HUDs are still relatively new to GA aircraft, often because of cost alone. Mike Browne led the design of the F-35 HUD and the F-35 cockpit display while he was still working with Kaiser Electronics. He's now general manager of vision products for Los Gatos, California based SA Photonics. SA builds vision products like augmented and virtual reality displays for the military. Brown told Flying the cost of a HUD for a single F35 costs about $600,000. SA Photonics unveiled a prototype of a wearable GA HUD the company believes it could have ready for sale before the end of 2020. SA was already contracted with the Air Force to solve problems the branch might not even know it had and to create an answer that would also have commercial applications. Browne said while last year was his first AirVenture, he left knowing there was a way SA could leverage its previous Air Force contract work for the GA marketplace.