Kogakugiken is a leading company for high precision optical components and optical crystal elements.

Kogakugiken always strives product innovation based on crystal processing. Our products have a good reception from customers in the world. Also we offer wide variety of optical components by different materials, experimental technologies.

VUV, DUV Wide Field Angle Waveplate VUV Achromatic Waveplate DUV Achromatic Waveplate MICRO THIN Waveplate

DUV Glan-Thompson Prism DUV Customized Polarizers for Laser QL Polarizer WoG Polarizer VUV Thin Crystal Polarizer

CLBO Crystal (We are only one company for processing the CLBO in the world.) Long-life THG1064nm LBO Crystal

Large Aperture Zero-order Waveplate Large Aperture Achromatic Waveplate Large Aperture Super-Achromatic Waveplate

Large Aperture Calcite Glan-Thompson Prism Large Aperture DUV Glan-Thompson Prism Large Aperture Rochon and Wollaston Prism Large Aperture Savart Plate and Nomarski Prism etc.

Large Aperture CLBO crystal and LBO crystal