Three-dimensional retina image generator

摘要

Provided is a three-dimensional retina image generator that can detect, in a precise manner, the scanning position displacement during scanning of the retina with a simple configuration and, as a result, and can obtain a high-quality retinal image with a reduced influence of speckle noise therein. In order to detect the movement of retina R, the three-dimensional retina image generator has: second light source unit 210 that outputs a line beam to be imaged on retina R; positional displacement detector 220 that detects the line beam reflected from retina R and that detects the “displacement” of the scanning position during scanning of retina R; and dichroic mirror 230 that causes the line beam to propagate along the same light path as that of the object light scanning beam in inspection unit 140.

主权项

1. A three-dimensional retina image generator, comprising:
a first light source unit that has a first light source; a light divider that divides an output light beam output from the first light source into an object-scanning light beam that is delivered to a retina of an eye ball and a reference light beam for reference; a reference light beam unit, into which the reference light beam is input and that causes the input reference light beam to reflect as a reference reflection light beam; a measurement unit that scans the retina by the object-scanning light beam and that causes light scattered at the retina to reflect as an object-reflected light beam; an interference intensity detector that generates an interference light beam in which the reference reflection light beam and the object-reflected light beam are caused to interfere with each other and that detects an interference intensity for each wavelength in the generated interference light beam; a generator that generates a three-dimensional image of the retina based on the detected interference intensity for each wavelength; a second light source unit that has a second light source for outputting a line beam and that outputs the line beam in order to transmit the line beam in a path identical to that of the object-scanning light beam in the measurement unit; and a positional displacement detector that has a line sensor, that detects the line beam reflected from the retina and output from the measurement unit by the line sensor and that detects scanning position displacement during scanning of the retina by the object-scanning light beam based on the detected line beam, wherein the measurement unit includes:
a light control mechanism that adjusts scanning positions when the line beam and the object-scanning light beam scan the retina; anda controller that performs control of the light control mechanism, and wherein the controller controls the scanning positions when the line beam and the object-scanning light beam scan the retina in the light control mechanism, based on the detected scanning position displacement.