Coating and Filter Technology

To fully derive a lens performance in accordance to various purposes, an optimal coating needs to be applied in addition to optical lens design technology.
By applying a coating on the lens surface various effects and functions can be achieved such as optical performance enhancement and surface protection.
Tamron conducts lens and coating development for various applications, for instance, surface protection for photographic lens, durability enhancement for automotive camera, and surveillance camera.
Moreover, Tamron is holding a uniform coating technology for wide curved surfaces on wide-angle or fish-eye lenses. Recently, to achieve a coating technology suitable new fields, Tamron is developing a filter/coating technology capable of precisely transmitting a specific wavelength for medical or fluorescence imaging with laser.

Anti-reflection coating for convex surfaces (AX Coating)*

A coating technology that makes uniform vacuum deposition thickness at the peripheral areas and central areas

A coating technology that makes uniform vacuum deposition thickness at the peripheral areas and central areas

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

Technical features

  • FEATURE 1

    Coating technology that makes uniform thickness at the peripheral areas even on a convex surface

  • FEATURE 2

    Used in combination with Fluorine Coating, great effect is provided on the usage in an adverse environment such as outdoor and the usage for optical device needs cleaning

  • Hue change due to coating thickness difference

    (under lighting of fluorescent lamp)

    ※Click on the image to enlarge

  • Average reflectance at the center and peripheral

    (Wavelength 400nm~700nm)

    ※Click on the image to enlarge

Examples of applications

  • Camera using fish-eye lens

    Camera using fish-eye lens

    Automotive sensing cameras

  • Camera using fish-eye lens

    Camera using fish-eye lens

    Panorama cameras, Surveillance cameras

  • Microscope

    Microscope

    Equipment and evaluation devices using large curvature lens

※The photo is for illustrative purposes only.

Hue change due to coating thickness difference
中心と周辺の平均反射率

Thin film optical filter (Notch Filter)

High optical density (shielding performance)

Thin film optical filter (Notch Filter)

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.

Technical features

  • FEATURE 1

    Capable of a high blocking level within a specific wavelength from visible to NIR.

  • FEATURE 2

    OD6 blocking performance.

  • FEATURE 3

    Propose a comprehensive optical system utilizing the feature of notch filter.

Technology intro video

Technology intro video

Examples of applications

  • Raman spectroscopy

    Device for analysis of lithium ion battery, electronic component, food and medicine, etc.

    ※Click on the image to enlarge

  • Fluorescence observation device

    Device for observing cell and protein in bioscience field

    ※Click on the image to enlarge

  • Fluorescence imaging device

    Fluorescence imaging device

    Camera supporting fluorescence guided surgery

※The photo is for illustrative purposes only.

eBAND Coating

Wide band anti-reflection coating (from visible light to SWIR light range)

eBAND Coating
  • eBAND Coating (Extended Bandwidth & Angular-Dependency Coating)
  • VIS (Visible)
  • NIR (Near infrared)
  • SWIR (Short wavelength infrared)

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.

Technical features

  • FEATURE 1

    High transmittance performance in the range from 400 to 1700 nm

  • FEATURE 2

    Anti-reflection coating to reduce ghosting and flare generated from an intense incident light

  • FEATURE 3

    Various materials and shapes available such as prism, lens array and small diameter lens

Technology intro video

Technology intro video

Examples of applications

  • Vein imaging

    Vein imaging

    Authenticating camera by transmitting NIR for imaging finger veins and palm veins patterns

  • Inspection (Spectroscope)

    Inspection (Spectroscope)

    SWIR camera for food analysis, moisture measurement, and component analysis, etc.

  • Inspection (Contamination inspection)

    Inspection (Contamination inspection)

    Inspection camera for foreign matter and food freshness in assembly line and food factory, etc.

  • Outdoor camera

    Outdoor camera

    Monitoring camera for surveillance, river condition and vehicle number recognition, etc.

  • Remote sensing

    Remote sensing

    Spectrum camera installed in satellite and drone

※The photo is for illustrative purposes only.

Fluorine Coating

Wiping durability enhancement

Wiping durability enhancement

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.

Technical features

  • FEATURE 1

    Maintain optical performance with low reflection while keeping high water repellency and antifouling

  • FEATURE 2

    Durability enhancement for a wide variety of usage

  • FEATURE 3

    Enhance the robustness against adverse condition by combining fluorine coating and lens waterproof mechanism

Technology intro video

Technology intro video

Examples of applications

  • Monitoring an unattended work environment outside (Adverse condition scene: dust, dirt, oil, water or moisture)

    Monitoring an unattended work environment outside (Adverse condition scene: dust, dirt, oil, water or moisture)

  • Imaging device with various robots as a substitute for human eyes

    Imaging device with various robots as a substitute for human eyes

  • Optical device used by the public needs cleaning

    Optical device used by the public needs cleaning

※The photo is for illustrative purposes only.

Feel free to contact us

We look forward to putting Tamron technologies to work within your business.

CONTACT Document request