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Ophthalmoscope or fundus camera with fibre optic illumination= - and only indirect illumination of the entrance pupil
Ophthalmoscope or fundus camera with fibre optic illumination= - and only indirect illumination of the entrance pupil
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机译:具有光纤照明的检眼镜或眼底照相机=-且仅间接照明入射瞳孔
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摘要
A contact lens (10, 10') fits on the cornea of a test person through which the inside of the eye can be observed, it is encircled by an inner ring (18, 18') of the optic fibres (38) and with an outer ring (16, 16') of optic fibres spaced from it. The light fibres are arranged in specific positions to form rings of specific radii whereby when the apparatus is in use the tips of the fibres form two predetermined angles for the inner and outer rings. Pref. the numerical aperture of the fibres is 0.55, the I.
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