摘要:
A propulsion system for a boat includes propellers rotated by an engine, a transmission mechanism arranged to transmit a driving force of the engine to the propellers in a state that the driving force of the engine is changed to at least one of a gear reduction ratio for low speed and a gear reduction ratio for high speed, and a control unit arranged to output a signal to control a gear shift in the transmission mechanism on the basis of a throttle valve opening of the engine and a speed of the engine and arranged to detect cavitation generated in conjunction with rotation of the propellers on the basis of a gear shift control map. The control unit is arranged to control the output of a signal to the transmission mechanism to change the high speed reduction gear ratio when cavitation is detected. The propulsion system achieves both acceleration and maximum speed at performance levels desired by an operator of a boat.
摘要:
An image forming device includes an image forming unit that forms an image including at least one of a user-requested image and a test image onto a recording medium, a controller that controls the image forming unit to form a test image including a mixed color on the recording medium, a transporting path that transports the recording medium on which the test image is formed by the image forming unit, an image detecting unit disposed at the transporting path that detects the test image formed on the recording medium, and a calibration unit that performs a color calibration process based upon the test image detected by the image detecting unit.
摘要:
A left parallax image and a right parallax image for a fundus of the same eye being examined are captured and recorded, and at least one of the two images is displayed. An image in a prescribed area is clipped from the displayed image, and an image in an area that corresponds to the area of the clipped image is clipped from the other image. The two clipped images are then enlarged and displayed on a stereo monitor in a left-right alignment. In such a configuration, when an area to be displayed at a high-magnification is specified for one of the images, clipping and high magnification processes may be performed also for the other image. This allows stereoscopic observations of an eye fundus at high magnification to readily be performed.
摘要:
A monocular image of a fundus of an eye under examination is captured via a photographic stop for monocular photography, and two stereographically viewed images are captured with a parallax via two photographic stops for stereographic photography that are decentered from a photographic optical axis. Defocused images are captured in the stereographic photography due to the deviation of the photographic stops from the optical axis. A corrective lens is inserted into the photographic optical path in order to correct the defocus in the stereographic photography. This makes it possible to readily correct defocus generated by deviation of the photographic stops from the photographic optical axis even when switching between monocular and stereographic photography modes.
摘要:
A grid formed with apertures of a predetermined shape is illuminated with light from a lamp and projected onto a tear meniscus accumulated on the lower eyelid. The aperture image projected on the tear film is imaged by a CCD camera. The tear meniscus functions as a concave mirror, so that the magnification factor depends on the radius of meniscus curvature. A processor calculates the magnitude of the grid image and evaluates the radius of meniscus curvature. Since the volume of lacrimal fluid varies depending upon the radius of meniscus curvature, the latter is used as a value representing the lacrimal fluid volume for dry eye diagnose purposes.
摘要:
An ophthalmological measuring apparatus has a display that displays a digital image of an imaged ocular fundus of a subject eye. A specifying device specifies an arbitrary point on the displayed digital image. An extracting device extracts from the displayed digital image an image region whose brightness value is higher than a brightness value of the specified arbitrary point.
摘要:
A photographic stop with two apertures is disposed at a position substantially conjugate to the anterior ocular segment of the eye being examined and at a position on the object-side focal surface of an image-forming lens. An eye fundus image is guided via a lattice barrier disposed on the image-side focal surface of the image-forming lens to an imaging CCD. The photographic stop, image-forming lens, lattice barrier and CCD are moved as a unit for focus adjustment. With such a configuration, the photographic stop is always positioned upon the object-side focal surface of the image-forming lens with the optical system kept telecentric even when the focus is adjusted to compensate for differences in diopter of the eye. This eliminates the phenomenon of a stereoscopic view that becomes more concave or convex the nearer to the periphery of the screen and provides good images of the fundus for stereoscopic viewing without any crosstalk of the left and right fundus images upon the image pickup surface.
摘要:
A grid formed with apertures of a predetermined shape is illuminated with light from a lamp and projected onto a tear meniscus accumulated on the lower eyelid. The aperture image projected on the tear film is imaged by a CCD camera. The tear meniscus functions as a concave mirror, so that the magnification factor depends on the radius of meniscus curvature. A processor calculates the magnitude of the grid image and evaluates the radius of meniscus curvature. Since the volume of lacrimal fluid varies depending upon the radius of meniscus curvature, the latter is used as a value representing the lacrimal fluid volume for dry eye diagnose purposes.
摘要:
Exciting light from a strobe light source is projected onto the fundus of the subject eye to excite a fluorescence substance in a subject eye fundus. Natural fluorescence exited in the fundus is received by a photodiode via a stop located at a position that is conjugate with the fundus. An XY stage is used to move the stop perpendicularly to the optical axis to change the measurement location. The output of the photodiode is used to calculate the intensity of the fluorescence from the measurement location. Since the measurement location can be changed with ease, it is possible to accurately and easily measure natural fluorescence from a desired part of the fundus.
摘要:
A left parallax image and a right parallax image for a fundus of the same eye being examined are captured and recorded, and at least one of the two images is displayed. An image in a prescribed area is clipped from the displayed image, and an image in an area that corresponds to the area of the clipped image is clipped from the other image. The two clipped images are then enlarged and displayed on a stereo monitor in a left-right alignment. In such a configuration, when an area to be displayed at a high-magnification is specified for one of the images, clipping and high magnification processes may be performed also for the other image. This allows stereoscopic observations of an eye fundus at high magnification to readily be performed.