Description
This laser emits an intense monochromatic red beam of wavelength 630 – 640nm at
0.9mW (Class II operation). Typical beam divergence is approximately 1 millirad. The laser
is ideal for the demonstrationof the behaviour of light in a visually effective way, reinforcing
the practical work carried out by pupils using white light. It is an essential tool to develop
basic understanding of the passage of light through different media, slits etc. The laser
beam can be modulated by applying an external digital or analogue waveform to the
3.5mm jack socket on the rear panel. Alternatively the beam can be modulated by the
internal generator which produces 0.1µs pulses at approximately 1MHz. This allows speed
of light experiments to be easily performed. The passage of light through light guides and
optical fibres can be demonstrated by filling a glass or plastic tube or U-tube with very
dilute milk. The growth of laser based communication systems and research into the use
of lasers in computers of the future make this an essential piece of equipment to bring upto-date relevance into teaching. The laser is powered by a 6LR61 (PP3) battery or external
smoothed and regulated supply, has adjustable focus, no warm up time and has a key
operated safety switch. Housed in a robust anodised aluminium case. Supplied with ke.
SP4-1717
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