Scatterometer - Light Tec

For 2D/3D scattered light measurements. 

A compact motorized optical system for scattering characterization of any kind of material. 

REFLET 90° 

REFLET Bench 

3D ( hemispheric) 

Scatterometer 

COMPLETE SYSTEM 

DELIVERED 

IN A DARK BOX 

APPLICATIONS REFERENCES 

→ Photorealistic rendering: accurate measurement of spectral 

behaviour 

→ Optical sensors: medical, industrial , quality control, 

automotive 

→ Reflector material characterization for luminaries design 

→ Reflector material characterization for automotive 

headlamps design 

→ Cosmetics characteristics: spectral and specular behaviour 

→ Roughness controls in production 

→ Quality control of dust/particules in semiconductor 

→ LCD Backlighting 

→ Scattering of transmitting glasses 

→ Aerospace applications, measurements of black paints, 

BRDF of mirrors 

REFLET 180° 

° 

ADC, Alanod , Alcan , Almeco, 

Automotive- Lighting, AUO, , Arcelor, 

Bourget, Ball Aerospace , BARCO , 

Chanel, Dupont , Entire, Essilor, Helbling, 

Hewlett Packard , Loepfe, 

STMicroelectronics , Procter&Gamble, 

PSA, 

University of Darmstadt, University of 

Madrid , Volkswagen, 

Espace Alexandra - 359 rue Saint Joseph - 83400 Hyères France 

Tel : +33 (0) 494 121 848 Fax : +33 (0) 494 121 849 E mail : sales@lighttec.fr web : www.lighttec.fr

REFLET is a compact, motorized optical system for scattering characterization of any kind of 

material and objects. It allows, in a fast and easy way, to measure luminous energy distribution, or 

spectral composition contained in the scattering lobes, and consequently characterizes surfaces of your 

examined regions such as roughness, defects, as well as types of coatings or paintings… 

Moreover, the system measures BRDF/BTDF which perfectly represents the way any surface scatters 

incoming light in 3D space. 

Diffuser 

The measurements are done in reflection and in transmission. 

The knowledge of the way light is reflected and transmitted trough a 

diffuser is very important for the use of this material in optical systems. 

Aluminum 

Reflector material can have quite 

complex behaviour depending on 

the plane of incidence . Reflet 

allows incidence parallel and 

perpendicular to stripes accurate 

measurements ( anisotropic 

material, polarization dependence) 

Ophthalmic glasses 

The knowledge of the scattering of 

specular surfaces (mirrors), transparent 

surfaces (glasses, lenses, crystals) with 

sometimes a very low scattering of 10 -9 , 

is very difficult to measure without a 

high dynamic detection system, like the 

Reflet bench, which allows to measure 

BRDF of 10 -5 . 

Intensity [U.A] 

600 

500 

400 

300 

200 

100 

0 

-90 

-77 

1E+12 

1E+11 

1E+10 

1E+09 

1E+08 

1E+07 

100000 

0 

100000 

10000 

1000 

100 

10 

1 

0.01 

-64 

-51 

-38 

-25 

-12 

1 


Tel : +33 (0) 494 121 848 Fax : +33 (0) 494 121 849 E mail : sales@lighttec.fr web : www.lighttec.fr 

14 

27 

40 

53 

66 

79 

Scattering curves of transparent lenses 

0 10 20 30 40 50 60 70 80 90 

0.1 

Diffusion Angle [deg] 

5° 

15° 

45° 

X 

Y 

Z

Cosmetics 

Cosmetic manufacturers needs to compare different chemical mixture to produce lipsticks or creams. REFLET 

allows to characterize this product on different skin and under different lighting ( different spectra) 

Illumination design software 

Illumination design software require accurate data to provide accurate simulations.Reflet provides 2D/3D 

BRDF or BTDF files to ready to be export to TRACEPRO, ASAP, LIGHTTOOLS or import in , LucidShape, 

PhotoPia or SPEOS. 

Realistic rendering software 

X 

Y 

Z 

In many industries including Automotive industry, interaction of light with materials is very important, in 

headlamps, tail lamps, dashboards, and the optical simulations made by designers, developers with their 

illumination design software, their realistic rendering software need scattering data to perform simulations and 

get results. 

Unfortunately, only theoretical data are available right now, and simulation results are not relevant of reality. 

It is why we have developed the REFLET Bench to answer all these problems. 



ILLUMINATION 

Light Box o Halogen 100W light box 

o Option : 6-position filter wheel (color and ND filters) 

Spot size on the sample surface 

Beam aperture angle 

Goniometer 

TECHNICAL SPECIFICATIONS 

o Scattering configuration : Manually adjustable from Ø1 mm to Ø13 mm 

o Quasi-Specular configuration: Manually selectable Ø0.5mm Ø1mm Ø1.9mm 

o Scattering configuration : Manually adjustable from ±0.15° to ±2.26° 

o Quasi-Specular configuration: Manually selectable ±0.009° ±0.035° ±0.5° 

Standard Version 

REFLECTION MODE 

o 0°-90° motorized 

o Angular resolution: selectable ( 0.1°/1°/10° ) 

o Positioning precision: 0.5° 

TRANSMISSION MODE 

o Fixed, θ=180° 

Optional upgraded version: 

o 0°-180° motorized (REFLECTION & TRANSMISSION) 

o Angular resolution: selectable ( 0.1°/1°/10° ) 


DETECTION 

Integrated-flux Detector • Visible channel : 400- 1000 nm, dynamic 10 4 or 10 9 

• Infra Red channel : 900- 1700 nm , dynamic 10 6 

Spectrograph (option) o Useful range: 420-900 nm or 900 – 1700 nm 

o Spectral resolution: selectable (0.6 nm/1 nm/5 nm/10 nm) 

Optical system o Scattering configuration : 

3 manually interchangeable optical blocs ( 2 to be chosen) 

Optical bloc 1 2 3 

Angular acceptance ± 2° ± 1.1° ± 0.04° 

Observed area size Ø14mm Ø8mm Ø6mm 

o Quasi-Specular configuration: 

Observed area size : Manually selectable Ø0.5mm Ø1mm Ø1.9mm 

Beam angle : Manually selectable ±0.009° ±0.035° ±0.5° 

Goniometer o θ: -90° to 90° motorized 

o φ: -90° to 90° motorized 

o Angular resolution: selectable ( 0.1° /1° /10° ) 


Polarizer/Analyzer set (option) o Rapid insertion 

o 0°-90° manual rotation 

MEASURING TIME 

180° θ-profile o “Integrated flux” mode: 45 s 

o “Spectrograph” mode: 10 s

Scatterometer - Light Tec

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