PHASER - new LED/laser technology especially for the endoscopy

09.11.2012
Application:  Medical applications
Technology:  Laser, LED
Target group:  Operators of health care facilities

PHASER - new LED/Laser technology

PHASER – a technology, that comes from the OSRAM research and now is presented to the public for the first time. With ITOS PHASER 3000 OSRAM launches already the first product, in which the technology is implemented. Specifically for medical & technical endoscopy, PHASER solutions are preferred, because they outperform conventional discharge and LED technologies.

The general principle of PHASER technology is simple and quite similar to a white LED. Actually, white LEDs are made of a blue LED diode with a yellow phosphor converter on top. This yellow phosphor converter turns the majority of the light - generated by the blue LED diode - into yellow light. When this yellow light mixes with the remaining blue light of the blue LED diode, the result is white light. Today's LED chip technology limits the maximum luminance of blue light that can be delivered, therefore the amount of white light that is generated also becomes limited.

PHASER technology works in the same way as white LEDs, but instead of converting the blue light of an LED diode into yellow light, the much higher energy density of multiple blue laser diodes is used. The blue light of these laser diodes can be perfectly focused on the yellow phosphor converter to create a luminance which is many times higher than what can be achieved from conventional white LEDs. This luminance level compares to the performance of powerful discharge lamps, but with much longer life, making PHASER technology a very interesting substitute in applications where such high luminance is needed (meaning a lot of light coming from a pin point size light source).

Advantages of PHASER compared to conventional lamps

  • 60 times longer lifetime
  • No content of UV or IR light
  • 50% power consumption of conventional Xenon lamps

Advantages of PHASER compared to white LED

  • Significantly higher light output (depending on the application, more than three times brighter)
  • No overdriving required (exceeding recommended drive currents is very common for many LED solutions)
  • Less noise due to lower cooling requirements
  • No change in color when dimming light output
  • No change in color over lifetime

ITOS PHASER 3000

ITOS PHASER 3000 is one of OSRAM's first products utilizing PHASER technology. ITOS PHASER 3000 is a laser-/LED-based high brightness module for fibre optic applications. This module is optimized for the integration into medical and industrial light sources using light fibres with 4.8 millimetres in diameters and providing a system acceptance angle of about 22 ° half angle. - This matches the standard requirements for rigid endoscopy. The nominal luminous flux within this tight angle limitation is 2,000 Lumen (+/-100 Lumen) and therefore matches the typical light output of a 300 Watt-Xenon lamp (at nominal power of 300 Watt) under the same etandue limitations. Today, ITOS PHASER 3000 is the only known SSL-product delivering the same brightness at the distal end of an endoscope as typically used conventional 300 Watt-Xenon lamps. - According white LED-solutions typically do not even reach half of this performance.

Advantages of ITOS PHASER 3000 compared to Xenon lamps

  • Up to 60 times longer lifetime resulting in significantly lower maintenance and spare part costs
  • Light output is free of any UV and IR content
  • Lower noise level due to lower cooling requirements
  • Highest operation reliability due to multiple autonomous light generating components
  • Sufficient light to close surgeries safely even in the unlikely event of multiple laser diodes or the integrated LED failed
  • Low energy consumption (< 50 % of Xenon lamps)

Advantages of ITOS PHASER 3000 compared to LED-solutions

  • Three to four times higher luminance
  • More than double as much light at the distal end of an endoscope
  • Much lower noise level due to low cooling requirements
  • Highest operation reliability due to multiple autonomous light generating components
  • Sufficient light to close surgeries safely even in the unlikely event of multiple laser diodes or the integrated LED failed

Definition of PHASER

The name PHASER results from portions of the words Phosphor and Laser, which are the central components of this technology.

LED - innovative, efficient, flexible

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