Wspólnotowy Serwis Informacyjny Badan i Rozwoju - CORDIS

Laser scanning module capable of providing a synchronised interrogation of a two-dimensional area

A two dimensional (horizontal and vertical) scanning module has been designed for attachment to the laser pointer gas detection instrument. This scanner module is based on low cost, low speed scanning technology and utilises a mechanical scanning technology in order to accurately control the movement of a base plates onto which the laser pointer is mounted.

A combination of flexure hinges and offset cams with suitable cam followers are utilised in order to provide a controlled angular rotation of the baseplate in two directions. The amount of angular rotation is easily controlled, via careful cam design, and is optimised in conjunction with the field-of-view of the gas detection laser pointer. Synchronisation of the scanner is accomplished via an optical encoder wheel attached to the slow scan axis shaft and can be designed to produce a TTL pulse every line of scanned data or every frame. The scanner attachment can be easily removed from the gas detection laser pointer in order to facilitate the use of the instrument in pointer mode.

The scanner module has been designed on the basis of providing a low-cost low-speed device which can be easily tailored for a range of different angular scan ranges and resolutions. In addition one dimensional scanning is readily possible with a minimal design change.

Potential Applications:
Applications which require the translation of an imaging or sensing system over a predetermined one-dimensional or two-dimensional field-of-regard (FOR). These may be in areas, but not limited to, in the field of boundary chemical special monitoring, low-cost thermal imaging and camera (imaging and nonimaging) sensor translation.

Innovative features/Benefits:
The above system is simple to operate and low-cost especially when compared with standard optical scanning technologies used for relatively large mass devices. It can be readily modified to cover different FORs and easily optimised to accommodate different sensor systems. The principal benefit of this system is however its modular nature, inherent reliability, hardwired data synchronisation and low-cost.

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Reported by

AOS Technology Ltd
46 Pate Road 46
LE13 0RG Melton Mowbray
United Kingdom
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