Glass Fiber

Fiber Product

SUMITA provides optical fibers manufactured by our unique optical glass technologies as end products.

SUMITA's optical fibers are multicomponent optical fibers manufactured from optical glass as their raw materials.

We offer various types of fibers, which are not provided by competitors, by utilizing our manufacturing technologies for optical glass. Glass optical fiber has excellent transmissivity and is used in various fields such as industry, medicine, and general lighting.


Image processing
By combining a line light guide and light source equipment, it is possible to respond to various wavelengths and shapes for uniform lighting.

By using an image guide prepared by bundling several thousands or several tens of thousands of glass optical fibers, it is possible to obtain high-quality images.

There can roughly divided into two types; those that detect transmitted light and those that detect reflected light. Since both types require projecting fiber and receiving fiber respectively, we offer both types according to applications.

General lighting
Lighting by glass optical fibers offers gentle light that produces less temperature increases and can prevent aging of the display such as color fading and damage.

They can also be used in various fields. Please feel free to contact us.

Light Guide
When a number of optical fibbers are bundled for transmitting light, it is called a light guide.
Type: Straight light guide Multi-branched light guide Ring light guide Surface emitting light guide Quartz light guide

Light Source
We offer various light sources such as a metal halide lamp and halogen lamp according to required wavelength specification from the ultraviolet range to near-infrared range.

Condenser Lens
A condenser lens can shed bright and uniform light on a subject.
We offer various shapes to allow our customer can select one according to the light guide.

Rod Lens
A rod lens illuminates a square area uniformly.
It is best suitable for lighting for display or substrate check.

End Fusion Light Guide
This light guide is manufactured by thermal fusion binding of fibers without using adhesive.

  • Improved heat resistance due to nonuse of adhesive
  • Increased total engagement light intensity with the same OF (Optical Fiber) diameter due to increased core occupied area
  • Increase of emission light intensity by up to 25% due to increased engagement light intensity
  • Decrease of illuminance due to W.D. (Working distance) is less than that of adhesively-bonded light guide

Transmission Light
A transmission light is a lateral luminescent line lighting using a quartz rod.
It is best suitable for inspection lighting using a CCD or line sensor.

  • Since nearly parallel irradiation light with high directionality can be obtained, uniform lighting with less unevenness of light intensity is possible.
  • Free design of an irradiation width between 2 and 10 mm (standard value: 5 mm) and an effective luminescent length between 100 and 2,700 mm is possible.
  • There is no limitation of subject because heat irradiation from the irradiation surface is low.
  • Since the transmission light and light source part are separated, maintenance works such as replacement of lamp are easy.

We offer various special order products other than the standard products.

List of fiber types


Fiber type

Numerical aperture (NA)

Aperture angle (2θ)






Projection on a wide area is possible even if the W.D. is short. It is best suitable for applications such as a light guide when lighting a wide area.




The aperture angle is larger than the standard value and projection on a relatively wide area is possible. It is best suitable for lighting for a wide area.




Since this fiber has a standard aperture angle and excellent transmissivity of visible light, it is a typical optical fiber which can be used for optical transmission over a relatively long distance.




The aperture angle is small and it is possible to add directionality to light. It is best suitable for lighting of a narrow area or optical sensors.




The feature of this fiber is its N.A is smaller than that of a quartz fiber. It is best suitable for optical sensors etc. for which directionality is important.





This is a multicomponent optical fiber series with low transmission loss and is best suitable for a light guide for optical communications and long-distance transmission.
* See the page for SON for details.





This is a multicomponent optical fiber series with low transmission loss and is best suitable for optical communications due to its broadband performance.
* * See the page for SON for details.







This is an optical fiber for near-infrared whose transmission property around 1,100 - 1,350 nm is better than that of SOG-70S.

Creating the big picture.together.

SUMITA Optical Glass - seit über einem halben Jahrhundert
setzen wir Maßstäbe in den Bereichen Optisches Glas,
Faseroptik und Funktionsglas.
Mit Ihnen, unseren Partnern und Kunden.