2 December 2024

Varian UV-VIS-NIR Spectrophotometer System (Optical Characterization)

The Varian UV-VIS-NIR Spectrophotometer system is an optical characterization tool that can measure the reflection, transmission, and absorption spectra of both solid and liquid samples. The spectra obtained from this system can be used to calculate parameters such as material thickness, bandgap, absorption coefficient, refractive index, and more.

Key Features:

• Solid Sample Holder for Transmission Measurements
• Internal Diffuse Reflectance Accessory (DRA 900-DRA 2500)
  • Wavelength range: 200–900 nm for DRA 900; 200–2500 nm for DRA 2500
  • UV-VIS: R928 PMT for DRA 900; R928 PMT, TE# cooled InGaAs detectors for DRA 2500
  • Sphere radius: 110 mm
  • PTFE coating (density: 1 gr/cm³, thickness: 4 mm)
  • Reflectance aperture radius: 16 mm
  • Sample capacity: Minimum 88 mm x 12 mm, Maximum 100 mm x 200 mm
• Absolute Smooth Reflectance Accessory
  • Wavelength range: 175–3300 nm
  • Incident angle: 7º
  • Minimum reflectance radius for double reflections: 25 mm, single reflections: 12 mm
  • Maximum sample thickness: 35 mm
  • Sample compartment dimensions: Maximum sample capacity corresponds to the width and height of the compartment
• External Smooth Reflectance Accessory (HARRICK ERA 30G and 60G)
  • Two sets with incident angles of 30º and 60º
  • Masks with radii of 3, 6, 13 mm for examining small areas of large samples or small samples
  • Can be mounted both on the solid sample holder and the surface
• Light Source:
  • Tungsten halogen lamp and deuterium arc lamp for broad spectrum coverage
  • Schwarzschild dual optics for maximum light transmission
• Detector:
  • UV-VIS: R928 photomultiplier tube (PMT)
  • NIR: Peltier-cooled PbS photodetector
• Advanced Electronics Design
• Wide Sample Compartment
• Double Littrow Monochromator
• Optical Isolation System
• Grating System:
  • 1200 gr/mm grating for UV-VIS at 250 nm
  • 300 gr/mm grating for NIR at 1192 nm

This system is ideal for high-precision optical characterization in the UV-VIS-NIR spectral regions, providing valuable insights into the optical properties of materials and samples.