Exchangeable lens which exchanges electrical signals with a came

Details Exchangeable lens which exchanges electrical signals with a came Exchangeable lens which exchanges electrical signals with a came

1985-11-19

1987-01-20

Griffin, Donald A.

35428912, G03B 1712

Patent

active

046377042

ABSTRACT:
An exchangeable lens to be mounted on a camera body by the rotation of the lens barrel is provided with a plurality of terminals arranged circularly along the circumference of the lens barrel about the optical axis of the lens barrel and are connected to a CMOS circuit in the lens. The terminals include a power supply terminal and a ground terminal through which electric power is supplied from the camera and a signal terminal through which a signal is transmitted between the camera body and the lens. The power supply terminal and the ground terminal are arranged to come into contact with their corresponding camera terminals in advance of the signal terminals when the lens is rotated to mount it on the camera body.

REFERENCES:
patent: 4357089 (1982-11-01), Okura et al.
patent: 4440484 (1984-04-01), Komoto et al.
patent: 4448509 (1984-05-01), Katsuma et al.
patent: 4457609 (1984-07-01), Tomino et al.
patent: 4464034 (1984-08-01), Tomino

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