Fineshut KIWAMI

Hemispherical reflectance of 1% or less in the visible to near infrared region (250 to 2000 nm)

Fineshut SP is a light-absorbing anti-reflective sheet developed by Koyo Kogyo Co., Ltd., our predecessor. Ultra-thin foam polyurethane sheet, which combines excellent optical properties with an amazing thickness of 0.22 mm ~.

Surface of Fineshut KIWAMI

Fineshut KIWAMI is a special grade that improves the surface shape of the Fineshut SP and further improves the anti-reflective performance. It is formed of asperities like light shielding grooves and absorbs light emitted from the direction perpendicular to the grooves.


Especially in the near infrared region, it has the best anti-reflection performance among our handling materials, and achieved a total hemispherical reflectance of 1% or less in a wide wavelength range of 250 to 2000 nm. This amazing performance is achieved with a thinness of only 0.37 mm.

The base material is fine urethane foam similar to Fineshut SP, so it retains its features such as durability and ease of handling. There are no hair loss problems specific to flocking and large reflections in the near infrared range, and even with a slight contact like plating and deposition coating, gloss is generated and performance does not deteriorate significantly.


We also comply with RoHS 2.0 regulations.

Live shot comparison with other anti-reflective material

(From the top left) Fineshut SP, Fineshut KIWAMI. (Lower left) PET film with anti-reflection coating, Black PET film with matte processing by sand-blasting. The shutter speed of the camera and exposure setting are changed before shooting.

And it is a comparison image taken with a normal camera and a near infrared camera.

Samples are from the left, general anti-reflective coat, flocked sheet for optical equipment, Fineshut KIWAMI. You can check the stable anti-reflection performance of Fineshut KIWAMI.


  • Suppress stray light for optical device
  • Absorption of scattered light by laser processing machines
  • Non-reflective table for 3D scanning
  • Work bench mat for assembly and visual inspection
  • LiDAR target
  • Still life photograph's background

It is also recommended for prevent stray light of the mount adapter.

prevent stray light of mount adapter

Also available as cut parts

When we receive orders for Fineshut KIWAMI as cut parts, we propose an estimate that minimizes material costs by selecting the size with the highest material yield. Please feel free to contact us via email or contact form.


 In addition, black double-sided tape made of PET substrate is laminated as a standard specification, but we can change it to the double-sided tape you desire.

Product Specifications


 Total 0.42mm ± 0.05 mm

 (Fineshut KIWAMI 0.37 mm + Thinner Adhesive tape 0.05 mm)


Standard sheet size

 53mm x  190mm

 280mm x 480mm

Caution on use

 In order to maximize the light absorption effect by the groove shape on the surface, please use the direction of the groove perpendicular to the light source.

There is light transmission due to microfoaming and grooves, so it can not be used for shading applications.

Download Catalogue

EN Fineshut Catalogue190809.pdf
Adobe Acrobat Document 446.8 KB

Purchase from here

This product is available for every optical design company who is troubled with stray light removal and anti-reflection measures, and every general user who work on DIY light.  In just one click from Amazon, kindly go to Amazon sales page from the link below.


If you can consider purchasing multiple sheets for company use, we may be able to offer cheaper proposals through direct sales, so please kindly contact us.

Amazon USA

Amazon UK

Amazon DE

Amazon JAPAN