
The future lies beyond the light.
Inspiring discovery, together with researchers.
From the design and production to the complete support of spectroscopic measurement systems,
we push the boundaries of optical technology
hand in hand with researchers.
PRODUCTS
Spectroscope
Bunkou Keiki’s monochromators feature an asymmetrical modified Czerny-Turner mount. This design minimizes stray light while delivering both high resolution and high throughput. With interchangeable diffraction gratings, it covers a wide wavelength range from 200 nm to 25 µm.
SR Measurement
This spectrograph is fully optimized for multichannel detectors, including CCD, CMOS, and InGaAs sensors. By minimizing optical aberrations to the absolute limit, it delivers exceptional spatial resolution and highly accurate measurement performance across the entire focal plane.
Irradiation
Users can select the optimum light source tailored to their target wavelength and measurement conditions. Our versatile lineup of light sources enables the flexible construction of customized spectroscopy systems.
Optical
We offer a diverse lineup of detectors covering the UV to near-infrared (NIR) spectrum. Featuring high sensitivity and low noise, these detectors enable the flexible construction of spectroscopy systems tailored to your specific measurement wavelengths and applications.
Electrical
We offer a diverse lineup of peripheral devices designed for wavelength control, light intensity adjustment, and filter switching. These accessories enable the flexible construction of spectroscopy systems and create an efficient measurement environment tailored to your applications.
Solar cell
By precisely controlling monochromatic light at constant energy and constant photon flux, this system measures the spectral response and quantum efficiency of solar cells and photodiodes. Our proprietary light intensity monitor control ensures exceptional stability and reproducibility.
OUR STRENGTH
With nearly 50 years of proven reliability and expertise, we have walked alongside researchers at the forefront of optical measurement.
By freely combining light sources, monochromators, detectors, and software, we build tailor-made spectroscopy systems dedicated to solving your specific measurement challenges.


50 Years of Proven Trust and Excellence
Half a Century of Reliability and Innovation
50 Years of Development and Achievement at Bunkoukeiki


Tailor-Made Solutions
50 Years of Development and Achievement at Bunkoukeiki


The Group Synergy & Expertise
50 Years of Development and Achievement at Bunkoukeiki
Contact
Inquiry by Phone
+81-42-646-4123
+81-90-4452-7824
Business Hours: Weekdays 8:30 AM – 5:00 PM









