US 6,652,511 B1Granted

Laser treatment apparatus

AssigneeNidek Co., Ltd.

InventorSeiki Tomita

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Abstract

A laser treatment apparatus includes an aiming light optical system (9-16) for delivering an aiming light to an intended affected part, a laser irradiation mechanism including a laser source (1) for emitting a laser beam for treatment and an irradiation optical system (2-4, 7-9, 13-16) for delivering the treatment laser beam emitted from the laser source to the affected part, a focal shift mechanism (8, 43, 86) for shifting a focal point of the treatment laser beam from a focal point of the aiming light, a position setting mechanism (41, 50, 57, 90, 90a, 90b, 91) for changeably setting an initial focal point of the treatment laser beam to a desired point, a command signal input mechanism (105a, 57, 90, 90a, 90b, 91) for inputting a command signal to change the focal point of the treatment laser beam to the initial point, and a control unit (40) for controlling the focal shift mechanism to change the focal point of the treatment laser beam to the set initial point in response to the input command signal.

Claims13

Dependent claims

A laser treatment apparatus including:

an aiming light optical system, having a first central optical axis, for focusing an aiming light upon a first spot on an intended affected part, said first spot being at a focal point of the aiming light;
laser irradiation means including a laser source for emitting a laser beam for treatment and an irradiation optical system, having a second central optical axis, for focusing the treatment laser beam emitted from the laser source upon a second spot on the focal point of the aiming light and causing coincidence of the second spot of the treatment laser beam with the first spot of the aiming light, said second spot being at a focal point of the treatment laser beam;
shift amount input means for inputting a shift amount of the focal point of the treatment laser beam to be shifted from the focal point of the aiming light in a direction of the second optical axis;
focal shift means for shifting the focal point of the treatment laser beam from the focal point of the aiming light in the second optical axis direction based on the input shift amount so as to displace the second spot of the treatment laser beam from the first spot of the aiming light in the second optical axis direction;
a setting switch for inputting a setting signal;
memory means for storing the input shift amount as a standard value in response to the input setting signal;
command signal input means for inputting a command signal to shift the focal point of the treatment laser beam based on the stored shift amount;
and
control means for controlling the focal shift means to shift the focal point of the treatment laser beam from the focal point of the aiming light in the second optical axis direction based on the stored shift amount in response to the input command signal.

6 more elements

Dependencies are inferred from the claim text.