摘要:
A fundus camera includes an optical path splitting unit arranged between a focusing unit and an imaging unit. The splitting unit has characteristics adapted to reflect light of a visible light region and to transmit near-infrared light. The splitting unit retreats from an optical path when a still fundus image is photographed. A quick-return mirror having such characteristics is used as the splitting unit. When near-infrared illumination light having a wavelength of about 850 nm is used, such light can be incident upon the imaging unit without loss of the amount of light. Visible light output from an internal fixation target is projected onto a subject's eye. A cornea diaphragm and a crystalline lens diaphragm are used for observing a fundus with invisible light. Each of the cornea diaphragm and crystalline lens diaphragm can be changed to another one having a different diameter.
摘要:
An opthalmologic imaging apparatus that captures a fundus image of a subject's eye includes a first extraction unit configured to extract, from a first fundus image photographed with a first light quantity, an image of a first area having intensity not less than predetermined intensity and an image of a second area other than the first area, a second extraction unit configured to extract an image of an area corresponding to the first area from a second fundus image photographed with a second light quantity based on the light quantity of the first area, a third extraction unit configured to extract an image of an area corresponding to the second area from a third fundus image photographed with a third light quantity based on the light quantity of the second area, and an image combining unit configured to combine the images extracted by the second and the third extraction units.
摘要:
A fundus camera includes an optical path splitting unit arranged between a focusing unit and an imaging unit. The splitting unit has characteristics adapted to reflect light of a visible light region and to transmit near-infrared light. The splitting unit retreats from an optical path when a still fundus image is photographed. A quick-return mirror having such characteristics is used as the splitting unit. When near-infrared illumination light having a wavelength of about 850 nm is used, such light can be incident upon the imaging unit without loss of the amount of light. Visible light output from an internal fixation target is projected onto a subject's eye. A cornea diaphragm and a crystalline lens diaphragm are used for observing a fundus with invisible light. Each of the cornea diaphragm and crystalline lens diaphragm can be changed to another one having a different diameter.
摘要:
A fundus camera includes an illumination unit configured to illuminate a fundus of a subject's eye with a visible light from a visible light source, an imaging unit which has sensitivity in a visible wavelength range and is configured to receive a reflected light from the fundus to capture a fundus image, and a light amount balance changing unit configured to independently change at least a part of a light amount emitted from LED elements wherein the visible light source includes a plurality of the LED elements discretely arranged into a ring shape.
摘要:
An image pick-up apparatus includes an image pick-up device and a filter circuit. The image pick-up device includes a pixel portion for converting a subject image into an electric signal, a scanning circuit for dividing the pixel portion into a plurality of areas, for non-linearly dividing the boundary of the areas of at least one side of the adjacent areas based on the unit of pixel, and a plurality of output circuits for individually outputting video signals. The filter circuit performs filter processing of the video signals outputted from the plurality of output circuits for the pixels near the boundary of the areas. Thus, the image quality can be improved in the multi-channel output system.
摘要:
A image pick-up device includes a pseudo signal generating circuit which generates a pseudo video signal, a pseudo signal reading circuit which reads and outputs the pseudo signal from the pseudo signal generating circuit, and a level control circuit which controls the level of a signal outputted by the pseudo signal generating circuit or read into a pseudo signal reader. The image pick-up device can detect the property difference in signal lines.
摘要:
An image pickup apparatus including: CCD image pickup device; a light blocking plate for shutting out light incident upon the image pickup device; an exposure period controlling section for setting exposure time by controlling the light blocking plate and the image pickup device; a dark signal storing section for storing dark signals obtained from the image pickup device in a state where light is shut out by the light blocking plate; a subtracting section for subtracting the dark signals from main image pickup signals of the image pickup device; a defect detecting section for detecting defects from the subtracted image pickup signals outputted from the subtracting section; and a defect correcting section for performing correction of the detected fault pixels. It is thereby possible to achieve an image pickup apparatus capable of detecting and correcting at high accuracy those fault pixels occurring afterwards because of changes due to the passage of time or those fault pixels transiently occurring under certain modes.
摘要:
A translated text creator translates a text in which an unknown word is left in an original language representation without being translated, while known words are translated. Translated text created by the translated text creator is displayed. A link setter sets a link for performing a search for the unknown word in a search field of a selected Internet search engine which corresponds to a field of a subject matter of the original text.
摘要:
A translated text creator translates a text in which an unknown word is left in an original language representation without being translated, while known words are translated. Translated text created by the translated text creator is displayed. A link setter sets a link for performing a search for the unknown word in a search field of a selected Internet search engine which corresponds to a field of a subject matter of the original text.
摘要:
An addition symbol to add two destinations selected from a list of destinations including a group name representing mail addresses of multiple members, and a subtraction symbol to subtract a mail address of an arbitrary member from a group destination are predefined in electronic mail software, so that when an electronic mail message is transmitted to multiple destinations from a communication terminal, the addition symbol or the subtraction symbol is placed between one destination and the other destination in a destination field in a window for composing an electronic mail message to add a destination address to or delete a personal address of a group member from a group name.