Apparatus (2) for providing a simulated night vision goggle display, which apparatus comprises night vision goggle means (4), reflective micro-display means (6) for illuminating the night vision goggle means (4), tracker means (8) for tracking the attitude of the night vision goggle means (4), and image generator means (10) for providing infrared images to the night vision goggle means (4), the image generator means being such that it has a first channel which is used to drive the reflective micro-display means (6) with a high level of illumination, a second channel which is used to drive the reflective micro-display means (6) with a medium level of illumination, and a third channel which is used to drive the reflective micro-display means (6) with a low level of illumination. The display (6) is preferably a ferroelectric LCD panel and the three channels drive respective LEDs (34,36,38) with progressively lower outputs, for example using neutral density filters.
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