XBlacken™ Nano Optical Black is a nano-scale bismuth sulfide (Bi₂S₃)–based optical black material designed for stray-light suppression and contrast control in precision optical systems. It is used where unwanted reflections and optical flare must be minimized, such as camera module interiors, optical baffles, and sensor enclosures.
Non-carbon black chemistry reducing conductivity-related risks
Available as powder or tailored dispersion (on request)
Engineering-oriented documentation and evaluation support
Performance Parameters (Typical)
Typical characteristics shown below are provided for engineering reference only. Final performance depends on formulation, binder system, film thickness, and processing conditions.
Parameter
Unit
Typical / Target
Notes
Material base
-
Bismuth sulfide (Bi₂S₃)
Material entity definition
Particle scale
-
Nano-scale design
Optical-grade distribution
Supply form
-
Powder / dispersion
Customized on request
Optical function
-
Stray-light suppression
Binder and thickness dependent
When to Use
Optical systems requiring suppression of internal reflections
Imaging modules where contrast and ghosting are critical
Sensitive opto-electronic assemblies where carbon black causes side effects
When NOT to Use
Decorative or bulk coloration applications
Cost-driven industrial black pigment use
Systems without validated optical performance requirements
Failure Mode Awareness
Over-dispersion may reduce functional optical performance
Incompatible binder systems may increase haze or gloss
Excessive film thickness may compromise low-reflectance behavior
FAQ
Is this a ready-to-use coating?
No. It is a functional optical black material intended to be used within a validated coating or binder system.
Can it be supplied as a dispersion?
Yes. Dispersion form can be customized based on solvent, resin, and stability requirements.
Is it suitable for general black coloration?
No. It is designed specifically for optical light control, not decorative pigmentation.
What tests are recommended?
Spectral reflectance (visible range), gloss (20°/60°), and L*a*b* measurements using an integrating sphere.
Source & Validation Notes
Engineering rationale based on optical stray-light control principles
Performance values depend on system-level formulation and validation
Application area
Optical stray-light suppression coatings
Camera module interiors and optical housings
Optical baffles and lens barrels
Imaging and sensing enclosures
LiDAR and sensor module internal light-control surfaces
Precision optical instruments