Non-contact precision tool setting method for grinding aspheric optical element

• Main Authors: YUAN ZHIGANG, WANG JIAN, CHEN XIANHUA, XU QIAO, LI JIE, WEI QIANCAI, ZHOU LIAN, ZHANG QINGHUA, ZHENG NAN
• Format: Patent
• Language: Chinese; English
• Published: 08.04.2022
• Subjects: DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS; GRINDING; MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; PERFORMING OPERATIONS; POLISHING; TRANSPORTING

The invention discloses a non-contact precise tool setting method for grinding an aspheric optical element, which comprises the following steps of: fixing an oilstone at a position, which does not influence machining, beside the element while installing and fixing the optical element on a machine tool workbench; grinding a pit on the surface of the element by using a grinding wheel, fixing a laser sensor on a machine tool spindle, measuring the coordinate of the lowest point of the pit in a first coordinate system, and calculating the offset distance between the light spot of the measuring head and the lowest point of the grinding wheel; and the position of the aspheric optical element is further obtained, and the element-grinding wheel space position relation is established. The grinding wheel does not make direct contact with the element, the quality of the surface of the element is guaranteed, the tool setting precision reaches the micron level, the machining precision of the aspheric surface is improved,