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 Markham
Sam Markham

Technician Engineer

Sam joined the GBvi team with a highly relevant projector test & calibration background, having spent 7 years at Rockwell Collins Simulation & Training Systems. Following this time, he continued his technical career with the imaging company Rapiscan, where he spent 3 years building and testing precision X-ray components within a Class-1 clean room environment. As a technician engineer within GBvi, Sam continues to work in the lab and is heavily involved in our calibration, research and development activities.

Sam Caruth
Sam Caruth

Student Mechanical Engineer

Sam joined the company this summer as a placement student from the University of Brighton, where he is studying Mechanical Engineering. After completion of the placement year, Sam will return to university in September 2020 to complete his BEng (Hons) degree. Sam has a keen interested in maths and engineering and his enthusiasm, up-to-the-minute learning and CAD skills make him a great fit within our team. He is a keen rugby player and cyclist and will be putting all that energy to good use here at GBvi.

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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