spectrophotometer-ZK Nanotech ZJG Institute of Compound Semiconductors

spectrophotometer

Manufacturer：PerkinElmer

Model：LAMBDA 950

Performance specification:

Double beam, double monochromator, ratio recording UV/Vis/NIR spectrophotometer

Wavelength range 175～3300nm

All reflecting optical system (SiO2 coated) with holographic grating monochromator with 1440 Lines/mm UV/Vis blazed at 240 nm and 360 Lines/mm NIR blazed at 1100 nm, Littrow mounting, sample thickness compensated detector optics.

Stray Light <0.00007%T

Wavelength Accuracy ±0.08 nm (UV/Vis ) ，+/- 0.30 nm(NIR )

Wavelength Reproducibility ≤ 0.005 nm(Standard deviation of 10 measurements UV/Vis); ≤ 0.020 nm (Standard deviation of 10 measurements NIR )

Photometric Linearity > ±8A

Introduction

The spectrophotometer is an optical instrument for measuring the intensity of light relative to wavelength. Electromagnetic energy, collected from the sample, enters the device through the aperture and is separated into its component wavelengths by the holographic grating. Simply put, the grating acts to separate each color from the white light. The separated light is then focused onto a CCD array detector where the intensity of each wavelength is then measured by a pixel of the array. The CCD is then read-off to a computer and the result is a spectrum which displays the intensity of each wavelength of light.