english sitejapanese site
contact

Sankyo Optical Industry Corp.

processing flow

Optical Lens Manufacturing Flow

Bundles of light can be controlled
only if each manufacturing process
is perfectly executed.

Optical lens production requires plenty of experience and extremely high precision in all manufacturing processes, from material procurement to processing, assembly and inspection.

All our employees work as one to maintain and improve our product quality, holding pride in the company's technology.

STEP01 Materials

  • Purchasing materials from the right manufacturers.
  • Purchasing from the material maker.

STEP02 Rough Grinding


  • Creating a spherical shape.
  • Creating a spherical shape.

STEP03 Grinding


  • Adjusting the lens thickness and surface roughness. It becomes more transparent than before manufacturing and after rough grinding.
  • Adjusting the lens thickness and surface roughness. It becomes more transparent than before manufacturing and after rough grinding.

STEP04 Polishing


  • The spherical shape and surface roughness are adjusted until the required accuracy.
  • he spherical shape and surface roughness are adjusted until the required accuracy.

STEP05 Centering


  • In many cases, multiple lenses of different shapes and materials are stacked when utilized. At this moment, if the center (optical axis) at which the light passes through is misaligned, it will malfunction. When multiple lenses are put together, the physical periphery of the lenses are oriented with the optical axis, making sure the centers of the lenses are aligned.
  • In many cases, multiple lenses of different shapes and materials are stacked when utilized. At this moment, if the center (optical axis) at which the light passes through is misaligned, it will malfunction. When multiple lenses are put together, the physical periphery of the lenses are oriented with the optical axis, making sure the centers of the lenses are aligned.

STEP06 Coating


  • Glass without an anti-reflective coating, like the glass windows of a house, reflects a great deal of light which limits its usage.
    Reflection can be lessened and more light can pass through by coating the surface of the lens with a thin layer.
  • Glass without an anti-reflective coating, like the glass windows of a house, reflects a great deal of light which limits its usage.
    Reflection can be lessened and more light can pass through by coating the surface of the lens with a thin layer.

STEP07 Assembling

  • The bending of light depends on the combination of the light color (wavelength) and the lens material. This causes a color blurriness in the subject.
    To prevent color blurriness, 2 or more lenses of different properties that cancel each other's color blurriness are attached together.
  • The bending of light depends on the combination of the light color (wavelength) and the lens material. This causes a color blurriness in the subject.
    To prevent color blurriness, 2 or more lenses of different properties that cancel each other's color blurriness are attached together.

Please feel free to consult us!

Click here for consultations and inquiries

acccess