PRODUCTION of light absorbing coatings

Light absorbing
(super black) coatings

«Institute of Navigation JSC» has developed light-absorbing coating Н-Ф 30.ч.

The coating is designed for applying on metal construction elements of optical-electronic devices to suppress the scattered radiation in optical path.

The coating is a conductive wrap of firm NiP solution (the content of phosphorus is 5-7%), which was grown galvanically, and ensures ultralow values of the coefficient of the diffuse reflection in optical path.

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Unique product

Light absorbing (super black) coatings

«Institute of Navigation JSC»
has developed light-absorbing (super black) coating (LAC) N-F 30.c (MKFR.443900.001 ТУ)

Function

The coating is designed for applying on metal construction elements of optical-electronic devices to suppress the scattered radiation in optical path.

How does it work

beam out

beam in

Ultralow values of the coefficient of the diffuse reflection are obtained by the multiple reflection of emission in the advanced morphology of the surface coating.

Main characteristics of the coating

wave length, nm

Area of the coating
in a single process .................... no more than 2 000 cm²

Working spectral
range ................................. 0,42 - 2,5 µm

Width of the coating ............................ 40 - 60 µm

Coefficient of reflection:

Δλ = 0,42 - 0,9 µm ...... no more than 0,5%

Δλ = 1,0 - 2,5 µm .......... no more than 1%

Angular dependence of reflection characteristics of BSD (bidirectional scattering distribution function)

BSDF, 1/stere

Angle of dispersion (°)

Angle of descent of beam on the surface of the sample: ___10° ___30° ___50° ___70°

Competitive advantage:

Working range 250-2500 nm;
Coefficient of the diffuse reflection: not more than 1%;
Maximum coating area is up to 2000 cm sq. on the following materials: dural, titanium, invar;
The coating is electrically conductive;
The absorption principle ensures high stability of characteristics during long-lasting lifespan;
The ability to enhance working spectral range up to far IR range.

Some options of application:

Lens hood of star sensor

Lens hood of telescope

Focal plane of the optical-electronic converter