Custom Optical Filter Services

We provide custom optical filter design and manufacturing services for research laboratories, universities, OEM systems, and industrial customers. Our team supports prototype development through low- and medium-volume production with customized optical coating solutions across UV, visible, NIR, and IR wavelength ranges.

We offer a wide range of custom optical filters and thin-film coating technologies designed for demanding optical performance requirements, including high transmission efficiency, wavelength selectivity, laser damage resistance, and environmental stability.

Our Custom Optical Filter Capabilities

Filter Types

• Bandpass Filters
• Long Pass Filters
• Short Pass Filters
• Notch Filters
• Dichroic Filters
• Neutral Density (ND) Filters
• Beam Splitters
• Edge Filters
• Laser Line Filters
• Fluorescence Filters
• IR Blocking / UV Blocking Filters

Supported Wavelength Ranges

• UV: 200–400 nm
• Visible: 400–700 nm
• Near Infrared (NIR): 700–2500 nm
• Mid-IR coatings available upon request

Optical Performance

• Transmission up to >98%
• Reflection up to >99.5% for HR coatings
• Bandwidth customization from narrowband to broadband
• Optical density (OD): OD3–OD6+ available
• Surface quality down to 10-5 scratch-dig
• Flatness up to λ/10
• Low wavefront distortion coatings available

Substrate Materials

• Fused Silica
• BK7
• Sapphire
• Quartz
• Silicon
• Germanium
• ZnSe
• CaF₂
• Custom optical substrates upon request

Size & Geometry

• Diameters from 3 mm to >300 mm
• Square, rectangular, circular, or custom geometries
• Thickness customization available
• Custom mounting and edge finishing supported

Thin Film Coating Technologies

Our optical filters are fabricated using precision thin-film deposition technologies designed for high uniformity and durability.

Available coating processes include:

• Electron Beam Evaporation
• Ion-Assisted Deposition (IAD)
• Magnetron Sputtering
• Multi-layer dielectric coatings
• Metallic and hybrid coatings

These processes enable:

• Excellent environmental stability
• High laser damage threshold
• Improved adhesion and durability
• Low absorption losses
• Stable spectral performance

Typical Applications

Scientific & Research

• Spectroscopy systems
• LIBS systems
• Fluorescence microscopy
• Raman spectroscopy
• Photonics research

Laser & Imaging

• DPSS lasers
• Fiber laser systems
• Beam shaping optics
• CCD/CMOS imaging
• Machine vision systems

Industrial & OEM

• Optical sensing
• Biomedical devices
• Semiconductor inspection
• Analytical instrumentation
• Environmental monitoring

Custom Design Support

We support fully customized optical filter development based on your technical requirements. Our engineering team can assist with:

• Coating design optimization
• AOI (Angle of Incidence) tuning
• Polarization-sensitive designs
• Multi-band filter development
• Environmental and durability requirements
• Prototype evaluation and iteration

Typical information required for quotation:

• Filter type
• Center wavelength (CWL)
• Bandwidth (FWHM)
• Transmission/reflection requirements
• Angle of incidence
• Substrate material
• Dimensions and quantity

Quality & Inspection

Each optical filter can be inspected and tested for:

• Spectral transmission/reflection
• Surface quality
• Dimensional tolerance
• Coating adhesion
• Visual cosmetic inspection

Test reports and transmission curves may be available upon request.

Request a Quote

Please send your detailed specifications (support@design-realized.com), including wavelength range, filter type, dimensions, optical requirements, and quantity. Our engineering team will review your request and provide a quotation and estimated lead time.