초록 ▼

A symbology reader employing an area detector and LEDs mounted at various angular orientations on a printed circuit board for illuminating a target object in an object plane. Each of the LEDs is oriented according to a desired beam vector to illuminate a particular area of the object plane so that t

A symbology reader employing an area detector and LEDs mounted at various angular orientations on a printed circuit board for illuminating a target object in an object plane. Each of the LEDs is oriented according to a desired beam vector to illuminate a particular area of the object plane so that the sum of the beams produces a desired illumination pattern. In one embodiment, the illumination pattern is selected to be inversely proportional to the sensitivity of the area detector to provide an even response over an entire image area. The individual LEDs are angularly aligned by an alignment board having an alignment aperture for each LED. The LEDs are mounted onto the printed circuit board with their body portions spaced apart from the board and supported by semi-rigid wire leads soldered to the board. Each of the alignment holes of the alignment board is laterally offset slightly from the mounting position of the LED. The LEDs are angularly aligned by moving the alignment board toward the printed circuit board and engaging sidewalls of the alignment holes with the LED body portions to deflect the LEDs toward a desired angular orientation. When the alignment board reaches a selected distance from the printed circuit board with the LEDs deflected to their desired orientation, the alignment board is fixed in place to hold the LEDs in this orientation.

대표청구항 ▼

An illuminator for producing a desired illumination pattern for illuminating a symbology in an object plane of a symbology reader, comprising: a planar base; at least three illuminating sources, each having a body portion with leads connected at a selected location on the planar base with a space be

An illuminator for producing a desired illumination pattern for illuminating a symbology in an object plane of a symbology reader, comprising: a planar base; at least three illuminating sources, each having a body portion with leads connected at a selected location on the planar base with a space between the body portion and the planar base, each of the illuminating sources when energized emitting a beam of light along a principal emission vector relative to its body portion, the leads of each of the body portions of the illuminating sources being bent to align its principal emission vector with a corresponding desired beam vector toward the object plane, the desired beam vectors being nonparallel and selected to produce the desired illumination pattern when the illuminating sources are energized; and an alignment board positioned adjacent to the planar base, between the planar base and the object plane, the alignment board having at least three alignment apertures therethrough, each corresponding to one of the illuminating sources, each alignment aperture being defined by a sidewall conforming to the shape of the body portion of the corresponding illuminating source and being angularly oriented and offset from the selected location of the illuminating source on the planar base to engage the body portion and hold the leads in their bent state to maintain the alignment of the principal emission vector with the desired beam vector for the corresponding illuminating source.