Asahi has developed photonics tools for over 50 years, and now provides state-of-the-art optical filters and instruments to overseas customers.
We are passionate about contributing to the development of optical industries and progress of sciences with our cutting-edge technology. Stop by our website, find the best solutions, and let's discuss what you require for your science and business with Asahi!

Optical Filters

Asahi Spectra offers various types of optical filters as standard. Our optical filters are manufactured by hard coating, such as ion assisted deposition (IAD) and magnetron sputtering (MS). These coating methods achieve hard coating, excellent durability for environment (humidity, low or high temperature, thermal shock or vacuum) and stability of spectral performance.

Optical Instruments

Asahi Spectra offers various types of light sources such as xenon light sources, solar simulators, a halogen light source, and a LED light source. We offer not only light sources but also a monochromator and a transmittance meter. Depending on your application, we will provide the best solution.


UV Filters

Astronomical Filters

Spectra Viewer


Solar Simulator

Monochromatic Light

Holiday Information

We will be closed for winter holidays from December 29th 2021 to January 5th 2022.
Please note that we are not able to respond to your inquiry and order during this period. We appreciate your kindly understanding.


Spectra Viewer

May 20, 2021

Easy to compare several filter properties with specific settings

High-power Xenon Light Source with Double 400W Lamps

December 24, 2020

Approximately 400% higher output in VIS range compared to MAX-350

Graph View of Optical Filters

December 9, 2020

Easy to check filter properties thanks to new functions