摘要:
A schematic eye is used for the evaluation of the optical system of an optical coherence tomography apparatus which captures a tomogram of the fundus. The eye includes a first optical member which irradiated light from the optical system strikes and a second optical member which irradiated light from the first optical member strikes. A plurality of layers having different scattering intensities in the incident direction of irradiated light are formed on the second optical member.
摘要:
A schematic eye used for the evaluation of the optical system of an optical coherence tomography apparatus which captures a tomogram of the fundus includes the first optical member which irradiated light from the optical system strikes and the second optical member which irradiated light from the first optical member strikes. A plurality of layers having different scattering intensities in the incident direction of irradiated light are formed on the second optical member.
摘要:
Provided is a connection adapter that is capable of constituting an optical tomographic imaging apparatus having a small installation space and high use efficiency. A connection adapter is disposed between the fundus camera main body portion and a camera portion to be attached to the fundus camera main body portion for imaging a surface image of a fundus as an object in an optical tomographic imaging apparatus, and connects them in a detachable manner. The connection adapter includes: a first light guide unit for guiding tomographic image measuring beams guided from the fundus camera main body portion for imaging the tomographic image to a tomographic imaging portion; and a second light guide unit for guiding fundus image measuring beams guided from the fundus camera main body portion for imaging the surface image of the fundus to the camera portion.
摘要:
A connection adapter constituting an optical tomographic imaging apparatus has a small installation space and high use efficiency. The connection adapter is disposed between a fundus camera main body portion and a camera portion to be attached to the fundus camera main body portion for imaging a surface image of a fundus as an object in an optical tomographic imaging apparatus, and connects them in a detachable manner. The connection adapter includes: a first light guide unit for guiding tomographic image measuring beams guided from the fundus camera main body portion for imaging the tomographic image to a tomographic imaging portion; and a second light guide unit for guiding fundus image measuring beams guided from the fundus camera main body portion for imaging the surface image of the fundus to the camera portion.
摘要:
An ocular blood-flow meter includes an optical system for applying measuring light to a blood vessel of a subject eye, and for receiving light scattered by the blood vessel of the subject eye. A mechanism is provided for changing a direction in which the measuring light is applied and a direction in which the scattered light is received so as to enable a plurality of measurements in different directions. A controller performs the plurality of measurements in the different directions by using the optical system and the mechanism so as to obtain information concerning a blood flow. An output device provides a received-light signal obtained by the optical system or the information concerning the blood flow. An input device enables an operator to select a re-measurement operation in a desired direction from the different directions and to instruct the selected re-measurement operation.
摘要:
A Doppler velocimeter includes an illumination system for illuminating a blood vessel with a light beam, a detector for detecting Doppler-shifted scattered light produced from blood flowing in the blood vessel, and a processor for obtaining a blood flow velocity by analyzing a signal from said detector. The processor compares an actual power spectrum obtained by frequency-analyzing the signal with a theoretical power spectrum obtained using a frequency as a parameter while changing the parameter.
摘要:
A blood vessel tracking apparatus includes a light source for emitting light and illuminating a blood-vessel with the light. The apparatus also includes a light-receiving sensor for receiving a blood vessel image made of light from the illumination light source reflected by the blood-vessel. The apparatus also includes an optical-path changing device for changing the optical-path of the light emitted from the illumination light source and a calculator for calculating the blood-vessel diameter of the illuminated blood-vessel based on an output of the light-receiving sensor, a plurality of times. A measuring device is also provided, which measures the change in blood-vessel diameter based on the calculating performed by calculating device.
摘要:
An ophthalmological measurement apparatus for measuring bloodstream velocity in an fundus blood vessel in an eye to be measured including a measurement system for measuring the bloodstream velocity in the fundus blood vessel, an input block for inputting information relating to the fundus blood vessel as an object to be measured by the measurement system, and a control block for selecting the measurement conditions and computation conditions of the measurement system, based on the information input by the input block.
摘要:
A eye fundus examining apparatus includes a first optical system for projecting measurement light onto the fundus of an eye, a deflecting member provided in the first optical system for deflecting the measurement light, a light receiving element for receiving the reflected light of the measurement light from the fundus of the eye, a predetermined parameter of a target on the fundus of the eye being measured from the light reception information of the light receiving element, a second optical system for projecting a tracking light beam to an area including the target on the fundus of the eye, an image pickup element for receiving the image of the target illuminated by the tracking light beam, and a control system for driving the deflecting member and directing the measurement light onto the target so that the distance of deviation from the illuminated point by the measurement light under an ideal condition on the fundus of the eye to the target image received on the image pickup element may become a set value, the set value being suitably resettable.
摘要:
A tomographic-image pickup unit is controlled so as to capture a tomographic image in response to a signal input from a signal input unit. Then, a display unit is controlled so as to display the captured. tomographic image. An eyeground-image pickup unit is controlled so as to capture a two-dimensional image in response to a signal input from the signal input unit while the tomographic image. is displayed on the display unit. Therewith, the user can more easily perform imaging, and the time load on the subject is reduced.