Optical thin film design software TFV
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Simple calculation tools

Convert relative reflection to absolute reflection

Convert relative reflectance to absolute reflectance for spectrophotometer measured value.


1. Measurement method:
Normal (Reference=100)
Reverse (Sample=100) When set the reference and the sample vice versa.

2. Reference glass:


3. Wavelength(nm):


4. Measurement value (Relative reflectance):




Result (Absolute reflectance):

Excel version is here: reltoabs.xls

Substrate Index

Calculate the refractive index of a substrate without absorption

Calculate refractive index of substrate from reflectance or transmittance of non-coated substrate.

1. Measurement method:
One side reflectance
Both side reflectance (Both side polish surface substrate)
Both side transmittance (Both side polish surface substrate)

2. Measurement value(%):




Result (Refractive index of substrate):

Excel version is here: substindexcalc.xls

 

Calculates the refractive index, absorption coefficient, and internal transmittance of a substrate with absorption

Excel version is here: Subst_nkTi_Calc.xlsx

Mean Free Path

Calculate Mean Free Path.


1. Kind of gas:


2. Temperature(Celsius, ℃):


3. Pressure(Pa):

Input format: 0.001 or 1e-3



Result:
Mean Free Path (m)
Mean Velocity (m/s)
Impingement rate (pcs/s*m2)

References: 真空技術実務読本 オーム社, Japan

Color Calculation

Calculate the color system values from XYZ tristimulus values.


1. Observer:


2. Illuminant:


3. XYZ:
X:
Y:
Z:




Result:
x , y

L* , a* , b*
, C* , h

Hunter L , a , b

L* , u* , v*
, u' , v'

sRGB R , G , B

Calculate XYZxy L*a*b* from spectrum values. (Excel sheet)

colorcalc-v30.xlsx
ColorCalcExcel

Smartphone app

Thin film calculation tool for Android smartphones.

Optical thin film calculator
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