Interferometer, Optical Systems & Optical Components

We have worked closely with academic professionals and research institutes over the years to develop complicated products that no other companies could offer. Examples of these projects are optical observation under high magnetic fields, manufacturing space telescopes and measurement using interferometry over long distances.

Through the years of engaging with these complex products, we obtained knowledge and experience as an optical company.

As we strive to become the brightest small star in this field, we appreciate your continued support and look forward to working with you in the future.

Beam Expander for Fizeau Laser Interferometer 

You can expand your measurement area from 4” to 12”. Easy setup with your Standard Fizeau Interferometer.


  • Easy upgrade your Interferometer
  • Expand maximum flat measurement area
  • Expand maximum spherical measurement area
  • Compact, light-weight design, attachable with PZT
  • BE-150 4” to 6” / BE-200 4” to 8” / BE-300 4” to 12”
  • Transmission Flat and Transmission Sphere are options

Transmission Sphere for 6” Interferometer

  • We manufacture Transmission Sphere for laser interferometers
    in 6-inch size.
  • Kiyohara Optics manufactures Transmission Sphere with unique f-numbers that are not supplied by other manufacturers.
  • For 6-inch Transmission Sphere, f0.8, f1.1, f2.2, f3.5, f5.4 and f7.2 are currently available in the market, where we can offer f1.5, f1.9, f2.6 and f3.0 as well.
  • Customized f-number Transmission Sphere are attainable here at Kiyohara Optics to meet your requirements.