Abstract: The present invention relates to an apparatus for precise measurement of optical characteristics, and has an object to provide an optical characteristic measuring apparatus comprising a position change unit for changing the positions of beams transformed by a first transforming member, wherein a first light source emits a luminous flux of a first wavelength, a first illumination optical system illuminates a minute area on the retina of the eye under examination with the luminous flux from the first light source, a first light receiving optical system leads light to a first light receiving unit through a transforming member for transforming the luminous flux having undergone at least one of transmission and reflection at at least one surface of the object of measurement into at least nine beams, a position change unit changes the positions of the beams transformed by the first transforming member, and an arithmetic unit can determine optical characteristics of the object of measurement based on a first signal

Abstract: A first signal and a second signal are captured at the same time, and the optical characteristics of a subject eye and the corneal shape thereof are measured simultaneously or substantially simultaneously. A calculation section captures a received light signal (first signal) from a first light receiving section and a received light signal (second signal) from a second light receiving section at the same timing or substantially the same timing, obtains the optical characteristics of the subject eye on the basis of the first signal, and obtains the corneal shape of the subject eye on the basis of the second signal. A measurement timing decision section decides, on the basis of the first and/or the second signal, measurement timings of the first signal and the second signal as objects for which a measurement calculation is carried out.

Abstract: The invention includes an eye characteristic measuring apparatus which achieves accurate measurement by taking a difference component with relation with measured data in a reference optical path when optical characteristics of an eye are measured. Specifically the measuring apparatus is provided with a reference optical system separate from a light receiving system. Measurement of eye characteristics can include both aberration of an eye and aberration in the measuring apparatus. In order to achieve high accuracy, the eye characteristic measuring apparatus of the invention substantially removes aberration in strain of the equipment produced after the initial stage and aberration of the equipment caused by deformation due to temperature.

Abstract: An anterior segment photographing apparatus comprises a slit light beam projecting system for projecting a slit light beam on an eye to be examined, an image forming optical system disposed right in front of the eye to be examined and capable of forming an image of a section of the anterior segment of the eye represented by the slit light beam reflected from the eye on a light receiving, a concave mirror having a concave reflecting surface in a shape of rotational symmetry with respect to the optical axis of the image forming optical system and capable of collecting and reflecting the reflected slit light beam reflected from the eye, and a reflecting mirror for reflecting the reflected light reflected from the concave mirror toward the image forming optical system.

Abstract: The present invention is intended to provide an eye characteristic measuring apparatus having a projection system for projecting a light source image of small amount onto a fundus of an eye by a reflected light from the fundus, and a wavefront detecting system for detecting a wavefront of luminous flux emitted from the interior of the pupil of the eye by a reflected light from the fundus, where the projection system projects a light source image of small amount onto a fundum of an eye, and the wavefront detection system detects the wavefront of luminous flux emitted from the interior of the fundum by a reflected light from the fundus, and a defledction prism having at least one transmission surface for aberration correction within both optical paths of the projecting system and the wavefront detecting system, can deflect the incident luminous flux.