|Category:||Head-Mounted Equipment [HMD/NVG/Glasses]|
|Object Type:||Display Unit|
|Object Name:||Helmet Mounted Display|
|Year of Manufacture:||Unknown|
|Location:||Main Object Store|
GEC Avionics Limited
This demonstrator Helmet Mounted Display has a complete day and night capability. The binocular optical system provides a fully overlapped 35°field-of-view. The helmet has two 25mm
CRTs, which can project an image into each eyepiece (similar to the Cats Eyes optics) and this image will overlay the direct view of the outside world. There are image intensified cameras located at each side of the helmet from which a night time image can also be projected into the eyepieces and combined with symbology as required. The HMD is a modular design in which the an inner helmet shell is form-fitted to the pilot for comfort and an outer shell upon which are mounted the electro-optical units appropriate for the planned mission. This outer module forms the front area of the helmet surrounding the face and includes the visor. INVS was the top of a range of helmet systems called Knighthelm which started with a simple monocular sight through to the full INVS. The system was used as part of the US Navy's I-Nights technology-evaluation programme.