Abstract: Provided is a photographing apparatus. The photographing apparatus includes: a main body having an image pickup device disposed therein; a middle cover disposed in a back side of the main body and includes a first opening disposed to correspond to a position of the image pickup device; a first connector formed on the middle cover and around the first opening, where the first connector is configured to couple to an external optical component and is disposed so that the an optical axis of the image pickup device coincides with an optical axis of the external optical component, when the external optical component is coupled to the first connector; and a rear cover disposed on the middle cover and includes a second opening disposed to correspond to the position of the image pickup device.

Abstract: A method for generating video data and an image photographing device implementing the same are provided. The method includes acquiring annular panoramic video data by performing panoramic video photographing, selecting an extraction area from each frame of the annular panoramic video data, and generating video data by combining the extraction area selected from each frame.

Abstract: A recording/reproducing apparatus having an optical pickup device which is efficient in light use having little spherical aberration.

Abstract: Provided is a photographing apparatus. The photographing apparatus includes: a main body having an image pickup device disposed therein; a middle cover disposed in a back side of the main body and includes a first opening disposed to correspond to a position of the image pickup device; a first connector formed on the middle cover and around the first opening, where the first connector is configured to couple to an external optical component and is disposed so that the an optical axis of the image pickup device coincides with an optical axis of the external optical component, when the external optical component is coupled to the first connector; and a rear cover disposed on the middle cover and includes a second opening disposed to correspond to the position of the image pickup device.

Abstract: A recording/reproducing apparatus having an optical pickup device which is efficient in light use having little spherical aberration.

Abstract: A lens system and a photographing apparatus including the lens system are provided, the lens system including a first sub lens system that includes a plurality of lens groups, and a second sub lens system that includes a replacement lens group that replaces or is replaced by some of the plurality of lens groups.

Abstract: A method of compensating for vibration and an imaging apparatus are provided. The method of compensating for vibration includes determining whether a vibration compensation starting condition is satisfied, and starting compensating for vibration prior to operating a shutter, if the vibration compensation starting condition is satisfied. Accordingly, a shutter lag is reduced and power consumption is reduced, and accuracy of vibration compensation is improved.

Abstract: An image stabilizing apparatus may include a fixing member disposed to a lens assembly having a through hole of which a center coincides with an optical axis of the lens assembly, a moving member disposed to move perpendicular to the optical axis with respect to the fixing member having a lens holder projecting in a direction of the optical axis to hold a compensating lens, a driving portion causing the moving member to move in a first direction perpendicular to the optical axis and in a second direction perpendicular to the optical axis and the first direction, four position determining portions formed in the first direction and the second direction on an outer circumferential surface of the lens holder of the moving member, and four stoppers projecting from an outer circumferential surface of the through hole of the fixing member to the moving member.

Abstract: A method for generating video data and an image photographing device implementing the same are provided. The method includes acquiring annular panoramic video data by performing panoramic video photographing, selecting an extraction area from each frame of the annular panoramic video data, and generating video data by combining the extraction area selected from each frame.

Abstract: A zoom optical system including a first lens group including a plastic aspherical lens and having a negative refractive power, a second lens group having a positive refractive power, and a third lens group having a positive refractive power, wherein the first lens group, the second lens group and the third lens group are arrange sequentially from an object side to an image side, and wherein the plastic aspherical lens satisfies the following Inequality: 0?(R21?R22)2?0.04, where R21 denotes the radius of curvature of the plastic aspherical lens corresponding to the object side, and R22 denotes the radius of curvature of the plastic aspherical lens corresponding to the image side.

Abstract: A lens system and a photographing apparatus including the lens system are provided, the lens system including a first sub lens system that includes a plurality of lens groups, and a second sub lens system that includes a replacement lens group that replaces or is replaced by some of the plurality of lens groups.

Abstract: A method of compensating for vibration and an imaging apparatus are provided. The method of compensating for vibration includes determining whether a vibration compensation starting condition is satisfied, and starting compensating for vibration prior to operating a shutter, if the vibration compensation starting condition is satisfied. Accordingly, a shutter lag is reduced and power consumption is reduced, and accuracy of vibration compensation is improved.

Abstract: A unit to remove crosstalk in a multi-layered disk, an optical pickup including the unit, and an optical recording and/or reproducing apparatus including the optical pickup, of which the optical pickup includes: a light source; an optical path changer to change the path of light emitted from the light source; a unit to remove crosstalk; an objective lens to focus incident light on a disk; and a photodetector detecting light reflected by the disk such that the unit to remove crosstalk separates light reflected by a target recording layer of the disk from light reflected by adjacent recording layers so that the light reflected by the target recording layer and the light reflected by the adjacent recording layers do not overlap on the photodetector.

Abstract: A zoom optical system including a first lens group including a plastic aspherical lens and having a negative refractive power, a second lens group having a positive refractive power, and a third lens group having a positive refractive power, wherein the first lens group, the second lens group and the third lens group are arrange sequentially from an object side to an image side, and wherein the plastic aspherical lens satisfies the following Inequality: 0?(R21?R22)2?0.04, where R21 denotes the radius of curvature of the plastic aspherical lens corresponding to the object side, and R22 denotes the radius of curvature of the plastic aspherical lens corresponding to the image side.

Abstract: An optical pickup apparatus includes a first objective lens having a low numerical aperture (NA) suitable for a low-density recording medium, a second objective lens having a high NA suitable for a high-density recording medium, a first light source to generate a short-wavelength optical signal to use the first and second objective lenses, a first photo-detector to receive an optical signal, which is generated from the first light source, is focused on a recording medium by the first and second objective lenses, and is then reflected from the recording medium, and a beam splitter to perform a division of the optical signal generated from the first light source, to direct some parts of the divided optical signal to the first objective lens, and to direct the other parts of the divided optical signal to the second objective lens.

Abstract: An optical pickup device according to an embodiment of the present invention comprises a light source for projecting a beam of light to record and reproduce information with respect to an optical recording medium. A collimating lens is disposed on a path of the light to converge and convert the light into a parallel beam. An object lens condenses the parallel beam from the collimating lens and projects the parallel beam onto the optical recording medium. An optical element is disposed between the collimating lens and the object lens. A first actuator moves the collimating lens along the optical axis to thereby control a distance between the collimating lens and the optical element. A first controller drives the first actuator to find a position for the collimating lens, for reducing aberration generated in the light being projected to the optical recording medium. Accordingly, the aberration can be effectively prevented, thereby improving recording and reproducing performance of the optical pickup device.

Abstract: An image stabilizing apparatus may include a fixing member disposed to a lens assembly having a through hole of which a center coincides with an optical axis of the lens assembly, a moving member disposed to move perpendicular to the optical axis with respect to the fixing member having a lens holder projecting in a direction of the optical axis to hold a compensating lens, a driving portion causing the moving member to move in a first direction perpendicular to the optical axis and in a second direction perpendicular to the optical axis and the first direction, four position determining portions formed in the first direction and the second direction on an outer circumferential surface of the lens holder of the moving member, and four stoppers projecting from an outer circumferential surface of the through hole of the fixing member to the moving member.

Abstract: An optical pickup which is compatible with different types of media is disclosed. A plurality of light sources emit light with different wavelengths. Light path changers change the path of light emitted by the plurality of light sources so that the light is incident upon an objective lens. The objective lens focuses the incident light onto a recording medium. A collimating lens is disposed in front of the objective lens to collimate the incident lights. The collimating lens is movable to correct a spherical aberration. A diffractive optical element is disposed in a path of a light with a short wavelength and has a diffractive surface to correct a chromatic aberration.

Abstract: An optical pickup apparatus compatible with at least two types of optical recording media, using light beams having respective different wavelengths for recording and reading information, the optical pickup apparatus including two laser light sources to emit light beams having the different wavelengths, a holographic lens including a holographic ring to transmit the light beams incident in an inner region of the holographic ring, and to diffract a specific light beam among the light beams emitted from the laser light sources incident in an outer region relative to the inner region, an objective lens to focus the light beams passed through the holographic ring lens on the respective information recording surfaces of the two types of the optical recording media, optical elements to alter optical paths of the light beams reflected from the information recording surfaces of the optical recording media to corresponding photodetectors.

Abstract: A projection-type image display apparatus having a structure adapted so that the efficiency of the use of light and resolving power thereof can be enhanced. The projection-type image display apparatus includes a light source; a color separation unit separating incident rays according to predetermined wavelengths, and directing the separated rays at different angles; a lens array dividing the rays separated by the color separation unit into predetermined pixels; a driving portion driving the lens array to change the proceeding paths of the color rays; a polarizing beam splitter changing a proceeding path of incident rays depending on a direction of polarization; a reflection-type display device producing a color image using the rays entering via the polarizing beam splitter, and reflecting the color image toward the polarizing beam splitter; and a projection lens unit magnifying and projecting an incident image onto a screen. In addition, the projection-type image display apparatus may comprise.