JP2007140305A5 - - Google Patents

Claims (6)

A focus detection unit that outputs a signal corresponding to the focus state of the imaging optical system;
A first state that includes a half mirror that reflects and transmits light, transmits a light beam from the photographing optical system to guide the light to the focus detection unit, and reflects the light beam from the photographing optical system to the focus detection unit; An optical path splitting optical system switchable to a second state of guiding;
Processing means for performing focus detection processing based on a signal from the focus detection unit;
The processing means performs focus detection processing using the spectral transmittance of the half mirror when the optical path splitting optical system is in the first state, and the half mirror when the optical path splitting optical system is in the second state. A focus detection process is performed using the spectral reflectance of the imaging device. The processing means corrects a focus detection result obtained based on a signal from the focus detection unit using a spectral transmittance of the half mirror when the optical path dividing optical system is in the first state, and the optical path The focus detection result obtained based on a signal from the focus detection unit is corrected using the spectral reflectance of the half mirror when the split optical system is in the second state. Imaging device. The imaging apparatus according to claim 1, wherein the processing unit performs a focus detection process using information on a color characteristic of a subject. The imaging apparatus includes an optical finder and an imaging element that photoelectrically converts a subject image,
The optical path splitting optical system guides a light beam from the photographing optical system to the focus detection unit and the optical viewfinder in the first state, and directs a light beam from the photographing optical system to the focus detection unit in the second state. The imaging apparatus according to claim 1, wherein the imaging apparatus is guided to the imaging element. An imaging device according to any one of claims 1 to 4,
An imaging system comprising: the imaging optical system; and a lens device that is detachably attached to the imaging device. A focus detection unit that outputs a signal according to a focus state of the photographing optical system, and a half state that reflects and transmits light, and transmits a light beam from the photographing optical system and guides it to the focus detection unit And a focus detection method in an imaging apparatus having an optical path splitting optical system capable of switching to a second state in which a light beam from the photographing optical system is reflected and guided to the focus detection unit,
When the optical path dividing optical system is in the first state, focus detection processing is performed using the spectral transmittance of the half mirror, and when the optical path dividing optical system is in the second state, the spectral reflectance of the half mirror is calculated. A focus detection method using the focus detection process.