Dual Laser Line Reflecting Mirrors (DHR)
|Diameter tolerance||+0/-0.1 mm|
|Thickness tolerance||±0.1 mm|
|Surface quality||20-10 S-D|
|Surface flatness||<λ/8 @ 632.8 nm|
|Protective chamfers||<0.25 mm x 45°|
|Measured reflectivity||R>99.5 % @ A OI=0°
Rs>99.3 % and Rp>98.5 % @ A OI=45°
|Coating adhesion and durability||Per MIL-C-675A|
|Laser damage threshold reports||www.altechna.com/lidt|
These multilayer coatings are stacks intended to achieve the highest possible reflectivity at two specific laser line wavelengths at normal or 45 degrees incidence. Laser line high reflectivity coatings are intended for external beam manipulation applications where even slight losses may be intolerable.
Coatings are provided by Ion Beam Sputtering (IBS) or Electron beam evaporation with/without Ion assistance coating techniques.
|The coatings are designed to achieve the highest possible reflectivity at two specific laser line wavelengths at normal or 45 degrees incidence|
|Altechna metrology lab applies following product inspection:|
|Visual inspection – surface quality evaluation according to MIL 13830 and ISO 10110 standards|
|Dimensions – measurement of geometrical dimensions, as diameter, thickness, etc.|
|Transmittance (Spectrophotometer, laser)*|
|Reflectance (Spectrophotometer, laser)|
|Wavefront distortion (Interferometer)|
|Parallelism (Goniometer, interferometer)|
Altechna offers a wide range of high performance optical coatings on standard, custom or customer supplied optics.
Our coatings cover wavelength range from deep UV (193 nm) to far IR (25 µm) with biggest part of coatings done in wavelength ranges of most conventionally accessible laser and illumination sources from 266 nm to 2 µm.
We offer a set of standard and custom coatings per individual request:
- Anti-reflection coatings
- High reflection coatings
- Beam splitter coatings
- Partially reflective coatings
- Polarizer coatings
- Filter coatings
- Ultrafast GDD compensated coatings
- Gires-Tournois interferometer mirrors (GTI)
- Variable reflectivity mirrors
- Metallic coatings
At Altechna we aim to provide high damage threshold, high quality coatings for constantly growing photonics market with highest standards.
Each coating is special and over the years in the photonics field we have learned that flexibility is the key to meet high demands of our customers therefore our coatings are done using different technologies which are chosen for separate coatings individually. Here is our list of coating technologies available at Altechna:
- Electron beam evaporation
- Ion assisted deposition
- Ion beam sputtering
- Magnetron sputtering
Each technology is different and is used according to requirements of spectral sensitivity, damage threshold, hardness, surface quality etc.
|Deposition Rate||>10 Å/sec||~10 Å/sec||~3 Å/sec||1-6 Å/sec|
|Coating area per run||3000 cm2||3000 cm2||500 cm2||2000 cm2|
|Temperature Range During Coating||200 - 300°C||20 - 100°C||20 - 150°C||20-100°C|
|Number of Layers||1-50||~50||200||Up to 200|
|Density / Porosity||Porous||Dense||Near bulk||Near bulk|
|Adhesion / Durability||Low||Good||Excellent||Excellent|
|Humidity Sensitivity||Yes||Yes, small||No||No|
|Aging Effects||Yes||Yes, small||No||No|
|Intrinsic Stress||< 100MPa||~ 100MPa||Few 100MPa||Few 100 MPa|
Polymer film First Contact™ is a unique product designed for laser optics protection, preservation and cleaning. For all sorts of optical items it serves as a protection layer from damages during shipping, long term storage, environment changes, etc. and removes all dust and other contamination after the film is removed from the optical surface. It is absolutely safe for almost all types of optics and optical coatings.*
- Protects against scratching, abrasion, dirt, and water damage. Also protects against corrosion caused by water vapor, oxygen, and sulfur.
- Cleans the surface, removes particulates and organic contaminants.
- Leaves no residue.
- Leaves no hazardous waste.
- Safe to store for up to 4 years (period may be extended depending on storing conditions).
- Comes off in one piece.
- Does not lift metal from metal films.
- Safe with temperatures up to 200° C.
- Environmentally friendly
* Protective polymer cannot be used with optical components sensitive to acetate.
Price – 3 EUR per item (price includes coating service and polymer)
If you want to order protective coating please select "Optics Protection" in the catalog list.
Holding the sticker slowly peel the film starting from the edge. If necessary place the optic in its corresponding mount prior to removing the film.
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