LENS DRIVE ABNORMAL NOISE INSPECTION METHOD AND LENS DRIVE ABNORMAL NOISE INSPECTION DEVICE

PROBLEM TO BE SOLVED: To highly accurately determine whether or not a lens drive sound is normal in a lens drive abnormal noise inspection method and a lens drive abnormal noise inspection device.SOLUTION: The lens drive abnormal noise inspection method is configured to: form a first acoustic pressure waveform expressing a relation between a time and an acoustic pressure and a second acoustic waveform expressing a relation between a frequency and the acoustic pressure on the basis of a lens drive sound (S11); calculate each area of a plurality of regions having the first acoustic pressure waveform divided for each value of the acoustic pressure (S12); calculate the number of traverses in which the first acoustic pressure waveform traverses each of a plurality of boundaries to be determined by the value of the acoustic pressure (S13); calculate each area of a plurality of regions having the second acoustic pressure waveform divided for each value of the acoustic pressure (S14); calculate the number of traverses in which the second acoustic pressure waveform traverses each of a plurality of boundaries to be determined by the value of the acoustic pressure (S15); and determine whether or not the lens drive sound is normal on the basis of the areas of the plurality of regions of the first and second acoustic pressure waveforms and the number of traverses of the plurality of boundaries of the first and second acoustic pressure waveforms (S16). 【課題】レンズ駆動異音検査方法及びレンズ駆動異音検査装置において、レンズの駆動音が正常であるかを高精度に判定する。【解決手段】レンズ駆動異音検査方法は、レンズの駆動音を基に、時間と音圧との関係を表す第１の音圧波形、及び周波数と音圧との関係を表す第２の音圧波形を作成し（Ｓ１１）、第１の音圧波形を音圧の値ごとに分割した複数の領域のそれぞれの面積を算出し（Ｓ１２）、第１の音圧波形が、音圧の値で定められる複数の境界のそれぞれを横切る横断回数を算出し（Ｓ１３）、第２の音圧波形を音圧の値ごとに分割した複数の領域のそれぞれの面積を算出し（Ｓ１４）、第２の音圧波形が、音圧の値で定められる複数の境界のそれぞれを横切る横断回数を算出し（Ｓ１５）、第１及び第２の音圧波形の複数の領域の面積と、第１及び第２の音圧波形の複数の境界の横断回数と、に基づいて、レンズの駆動音が正常であるかを判定する（Ｓ１６）。【選択図】図５