Abstract:
A line scan camera comprises a printed circuit board upon which a charge-coupled device (CCD) is mounted. A lens component is fixed within a lens mount, and the base of the lens mount is adjustably mounted upon an optical bench. Calibration devices adjustably interconnect the lens mount to the printed circuit board and to the optical bench so as to calibrate the positional location of the lens component relative to the charge-coupled device (CCD) and to an object plane past which objects to be scanned and photographed are conveyed. In this manner, the focus distance defined between the lens component and the charge-coupled device (CCD) as well as the focal distance defined between the lens component and the object plane are fixed and do not need any further calibration. The object plane is defined upon the front surface of a sealed housing enclosure and all of the components are disposed within the housing enclosure so as to prevent dust and contaminants from collecting upon the optical components. LED arrays are disposed within the front of the housing so as to illuminate and properly expose the objects conveyed past the object plane. A positive pressure differential is also created within the sealed housing enclosure so as to prevent the ingress of dust and contaminants into the housing enclosure.
Abstract:
A line scan camera comprises a printed circuit board upon which a charge-coupled device (CCD) is mounted. A lens component is fixed within a lens mount, and the base of the lens mount is adjustably mounted upon an optical bench. Calibration devices adjustably interconnect the lens mount to the printed circuit board and to the optical bench so as to calibrate the positional location of the lens component relative to the charge-coupled device (CCD) and to an object plane past which objects to be scanned and photographed are conveyed. In this manner, the focus distance defined between the lens component and the charge-coupled device (CCD) as well as the focal distance defined between the lens component and the object plane are fixed and do not need any further calibration. The object plane is defined upon the front surface of a sealed housing enclosure and all of the components are disposed within the housing enclosure so as to prevent dust and contaminants from collecting upon the optical components. LED arrays are disposed within the front of the housing so as to illuminate and properly expose the objects conveyed past the object plane. A positive pressure differential is also created within the sealed housing enclosure so as to prevent the ingress of dust and contaminants into the housing enclosure.
Abstract:
Disclosed herein is an improved lens focusing and holding arrangement for an imaging system of the type which may include a photosensor array. The lens may be in contact with a reference surface or surfaces formed within the imaging system housing and may be translatable along the surface in directions toward and away from the photosensor array in order to adjust the focus of the imaging system. A lens retention clip may be provided to secure the lens within the imaging system housing and to cause translational movement of the lens along the imaging system reference surface. When focusing the imaging system, the lens retention clip may be in a first operating condition in which the lens retention clip applies a relatively small force tending to hold the lens in contact with the housing reference surface. After the desired focus has been set, the lens retention clip may be placed in a second operating condition in which the lens retention clip applies a relatively high force tending to hold the lens in contact with the housing reference surface, thus locking the lens in place.
Abstract:
An image reading apparatus includes a light source that emits light in a main scanning direction to a subject to be read, a light receiving unit that receives light reflected by the subject to be read, and an optical system that images the light reflected by the subject to be read and guides the light to the light receiving unit. The optical system includes a reflector mirror that reflects the light reflected by the subject to be read, and an optical element that is disposed adjacent to the reflector mirror and images the light reflected by the subject to be read. The optical element is held by the reflector mirror.
Abstract:
An image sensor (100) comprises a lens (4), a sensor (6) and a first casing (1). The lens (4) is configured to focus light irradiated toward an object to be read (30) from a direction tilted relative to the X-Z plane, and reflected by the object to be read (30). The sensor (6) is configured to receive the light focused by the lens (4). The first casing (1) is configured to contain or retain the lens (4) and the sensor (6) and to have, in a surface (1j) extending along a main scanning direction, a tilted portion having a length in a sub-scanning direction that decreases toward the object to be read (30).
Abstract:
An image reading apparatus includes an array substrate in which a plurality of point light sources is mounted along the main scanning direction, a light guide member disposed on a surface of the array substrate that mounts the plurality of point light sources, and guiding light from the plurality of point light sources to the document surface, a frame for fixing the light guide member and the array substrate, a positioning unit that determines the positional relationship of the frame with the light guide member and the array substrate in a configuration in which the incident surface of the light guide member is in proximity to or in contact with the plurality of point light sources; and an image reading unit that uses reflected light when illuminating light from the plurality of point light sources through the light guide member onto the document surface to thereby read the document image.
Abstract:
A document reading apparatus includes a document positioning plate on which a document is placed, an image-forming unit configured to cause a light from the document to form an image, a reading unit configured to receive the light from the document which has passed through the image-forming unit, a supporting member for supporting the image-forming unit, a fixing member for fixing a reading element, and a frame member for holding the image-forming unit, the supporting member, the reading element and the fixing member.
Abstract:
An optical scanning device includes a light source, an optical system, and a housing. The light source projects a light beam. The housing includes a holder and encloses the optical system. The optical system includes a liquid crystal element held by the housing via the holder, to modulate a phase of the light beam projected from the light source against a scanned surface. The liquid crystal element includes a plurality of substantially transparent substrates, a liquid crystal layer, and a sealing member. One of the plurality of the transparent substrates has a size larger than any other transparent substrates and is positioned in the holder. The liquid crystal layer is sandwiched between the plurality of substantially transparent substrates. The sealing member seals the liquid crystal layer between the plurality of substantially transparent substrates.
Abstract:
An optical unit including a lens unit including a lens and an optical element configured to receive a light beam focused by the lens, and a support member configured to support the lens unit. Cutouts are provided on joint surfaces of the lens unit and the support member, respectively, such that the cutouts on the joint surface of the lens unit match the cutouts on the joint surface of the support member. The cutouts are configured to accommodate a jig inserted thereinto and rotated to move the lens unit relative to the support member and adjust a position of the lens unit in a direction parallel to an optical axis of the lens.
Abstract:
A solid-state image pickup device comprising: a multilayer wiring board 2 having an opening portion 21; a spacer 3 covered with a conductive film 32, and fixed to the multilayer wiring board 2 in a state of making the conductive film 32 face contact with a reference potential electrode exposed into the opening portion 21 of the multilayer wiring board 2; a solid-state image pickup element 4 fixed to the spacer 3 in a state of face contact with the conductive film 32 of the spacer 3, and arranged in the opening portion 21; and an optical element 5 fixed at a position opposing the solid-state image pickup element 4 via the spacer 3, and transmitting light into the opening portion.