OptiConsulting

OptiConsulting Limited is a specialist optical testing and consultancy laboratory based in Buxton, England, with more than 40 years of accumulated expertise in optical measurement, investigation and advisory services. The business traces its professional heritage to British Rail Research and Scientific Services, where the founding team developed deep technical knowledge in the optics of transport infrastructure. The OptiConsulting brand was formally established in 2003, since when the laboratory has grown into one of the UK's leading independent specialists for the optical testing of transport signalling, signage and lighting products across the rail, highway and maritime sectors.

The laboratory's core service offering encompasses photometric and spectroradiometric measurement, optical measurement and product assessment, lighting surveys and optical field measurements, and comprehensive technical and accident investigation work. Photometric testing includes measurements of luminous intensity, luminous intensity distribution, chromaticity and luminance — all traceable to national standards via NPL-calibrated lamps. Spectroradiometric testing characterises the spectral power distribution and colour properties of light sources used in safety-critical signalling and signage applications, providing objective, defensible evidence for product approval and regulatory compliance.

A defining capability of OptiConsulting is its dedicated optical test laboratory, which features a darkroom facility equipped to measure colour, luminous intensity, luminance, sun phantom phenomena and contrast for transport-sector products. For railway applications, the laboratory operates an 800-metre open outdoor test site enabling realistic, long-range signal readability assessments, supplemented by dynamic testing that replicates real-world viewing conditions at speed. Field-based services extend to in-situ illuminance surveys and photometric performance measurement of installed lighting and signalling systems at highways or rail sites.

OptiConsulting achieved UKAS accreditation to ISO/IEC 17025:2017 for its optical testing and calibration services in February 2021. The accreditation scope covers photometric measurements — including luminous intensity, luminous intensity distribution, chromaticity and luminance — as well as the calibration of PTP/Testworks VADER systems used in the testing of visual warning beacons to EN54-23. Accredited test reports issued by OptiConsulting are accepted as technical evidence for CE marking (EU market) and CA marking (UK post-Brexit) purposes, making the laboratory a practical resource for manufacturers building product conformity assessment dossiers.

Beyond routine product testing, OptiConsulting provides substantial technical investigative consultancy. The team undertakes accident investigation assignments involving optical factors — assessing whether a signal, sign or lamp met its published performance specification at the time of an incident — and supplies expert witness opinion for legal, coroner and insurance proceedings. Research and development support is available to manufacturers and transport authorities developing new signalling technology, lighting systems or retro-reflective signage, helping clients interpret measurement data, optimise product designs and navigate the regulatory landscape efficiently.

OptiConsulting has contributed to standards development for more than 20 years, providing technical input to BSI (British Standards Institution), CEN (European Committee for Standardisation) and ISO working groups covering transport lighting and signalling. The company is a recognised TOPAS (Transport Optical Performance Assessment System) approved Technical Assessor, an industry designation that underpins its authority in the formal assessment of traffic signal and transport lighting products in the UK. It is also a member of ARTSM (the Association of Road Traffic Sign Manufacturers), further embedding the laboratory within the professional bodies and industry associations it routinely supports.

OptiConsulting's client base includes manufacturers of traffic signals, railway signals, road signs and transport lighting equipment; rail operators and infrastructure managers; highways authorities; maritime signalling product developers; and independent research organisations requiring traceable photometric or spectroradiometric data. With a focused expert team, NPL-traceable measurement infrastructure, UKAS-accredited reporting, and a proven record spanning accident investigation, R&D consulting and standards committee work, OptiConsulting represents a credible and specialist testing partner for any organisation working with optical performance requirements in safety-critical transport applications.