Optical device for emitting a laser light beam, optical reader comprising said device and protective/insulating package for a light beam emission source

An optical reader, comprising:

• a laser light beam emission device for illuminating an optical code,
• means for generating at least one scan of said optical code,
• photo-detecting means which collects a luminous signal diffused by the illuminated optical code and generates an electrical signal proportional thereto, and
• processing means for processing the electrical signal,
• wherein the laser light beam emission device comprises:
• a laser light beam emission source including a protective and/or insulating package and means for generating a laser light beam housed within the package, the package being provided with a laser light beam emission window;
• wherein the package comprises a diaphragm which defines an aperture for selecting a central portion of the generated laser light beam so that the selected central portion of the generated laser light beam is propagated out of the package and has a predetermined diffraction pattern, while propagation of the remaining portion of the generated laser light beam is obstructed;
• wherein only the selected central portion of the generated laser light beam passes through said emission window.

An optical reader comprising:

• a light beam emission device which generates a light beam for illuminating an optical code,
• means for generating a scan of the optical code,
• a device for detecting the luminous signal diffused by the illuminated optical code and for generating an electrical signal proportional thereto,
• means for processing the electrical signal,
• wherein the emission device and the detection device are integrated in a single device, the single device comprising a source of light beam including a protective and/or insulating package and means for generating the laser light beam housed within the package, the package being provided with a laser light beam emission window;
• wherein the package comprises a diaphragm which defines an aperture for selecting a central portion of a generated laser light beam so that the selected central portion of the generated laser light beam is propagated out of the package and has a predetermined diffraction pattern, while propagation of the remaining portion of the generated laser light beam is obstructed;
• wherein only the selected central portion of the generated laer light beam passes through said emission window.

An optical reader comprising:

• a light beam emission device which generates a light beam for illuminating an optical code,
• means for generating a scan of the optical code,
• a device for detecting the luminous signal diffused by the illuminated optical code and for generating an electrical signal proportional thereto,
• means for processing the electrical signal,
• wherein the emission device and the detection device are integrated in a single device, the single device comprising a source of the light beam including a protective and/or insulating package, means for generating the light beam housed in a first portion of the package, a light beam emission window being formed in the first portion of the package, and photo-receiving means which detects a luminous signal diffused by an optical code illuminated by the source, the photo-receiving means being housed in a second portion of the package, the second portion of the package being optically separate with respect to the first portion, the second portion of the package being provided with a window for collecting the luminous signal diffused by the illuminated optical code, said emission and collecting windows being formed on respective first and second walls of the package which lie on different planes.