Hamamatsu-Photonics K.k.

Naotoshi Hakamata

Haruyoshi Toyoda

Kazutaka Suzuki

Munenori Takumi

Yoshinori Matsui

An object is to simply and easily evaluate differences in behavior of the eyes of subjects. A binocular measurement systemincludes a photodetectorthat detects reflected light from the right eye Eand the left eye Eof a subject, and outputs image signal of the reflected light, a feature amount calculating unitthat calculates a feature amount corresponding to the right eye Eand a feature amount corresponding to the left eye Ebased on the image signal, and a comparison value calculating unitthat calculates, based on the two feature amounts, a comparison value obtained by comparing the two feature amounts.

Binocular measurement device, binocular measurement method, and binocular measurement program

A tablet terminalA is a measurement apparatus for measuring a subject's eyelid position, and includes a display sectionthat generates a vertically long light emitting region to make a reflection image form on a corneal surface of the subject's eyeball, a camerathat images the reflection image formed by the display section, and an arithmetic circuitthat derives reflection image information concerning a size or position of the reflection image based on image data of the reflection image obtained by the camera, and measures the eyelid position based on the reflection image information.

Measuring device and measuring method

An eyeblink measurement systemis a measurement apparatus for measuring a subject's eyelid position, and includes a lighting devicethat irradiates light extending across upper to lower eyelids of the subject's eye region E, and an image measurement devicethat has an optical axis Ia on a plane for which a plane including an irradiation optical axis La of the light is rotated by a predetermined angle &#x3b8; around an axis Aalong the light to be irradiated onto the subject, obtains height information based on the position of an optical image of the light in an image imaged, and measures the eyelid position based on the height information.

Measurement device and measurement method

A pupil measuring apparatus comprises a markplaced in a space where a background is observable from the two eyes E; a mark moving devicefor moving the markbetween the two eyes E and the background; an illumination optical systemfor illuminating the two eyes E from the background side; two cameras A, B for respectively imaging the two pupils PP; calculating meanstofor calculating areas or diameters of the respective pupils thus imaged, from video signals of the two cameras A, B; and a displayfor providing an output of a graph of change in the areas or diameters calculated against a position of the markor a time associated with the position on a single screen.

Pupil measuring apparatus

A pupil measuring apparatus includes a mark placed in a space where a background is observable by both eyes; a mark moving device for moving the mark between the eyes and the background; an illumination optical system for illuminating the eyes from the background side; two cameras for respectively imaging the pupils of the eyes; a calculating means for calculating areas or diameters of the respective pupils thus imaged, from video signals of the two cameras; and a display for providing an output of a graph showing change in the areas or diameters of the two pupils calculated against a position of the mark or a time associated with the position on a single screen.

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Hamamatsu, Japan

Naotoshi Hakamata