| 摘要 |
The decentered optical system is configured by a first, a second and a third reflecting mirror disposed decentered, a focusing device, and a light receiver. The optical path is folded by the first, second, and third reflecting mirrors, aberration correction is carried out by a rotationally asymmetric reflecting surface, and an intermediate image is formed between the second and third reflecting mirrors and another reflecting mirror. The reflected light of the third reflecting mirror is made to form a substantially parallel light beam that forms an exit pupil. An image is formed on the light receiving surface by the focusing device. This decentered optical system is used in a light transmitting device, a light receiving device, and a light transmitting and receiving system, and carries out light tracking by detecting the position of the received light image.
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