Filters

Filters are used to control the wavelength or intensity of light. CVI Laser Optics makes it easy to find the right balance between optical performance, laser damage threshold, reliability, and cost for your application. 

Our filters are manufactured to meet optical tolerances to satisfy the needs of your application without adding unnecessary cost.

If you require a filter in a different size or shape, on a special substrate, or with slightly different optical properties, we can help. We regularly produce custom filters for OEM customers in high volume, and will work with you to design a filter that is optimized for your system’s technical and cost requirements. 

Capabilities

  Standard Custom Options
Types
  • Long wave pass
  • Short wave pass
  • Metallic neutral density
  • Dielectric filters
  • Absorptive neutral density
  • Other AOIs
Materials N-BK7, UV-grade fused silica  Optical crown glass, Schott optical glass
Dimensions 12.7 - 101.6 mm 5 to 150 mm
Quality Standard, precision and laser quality See manufacturing tolerances below

Filter Substrate Manufacturing Capabilities**

Surface Tolerances Standard Precision Laser Quality
Surface Quality
(scratch - dig)		  80 – 50 40 - 20 10 - 5
Surface roughness (Å, RMS) 60 20 5
Surface Figure
(P-V @ 633 nm before coating)

Commercial Polish
(3λ per 25mm)

 λ/2 λ/10
Dimensional Tolerances Standard Precision
Diameter (mm) +0/-0.25 +0/-0.10
Thickness (mm) ± 0.25 ± 0.10
Parallelism ≤ 5 arc min ≤ 10 arc sec
Clear Aperture ≥ 85% ≥ 85%

 

** Note: The general tolerance specifications above are intended to guide determination of appropriate tolerances based both on relative cost and manufacturability. Part-specific tolerances will vary depending on size, material, shape and aspect ratio. Tighter tolerances may be possible, so please contact us to discuss your custom specifications. All specifications do not need to be from a single column, though trade-offs may be required in order to meet the desired combination of cost and performance.