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GorgiasUV - Reflectance Spectroscopy system

The Reflectance Spectrometer GorgiasUV is based on the standard Gorgias system but it is optimized to cover a wider range into the UV, up until 200 nm.
GorgiasUV explores with much more reliability the extreme part of the UV spectrum, providing helpful information for pigments identification.
Along with the usual halogen lamp, GorgiasUV features a Deuterium light source and a dedicated solarization-resistant fiber probe to effectively work within the UV range.

Intro to Reflectance Spectroscopy

Used since the late 1980s, Reflectance Spectroscopy (RS) is a powerful tool for the identification of pigments and dyes. A reflectance spectrum represents, for each wavelength, the ratio between the intensity of the reflected light and that of the incident light. This ratio, known as reflectance, is expressed as a percentage (%).

Pigments are identified by comparing the spectral features of an unknown sample with reference spectra stored in a spectral database.

One of the main advantages of this method, compared to other spectroscopic techniques, is that the instrumentation is relatively affordable, compact, and portable, making it particularly suitable for in situ analysis.

Technical specifications

Spectrometer
Weight: 430 grams
Dimensions: 102 mm x 84 mm x 59 mm
Detector: Toshiba TCD1304DG linear array (no interference pattern)
Detector spectral range: 300 – 1000 nm (100 microns slit)
Pixels: 3648
Pixel size: 8 um x 200 um
Pixel well depth: 100,000 electrons
Signal-to-noise ratio: 400:1 (10000:1 with averaging)
A/D resolution: 16 bit
Fiber optic connector: SMA 905 to 0.22 numerical aperture single-strand optical fiber.
Diffraction order sorting filter: included
Exposure time: 10 us – 60 s
CCD reading time: 14 ms
Power consumption: 100mA @ 5V from USB interface
Onboard memory capacity: 64 spectra
Data transfer speed: 200 ms / 100 ms (2 points binding)
Computer interface: USB 2.0, HID 2.0
Operational system: Windows 10 /Windows 8 / Windows 7 / Vista / XP ; 32/64b
Software: application software, driver,
Hardware: USB cable

Reflection fiber probe
Stainless steel tubing for extra strength. 7 x 600 microns core fibers (6 excitation fibers, 1 collection fiber). It is 1 meter long and it has a 45 degr. adapter for reflectance measures.

Light Source
Along with the usual halogen lamp as in standard Gorgias, GorgiasUV features a Deuterium radiation source and a dedicated solarization-resistant fiber probe to effectively work within the UV range.

Free Pigments Spectra Database

The system includes a reflectance spectra library of historical pigments selected in Pigments Checker, enabling immediate comparison with your acquired spectra. The database is continuously expanding, and free of charge.

Testing GorgiasUV on Pigments Checker

This note discusses the advantages of GorgiasUV over the standard Gorgias by testing the 2 instruments on the Pigments Checker, our collection of historical pigments.

DOWNLOAD Application note #1: Testing GorgiasUV on Pigments Checker (578 downloads )