초록 ▼

The optical head of an installation for observation and treatment by a laser beam of an eye comprises a mirror disposed between an observing microscope and a focusing lens for reflecting towards the latter a treatment and a marking laser radiation beam forming a visible envelope of the treatment bea

The optical head of an installation for observation and treatment by a laser beam of an eye comprises a mirror disposed between an observing microscope and a focusing lens for reflecting towards the latter a treatment and a marking laser radiation beam forming a visible envelope of the treatment beam. That mirror has an outer portion intersecting the marking beam only and an inner portion intersecting the treatment beam only. That inner portion has a reflection coefficient which is maximum for the wavelength of the treatment beam and minimum for the wavelength of the marking beam, so that the latter only is allowed to reach the observing microscope after reflection on the zone of the eye to be treated.

대표청구항 ▼

The optical head of an installation for observation and treatment by a laser beam of an eye, comprising observing means for observing the zone of the eye to be treated, means for producing a treatment laser radiation beam, means for producing a marking laser radiation beam forming a visible envelope

The optical head of an installation for observation and treatment by a laser beam of an eye, comprising observing means for observing the zone of the eye to be treated, means for producing a treatment laser radiation beam, means for producing a marking laser radiation beam forming a visible envelope of the treatment beam, a focusing lens, the axis of which is coincident with the optical axis of the observing means for focusing the treatment and the marking beams on the zone of the eye to be treated, and a first mirror disposed on said treatment and marking beams between said observing means and said focusing lens for reflecting said treatment and marking beams towards said focusing lens, said first mirror having an outer portion intersecting only said marking beam, the reflection coefficient of said outer portion being maximum for the wavelength of said marking beam and an inner portion intersecting only said treatment beam, the reflection coefficient of said inner portion being maximum for the wavelength of said treatment beam and minimum for the wavelength of said marking beam, whereby said treatment beam is prevented from reaching said observing means after reflecting on the zone of the eye to be treated and said marking beam is able to reach said observing means after reflection on the zone of the eye to be treated.