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Stray Light Suppression in Lens Housings

By David Alster A typical lens consists of several refractive elements housed together in a housing.The housing has several functions:Protection of the refractive elementsMaintenance of the correct spacing between the elementsMaintenance of centering between the elementsWhere required – generation of thermal correctionMechanical features for interface with a systemThese functions are performed using spacers and internal steps…
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metallic tube coated with ultra black coating from the inside

Emmisivity in Passive Thermal Management

By David AlsterAll devices generate waste heat as a by-product of their operation. This heat needs to be dissipated in order to avoid the generation of undesirable high temperatures and damage to the devices.The waste heat can be dissipated from a device by one of several mechanismsConduction to a housing or any other larger heat-sinkConduction to…
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Acktar Lambertian Black™ ( Left) vs Powder Black ( Right )

Everything You Need To Know About Black Wrinkle Powder Coatings

Wrinkle powder coatings appear textured and crackled. They come in single color tones, and many include additional metallic for elevated color and shine. Wrinkle powder coatings provide both decorative and functional purposes as they are chemical resistant and have superb mechanical properties. Wrinkle Powder Coating application There are four key factors to wrinkle powder coating applications…
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Acktar Black Metal Velvet for perfect particle free flocking

Anti reflection Film – The Best Solution to Glare on Reflective Surface

What is an Anti-Reflection Film? Anti-reflection film is a type of optical coating that minimizes reflection when placed on surfaces of optical materials such as lenses. This anti-reflection coating often appears as a transparent thin film with contrasting refractive index layers. The Purpose of Anti-reflection Film Reducing the overall reflection properties of an optical material has…
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Acktar Fractal Black coating Wide band IR absorber-Target

Where Can We Meet Infrared Waves Every Day?

Infrared waves are electromagnetic radiations invisible to our naked eyes, and their frequency band lies between 740 nm and 400000 nm. Since our eyes can not detect its frequency, we are often unaware of the infrared rays that we encounter on a day-to-day basis! Although these waves are invisible to our eyes, they have been a…
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BRDF + TIS Database Of Acktar’s Light Absorbing Coatings

SUPRESS STRAY LIGHT, ABSORB LASER POWER, CREATE HIGH EMMISSIVITY Alexander Telle CEO ACM Coatings GmbH – subsidiary of Acktar Ltd. WHY & WHEN to think about scattered light WHY Enhancing signal-to-noiseIncreasing sensitivityImproving image quality & contrastReducing complexity WHEN As early as possible in the development process of new photonic instruments and systemsBut it is never to…
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black clothes

A Detailed Exploration into The Blackest Black

About Light and Color Visible light is a category of electromagnetic waves that we are capable of seeing. When light hits an object, some of it is absorbed, and some of it is reflected. The color of the object is the portion of the light that is reflected from it. A “black” object is an object…
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Holding black ball

An In Depth Guide To Understanding Black Bodies

What Is The Meaning of a Black Body?  A black body, also written as blackbody, is a theoretical construct describing an object that absorbs all electromagnetic radiation falling onto it, leaving all wavelengths of light to be absorbed as well. In turn, no light is reflected. Without reflected light, the object will appear black, hence the…
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Different between Black Anodizing and black acktar

Everything You Need To Know About Black Anodizing

What is Anodizing?  Before we can begin to answer the question “what is black anodizing?” we must understand what anodizing itself is.  Anodizing is the electrochemical process in which a metal surface is coated with a water-resistant oxide layer. Anodizing can be performed on a range of metals, such as magnesium and titanium, but is best…
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Stray light – what is it, and what kinds of stray light exist?

What is stray light? Stray light is light which enters a system from outside the field of view and therefore is reflected from internal part surfaces of the system and eventually reaches the detector impacting signal to noise or image quality as the case may be. This is prevented by a combination of mechanical design and…
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