Filters

Perkins Precision Developments (PPD) manufactures color glass filters, band-pass filters, dichroic filters, coated interference filters and optical beam splitters for both R&D and OEM applications. Because we utilize Ion Beam Sputtered (IBS) coating technology, our AR coated long-pass filters, short-pass filters and beam samplers are environmentally stable, durable and easy to clean.
 
Precision optical filters and dichroic beam splitters are available in a variety of shapes and sizes from 2mm to > 4” in diameter and in a wide range of materials including fused silica and N-BK7 as well as Schott, O’Hara and Hoya colored glasses. 
 
Multi-layer coated filters and beam splitters offer better rejection and sharper cut-on and cut-off wavelengths than colored glass filters, and can be designed for specific laser wavelengths or for broadband light sources. However, colored glass filters are typically less expensive than coated filters and are often used for detection, attenuation and other broadband applications such as fluorescence microscopy and spectroscopy.
 
PPD manufactures custom optical filters and beam splitters for the ultraviolet, visible, and near-infrared wavelength regions.
 

Benefits

 
  • Low-cost, High-value
  • Custom manufacturing
  • Durable, easy to clean
  • Environmentally stable
  • Optional AR coatings

Options

  • Colored Glass Filters
  • Interference Filters
  • Band-pass Filters
  • Dichroic Filters
  • Long-pass Filters
  • Short-pass Filters
  • Laser-line beam splitters
  • Broadband beam splitters
  • Pick-off Beam Samplers

 

Filters Typical Best
Size 5mm-4" 2mm-6"
Surface Quality 40-20 10-5
Flatness(p-v)* λ/4 λ/20
TWD λ/4 λ/20
Roughness (RMS) 2Å 
OD Tolerance +0.0/-0.1mm +0.0/-0.025mm
Thickness Tolerance ± 0.10mm ± 0.02mm
Clear Aperture 85% 100%
Wedge < 5 arcmin < 10  arcsec
See Beam Splitters for Specs of Thin Film Coated Optical Filters