| 摘要 |
PURPOSE:To allow one set of image pickup device to handle a larger visual field than that of an conventional image pickup device and plural visual fields by allowing plural photodetecting means to pick up an image of a different visual field in the title image pickup device. CONSTITUTION:Plural photodetecting means 5 are arranged radially around a rotary polygon mirror 1, each visual field has an angle of 360 deg./n, further an optical axis has a tilt theta to a rotating face 1b of the rotary polygon mirror 1 so as to prevent the photodetecting means 5 from shutting an incident luminous flux B made incident on the rotary polygon mirror 1. When the rotary polygon mirror 1 has eight reflecting faces 1a and the aperture of a lens system 4 of the means 5 is 20mmphi, the image pickup device has a visual field of 360 deg. in the direction of the rotating face 1b and has a visual field of nearly +10--50 deg. to the rotating face 1b, with a >=104mmphi of outer diameter of the rotary polygon mirror 1, n=8, theta=nearly 20 deg. and visual field b=nearly 60 deg..
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