JPS5612504A - Light path selection device for range finder utilizing light wave - Google Patents
Light path selection device for range finder utilizing light waveInfo
- Publication number
- JPS5612504A JPS5612504A JP8746379A JP8746379A JPS5612504A JP S5612504 A JPS5612504 A JP S5612504A JP 8746379 A JP8746379 A JP 8746379A JP 8746379 A JP8746379 A JP 8746379A JP S5612504 A JPS5612504 A JP S5612504A
- Authority
- JP
- Japan
- Prior art keywords
- shutter
- electro
- control device
- vibration
- photoelectric converter
- 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
- Measurement Of Optical Distance (AREA)
- Optical Radar Systems And Details Thereof (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
PURPOSE: To prevent the generation of vibration and improve the life time and reliability of a shutter by using an electro-optical light control device such as a liquid crystal or an electrochromatic element as the shutter.
CONSTITUTION: When a drive device 17 produces such voltage as to make transmissivity of an electro-optical light control device 13 to be 0 and transmissivity of an electro-optical light control device 8 to be 1, a light flux passing through an outer path is incident upon a photoelectric converter 9. Output signal from the photoelectric converter 9 is applied to a phase memory 23 and stored therein via an amplifier 14, a comparator 19 and a phase meter 15. Next, when the output from the drive 17 is reversed, a light flux passing through an inner light path irradiates into the photoelectric converter 9. Thereupon, a signal change over switch 18 is shifted and a light path length is displayed on an indicator 25 through an arithmetic circuit 24. Thus, because no vibration attendant upon driving of the shutter is generated, it becomes possible to perevent any trouble caused by such vibration.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8746379A JPS5612504A (en) | 1979-07-12 | 1979-07-12 | Light path selection device for range finder utilizing light wave |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8746379A JPS5612504A (en) | 1979-07-12 | 1979-07-12 | Light path selection device for range finder utilizing light wave |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5612504A true JPS5612504A (en) | 1981-02-06 |
| JPS6211312B2 JPS6211312B2 (en) | 1987-03-11 |
Family
ID=13915570
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8746379A Granted JPS5612504A (en) | 1979-07-12 | 1979-07-12 | Light path selection device for range finder utilizing light wave |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5612504A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS495253A (en) * | 1972-04-28 | 1974-01-17 | ||
| JPS518399A (en) * | 1974-07-10 | 1976-01-23 | Hitachi Ltd | |
| JPS52111741A (en) * | 1976-03-15 | 1977-09-19 | Shimadzu Corp | Optical interrupting device |
-
1979
- 1979-07-12 JP JP8746379A patent/JPS5612504A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS495253A (en) * | 1972-04-28 | 1974-01-17 | ||
| JPS518399A (en) * | 1974-07-10 | 1976-01-23 | Hitachi Ltd | |
| JPS52111741A (en) * | 1976-03-15 | 1977-09-19 | Shimadzu Corp | Optical interrupting device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6211312B2 (en) | 1987-03-11 |
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