Abstract: Generating a routing system for a three-dimensional model of a real-world object includes specifying a set of connections, applying a filter to the connections to prevent more than one connection having the same first connector and the same second connector from being rendered more than once, creating geometric entities that are curves and that represent the connections, and displaying the routing system in a visually simplified manner by rendering the plurality of geometric entities. Additionally, the connections can automatically be merged into a harness bundle.

Abstract: An objective lens system 10 uses Germanium lens elements including a positively-powered objective lens (A), a positively-powered intermediate lens (B) and a negatively-powered field lens (C). The field lens (C) flattens the Field curvature of the system. The intermediate lens (B) corrects astigmatism and has an aspheric surface (3).

Abstract: An afocal telescope operating in the thermal infra-red waveband has a three-element objective comprising a positively-powered central lens element disposed between positively powered and negatively powered lateral lens elements, the positively powered lateral lens element being located proximal to the inter-mediate image and incorporating a hybrid surface simultaneously to correct longitudinal and field colour, and wherein one of the positively powered lens elements of the objective is made of a material having a negative temperature refractive index co-efficient and has an optical power selected to render the telescope athermal.

Abstract: In an optical display system, information recorded on a face plate or like optical element is injected into a main optical path by means of a standby sight device comprising a lens unit and a flexible fibre optic bundle having a numerical aperture sufficiently large to cover the maximum acceptance angle of the lens unit.