Eyepiece

Technical Information

Catalogue No: C0375
Category: Head-Mounted Equipment [HMD/NVG/Glasses]
Object Type: Module/Sub-Assembly/Component
Object Name: Eyepiece
Part No: None
Serial No: None
Manufacturer: Unknown
Division: Unknown
Platform(s):
Year of Manufacture: Unknown
Dimensions:
Width (mm):
59 
Height (mm):
72 
Depth (mm):
92 
Weight (g):
340 
Location: Archive Object Store
Inscription(s):

None

Notes:

This is an early prismatic eyepiece design probably from around the 1980’s. It was steadily refined to provide an ejection-safe Night Vision Goggle integrated within a specially designed helmet and also for the early Helmet Mounted Displays. The prism allows a straight through view but also projects an image from a CRT to the pilot’s eye. This system was used on the I-NIGHTS HMD for the US Navy. These early prisms were quite heavy, being solid glass, and gave a very forward centre-of-gravity.

Click to enlarge