SCIENTIFIC MANUFACTURE ENTERPRISE
 
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Announcement
   
FUTURE REQUIREMENTS FOR PRECISION OPTICAL COATINGS IMPLEMENTED IN THE DEVELOPMENTS OF OUR ENTERPRISE


- Spectral characteristics of coatings

- Increasing complexity of the spectral characteristics: Superwide working range of the spectrum (λe-λb> 5λb) and working angles (Δα>0,3), deep modulation of characteristics (R1> 99,995%; R2 <0,01%);

- High stability of the spectral characteristics against the coating options modifying (warm-up drift of the layers thickness, coverage "aging");

Optical losses

- Acceptable level of optical losses (absorption, scattering) in the laser mirrors is less than 50 ppm (<0.005%);

number of layers in a coating

- The number of layers in a coating may vary from one to several hundred. (Optical interference filter for the modern astronomical telescope contains 200 layers approximately);

gradient of coating layers thickness on the substrate surface

- For a number of coatings a layer thickness heterogeneity should be significantly less than 1% while the dimensions of optical workpieces vary in the range from part of a millimeter up to several meters;

- For a number of coatings it is necessary to change a thickness of the coating on the substrate surface area according to specified law (to be able control the spatial characteristics of radiation)

-Characteristics of optical coatings with a given (optimal) polarized and phase anisotropy are provided with necessary gradient of the layers thickness on the coating surface

Resistance to radiation exposure

- Acceptable stability level of interference mirror and active laser rod antireflection coating against laser irradiation exceeds 1 GW/cm2 (for Nd:YAG lasers);

Resistance to environmental factors

(Temperature, thermal gradient, humidity, chemical agents)

- Zero resistance group (field conditions)

Resistance to external mechanical influences

- Zero resistance group (missile launch, etc.)