摘要:
A laser surveying instrument comprises a light source unit (2) which has two or more light emission sources (8a,8b) for emitting pulsed distance measuring lights (10a,10b) with different wavelengths, a pulse driving unit (9) for performing time sharing and emitting the pulsed distance measuring lights for every wavelength, a light projecting unit (3) for projecting the pulsed distance measuring lights with the two or more wavelengths on an optical axis (13), a deflection member (11) which is provided on the optical axis, has two or more reflection surfaces which reflect each wavelength of the pulsed distance measuring lights alone, divides the pulsed distance measuring lights for every wavelength, and deflects each of the distance measuring lights to direct an object to be measured, and a single photodetection element (12) for receiving reflected distance measuring lights from the object to be measured, and in the laser surveying instrument, a measurement of distance is performed for every pulsed distance measuring light based on a photodetection signal (24) produced by the photodetection element.
摘要:
An optical imaging method in an embodiment includes: a scanning step to scan each of a plurality of A-lines of an object with a signal light while alternately changing the phase difference between the signal light and a reference light to two preset phase differences; a detection step to detect the interference light of the signal light passing through the A-line and the reference light; and an imaging step to generate a complex interference spectrum based on the detection results of the interference lights corresponding to the plurality of A-lines sequentially obtained in the detection step according to the scanning, and form, based on the complex interference spectrum, the tomographic image along the arrangement of the plurality of A-lines in which a complex conjugate artifact is substantially removed.
摘要:
A laser surveying system comprises a leveling unit (3) having a motor for leveling, a light source unit (14) for emitting a laser beam, a light projecting optical system installed on the leveling unit and for projecting the laser beam, a power supply unit for supplying electric power to each of component sites, a control unit (7) for driving and controlling each of the component sites, a storage unit (26), a tilt detecting means (11) installed on the leveling unit and used for detecting leveling conditions, a rotation number detecting means (13) for detecting number of rotations of the motor, a light source detecting means (16a and 16b) for detecting light emitting condition of the light source unit, a voltage detecting means (24) for detecting output voltage of the power source unit, and an abnormality detecting means for detecting operational abnormality, and in the laser surveying system, the control unit monitors whether there is abnormality or not by the abnormality detecting means, samples a detection signal from each of the detecting means at a predetermined time interval, and stores signal groups thus detected in the storage unit in time series as sampling data, and when the stored sampling data exceeds a predetermined amount, older data are deleted, and new sampling data are sequentially overwritten, and when at least one of the detection signals for monitoring indicates abnormality, using a point to indicate the abnormality as a base point, the sampling data in a range of a predetermined time period are exempted from the objects of deletion and are preserved as data for analysis of the cause of abnormality.
摘要:
A target set in a to-be-measured object and used for acquiring a reference value of point-cloud data, the target includes a small circle surrounded by a frame and having the center of the target, a large circle surrounded by the frame and disposed concentrically with the small circle so as to surround the small circle, a low-luminance reflective region located between the frame and the large circle and having the lowest reflectivity, a high-luminance reflective region located between the large circle and the small circle and having the highest reflectivity, and an intermediate-luminance reflective region located inside the small circle and having an intermediate reflectivity which is higher than the reflectivity of time low-luminance reflective region and which is lower than the reflectivity of the high-luminance reflective region.
摘要:
An ophthalmologic imaging device can shoot a diagnostically important area from the macula to the optic papilla in a wide angle of view without flares without trouble by a single imaging operation. An optical illumination system (25) includes a cornea aperture (34), an iris aperture (35), and a lens aperture (36) conjugate to the cornea (C) of the subject eye (E), the iris of the subject eye (E), and the posterior surface of the lens, respectively, and an split mark projection system (41) for focusing on the fundus (Ef) of the subject eye (E). A light source (37) is controlled by a controller to emit light for being able to obtain at least two consecutive fundus images. An inner aperture image (q3') corresponding to the lens aperture (36) is projected on the posterior surface of the lens. The controller (23) controls the lens aperture (36) so that for obtaining a second fundus image, the inner aperture image (q3') is projected at a position shifted relative to the optical axis of an optical observatory or imaging system (27, 26) from a position at which the aperture image is projected for obtaining a first fundus image.
摘要:
The invention provides the measuring method for performing monitoring measurement on a plurality of measuring points by using a measuring instrument 1, which comprises a telescope unit for performing sighting of a measuring point where an initial value is already known, a distance measuring unit 29 for measuring a distance to the measuring point by projecting a distance measuring light through the telescope unit, an image sensor 23 for taking an image in direction of measurement and for acquiring a digital image, angle detecting units 31, 32 each for detecting a directional angle in sighting direction of the telescope unit, and an arithmetic unit 27 for making the telescope unit perform automatic sighting to the measuring point and for calculating directional angles of the measuring point based on a deviation of the measuring point on the digital image from a sighting axis and based on a result of detection from the angle detecting unit, wherein the monitoring measurement comprises a coarse monitoring measurement for acquiring a digital image in measuring direction and for performing angle measurement on the measuring point from the digital image, and a precise monitoring measurement for performing sighting of the measuring point by the telescope unit and for performing distance measurement by the distance measuring unit and angle measurement by the angle detecting unit, and wherein the coarse monitoring measurement is executed on each of the measuring points, a deviation of a result of the coarse measurement by the coarse monitoring measurement from the initial value is determined, and the precise monitoring measurement is executed on the measuring point where the deviation exceeds a first threshold value.
摘要:
A fundus observation apparatus according to an embodiment comprises: a photographing part that photographs the fundus of a subject eye; a forming part comprising an optical system that irradiates signal light onto the fundus and interferes reflected light of the signal light from the fundus with reference light via a reference path and detects the resulting interference light, wherein the forming part forms a tomographic image of the fundus based on the detection result; and an analyzing part that analyzes a photographed image of the fundus from the photographing part to delete predetermined low-frequency components from the photographed image.
摘要:
According to an embodiment, an attachment is attached to a main body part and has multiple bright points arranged in a ring. A calculation part calculates a first astigmatic axis angle based on an image obtained by using an imaging optical system to photograph the patient's eye while the multiple bright points are projected thereto. A storage stores the calculated first astigmatic axis angle and/or a second astigmatic axis angle measured before surgery. A mechanism changes the orientation of the main body part. A first input part inputs orientation information indicating the orientation of the main body part. A correction part corrects the first astigmatic axis angle and/or the second astigmatic axis angle based on the input orientation information. A display part displays the corrected first astigmatic axis angle and/or the corrected second astigmatic axis angle.