Barr & Stroud. Tank laser rangefinder system Barr & Stroud. Optoelectrictronic materials, And associated anti-reflection coatings Barr & Stroud. Lightweight electro-optical sensor package Barr & Stroud. Periscopes and masts Barr & Stroud. Environmental test department Barr & Stroud. TOGS, Thermal observation & gunnery sight Barr & Stroud. IR18, Quality thermal imaging Barr & Stroud. Thermal scanner IR18 Barr & Stroud. IR18 thermal imager, In service Barr & Stroud.TOGS, Thermal observation gunnery sight Barr & Stroud. Periscopes and masts, Nuclear an diesel submarines Barr & Stroud. Submarine periscope retrofit
