SP3 Custom Optics

In addition to standard optical components, we produce a wide variety of custom products using various materials with customer-specified tolerances.

Optical Design

We have powerful optical design software which enables us to optimise your custom requirements. Some of the main functions of this software include:

  • Waveplate Design
  • Geometric aberration calculations,
  • Automatic correction with ‘adaptive method’ and ‘damped least squares’ methodology,
  • OTF calculation with ‘autocorrelation’ and ‘DFT’ methodology,
  • Tolerance calculations.
Contact Us Now!

Windows and Wedges


Materials:  A full range of optical materials
Diameter:  1 – 500 mm
Thickness: as thin as 50um
Flatness:  l/20 @ 632.8 nm
Parallelism:  up to 0.5 arc seconds
Surface quality:  up to 10-5 scratch and dig

Contact Us Now!


We can supply lenses to your specification:

  • Spherical Lens
  • Cylindrical Lens
  • Achromatic Lens
  • Doublet and triplet Lens
  • Lens Assembly
Materials: A full range of optical materials
Diameter: 1 – 100 mm
Focal Length: 3 – 1,000 mm


We can fabricate high-precision Penta Prisms (up to 1″ at 90° deviation) and Beamsplitter Penta Prisms, Schmidt Prisms, Penta Roof-Angle Prisms, Polygonal Prisms, Porro Prisms, Pechen Prisms, Amici-Dove Prisms, Coupling Prisms, Hollow Retroreflectors.
Polarising Optics
We specialise in developing, growing and fabricating birefringent crystals, such as YVO4, a-BBO, LiNbO3, MgF2 and Quartz crystals. Many Polarising optical components have been developed based on our birefringent crystals, which include Glan Laser Polarising Prisms, Rochon Polarising Prisms, Polarising Beamsplitters, new Phase Retardation Plates, Achromatic Fresnel Rhomb Retarders, Birefringent Filters and Birefringent Wedges, etc.


With our experience orientating and fabricating high-quality nonlinear optical crystals, we ensure that the orientation of the crystalline axis is precisely maintained from first cut through to final assembly. We have a computerised system to produce large quantities of low-order and zero-order waveplates per month.

Special Coatings

Our coating department is able to do a wide range of coatings using our advanced coating machines, experienced coating engineers and the latest design techniques. The main coatings we provide are listed below. For more information about them, please visit our coatings pages.

  • Single Layer MgF2 Anti-Reflectance Coatings
  • Multilayer Anti-Reflectance Coatings
  • Multilayer Broad-Band Anti-Reflectance Coatings
  • Partial Reflective Coatings
  • a. All Dielectric Beam Splitter Coatings
    b. Metal Broad-Band Beam Splitter Coatings

  • High Reflective Coatings (Mirror, Total reflection)
  • a. Dielectric coatings: Narrow-Band, Broad-Band.
    b. Metal Mirrors: Protect-Al, Enhance-Al, Protect-Ag, Enhance-Ag, Protect-Au,Enhance-Au.

  • Filter Coatings
    a. Long Wavelength Pass Filter (LWP)
    b. Short Wavelength Pass Filter (SWP)

Inspection Instruments

Our quality control and assurance department sets a series of complete standards for the optical components. Every product is strictly inspected to meet our standards and specifications required by customers before dispatch. Inspection reports and pictures are available upon request. Some of the main inspection instruments are:

  • 0.5 arc second Goniometer
  • Laser plano Interferometer
  • Twyman green Interferometer
  • Pekin-Elmer Lambda 900 UV/VIS/IR Spectrophotometer
  • Zygo GPI-XP Interferometer(2)
  • Phase retardation measurement system
  • Pico-second Nd:YAG laser
  • 40mW He-Ne laser
  • CW diode pumped Green lasers
  • Spectroscopic Ellipsometers
  • Spherometer
  • Automatic Lens tester