Coating and Filter Technology

Lenses having large curvature on convex surface, which are used for wide angle lenses, tend to receive unnecessary light coming into the angle of view due to wide angle lens design.

Anti-reflection coating preventing unnecessary light is applied on lens surface at the vacuum deposition process. However, coating thickness at the peripheral areas generally tends to be thinner. Therefore, vacuum deposition technology, which enables to apply uniform coating to whole area, is needed.

Tamron has developed new vacuum deposition technology and created anti-reflection coating for convex surfaces (AX Coating) which has uniform coating thickness and contributes to achieve a sufficient coating performance.

The needs of cameras with wide angle lenses are expanding for surveillance, automotive, and panorama camera applications. By utilizing AX Coating, suitable performance for each application is sufficiently exerted.

*AX Coating: Anti-reflection eXpand Coating

A notch filter is an optical filter that rejects the transmission of wavelength within a specific range and has a high transmittance outside of that range. Performance is evaluated based on blocking and transmittance rates.

Tamron’s notch filter achieves OD 6 blocking within a specific wavelength range from visible to NIR. Notch filters are widely used in various fields, such as raman spectroscopy, fluorescence observation device in bioscience field and fluorescence imaging device in medical.

Tamron can propose a comprehensive optical system utilizing the feature of notch filter.

Anti-reflection coating with a wide band and a high transmittance is demanded for lenses which are used for surveillance, measurement and inspection applications required for imaging with accuracy and precision.

Tamron’s eBAND Coating, compared to the conventional multiple-layer coatings, has greatly enhanced anti-reflection performance and has achieved a higher transmittance performance in the wide range from visible to SWIR.

Utilizing Tamron’s eBAND Coating improves measurement accuracy of measuring equipment and inspection apparatus.

Furthermore, the eBAND Coating makes it possible to reduce the effects of ghosting and flare generated by disturbance of light. The eBAND Coating is adaptable in various materials and shapes such as prism, lens array and small diameter lens and therefore expands the possibility of applications.

Lenses used in optical devices often touched by people or installed in devices facing adverse conditions need to be cleaned by wiping with solvent. If needed to be repeatedly cleaned coatings applied to the lens, such as an anti-reflection coating, will wear-off. Fluorine coating is the solution so that dust, moisture, oil (sebum) on the lens surface can be easily removed.

Tamron’s fluorine coating is a high water repellent and antifouling, at the same time achieving anti-reflection. Tamron delivers a lens with wiping durability enhancement contributing to save of labor for maintenance, which can be used in a wide variety of usages.