Absolute Reflectance Accessory

The Absolute Reflectance accessory does not require reflectance standards due to its unique V / W optical arrangement. The beam in the V position reflects from the reference mirror. In the W position it is reflecting from the sample twice and the same reference mirror at 12°. The absolute reflectance of a sample is then the square root of the measured value at a given wavenumber or wavelength. The two configurations are easily selected by rotating the sample holder 180 degrees with its pinned-in-place mount.

• Measurement of absolute reflectance of optical surfaces
• Fixed 12 degree angle of incidence
• Classic VW design