| 摘要 |
A lens meter for measuring optical characteristics of a spectacle lens, the lens meter comprises: a measurement optical system (10) including a light source (11), a measurement target plate (14), and a light receiving sensor (15); a lens table (4) to place a lens to be measured, the lens table having an opening (4a) through which a measurement optical axis of the measurement optical system passes; a frame support member (5) including a frame support plate (51) having a contact surface with which a left rim and a right rim of a spectacle frame will contact, the frame support plate being to be moved in a direction toward the lens table by a guide mechanism (55), this direction being referred to as a forward direction while an opposite direction is referred to as a backward direction. The frame support member includes: a cutout portion (54, S) provided in the frame support plate and configured to allow the lens table to come in backward than the contact surface of the frame support plate when the lens is placed on the lens table to measure a point close to an edge of the lens, the edge being located on the frame support plate side, while the rims of the spectacle frame are in contact with the frame support plate; a pad (61) with which the rim will contact to prevent the rim from coming in the cutout portion, the pad being provided in at least a part of the cutout portion; and a pad moving mechanism (62, 63, 64, 65, 67a, 67b, 68, 69) to move the pad so that a surface of the pad is moved in the backward direction from the contact surface. |
