ALKOR Technologies - your CRYSTAL optics supplier.   ALKOR Technologies - your CRYSTAL optics supplier.
ALKOR Technologies - your CRYSTAL optics supplier.
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Optical windows. IR, UV windows. High Precision Optical Windows. Drilled windows.

Alkor Technologies - manufacturer of custom UV and IR optical windows made of different optical materials: CaF2, BaF2, Germanium, Silicon, KBr, ZnSe, Fused Silica, BK7 and more. Custom size round, square, rectangular and drilled optical windows are available upon request. Optical Windows are flat, plane-parallel plates that are often used as protective barriers for electronic sensors or detectors from outside environments. Optical Windows should be selected based on the material transmission or mechanical properties of the substrate.

In addition, we offer a variety of infrared and ultraviolet coatings on optical windows. Please refer to coating page for more information.

Contact our Sales Team for pricing for any custom size and coatings requirements.

Visit our optical windows catalog:


Optical windows thickness calculator: click here.

High Precision optical windows:

We can provide up to 150mm diameter CaF2, BaF2, Silicon, Germanium, Fused Silica high precision windows with S/D 20/10; Flatness 1/10λ @ 633 and parallelism up to 10 arc. sec.

Alkor provide an extensive range of optical window types:

Round windows
Round parallel windows
rectangle windows
Rectangle parallel windows
square windows
Square parallel windows
wedged windows
Round wedge windows

Drilled windows for spectroscopy

Drilled optical windows

Commonly used standard windows for FTIR (IR-spectroscopy) instruments.

Standard materials: CaF2, BaF2, KBr, NaCl, KCl, Fused Silica
Discs Rectangles
Diameter x Thickness Length x Width x Thickness
6 x 1 mm 25 x 12 x 2 mm
13 x 1 mm 25 x 25 x 4 mm
13 x 2 mm 29.5 x 14.5 x 2 mm
15 x 2 mm 29.5 x 14.5 x 2 mm drilled
19 x 2 mm 29.5 x 14.5 x 4 mm
20 x 2 mm 29.5 x 14.5 x 4 mm drilled
22 x 2 mm 38.5 x 19.5 x 2 mm
22 x 4 mm 38.5 x 19.5 x 2 mm drilled
25 x 2 mm 38.5 x 19.5 x 4 mm
25 x 4 mm 38.5 x 19.5 x 4 mm drilled
25 x 5 mm 41 x 23 x 3 mm
32 x 3 mm 41 x 23 x 3 mm drilled
32 x 3 mm drilled 41 x 23 x 6 mm
38 x 3 mm 41 x 23 x 6 mm drilled
38 x 6 mm 45 x 20 x 6 mm
41 x 3 mm 45 x 20 x 6 mm drilled
49 x 6 mm 50 x 25 x 6 mm
50 x 3 mm 50 x 25 x 6 mm drilled
Minimal order for drilled optics - 10pcs

á Size tolerance,mm Parallelism Flatness Surface quality
Standard +0, -0.1 3 arc. min 1 wave at 0.63Ám 60/40
Achievable +0, -0.02 10 arc. sec wave/10 at 0.63 Ám 10/5

Our production line of optical windows include: viewing window, viewports, UV and IR transmitting window, drilled spectroscopic windows, circular demountable cell windows (FTIR consumables), high pressure windows for vacuum and submarine applications, IR camera windows, sensor covers, coating substrates, sight glasses, cryostat windows, flame sight windows, windows for sight flow indicators, lens protection windows.

See also: optical lenses, Optical Prisms; FAQ