Optical Window

Elliptical Windows

Specification	Grade
Material	BK7
Diameter Size	10mm To Maximum
Thickness Tolerance	± 0.01mm
Angle Of Incidence	45`
Effective Focal Length	+2%
Clear Aperture	>90%
Flatness	Lambda/2(General), Lambda/8 (High Precision)

Flat Window

Specification	Grade
Material	BK7
Diameter Size	10mm To Maximum
Thickness Tolerance	± 0.01mm
Angle Of Incidence	45`
Effective Focal Length	+2%
Clear Aperture	>90%
Flatness	Lambda/2(General), Lambda/8 (High Precision)

Optical Windows are optical glass with polished faces that are relatively parallel. They are used to protect laser output. Always windows are AR coated to eliminate reflection, so AR coated windows offer improved transmission when used in industrial displays or computer monitors. Their high transmission makes them ideal for most industrial and laser protecting applications.

Filter: Circular Window
Diameter: 12.5mm To 50mm
Material: Fused Silica/BK7 Sapphire

Filter: Rectangular Window
Diameter: 12.5mm/12.5mm To 50mm/50mm
Material: Fused Silica/BK7 Sapphire

Standard Precision Grade

Material	Surface Flatness @632.8 nm	Parallelism	Bevel/Chamfer	Coating Options
Fused Silica / BK7 Sapphire	Lambda /4	<=2 arc min	0.3 x 45°	AR Coating MgF2 (400-700nm) Single Layer Coating

Size	Dimension Tolerance
12.5 mm +0.0 / – 0.2mm	2mm +/-0.1mm
25 mm +0.0 / – 0.2mm	2mm +/-0.1mm
37.5 mm +0.0 / – 0.2mm	4mm +/-0.1mm
50 mm +0.0 / – 0.2mm	6mm +/-0.1mm

Commercial Grade

Material	Surface Flatness @632.8 nm	Parallelism	Bevel/Chamfer	Coating Options
Fused Silica / BK7 Sapphire	Lambda /4	<=2 arc min	0.3 x 45°	AR Coating MgF2 (400-700nm) Single Layer Coating

Size	Dimension Tolerance
12.5 mm +0.0 / – 0.2mm	2mm +/-0.1mm
25 mm +0.0 / – 0.2mm	2mm +/-0.1mm
37.5 mm +0.0 / – 0.2mm	4mm +/-0.1mm
50 mm +0.0 / – 0.2mm	6mm +/-0.1mm

Protective windows for Disc-
Used as last optics to be used before the working are to protect the high-class laser optic from material spillings during the laser welding and cutting process.

Laser Protective Window

“Antireflective coating Enhances Optical Windows Performance!” Each beam of light generates a back reflection during the transition from one into another medium. Antireflective coatings are used to minimize effects like loss of power and the appearance of dangerous hot spots caused by the back reflection. Antireflective coatings (short AR-coating) are used in a variety of optics as they reduce the reflection of glass surfaces. The increased light transmission and a reduction of aberrations are the main advantages. Product features

Single layer – AR (advantageous for materials with high refractive index)
Narrow-band AR coatings (eg for V-type single laser wavelength).
Broadband AR coatings
Multispectral AR coatings

Typical applications

Antireflective sight glass window to protect high-quality laser optics from splashing material
Antireflective laser scanner window

Coating range

All AR-Coatings can be offered with a wavelength range between 200-3000nm.

Standard specification for Laser Protection Windows

Standard substrate: Fused Silica (for lasers with higher output power)
Standard tolerances: Ø±0.1mm or +0/-2mm
Thickness: ±0.1mm or +0/-0.2mm
Edges grinded with Chamfer ( 0.3mmx45°)
Both sides mechanically polished λ/4-λ/6
Scratch/dig 60/40
Standard Coating: @1064nm T≥99.5%, @633nm T≥99.5% or broad band coating: i. e.@900-1080nm T≥99.5%
Sample CURVES for a coated fused silica substrate for 1064nm

We are also able to offer you laser discs without anti-reflective coating!

Please feel free to contact us, if your needed laser disc is not stated in the list and let us have your specification. (diameter, coating and so on), so that we can arrange an individual offer for you.

Wedged Window

Optica offers a line of Wedged Laser Protecting Windows with AR coatings on both sides. These wedged optics eliminate fringe patterns and can be used to help avoid cavity feedback. Windows are useful for protecting a laser output from environmental effects and for beam sampling applications. We also supply planar windows with a variety of substrate materials and coating options.

Specification	Grade
Material	BK7
Diameter Size	10mm To Maximum
Thickness Tolerance	± 0.01mm
Angle Of Incidence	45`
Effective Focal Length	+2%
Dimension	+/-0.2 (General), +0/-0.05 (High Precision)
Flatness	Lambda/2(General), Lambda/8 (High Precision)

We provide materials made out of BK7, Fused Silica, BaF2, KBr, Silicon, Germanium and ZnSe according customer’s specifications. Standard wedge angles are 30′, 12′, 1°, 2°, 5° and 7.5° but we can make any angle. Please contact us for quotation of your custom optical wedge price!

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