PRODUCTS & SERVICES

PRODUCTS & SERVICES

Optical windows

2020-06-24

Delfa manufactures huge numbers of optical windows every year, which material includes general optical glass, fused silica, CaF2, MgF2, Silicon, Ge, ZnSe, color glass, etc.

Delfa has the ability to meet your requirements of different sizes, accuracy, materials, shapes and coatings from visible to infrared range you need.

Specifications:

Diameter or length

0.6mm—800mm

Diameter tolerance

Up to +0/-0.01mm

Thickness

As thin as 50μm

Thickness tolerance

Up to +0/-0.01mm

Surface figure

Up to λ/20 @632.8nm

Parallelism

Up to 0.5 arc seconds

Surface quality

Up to 10-5 Scratch & Digs

Bevel

<0.2mmx45°

Coating

According to your request

 ** Other sizes and special shapes are avaliable upon your request.

Delfa can serve the windows with different material as follows:

Material

Refractive Indices

Properties

Thermal Expansion
Coefficient

Densityg/cm3

K9

1.5164@0.588μm

Transmission Range:    330-2100nm

7.5x10-6/K

2.52

Fused Silica

1.4858@0.308μm

Transmission Range:    185-2500nm

0.58 x10-6/K

2.20

CaF2

1.399@ 5.0μm

Transmission Range:    140-9400nm

18.85 x10-6/K

3.18

Silicon

3.426@5.0μm

Transmission Range:   1200-7000nm

2.55 x10-6/K

2.33

Germanium

4.0034@10.6μm

Transmission Range:   2000-14000nm

5.8x10-6/K

5.33

ZnSe

2.4028@10.6μm

Transmission Range:    550-20000nm

7.1 x10-6/K

5.27

Sapphire

1.755@1.0μm

Transmission Range:    180-4500nm

8.4 x10-6/K

3.98


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