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US 6,211,508 B1Granted
Lensless optical system in imaging sensing module
AssigneeSyscan, Inc.
InventorDongtai Liu
Life of this patent
Estimating the term…
Abstract
A lensless optical system comprises identical tubes that can be made and molded out of a plastic material. Each of the tubes includes an opening at the end that faces a scanning object. When the scanning object is illuminated and passes through the image sensing module, openings of all the tubes capture incident light reflected from the scanning object and the captured light passes the tubes and subsequently impinges onto the image sensor. An image of the scanning object is produced when the image sensor is activated.
Claims19
An image sensing module comprising:
- an image sensor;
- a plurality of identical hollow tubes closely affixed together in parallel and mounted above and sufficiently covering the image sensor;
- each of the hollow tubes including an opening at one end facing a scanning object;
- and
- wherein reflected light from the scanning object is collected by the openings of the tubes and impinged through the hollow tubes onto the image sensor that produces an image of the scanning object when the image sensor is activated.
2 more elements
An image sensing module comprising:
- an array of photodetectors having an array length long enough to cover an entire width of a scanning object;
- an elongated lensless optical system having a length enough to cover the entire width of the scanning object;
- the optical system mounted in front of the array of photodetectors and comprising a plurality of identical hollow tubes affixed together in parallel;
- each of the hollow tubes having an opening facing the scanning object;
- and
- wherein the opening of each of the hollow tubes captures incident light reflected from the scanning object illuminated by an illumination source;
- the incident light passes the hollow tubes and impinges upon the array of photodetectors that generates electronic signals representing the incident light.
4 more elements
Dependencies are inferred from the claim text.