As a laser diode approaches the end of its operational life, its imminent failure is signalled by an increase in the current being drawn from its drive circuitry. Typically, when the current draw reaches a value of 120% of its original operating value, the laser diode is considered to have reached its “Near End of Life” condition.
PM-NEOLD laser diode modules have an integral “Near End of Life Detection” facility which is set to respond when this condition has been reached. The generated signal can be utilised by the user to trigger an audible alarm or an LED warning light. The circuit is set to be fail safe, i.e. if there is a wire breakage, the alarm signal will be triggered.
The highly reliable and efficient laser modules have optical output powers from 0.9mW to 18mW at a lasing wavelength of 635nm, power stability greater than 5 percent, operating voltage of 3-6V DC and operating temperature from -10 degrees to + 50 degrees Centigrade. The lens may be adjusted to produce either a collimated beam or a focused spot, or replaced by other optical systems such as line generators.
The PM-NEOLD range of laser modules has been designed as a complete laser diode solution for OEM use in diverse applications such as industrial alignment and positioning, medical fluorescence and bar code readers.
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