| 摘要 |
THIS INVENTION AIMS AT, IN AN OPTICAL ELEMENT HOLDER FOR HOLDING AN OPTICAL ELEMENT SUCH AS A LENS WHEN GRINDING OR POLISHING IT, RELIABLY PREVENTING, WITH A SIMPLE ARRANGEMENT, A DEFECT SUCH AS A CRACK, CHIP, OR THE LIKE IN THE OUTER PERIPHERAL EDGE OF THE OPTICAL ELEMENT, WHICH OCCURS IN THE OPTICAL ELEMENT HOLDER. IN ORDER TO ACHIEVE THIS OBJECT, IN AN OPTICAL ELEMENT HOLDER 1 INCLUDING A HOLDING MEMBER 2 FOR SUPPORTING A CONTACT SURFACE LA OF AN OPTICAL ELEMENT L SUCH AS A LENS THROUGH AN ELASTIC SHEET 4, AND A CYLINDRICAL HOLDING FRAME 3 ATTACHED AROUND THE HOLDING MEMBER 2 AND HAVING AN INNER CIRCUMFERENTIAL SURFACE 3A MATCHING THE OUTER DIAMETER OF THE OPTICAL ELEMENT L, A RELIEF 6 IS FORMED IN THAT PORTION OF THE INNER CIRCUMFERENTIAL SURFACE 3A OF THE HOLDING FRAME 3 WHICH OPPOSES AN OUTER PERIPHERAL EDGE LC OF AN OUTER CIRCUMFERENTIAL SURFACE LB, ON THE CONTACT SURFACE LA SIDE, OF THE OPTICAL ELEMENT L. EVEN IF ABRASION OR BEHAVIOR RESULTING FROM A SMALL BACKLASH BETWEEN THE OPTICAL ELEMENT L AND OPTICAL ELEMENT HOLDER 1, MACHINING, OR THE LIKE CAUSES AN IMPACT REPEATEDLY, THE IMPACT DOES NOT ADVERSELY INFLUENCE THE OUTER PERIPHERAL EDGE LC, SO A DEFECT SUCH AS A CRACK OR CHIP IS NOT FORMED IN THE OUTER PERIPHERAL EDGE LC OF THE OPTICAL ELEMENT L. AS A RESULT, GRINDING OR POLISHING CAN BE PERFORMED STABLY.
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