| 摘要 |
PROBLEM TO BE SOLVED: To facilitate removal of a pinhole lens, when replacing a lens of the pinhole camera. SOLUTION: A CCD 12 is placed on a board 10 and a holder 14 is fixed onto the board 10 by using screws which is not shown in the figure. A spiral groove 14a to mount a pinhole lens is formed on the upper outer side of the holder 14. The pinhole lens 16 is configured in such a way that a plate in which the pinhole lens is provided and a lens, e.g. an aspheric lens, are integrated, and the lower part of the pinhole lens 16 is formed cylindrically and a spiral groove 16a for mounting the holder 14 is formed on the inside of the pinhole lens 16. The pinhole lens 16 is screwed to the holder 14 using the spiral groove 16a of the pinhole lens 16 and the spiral groove 14a of the holder 14. By adopting this configuration, the pinhole lens 16 can easily be replaced by turning operation of the pinhole lens 16.
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