NITTOH KOGAKU K.K.

Aspherical glass lenses are manufactured by heating and softening glass preform lens blanks, and then pressing (molding) them at high pressure in Nittoh’s unique molds, before cooling down the lenses. This technology has made it possible to mass produce large diameter aspherical glass lenses, which was previously difficult to achieve by machining and polishing the glass lenses.

Nittoh uses its unique PGM (Precision Glass Molding) technology to manufacture a range of aspherical glass lenses in different shapes and sizes. This enables low-cost production of aspherical lenses while utilizing the optical characteristics, environmental characteristics and superior physical characteristics of glass lenses. Try out Nittoh’s high precision glass molding technologies.

Machining range	５mm〜４５mm in diameter (other shapes)
Applications	Lens for projector, lens for DSC, etc.
Machining molds for glass molding	Mold machining and correction/adjustments are carried out in-house, which enables fast, high precision results. (Time-to-delivery: 1.5 to 2.0 months)
Aspherical surface accuracy

Key Equipment

High precision glass molding machine
Mold release coating machine
High precision aspherical surface 3-D profilometer
Aspherical surface eccentricity measurement instrument
Profilometer/roughness measuring instrument
Laser interferometer
Refractive index measurement instrument
Reflecting microscope