Kabushiki Kaisha Topcon

Tokyo Kagaku Kakai Kabushiki Kaisha

Masatsugu Kijima

Hiroshi Koizumi

Yuko Tomioka

Sinya Tanaka

A laser treatment apparatus is to treat a site of disease of a patient with a laser beam. The laser treatment apparatus contains a source of illumination light for irradiating a site of treatment of the patient and a site around the site of treatment with the illumination light; a source of aiming light for irradiating the site of treatment with the aiming light; a light-receiving device for receiving a light reflected from an aiming site to which the aiming light is applied and from a site around the aiming site; a setting means for comparing a ratio of a quantity of light reflected from the aiming site, as received by the light-receiving means, to a quantity of light reflected from the site around the aiming site with a predetermined ratio; and a control unit for controlling an illuminance of the aiming light with respect to the illumination light by adjusting a ratio of the quantity of light reflected from the aiming site to the quantity of light reflected from the site around the aiming site so as to reach a predetermined ratio.

Contrast adjustor for aiming laser

A laser treatment apparatus for determining that the output power of a treatment laser beam is proper in accordance with the selected output power. The treatment apparatus comprises a laser source for generating a treatment laser pulse beam, a laser optical path for guiding the treatment laser pulse beam toward an object to be treated, a power setting means for controlling the laser source to set the power output of the treatment laser pulse beam, and a radiation switch for selectively switching the laser source on and off. A safety device is provided to cause the laser source to output a checking laser pulse beam prior to actual transmission of the treatment laser pulse beam and at a time after the activation of the radiation switch. The checking laser pulse beam has a power corresponding to the actual power of the treatment laser pulse beam to be outputted by the laser source. A power detector detects the power output of the checking laser pulse beam and a comparator determines whether the power output of the checking laser pulse beam is correct in view of the power of the treatment laser pulse beam set by the power setting means.

Growing community of inventors

Tokyo, Japan

Masatsugu Kijima