초록 ▼

A distance detector capable of measuring the distance between the range detector and an object by directing a light emitted from a light emission element to the object and receiving the reflected light and advantageously adaptable particularly to small-sized cameras. The light reflected on the objec

A distance detector capable of measuring the distance between the range detector and an object by directing a light emitted from a light emission element to the object and receiving the reflected light and advantageously adaptable particularly to small-sized cameras. The light reflected on the object is received by a single light-receiving element. The reflected light is condensed by a condenser and concentrated on the light-receiving element. The light-receiving element comprises an element, for example a photopotentiometric element, varying in the electric output according to the position of the light spot of the reflected light. The output of the element in the form of electric signal continuously varies in proportion to the distance between the range detector and the object.

대표청구항 ▼

A distance detector for use with a camera having a movable photographing lens movable during a focusing operation to focus an image of an object to be photographed to an image plane, the distance detector comprising: a light emission element and an optical system both disposed on a first optical axi

A distance detector for use with a camera having a movable photographing lens movable during a focusing operation to focus an image of an object to be photographed to an image plane, the distance detector comprising: a light emission element and an optical system both disposed on a first optical axis for radiating an object to be photographed, a condensing optical system and a semiconductor position detector both disposed on a second optical axis which is separate from said first optical axis by a base length and parallel to said first optical axis, the semiconductor position detector comprising a photodiode operable to continually produce during the focusing operation a continuous electrical output signal proportional to the spot at which the light impinges thereon which is reflected by the object along the second optical axis, and a signal processing circuit connected to continuously receive the continuous electrical output signal from said semiconductor position detector and operative to develop therefrom during the focusing operation a continuous electrical object distance signal representative of the distance between the distance detector and the object.