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    Micropatterned Filters

    Our micropatterned optical filters combine patented microlithography expertise with state-of-the-art coating technology to enable smaller and simpler optical designs for portable or complex optical systems. This exclusive technology allows patterning multiple dielectric, metal, and color filter arrays on a single substrate.

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    Bayer-Custom-Mosaic-Filter-2048x1366

    Standard & Custom Micropatterning

    Standardized processes have been developed and are used today to manufacture these filter arrays in a new, world-class optical semiconductor waferfab designed explicitly for this purpose. The process is scalable to wafer-level glass or semiconductor volume production and supports millions of custom micropatterned optical devices delivered annually.

    Torrent Photonics' patterned coatings are used to enhance performance in many biomedical, industrial, and aerospace OEM applications – enabling next-generation integrated optical devices that are more compact, robust, and cost-effective.

    The equipment in our Class 100/1000 wafer fabrication cleanrooms have been selected and custom-designed for micropatterned coatings, enabling us to support ultra-small (μm) pixel-level features for imaging applications. We use the latest coating technology, including IAD evaporation, magnetron sputtering, and ion beam sputtering techniques.

    Semiconductor-style mask aligners handle wafers up to 8 inches in the lithography fab.

    Design & Materials

    • Custom Wavelength Bands | UV, VIS, NIR, SWIR
    • Dichroic | Bandpass, Short-Wave Pass, Long-Wave Pass, BBAR and More
    • Metallic | High Reflector, Dark Absorber, Apertures, Neutral Density and More
    • Sensors

    Optical Technology

    • Multispectral Sensing for Spectroscopy
    • Multispectral Imaging with Custom CCD and CMOS Sensors
    • Precision Reticles and Alignment Patterns
    • Patterned Pixels and Apertures
    • Focal Plane Arrays (FPA)
    • Variable/Gradient Filters


      Patents cover our patterned optical filters in micro-patterning technologies (US patent 7648808) and pixel filter array on substrate (either on glass or directly on sensor/detector wafers) methodologies (US patent 6638668).

    Applications

    • Non-Invasive Biomedical Imaging
    • Remote Sensing for Satellites, Defense, and Precision Agriculture
    • Industrial Quality Control Sensing and Imaging
    • Color Mixing for Entertainment Lighting
    • Light Intensity Control in Industrial Equipment
    • Sensing for Consumer Wearables
    • Integrated Custom Optics for Scientific Devices

    Designed For Your Success

    Our operations focus on supporting customers in developing their next-generation imaging and sensing equipment. With a toolbox of processes and technologies, we can quickly design the most effective way to develop products based on your application or product functionality. Our application engineers work with you to quickly assess your requirements and provide a proposal of technical feasibility.

    Discuss Your Custom Design
    Designed For Your Success

    Design Parameters and Decisions Factors

    Substrate

    Semiconductor wafers, optical-grade glass, fused silica, or other materials

    Number of Bands

    Number of filter bands combined on one substrate (multispectral sensing)

    Filter Design Parameters

    Transmission bands and blocking specifications

    Feature Geometries

    Smallest size and tolerance in position

    Alignment

    Alignment accuracies and available alignment markers

    Handling, Testing, Packaging

    Defined (e.g., ESD) handling, dicing, finishing, testing, and packaging

    Filter Types

    Bayer-Custom-Mosaic-Filter-2048x1366

    Custom Bayer & mosaic filters created with standard RGB gels, dichroic coatings, or a combination.

    Simultaneous acquisition of all wavelengths allows for point-and-shoot and real-time data.

    Reduces SWaP, allowing for applications with minimal space (UAV)

    Active-Wafer-Deposition (1)High volume for semiconductor and cell phone industries


    Processing of customer-supplied material (up to 8 inches)


    Improved S/N on ambient light, proximity & biometric sensors

     

    Bayer-Custom-Mosaic-Filter-2048x1366

    High-performance Pattern Dicrohic filter.


    Space-qualified filters used for multispectral imaging


    Narrow line widths and minimal unusable space between filters


    Options from VIS to SWIR ranges


    Allow customers to have multiple bandpass filters on one substrate for one camera, eliminating the need for multiple cameras in one system.


    Custom patterned filters with up to 9 bands on one substrate. We can pattern on glass or semiconductor wafers.

     

    Linear-Variable-Filter-Black-scaledVaries in blocking reflection in a predictable and linear pattern across an optic.

    Used for Sensing and Hyperspectral Imaging

    Gives hundreds of distinct filters on one substrate.

     

    Pattern-Stripe-Filters-scaledSpace-qualified filters used for multispectral imaging

    Narrow line widths & minimal unusable space between filters

    Options from VIS to SWIR ranges

    Custom patterned filters with up to 9 bands on one substrate. We can pattern on glass or semiconductor wafers.

     

    Multiple high-performance dichroic coatings bonded together side by side.

    Used for large features sized sensing (+1mm)

    Allows customers to work with one filter rather than multiple substrates.
    Gradient-Pattern-Filter-scaledFine quasi-stochastic pattern

    Smooth fades & mixing

    Dimming

     

    Connect with our experts to start your project.

    We specialize in laser optic applications used in high-power and ultrafast lasers.