LENS APPARATUS AND METHOD OF CONTROLLING OPERATION OF SAME

摘要

Notification is given of the fact that a television camera lens has developed a malfunction. An extender lens includes an imaging lens having a 1× magnification and an imaging lens having a 2× magnification. For each of these imaging lenses, a master lens is adjusted in such a manner that the light-receiving surface of an image sensor will be brought to an in-focus position. The master lens adjustment processing is executed periodically and data indicating a history of amounts of adjustment of the master lens is stored in memory per imaging lens. Data indicating the history of amounts of adjustment of the master lens is read from the memory. Whether the television camera lens is malfunctioning is detected from the read data indicating the history. If a malfunction is detected, an error LED emits light to notify of the malfunction.

主权项

1. A lens apparatus comprising:
an imaging optical system for forming the image of a subject on an imaging plane; an extender optical system capable of changing over among multiple imaging magnifications; a master optical system for adjusting in-focus position; a master optical system adjustment amount history memory for storing a history of amounts of adjustment of said master optical system obtained by adjusting the in-focus position by said master optical system per each of the multiple magnifications of said extender lens optical system; a malfunction detection unit for detecting whether or not there is a malfunction in the optical systems of the lens apparatus based upon multiple histories that have been stored in said master optical system adjustment amount history memory per each of the multiple magnifications of said extender lens optical system; and a malfunction notification unit for giving notification of a malfunction in response to detection of the malfunction by said malfunction detection unit.