Focus detection device and distance measurement device

A focus detection device, comprising:

• light receiving sensors of which sensible wave length regions are different from each other and in which at least part of the sensible wave length regions overlap each other;
• a comparison circuit which compares output signals from the light receiving sensors;
• a selection circuit which selects the output from one of the light receiving sensors to be used for focus detection, depending on the comparison result;
• and
• a focus detection circuit which performs focus detection in accordance with the output of the selected light receiving sensor.

A focus detection device, comprising:

• light receiving sensors of which sensible wave length regions are different from each other and in which at least part of the sensible wave length regions overlap each other;
• a selection circuit which compares with each other correlation values for pupil-split images obtained from the outputs of the light receiving sensors or images with a parallax obtained from the outputs of the light receiving sensors to select a light receiving sensor of a higher correlation value;
• and
• a focus detection circuit which performs focus detection in accordance with the output of the selected light receiving sensor.

A distance measurement device, comprising:

• light receiving sensors of which sensible wave length regions are different from each other and in which at least part of the sensible wave length regions overlap each other;
• a distance measurement circuit which performs distance measurement based on the correlation among pupil-split images obtained from the output of any one of the light receiving sensors or among images with a parallax obtained from the output;
• and
• a determination circuit which determines whether the distance measurement result is appropriate,
• wherein if the determination circuit determines that the result is not appropriate, the distance measurement circuit performs distance measurement based on the output of another light receiving sensor of the light receiving sensors.

A distance measurement device, comprising:

• light receiving sensors of which sensible wave length regions are different from each other and in which at least part of the sensible wave length regions overlap each other;
• a comparison circuit which compares output signals from the light receiving sensors;
• a selection circuit which selects the output from one of the light receiving sensors to be used for distance measurement, depending on the comparison result;
• and
• a distance measurement circuit which performs distance measurement in accordance with the correlation among pupil-split images obtained from the output of the selected light receiving sensor or among images with a parallax obtained from the output.

A distance measurement device, comprising:

• light receiving sensors of which sensible wave length regions are different from each other and in which at least part of the sensible wave length regions overlap each other;
• a selection circuit which compares with each other correlation values for pupil-split images obtained from the outputs of the light receiving sensors or images with a parallax obtained from the outputs of the light receiving sensors to select a light receiving sensor of a higher correlation value;
• and
• a distance measurement circuit which performs distance measurement in accordance with the correlation among the pupil-split images obtained from the output of the selected light receiving sensor.

A focus detection device, comprising:

• light receiving sensors of which sensible wave length regions are different from each other and in which at least part of the sensible wave length rcgi ens overlap each other;
• a selection circuit which compares with each other correlation values for images with a parallax obtained from the outputs of the light receiving sensors to select a light receiving sensor of a higher correlation value;
• and
• a focus detection circuit which performs focus detection in accordance with the output of the selected light receiving sensor.

A distance measurement device, comprising:

• light receiving sensors of which sensible wave length regions are different from each other and in which at least part of the sensible wave length regions overlap each other;
• a distance measurement circuit which performs distance measurement based on the correlation among image with a parallax obtained from the output of any one of the light receiving sensors;
• and
• a determination circuit which determines whether the distance measurement result is appropriate,
• where in the determination circuit determines that the result is not appropriate, the distance measurement circuit performs distance measurement based on the output of another light receiving sensor of the light receiving sensors.

A distance measurement device, comprising:

• light receiving sensors of which sensible wave length region are different from each other and in which at least part of the sensible wave length regions overlap each other;
• a comparison circuit which compares output signals from the light receiving sensors;
• a selection circuit which selects the output from one of the light receiving sensors to be used for distance measurement, depending on the comparison result;
• and
• a distance measurement circuit which performs distance measurement in accordance with the correlation among images with a parallax obtained from the output of the selected light receiving sensor.

A distance measurement device, comprising:

• light having sensors of which sensible wave length regions an different from each other and in which at least part of the sensible wave length regions overlap each other;
• a selection circuit which compares with each other correlation values for images with a parallax obtained from the outputs of the light receiving sensors to select a light receiving sensor of a higher correlation value;
• and
• a distance measurement circuit which performs distance measurement in accordance with the correlation among the images with a parallax obtained from the output of the selected light receiving sensor.

A focus detection device, comprising:

• light receiving sensors of which sensible wave length regions are different from each other and in which at least part of the sensible wave length regions overlap each other.
• a focus detection circuit which performs focus detection based on an output of any one of said light receiving sensors;
• and
• a processing circuit which, in the case that the output of one of said light receiving sensors used by said detection circuit does not satisfy a preset value, causes said focus detection circuit to perform focus detection by using the output of another of said light receiving sensors.

A focus detection device, comprising:

• light receiving sensors of which sensible wave length regions are different from each other and in which at least part of the sensible wave length regions overlap each other;
• a processing circuit which compares output signals from said light receiving sensors and selects a light receiving sensor to be used for focus detection in accordance with the comparison result;
• and
• a focus detection circuit which performs focus detection in accordance with the output of the selected light receiving sensor.

A distance measurement device, comprising:

• light receiving sensors of which sensible wave length regions are different from each other and in which at least part of the sensible wave length regions overlap each other;
• a distance measurement circuit which performs distance measurement based on the correlation among pupil-split images obtained from the output of any one of said light receiving sensors;
• and
• a processing circuit which, in the case that the output of one of said light receiving sensors used by said distance measurement circuit does not satisfy a preset value, causes said distance measurement circuit to perform distance measurement by using the output of another of said light receiving sensors.

An image taking device, comprising:

• light receiving sensors of which sensible wave length regions are different from each other and in which at least part of the sensible wave length regions overlap each other;
• a focus detection circuit which performs focus detection based on an output of any one of said light receiving sensors;
• and
• a processing circuit which, in the case that the output of one said light receiving sensors used by said focus detection circuit does not satisfy a preset value, causes said focus detection circuit to perform focus detection by using the output of another of said light receiving sensors.

An image taking device, comprising:

• light receiving sensors of which sensible wave length regions are different from each other and in which at least part of the sensible wave length regions overlap each other;
• a processing circuit which compares output signals from said light receiving sensors and selects a light receiving sensor to be used for focus detection in accordance with the comparison result;
• and
• a focus on circuit which performs focus detection in accordance with the output of the selected light receiving sensor.

An image taking device, comprising:

• light receiving sensors of which sensible wave length regions are different from each other and in which at least part of the sensible wave length regions overlap each other;
• a selection circuit which compares with each other correlation values for pupil-split images obtained from the outputs of said light receiving sensors to select a light receiving sensor of a higher correlation value;
• and
• a focus detection circuit which performs focus detection in accordance with the output of the selected light receiving sensor.

An image taking device, comprising:

• light receiving sensors of which sensible wave length regions are different from each other and in which at least part of the sensible wave length regions overlap each other;
• a distance measurement circuit which performs distance measurement based on the correlation among pupil-split images obtained from the output of any one of said light receiving sensors;
• and
• a processing circuit which, in the case that the output of one of said light receiving sensors used by said distance measurement circuit does not satisfy a preset value, causes said distance measurement circuit to perform distance measurement by using the output of another of said light receiving sensors.

An image taking device, comprising:

• light receiving sensors of which sensible wave length regions are different from each other and in which at least part of the sensible wave length regions overlap each other;
• a selection circuit which compares with each other correlation values for pupil-split images obtained from the outputs of said light receiving sensors to select a light receiving sensor of a higher correlation value;
• and
• a distance measurement circuit which performs distance measurement in accordance with the correlation among the pupil-split images obtained from the output of the selected light receiving sensor.

A distance measurement device, comprising:

• light receiving sensors of which sensible wave length regions are different from each other and in which at least part of the sensible wave length regions overlap each other;
• a distance measurement circuit which performs distance measurement based on the correlation among images with a parallax obtained from the output;
• and
• a processing circuit which, in the case that the output of one of said light receiving sensors used by said distance measurement circuit does not satisfy a preset value, cause said distance measurement circuit to perform distance measurement by using the output of another of said light receiving sensors.

An image taking device, comprising:

• light receiving sensor of which sensible wave length regions are different form each other and in which at least part of the sensible wave length regions overlap each other;
• a distance measurement circuit which performs distance measurement based on the correlation among image with a parallax obtained from the output;
• and
• a processing circuit which, in the case that the output of one of said light receiving sensors used by said distance measurement circuit does not satisfy a preset value, causes said distance measurement circuit to perform distance measurement by using the output of another of said light receiving sensors.