UV Filter Film Percentage Requirement Calculator
Resolve required UV filtering while separately accounting visible attenuation, since UV per lumen changes with both; supplied spectra/content are measured assumptions, not film performance certification.
Description
UV content per lumen changes when a film transmits visible light differently from UV.
UV content per lumen changes when a film transmits visible light differently from UV. UV rejection cannot be calculated from visible transmission alone.
Resolve required UV filtering while separately accounting visible attenuation, since UV per lumen changes with both; supplied spectra/content are measured assumptions, not film performance certification.
When to use UV Filter Film Percentage Requirement Calculator
Use this tool to resolve required UV filtering while separately accounting visible attenuation, since UV per lumen changes with both; supplied spectra/content are measured assumptions, not film performance certification.
Prepare the collection, exposure, scheduling or financial records required for this calculation. Keep row order and the declared units consistent.
How to use UV Filter Film Percentage Requirement Calculator and understand its results
- Prepare the collection, exposure, scheduling or financial records required for this calculation. Keep row order and the declared units consistent.
- Enter sourceUvContent, filmVisibleTransmissionFraction, callerMaximumFilteredUvContent using the field table and calculation rules, then run the tool.
- Read maximumUvTransmissionFraction, minimumUvRejectionPercent. 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 |
|---|---|---|---|
| sourceUvContent | Source uv content | number | Required |
| filmVisibleTransmissionFraction | Film visible transmission fraction | number | Required |
| callerMaximumFilteredUvContent | Caller maximum filtered uv content | number | Required |
Use positive source content and visible transmission in (0,1], with nonnegative permitted filtered content. Return allowed UV fraction and minimum rejection percentage.1
maximum UV transmission = min(1,maximum filtered content × visible transmission/source content) Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| maximumUvTransmissionFraction | Maximum uv transmission fraction | number |
| minimumUvRejectionPercent | Minimum uv rejection percent | number |
{
"input": {
"sourceUvContent": 100,
"filmVisibleTransmissionFraction": 0.8,
"callerMaximumFilteredUvContent": 25
},
"output": {
"maximumUvTransmissionFraction": 0.2,
"minimumUvRejectionPercent": 80
}
}Limitations and assumptions
Measured spectral assumptions and a caller limit do not certify film performance.
Numbers and computed results must be finite; overflow produces an error. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors.
Alternative or Complementary methods
Use UV Content Microwatts per Lumen Checker: Audit measured UV irradiance divided by matched illuminance under caller content limit; zero illuminance leaves the ratio undefined, not a safe material classification. For a complementary task, use Annual UV Dose Exposure Accumulator Calculator: Accumulate matched UV content×lux×hours with separate filter transmissions; conversion is 0.0036 J/m² per µW/m²-hour, not lux-hours alone or predicted fading.
References
Similar or alternative tools
- UV Content Microwatts per Lumen Checker
Audit measured UV irradiance divided by matched illuminance under caller content limit; zero illuminance leaves the ratio undefined, not a safe material classification.
- Annual UV Dose Exposure Accumulator Calculator
Accumulate matched UV content×lux×hours with separate filter transmissions; conversion is 0.0036 J/m² per µW/m²-hour, not lux-hours alone or predicted fading.