Slit-lamp biomicroscope

A slit-lamp biomicroscope which illuminates an eye to be examined with slit illumination light, the biomicroscope comprising:

• an illumination optical system provided with an illumination light source and a slit plate of which slit width is adjustable;
• a plurality of types of filters each having a different optical characteristic which are inserted into, and removed from an optical path of the illumination optical system;
• filter detection means for detecting a type of the filter being inserted in the optical path of the illumination optical system;
• slit width detection means for detecting the slit width;
• a photoelectric photographic optical system for photographing the eye, the photoelectric optical system also functions as an observation optical system;
• a display for displaying a photographed image of the eye as well as information about the detected slit width and the amount of illumination light;
• light amount change means for changing an amount of illumination light on a side of the illumination light source with respect to the slit plate;
• and
• control means for controlling the light amount change means such that the amount of illumination light is adjusted to an amount corresponding to the detected filter based on a detection result obtained by the filter detection means.

A slit lamp biomioroscope, for illuminating an eye to be examined, comprising:

• an illumination optical system provided with an illumination light source and a slit plate having an adjustable slit width;
• slit width detection means for detecting the slit width;
• light amount change means for changing an amount of illumination light on a side of the illumination light source with respect to the slit plate;
• and
• control means for controlling the light amount change means such that the amount of illumination light is adjusted to an amount corresponding to the detected slit width based on a detection result obtained by the slit width detection means;
• wherein the control means includes a memory for storing the illumination light amount that corresponds to an intended slit width.

A slit-lamp biomicroscope, for illuminating an eye to be examined comprising:

• an illumination optical system provided with an illumination light source and a slit plate having an adjustable slit width;
• slit width detection means for detecting the slit width;
• light amount change means for changing an amount of illumination light on a side of the illumination light source with respect to the slit plate;
• control means for controlling the light amount change means such that the amount of illumination light is adjusted to an amount corresponding to the detected slit width based on a detection result obtained by the slit width detection means;
• and
• a display for displaying information about the detected slit width and the amount of illumination light.

A slit-lamp biomicroscope which illuminates an eye to be examined with slit illumination light, the biomicroscope comprising;

• an illumination optical system provided with an illumination light source and a slit plate having an adjustable slit width;
• slit width detection means for detecting the slit width;
• light amount change means for changing a first amount of illumination light on a side of the illumination light source with respect to the slit plate;
• and
• control means, having a program for setting a second amount of illumination light that corresponds to an intended slit width and a memory for storing the second amount of illumination light that is set through execution of the program, for controlling the light amount change means such that the first amount of illumination light is adjusted to the second amount of illumination light corresponding to the detected slit width based on a detection result obtained by the slit width detection means and the stored second amount of illumination light.