Kabushiki Kaisha Topcon

Topcon Corporation

Takuya Moriyama

Nobuo Kochi

Hiroshi Ichiki

Akihiro Sugiyama

Yoko Hirohara

An image photographing device for three-dimensional measurement sequentially photographs a measuring object in an overlapping manner by a single camera. The image photographing device for three-dimensional measurement photographs the measuring object with marks having self-other identifiable identification codes, extracts the marks from a photographed image, identifies the identification codes of the marks, defines an area of the measuring object in the photographed image into photographed areas surrounded by the marks, counts a number of photographing times of each of the photographed areas which are involved in different photographed images, groups the photographed areas in response to the number of photographing times, inputs positions of the marks in a coordinate space of a photographing range image of the measuring object, connects the positions of the marks input in the photographing range image such that mark symbols of the marks surrounding the photographed areas correspond to each other to match the photographed areas into the photographing range image, and indicates the photographed areas matched into the photographing range image.

Image photographing device and method for three-dimensional measurement

To provide a color-coded target having a color code of colors chosen not to cause code reading errors and technique for automatically detecting and processing the targets. The color-coded target CTof this invention includes, on its surface: a position detecting pattern Pindicating a position to be measured; a reference color pattern Phaving a plurality of unit areas tinted in different colors for use as color references; and a color code pattern Phaving a plurality of unit areas tinted in different colors for discriminating the targets. The colors of the color code pattern Pare chosen so that adjacent colors in the HSI color space are different in at least one of hue, saturation, and intensity by a specified value or greater.

Color-coded target, color code extracting device, and three-dimensional measuring system

An eye characteristic measuring apparatus can effectively and properly measure and display wavefront aberration of an eye regardless of the eye state. A first illumination optical system (A) illuminates a small area on a retina of the eye by a first light flux from a first light source unit (). A first reception light optical system (A) leads a part of light flux reflected from the retina () to a first light reception unit () via a first conversion member () for converting the reflected light flux into at least 17 beams. A measurement data judgment unit, for example, judges whether the measurement data is appropriate for calculating the wavefront aberration according to a first signal from the first light reception unit (). For example, when the measurement data judgment unit judges that the measurement data is not appropriate, a first correction unit causes to display a check correction screen which will be detailed later and corrects the data into appropriate measurement data. Furthermore, according to the measurement data judged to be appropriate or the measurement data which has been corrected by the first correction unit (), a calculation unit calculates the wavefront aberration of the eye () as optical characteristic. Moreover, a measurement result judgement unit for example, judges whether the wavefront aberration calculated by the calculation unit is appropriate. Moreover, for example, when the measurement result judgment unit judges that the measurement result is not appropriate, a second correction unit () causes to display the check correction screen and correct the data into appropriate measurement data.

Eye characteristic measuring apparatus

A retinal disease analyzer processes data obtained by processing a color retinal image and measured visual field data provided by a perimeter to detect the condition of the optic disc and defects in the nerve fiber bundles for the clinical analysis of the condition of the optic disc and the defects in the nerve fiber bundles, and combines detected information on a fundus coordinate system taking into consideration the arrangement of the nerve fiber bundles for the comprehensive analysis of the condition and the degree of progress of glaucoma. The detected information is analyzed on the basis of the distribution pattern of the nerve fiber bundles or the corresponding fundus coordinate system to integrate all the data for analysis. The condition and the degree of progress of glaucoma can be determined on the basis of the integrated data.

Growing community of inventors

Tokyo, Japan

Takuya Moriyama