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IMAGE PICKUP APPARATUS AND IMAGE PICKUP UNIT HAVING DEVICE FOR REMOVING FOREIGN SUBSTANCE DEPOSITED ON SURFACE OF OPTICAL MEMBER
IMAGE PICKUP APPARATUS AND IMAGE PICKUP UNIT HAVING DEVICE FOR REMOVING FOREIGN SUBSTANCE DEPOSITED ON SURFACE OF OPTICAL MEMBER
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机译:具有去除在光学元件表面上沉积的外来物质的图像拾取装置和图像拾取单元的装置
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摘要
An image pickup unit integrally includes an optical lowpass filter, a piezoelectric element, and an image pickup element. The optical lowpass filter is separated into a plurality of grouped optical members in an imaging light axis direction. The optical lowpass filter includes first to third grouped optical members. To remove a foreign substance, such as dust or dirt, deposited on the surface of the first grouped optical member, the piezoelectric element vibrates the first grouped optical member. The first grouped optical member has a monocrystalline structure having a Q value indicating the sharpness of resonance higher than that of glass, which is an amorphous material, and a low attenuation characteristic so as to efficiently vibrate the first grouped optical member.
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