F-22 HUD Prototype Optical Module & CRT Assembly

Technical Information

Catalogue No: C0078
Category: Head-Up Display [HUD]
Object Type: Module/Sub-Assembly/Component
Object Name: F-22 HUD Prototype Optical Module & CRT Assembly
Part No: 2501-00065
Serial No: PL2884
Manufacturer: Pilkington PE
Division: Unknown
Platform(s): F-22 Raptor 
Year of Manufacture: Unknown
Width (mm):
Height (mm):
Depth (mm):
Weight (g):
Location: Archive Object Store

[Optical Module]
Part No. 2501-00065
serial No. PL2884
Mfr. Code K6111
Mfr. Part No. 049240
Contract No. F33657-82-C-2038
Rank Brimar
Cathode Ray Tube
Made in England
CRT Type X442-S3
GEC Av Part No 00013
Serial No
Factory Ident No D9744
Code Ident K3971
Date Code 8714
Tube Unit Assembly K0656
S/N K0656C0011
NSN - - -
[Circuit Board]
K0656 ASSY 229-029553-02
Ser K0656C0013
CRT Matching
NSN - - -


In 1981, the US Air Force developed a requirement for an Advanced Tactical Fighter (ATF) as a new air superiority fighter to replace the F-15 and F-16. In April 1991, the Lockheed Martin YF-22 was announced as the winner of the ATF competition. The production F-22 model was unveiled in April 1997 at Lockheed Georgia Co. and first flew in September 1997. Production deliveries commenced in 2003.
During 1986 the Company research team (FARL) were beginning to make significant achievements on the use of Computer Generated Holograms (CGH) for HUD optics. A theoretical design showed the feasibility of a design with a 35° off-axis angle being capable of installation in the F-16 envelope. Additional benefits were Combiner transmission of 80% and optical system end to end transmission of 40% compared to 20% on the conventional F-16C/D design resulting in a much brighter display. This work involved collaboration between FARL, ADD and the Hirst Research Centre at Wembley and Marconi Research Centre at Great Baddow who provided the CGH and Hologram manufacturing facilities respectively. By 1989 this design was targeted at the proposals for EFA (European Fighter Aircraft ultimately to be the Typhoon) and also for the ATF (Advanced Tactical Fighter ultimately to be the F-22). ADD had begun the fabrication of a demonstrator which was completed by the end of 1991. This demonstrator consisted of a complex optical system containing tilted and de-centred lenses, aspheric components and a single holographic Combiner designed with the aid of CGH. The ‘double bounce fold ‘ arrangement was novel and was patented.
In 1991 the Company was selected to provide a cursive only variant of this design for the Advanced Tactical Fighter which became the USAF F-22 Raptor. The HUD order for 400 systems was part of a £300M package which also included the Pilot’s Control Stick and the integrated Vehicle Management System.

This is a prototype model.

Click to enlarge