Abstract: Disclosed is a light-projection device that is used for a range finding apparatus that computes a distance to an object that has reflected light, by measuring a time difference between a time when light is emitted and a time when reflected light is detected. The light-projection device comprises a light source array in which a plurality of light-emitting elements are two-dimensionally arranged and a light-projection lens that adjusts a light projection range of light emitted from the light source array. The light projection device further comprises a driving device that changes relative positions between the light source array and the light-projection lens and a light source control unit that switches on the light source array under conditions where the light source array is in different positions.

Abstract: Disclosed is a light-receiving device having a wide dynamic range. The light receiving device comprises a pixel array in which a first pixel provided with a first optical band pass filter and having a first sensitivity and a second pixel provided with a second optical band pass filter and having a second sensitivity that is lower than the first sensitivity are two-dimensionally arranged. A full width at half maximum of the second optical band pass filter is narrower than a full width at half maximum of the first optical band pass filter.

Abstract: A range finding apparatus uses a light-receiving device in which a first pixel having a first sensitivity and a second pixel having a second sensitivity that is lower than the first sensitivity are two-dimensionally arranged. The range finding apparatus measures time periods from a predetermined time until times when light is incident on each of the first pixel and the second pixel, and computes distance information for the first pixel and the second pixel based on the measured time periods. The measurement resolution used to measure the time period for the second pixel is lower than a measurement resolution used to measure the time period for the first pixel.

Abstract: Disclosed in a range finding apparatus that can efficiently perform range finding that uses light of different wavelengths. The range finding apparatus comprises a light source device capable of concurrently emitting light of a first wavelength and light of a second wavelength that is longer than the first wavelength and computes distance information based on a time period from when range finding is started until when incident of light on a pixel of a light receiving part is detected. In a pixel array of the light receiving part, a first pixel configured to receive light of the first wavelength and a second pixel configured to receive light of the second wavelength are two-dimensionally arranged.

Abstract: An ophthalmic apparatus is provided with an image capturing optical system and an image capturing apparatus, and optically examines an eye to be examined by performing focus detection using image capturing surface phase difference AF. A focus detection unit calculates data for a focus detection precision map from a defocus amount based on the phase difference detection. In a case in which the focus detection precision of a first subject is less than an established precision, a region determining unit determines a circle or concentric circle region that passes through the first subject, and determines a region that includes a second subject on the focus detection precision map included on the circle or inside of the concentric circle region, and that also has a focus detection precision that is higher than a predetermined precision. The focus detection unit then performs focus detection on the second subject.