The FELIN French modernization program for dismounted combat provides the Armies with info-centric systems which
dramatically enhance the performances of the soldier and the platoon. Sagem now has available a portfolio of various
equipments, providing C4I, data and voice digital communication, and enhanced vision for day and night operations,
through compact high performance electro-optics. The FELIN system provides the infantryman with a high-tech
integrated and modular system which increases significantly their detection, recognition, identification capabilities, their
situation awareness and information sharing, and this in any dismounted close combat situation. Among the key
technologies used in this system, infrared and intensified vision provide a significant improvement in capability,
observation performance and protection of the ground soldiers. This paper presents in detail the developed equipments,
with an emphasis on lessons learned from the technical and operational feedback from dismounted close combat field
In the context of a virtual retinal display, the exit pupil of the optical device is small, and for this reason, even small eye
movement of the user will induce losing the virtual image. In order to increase pupil size, we work on devices such as
diffuse surfaces, intended to expand emission angles of sources. Unfortunately, because of laser coherence, this type of
device will create speckle noise, which will degrade image quality.
In previous papers we have described in details how this noise is generated by a classical diffuser plate, and how to
specify devices in order to decrease this noise.
In this paper, we analyze another type of pupil expander: faceplates. In addition to this modeling, we compare both
devices and conclude that the faceplate is a better device than a classical diffuser.