| 摘要 |
An apparatus (10) for use as a borescope or endoscope comprises a tube having proximal and distal ends, means in the tube for gathering an image of an object and transmitting it to a viewing device and optical fibres for transmitting light though the tube from the proximal to the distal end. The optical fibres are arranged in annular form and present an annular end face (18) at the proximal end of the tube. The apparatus (10) also comprises an annular light source (20), which may be an array of light emitting diodes (LEDs), at the proximal end of the tube adjacent to the annular end face (18) of the fibres and a ring lens (28) mounted between the annular light source (20) and the annular end face (18) of the fibres.
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