Contrast adjustor for aiming laser
    1.
    发明授权
    Contrast adjustor for aiming laser 失效
    用于激光的对比度调节器

    公开(公告)号:US5057102A

    公开(公告)日:1991-10-15

    申请号:US524876

    申请日:1990-05-18

    摘要: 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.