Illuminating system for contact lens ophthalmometer

Claim 1

A device for illuminating an object to be viewed with either of two different modes of illumination, a diffused mode and an undiffused mode comprising: an eye piece for viewing the object; a light source for illuminating the object, said light source comprising an incandescent bulb, a diffUser positioned over said incandescent bulb, said diffuser having an aperture therethrough for admitting a stream of undiffused light to pass through said diffuser; an elliptical reflector positioned to reflect light from said light source which passes through said diffuser toward the object to be illuminated; a reflector having a reflecting surface for directing said stream of undiffused light on to the object to be viewed; a movable shutter movably mounted for positioning in two alternate rest positions, a first rest position blocking the optical path between said aperture and the object, and a second rest position blocking the optical path between said diffuser and said elliptical reflector; and means for moving said shutter from said first position to said second position and vice versa to illuminate the object with either diffused light or undiffused light.

Claim 2

A device for illuminating an object to be viewed with either of two different modes of illumination, a diffused mode and an undiffused mode comprising: an eye piece for viewing the object; a light source for illuminating the object, said light source comprising an incandescent bulb, a diffUser positioned over said incandescent bulb, said diffuser having an aperture therethrough for admitting a stream of undiffused light to pass through said diffuser; an elliptical reflector positioned to reflect light from said light source which passes through said diffuser toward the object to be illuminated; a reflector having a reflecting surface for directing said stream of undiffused light on to the object to be viewed; a movable shutter movably mounted for positioning in two alternate rest positions, a first rest position blocking the optical path between said aperture and the object, and a second rest position blocking the optical path between said diffuser and said elliptical reflector; and means for moving said shutter from said first position to said second position and vice versa to illuminate the object with either diffused light or undiffused light.

Claim 3

A device for illuminating an object to be viewed with either of two different modes of illumination, a diffused mode and an undiffused mode and for illuminationg an object with either white or ultraviolet light comprising: an eye piece for viewing the object; a light source for illuminating the object, said light source comprising an incandescent bulb, a diffuser positioned over said incandescent bulb, said diffuser having an aperture therethrough for admitting a stream of undiffused light to pass through said diffuser; an elliptical reflector positioned to reflect light from said light source which passes through said diffuser toward the object to be illuminated; a reflector having reflecting surface for directing said stream of undiffused light on to the object to be viewed; a movable shutter movably mounted for positioning in two alternate rest positions, a first rest position blocking the optical path between said aperture and the object, and a second rest position blocking the optical path between said diffuser and said elliptical reflector; means for moving said shutter from said first position to said second position and vice versa to illuminate the object with either diffused light or undiffused light; and an interference type ultraviolet filter movably mounted for positioning into and out of said stream of light, said interference ultraviolet filter blocking a substantial amount of nonultraviolet light and permitting ultraviolet light to pass therethrough to illuminate the object with ultraviolet light when said interference type ultraviolet filter is positioned in said stream of light, said object being illuminated with white light when said interference type ultraviolet filter is positioned out of said stream of light.

Claim 4

A device for illuminating an object to be viewed with either of two different modes of illumination, a diffused mode and an undiffused mode and for illuminationg an object with either white or ultraviolet light comprising: an eye piece for viewing the object; a light source for illuminating the object, said light source comprising an incandescent bulb, a diffuser positioned over said incandescent bulb, said diffuser having an aperture therethrough for admitting a stream of undiffused light to pass through said diffuser; an elliptical reflector positioned to reflect light from said light source which passes through said diffuser toward the object to be illuminated; a reflector having reflecting surface for directing said stream of undiffused light on to the object to be viewed; a movable shutter movably mounted for positioning in two alternate rest positions, a first rest position blocking the optical path between said aperture and the object, and a second rest position blocking the optical path between said diffuser and said elliptical reflector; means for moving said shutter from said first position to said second position and vice versa to illuminate the object with either diffused light or undiffused light; and an interference type ultraviolet filter movably mounted for positioning into and out of said stream of light, said interference ultraviolet filter blocking a substantial amount of nonultraviolet light and permitting ultraviolet light to pass therethrough to illuminate the object with ultraviolet light when said interference type ultraviolet filter is positioned in said stream of light, said object being illuminated with white light when said interference type ultraviolet filter is positioned out of said stream of light.