Raw Material

About 250 types of high value glass for lens use. 100~200 times more expensive than ordinary glass. The lens is pressed to shape that closely matches the shape of the finishied product.


Grinding / Curve Generating

The surface of the blank lens is ground to generate the required radius that is very close to the design redius and reduce thickness up to 0.01 mm of the design thickness using diamond grinding wheel.


★Pellet Polishing

Lens undergoes this intermediate process after grinding and curve generating to further reduce thickness and improve surface.

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★Pad Polishing

Lens from previous lapping process undergoes final polishing to make the lens transparent. Depending on the pad polishing tool and polishing slurry used, the accuracy of the lens curvature is further improve to about 0.0003 to 0.001 mm. This process requires high level of technological and operational expertise.

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★Pitch Polishing

A number of lenses are attached to a base made of pitch and then polished using polishing slurry, a mixture of water and polishing powder, at low rpm to futher improve radius of lens and reduce the thickness to about 0.01 of the design value. Surface quality is very high because of the low speed used in the process.

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Accuracy of curvature is checked by observing the light interference bands called Newton Rings produced by a lens when placed in contact with a standard Newton plate or test glass. Scratch and other polishing defects are visually inspected against strong light.Scratch width is limited to 0.003〜0.006o.

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The lens is machined for final diameter and accurate alignment of its optical axis mechanical axis. This process is important for good image production.

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To protect lens, reduce its reflectivity and improve its transmissibility, a very thin coating, about 14μ, is applied through vacuum deposition of magnesium fluoride. Further protection is obtained through multiple coating.



Depending on lens application, lenses of different materials are paired and bonded. In pairing, it is very necessary that the optical axes of both lenses be properly aligned.

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Finished lenses are assembled inside a frame or housing and alignment of the optical axis of lens with the mechanical axis of the mounting is inspected prior to delivery.

Plastic Lens Molding

This process uses high precision mold, fully automated injection machine, high quality material dryer, and a clean room environment in order to produce high quality plastic lenses. The process employs one hundred percent quality control that is done through visual inspection and checking. Use of an interferometer ensures high precision and constant level of product quality. Materials used arecommonly PMMA and PS resins but are not necessarily restricted to these.

★Plastic Molding

Modern Injection Molding Machines are used to produce high precision molded plastic products. These products are manufactured using short cycle times in a fully air conditioned production room. Commonly used materials are GPPS, PP, PC, SAN and ABS. Other materials may be used as required by design.

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