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SCHOTT® Solar Glass
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Technical Details of SCHOTT® Solar Glass

Developed for space, SCHOTT® Solar Glass offers a wide range of technical advantages. It ensures long-term stability, optical performance and reliable protection, supporting photovoltaic systems throughout their entire mission or service life.

Designed to endure space – and beyond

Protection against radiation

Solar and ultraviolet radiation, as well as charged particles, can gradually degrade photovoltaic materials. SCHOTT® Solar Glass provides reliable shielding and long-term material stability, preserving optical and electrical performance under demanding environmental conditions.

Solarization stability

Prolonged exposure to charged particles and UV radiation can cause glass darkening over time. SCHOTT® Solar Glass is engineered to resist solarization and discoloration, maintaining optical clarity and stable transmission for consistent efficiency throughout its lifetime.

High light transmittance

SCHOTT® Solar Glass combines excellent transmittance from UV-A to near-infrared with long-term spectral stability. It ensures that solar and optical systems capture maximum usable light, supporting dependable energy generation and optical precision.

High surface quality

The uniform, fire-polished surface of SCHOTT® Solar Glass minimizes surface roughness while supporting high-precision bonding and coating processes.
Material Properties SCHOTT® Solar Glass 0787
Material Properties SCHOTT® Solar Glass sphere
Material Properties SCHOTT® Solar Glass exos
Products
Geometrical properties Unit Value
Thickness*  mm 0.150 | 0.125 | 0.100 | 0.075

* Other thicknesses on request

 

Optical properties Unit Value
Refractive index nd   1.5080 
Edge wavelength λc (τ = 46 %) at t = 0.100 mm  nm

332

 

Thermal properties Unit Value
Transformation temperature Tg
 °C 568
Coefficient of thermal expansion - CTE α(20; 300 °C) 10-6 K-1
 8.5

 

Mechanical properties
  Unit  Value
Density ρ  g/cm³ 2.51 
Young's modulus E  kN/mm²  70.0
Poisson's ratio µ    0.216


Spectral transmittance of SCHOTT® Solar Glass 0787

Graph showing the spectral transmittance of SCHOTT® Solar Glass 0787 between 200-3,200 nm wavelength

 

Graph showing the spectral transmittance of SCHOTT® Solar Glass 0787 between 200-500 nm wavelength

  

Geometrical properties Unit Value
Thickness* mm 0.150 | 0.100 | 0.070 | 0.030

* Other thicknesses on request

 

Optical properties Unit Value
Refractive index nd 1.5231
Edge wavelength λc (τ = 46 %) at t = 0.100 mm nm

308

  

Thermal properties Unit Value
Transformation temperature Tg °C 557
Coefficient of thermal expansion – CTE α(20; 300 °C) 10-6 K-1 7.2

 

Mechanical properties
 Unit Value
Density ρ g/cm³ 2.51
Young's modulus E kN/mm² 72.9
Poisson's ratio µ 0.21

 

Spectral transmittance of SCHOTT® Solar Glass sphere

SCHOTT® Solar Glass sphere-Graphic-Transmittance-250-2000nm

 

SCHOTT® Solar Glass sphere-Graphic-Transmittance-250-500nn.png

Geometrical properties Unit Value
Thickness* mm 0.150 | 0.100 | 0.050

* Other thicknesses on request

 

Optical properties Unit Value
Refractive index nd 1.5145
Edge wavelength λc (τ = 46 %) at t = 0.100 mm nm

344

   

Thermal properties Unit Value
Transformation temperature Tg °C 557
Coefficient of thermal expansion – CTE α(20; 300 °C) in 10 K-1 6.9

 

Mechanical properties
 Unit Value
Density ρ g/cm³ 2.54
Young's modulus E kN/mm² 74.5
Poisson's ratio µ 0.218

 

Spectral transmittance of SCHOTT® Solar Glass exos

SCHOTT® Solar Glass exos-Graphic-Transmittance 200-2000 nm-ENG

 

SCHOTT® Solar Glass exos-Graphic-Transmittance 200-500 nm-ENG

 

SCHOTT® Solar Glass is available as:

  • Sheets
  • Cut-to-size substrates
  • AR-coated substrates

To find out more, please see the related products on the overview page.

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Whether you need more information, samples, a quote, or advice for a project, we would be delighted to talk to you.

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