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Scanner utilizing light pipe with diffuser

A diffuser and diffused light technology, which is applied in the field of scanners, can solve the problems that cannot be used relatively as a plane, large space, etc., and achieve the effect of reducing size, improving precision, and accurate display

Inactive Publication Date: 2003-06-25
LUMINIT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing scanners take up too much space in the systems and housings in which they are used due to the need to illuminate and focus the light
For example, such scanners, like the various encoders described, cannot be used in a relatively planar manner.

Method used

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  • Scanner utilizing light pipe with diffuser
  • Scanner utilizing light pipe with diffuser
  • Scanner utilizing light pipe with diffuser

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0047] figure 1 It is an explanatory diagram of an example of the system 100 for making a variable diffuser or a principal plane of a variable diffuser according to the first embodiment. The variable diffuser master can be used to subsequently form a variety of variable diffusers on the holographic medium by printing the pattern on the variable diffuser master onto the holographic medium. The system 100 may include a collimated light source, such as a laser 110 , an objective lens 120 , a cylindrical lens 130 , a mask 140 and a plane 150 . All components of system 100 may be positioned along the x-axis. Plane 150 may be positioned at a distance d from mask 140 along the x-axis. During operation, the laser 110 can project light onto the plane 150 through the objective lens 120 , the cylindrical lens 130 and the mask 140 to form diffuse symbols or micro-spot symbols on the plane 150 . The size, shape and mutual distance of the objective lens 120 , the cylindrical lens 130 and...

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PUM

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Abstract

A scanner that can include a light source (3810) emitting light through a light pipe (3820) to a detector array. The light pipe can include a reflective surface (3822) and a diffuser (3824). The reflective surface can reflect light (3815), directly or indirectly towards the diffuser and the diffuser can diffuse the light out of the light pipe. The light pipe can further include a reflective groove that reflects ligth from the reflective surface towards the diffuser. The diffuser can diffuse the light to an object that reflects the light to the detector array. The object may be a bar code, paper money, or any other object that can be scanned. The diffuser may be a variable diffuser.

Description

technical field [0001] The present invention is directed to scanners and, more particularly, to a scanner incorporated into a light pipe system that includes a light-shaping variable diffuser. Background technique [0002] Currently, common scanning systems, such as barcode recognition systems, use point light sources such as light-emitting diodes (LEDs) for illumination, and record by point. Such systems typically include multiple barcode illuminators that scan along a string of barcodes. Such a bar code illuminator is used in a housing containing a scanning head which is reciprocally scanned over a bar code before it is processed by the detection means in said bar code recognition system. Alternatively, the bar code illuminator can be placed in a fixture, and the bar code itself is reciprocated past the bar code illuminator before said detection means processes said bar code. [0003] Unfortunately, such barcode illuminators require bulky housings and fixtures. In the c...

Claims

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Application Information

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IPC IPC(8): G02B27/00G03H1/04G03H1/22G06K7/10G06K19/06G06V30/224H01L33/00H01L33/58
CPCG06K7/10732G06K7/10742G06K7/10722G06K7/10
Inventor 加金德拉·D·萨万特阿巴斯·侯赛尼里克·L·希恩汪三壮
Owner LUMINIT
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