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Recirculation collimator

IP.com Disclosure Number: IPCOM000249947D
Publication Date: 2017-May-05

Publishing Venue

The IP.com Prior Art Database

Abstract

This disclosure relates generally to a compact validator subassembly. More specifically, this disclosure relates to illuminating documents with a substantially constant irradiance level of light even though the distance between the light source and the documents vary from one document to another. Disclosed is a subassembly for a document validator, the sub-assembly comprising: a housing; a light pipe core having a top diffusing surface and seated in the housing; a light control component associated with the top diffusing surface, the light control component including a reflective layer, at least one non-reflective layer, and an acrylic wafer, the light control component including an array of apertures in the reflective and non-reflective layers, wherein each aperture is substantially the length of the light control component; a plurality of light-emitting diodes (LEDs) coupled to the housing.

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Title: Recirculation collimator

Technical Field

This disclosure relates generally to a compact validator subassembly.

More specifically, this disclosure relates to illuminating documents with a substantially constant irradiance level of light even though the distance

between the light source and the documents vary from one document to another.

Brief description of the drawings

For a more complete understanding of this disclosure, reference is now made to the following description, taken in conjunction with the

accompanying drawings, in which:

FIG. 1 illustrates a document validator subassembly according to various embodiments of the present disclosure;

FIGS. 2A-2B illustrates an exploded view of the document validator

subassembly according to various embodiments of the present disclosure;

FIGS. 3A-3C illustrate different views of a light control component (LCC) according to an embodiment of the present disclosure;

FIG. 4 illustrates a cross-sectional view of a light control component (LCC) according to an embodiment of the present disclosure;

FIGS. 5A-5B illustrate a top view of a LCC with different size patterns

according to various embodiments of the present disclosure;

Detailed description

FIGURES 1 through 5B, discussed below, and the various embodiments used to describe the principles of the present invention in this

patent document are by way of illustration only and should not be construed in any way to limit the scope of the disclosure. Those skilled in the art will

understand that the principles of this disclosure may be implemented in any suitably arranged device or system.

One or more embodiments of this disclosure provides a thin thermoplastic wafer adhered to by layers of optically and infrared opaque

black tapes. These tapes can either be cut before being applied or after

application to the wafer in order to produce a series of aligned collimation features. The sides of the tape facing the light source are produced from a

reflective tape which causes the light that is not allowed to pass through to be re-circulated into the light source to then be re-emitted. This

embodiment provides collimation and recirculation in one item.

The embodiments disclosed herein recognize and take into account that alternative means of producing collimated light from a diffuse source,

and recirculation of non-useful rays utilize a piece of plastic with oblong openings that collimate in one axis and a thin film to re-circulate light

through a series of micro-prisms. This alternative relies on total internal

reflection off of a prismatic surface. The embodiments of this disclosure however accomplish recirculation through a planar reflector.

The one or more embodiments herein provide a cost effective

alternative to molded solutions. For example, molded solutions where alternate black and clear materials are molded together, like long carbon

fiber (LCF).

FIG. 1 illustrates a document validator subassembly 100 according to various embodiments of the pres...