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Substrates

News

Coating Guide extended
The menu section Coating guide on top
became an extension. Our Coating specials
give you a brief overview of the specialities
LASEROPTIK is able to serve:
optimized coating designs and techniques,
substrate handling and coating fixtures.

Optimized thin film coatings
with IBS
This article (in german) by Dr. Wolfgang Ebert and Tobias Groß (published in "Laser+Photonik", Iss. 1, March 2010, p. 30-34) discusses and compares the different coating methods found at LASEROPTIK with focus on IBS process and its special possibilities.

Photonics West 2010
booth 4601-24
January 26.-28.
San Francisco, USA

LASEROPTIK started an "open door" day on September 3.,2009. A lot of visitors came in to congratulate, celebrate and inform themselves about the capabilities of our production. A photo gallery of LO OPEN can be seen here or at menu item "About us > 25th anniversary".
A short article (in german) describes the day and the celebrations at the "Laserhof" in Garbsen.
download PDF file

1984 - 2009
LASEROPTIK GmbH celebrates the
25 anniversary!

MgF₂ / CaF₂

LASEROPTIK stocks a selection of UV- and VUV- substrates for fast delivery.
Our experience in the production of high power laser optics has shown, that only the best materials and polishing techniques result in color center free substrates with highest UV transmission.
The optical quality of the UV substrates is controlled by the following measures:
• the surface flatness by Fizeau-Interferometer,
• the transmission in the range 120-250nm by a VUV-spectrophotometer and
• degradation by irradiation of a sample with 5 Joule at 193nm.

MgF₂
is the most resistant fluoride material to degradation by atmospheric moisture, also at higher temperatures. Its hardness, ruggedness and resistance to mechanical and thermal shock is useful for laser windows. MgF₂ has a low birefringence, and the windows are fabricated with the optic axis a symmetry axis, minimizing the birefringence effect (c-cut). MgF₂ substrates, supplied by LASEROPTIK, are very resistant to F-center formation due to its low O₂-contamination, which is also evidenced by the high VUV transmission.

Diameter Ø mm	Thickness t mm	Flatness λ (633nm)	Surface imp. tol.	VUV-MgF₂Article-No.	3
12.7	3	λ /10	5/3 x 0.063	MF-S-01648	180
25	6.35	λ /10	5/3 x 0.063	MF-S-00046	260
38	6.35	λ /10	5/3 x 0.063	MF-S-01649	490
50	9.5	λ /10	5/3 x 0.10	MF-S-01650	940

CaF₂
has a very broad transmission range from VUV to FIR and is used as window and substrate material. Compared to MgF it has an isotropic structure, lower hardness and is sensitive to thermal shocks.
If the condensation of water vapor is prevented, CaF₂ windows can be used for several years in the laboratory.
CaF₂ begins to soften at 600 °C, the reaction with atmospheric moisture will take place above this temperature.

Tolerances
Length/Width : Thickness t : Parallelism/Wedge : Chamfer : Clear aperture : Flatness round Substr. : Flatness rectang. Substr. : Surface imperfect. tol. :	+0.0/-0.1mm ±0.1mm < 5 min. of arc 0.1- 0.3mm x 45° (for t > 0.5mm) > 80% 3/0.5 (λ/4) 3/1 (λ/2) acc. to DIN ISO 10110-7

Length a mm	Width b mm	Thickn. t mm	Surface imp. tol.	CaF₂ 157 nm Article-No.	€	CaF₂ 193 nm Article-No.	€	CaF₂ 248 nm Article-No.	€	CaF₂ VIS / IR Article-No.	€
50	27	2	5/3x0.040	CF-S-00728	480	CF-S-00195	400	CF-S-01636	300	CF-S-00333	210
60	35	2	5/3x0.040	CF-S-00562	690	CF-S-00194	490	CF-S-01637	440	CF-S-00334	360

Diameter Ø mm		Thickn t mm	Surface imp. tol.	CaF₂ 157 nm Article-No.	€	CaF₂ 193 nm Article-No.	€	CaF₂ 248 nm Article-No.	€	CaF₂ VIS / IR Article-No.	€
12.7		3	5/3x0.063	CF-S-01638	100	CF-S-00653	95	CF-S-01639	90	CF-S-01640	85
25		6.35	5/3x0.063	CF-S-00374	360	CF-S-00748	340	CF-S-01641	300	CF-S-00169	280
38		6.35	5/3x0.063	CF-S-01642	470	CF-S-01643	380	CF-S-01644	360	CF-S-00753	300
50		9.5	5/3x0.10	CF-S-01645	980	CF-S-01221	800	CF-S-01646	750	CF-S-01647	630

MgF2 / CaF2

MgF₂ / CaF₂