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Names of optical units Functions
Condenser lens Adjusts the condensing position for the main bulb filament.
Filter Selects the blue, red-free, ND, heat absorbing, UV cut, IR cut or
exciter filter according to the clinical purpose.
Projection lens Projects and focuses the slit image.
Diffusion lens Widens the illumination field when photographing the anterior
eye section.
Reflection mirror Reflects the slit image to project it into the anterior eye section.
Microscope objective lens
Magnification drum lens
Eyepiece objective lens Used to focus the observed image in the eyepiece and to align the
optical axis.
Image erecting prism Changes the inverted image in the microscope to the erect one
and adjusts the rotation centering axis to prevent the image from
moving due to the pupillary distance shift.
Eyepiece Magnifies the observed image in the microscope and adjusts the
diopter to the patient's eye.
Color temperature conversion filter
Barrier filter By combining with the exciter filter installed to the illumination
system, observes and photographs the anterior eye section in flu-
orescent light.
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