HMD 120/40 is an innovative, lightweight stereo SXGA head mounted display with a large field of view. Specifically designed for simulation and visualization purposes, its mass is less than a kilogram when fitted with head tracking and allows the user to interact with a virtual environment in a way that has not previously been possible.

Innovative Technology

HMD 120/40 incorporates a patented new catadioptric eyepiece developed by SEOS, which is not conventionally refractive. The result is a large pupil, providing high tolerance to eyeball movement without losing regions of the field of view. It also incorporates a wide range of optical correction (+/- 4 diopter), so that spectacle wearers can be accommodated (removing the spectacles). The image distance can be varied from collimated to 0.25M by the use of the eyepiece focus adjustment.

Field of View

The field of view is an impressive 120°H x 67°V with 40° full-stereo overlap (50% of each eye) to give a full wrap around two-channel SXGA (1280 x 1024) image.

The Comfort Factor

Due to its a mass of less than a kilogram when fitted with head tracking, the HMD 120/40 exhibits no net lean either forward or backwards, so the need to secure as tightly to the head is reduced. The resultant slippage is low and comfort high. This ensures a more positive location and greater comfort.

Additional Options:

• Image source - Microdisplay-based field-sequential colour image display, which minimises colour break-up. Colour depth: full 24 bit colour
• Head Tracking - Any type of head tracker can be incorporated onto the HMD

Specification Summary
Resolution:	1280 x 1024
Colour:	Field-sequential
Field of View:	80° x 67° per eye
Eye Relief:	12mm
Overlap:	50% (resulting in 120x67 deg FoV with a 40x67 deg stereo overlap)
Interfaces
DVI input:	1280 x 1024 at 60 Hz.
Power supply:	115v/230v auto switching