et

βImin

1 symbol

Terminological databases

Metroloogia terminibaas

ID 1143234 Last modified 17.05.2025
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βImin symbol

Metroloogia terminibaas

ID 1143233 Last modified 10.06.2026
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Domain Standardisation - Metrology
  • rõngasvalgustuse minimaalne langemisnurk, millest mõõteobjekti pind on valgustatud
  • minimum incident angle of ring light illumination from which the specimen is illuminated
  • angle between the optical axis the light rays of the ring light that illuminate the sample farthest to the optical axis
rõngasvalgustuse minimaalne langemisnurk
Usage examples
  • Rõngasvalgustuse minimaalne langemisnurk sõltub selle disainist ja otstarbest. Madala nurga all (tumeväljaga) rakenduste puhul, mida kasutatakse pinnadefektide või pinnakonaruste esiletõstmiseks, on minimaalne langemisnurk sihtpinna tasapinna suhtes tavaliselt 50 kuni 200.
  • Rõngasvalgustuse minimaalne langemisnurk on mõõteobjekti pinnaga peaaegu risti oleva nurga all, et rõhutada pinna ebakorrapärasusi.
βImin symbol
minimum incident angle of ring light illumination
Usage examples
  • The minimum incident angle of a ring light depends on its design and purpose. For low-angle (darkfield) applications used to highlight surface defects or edges, the minimum grazing angle typically ranges from 50 to 200 from the target surface plane.
βImin symbol

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