초록 ▼

Apparatus is disclosed for illuminating a distant object such as a vehicle license plate, and for reading optical information on the distant object. The apparatus is a self-contained, compact unit which includes a radiation source for illuminating a selected area of the object and a CCD camera for r

Apparatus is disclosed for illuminating a distant object such as a vehicle license plate, and for reading optical information on the distant object. The apparatus is a self-contained, compact unit which includes a radiation source for illuminating a selected area of the object and a CCD camera for receiving radiation from the object and for producing an electrical signal representative of optical information on the object. The radiation source is coaxial with an imaging lens of the camera and includes arrays of LED\s spaced around an optical axis passing through the imaging lens. The LED\s emit radiation in the near infrared region and are strobed at a predetermined frequency during the acquisition of the information.

대표청구항 ▼

Apparatus for reading optical information contained on a distant object, said apparatus comprising: a camera for receiving radiation from said object and for producing an electrical signal representative of said optical information, said camera having an imaging lens disposed on an optical axis exte

Apparatus for reading optical information contained on a distant object, said apparatus comprising: a camera for receiving radiation from said object and for producing an electrical signal representative of said optical information, said camera having an imaging lens disposed on an optical axis extending through said apparatus; an illumination source for projecting a beam of illuminating radiation along said axis and onto said object, said source being generally coaxial with said lens and including one or more two-dimensional arrays of LED\s arranged about said optical axis, said LED\s emitting invisible infrared radiation with a wavelength above 700 nm; and a power supply for said illumination source, said power supply including a means for strobing said LED\s at a predetermined frequency.