Aiming Optics for Imaging Modules

Generally speaking, an imaging module may be configured with an aiming optics system. An aiming optics system is comprised of an aiming light source and an optical element that projects the rays of the aiming light source onto a target. The aiming optics element is typically a spherical lens that can image rays of light in a horizontal and vertical plane. Alternatively, the aiming optics can be a combination of wedge and cylindrical lens elements. In addition, a diffuser may be included to diffuse light in a horizontal direction.

Aiming optics are often used to provide a crisp aiming pattern over a wide range of distances. Aiming patterns are generated by slit apertures that are shaped to produce the desired aiming pattern. These slit apertures are typically provided on a retainer assembly 80 or on a support assembly 80. The supporting assembly 80 may include a back plate 30, a containment section 81 and a retainer section 82. These elements can be integrated into a single support assembly that is mounted to the first circuit board.

The aiming Ottiche da puntamento system can include a light pipe that is integrated with an aiming light source and a spherical lens to provide a clear aiming pattern. The light pipe is positioned behind the aiming optics and is able to prevent divergence of aiming illumination rays from the aiming light source. The light pipe 311 has a light reflective element 640 and an aiming optic 25 that transmits light from the aiming light source. The aiming optics are disposed forward of the light reflective element 640 and a spherical lens 25 that images rays of light from the aiming light source. These spherical lenses can be positioned as close to the aiming light source as possible.

Aiming optics are incorporated into an optical plate 26. The plate is a semitransparent layer over a cavity that is disposed between the aiming LED 18 and the light reflective element 640. The spherical lenses 25 can be positioned optically forward of the aiming aperture 43 and a prism can be disposed in the optical plate 25p to image the light from the aiming aperture 43 onto the target. The aiming optics and the light reflective element are stacked together in a stacked up configuration that allows for the optimum positioning of the aiming optics and the light reflective element.

An optical plate can be configured to include a refractive optic diffuser that is a combination of substantially cylindrical microlenses that have a radius of curvature of about three mm. The refractive optic diffuser may be positioned on a light exit surface to diffuse light in a horizontal direction. The plate can also be positioned optically forward of the spherical lens 25 to prevent light transmitted by the aiming LED 18 from interfering with the receive optical system.

The image sensor and the aiming light source are mounted on a first circuit board 14a. The processing circuitry is mounted on a rear side 14a-r of the PCB 14a. The first circuit board 14a can include a 2D image sensor and a plurality of aiming LEDs.

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