초록 ▼

An automatic imaging lens focusing device comprises a detector for detecting a near focus state, a far focus state or an in-focus state of an imaging lens to an object and producing a corresponding signal, a driver for driving the imaging lens in accordance with the signal from the detector, a lens

An automatic imaging lens focusing device comprises a detector for detecting a near focus state, a far focus state or an in-focus state of an imaging lens to an object and producing a corresponding signal, a driver for driving the imaging lens in accordance with the signal from the detector, a lens position detector for detecting a position of the imaging lens, a memory for storing two lens positions detected by the lens position detection means in response to a store signal, a switch for producing the store signal and a control circuit for permitting the operation of the driver between the two lens positions stored in the memory while inhibiting the driver operation beyond the stored lens positions.

대표청구항 ▼

An automatic focusing device for an imaging lens, comprising: (a) focus state detection means for producing a signal representing a focus adjusting state of the imaging lens; (b) driving means for moving the imaging lens to an in-focus position on the basis of the adjusting state signal; (c) memory

An automatic focusing device for an imaging lens, comprising: (a) focus state detection means for producing a signal representing a focus adjusting state of the imaging lens; (b) driving means for moving the imaging lens to an in-focus position on the basis of the adjusting state signal; (c) memory means; (d) signal forming means for producing a memory signal, said memory signal being used for causing said memory means to store first in-focus position information and second in-focus position information, the first in-focus information being obtained from an output of said focus state detection means which corresponds to the object-position of a predetermined object, and the second in-focus state position information being obtained from an output of said focus state detection means which corresponds to another object-postion different from the object-position of the predetermined object; and (e) control means for permitting a lens moving operation of said driving means on the basis of the output of said focus state detection means, when the output is of a value between the outputs respectively corresponding to the first and second in-focus state position information.