Lightmed LightLas 532/670, Руководство оператора

Страница: 102 / 127

Multi-Wavelength Pattern Scanning System - LightLas 532 / 670 – Operators Manual Rev. No 01
Page 101 of 126
2. Cleaning the Optics
The optical surfaces of the Laser System are; the objective lens, the illumination
tower prism, the eyepieces and any other Slit lamp accessory that may have been
purchased.
The process for cleaning all these optical surfaces is the same.
Moisten one end of a cotton tip (Q-tip) or a folded lens tissue (Kodak or similar) with
100% Methanol or Ethanol and then gently wipe across the optic. Use one Q-tip or
tissue per wipe then discard and repeat with a new one until the optic surface is
totally clean.
Never wipe an optic with a dry Q-tip or tissue, as this will scratch the glass.
7.2 Laser Beam Alignment Check
The Laser performance can deteriorate if the optics are not clean. It will depend on the
environment that the Laser System is used in how often the optics should be cleaned
however the optical surfaces should be cleaned at least every three months.
To check
the alignment of the Treatment Laser beam to the Aiming beam refer to the
procedure as detailed in the Installation procedure that can be found in Section 5 of
this manual. The beams should always be centered together because they are
delivered together by an optical fiber.
At the Target site (focal plane) it is also necessary to make sure the beams are
centered and focused in the center of the Illuminated spot. There are adjustment
screws for the Slit lamp LDU and for the LIO the Optics housing can be rotated to
adjust the horizontal plane and a mirror adjustment for the vertical plane.
There are no adjustments for the Endoprobes.
For all LDU’s it is important that the delivered Laser beams are round in shape as
this then means the alignment of the fiber to the internal Laser cavity is correct. If
this alignment is bad then the fiber may become damaged particularly at high power
settings.
If the output beam from the fiber is checked and whether with the Aiming beam or
the Treatment beam it is anything other than a round spot then there is a strong
possibility that the alignment of the Laser beams into the fiber has changed or the
fiber is damaged in some way. In either case it is important to get the alignment
checked by a Service person to verify if the system is OK to be used. If the output
beam looks OK with another fiber then it is most likely that the fiber is damaged and
the Laser alignment in the Console is OK.