Category : Optics (components, coatings, instruments and systems) > Optical instrumentation, systems and accessories

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"This is the first commercial prototype instrument embodying the concept of Cubic Illumination as described in a paper by Christopher Cuttle MA FCIBSE FIESANZ FIESNA LC to the UK National Lighting Conference 1998. Cubic Illumination - the light falling on the six faces of a small cube - shows how a three dimensional object or building will appear when looked at from different angles; it gives much more comprehensive infomation than the more common planar illuminance.

The Megatron CIM, Cubic Illumination Meter, uses six Megatron Type M 16mm photocells in cosine-correcting mounts on the faces of a small cube, fitted with an extendable handle and tripod bush. This is connected via a two metre cable to a data logger, specially developed by Eltek from the Grant Squirrel Data Logger 1000. The CIM can be used in three ways:

readings can be taken individually,
or six readings can be logged simultaneously at the press of the button,
or the instrument can be left to record readings at preset intervals between 1 second and 24 hours.
The meter covers a wide range of lighting conditions from 0.1 lux to 10 000 lux; each sensor can be set to one of two ranges: 0.1 to 5 000 lux or 1 to 10 000 lux.

The Squirrel Data Logger can hold up to 64 000 readings; the infomation can be down loaded to a PC or other spread sheet or graphed as required.

The instrument comes in a robust carrying case, complete with computer software and a comprehensive instruction manual.

Dimension (mm): H x W x D 145 x 380 x 320 (including handle); weight: 4 kg."

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