Institute for Single Crystals

National Academy of Sciences of Ukraine

61001, Ukraine, Kharkiv, 60 Nauky Ave., phone/fax: +38(057)340-86-19, e-mail:

We offer

Product innovation

Monodisperse Spherical Heteroparticles Nano-powders of "Core-Shell" Type


Materials and Products - Large-Size Sapphire Crystals

click picture
to enlarge

Optical Square Sapphire Windows and Blanks

Optical square sapphire windows and blanks with size (10...350)x(10...500) mm2 and thickness to 40 mm

Size, mm(10...350)x(10...500), thickness to 40
Accuracy of preparation, mm
in diameter
in thickness


Blocks, twins, twin layers and cracks, inclusions that are visible in polarized lightNot allowed
Flatness≤ 2-3 λ at the length 25 mm (λ=633 nm)
Roughness of the polished surfaces (Ra), ÅFrom 2 to 100
Quality of the polished surfaces by MIL-0-13830AS/D - 80/50, 60/40, 40/20, 20/10
Transmission (%):
visible and IR spectral region (to 4,5 μm)
UV spectral region (0,2 μm)


Internal voltages, kg/mm2≤2
Crystallographic orientation

Our adress:

61001, Kharkov, 60 Lenin Ave.
phone:  +38(057)340-86-19,
fax:       +38(057)340-86-19,