Abstract: A fundus image-taking and recording apparatus emits an appropriate amount of light at the time of taking an image by determining an appropriate light exposure from the amount of observation light during observation. In particular, even when the brightness varies during fluorescence image-taking, the fundus image-taking apparatus can provide an image having adequate brightness by measuring the sensitivity of a television camera for observation to thereby determine an appropriate amount of image-taking light.

Abstract: An object of the invention is to precisely guide the position of an eye in order to acquire an excellent eye image which is suitable for an authentication.

Abstract: The present invention provides an iris imaging apparatus is configured of a platform; a wide angle camera for imaging an image of a person to be authenticated; wide angle camera lighting devices controlled to emit light when the wide angle camera shoots; a telephoto camera for imaging the enlarged image of the eye of the person to be authenticated; iris lighting devices controlled to emit light when the telephoto camera shoots; first motors for rotating the iris lighting devices and directing the luminous light in the direction of the person to be authenticated; a turning stage mounted with the wide angle camera, the wide angle camera lighting devices, the telephoto camera, the iris lighting devices and the first motors, the turning stage rotatablly mounted on the platform; and a second motor for turning the turning stage. All the components required for the turning operation are mounted on the turning stage.

Abstract: A computer-implemented method and system for equalizing the brightness, contrast and color of two or more images (206, 208) of an eye fundus (106). Because left and right images (206, 208) are taken from different camera (104) positions, or because two images (206, 208) have been taken at different times, the resulting images (206, 208) have different brightness, contrast and color. Groups (306, 308) are formed from the pixels making up the images (206, 208). The groups can be straight lines oriented perpendicularly to the direction of camera (104) motion. The intensity of each pixel in a group is measured, and the group's mean and variance are then calculated. The intensity of the groups are then adjusted in order that a group (306) from the left image (206) will have the same mean intensity and variance as the corresponding group (308) from the right image (208). The measurements and adjustments can be made for each of the red, green and blue intensities of each pixel.

Abstract: A fundus camera comprising TV relay lens unit (27) and a body unit (1) which is capable of mounting plurality of TV cameras (30, 31) and (32) is provided. The body unit (1) includes photographing optical system (3) for photographing a fundus Fu to be observed. The TV relay lens unit (27) is detachably mountable on the body unit (1) and has a function to direct a fundus image forming luminous flux divided by the photographing optical system (3) to respective TV camera according to light. The TV relay lens unit (27) comprises a switching mirror (37) and a reflecting optical element (38) so as to adapt to TV cameras of a visible-fluorescent photographing/infrared-fluorescent photographing TV camera (30) which has sensitivity for both visible light and infrared light, a color photographing TV camera (31), which has sensitivity for visible light and a fundus observing TV camera (32) which has sensitivity for infrared light.

Abstract: An iris authentication apparatus performs authentication based on data generated from a human iris in which camera section and a signal processing section detect an iris state in the form of data. By using a database section, an iris data processing section detects whether the iris state is in a living body state. When the iris data processing section has detected that the iris state is in a living body state, it is judged that the detected data is effective. In this manner, the iris authentication apparatus can reliably prevent a third person from being authenticated by pretending to be a registered person by forging an iris pattern that is a non-living-body iris.

Abstract: A fundus camera capable of guiding accurately a sight line using an internal fixation target light source while an apparatus constitution is simplified. The fundus camera is provided with an illumination optical system for illuminating the fundus with visible illumination light for photographing and with invisible illumination light for observation, a photographing optical system for picking up an image of the fundus with visible reflection light from the fundus including a first image-pickup element, an observation optical system for picking up the image of the fundus with invisible reflection light from the fundus including a wavelength-selecting mirror and a second image-pickup element, a fixation target projection optical system for fixating an eye including alight-dividing member and a fixation target light source, and a wavelength-selecting filter. In the fundus camera, the visible fixation target light is guided to the eye and photo-received on the second image-pickup element.

Abstract: An imaging apparatus which can be used to capture high-quality iris images for identification of a person. The iris imager comprises a camera, a cold mirror, a lens, an illuminator, and a focus assessment processor. The imager has sensors and indicators which assist a user in aligning and focusing the device. The imager also automatically captures the image when proper positioning is achieved. The focus assessment processor accesses the image and applies certain measurement routines to assess the focus. The output of the focus assessment processor is used to control an indicator. A template representative of the iris features is extracted and then compared to a database of previously stored templates to identify the person.

Abstract: An ophthalmic photographing apparatus capable of photographing a fundus and a slit-sectioned anterior segment of an eye in non-mydriatic conditions. The apparatus is provided with a light source unit including an infrared light source optical system for observation and a visible light source optical system for photographing, a hand-held photographing unit including a first illumination optical system with an illumination lens, and an observation/photographing optical system with an objective lens, and being separated from the light source unit, a slit light illumination unit including a second illumination optical system with a slit plate and an illumination lens, and being removably attached to the photographing unit, and a photoconductive tube connecting the light source unit to the photographing or illumination unit and transmitting infrared light for observation and visible light for photographing from the light source unit to the first or second illumination optical system.

Abstract: A computer-implemented method and system for adjustment and matching of stereoscopic images (206, 208) of the eye fundus (106). Illumination errors between the images are eliminated, such as by adjusting groups of pixels so that the mean and variance of a group (306) from the left image (206) will have the same mean intensity and variance as the corresponding group (308) from the right image (208). An epipolar line adjustment is performed, such as by shifting points in the images based on matched points in the images. Image occlusion errors are detected and removed, such as by matching point analysis. Once these adjustment steps have been completed, a matching analysis can be preformed using the corrected images.

Abstract: A fundus camera for photographing a fundus of an eye to be examined in which color adjustments are easily made to display an image in desired colors. The fundus camera is provided with: a photographing optical system having a photographing element for photoelectrically photographing the fundus; a monitor which displays an image of the photographed fundus illuminated in illumination light from an illumination light source for photographing; a color adjustment data input unit which inputs color adjustment data for making a color adjustment to the image to be displayed on the monitor; a color adjustment unit which makes the color adjustment to the image based on the inputted color adjustment data; and a storage unit which stores data about the image associated with data about its colors.

Abstract: A fundus camera for photographing a fundus of an eye to be examined, in which a fixation target may be moved easily to guide a desired section of the fundus to a position intended for photographing. The fundus camera is provided with: observation means having a photographing element for picking up an image of the fundus illuminated in illumination light for observation and a monitor on which the picked-up image of the fundus is displayed; fixation target presenting means for movably presenting a fixation target in an arbitrary position, the fixation target being visually identified by the eye; designating means for designating a section of the fundus desired to be placed in the position intended for photographing on the fundus image displayed on the monitor; and control means for controlling the fixation target presenting means so as to shift a presenting position of the fixation target based on a signal indicating a designated position on the monitor.

Abstract: A retinal blood flow measuring apparatus has an irradiation system for spot-applying a laser beam for measurement onto a blood flow in the fundus of an eye to be examined, a light receiving device for receiving the reflected light of the laser beam for measurement from the fundus of the eye, the blood flow state of the fundus of the eye being measured from the light reception signal of the light receiving device, and a prescribing member for prescribing the position of the reflected light from the fundus of the eye in the direction of depth of the fundus of the eye.

Abstract: An iris pickup apparatus includes: a wide-angle camera for picking up the image of a photographic object, a telephotograph camera for picking up the enlarged image of an iris of a photographic object by focusing the lens of the camera on the iris of the photographic object, a panning mechanism for panning the telephotograph camera, and a tilt mechanism for pivotally tilting the wide-angle camera and the telephotograph camera. The wide-angle camera and the telephotograph camera are arranged so that their optical axes cross each other at right angles. The tilt mechanism operates to pivotally tilt the wide-angle camera and the telephotograph camera on the same plane as the optical axis plane.

Abstract: An image-input device includes a camera for capturing an iris pattern, and a personal computer for displaying the captured iris image. The computer has software for registering iris data and for comparing iris data. A half mirror is connected to the camera. The camera is mounted to the display of the computer. The half mirror, which transmits a visible light element and reflects near infrared light, is disposed in front of the display when the camera is connected to the computer. The iris of a user is captured by the camera while the user watches the display of the computer through the half mirror.

Abstract: A fundus camera according to the present invention is capable of facilitating observation, color photographing and fluorescent photographing without complicating operations and components of the device. The fundus camera is provided with a first illumination optical system for illuminating a fundus of an eye to be examined with infrared light for observation, a second illumination optical system for illuminating the fundus of the eye with visible light for photographing, a photographing optical system for photographing an image of the fundus with visible reflection light,from the fundus, and an observation optical system for observing the fundus in the infrared reflection light from the fundus. The observation optical system includes an optical path shared with the photographing optical system and an optical path branched from the optical path of the photographing optical system by a first wavelength-selecting mirror.

Abstract: A fundus camera according to the present invention is capable of facilitating observation, color photographing and fluorescent photographing without complicating operations and components of the device. The fundus camera is provided with a first illumination optical system for illuminating a fundus of an eye to be examined with infrared light for observation, a second illumination optical system for illuminating the fundus of the eye with visible light for photographing, a photographing optical system for photographing an image of the fundus with visible reflection light from the fundus, and an observation optical system for observing the fundus in the infrared reflection light from the fundus. The observation optical system includes an optical path shared with the photographing optical system and an optical path branched from the optical path of the photographing optical system by a first wavelength-selecting mirror.

Abstract: A fundus camera includes a main unit equipped with an illuminating optical system for illuminating the fundus of an eye to be inspected and a photographing optical system for photographing the fundus, an observation optical system for determining whether or not the distance between the main unit and the eye is equal to a proper working distance, an alignment index projecting system, and a driving mechanism for moving a light guide along an optical axis to change a working distance in the case of photographing the central part of the fundus and in the case of photographing a peripheral part of the fundus.

Abstract: An iris pickup apparatus includes: a wide-angle camera for picking up the image of a photographic object, a telephotograph camera for picking up the enlarged image of an iris of a photographic object by focusing the lens of the camera on the iris of the photographic object, a panning mechanism for panning the telephotograph camera, and a tilt mechanism for pivotally tilting the wide-angle camera and the telephotograph camera. The wide-angle camera and the telephotograph camera are arranged so that their optical axes cross each other at right angles. The tilt mechanism operates to pivotally tilt the wide-angle camera and the telephotograph camera on the same plane as the optical axis plane.

Abstract: An eye image pickup device includes an object lens; an image pickup element, such as a CCD serving as an image pickup unit; a light shielding portion; and a light guide unit. The light shielding portion shielding one part of the pickup light path is coaxially positioned along a light axis of an optical image pickup system. The light guide unit guides visible light on the route of the guide light path leading to the object lens. A cross section of the guided visible light is similar to that of the light shielding portion, and the center of the visible light is coincident with the light axis. The cross-sectional area of the visible light is set substantially equal to or slightly larger than the effective cross sectional area of the light shielding portion with respect to the optical image pickup system along the light path.

Abstract: A fundus photographing device for conducting infrared fluorescence photography on a fundus of an examinee's eye after intravenously injecting a fluorescent agent which emits fluorescence of an infrared region into veins is disclosed. This device includes an illumination optical system 1 for illuminating the fundus with exciting light, thereby exciting the injected fluorescent agent, the exciting light being of wavelengths in a wavelength region of not maximum absorption but maximum fluorescent intensity of the fluorescent agent.

Abstract: An eye fundus camera includes mainly an illumination optical system, a photography optical system, a photography switch, a controller, and a display. The photography optical system includes a first filter and a second filter. The first filter exhibits a spectral characteristic of intercepting light of wavelengths falling within the first wavelength band and transmitting light of wavelengths falling within a second wavelength band of longer wavelengths than the first wavelength band. The second filter exhibits a spectral characteristic of transmitting light of wavelengths falling within a wavelength band which covers the second wavelength band and includes part of the first wavelength band and which is therefore wider than the second wavelength band including the wavelengths of the light transmitted by the first filter. At least the first filter can be inserted into an optical path and displaced therefrom.

Abstract: A fundus camera includes a main unit equipped with an illuminating optical system for illuminating the fundus of an eye to be inspected and a photographing optical system for photographing the fundus, an observation optical system for determining whether or not the distance between the main unit and the eye is equal to a proper working distance, an alignment index projecting system, and a driving mechanism for moving a light guide along an optical axis to change a working distance in the case of photographing the central part of the fundus and in the case of photographing a peripheral part of the fundus.

Abstract: A fundus camera for photographing a fundus of an eye to be examined, in which a fixation target may be moved easily to guide a desired section of the fundus to a position intended for photographing. The fundus camera is provided with: observation means having a photographing element for picking up an image of the fundus illuminated in illumination light for observation and a monitor on which the picked-up image of the fundus is displayed; fixation target presenting means for movably presenting a fixation target in an arbitrary position, the fixation target being visually identified by the eye; designating means for designating a section of the fundus desired to be placed in the position intended for photographing on the fundus image displayed on the monitor; and control means for controlling the fixation target presenting means so as to shift a presenting position of the fixation target based on a signal indicating a designated position on the monitor.

Abstract: A fundus camera includes a main unit equipped with an illuminating optical system for illuminating the fundus of an eye to be inspected and a photographing optical system for photographing the fundus, an observation optical system for determining whether or not the distance between the main unit and the eye is equal to a proper working distance, an alignment index projecting system, and a driving mechanism for moving a light guide along an optical axis to change a working distance in the case of photographing the central part of the fundus and in the case of photographing a peripheral part of the fundus.

Abstract: A fundus camera for photographing a fundus of an eye to be examined in which color adjustments are easily made to display an image in desired colors. The fundus camera is provided with: a photographing optical system having a photographing element for photoelectrically photographing the fundus; a monitor which displays an image of the photographed fundus illuminated in illumination light from an illumination light source for photographing; a color adjustment data input unit which inputs color adjustment data for making a color adjustment to the image to be displayed on the monitor; a color adjustment unit which makes the color adjustment to the image based on the inputted color adjustment data; and a storage unit which stores data about the image associated with data about its colors.

Abstract: In a camera provided with image-pickup elements for receiving light to form an image of a subject, for converting the light into electric signals and for producing image information of the image of the subject by the electric signals; there are further provided a print information producing device to produce print information for printing the image information; and a transmitor to transmit the image information and the print information.

Abstract: A fundus camera being capable of moving a fixation target surely and precisely to a position intended for photographing with an adequate degree of freedom for moving the fixation target. The fundus camera is provided with an observation optical system having an objective lens and a photographing element for photographing a fundus illuminated with illumination light, a monitor on which an image of the photographed fundus is displayed, a fixation-target presenting optical system for presenting a fixation target via the objective lens, a fixation-target moving unit by which a position to present the fixation target is shifted to a desired position, a first display-control unit by which the position of the fixation target is superposed on the fundus image to be displayed on the monitor, and a second display-control unit by which a guide target for moving the fixation target is displayed in a predetermined position on the monitor.

Abstract: An iris camera module includes an image pickup optical system and a target optical system and the optical path is divided by a half mirror. An image of an iris is picked up by an image pickup element of an image pickup section. The iris image thus picked up is compared with a reference iris image stored in a storage in advance and the comparison result is output. The iris camera module has a configuration fit for a compact design. The reference iris image as a reference for comparison is stored in the storage of the comparison chip. It is thus difficult to falsify the reference iris image thereby providing a high security.

Abstract: A personal identification apparatus for providing information characteristic of an eye includes a housing with an entrance window through which a user looks at a target object. An image capture device within the housing operates to provide an image signed representing features of the eye and responsive to non-visible light reflected from the eye. In addition to the illumination source for the non-visible light reflected from the eye the apparatus also includes an optical element substantially transparent to the non-visible light and which has a first region less transparent to visible light from the target object than a second region. The arrangement of the apparatus is such that the image capture device views the eye through the second region of the optical element and the eye views the target object through the first region of the optical element.

Abstract: A retinal camera has an illuminating system for applying illuminating light to the fundus of an eye to be examined, a photographing system for photographing the fundus of the eye, the photographing system having a focusing lens, a projection system for projecting a focus detecting light beam onto the fundus of the eye by a fixed optical system, and a light position sensor for receiving the reflected light of the focus detecting light beam from the fundus of the eye through the focusing lens, the focus state of the photographing system being detected by the deviation of the light beam received by the light position sensor from a predetermined position.

Abstract: A fundus photographing device for conducting infrared fluorescence photography on a fundus of an examines's eye after intravenously injecting a fluorescent agent which emits fluorescence of an infrared region into veins is disclosed. This device includes an illumination optical system 1 for illuminating the fundus with exciting light, thereby exciting the injected fluorescent agent, the exciting light being of wavelengths in a wavelength region of not maximum absorption but maximum fluorescent intensity of the fluorescent agent.

Abstract: A synchronizer is provided to establish a mechanical switching interface between an electronic digital color camera and a fundus camera for appropriately coordinating the complete opening of the color camera shutter with the energization of fundus camera flash unit, and for fully disconnecting the flash unit at the completion of an image capture sequence thereby enabling resetting of the flash unit.

Abstract: A reliable method and apparatus for illuminating and imaging eyes uses multiple light sources producing multiple images of a subject each created under illumination by different illuminators. A composite image of the subject is formed by selecting pixels based upon their gray scale values or using pyramid image processing. A composite image can be created which is free of bright spots commonly caused by reflection of illumination from eyeglasses that may be worn by a subject or for which is free of dark shadows or which is free of both bright spots and dark shadows.

Abstract: An eye imagining apparatus where, in the case of a stereoscopic image, a beam from a left stop of a stereoscope stop and a beam from a right stop of the stereoscopic stop form an eye fundus image on a surface of a cylindrical lens array. These beams also reach adjacent image pickup device elements of an image pickup device of an image pickup unit, respectively. With the cylindrical lens array having the pitch width corresponding to two image pickup device elements, the focal length is determined so that an image of the stereoscope stop is focused in the pitch width, and the imaging plane of the cylindrical lens array is focused on the image pickup device by relay lens apparatus. On the other hand, with a monocular image, a single stop plate is put in the optical path instead of the stereoscope stop and the cylindrical lens array is retracted from the optical path, whereby the image is photographed with a higher horizontal image definition.

Abstract: In a red-eye detection/retouch apparatus, a first area extraction unit receives an image including a red eye and a signal representing a small area including the red eye and designated by a user and extracts a first area including the red eye. A first pixel selection unit detects the reddest pixel from the first area and outputs coordinate values and color information of the pixel. A determination unit determines whether the other red eye is present on the basis of the signal representing the small area and the coordinate values of the reddest pixel. The determination unit outputs an instruction signal for extracting a second area where the other red eye is present upon determining that the other red eye is present. A second area extraction unit receives the instruction signal and extracts the second area from the first area. A second pixel selection unit detects the reddest pixel from the second area and outputs coordinate values and color information of the pixel.

Abstract: An eye ball detecting device includes a light-receiving unit on which a plurality of regions each including of a plurality of pixels are set, and which receives a reflected image from an eye ball of a user or a person to be examined, Furthermore, the device includes a determination unit for determining the approach of the eye ball of the user to the device when the output from the light-receiving unit satisfies a predetermined condition. The light-receiving unit outputs only one luminance value for each region.

Abstract: An eyeball observing device comprising an illuminating optical system for illuminating a portin to be examined; a photographing optical system comprising an object lens group equipped with a transparent body which is designed to be in contact with the eyeball and an imaging lens group, the system allowing the image beams coming from the portion to be examined to reach an imaging surface; and a motion picture camera, wherein an ultrasonic oscillator for detecting the position of the examined eye is mounted on the transparent body. The device can provide a clear image of a desired portion of an eyeball quickly.

Abstract: A method for displaying a photographing point of a cornea which is used in an apparatus for obtaining video images of corneal cells.

Abstract: An eye fundus photographing apparatus has an illumination system for illuminating an eye fundus under test by an illumination light beam, a photographing system for photographing the eye fundus under test by a photographing light beam from the eye fundus under test illuminated by the illumination system, and a light shielding member arranged at a vicinity of the illumination diaphragm or the photographing diaphragm or at a vicinity of a conjugate position of the diaphragms, wherein it is an object of the present invention to provide an eye fundus photographing apparatus which enables eye fundus photographing to be in a good condition to an eye under test having a small pupil diameter.

Abstract: A fundus camera which may maintain sufficient working distance to an eye to be examined, providing a first illumination optical system for illuminating an eye to be examined by using infrared light, a second illumination optical system for illuminating the eye to be examined by using visible light for photo-imaging with part of light path being shared with that of the first illumination optical system an alignment index projection optical system for projecting an alignment index for the adjustment of working distance onto an cornea of the eye to be examined, an observation optical system having photoelectric imaging elements for observing the images of the focusing of the alignment index image and the fundus of the eye to be examined, a first display device for displaying images formed by the photoelectric imaging elements of the observation optical system, a photographing optical system having photoelectric imaging elements for forming images of the fundus of the eye to be examined with part of light path be

Abstract: An ophthalmological imaging apparatus includes a main body portion, an internal power source and an external power source. The main body portion has a light source producing light for imaging the eye to be examined. The internal power source is provided in the main body portion and supplies electrical energy to the light source for the production of the light. The external power source is provided discretely from the main body portion and supplies from outside of the main body portion electrical energy to the light source corresponding to the deficiency in the amount of light from the light source produced by the electrical energy from the internal power source relative to a desired amount of light for imaging.

Abstract: An apparatus for ascertaining the number of cells of an endothelium of a cornea of a subject's eye includes a display for displaying an image of cells of an endothelium of a photographed cornea, square meshes for partitioning the image of the cells displayed on the display by the unit area, and an enlarging device for enlarging and displaying an area partitioned by one of the square meshes on the display. The square meshes and the image are correlatively moved in a right or left direction on the display. An operator counts the number of the cells per unit area in an enlarged image, so that the operator ascertains the total number of the cells of the corneal endothelium.

Abstract: An ophthalmological photographing instrument for fluorescent photograph comprising a device for irradiating illuminating light to a fundus of an eye to be tested, a device for projecting target luminous light to the eye, an image receiving device capable of receiving a reflection image of the target luminous flux reflected by the eye together with an image of the fundus of the eye, and observation/photographing means for receiving and photographing an image of the eye received by the image receiving device, wherein the ophthalmological photographing instrument further comprises a moving picture recording device into which the received image output coming from the image receiving device is input, a timer for counting time which has elapsed since the time when a fluorescent agent for the use of the fluorescent photograph has been injected into a vein, and a quenching device for reducing or quenching the target luminous flux after the passage of a predetermined time from the time when the injection of the fluore

Abstract: A fundus camera capable of adjusting a working distance between a camera body and a subject's eye quickly and easily with high accuracy and capable of observing an eye fundus image in a field of view and at a magnification each substantially same as those selected when an eye fundus is photographed. To adjust the working distance quickly and easily with high accuracy, the fundus camera has an optical member 59 provided in a projecting optical system 56 for projecting alignment light onto a subject's eye E. The optical member 59 projects split alignment images onto the eye E when the working distance W is out of a predetermined proper distance. To observe the eye fundus image in the substantially same field of view and at the substantially same magnification as those selected when the eye fundus is photographed, the fundus camera has a device for, according to power variation, changing a state of illumination light illuminating the eye E.