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Zenith Polymer® – Diffuse Reflectance Standards

  • Nearly ideal lambertian, diffuse reflectance from 2,5 % to 99 %
  • Constant reflection over the wavelenght range 250 – 2450 nm
  • Tolerance in reflectance value depending on batch in range of +/- 3 %
  • Certified calibration using a PerkinElmer Lambda 950, which is traceable to PTB and NIST
  • Surface reflectivity is constant in range of +/- 1 % R
  • Laser damage threshold: 8 J/cm²  pulsed laser

Short Description

SphereOptics diffuse reflectance standards are made from our proprietary Zenith Polymer reflectance material. This highly reflecting, PTFE-based material is resistant to heat, humidity and exposure to high levels of radiation, making it ideal for use as reflectance standards. Those are available in two sizes of 50 mm and 30 mm diameter with reflectance values of 99 %, 80 %, 60 %, 50 %, 25 %, 10 %, 5 % and 2.5 %. Standards are sold individually or in sets of two, four or eight standards with a free choice of reflectance values. Each standard is packaged in a durable holder with a protective cover and comes in a storage box.

Properties

  • Non-polar, insulator, hydrophobic
  • Chemically inert, exception: reacts with organic Lithium and Sodium compounds
  • Usable temperature range: – 50 °C to 250 °C
  • Usable humidity range: 5 % to 95 %, but water absorption bands will be visible
  • Standard pore sizes 1 – 20 μm, average 6 μm, Standard pore sizes 1 – 20 μm, average 6 μm

Applications

  • Diffuse reflectance standards for light measurements and calibration
  • Definition of contrast for cameras calibration
  • Calibration of integrating sphere systems
  • Calibration of spectrometers, photometers and radiometers
  • Environment laser targets
  • Environment test targets
  • Light source characteristic and behavior
Specifications
Temperature Range (°C) Thermal Linear Coefficient @ 10-5 (1/K)
from  to
-100  -50 7.8
-50 10 9.1
10 30 23.7
30 100 10.8
100 200 14.0
200 260 22.9
260 300 39.3
30 200 12.7
30 260 15.4
30 300 18.4