NRIseries IR Refractive Index Measurement System

NRIseries

Global Site> Optical Evaluation System > NRIseries IR Refractive Index Measurement System

NRI series　 IR Refractive Index Measurement System

Measurement of refractive index of infrared window, infrared lens, chalcogenide glass

Based on the minimum deviation method (Fraunhofer method),monochromatic light of arbitrary wavelength (1 to 14µm）is irrdiated to a prism shaped sample, and the angle of transmitted light with respect to incident light is measured to measure the refractive index of the sample. The newly deve

Catalog（PDF）

Features

High precision measurement of the refractive index (0.0001) is possible in the wavelength range 1 to 14µm

Equipped with a temperature control function, the system can measure the difference i refractive index with temperature.

Measurement Items

Measurement Data

Block Diagram

Measurement Principle

Specifications

Measurenment method	Monimum deviation ( Draunhofer method )
Measurement Items	Refractive index, Apex angle ・Changes in refractive index by wavelength(dn/dλ）・Changes in refractive index by sample temperature(dn/dT）
Refractive index measurement range	1～4
Measurement precision	0.0001（1×10^-4）
Measurement wavelength range	1～14μm
Irrdiation wavelength range	400nm～20µm*1
Temperature control range	-40～80℃*2
Irrdiation size	approx.Φ8mm
Measurement functions	Apex angle, Determination of minimum deviation position, Refractive index
Measurement mode	1point measurement, WL dependence, Temperature denpendence
Setting parameters	Wavelength, Temperature, Expected refractive index
Saving format	Text format ( CSV format )

*1　In order to perform measurement in 14 to 20µm, it is necessary to add a higher order light cut filter.
*2　Due to the set temperature of the temperature controller, it may differ depending on the measurement sample.

Standara Configuration

●Caramic heater light source
●Halogen lamp light source
●Helium lamp（ｄ line 587.56nm）
●Light source converging system
●Monochromator and gratings
●Irrdiation optical system
●Laser for apex angle measurement
●Rotating stage and controller
●Sample holder
●Temperature control stage and controller
●Lock-in amplifer
●Sample compartment and frame
●Detector
●General controller
●Software
●Control PC

Unilities

　
●Main unit：Approx.W1800×Ｄ900×H1800mm
　　　　　　＊Excluding PC and rack＊