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This Japanese Industrial Standard specifies the optical parallels made of transparent glass having parallel and flat measuring surface to be used for measurement of flatness and parallelism by optical wave interference, hereinafter referred to as the 'parallels'.
| Author | JSA |
|---|---|
| Editor | JSA |
| Document type | Standard |
| Format | File |
| Confirmation date | 2016-10-20 |
| ICS | 17.180.30 : Optical measuring instruments
|
| Number of pages | 3 |
| Year | 1970 |
| Document history | |
| Country | Japan |
| Keyword | JIS 7431;7431;JIS B 7431-1977 |