About Us

Our History and Policy

Asahi Spectra Co., Ltd. (ASC) was founded in 1970 in Tokyo, Japan by 3 engineers. ASC has been developing a vacuum deposition technology such as ion assisted deposition (IAD) and ion beam sputtering (IBS) , which achieve hard coating, excellent durability for environment (humidity, low or high temperature, thermal shock or vacuum) and stability of spectral performance. By now our optical filters have contributed in various markets such as astronomy, semiconductor, biotechnology, education and so on.

Nowadays, customer requirements are becoming more complicated as optical innovation advances, and most requirements can not be satisfied by just optical filter technology. So we have been trying to expand our field to optical instruments based on our 50 years accumulated optical know-how as you can see how professional our optical instruments are.

Our integrated manufacturing process by both filter and instrument specialists is the most competitive advantage against "other only-optical-filter makers".

Asahi Spectra USA Inc. was established in January, 2005 in California where is the west center of optical market in USA, in order to distribute Asahi Spectra brand in USA and all over the world.

Major Business Connections


  • The Boeing Company
  • NASA Goddard Space Flight Center
  • Jet Propulsion Laboratory
  • Cerro Tololo Inter-American Observatory
  • W. M. Keck Observatory
  • California Institute of Technology
  • Stanford University
  • Johnson & Johnson, Inc
  • Fermi National Accelerator Laboratory
  • Lawrence Berkeley National Laboratory
  • Smithsonian Astrophysical Observatory
  • Massachusetts Institute of Technology
  • Harvard University
  • Yale University


  • ASML Netherlands B.V. (Netherlands)
  • European Southern Observatory (Germany)
  • Institut de Fisica d'Altes Energies (Spain)
  • Max-Planck-Institute for Astrophysics (Germany)
  • Instituto de Astrofisica de Canarias (Spain)
  • University of Cambridge (U.K.)

Other Regions

  • Instituto de Astronomia, Geofisica e Ciencias Atmosfericas (Brazil)
  • King Abdullah University of Science and Technology (Saudi Arabia)
  • University of Science and Technology of China (China)
  • Samsung Electro-Mechanics Co., Ltd. (Korea)
  • Anglo-Australian Observatory (Australia)
  • South African Astronomical Observatory (South Africa)
  • Tata Institute of Fundamental Research (India)
  • Taiwan Semiconductor Manufacturing Company Limited (Taiwan)
  • Korea Astronomy and Space Science Institute (Korea)