Spectrophotometer

Agilent

Cary 7000 Universal Measurement Spectrophotometer (UMS)

Spectroscopy

Optics, thin films and coatings. Film thickness control, bulk optic performance and characterization. Optical constant measurements (refractive index, n and k), etc.

Monochromator: double out-of-plane Littrow monochromator

Grating: 70 x 45 mm

• UV-Vis: ruled line diffraction grating, 1200 lines/mm blazed at 250 nm
• NIR: ruled line diffraction grating, 300 lines/mm blazed at 1192 nm

Beam splitting system: rotating beam splitter, which measures a sample, dark and reference signal per cycle with a speed of 30 Hz

 

Detectors

• UV-Vis:  R928 PMT
• NIR:  cooled PbSmart PbS

Limiting resolution (nm)

• UV-Vis:  <0.048 nm
• NIR:  <0.2 nm

 

Wavelength range (nm): 175–3300 nm

(N₂ purge required below 185 nm)

 

Wavelength accuracy (nm)

Deuterium lamp lines

• UV-Vis: 190–900 nm ± 0.08 nm
• NIR: 760–3000 nm ± 0.4 nm

 

The spectrophotometer is equipped with Cary Universal Measurement Accessory (UMA)

Cary UMA Specification

Measurement Modes:

• absolute specular reflection at variable angle from 5 to 85 degrees in 0.02 degree intervals
• direct transmission and variable angle transmission from 0 to 180 degrees in 0.02 degree intervals
• diffuse scattering, reflection or transmission through independent sample rotation (360 degrees) and detector positioning (10 – 350 degrees) at 0.02 degree intervals
• absorptance, A where A= 1 – R – T at variable angle without moving the sample or beam onto the sample for improved productivity and greater accuracy
• reflection/transmission at single wavelength (read) or wavelength range (scan)

Wavelength range: 190 – 2800 nm

Auto polarizer wavelength range: 250 – 2500 nm

Detectors: two-colored Si/InGaAs

Aperture masks:

• incident beam: 1, 2 and 3 degrees
• detector: 1, 1.8, 2, 3, 4, 4.4, 5 and 6 degrees