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OPTICAL FLATS PARALLEL SETS - PARALLEL TO .000004" | ||
Type of Set | Size | EDP No. |
Set Op-2AA, two parallels | 1" x 1/2" | V839901 |
Set Op-2B, two parallels | 1-1/4" x 1/2" | V839903 |
Set Op-2C, two parallels | 1" x 1" | V839905 |
Flats in optical parallel sets differ in thickness by approximately 0.0125”, providing a parallelism check at two spindle positions, each one-half turn apart. For metric micrometers, the difference is 0.25 mm.