CN100372680C

CN100372680C - Dual Wavelength light-emitting source for chromatography printing register sensor

Info

Publication number: CN100372680C
Application number: CNB2006100819066A
Authority: CN
Inventors: 刘思贤; 刘思麟; 刘文启
Original assignee: WEILUN SCIENCE AND TECHNOLOGY Co Ltd
Current assignee: WEILUN SCIENCE AND TECHNOLOGY Co Ltd
Priority date: 2006-05-10
Filing date: 2006-05-10
Publication date: 2008-03-05
Anticipated expiration: 2026-05-10
Also published as: CN1850511A

Abstract

The present invention relates to a dual wavelength light emitting source for a chromatography printing register sensor, which belongs to the printing class. The register sensor is mainly composed of a pair of light emitting sources parted with a fixed range, and light ring pads thereof. The reflection of a convex glass and a single prismatic sheet which is obliquely arranged at the central range at the inner side of the register sensor is matched so that the dual luminous sources are led to an external lens of the register sensor and are emitted. When two pairs of dual light sources are emitted to color codes respectively, an obvious reflectance ratio difference is produced between each of the color codes and a piece of ground color paper. The reflected light rays penetrate back through the external lens and are sent to a detecting unit, and a detecting circuit of the detecting unit detects the strength of the reflected light rays. The present invention has the advantages that the present invention can effectively avoid the defect that a single light source can not capture a specific color, and the present invention can easily capture the color on any color code so as to carry out chromaticity printing verification, and cause the range of application of the spectral designs of dual light sources to be greatly raised, so the practicability is strong.

Description

Apply to the dual wavelength light emitting source of chromaticity printing to the version sensor

Technical field

The present invention relates to print class, particularly a kind of dual wavelength light emitting source that applies to chromaticity printing to the version sensor refers to a kind of technology to the version sensor to colour code tool high sensitivity when applying to chromaticity printing especially.

Background technology

As everyone knows, when chromaticity printing, CMYB is its basic colors, wherein C is blue (Cyan), M is red (Magenta), Y is yellow (Yellow), B is black (Black), in order follow-up printed patterns accurately to be overlapped on the printed patterns before being imprinted on, then the function to the version sensor then is to want to detect the color mark of printing before and the color mark of this printing simultaneously, and the electric signal between these 2 marks is sent to the error of removing to be converted into the distance that detects between 2 marks and industrial standard 20mm in the controller of printing machine and what is arranged actually, so we are when selecting that version sensor inside is used for the spectrum of light emitting source, we require this light source that is sent by sensor must be to C certainly, M, the Y mark all will have tangible reaction;

But, with general to the version sensor if when using single light source, it is main that the light emitting source that is sent mostly is white light (White LED), such the phenomenon of difficulty can take place some color marks in C, M, Y three looks are detected when the version sensor is used, and has formed the unsettled situation of version; Moreover, if with other spectroscopic light sources be bound to take place a certain colour code can't be certain detect and cause version sensor detecting function influenced, and then to the version sensor also can't be arbitrarily flexibly, the detecting of convenient and practicality, need be improved.

Summary of the invention

The object of the present invention is to provide a kind of dual wavelength light emitting source that applies to chromaticity printing to the version sensor, solved prior art to version unstable and to the version sensor can't be arbitrarily flexibly, problems such as convenient and detecting of practicality.

Technical scheme of the present invention is: to the version sensor mainly is two light emitting source LED lamps and its aperture pad by a pair of fixed distance, collocation convex lens and reflection to the tilting single light splitting piece of the inboard middle section of version sensor cause to the version sensor two light sources to penetrating in the outer lens; This establishes an extinction sheet to ora terminalis on the version sensor, partly consequently produces interference detection results by SKIN RETURN with the light source that prevents two light source transmission light splitting pieces; Beat respectively on colour code after two pairs of two light sources penetrate, produce tangible difference in reflectivity between color mark and background color paper, light reflected is returned on detecting unit through outer lens is worn, and carries out the reflection ray intensity detection by its circuit for detecting; The spectrum of two light sources is set, and mainly is the requirement with the tool complementary effect, and the synthetic light that produces the two light sources that sent by sensor all can have obvious induction to the different colours mark;

This mainly is two light sources with the complementary spectral effects of tool to the version sensor, under mutually supporting, can whether have higher detecting ability for the existence that colour code is sensed in detection, the signal of the spectrum that reflects back when two light sources of this tool complementarity are beaten simultaneously on colour code, beat the signal that on original ground paper, is reflected back with two light sources and have under the tangible gap, can when chromaticity printing, detect this two colour code and whether meet the industrial standard of 20mm apart;

Two light sources of this complementarity spectral effects can be the collocation between gold-tinted light source and the blue light source, so, then the gold-tinted light source of this pair light source is in capturing single color mark that detects difficulty with blue light source in case of necessity, in like manner, the blue light source of this pair light source also can capture single color mark that detects difficulty with the gold-tinted light source in case of necessity, thereby this gold-tinted light source and the mutual complementarity of blue light source, all color marks have almost been contained in the combination that forms this two light source;

In addition, the present invention is based on above-mentioned gold-tinted and blue light source if still can have any problem when being used for the detection of fluorescent ink mark, when so the fluorescent printing ink indicia detects, also can use the collocation of ultraviolet light source and C (Cyan) light source, so, then C (Cyan) light source is not only originally in C (Cyan), M (Magenta), in Y (Yellow) three looks except C (Cyan) colour code, for M (Magenta), Y (Yellow) two colour codes have detectability equally, so, whether then make has the detection of 20mm spacing to become feasible for detecting between fluorized marking and other colour codes, in addition because C (Cyan) light source is a visible light, just the speciality that can utilize this visible light to see when adjusting the distance of reaction of sensor is done accurate distance and is adjusted, this is that private ultraviolet light source definitely is beyond one's reach, because ultraviolet source has only faint perception in common people's vision.

The invention has the advantages that: effectively avoid the shortcoming that single light source can't be caught for certain particular color, beat simultaneously on color-coded, can catch color on any colour code easily to carry out the check of chromaticity printing with two light sources of tool complementarity; Two light sources can be ultraviolet ray and combine with C (Cyan) light source and same extensible the utilization to fluorescent printing printing ink detection selection, and the design of ordering about two light source light spectrums significantly promotes its range of application, and is practical.

Description of drawings:

Fig. 1 is the schematic top plan view after the version sensor is taken apart of the present invention:

Fig. 2 is the light source schematic diagram that the version sensor is got of the present invention;

Fig. 3 is C of the present invention (Cyan), M (Magenta), Y (Yellow) and R (Red), G (Green), B (Blue) the distribution explanation schematic diagram on chromaticity diagram:

Fig. 4 is the embodiments of the invention schematic diagram.

The specific embodiment:

As accompanying drawing 1 to shown in the accompanying drawing 4, the present invention mainly is by a pair of two light emitting source LED lamps 10 at a distance of 20mm to

version sensor

1,11 and relevant control circuit, first pair of light emitting source LED lamp 10 and second pair of light emitting source LED lamp 11 front end respectively are equipped with an aperture pad 100,110 to prevent the mutual interference of two groups of light phases, aperture pad 100,110 the place aheads are then divided and are equipped with

convex lens

12,13, and this has a single light splitting piece 14 to version sensor 1 inboard middle section miter angle is tilting, can be by light splitting piece 14 with first and second pair light emitting source LED lamp 10, the 11 two light sources 2 that sent reflex to version sensor 1 to

outer lens

16,17 backs are penetrated, this establishes an extinction sheet 15 to ora terminalis on the version sensor 1, to prevent first, two pairs of light emitting source LED lamps 10, the light source that light splitting piece 14 is crossed in 11 two light sources 2 transmissions of sending partly by SKIN RETURN so that produce interference detection results, this has then installed two groups of independently circuit for detecting 18 to version sensor 1 end edge, and these two groups independently circuit for detecting 18 can be respectively independently examine and determine at the reflection ray intensity that receives separately;

And the spectrum of two light sources 2 is set, and mainly being must all will have tangible spectral wavelength sensing reaction to C (Cyan), M (Magenta), Y (Yellow) sign with the two light sources that require to be sent by sensor; As shown in Figure 3, promptly be C (Cyan), M (Magenta), Y (Yellow) and R (Red), G (Green), the distribution explanation of B (Blue) on chromaticity diagram, wherein C (Cyan) contains the composition of G (Green) and B (Blue) each half, Y (Yellow) contains the composition of G (Green) and R (Red) each half, and M (Magenta) contains the composition of B (Blue) and R (Red) each half; And LED light emitting source commonly used all is near the light the emission specific wavelength, so amber light Y-LED only can contain near the wave spectrum in very narrow zone Y (Yellow) point, and blue lamp B-LED is the wave spectrum that only contains near very narrow zone B (Blue) point equally, therefore almost have no to occur simultaneously and to say at the spectrum that can clearly understand blue lamp B-LED in the drawings and Y (Yellow) look at opposite side, therefore the light that sends of blue lamp B-LED very low of reflectivity under Y (Yellow) look, and amber light Y-LED, Y (Yellow) colour code is next can have the height detection ability really for mutual being combined in of blue lamp B-LED;

And the spectrum of amber light Y-LED to C (Cyan) and M (Magenta) all at adjacent side, so the spectrum of amber light Y-LED only has part to occur simultaneously to C and M, the light that amber light Y-LED sends has to a certain extent on C and M mark and is absorbed, so amber light Y-LED, the mutual combination of blue lamp B-LED is for C (Cyan), M (Magenta) look also is to have the height detection ability, therefore, just can be after the combination of light sources of amber light Y-LED and blue lamp B-LED at C (Cyan), M (Magenta), on the Y (Yellow) etc. color-coded 30 and have tangible difference in reflectivity between the background color paper 3, thereby the combination of the two light sources of amber light Y-LED and blue lamp B-LED has been described, be version to be used go up best light emitting source;

When the present invention applies to fluorescent printing printing ink, it also can be the collocation between ultraviolet light source and C (Cyan) light source, C (Cyan) light source is at M (Magenta), have being absorbed to a certain degree under Y (Yellow) two colour codes, when ultraviolet light source shines the fluorescent printing mark, can make that reflectivity becomes big because of the effect of fluorescence, tool own detects ability so the combination of utilization ultraviolet light source and C (Cyan) light source not only can be reflected major part color-coded 30, ultraviolet light source more can be detected at the fluorescent ink mark that visible lamp can't be detected, and the luminous focus point that also can utilize simultaneously C (Cyan) light source that people can see is as the reference of sensing with the distance of reaction adjustment;

As shown in Figure 4, the present invention mainly is by first, two pairs of light emitting

source LED lamps

10,11 send first pair of light source 20 and second pair of light source 21 process aperture pad 100,110, see through convex lens 12 again, 13 dozens on single light splitting piece 14, pass outer lens 16 via reflection, 17 backs are penetrated, distance between the first pair of light source 20 and the second pair of light source 21 is same as first and second pair light emitting source LED lamp 10, the distance of 11 settings all is 20mm, when first pair of light source 20 and second pair of light source 21 are beaten respectively on colour code 30, because light source tool complementary effect own, just can be after the combination of light sources of amber light Y-LED and blue lamp B-LED at C (Cyan), M (Magenta), produce tangible difference in reflectivity on the Y (Yellow) etc. color-coded 30 and between the background color paper 3, light reflected 20a, the 21a warp is to

outer lens

16,17 wear and return on circuit for detecting 18, and are carried out the detection of reflection ray intensity by its circuit for detecting.

Claims

1. dual wavelength light emitting source that applies to chromaticity printing to the version sensor, it is characterized in that: to the version sensor mainly is two light emitting source LED lamps and its aperture pad by a pair of fixed distance, collocation convex lens and reflection to the tilting single light splitting piece of the inboard middle section of version sensor cause to the version sensor two light sources to penetrating in the outer lens; Beat respectively on colour code after two pairs of two light sources penetrate, produce tangible difference in reflectivity between color mark and background color paper, light reflected is returned on detecting unit through outer lens is worn, and carries out the reflection ray intensity detection by its circuit for detecting; The spectrum of two light sources is set, and mainly is the requirement with the tool complementary effect, and the synthetic light that produces the two light sources that sent by sensor all can have obvious induction to the different colours mark.

2. a kind of dual wavelength light emitting source that applies to chromaticity printing to the version sensor according to claim 1 is characterized in that: said pair of light source is the collocation of the blue light source and the gold-tinted light source of tool spectrum complementary effect.

3. a kind of dual wavelength light emitting source that applies to chromaticity printing to the version sensor according to claim 1, it is characterized in that: when it applied to fluorescent printing printing ink, two light sources were the collocation between ultraviolet light source and the blue light source.

4. a kind of dual wavelength light emitting source that applies to chromaticity printing to the version sensor according to claim 1 is characterized in that: said ora terminalis on the version sensor is established an extinction sheet.