BSDF Goniophotometer

/ SOLUTIONS / GONIOPHOTOMETERS / BSDF goniophotometer

Goniophotometer for measuring the reflection properties of materials

BSDF-goniometer (Bidirectional Scattering Distribution Function) is a goniometer for analyzing the scattering of light  on materials. The instrument measures the reflection (BRDF) and transmittance (BTDF) in various angles and various wavelengths.

The detector is rotated around two axes (azimuth and elevation), and the light source around one axis (elevation), the sample being hold steady. The measurement results a 3-dimensional array in BSDF file format that can be used with simulation tools such as Zemax, Speos and LightTools.

Main Features of SSL BSDF.R Goniometer

• A goniometrical assembly motorized from -90° to +90° (two axes for azimuth and elevation angles) for detector
• Measurement time of one azimuth plane:
• 10s @ elevation angle step 0.1°
• 7s @ elevation angle step 0.2°

• SSL MC-200-BT 3-axis stepper motor controller
• Android based remote control for motion control MC-200-BT
• Dark cabinet (1.1 m x 1.0 m x 2.0 m) with 19" rack 10U free pos.
• SSL BSDF software
• BSDF file format compatible with Zemax, Speos, LightTools.

Detector

• LC.800.1 photocurrent meter
• LH1010 Silicon photodetector.
• Detection range 300-1050nm
• Aluminum fiber reflecting collimator for collection optic
• Optical Fiber, 2m, 300-1200nm.

Reflectance Standard, 1pc

• BaSO4 coated reflectance standard
• Lambertian angular reflectance with R>95%
• Reflectance area: Diameter 34mm
• Cover cap included.
• Reference calibration included.

Light Source

• Different illumination angle settable up to 70°
• Goniometrical assembly motorized from 0° to ±90° for light source
• Standard set of Light source of type SSL LS MH-42.LED1_xxx_A_NN
• Optical fiber input collimator optics
• Neutral white LED, Ra 84, CCT 4000 K
• Single color LEDs peaked at 405 nm, 454 nm, 530 nm, 625 nm, 660 nm, 720 nm, 850 nm, 950nm
• Manually exchangeable light source.
• Spot size Ø10 mm
• Dead angle ~2.2° in reflectance measurements.

Options

• Models with one or two rotational axis
• S-680.VRW Spectroradiometer integration as single angle measurement
• Custom light source input for fiber.
• BSDF.Mon, Monitor detector for the light source using bifurcated fiber.
• BSDF.DET – Custom detector sub-assembly collimator

• WL ranges: e.g. 400-650 nm, 650-1050 nm, 1050-1650nm
• Motorized photodiode selector
• Mounting holder for fixing fiber and collimator onto the gonio
• Optical fiber SMA905 core Ø1mm
• Measuring head box 
• Si and InGaAs photodiodes (SMA inputs or beam splitter)