CN216433242U

CN216433242U - Novel illumination structure of color meter

Info

Publication number: CN216433242U
Application number: CN202123253485.XU
Authority: CN
Inventors: 苏朝阳; 费维刚
Original assignee: Shenzhen 3nh Technology Co ltd
Current assignee: Guangdong Sanenshi Intelligent Technology Co ltd
Priority date: 2021-12-22
Filing date: 2021-12-22
Publication date: 2022-05-03
Anticipated expiration: 2031-12-22

Abstract

The utility model discloses a novel lighting structure of a color measuring instrument, which comprises a lighting shell; the middle inside the illumination shell is provided with an annular integrator along the circumferential direction, and the illumination shell is also internally provided with a plurality of light splitting channels communicated with the annular integrator; the bottom of the illumination shell is provided with a light through hole communicated with the light splitting channels, and the interior of the illumination shell is positioned above the light splitting channels and is also sequentially provided with a light path receiver and a photoelectric detector; the outer wall of the middle part of the illumination shell is also provided with an annular luminous source at the position corresponding to the annular integrator; the utility model discloses abandoned bulky, to the higher integral hemisphere device of illumination energy requirement under the condition of same illumination brightness, adopted annular integrator, under the same size, because be the inside volume of annular integrator and far be less than half integrating sphere for under the same illumination brightness condition, lower to the energy demand of light source, be favorable to reduce cost, reduce the volume, more be favorable to realizing portablely.

Description

Novel illumination structure of color meter

Technical Field

The utility model relates to a color meter especially relates to a novel lighting structure of color meter.

Background

In the modern color measurement and control field, the application of color measuring instruments is more and more common, and compared with human eyes, the color measuring instruments have the advantages of high measurement speed, objective result, easy digitization and standardization, and play a significant role in the color control and transmission process. However, to solve the problem of data consistency between different countries and different instrument manufacturers, CIE15 specifies several optical geometries, instruments with the same optical geometry should theoretically have consistent data, and in the optical geometry specified by CIE15, the 45/0 geometry is an important component, and even this geometry has become the standard for color measurement in several industries.

In a common color photometer with 45/0 optical geometric conditions on the market, 45-degree illumination is mainly divided into three types, the first type is unidirectional illumination, and the measurement result of a sample with textures under different texture orientations under the illumination geometric conditions is greatly different; the second is to adopt the optical fiber bundle to illuminate, the optical fiber bundle is a punctiform light source and is evenly distributed along the periphery, the illumination condition can greatly reduce the influence of the texture on the measurement result, however, the optical fiber illumination structure is complex and is influenced by the NA value of the optical fiber, and the light energy utilization rate is not as good as possible; thirdly, a semi-integrating sphere is adopted for illumination, an annular slit is formed at the bottom of the integrating sphere, the included angle between the center line of the annular slit and the center of the sample is 45 degrees, and 45-degree annular illumination is formed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a novel illumination structure of color meter to solve above-mentioned problem.

In order to realize the purpose, the following technical scheme is adopted:

a novel lighting structure of a color photometer comprises a lighting shell; the middle inside the illumination shell is provided with an annular integrator along the circumferential direction, and the illumination shell is also internally provided with a plurality of light splitting channels communicated with the annular integrator; the bottom of the illumination shell is provided with a light through hole communicated with the light splitting channels, and the interior of the illumination shell is positioned above the light splitting channels and is also sequentially provided with a light path receiver and a photoelectric detector; the outer wall of the middle part of the illumination shell is also provided with an annular luminous source at the position corresponding to the annular integrator; the annular integrator is used for mixing light beams emitted by the annular luminous source and dividing the light beams into a plurality of parts through a plurality of light splitting channels so as to irradiate different positions on the surface of a detected product; the light path receiver is used for receiving the light beam reflected by the surface of the product to be measured and focusing the light beam to the surface of the photoelectric detector so as to measure the light energy.

Further, the annular integrator comprises an annular light mixing groove arranged in the middle of the inner part of the illumination shell, and lambertian reflecting materials sprayed on the inner wall of the annular light mixing groove and used for reflecting light beams.

Further, the light splitting channel comprises a first branch channel which is obliquely arranged in the illumination shell and communicated with the annular integrator, and a second branch channel which is horizontally arranged in the illumination shell and positioned right below the light path receiver.

Furthermore, the annular luminous source comprises an annular aluminum substrate arranged on the illumination shell and a plurality of LED lamps arranged on the annular aluminum substrate.

Further, the LED lamp is a white LED lamp with blue light enhancement.

Adopt above-mentioned scheme, the beneficial effects of the utility model are that:

1) an integral hemisphere device which is large in size and has higher requirement on illumination energy under the condition of the same illumination brightness is abandoned, an annular integrator is adopted, and under the condition of the same size, because the volume inside the annular integrator is far smaller than that of a half integrating sphere, the energy requirement on a light source is lower under the condition of the same illumination brightness, the cost is reduced, the volume is reduced, and the portability is realized;

2) the light splitting channels are arranged, so that the light beam can be split into a plurality of parts to carry out combined illumination on the surface of a product to be measured, and under the illumination condition, the tolerance requirement of an illumination angle is met, and the requirement of an instrument on a large measurement caliber is also met;

3) the light beam is divided into a plurality of independent light sources through the light splitting channel, so that different areas of the surface of a detected product from the center to the edge are respectively illuminated by the light sources, the difference of illumination angles of the center area and the edge area of the sample can be effectively reduced, and the related standard is met.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a diagram illustrating a conventional illumination angle;

fig. 3 is a schematic view of the illumination angle of the present invention;

wherein the figures identify the description:

1-an illumination housing; 2-a ring integrator;

3-a light splitting channel; 4-optical path receiver;

5-a photodetector; 6-ring-shaped luminous source;

7-a product to be tested; 31 — a first branching channel;

32-second branch channel.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1 to 3, the present invention provides a novel illumination structure of a color meter, which comprises an illumination housing 1; an annular integrator 2 is arranged in the middle of the inside of the illumination shell 1 along the circumferential direction of the illumination shell, and a plurality of light splitting channels 3 communicated with the annular integrator 2 are further formed in the illumination shell 1; the bottom of the illumination shell 1 is provided with a light through hole communicated with the light splitting channels 3, and the inside of the illumination shell 1, which is positioned above the light splitting channels 3, is also sequentially provided with a light path receiver 4 and a photoelectric detector 5; an annular luminous source 6 is also arranged at the position, corresponding to the annular integrator 2, of the outer wall of the middle part of the illumination shell 1; the annular integrator 2 is used for mixing light beams emitted by the annular luminous source 6 and dividing the light beams into a plurality of parts through the plurality of light splitting channels 3 so as to irradiate different positions on the surface of a detected product; the optical path receiver 4 is used for receiving the light beam reflected by the surface of the product to be measured and focusing the light beam on the surface of the photoelectric detector 5 to measure the light energy.

The annular integrator 2 comprises an annular light mixing groove arranged in the middle of the inside of the illumination shell 1 and a Lambertian reflecting material sprayed on the inner wall of the annular light mixing groove and used for reflecting light beams; the light splitting channel 3 comprises a first branch channel 31 obliquely arranged in the illumination shell 1 and communicated with the annular integrator 2, and a second branch channel 32 horizontally arranged in the illumination shell 1 and positioned right below the light path receiver 4; the annular luminous source 6 comprises an annular aluminum substrate arranged on the illumination shell 1 and a plurality of LED lamps arranged on the annular aluminum substrate; the LED lamp is a white light LED lamp with blue light enhancement.

The utility model discloses the theory of operation:

with reference to fig. 1 to 3, in the present embodiment, the lambertian reflective material sprayed on the inner wall of the annular light mixing groove may be barium sulfate, fumed magnesium oxide, polytetrafluoroethylene, or the like, and is used for reflecting the light beam; a black material (a material with low reflectivity) is further sprayed in the light splitting channel 3 to reduce the optical reflectance as much as possible and reduce the influence of stray light on measurement; a plurality of LED lamps are arranged on an annular aluminum substrate of the annular luminous source 6, and preferably white LED lamps with blue light enhancement are arranged to improve the illumination effect, and the number of the LED lamps can be flexibly configured according to the use requirement; this lighting structure has abandoned bulky, to the higher integral hemisphere device of illumination energy requirement under the condition of same illumination brightness, has adopted annular integrator 2, under the same size, because the volume that is annular integrator inside is far less than half integrating sphere for under the same illumination brightness condition, the energy demand to the light source is lower, is favorable to reduce cost, reduces the volume, more is favorable to realizing portablely.

Meanwhile, when the measurement aperture of the instrument is larger, the height of the illumination slit from the plane of the product to be measured 7 is limited by the total volume of the instrument, and when the measurement aperture is larger than the illumination slit, the field angle of the measurement aperture relative to the illumination slit is larger, and the tolerance requirement of the illumination angle in international standards cannot be met, so that a plurality of light splitting channels 3 are arranged, the light beam can be divided into a plurality of parts to carry out combined illumination on the surface of the product to be measured 7, and under the illumination condition, the tolerance requirement of the illumination angle is met, and the requirement of the instrument on the large measurement aperture is also met; in addition, in order to meet the tolerance of the illumination angle in the illumination geometry, the height of the light source cannot be too low, if the height of the light source is too low, the illumination angle difference between the center of the sample and the edge of the sample is large (as shown in fig. 2), and the illumination structure divides the light beam into a plurality of independent light sources through the light splitting channel 3, so that after different areas of the surface of the measured product from the center to the edge are respectively illuminated by the light sources, the difference of the illumination angles of the center area and the edge area of the sample can be effectively reduced (as shown in fig. 3), and the relevant standards are met, specifically:

the annular integrator 2 can mix light of different light sources, so that the light sources have consistent spectrum and uniform energy, the light splitting channel 3 can divide the light sources into a plurality of parts, different positions on the sample surface are illuminated by different light source slits, the inconsistency of the illumination angle of the sample surface is reduced to the greatest extent, the heights of the light source slits are smaller, and the overall height of the instrument is effectively reduced; the light path receiver 4 (including a receiving lens) is used for receiving a reflected light beam illuminated by the light source slit onto the sample surface, and the light energy reflected on the sample surface is collected on the surface of the photoelectric detector 5, so that the measurement of the light energy is completed.

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A novel lighting structure of a color photometer is characterized by comprising a lighting shell; an annular integrator is arranged in the middle of the inside of the illumination shell along the circumferential direction of the illumination shell, and a plurality of light splitting channels communicated with the annular integrator are further formed in the illumination shell; the bottom of the illumination shell is provided with a light through hole communicated with the light splitting channels, and a light path receiver and a photoelectric detector are sequentially arranged above the light splitting channels in the illumination shell; the outer wall of the middle part of the illumination shell is also provided with an annular luminous source at the position corresponding to the annular integrator; the annular integrator is used for mixing light beams emitted by the annular luminous source and dividing the light beams into a plurality of parts through a plurality of light splitting channels so as to irradiate different positions on the surface of a detected product; the light path receiver is used for receiving the light beam reflected by the surface of the product to be measured and focusing the light beam to the surface of the photoelectric detector so as to measure the light energy.

2. The novel illumination structure of the colorimeter according to claim 1, wherein the annular integrator comprises an annular light mixing groove opened in the middle inside the illumination housing, and a lambertian reflecting material for reflecting the light beam, which is sprayed on the inner wall of the annular light mixing groove.

3. The novel illumination structure of a colorimeter according to claim 1, wherein the light splitting channel includes a first branch channel obliquely opened inside the illumination housing and communicating with the ring integrator, and a second branch channel horizontally opened inside the illumination housing and located right below the optical path receiver.

4. The novel illumination structure of the colorimeter according to claim 1, wherein the ring-shaped light emitting source comprises a ring-shaped aluminum substrate mounted on the illumination housing, and a plurality of LED lamps mounted on the ring-shaped aluminum substrate.

5. The novel illumination structure of colorimeter according to claim 4 wherein said LED lamp is a white LED lamp with blue light enhancement.