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Stable, ultra-low reflectance from visible light to 1500nm NIR
A standard light-absorbing blackout sheet suffers from a critical vulnerability: the moment it enters the near-infrared (NIR) region beyond 750nm, its reflectance spikes sharply to over 10.0%, creating unwanted infrared reflection.
In stark contrast, the FINESHUT series (SP, KIWAMI, and KIWAMI XX) maintains an exceptionally stable, ultra-low reflectance across a broad spectrum spanning from visible light up to the 1500nm near-infrared range.
Thanks to these flat, outstanding spectral characteristics, FINESHUT reliably suppresses stray light in cutting-edge optical systems and autonomous-driving technologies that rely on NIR light, such as LiDAR, various infrared sensors, and night-vision cameras. As a broadband NIR-absorbing material, FINESHUT eliminates the performance cliff that limits conventional blackout sheets beyond 750nm.
This lets you select the product grade tailored to your specific optical design and performance requirements. All reflectance values are total hemispherical reflectance measured at 8° angle of incidence (AOI) per JIS Z 8722, using an integrating sphere spectrophotometer across a 250–1500nm wavelength range.
Even under intense light, reflections are suppressed to significantly improve QR code contrast and readability. Custom high-visibility panels like this are available through our Custom Panel Fabrication Service.
Ultra-low reflection, light-absorbing foam sheet
With its exceptional optical properties, FINESHUT serves as a premier anti-reflection material integrated inside a wide range of precision equipment. Engineered from an ultra-fine microcellular polyurethane foam sheet, a next-generation blackout material, it uniquely combines world-class optical performance with an incredibly thin profile.
Unlike traditional stray-light mitigation materials, its standout feature is minimal particle shedding and effortless handling. FINESHUT is fully compliant with strict global environmental regulations, including RoHS 2.0. For advanced applications requiring even higher light-absorption capabilities, we also offer premium high-end models: the KIWAMI grade and our top-tier KIWAMI XX grade.
FINESHUT is a breakthrough material that masterfully balances extraordinary light absorption with the minimal particle shedding required in cleanroom environments. The secret lies in our proprietary micro-porous surface structure, formed within the polyurethane foam, it effectively traps incoming light in repeated internal reflections within the micro-porous cavities until it is fully dissipated.
By significantly minimizing both specular and diffuse reflections, flaws inherent in standard anti-reflection paints and sheets, FINESHUT delivers a "True Black" that ensures the stable, peak performance of high-precision optical systems, seamlessly integrating into precision instrument interiors and cleanrooms where conventional flocked materials simply cannot be used.
FINESHUT product lineup
The FINESHUT series offers three distinct grades tailored to your specific performance requirements and application scenarios. Use the comparison below to find the right model for your project.
Reference prices are calculated per square meter (m²) and are subject to change without prior notice.
FINESHUT SP
Best for: researchers seeking a reliable baseline test, and R&D engineers looking to optimize contrast in cameras, inspection systems, and automated vision equipment.
FINESHUT SP is our standard-grade light-absorbing foam sheet, meticulously engineered to balance peak performance with everyday usability. Boasting a remarkable average total reflectance of just 1.2% across the visible-light spectrum, it delivers dependable, stable light absorption across a versatile range of wavelengths.
Constructed from microcellular polyurethane foam sheets (0.22mm and 0.40mm thicknesses) with an incredibly uniform cell structure, it combines lightweight properties, superb machinability, and long-term durability, with full compliance to RoHS 2.0.
Tape options: 3M 93015LE (0.15mm) / DIC #8616UJ Black (0.05mm) / No tape
1000mm-wide orders: please allow up to 2 months for manufacturing
Available exclusively for FINESHUT SP0.4: light-blocking PET film (Mat Lumirror 188, 188μm) laminated to the back of the sheet, in 245×200mm size.
Best for rolling into the interior of lens barrels, or for use as a standalone non-reflective blackout panel.
FINESHUT KIWAMI
Best for: engineers needing to eliminate background noise in high-sensitivity sensors, and professional creators demanding uncompromising contrast in high-end imaging gear.
FINESHUT KIWAMI is a premium, high-spec model that builds upon our standard SP grade to deliver exceptional light-absorption performance. Its extraordinary capabilities are proven by a stunning total reflectance of a mere 0.7%.
This drop in reflectance delivers outstanding contrast and crystal-clear visualization in highly demanding professional environments and sensitive optical systems where rigorous stray-light management is mandatory, the ultimate grade for those who refuse to compromise.
Pre-laminated with 3M 93015LE (0.15mm), KIWAMI ships with tape as standard, since the base material is too thin to handle safely otherwise.
FINESHUT KIWAMI XX
Best for: researchers creating next-generation LiDAR systems or space telescopes that require absolute black, and specialists isolating faint signals in spectrometers or laser measurement arrays.
FINESHUT KIWAMI XX is our elite flagship model, boasting the highest light-absorption performance in the entire series. Featuring a 0.71mm profile (with tape, as shipped), it effectively controls stray light even in the most demanding optical environments while maintaining an astonishingly low total reflectance of just 0.5%.
This is the definitive, one-of-a-kind choice for pushing the boundaries of darkness and achieving the ultimate optical environment.
Pre-laminated with DIC #810TB, an industrial adhesive tape. Base-material thickness (before lamination) is not separately published.
Full specifications by grade
DOWNLOAD DATA SHEET →Source: Fineshut Technical Data Sheet, Musou Black | Koyo Orient Japan Co., Ltd., 2026.07
This document is for reference only and does not constitute a guaranteed value, Musou Black TDS, 2026.07
Double-sided tape
In addition to the tapes listed here, we can also laminate other types of tape upon request.
- Fineshut lead time: Standard width is 500mm. For 1000mm (1m) width orders of Fineshut SP, please allow up to 2 months for manufacturing.
- Handling foams: Please handle the foam gently and avoid excessive pressure or rough contact.
- Lamination note: Fineshut KIWAMI and Fineshut KIWAMI XX are always pre-laminated with tape, because the material is too thin to handle safely otherwise.
Engineered for Earth. Trusted for Space.
For over 30 years, FINESHUT has been at the forefront of stray-light mitigation in optical instruments. Today, that expertise extends into space research. FINESHUT KIWAMI is used inside a ground-based telescope at JAXA's Sagamihara Campus, where it plays a role in ongoing development work connected to the JASMINE Project, targeting a 2032 launch. Its near-zero reflectance across near-infrared wavelengths and minimal particle shedding were key factors in its selection for this application.
READ THE "JASMINE PROJECT" BLOG FEATURE →Struggling with complex geometries?
FROM SINGLE PROTOTYPES TO HIGH-VOLUME PRODUCTION
That's where Musou Black's Official Precision Die-Cutting & Fabrication Service comes in.
All you need to do is provide your CAD or design data. Our specialized team leverages extensive engineering expertise to deliver precise, tailor-made shapes for optimal optical performance. For in-house prototyping, combinations of FINESHUT with our ultra-thin double-sided adhesive can also be easily cut using a commercially available heat cutter.
REQUEST A QUOTE & TECHNICAL CONSULTATIONSubmit your design files via our contact form for a smooth engineering assessment.
Stray-light control for optics, LiDAR & research
- Lens barrel inner walls and optical housings
- Stray-light mitigation components inside LCD and semiconductor inspection equipment
- LiDAR calibration targets and internal sub-assemblies
- Anti-reflection material for cameras, microscopes, and endoscopic imaging systems
- Calibration boards for industrial cameras
Reflections suppressed for reliable QR scanning.
- Wall lining for suppressing stray reflections in darkrooms
- Scattered-light absorption inside laser processing machinery
- Inner lining for fluid measurement (PIV) setups using sheet lasers
- Calibration enclosures for spectroradiometers
Bordering AR markers with FINESHUT improves recognition accuracy.
- Noise masking and background suppression during 3D scanning of reflective objects
- Premium, light-absorbing background material for commercial still photography
- High-contrast workbench mats for assembly and inspection lines requiring dust and particle visibility
FINESHUT (left) vs. standard black paper (right).
FAQ
What is the difference between flocking material and polyurethane foam anti-reflection sheets?+
Flocking materials use fiber-based surfaces to scatter light but shed particles continuously, unsuitable for cleanrooms or precision optical assemblies. Polyurethane foam sheets such as FINESHUT achieve ultra-low reflectance through a micro-porous cell structure that traps and absorbs light internally, with minimal particle shedding, making them safe for cameras, microscopes, semiconductor equipment, and other sensitive environments.
How low can total reflectance go for commercially available anti-reflection materials?+
Most commercial black paints and blackout sheets achieve 3–10% total reflectance in the visible range, degrading significantly beyond 750nm NIR. FINESHUT achieves total reflectance as low as 0.5% (KIWAMI XX), maintaining stable ultra-low reflectance across a broad spectrum from visible light up to 1500nm NIR, without the performance cliff seen in conventional materials.
What anti-reflection material is safe for cleanroom and semiconductor manufacturing use?+
FINESHUT is engineered for environments where particle contamination is critical. Unlike flocked sheets, its microcellular polyurethane foam structure generates minimal particle shedding. Adhesive-free versions are also available for applications requiring strict low-outgassing compliance, such as semiconductor manufacturing equipment and space instrument assemblies.
Which black material does JAXA use for space telescope applications?+
FINESHUT KIWAMI is used inside a ground-based telescope at JAXA's Sagamihara Campus, where its stable ultra-low reflectance across near-infrared wavelengths and minimal particle shedding support ongoing development work connected to the JASMINE Project.
What is the operating temperature range for FINESHUT?+
The maximum continuous operating temperature for the FINESHUT series is 80°C (176°F). If your application involves higher-temperature environments, please contact us in advance for technical consultation.
Can you provide custom sizes or complex die-cut geometries beyond the standard formats?+
Yes, absolutely. Through our Precision Cut & Fabrication Service, we offer high-precision laser cutting based on your CAD or design data (DXF, DWG, IGES, etc.), accommodating everything from single-unit prototyping to high-volume mass production.
Are there options available without adhesive backing?+
Yes, FINESHUT SP is available in an adhesive-free specification. For KIWAMI and KIWAMI XX, a high-performance, ultra-thin double-sided tape comes pre-laminated as standard. If your project specifically requires an adhesive-free version of these premium grades, please contact us to discuss custom options.
Is FINESHUT suitable for stray-light mitigation inside microscopes and cameras?+
Yes, it's well suited. FINESHUT was specifically engineered to eliminate stray light and unwanted reflections within optical enclosures and precision machinery. Because it features minimal particle shedding, it can be safely integrated into highly sensitive cleanroom environments.
What materials are used in FINESHUT products?+
The core material of the FINESHUT series is microcellular polyurethane foam. The backing is pre-laminated with a high-performance, ultra-thin adhesive tape.
Can FINESHUT be used in low-outgassing applications?+
Yes, it can. If you require adhesive-free sheets to meet strict low-outgassing or cleanroom standards for semiconductor manufacturing equipment, please contact us directly for customized fulfillment.
Do you provide product samples?+
We apologize, but product samples are not available. To evaluate our product's quality and performance, you can purchase "Standard Cut Sizes" in small quantities from our online store with no minimum order requirement.
What are the pricing and lead times for high-volume bulk orders?+
For high-volume production or large bulk orders, we provide tailored commercial tier pricing and customized production schedules. Please submit your project details via our contact form, and our team will prepare a formal proposal to meet your timeline.
Musou Black | Koyo Orient Japan Co., Ltd.
FINESHUT is developed and manufactured by Musou Black, a black-materials specialist brand founded in 2020 as an in-house venture of Koyo Orient Japan Co., Ltd., based in Ageo, Saitama, Japan.
Driven by a mission to solve light-reflection problems across industry and art, Musou Black combines world-class light-absorption technology with small-lot accessibility, serving customers in over 60 countries. FINESHUT products are marketed globally via Musou Black, and its materials have been adopted in applications ranging from high-end optical instruments to JAXA's JASMINE satellite telescope.
Let's spec your project.
From initial design evaluation to in-depth technical consultations and specification alignment, we offer comprehensive engineering support tailored to your project goals.
Whether you're wondering "will this work for our setup?" or "which grade fits our system?", our engineering team is ready to help.
REQUEST TECHNICAL CONSULTATION & QUOTEOpens our contact form, our engineers respond to every inquiry with a tailored assessment.