Tablet-Coating Thickness
Convert THz round-trip delay into tablet-coating thickness.
Description
THz coating thickness uses a reflection delay interpreted as a round trip within one layer.
THz coating thickness uses a reflection delay interpreted as a round trip within one layer. The refractive index is supplied.1
Convert THz round-trip delay into tablet-coating thickness.
When to use Tablet-Coating Thickness
Use this tool to convert THz round-trip delay into tablet-coating thickness.
Prepare the optical measurements, geometry, fitted coefficients or caller-selected thresholds requested. Confirm wavelength, radius/diameter, pulse-width, angle and unit conventions before running the calculation.
How to use Tablet-Coating Thickness and understand its results
- Prepare the optical measurements, geometry, fitted coefficients or caller-selected thresholds requested. Confirm wavelength, radius/diameter, pulse-width, angle and unit conventions before running the calculation.
- Enter roundTripDelaySeconds, refractiveIndex using the field table and calculation rules, then run the tool.
- Read coatingThicknessMeters, coatingThicknessMicrometers. The explanation below defines the units, signs, ordering and any flags or placeholder values.
- If the tool reports an input issue, correct the values and run it again. Apply the stated assumptions when interpreting a successfully returned result.
| Input field | Meaning | Value type; see rules below | Requirement |
|---|---|---|---|
| roundTripDelaySeconds | Coating round-trip delay (s) | number; minimum: 0 | Required |
| refractiveIndex | Coating refractive index | number; minimum: 0 | Required |
Enter nonnegative delay seconds and positive refractive index. Return meters and micrometers using c=299792458 m/s.
thickness=c delay/(2n) Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| coatingThicknessMeters | Coating thickness (m) | number; minimum: 0 |
| coatingThicknessMicrometers | Coating thickness (µm) | number; minimum: 0 |
{
"input": {
"roundTripDelaySeconds": 1e-11,
"refractiveIndex": 1.5
},
"output": {
"coatingThicknessMeters": 0.0009993081933333333,
"coatingThicknessMicrometers": 999.3081933333333
}
}Limitations and assumptions
No coating echo identification, multi-layer reconstruction or dispersion correction is performed.
Numeric inputs must be finite. Follow the calculation-specific rules for overflow, underflow and exceptional cases. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors.
Alternative or Complementary methods
Use THz Time-of-Flight Depth: Convert a THz reflection delay into subsurface layer depth. For a complementary task, use THz Waveform Spectrum: Compute a direct discrete magnitude spectrum from a THz time-domain waveform.
References
-
Tablet-Coating Thickness — tool.io
Similar or alternative tools
- THz Time-of-Flight Depth
Convert a THz reflection delay into subsurface layer depth.
- THz Waveform Spectrum
Compute a direct discrete magnitude spectrum from a THz time-domain waveform.