Patent ID: 8506354

Claim:
A cup attaching apparatus for attaching a cup serving as a machining jig on a surface of a lens, the apparatus comprising: a white LED which is an illumination light source for illuminating a lens placed on a lens supporting member; a screen applied with an alignment mark, on which screen an image of the lens illuminated by illumination light from the white LED is projected; a movement device which moves the cup set in an arm toward the lens along a reference axis for cup attachment, the position of the reference axis being associated with the alignment mark; a light intensity increasing and decreasing device which increases and decreases light intensity of the white LED in response to an operation signal from an operation member to be operated by an operator, the operation member being placed on a front of a housing of the apparatus; a switching signal input device for inputting a turn-on/off switching signal to turn on/off the white LED; and a control device which is operated in response to the turn-on switching signal to slowly increase turn-on light intensity of the white LED up to light intensity set by the light intensity increasing and decreasing device within a time determined in consideration of miosis of a pupil of the operator.