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Knight Optical Ltd

Knight Optical's Metrology Laboratory and QA Department

At Knight Optical, quality control is of utmost importance and taken extremely seriously. We understand that if a drawing has a tolerance, surface specification and material type then the information is there for a reason. We will always ensure that all aspects of your drawing and specification are adhered to.


In order to meet our customers specifications, Knight Optical has invested a substantial amount of time and resources into developing an impressive metrology and quality assurance department. This is run by highly qualified staff, who are trained on the latest state-ofthe-art metrology instruments. This, combined with our professional business relationship, ensures you receive an excellent service you can trust.

Knight Optical have a strict quality system. Our management systems, standards and guidelines all comply with ISO9001:2008 standard. We also work to the following standards:

  • ISO10110 - Optical drawing standards
  • BS4301 - 1991 Preparation of drawings for optical elements and systems
  • MIL-C-14806A Coating, reflection reducing for instrument cover glasses and lighting wedges
  • MIL-G-174B Optical Glass
  • Watch our QA Video for more information   (https://youtu.be/XnqPD-G3gyA) is the link to insert.

All test data is recorded at Knight Optical and can be provided in a number of different formats, this includes a Knight Optical metrology report which clearly presents all the data in one table. Data can also be presented in the original formats produced by the respective software for each instrument.

Our trained technical inspection technicians
Our most valuable asset is our staff. We have a team of highly trained technicians checking all optical components to ensure they fully comply to drawing specifications and Knight Optical’s high quality standards.

Zygo Verifire XPZ + Interferometer System
  • Provides fast low uncertainty form measurements of flat or spherical surfaces, and transmitted wavefront measurement of optical components and assemblies
  • Interferometric Radius Slide (IRS) system combines linear measurements provided by the encoded rail and cavity measurements made by the interferometer to give highly accurate radius of curvature readings
  • ZYGO’s proprietary Mx® software offer a wide range of operational features and data analysis tools for unmatched measurement capability and reporting
  • Measurement accuracy of Lambda/20
Zygo Verifire XPZ
Varian Cary 5000 (+ UMA attachment)
  • Measures reflection, transmission and optical density of coatings and materials
  • Scan ability from 175nm-3200nm
  • Measures OD up to 8 Abs
  • State-of-the-art UMA attachment used to measure transmission, absolute reflection and scattering of optical components including complex cube beamsplitters and polarised optics at multiple angles of incidence
  • Measures S and P polarisation
Varian Cary 5000 (+ UMA attachment)
Agilent 660 FTIR Spectrophotometer
  • Measures transmission of IR materials and Coatings
  • Scan range ability from 1.67µm – 44.44µm
Varian Cary 660 FTIR
Starrett AV300
  • Non contact dimensional metrology for complex component such as graticules, metal assemblies and apertures
  • Measurement data for parameters including concentricity, corner radii, angles, and facet widths (fresnel lenses)
  • Automated processes for inspection of large volumes of optics
  • Automated Vision System - bright and darkfield illumination providing robust measurement for even the most challenging surfaces
  • Resolution down to 0.0001mm or 0.1µm.
  • Accuracy over the travel of the stage to within 4.5µm (dependent upon magnification)
  • 12:1 motorised zoom giving a wide range of enlargement from 25-500x magnification
  • Capacity up to 300mm in length
Starrett AV300
Trioptics Optispheric with Wavesensor Reflex

For testing lens parameters such as:

  • Effective focal length (EFL)
  • Back focal length (BFL)
  • Radius of curvature (ROC)
  • Modulation transfer function (MTF)
  • Flange focal length (FFL)

Fitted with a motorised V-Block accessory for testing centration errors <3 arcseconds in both transmission and reflection.

Trioptics OptiCentric
Fisba Interferometer
  • Phase-measuring 100mm aperture interferometer system
  • Non-contact high speed measurement of surface flatness and irregularity
  • Objective and precise measurement of transmitted wavefront error
  • Measurement accuracy of Lambda/20
Fisba Interferometer
Trioptics Prism Master
  • High speed electronic autocollimator with ultra precise motorized rotation
  • Completely objective high accuracy position measurement without operator input
  • Fully automatic angular measurements on prisms, beamsplitter cubes and polygons
  • Wedge measurement in optical windows
  • Accuracy of +/- 3 arc seconds (+/- 0.00083°)
  • Comprehensive measurement and analysis software allows customized measurement procedures to be created and saved
Trioptics Prism Master

In addition to our certification, our team of metrology technicians are trained in interpreting ISO10110 technical drawings for optical parts ensuring your specification will be followed exactly during testing. We also test to BS4301-1991, MIL-C-14806A and MIL-G-174B standards.

Call to find out more ......

Tel +44(0)1622 859444 | Email contact@knightoptical.co.uk

Tel +(001) 401 583 7846 | Email usasales@knightoptical.com

QA and Metrology Information Watch Our Corporate Video View Our Corporate Brochure
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