Video projectors need to be integrated into a wide range of applications, often requiring the use of ultra-wide-angle projection lenses or third party auto-alignment systems. As a result, some projectors may need less conventional forms of blending, and that’s exactly what we offer.

Our technologies have been designed to generate a perfectly seamless image across multiple projector channels and our highly flexible in-house design tools allow us to design and produce glass or film masks unique to your display for pixel-perfect projection channel edge-blending.

We have collective experience of more than 80 years in the field of displays for simulation, training, leisure and attractions. We design and produce multi-channel optical blending solutions for challenging projection environments, with no limit to display size, screen shape or projector count.

GBvi is a partner to systems designers, engineers and display system integrators – helping to overcome display challenges of complex projection systems. We fit into the ‘back end’ of a visual system, providing the last building block to complete the solution. We are able to bring our display design and technology development background into play so that we become an integral partner and team member for our customers.  We also have close working partnerships with parallel companies offering complementary solutions such as image servers and auto-alignment systems.  By specialising in this niche, we can enable any display or visual systems integrator to produce the best result for the end-user.

Visual innovation is at the core of our business. We continually prototype new technologies and work with unique setups that lead us to devise increasingly innovative approaches to ensure display perfection. We work very closely with all major projector manufacturers, who provide loan units for analysis and test, so we can provide the best performance at the lowest risk.

Our Clients and Partners include

Our Team

Geoff Blackham
Geoff Blackham

Founder & Director

GBvi Founder, Geoff Blackham, has more than 30 years’ experience in the simulation industry as engineer and board-level director. His main focus has been simulation display systems engineering and technology development, as well as being key to the growth of the leading simulation displays firm SEOS from 1989 until its 2008 acquisition by Rockwell Collins. In 2011, Geoff decided to go his own way and formed GBvi, initially offering consultancy and design services to display systems integrators. Then, in 2014, the company evolved to become a visual displays product innovation company. As innovator of many display developments, Geoff holds numerous root patents and applications. Experience and areas of specialisation include ultra-high-contrast projector development, display system development (real image and collimated) and NVG simulation. He occasionally ventures out to speak at Simulation and Training conferences.

Dan Blackham
Dan Blackham

Operations Director

Dan has 9 years’ experience in the Engineering, Simulation and Entertainment industries. He spent time at Rockwell Collins STS as Systems Technician calibrating high-performance projectors (both in the field and in the lab) in preparation for installation in high channel count domes. He spent another two years as Systems Engineer for 7thSense Design where he developed extensive experience configuring and installing high performance media servers. Dan’s time at 7thSense gained him valuable experience and expertise in display systems through working on a wide variety of projection systems including planetaria, theme park dark rides, museum exhibits and projection mapping on buildings. Dan joined GBvi in early 2014 as a systems engineer and quickly became involved in all aspects of GBvi’s technical and administrative requirements. Dan plays a leading role in specifying customer solutions, designing custom blending systems, project management as well as being involved in new product development and continuing to provide support to customers on site.

Steve Johnson
Steve Johnson

Opto Mechanical Engineer

Steve is a highly-experienced engineer with a successful track record in the design and development of precision opto mechanical products. During his 26 years in the visual display industry he has worked as a senior engineer at SEOS and Rockwell Collins and has been a key player in the design and development of Target Projectors, High Dynamic Range simulation projectors, multi-channel display systems and a high-performance HMD for human factors research.

Julie Blackham
Julie Blackham

Company Secretary

Julie has been working behind the scenes since the formation of GBvi, providing general administrative support. Having studied business and accounts in Crawley and Worthing, Julie has worked in accounts and finance at Edwards High Vacuum, Gripperods International, Christian Salvesen Edinburgh, Edinburgh University, also Lamb Technicon and Music Sales Ltd in Suffolk. With a BSc in Natural Sciences Julie has also worked for Royal Botanic Gardens Kew and for the NHS. But, with a sum of 27 years’ experience in general bookkeeping, payroll, management accounting, budgeting and auditing, she continues to use this expertise within GBvi, attending to the office administration aspects alongside the team, supporting in any way needed to keep customers, suppliers and employees happy.

Phil Scarfield
Phil Scarfield


Phil has been working with us for a little while now and has just joined full-time in a broad R&D / Engineering role. He has a wealth of experience in science and engineering, a keen interest in technical innovation and with skills & experience encompassing manufacturing process development, Proof of Concept testing, prototyping and project management, he is a great addition to the team. With 12 years’ experience in the simulation industry having worked at SEOS and then Rockwell Collins, Phil has an in-depth knowledge of high dynamic projection displays, rear projection technologies and NVGs. Phil is also a specialist in patents and intellectual property.

Sam Caruth
Sam Caruth

Graduate Mechanical Engineer

Sam joined the company in the summer of 2019 as a placement student from the University of Brighton, where he studied Mechanical Engineering. After completion of his placement year, Sam returned to university in September 2020 graduating this year (2021) in BEng (Hons) Mechanical Engineering. For his final year project he designed and manufactured a Micro-Adjuster for use in the simulation industry. We now welcome Sam back to the company full time in June 2021. His new qualification and his continued keen interest in maths and engineering along with his enthusiasm and experience within our company make him a great fit back with the team. He is a keen rugby player and cyclist and apparently plays guitar too, we are all looking forward to hearing that when parties are again allowed.

Martin King
Martin King

Systems Engineer

Martin joined us in January of this year as part of our growing engineering team. Prior to this he served 10 years in the RAF maintaining Harrier aircraft, servicing Puma and Merlin helicopter components, and on a variety of other aircraft operations. Since leaving the RAF Martin has graduated from the University of Brighton with a BSc (Hons) in Computer Science, where he gained experience in driving and aviation simulator systems engineering, including VR and motion systems. Martin was plunged into Lockdown within a month or so of joining us and had unusual but concentrated training in GBvi specifics. He is now involved in a number of our projects and will be out and about undertaking site visits once travel gets back to normal. His hobbies seem to be an extension of his work with interests in computing technology and simulation, particularly sim racing. In the real world he likes tinkering with old cars.

Simon Legg
Simon Legg

Senior Systems Engineer

Originally a Wiltshire lad, Simon studied maths, physics and computing from a young age leading him to Bournemouth University in 2005. He has worked within the simulation industry for over 10 years starting with SEOS, where he gained industrial experience whilst studying for his electronics degree. In 2009 he graduated from Bournemouth University as a Bachelor of Engineering in Electronics Engineering, then continued to work at SEOS, then Rockwell Collins and Real Time Integrators. Simon also spent 4 years working as a Software Engineer for General Distributions Ltd. In the summer of 2020 Simon became another full time member of our engineering team adding his expertise in systems engineering, advanced hardware design, and management. As part of his role, Simon leads our software engineering team and is heavily involved in underlying technical developments. Simon is quite possibly the most sporty member of our team, with young children to keep him busy he also manages to join football leagues, takes part in runs up to 15k, sometimes with added obstacles, and also enjoys racquet sports and DIY.

Laura Woods
Laura Woods

Business Administrator

We now have within our team a newly appointed Business Administrator. Laura studied Modern History and International Politics at Brunel University and brings a good ten years of experience as an administrator and another six years experience keeping records for a number of SME’s. Her previous employment includes working for a publishing company and a financial group and she is highly skilled using a number of different software and accounting packages. Outside of GBvi, Laura does have a family to keep her busy as well as responsibilities in her roles as Churchwarden and School Governor. Laura also likes baking and treats us all to her drizzle cake if we’re lucky.

Andrew Lucas
Andrew Lucas

Software Engineer Intern

This year we have taken onboard another student from the University of Brighton, he is working with our Software Engineer to gain experience during his mid-course placement year. Andrew is currently studying for a BSc (Hons) in Digital Games Development and is passionate about video games, CGI and programming. In his free time, he is learning how to develop an application for mobile devices, playing the guitar and recently started to learn how to play the piano.

IDSI has a solid relationship with GBvi – they consistently provide us with engineering services and first-class support that extend above and beyond what they’ve been contracted to deliver.

The team’s high-performance solutions enable us to fulfil high-end simulation application requests on our most challenging projects.

On-site, they are responsive to our needs and requests in near real-time – which allows us to maintain a track record of superior customer service and support across our many customer sites and projects.

George T. Forbes, President & CEO – Immersive Display Solutions, Inc.

Antycip Simulation uses GBvi technologies in a range of fast-jet and helicopter simulation applications – their experience, dedication to innovation and exceptional support, help us meet the technical and design challenges clients present us with.

It’s critical to our projects, that our technology partners maintain unrivalled levels of accuracy and attention to detail… GBvi is an excellent partner, in these regards, and far exceeds our expectations.

Riccardo Rovelli, Area Manager for Italy and Germany, Antycip Simulation

GBvi has been a great partner in our dome projects. Even under tight constraints, the company has always delivered a quality product on-time. The blend plates we’ve received for all our projects have always produced a great result with which our end clients are very satisfied. I highly recommend GBvi.

Paul Tetu, PRT Consulting

GBvi worked with us on a set of three, seven channel display systems for some training simulators. Optical blending was a retrofit for these systems, but Geoff and Dan were very helpful and professional throughout the design process. They conducted tests with the projector model in use, supported us in conducting some display system tests prior to manufacture, and provided clear information to help us complete the electronic and mechanical integration of their product with ours. GBvi supported the installation phase both directly and remotely – including the provision of test patterns to facilitate correct alignment. Any questions we had were answered quickly.

GBvi clearly take pride in what they do and care about the overall result for the end client, they keep the big picture in mind and there are no Teflon shoulders in sight! Beyond all of this, they have proven to us that optical blending is not prohibitively expensive, especially when planned properly.

James Kenny - Managing Director, Cursive Simulation
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