element f.
本考案は、従来のこのような課題を解決することをその
目的とするものである。The present invention aims to solve the above-mentioned conventional problems.
（課題を解決するための手段） 本考案は、上記の目的を達成するために、光源からの光
を測定光または参照光として測定光光路または参照光光
路に切換え射出させる光波距離計用切換シャッタ装置に
おいて、モータの回転軸に、測定光通過用スリットを設
けたシャッタと、参照光通過用スリットを設けたシャッ
タを軸着し、光源からの光を互いに反対方向に２分割す
る分割プリズムを前記一対のシャッタの間に配設し、該
プリズムによる２分割光をそれぞれ前記一対のシャッタ
に向け、前記測定光と前記参照光を選択的に受光素子に
到達し得るように構成したことを特徴とする。(Means for Solving the Problem) In order to achieve the above-mentioned object, the present invention provides a switching shutter for an optical distance meter that switches and emits light from a light source as measurement light or reference light to a measurement light optical path or a reference light optical path. In the apparatus, a split prism that axially mounts a shutter provided with a slit for measuring light passage and a shutter provided with a slit for reference light passage on a rotation shaft of a motor, and divides light from a light source into two in opposite directions is provided. It is arranged between a pair of shutters, and it is configured such that the two split lights by the prism are directed to the pair of shutters, respectively, and the measurement light and the reference light can selectively reach a light receiving element. To do.
（作用） 測定光通過用スリットと参照光通過用スリットをそれぞ
れ別個のシャッタに設け、互いに反対方向の光を測定光
通過用スリットまたは参照光通過用スリットを通過させ
るようにしたから、光源及び受光素子に対するシャッタ
の取り付け位置及び角度並びに反射プリズムの位置の調
整を容易に行うことができる。(Operation) Since the slits for measuring light passage and the slits for passing reference light are provided in separate shutters so that light beams in opposite directions pass through the slits for passing measuring light or the slits for passing reference light, the light source and the light receiving It is possible to easily adjust the attachment position and angle of the shutter with respect to the element and the position of the reflection prism.
（実施例） 以下本考案の実施例を図面に付き説明する。Embodiment An embodiment of the present invention will be described below with reference to the drawings.
第１図において、１はモータで、その両側には、回転軸
２が突出し、その両突出部には、シャッタ３及び４が軸
着されている。この２つのシャッタ３と４の間には、例
えば直角プリズムを２枚重ねた分割プリズム５が配設さ
れており、この分割プリズム５と対向し、前記回転軸２
と直角方向に光を出射する光源６が配設されており、光
源６からの光は分割プリズム５で左右90度方向に分割さ
れるようになっている。In FIG. 1, reference numeral 1 is a motor, on both sides of which a rotary shaft 2 projects, and on both projections, shutters 3 and 4 are mounted. Between the two shutters 3 and 4, for example, a split prism 5 in which two right-angle prisms are stacked is arranged. The split prism 5 faces the split prism 5 and the rotary shaft 2
A light source 6 that emits light in a direction perpendicular to is disposed, and the light from the light source 6 is split by a split prism 5 in the left and right 90 ° directions.
前記２つのシャッタ３及び４には、第２図及び第３図に
示すように、それぞれ測定光通過用スリット７及び参照
光通過用スリット８が形成されている。このスリット７
及び８は、例えばほぼ半円形状であり、この形状によれ
ば、開口面積が小さくかつ、効率よく光を導くことがで
きる。そしてこのスリット７及び８は、シャッタ３及び
４の回転方向に対して互いにずらされて形成されてお
り、第２図示の位置では、光源（図示しない）からの光
９は測定光通過用スリット７を通過し、参照光通過用ス
リット８を通過せず、第３図示の位置では、光源からの
光は参照光通過用スリット８を通過し、測定光通過用ス
リット７を通過しないようになっている。As shown in FIGS. 2 and 3, the two shutters 3 and 4 are provided with a measuring light passing slit 7 and a reference light passing slit 8, respectively. This slit 7
Reference numerals 8 and 8 are, for example, substantially semicircular shapes. According to this shape, the opening area is small and light can be guided efficiently. The slits 7 and 8 are formed so as to be offset from each other with respect to the rotation directions of the shutters 3 and 4, and at the position shown in the second figure, the light 9 from the light source (not shown) passes through the measuring light passage slit 7. In the position shown in FIG. 3, the light from the light source passes through the reference light passing slit 8 and does not pass through the measuring light passing slit 7. There is.
かくて、光源からの光を測定光光路を経て受光素子に入
射させるときは第２図示の位置に、光源からの光を参照
光光路を経て受光素子に入射させるときは第３図示の位
置になるようにモータ１を正逆転し停止させる。Thus, when the light from the light source is incident on the light receiving element via the measurement light optical path, it is at the position shown in FIG. 2, and when the light from the light source is incident on the light receiving element via the reference light optical path, it is at the position shown in third. Then, the motor 1 is rotated in the normal and reverse directions to stop.
第４図は、光源からの光が測定光通過用スリット７を通
過したときのシャッタ装置の要部の側面図を示してお
り、この位置では、回転軸２に固着されたレバー10がモ
ータ本体11に固定したストッパ121に係止している。参
照光通過用スリット８から、光源からの光を通過させる
ときは、モータ１をレバー10がストッパ122に係止する
まで矢示の方向に回転させる。FIG. 4 is a side view of the main part of the shutter device when the light from the light source passes through the measurement light passing slit 7. At this position, the lever 10 fixed to the rotating shaft 2 is attached to the motor body. It is locked to the stopper 12 1 fixed to 11. From the reference light passes through a slit 8, when passing the light from the light source, the motor 1 is lever 10 rotates in the direction of the arrow until it engages the stopper 12 2.
第５図は、本考案の切換シャッタ装置を配設した光波距
離計の構成を示す概略図である。FIG. 5 is a schematic view showing the configuration of a lightwave distance meter provided with the switching shutter device of the present invention.
シャッタ３が第２図示の位置にある場合には、光源６か
らの光は分割プリズム５、測定光通過用スリット７を経
てダイクロイックプリズム13に入射し、それから対物レ
ンズ14を経て反射プリズム（図示せず）で反射され、再
び対物レンズ14に入射し、ダイクロイックプリズム13を
経て受光素子15に入射する。シャッタ４が第３図示の位
置にある場合には、光源６からの光はレンズ22、分割プ
リズム５、参照光通過用スリット８、集光レンズ16およ
び光ファイバ17を経て受光素子15に入射する。When the shutter 3 is at the position shown in FIG. 2, the light from the light source 6 enters the dichroic prism 13 through the split prism 5 and the slit 7 for passing the measurement light, and then passes through the objective lens 14 and the reflecting prism (not shown). (3) and then enters the objective lens 14 again, and then enters the light receiving element 15 through the dichroic prism 13. When the shutter 4 is at the position shown in FIG. 3, the light from the light source 6 enters the light receiving element 15 through the lens 22, the split prism 5, the reference light passing slit 8, the condenser lens 16 and the optical fiber 17. .
同図において、対物レンズ14、ダイクロイックプリズム
13、合焦レンズ18、ダハプリズム19、焦点鏡20及び接眼
レンズ21の光学系は視準光学系である。In the figure, the objective lens 14 and the dichroic prism
The optical system of 13, the focusing lens 18, the roof prism 19, the focusing mirror 20, and the eyepiece lens 21 is a collimating optical system.
（考案の効果） 本考案は、上述の構成を有するから、測定誤差の光学的
原因の１つである不必要な迷光を容易に防止することが
できる効果を有する。(Effect of the Invention) Since the present invention has the above-mentioned configuration, it has an effect of easily preventing unnecessary stray light, which is one of the optical causes of measurement errors.
第１図は本考案の１実施例の正面図、第２図及び第３図
はそれぞれ異なる作動状態の説明図、第４図は前記実施
例の要部の側面図、第５図は本考案切換シャッタ装置を
配設した光波距離計の構成を示す慨略図、第６図は従来
例の線図である。 １…モータ、２…回転軸 ３、４…シャッタ、５…分割プリズム ６…光源 ７…測定光通過用スリット ８…参照光通過用スリット ９…光FIG. 1 is a front view of an embodiment of the present invention, FIGS. 2 and 3 are explanatory views of different operating states, FIG. 4 is a side view of the essential part of the embodiment, and FIG. 5 is the present invention. FIG. 6 is a schematic diagram showing a configuration of an optical distance meter provided with a switching shutter device, and FIG. 6 is a diagram of a conventional example. DESCRIPTION OF SYMBOLS 1 ... Motor, 2 ... Rotation axis 3, 4 ... Shutter, 5 ... Dividing prism 6 ... Light source 7 ... Measuring light passage slit 8 ... Reference light passage slit 9 ... Light
Claims (1)
測定光光路または参照光光路に切換え射出させる光波距
離計用切換シャッタ装置において、モータの回転軸に、
測定光通過用スリットを設けたシャッタと、参照光通過
用スリットを設けたシャッタを軸着し、光源からの光を
互いに反対方向に２分割する分割プリズムを前記一対の
シャッタの間に配設し、該プリズムによる２分割光をそ
れぞれ前記一対のシャッタに向け、前記測定光と前記参
照光を選択的に受光素子に到達し得るように構成したこ
とを特徴とする光波距離計用切換シャッタ装置。1. A switching shutter device for an optical distance meter, which switches and emits light from a light source as measurement light or reference light to a measurement light optical path or a reference light optical path, wherein
A shutter provided with a slit for passing the measurement light and a shutter provided with a slit for passing the reference light are axially attached, and a split prism for splitting light from the light source into two in opposite directions is provided between the pair of shutters. A switching shutter device for an optical distance meter, characterized in that the split light beams of the prism are directed to the pair of shutters, respectively, and the measurement light and the reference light can selectively reach a light receiving element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7408089U JPH075427Y2 (en) | 1989-06-24 | 1989-06-24 | Switching shutter device for lightwave rangefinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7408089U JPH075427Y2 (en) | 1989-06-24 | 1989-06-24 | Switching shutter device for lightwave rangefinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0314475U JPH0314475U (en) | 1991-02-14 |
| JPH075427Y2 true JPH075427Y2 (en) | 1995-02-08 |
Family
ID=31613461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7408089U Expired - Fee Related JPH075427Y2 (en) | 1989-06-24 | 1989-06-24 | Switching shutter device for lightwave rangefinder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH075427Y2 (en) |
-
1989
- 1989-06-24 JP JP7408089U patent/JPH075427Y2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0314475U (en) | 1991-02-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |