Helmet with Ground Owl™ Goggles

Catalogue Number	C0997
Sub-categories	Head-Mounted Equipment [HMD/NVG/Glasses]
Location	Rack RAA15 (HMDs) [Mezzanine Store]
Object Type	Display Unit
Division	Unknown
Platform
Manufacturer	Unknown
Part No	?
Serial No	021
Dimensions	Width (mm):270 Height (mm):240 Depth (mm):340 Weight (g):1745
Inscription(s)	[helmet] Alpha Helmets Limited, Wheathampstead, Hertfordshire, England ──────────────── [NVGs] S/No 021 ──────────────── [badge 1] GEC Avionics Night Owl ──────────────── [badge 2] Cats Eyes GEC Avionics
Notes	The Night Owl™ Night Vision System was developed primarily for helicopter use. The Goggles consist of two identical channels, each channel comprising an objective lens, image intensifier (Generation 2 or 3) and an eyepiece assembly. The two channels interface with a cross-slide assembly which ensures correct orientation of the channels and also provides interpupillary and tilt adjustment. The cross-slide assembly interfaces with the helmet mount which provides the fore/aft adjustment flip up capability and vertical adjustment. Incorporated within the helmet mount is the power source of two batteries and a three position switch to select power on/off and standby. The large (25mm) eye relief allows excellent peripheral vision and good ‘look under’ capability for look around monitoring. The unit weight is about 700gms and this set of NVG is on an Alpha Helmet with model binocular Ground Owl™ Goggles. It is not believed that there were any sales of this version. The design originated with Ferranti and in turn that work derives from work done at the RAE. A full specification will be found in the brochures D0032.

The Ground Owl™ Modular Night Vision System is a modular design with a range of options and applications from the core system including:

Hand held night viewing
Monocular or binocular configuration
Hands free use with head mounted system
Range of magnification options
Camera mounting
Rifle Mounting
Infra Red Torch for absolute darkness operation

The core of the system is a monocular assembly which, with its self-contained power supply, can be used as a lightweight hand held viewing device. The complete system comprises the following components from which can be selected any combination to suit customer requirements: