JPS6425785U - - Google Patents
Info
- Publication number
- JPS6425785U JPS6425785U JP11953587U JP11953587U JPS6425785U JP S6425785 U JPS6425785 U JP S6425785U JP 11953587 U JP11953587 U JP 11953587U JP 11953587 U JP11953587 U JP 11953587U JP S6425785 U JPS6425785 U JP S6425785U
- Authority
- JP
- Japan
- Prior art keywords
- vehicle
- light
- measured
- inter
- optical
- 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
- 230000003287 optical effect Effects 0.000 claims description 13
- 238000005259 measurement Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 8
- 230000010287 polarization Effects 0.000 description 3
- 230000003321 amplification Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003199 nucleic acid amplification 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
に係る光学系および光量制御系の構成を示す構成
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図は本考案の
他の実施例の光学系および光量制御系を示す構成
図、第８図は第７図の実施例のレーザ入力電流と
光出力の関係を示す特性図、第９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、４６……電気光学
結晶、５０……偏光板、５２……光シヤツタ制御
回路、５４……受光増幅回路、６２……自動光出
力制御回路、６４……レーザ駆動回路。
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 an optical transponder according to the present invention, and Fig. 3 is an optical system and light amount control according to the present invention. A block diagram showing the system configuration, 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, and Fig. 6 is an explanatory diagram showing the polarization state in the polarizing beam splitter. 7 is a configuration diagram showing the optical system and light amount control system of another embodiment of the present invention, FIG. 8 is a characteristic diagram showing the relationship between laser input current and optical output of the embodiment of FIG. 7, and FIG. FIG. 9 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, 46 ... electro-optic crystal, 50 ... polarizing plate, 52 ... . . . Optical shutter control circuit, 54 . . . Light reception amplification circuit, 62 . . . Automatic optical output control circuit, 64 . . . Laser drive circuit.
Claims (1)
前記被測定車両からの反射光を前記測定車両側で
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、該光学系に受光される受
光量を抑制する制御手段とを備えた車間距離測定
装置。 Sends light from the measurement vehicle to the vehicle to be measured,
In the inter-vehicle distance measuring device that receives reflected light from the measured vehicle on the measuring vehicle side and measures the inter-vehicle distance from the propagation time of the light, the device is provided on the measured vehicle and polarizes the light from the measured vehicle. an optical transponder that outputs light, an optical system that is provided on the measurement vehicle and receives only the light polarized by the optical transponder, and a control means that suppresses the amount of light received by the optical system. Inter-vehicle distance measuring device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11953587U JPS6425785U (en) | 1987-08-04 | 1987-08-04 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11953587U JPS6425785U (en) | 1987-08-04 | 1987-08-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6425785U true JPS6425785U (en) | 1989-02-13 |
Family
ID=31364850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11953587U Pending JPS6425785U (en) | 1987-08-04 | 1987-08-04 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6425785U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5024091A (en) * | 1972-06-30 | 1975-03-14 |
-
1987
- 1987-08-04 JP JP11953587U patent/JPS6425785U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5024091A (en) * | 1972-06-30 | 1975-03-14 |
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