The Illuminator reflectance lamp is a light source engineered precisely for accurate indoor diffuse reflectance measurements acquired with the FieldSpec® line of spectroradiometers. This very stable light source addresses a broad range of spectral analysis applications needing artificial illumination without making physical contact with the sample.

The Illuminator offers stable illumination across the complete spectral range of the FieldSpec series for reliable diffuse reflectance measurements. Its unique design creates stable output with a smooth spectral curve into the SWIR range and reduces backscatter and any change of lamp energy output over time. The lamp creates a distinct beam to maximize the amount of light energy on a sample area while diminishing stray light from surrounding surfaces.

Illuminator Benefits

  • The 70 watt quartz-tungsten-halogen light source with integrated reflector creates stable illumination over the 350 to 2500 nm range
  • Stable output yields accurate and reliable reflectance measurements
  • Precise voltage regulation for high stability light output
  • Well-defined beam make the most of light energy on sample area
  • Many mount options for lab stands or tripods

ASD Illuminator reflected radiance from the 99% reflectance Spectralon® test panel.

Figure 1. ASD Illuminator reflected radiance from the 99% reflectance Spectralon® test panel.

Variable lamp height enables a broad range of illumination levels to duplicate outdoor solar conditions for vegetation analysis or higher output for more thermally stable samples. This is the ideal lighting accessory for non-contact reflectance measurements in a controlled indoor environment for materials such as reflective or painted surfaces, soil, vegetation, fragile mineral and fossil specimens, and delicate documents.

The lamp assembly is a pre-aligned system packed with an integrated reflector and an optical window for dust-free operation. A soft start feature fades the current on/off to the filament to prolong bulb life, which is rated to 1,340 hours and equates to over 160 full days of regular use. The Illuminator is designed for simple usage and lamp replacement. Mounts are added into the design to enable the use of a light stand or tripod.

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