WINDOWS
Windows are used in optical systems to separate the environment of one part of the system from another. For CO -lasers Tydex offers windows produced from
- Germanium,
- Zinc Selenide:
AR coated windows
Uncoated windows
Combined coated windows
Brewster windows
- Gallium Arsenide.
Germanium Windows
Specifications:
1.
Material:
optical grade monocrystalline Ge
2.
Clear aperture:
> 90% of a size
3.
Diameter (width & length) tolerances, mm:
+0.0 / -0.1
4.
Thickness tolerance, mm:
+/- 0.1
5.
Parallelism, arc. min.:
<= 5
6.
Surface quality, scr/dig:
for parts to 3 in.:
40/20
for parts to 8 in.:
60/40
for larger parts:
80/50
7.
Surface figure (power-irregularity) @ 633 nm, fringe:
1 - 1/2
8.
Coating (residual reflectivity is specified per surface):
AR/AR @ 10.6 µm, %:
< 0.5
BBAR/BBAR @ 9-11 µm, %:
2.0
9.
Damage threshold:
CW mode, kW/cm2:
1
c Selenide: AR coated windows Uncoated windows Combined coated windows Brewster windows Gallium Arsenide.
ZnSe AR Coated Windows
Specifications:
1.
Material:
CVD-ZnSe
2.
Diameter tolerance, mm:
+0.0 / -0.1
3.
Thickness tolerance, mm:
+/- 0.25
4.
Parallelism, arc min:
<= 3
5.
Clear aperture:
90% of diameter
6.
Surface quality, scr/dig:
40/20
7.
Surface figure (power-irregularity) @ 633 nm, fringe:
1 - 1/2
8.
AR coating reflectivity per surface @ 10.6 µm, %:
< 0.5
Maximal available dimensions: diameter - 101.6 mm. BBAR coatings are also available for NIR-MIR (for example for CO2 laser).
Standard sizes:
Diameter
Thickness
inches
mm
inches
mm
0.250
6.35
0.080
2.0
0.375
9.52
0.080
2.0
0.50
12.7
0.080
2.0
0.75
19.1
0.080
2.0
1.00
25.4
0.080
2.0
1.00
25.4
0.120
3.0
1.10
27.9
0.120
3.0
1.50
38.1
0.120
3.0
2.00
50.8
0.200
5.1
2.50
63.5
0.250
6.4
3.00
76.2
0.250
6.4
ZnSe Uncoated Windows
Specifications:
1.
Material:
CVD-ZnSe
2.
Diameter tolerance, mm:
+0.0 / -0.1
3.
Thickness tolerance, mm:
+/- 0.25
4.
Parallelism, arc min:
<= 3
5.
Clear aperture:
90% of diameter
6.
Surface quality, scr/dig:
40/20
7.
Surface figure (power-irregularity) @ 633 nm, fringe:
1 - 1/2
Standard sizes:
Diameter
Thickness
inches
mm
inches
mm
0.250
6.35
0.080
2.0
0.375
9.52
0.080
2.0
0.50
12.7
0.080
2.0
0.75
19.1
0.080
2.0
1.00
25.4
0.080
2.0
1.00
25.4
0.120
3.0
1.10
27.9
0.120
3.0
1.50
38.1
0.120
3.0
2.00
50.8
0.200
5.1
2.50
63.5
0.250
6.4
3.00
76.2
0.250
6.4
ZnSe combined coated windows
For different applications and in particular for dental industry we produce ZnSe combiners which allow to achieve high transmission at working ("drilling") wavelength and reflect "pilot" beam to have enough illumination of an object under prosthetics procedure.
Custom-made sizes and specification are available.
Specifications:
1.
Material:
CVD-ZnSe, grade G1
2.
Clear aperture:
> 90% of diameter
3.
Diameter tolerances, mm:
+0.0 / -0.1
4.
Thickness tolerance, mm:
+/- 0.1
5.
Parallelism, arc. min.:
<= 5
6.
Surface quality, scr/dig:
40/20
7.
Surface figure (power-irregularity)@ 633 nm, fringe:
1 - 1/2
8.
Coating:
combined, to meet the following parameters:
transmission @ 10.6 µm,
(AOI = 45 deg.), %:>= 95.0
eflectance from one surface
@ 532 nm, (AOI = 45 deg.), %:>= 80.0
Brewster Windows
Specifications:
1.
Material:
CVD-ZnSe
2.
Width tolerance, mm:
+0.0 / -0.1
3.
Length tolerance, mm:
+0.0 / -0.1
4.
Thickness tolerance, mm:
+/- 0.25
5.
Parallelism, arc min:
<= 3
6.
Clear aperture:
90% of length and width
7.
Surface quality, scr/dig:
40/20
8.
Surface figure (power-irregularity) @ 633nm, fringe:
1 - 1/2
9.
Brewster angle @ 10.6 µm, arc grad:
67.4
Maximal available dimensions: diameter - 101.6 mm.
Standard sizes:
Width
Length
Thickness
inches
mm
inches
mm
inches
mm
0.40
10.2
1.04
26.4
0.080
2.0
0.50
12.7
1.30
33.0
0.080
2.0
0.60
15.2
1.56
39.6
0.080
2.0
0.70
17.8
1.82
46.2
0.080
2.0
0.80
20.3
2.08
52.8
0.120
3.0
0.90
22.9
2.34
59.4
0.120
3.0
1.00
25.4
2.60
66.0
0.120
3.0
1.50
38.1
3.91
99.3
0.160
4.0