Spectro-goniometer

The Optronic Laboratories OL-750 is an instrument designed to measure angle-resolved scattering versus wavelength.


Operation

The sample can be rotated to vary the angle of incidence as well as lateral positioning of the sample.

The detector moves in the horizontal plane of the instrument and detects the scattered light in that direction for the given incidence angle of the sample.

Either a silicon or a lead sulfide detector is mounted on the detector arm, giving a choice of wavelength from 350-1100 nm or 1100-2500 nm.

Results

The data collected with this instrument can be used to calculate the bi-directional scattering distribution function (BSDF) for the sample.

Examples of use

Brushed aluminum venetian blind slats has been characterized using this instrument.

Anisotropic samples cannot be fully characterized due to the limited range of motion of the sample holder.

Below is a close-up on the intricate combination of motors that allow 5 degrees of sample movement.

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