摘要:
A lens unit structure for an SLR digital camera is provided with a photographing lens block and a finder block. The photographing lens block includes a lens barrel having a pair of guide shafts extending in parallel with an optical axis. Ends of the guide shafts are secured to the lens barrel. A focusing lens and a zoom lens are slidably supported by the guide shaft so as to move in a direction of the optical axis, but prevents the lenses from moving in a direction perpendicular to the optical axis. The finder block includes a casing that accommodates a finder optical system, a CCD, and a beam splitter. The beam splitter splits the light from the photographing lens block into components directed to the finder optical system and the image capturing element. The casing has a plurality of holes respectively receiving the pair of guide shaft members.
摘要:
A structure for mounting a solid-state imaging device on an optical unit, which includes a metal plate having a flat surface, a backside surface opposite to the flat surface, a projected surface projected by a predetermined height from the flat surface, the projected surface being parallel to the flat surface, and at least one opening formed on the projected surface and accessible through the backside surface; the solid-state imaging device having a front surface for receiving light and a back surface, the imaging device being secured to the metal plate by means of adhesive applied at least to a corner edge portion formed by the inner circumferential surface of the at-least-one opening of the metal plate and the back surface of the imaging device when the imaging device contacts the projected surface of the metal plate; and fixing members for fixing the metal plate carrying the imaging device thereon onto the optical unit.
摘要:
A real image type finder is provided with an imaging optical system, a focusing glass disposed at a focusing surface of the imaging optical system, an observing optical system for observing an image formed on the focusing glass, a case that accommodates the focusing glass and the observing optical system. The case is formed with an opening that allows only the focusing glass to be inserted in/withdrawn from the case therethrough. The finder is further provided with a covering means that removably covers the opening.
摘要:
A zoom lens barrel includes a cam ring which is driven to rotate; a first lens frame which is positioned around the cam ring, supports a frontmost lens group of a zoom lens system, and includes a first cam follower; a light-shield exterior ring positioned around the first lens frame, and includes a second cam follower; and first and second outer cam grooves formed on an outer peripheral surface of the cam ring so that the first and second cam followers are engaged in the first and second outer cam grooves, respectively. The second cam follower is engaged in the second outer cam groove through a linear guide slot formed on the first lens frame. Zooming ranges of the first and second outer cam grooves are shaped so as to move the first lens frame and the light-shield exterior ring in the same moving path.
摘要:
In an optical system comprising a light source section consisting of a semiconductor laser and a collimator lens, an objective lens for focusing a light beam on an optical disk, a beam splitter for separating part of the light beam reflected from the optical disk, a condenser lens, and a photosensor for detecting the separated light beam to produce a focusing and a tracking error signal, a plane parallel plate is provided between the light source section and the beam splitter. By rotating the plane parallel plate with an adjusting mechanism, the light beam undergoes a parallel shift, so that the intensity distribution of light being incident on the objective lens is varied and a tracking offset due to a deviation of the optical axis of the output light from the light source section can be compensated for. The plane parallel plate may be disposed between the beam splitter and the condenser lens.
摘要:
A magneto-optical disk drive system is provided with a housing and a disk cartridge for housing a magneto-optical disk therein. The disk cartridge is insertable into the housing, an optical head is disposed in the housing for movement in a first radial direction of the magneto-optical disk on one side thereof. A magnetic head is disposed in the housing for movement in a second radial direction of the magneto-optical disk on an opposite side thereof, and a position sensor is coupled to the optical and magnetic heads, for detecting the relative position of the optical and magnetic heads. A first position adjuster disposed in the housing for aligning the first and second radial directions with each other, second position adjuster disposed in the housing for positionally aligning the optical head and the magnetic head with each other across the first and second radial directions, and third position adjuster is disposed in the housing for positionally adjusting the position sensor with respect to the optical head and the magnetic head along the first and second radial directions.
摘要:
A reflected light beam from a magneto-optic disk is reflected by a first and second reflective element toward a signal detecting system. The first reflective element reflects the reflected light from the magneto-optic disk and gives a phase difference into the light beam. The second reflective element reflects the reflected light by the first reflective element toward the signal detecting system, and gives a phase difference which has the same amount as the phase difference caused by the first reflective element, but with the inverse sign thereof.
摘要:
An apparatus for measuring a wave front aberration including a light beam splitter for dividing a parallel laser light beam incident from a measuring object into two beam fluxes, an image rotator disposed in at least one optical path of the divided beam fluxes for rotating the wave from on the optical axis, an interference device for interfering, after superposing the beam fluxes, whose wave fronts are rotated relatively, an imaging lens for forming the interfered beam into an image, and an observation device for observing the imaged interference fringes.
摘要:
An imaging unit includes an incident-side reflecting surface provided in a casing and reflects object-emanating light, entering the casing in a thickness direction thereof, along a lengthwise direction of the casing; a movable lens group movable along the lengthwise direction of the casing; an exit-side reflecting surface reflecting the light in the thickness direction of the casing; an image sensor provided in the casing and receiving the light from the exit-side reflecting surface; a light shield frame between the movable lens group and the exit-side reflecting surface; and a light-shield-frame position adjustment mechanism provided in the casing, which maintains a constant distance between the movable lens group an the light shield frame when the movable lens group moves in a first moving range, and varies the distance between the movable lens group and the light shield frame when the movable lens group moves in a second moving range.
摘要:
An imaging device includes an imaging optical system including at least one movable optical element; an image sensor, an imaging surface of which lies on an image-forming plane of the imaging optical system; a circuit board on which the image sensor is mounted; and an image processing circuit for processing an image signal output from the image sensor and a drive circuit for the movable optical element, both of the image processing circuit and the drive circuit are mounted on the circuit board. The image processing circuit and the drive circuit are disposed on the circuit board in that order from a side closer to the image sensor.