JPS5571918A - Rod lens type photo wave meter - Google Patents
Rod lens type photo wave meterInfo
- Publication number
- JPS5571918A JPS5571918A JP14555378A JP14555378A JPS5571918A JP S5571918 A JPS5571918 A JP S5571918A JP 14555378 A JP14555378 A JP 14555378A JP 14555378 A JP14555378 A JP 14555378A JP S5571918 A JPS5571918 A JP S5571918A
- Authority
- JP
- Japan
- Prior art keywords
- grid
- rays
- face
- rod lens
- diffracted
- 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
Abstract
PURPOSE: To obtain a small wave meter with a sufficient resolving power and without an effect of mode difference by setting a rod lens, the end face of which is provided with a grid, and an image element that receives diffracted rays produced by the said grid.
CONSTITUTION: The grid 3 is formed on the end face 2 of the rod lens 1. An optical fiber 5 is connected to the opposite face 4, incident rays are refracted in the lens and become parallel rays inside of the end face 2. The length of rod lens is made slightly longer than 0.25 pitches so that rays are converged at the end face 2. The rays are diffracted by the grid 3 and are received by the image element 7 at the focusing position. When the optical fiber is located at a distance from the center of the end face 4, the rays can be obliquely applied to the grid 3 and can be diffracted in the direction perpendicular to the grid, the relation between the wave length and the displacement on the image element becomes linear. The interference length between the rays and the grid is several millimeters, a sufficient resolving power can be obtained.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14555378A JPS5571918A (en) | 1978-11-25 | 1978-11-25 | Rod lens type photo wave meter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14555378A JPS5571918A (en) | 1978-11-25 | 1978-11-25 | Rod lens type photo wave meter |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5571918A true JPS5571918A (en) | 1980-05-30 |
Family
ID=15387825
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14555378A Pending JPS5571918A (en) | 1978-11-25 | 1978-11-25 | Rod lens type photo wave meter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5571918A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5058981A (en) * | 1988-12-05 | 1991-10-22 | Sumitomo Electric Industries, Ltd. | Light source device |
-
1978
- 1978-11-25 JP JP14555378A patent/JPS5571918A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5058981A (en) * | 1988-12-05 | 1991-10-22 | Sumitomo Electric Industries, Ltd. | Light source device |
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