公开(公告)号：US3981709A

公开(公告)日：1976-09-21

申请号：US565457

申请日：1975-04-07

申请人： Fumio Kondo ,  Masayuki Kondo ,  Tsuneyoshi Itoh ,  Koji Sato

发明人： Fumio Kondo ,  Masayuki Kondo ,  Tsuneyoshi Itoh ,  Koji Sato

IPC分类号： B24B9/14 ,  C03B23/09 ,  G02B3/00 ,  G02C7/02 ,  C03C15/00 ,  B24B1/00 ,  B24B7/00 ,  C03C19/00

CPC分类号： B24B9/14 ,  G02C7/02

摘要： In a toughened lens which has been subjected to chemical tempering process and then to edge grinding, the fracture strength can be greatly enhanced if the peripheral portion is chamfered with the angle of chamfering to the tangential line on the optical surface of the lens not greater than 45.degree.. This toughened effect is further increased by subjecting the chamfered peripheral portion to such a post treatment as mechanical polishing, chemical etching or thermal polishing.

摘要翻译： 在已进行化学回火处理，然后进行边缘磨削的增韧透镜中，如果圆周部分倒角至透镜光学表面上的切线的角度倒角，则可以大大提高断裂强度 45度。 通过对倒角周边部进行机械抛光，化学蚀刻或热抛光等后处理，进一步提高了增韧效果。