JPS5510540A - Testing method for optical fiber-use preform - Google Patents
Testing method for optical fiber-use preformInfo
- Publication number
- JPS5510540A JPS5510540A JP8351278A JP8351278A JPS5510540A JP S5510540 A JPS5510540 A JP S5510540A JP 8351278 A JP8351278 A JP 8351278A JP 8351278 A JP8351278 A JP 8351278A JP S5510540 A JPS5510540 A JP S5510540A
- Authority
- JP
- Japan
- Prior art keywords
- preform
- moire
- curve
- stripes
- moire stripes
- 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
Landscapes
- Testing Of Optical Devices Or Fibers (AREA)
Abstract
PURPOSE: To realize a nondestructive and simplified test for the preform structure by making use of the fact that the moire stripes are capable of a macroscopic magnification of the minute structure in order to analize the moire stripes of the preform and thus to measure the core diameter and the distribution form of the refractive index.
CONSTITUTION: Preform 6 to be tested is held into the matching oil in transparent container 7, and the light beam sent from Na lamp 9 is made to pass through moire grid 1 through lens 10. The light beam then crosses preform 6 from the side surface as shown by segment 11 and then projected on screen 13 via lens 12 after passing through moire grid 2. Container 7 is put on shift stage 14 of Y-Z direction and then shifted along the moire stripes while watching the screen, and shift amount ΔZ is read out through recorder 15. In this case, curve 16 shows the form of the measured moire stripes. The core diameter con be obtained directly from the distance between two peaks of the curve, and furthermore the distribution form and the difference of the refractive index can be calculated by analyzing the form of the curve.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8351278A JPS5510540A (en) | 1978-07-11 | 1978-07-11 | Testing method for optical fiber-use preform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8351278A JPS5510540A (en) | 1978-07-11 | 1978-07-11 | Testing method for optical fiber-use preform |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5510540A true JPS5510540A (en) | 1980-01-25 |
Family
ID=13804529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8351278A Pending JPS5510540A (en) | 1978-07-11 | 1978-07-11 | Testing method for optical fiber-use preform |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5510540A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100416992B1 (en) * | 2001-05-03 | 2004-02-05 | 삼성전자주식회사 | An apparatus for measuring pitch of fiber array comprised in an optical device |
| WO2006090524A1 (en) | 2005-02-22 | 2006-08-31 | Shin-Etsu Chemical Co., Ltd. | Method for measuring non-circularity at core portion of optical fiber parent material |
-
1978
- 1978-07-11 JP JP8351278A patent/JPS5510540A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100416992B1 (en) * | 2001-05-03 | 2004-02-05 | 삼성전자주식회사 | An apparatus for measuring pitch of fiber array comprised in an optical device |
| WO2006090524A1 (en) | 2005-02-22 | 2006-08-31 | Shin-Etsu Chemical Co., Ltd. | Method for measuring non-circularity at core portion of optical fiber parent material |
| EP1860397A1 (en) * | 2005-02-22 | 2007-11-28 | Shin-Etsu Chemical Company, Ltd. | Method for measuring non-circularity at core portion of optical fiber parent material |
| EP1860397A4 (en) * | 2005-02-22 | 2008-05-07 | Shinetsu Chemical Co | Method for measuring non-circularity at core portion of optical fiber parent material |
| US7595866B2 (en) | 2005-02-22 | 2009-09-29 | Shin Etsu Chemical Co., Ltd. | Method for measuring non-circularity at core portion of optical fiber parent material |
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