Variable reflectivity mirrors

Material	UVFS, BK7
Types	Plano/Plano, PCV, PCX
Diameter Tolerance	+0.0, -0.15 mm
Thickness Tolerance	+/-0.1 mm
Flatness	λ/10
Surface quality	20-10 scratch & dig
Paralellism error (PL/PL)	<10 arcsec
Clear Aperture	>90%
Coating damage threshold	>10 J/cm2 @ 1064 nm for 10 ns pulses

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Description Features Metrology

In order to have better beam quality, i.e. in non-stable resonators, variable reflection mirrors can be used. High intensity of the laser beam requires use of components with a high damage threshold. Dielectric coatings are best suited to meet these requirements. Altechna offers variable reflectivity mirrors with dielectric coatings, designed for wavelengths in the range from 266 to 2500 nm.

	Improves beam shape and quality
	Variable/locally defined reflection
	Highest available central reflection value R_r(max) = 50%
	Custom design (substrate shape, wedge, AR coating) available

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.

Reflectance (Spectrophotometer, laser)*

Flatness (Interferometer)

Parallelism (Goniometer, interferometer)

*(…) used equipment

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Material
Dimensions, mm
Thickness, mm
Type	PCX PCV Flat/Flat Meniscus
Radius of Curvature, mm
Center wavelength, nm
Wedge
Ro, %
Wm, mm
Gaussian order, k
Quantity