| 摘要 |
PURPOSE:To eliminate a shadow otherwise generated at the center of the eyeground in lighting by providing a harmful reflected light removing member in a lighting optical system to remove a harmful reflected light, based on an objective lens, in an eyeground camera for fluorescent photography having a barrier filter in a photographing optical system. CONSTITUTION:An exciter filter 7 transmits a very small quantity of illumination light with a wavelength longer than a lower-limit transmission wavelength A in transmission characteristic of a barrier filter 16. Excitation illumination light passing through the exciter filter 7 passes through a ring ratio stop 8 and a relay lens 9 containing a very small quantity of illumination light exceeding the lower limit transmission wavelength A in the transmission characteristic of the barrier filter 16 and reflected with a reflection mirror 10 to be introduced to a harmful reflected light removing member 11. The harmful reflected light removing member 11 presents a disc shape and circular dark, point areas 21 and 22 are formed at the center thereof. The excitation illumination light passes through the harmful reflected light removing member 11 containing the dark point areas 21 and 22 to light the eyeground R of an eye 20 to be inspected via a relay lens 12, a bored mirror 14 and an objective lens 13. This allows the avoiding of a shadow based on the dark point areas 21 and 22 otherwise generated at the center of the eyeground R.
|
