Manual Reflectance Measurement Syetems

  • Product No:191F
  • Manufacturer:Gamma Scientific

Gamma Scientific provides a unique, high performance option for reflectance and transmission testing. These systems capture complete spectral and colorimetric properties of thin film coatings with scan times typically less than one second.


Multi-layer film thickness and sample flatness can also be monitored in parallel.


Reflectance and Transmission test systems from Gamma Scientific are available in several configurations. Depending on the sample type and desired measurement result, a variety of system configurations are available for testing either polished (specular) or rough (diffuse) samples. A production selection guide is included in this brochure to help in configuring the best system for your needs.


These systems are ideal for manufacturers who need to obtain fast and accurate measurements of flat panel display glass, anti-reflection coating inspection, photovoltaic (solar cell) coatings, optical filters, lens coatings, paint samples, diffuse plastics and more.


Regardless of the sample, Gamma Scientific offers a solution for your reflectance or transmission measurement needs.


  • Angular Reflectance measurements from 380-1700 nm

  • Calibrated glass sample

  • Viewing eyepiece

  • Fiber Optic coupling to measurement equipment

  • Regulated quartz Halogen illumination lamp 

191F Reflectance Measurement Systems
191 Optical Head191F-0191F-10191F-20191F-45
Measurement TypeTotal Specular ReflectionFirst Surface or Total
Specular Reflection
First Surface or Total
Specular Reflection
First Surface or Total
Specular Reflection

Sample TypesGlass, Plastic, Metal,
Polished Substrates
Glass, Plastic, Metal,
Polished Substrates
Glass, Plastic, Metal,
Polished Substrates
Glass, Plastic, Metal,
Polished Substrates

Illumination Angle10°20°45°
Viewing Angle10°20°45°
Minimum Sample ThicknessNone (transparent samples)
None (opaque samples)
0.5mm (transparent samples)
None (opaque samples)
0.35mm (transparent samples)
None (opaque samples)
0.15mm (transparent samples)
None (opaque samples)

Maximum Sample ThicknessNoneNoneNoneNone
Minimum Sample SizeNone2.0″ (50mm) diameter
or 1.75″ x 1.75″
(45 x 45mm) square
2.0″ (50mm) diameter
or 1.75″ x 1.75″
(45 x 45mm) square
2.0″ (50mm) diameter
or 1.75″ x 1.75″
(45 x 45mm) square

Maximum Sample SizeMaximum 3.0in (75mm)
diameter
NoneNoneNone
Spectral Range365nm-1100nm365nm-1100nm365nm-1100nm365nm-1100nm
Illumination Spot Size
(Area of Analysis)
Ø 0.5mm1mm x 10µm1mm x 10µm1mm x 10µm
Measurement Speed
(Sample Dependent)
≈500-10000ms≈300-3000ms≈300-3000ms≈300-3000ms
Calibration Reference Standard1″ (25mm) BK-7 .
Polished Glass
6″ (150mm) BK-7
Polished Glass
6″ (150mm) BK-7
Polished Glass
6″ (150mm) BK-7
Polished Glass

Optical Head DimensionsHeight: 375mm (15″)
Width: 300mm (12″)
Depth: 300mm (12″)
Weight: 2.25kg (5lbs)
Height: 230mm (9″)
Width: 150mm (6″)
Depth: 150mm (6″)
Weight: 1.6kg (3.5lbs)
Height: 230mm (9″)
Width: 150mm (6″)
Depth: 150mm (6″)
Weight: 1.6kg (3.5lbs)
Height: 230mm (9″)
Width: 150mm (6″)
Depth: 150mm (6″)
Weight: 1.6kg (3.5lbs)

Accuracy
Spectral Reflectance± 0.2%± 0.2%± 0.2%± 0.2%
Tristimulus
(CIE 1931 X, Y, Z)
± 0.05± 0.05± 0.05± 0.05
Chromaticity
(CIE 1931 x,y)
± 0.002± 0.002± 0.002± 0.002
LAB Color
(CIE 1976 L*, a*, b*)
L* ± 1.0 a*, b* ± 0.8L* ± 1.0 a*, b* ± 0.8L* ± 1.0 a*, b* ± 0.8L* ± 1.0 a*, b* ± 0.8
Average Reflectance± 0.1± 0.1± 0.1± 0.1
Reported Parameters
Spectral DataReflectance as a function of wavelength
Colorimetric DataCIE Tristimulus X, Y, Z, with 2° or 10° View Angle, (L*, a*, b*), (x, y), (u’, v’), and other parameters
Illuminant WeightingIlluminant A, Illuminant B, Illuminant C, Illuminant D65, or User Specified Custom Illuminant