JPS6425784U - - Google Patents
Info
- Publication number
- JPS6425784U JPS6425784U JP11953487U JP11953487U JPS6425784U JP S6425784 U JPS6425784 U JP S6425784U JP 11953487 U JP11953487 U JP 11953487U JP 11953487 U JP11953487 U JP 11953487U JP S6425784 U JPS6425784 U JP S6425784U
- Authority
- JP
- Japan
- Prior art keywords
- vehicle
- light
- measured
- inter
- optical transponder
- 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
- 230000003287 optical effect Effects 0.000 claims description 10
- 238000005259 measurement Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 6
- 230000010287 polarization Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Landscapes
- Optical Radar Systems And Details Thereof (AREA)
Description
第１図は本考案による車間距離測定装置の一実
施例を示す構成図、第２図は本考案に係る光トラ
ンスポンダの構成を示す断面図、第３図は本考案
に係る光学系の構成を示す断面図、第４図はレー
ザビームの偏光状態を示す説明図、第５図は光ト
ランスポンダにおける偏光状態を示す説明図、第
６図は偏光ビームスプリツタにおける偏光状態を
示す説明図、第７図は従来の車間距離測定装置に
よる距離測定方法を説明する説明図である。
１０……測定車両、１２……被測定車両、２０
……光トランスポンダ、２２……光学系、２６…
…コーナキユーブプリズム、２８……1/4波長板
、３６……半導体レーザ、３８……偏光ビームス
プリツタ、４４……受光素子。
Fig. 1 is a block diagram showing an embodiment of the inter-vehicle distance measuring device according to the present invention, Fig. 2 is a sectional view showing the structure of the optical transponder according to the present invention, and Fig. 3 is a diagram showing the structure of the optical system according to the present invention. FIG. 4 is an explanatory diagram showing the polarization state of the laser beam, FIG. 5 is an explanatory diagram showing the polarization state in the optical transponder, FIG. 6 is an explanatory diagram showing the polarization state in the polarizing beam splitter, and FIG. The figure is an explanatory diagram illustrating a distance measuring method using a conventional inter-vehicle distance measuring device. 10... Measurement vehicle, 12... Vehicle to be measured, 20
...Optical transponder, 22...Optical system, 26...
... Corner cube prism, 28 ... 1/4 wavelength plate, 36 ... semiconductor laser, 38 ... polarizing beam splitter, 44 ... light receiving element.
Claims (1)
し、前記被測定車両からの反射光を前記測定車両
で受光して光の伝搬時間から車間距離を測定する
車間距離測定装置において、前記被測定車両に設
けられて前記測定車両からの光を偏光させて出力
する光トランスポンダと、前記測定車両に設けら
れて前記光トランスポンダによつて偏光された光
のみを受光する光学系とを備えた車間距離測定装
置。 (2) 前記光トランスポンダは、再帰反射する再
帰反射系と、該再帰反射系の入出光側に配置され
た1/4波長板とより成る実用新案登録請求の範囲
第(1)項に記載の車間距離測定装置。[Claims for Utility Model Registration] (1) Light is transmitted from a measurement vehicle toward a vehicle to be measured, and the reflected light from the vehicle to be measured is received by the vehicle to be measured, and the inter-vehicle distance is measured from the propagation time of the light. The inter-vehicle distance measuring device includes: an optical transponder installed in the vehicle to be measured that polarizes and outputs light from the measurement vehicle; and an optical transponder installed in the measurement vehicle that outputs only the polarized light by the optical transponder. An inter-vehicle distance measuring device equipped with an optical system for receiving light. (2) The optical transponder comprises a retroreflective system that performs retroreflection, and a quarter-wave plate disposed on the light input/output side of the retroreflection system. Inter-vehicle distance measuring device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987119534U JPH0530144Y2 (en) | 1987-08-04 | 1987-08-04 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987119534U JPH0530144Y2 (en) | 1987-08-04 | 1987-08-04 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6425784U true JPS6425784U (en) | 1989-02-13 |
| JPH0530144Y2 JPH0530144Y2 (en) | 1993-08-02 |
Family
ID=31364848
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987119534U Expired - Lifetime JPH0530144Y2 (en) | 1987-08-04 | 1987-08-04 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0530144Y2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014134405A (en) * | 2013-01-08 | 2014-07-24 | Mitsubishi Heavy Ind Ltd | Measuring system and measuring method |
| JPWO2019230890A1 (en) * | 2018-05-30 | 2021-04-22 | 富士フイルム株式会社 | Signal detection system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6168574A (en) * | 1984-09-13 | 1986-04-08 | Fujitsu Ten Ltd | Optical type sensor system |
-
1987
- 1987-08-04 JP JP1987119534U patent/JPH0530144Y2/ja not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6168574A (en) * | 1984-09-13 | 1986-04-08 | Fujitsu Ten Ltd | Optical type sensor system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014134405A (en) * | 2013-01-08 | 2014-07-24 | Mitsubishi Heavy Ind Ltd | Measuring system and measuring method |
| JPWO2019230890A1 (en) * | 2018-05-30 | 2021-04-22 | 富士フイルム株式会社 | Signal detection system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0530144Y2 (en) | 1993-08-02 |
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