7 Use of the BIOM 4
Instruction manual BIOM 4 (G/54400/1011/en) 11 / 34
working distance between the cornea and the front lens (bottom surface) is approx.
10 mm.
The outside diameter of the lens mount is 19 mm.
53604 90D lens, very good resolution; standard lens for most applications; maxi-
mum field of view with this lens is approx. 90º, whereas the working distance is ap-
prox. 8 mm.
The outside diameter of the lens mount is 19 mm.
53602 Wide-Field (E)-lens, good resolution; provides the largest field of view, large
depth of field; top-selling lens, first choice of experienced surgeons; the maximum
field of view with this lens is approx. 120º, whereas the working distance is approx.
3-4 mm.
The outside diameter of the lens mount is 19 mm.
53601 Wide-Field-lens for deep set eyes; the maximum field of view with this lens
is approx. 70°, whereas the working distance is approx. 3-4 mm.
The outside diameter of the lens mount is 12 mm.
Note
All steam autoclavable front lenses mentioned above, have a thin, amorphous carbon
coating and must be sterilized in steam autoclaves.
Disposable lens set
Beside the re-sterilizable lenses, there is also the possibility to use a disposable lens set
for most types of microscopes.
fig. 7-3: Disposable lenses (image similar)
The disposable lens set consists of wide field front lens with about 120° field of view,
working distance approx. 3 - 4 mm. The included reduction lens is designed to work with
microscope objectives with a focal length of 175 mm and 200 mm.
These lens sets can be used with BIOM 4m and BIOM 4c (not with the long versions BIOM
4ml and BIOM 4cl).
For detailed information please see the instructions for use for the "Disposable
BIOM Wide Field Lens-Set" attached to this instruction manual.
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