NITTOH KOGAKU K.K.

Using advanced technologies to meet the needs for large diameter lenses

Nittoh’s lens polishing technologies can even handle large diameter lenses up to 600mm in diameter, while achieving high surface accuracy of λ/20. Nittoh technologies are some of the best in the world, so talk to us about your large-diameter, high precision lens requirements.

Germanium (Ge) and silicon (Si) ground lenses

Example Specifications
Outer diameter	ρE20mm	ρE5mm
Thickness	5mm	1.5mm
Material	Ge	Si
Shape	Aspherical	Plane-parallel
Applications
Lens for far-infrared camera, window for infrared sensor

Special material lenses
Metallic lenses made of germanium (Ge) or silicon (Si) are employed in the security industry in applications such as infrared lenses.
Quartz is a material with exceptional light transmission properties through the whole spectrum from ultraviolet through infrared, so it is used in a wide range of applications including the lenses and lamps for exposure equipment, lenses for lasers, and medical-use lenses.
Nittoh has the systems to manufacture lenses from germanium, silicon, quartz and other monocrystalline materials.

Lenses with holes and cemented lenses

Special lenses

ND filter lenses