CN218767747U - Novel lamp box with uniform illumination - Google Patents

Abstract

The utility model discloses a novel even illuminance lamp house. The lamp box frame is arranged on the lamp box bottom plate, the camera support beam can be horizontally and translationally installed in the center of the top of the lamp box frame, the vertical camera component is installed on the camera support beam, the two strip-shaped light source components are respectively located on two sides of the lamp box frame and are installed in a hinged mode, the two strip-shaped light source components are symmetrically arranged on two sides of the lamp box frame by taking the central vertical surface of the lamp box frame as the central plane, and the shading cloth is sleeved on the lamp box frame. The utility model discloses an inside illumination field illuminance degree of consistency is high, and the inside illumination field is adjustable, can completely cut off the influence of external illumination to the lamp house inside illumination field.

Description

Novel lamp box with uniform illumination

Technical Field

The utility model belongs to the technical field of lighting apparatus and specifically relates to a lamps and lanterns box has related to one kind and has been used for building the lighting apparatus in high illuminance degree of consistency illumination field for carry out the colour comparison that requires higher to the illumination homogeneity, the sample illumination when the operation of checking colours.

Background

This even illuminance lamp house is applied to colorimetric sensor research and development in-process. By creating an illumination field with uniform illumination, the color difference of the readings of the colorimetric sensors caused by the illumination difference is eliminated. The lamp box with uniform illumination can also be used for operations such as color matching and sample making, color difference identification and the like in other industries such as textile, printing and dyeing and the like. This even illuminance lamp house can make the sample of placing in the lamp house all be in under the same lighting standard, through built-in camera, can record the colour of sample under the same lighting standard again and be R, G, B passageway reading, with the colour numeralization of sample, the colour difference of different samples is proofreaded to the accuracy, records the colour change of sample.

The existing color matching lamp box, as shown in fig. 1, is usually illuminated by a fluorescent tube placed on top. The operator places the material to be corrected in the bottom of the box body, and then starts the color correction lamp box to start correction.

The above prior art solutions have the following drawbacks:

1. the illumination field in the box body can not be regulated and controlled, a method for verifying the uniformity of the illumination field in the box body is not provided, the possibility of nonuniform illumination field exists, and the nonuniform illumination field can cause color difference when a sample is placed in the box body.

2. There is no equipment for recording the color of the sample and comparing the color difference of the sample, and the operator needs other external recording devices or carries out color comparison and color matching operation by naked eyes.

3. The opening of the lamp box causes the box body not to be closed, the illumination of the external environment influences the illumination field in the lamp box, so that the illumination distribution in the lamp box is uneven, and the color difference of the sample occurs. Therefore, the utility model provides a novel even illuminance lamp house for solve prior art scheme's above-mentioned defect.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims at providing an even illuminance lamp house for solve prior art scheme's above-mentioned defect, realize the illumination field of high illuminance degree of consistency.

The utility model aims at realizing through the following technical scheme:

comprises a lamp box frame arranged on a lamp box bottom plate;

the camera support beam can be horizontally and translationally arranged in the center of the top of the lamp box frame;

comprises a vertical camera component, which is arranged on a camera support beam;

the lamp box comprises two strip-shaped light source assemblies, wherein the two strip-shaped light source assemblies are respectively positioned at two sides of a lamp box frame and are hinged, and the two strip-shaped light source assemblies are symmetrically arranged at two sides by taking a central vertical surface of the lamp box frame as a central surface;

comprises shading cloth sleeved on a lamp box frame.

Each strip-shaped light source component comprises a strip-shaped area light source, an adjustable angle hinge, a turnbuckle and a light source support beam; the light source support beam can be vertically installed on the side part of the lamp box frame in a sliding and height adjusting mode, and the strip-shaped surface light source is installed on the light source support beam in a hinged mode through the angle-adjustable hinge and the elastic bolt.

The strip-shaped surface light source is internally provided with a plurality of rows of LED lamp beads, and the surface of the light source is covered with a light-diffusing plate.

The camera support is horizontally movably arranged on the camera support beam along the camera support beam, the camera can be vertically arranged on the camera support in a lifting way, and a camera lens of the camera is arranged downwards.

But camera install in camera support through rack slider oscilaltion, specifically do: the camera support is provided with a strip-shaped groove in the vertical direction, a sliding block is fixedly arranged on the side face of the camera, the sliding block is embedded in the strip-shaped groove along the vertical direction and slides to form a sliding pair, the sliding block is arranged in a rack structure on one side close to the strip-shaped groove, a gear is installed inside the camera support in a cross-connection mode, the gear and the rack are connected in a meshing mode to form a gear-rack pair, an adjusting knob is arranged outside the camera support, and the adjusting knob and the gear are coaxially and synchronously connected.

The shading cloth is light-tight black cloth, and the inner side of the shading cloth is coated with an anti-reflection coating.

The utility model has the advantages that:

1. the internal illumination field has high illumination uniformity and is adjustable.

2. The camera is integrated at the top of the lamp box, so that the uniformity of the illumination field in the lamp box can be verified, and the color R, G and B channel readings of the sample can be recorded.

3. The lamp box is surrounded by shading cloth, so that the influence of external illumination on the illumination field in the lamp box can be isolated.

Drawings

FIG. 1 is a general block diagram of the present invention;

fig. 2 is a schematic view of the hinge mounting of a strip-shaped surface light source;

FIG. 3 is a schematic view of the light source support beam being mounted for elevation;

FIG. 4 is a schematic view of a camera lift installation;

FIG. 5 is a schematic view of the camera mount beam movement;

FIG. 6 is a graph of the spatial X-Y distribution of illumination of a single strip light source;

FIG. 7 is a graph of the distribution of illumination of a single strip light source along the X-Y axis of space;

FIG. 8 is a schematic view showing the superposition of illumination fields of two strip-shaped light sources;

FIG. 9 is a schematic view of the illumination after two strip-shaped light sources are stacked;

FIG. 10 is a schematic view of a light shield;

FIG. 11 is a photograph of an experimental test white color chart and a sampling area;

fig. 12 is a graph of illuminance for each area of the experimental test.

In the figure: 1. the camera comprises a strip-shaped surface light source, 2 degrees of adjustable angle hinges, 3 degrees of elastic bolts, 4 degrees of light source support beams, 5 degrees of a lamp box frame, 6 degrees of a lamp box bottom plate, 7 degrees of camera support beams, 8 degrees of a camera support, 9 degrees of rack sliders, 10 degrees of adjusting knobs, 11 degrees of a camera, 12 degrees of a camera lens and 13 degrees of shading cloth.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1, the device comprises a strip-shaped surface light source 1, an adjustable angle hinge 2, a turnbuckle 3, a light source support beam 4, a lamp box frame 5, a lamp box bottom plate 6, a camera support beam 7, a camera support 8, a rack slider 9, an adjusting knob 10, a camera 11, a camera lens 12 and shading cloth 13.

Comprises a lamp box frame 5 arranged on a lamp box bottom plate 6;

comprises a camera support beam 7 which can be horizontally and translationally arranged at the center of the top of the lamp box frame 5;

comprises a vertical camera component, which is arranged on a camera support beam 7;

the lamp box comprises two strip-shaped light source assemblies, wherein the two strip-shaped light source assemblies are respectively positioned at two sides of a lamp box frame 5 and are hinged, and the two strip-shaped light source assemblies are symmetrically arranged at two sides by taking a central vertical plane of the lamp box frame 5 as a central plane;

the shading cloth 13 is sleeved on the lamp box frame 5, so that a black box space is formed inside, and the vertical camera component and the strip-shaped light source component are both positioned in the black box space.

Each strip-shaped light source component comprises a strip-shaped surface light source 1, an adjustable angle hinge 2, an elastic bolt 3 and a light source support beam 4; the light source support beam 4 can be vertically slidably adjusted and highly mounted on the side part of the lamp box frame 5, the two sides of the lamp box frame 5 are both provided with the light source support beam 4 of a strip-shaped light source assembly, and the strip-shaped surface light source 1 is hinged to the light source support beam 4 through an angle-adjustable hinge 2 and a tightening bolt 3.

The utility model discloses a light source support roof beam 4 is installed on lamp house frame 5 to the height of adjustable distance lamp house bottom plate from top to bottom. The height of the strip-shaped surface light source can be adjusted by adjusting the height of the light source support beam up and down.

The utility model provides a light source is a pair of white strip area light source that hangs on light source support roof beam. The strip-shaped surface light source 1 is internally provided with a plurality of rows of LED lamp beads, and the surface of the light source is covered with a light-diffusing plate. The strip-shaped light source has a wider and more uniform illumination distribution in the longitudinal direction of the light source due to the longer length. The light flux of the strip light source is diffused by the diffusion of the rows of lamp beads and the light diffusion plate, so that the strip light source has wider illumination distribution in the transverse direction.

The utility model discloses used strip area source 1 links to each other with the light source support roof beam through adjustable angle hinge, through the angle of adjusting adjustable angle hinge, the angle of shining of adjustable strip area source. The adjustable angle hinge accessible rotating bolt realizes the elasticity of hinge, and the hinge angle is adjustable in the relaxed state, and fastening state hinge angle will be fixed.

The camera support 8 is horizontally movably mounted on the camera support beam 7 along the camera support beam 7, the camera 11 is vertically liftably mounted on the camera support 8, and the camera lens 12 of the camera 11 is disposed downward.

The utility model discloses install camera support roof beam 7 at the lamp house top, horizontal adjusting position can be controlled to camera support roof beam 7. The camera support is arranged on the camera support beam and can be adjusted forwards and backwards along the direction of the camera support beam. The camera support is provided with an adjusting slide rail, and the height of the camera support can be adjusted. The camera bracket is provided with a camera. Through the left and right movement of the camera support beam, the front and back movement of the camera support and the up and down movement of the adjusting slide rail, the omnidirectional adjustment of the position of the camera at the top of the lamp box can be realized, and the sample is ensured to fall in the center of the visual field of the camera.

But camera 11 installs in camera support 8 through rack slider 9 oscilaltion, specifically is: the strip-shaped groove of vertical direction is seted up to camera support 8, the strip-shaped groove can be the dovetail, the fixed slider that is equipped with in camera 11 side, the slider inlays along vertical direction and adorns and slide in the strip-shaped groove and form the slip pair, the slider sets up to the rack structure in the one side that is close to the strip-shaped groove, the gear is installed to the inside handing-over of camera support 8, gear and rack toothing connect and form the rack and pinion pair, camera support 8 is equipped with adjust knob 10 outward, adjust knob 10 and gear are through the coaxial synchronous connection of the axle of wearing to establish. Therefore, the adjusting knob 10 is rotated to drive the gear, and further the camera 11 and the sliding block on the side surface thereof are driven to move up and down under the limit of the gear rack pair and the sliding pair.

The utility model discloses used camera lens 12 is for using short focus wide-angle lens, and camera lens frame is far greater than camera light sensing element frame. The short-focus wide-angle lens can increase the light incoming amount of the lens edge; the frame of the camera photosensitive element is far smaller than that of the camera lens, so that the photosensitive element only receives the information of the most uniform illumination part of the central part of the camera lens, the dark angle effect of camera imaging is reduced, and the reading errors of the R, G and B values of the sample caused by the camera are reduced.

The utility model discloses shading cloth is light tight black cloth, and the inboard coating of shading cloth has the antireflection coating. The influence of external illumination on the illumination field in the lamp box is blocked, and the influence of the internal reflection of the black cloth on the illumination field in the lamp box is reduced.

In specific implementation, the lamp box frame is completely black through anodic oxidation treatment, so that the influence of the reflection of the lamp box frame on an illumination field in the lamp box can be reduced.

The utility model discloses use a white standard to the colour chip in the debugging process, will place in lamp house bottom center to the colour chip, adjust the camera position, the focus makes to the clear camera field of vision center that falls into of colour chip. And adjusting the irradiation angles of the pair of strip-shaped surface light sources, and simultaneously reading the chromatic aberration of the R, G and B values of each area on the surface of the color card from the photographing result of the camera. This is used for the initial debugging before the lamp house is used, ensures the illuminance uniformity of the illumination field in the lamp house.

The embodiment of the utility model is as follows:

1. angle adjustment of strip-shaped surface light source 1

As shown in fig. 2, a strip-shaped surface light source 1 is connected to a light source support beam 4 through an angle-adjustable hinge 2. The elastic bolt 3 is a fastening bolt of the angle-adjustable hinge 2, the angle-adjustable hinge 2 can be loosened by rotating the elastic bolt 3 anticlockwise, the angle-adjustable hinge 2 becomes movable at the moment, and the hinge angle can be adjusted. The adjustable angle hinge 2 can be locked by rotating the tightening bolt 3 clockwise, and the angle of the adjustable angle hinge 2 can not be adjusted at the moment. The irradiation angle of the strip-shaped surface light source 1 to the lamp box bottom plate 6 can be adjusted through the operation.

2. Height adjustment of strip-shaped area light source 1

As shown in fig. 3, a strip-shaped surface light source 1 is connected with a light source support beam 4 through an angle-adjustable hinge 2. The light source support beam 4 is mounted on the light box frame 5, and the mounting position can be adjusted up and down. The distance between the strip-shaped surface light source 1 and the lamp box bottom plate 6 can be adjusted through the operation.

3. Position adjustment of camera 11

As shown in fig. 4 and 5, the camera 11 is mounted on the rack slider 9, and the rack slider 9 can be adjusted to move up and down by rotating the adjusting knob 10, so as to drive the camera 11 to move along the Z-axis direction of fig. 3. The rack slider is mounted on the camera mount 8, while the camera mount 8 is mounted on the camera mount beam 7, movable in the Y-axis direction of fig. 3. The camera support beam 7 is mounted on the lamp box frame 5, and the mounting position can be adjusted along the X-axis direction of the attached figure 3. The X-Y-Z three-axis position of the camera 5 can be adjusted within the movable range by the above operation.

4. Construction of uniform illumination field

As shown in fig. 6-9, the illumination field formed by the illumination of the single strip-shaped surface light source 1 can be seen as a rectangle, the distribution of the illuminance along the space X-Y axis is shown in fig. 6, and the change of the illuminance along the X-axis curve and the Y-axis curve is shown in fig. 7. Along with the distribution of the Y-axis illumination, the strip-shaped area light source 1 has a relatively large length and width, so that the distribution curve is relatively gentle, and the distribution uniformity is relatively high. Along with the X-axis illumination distribution, the strip-shaped surface light source is narrower in width, so that the illumination distribution is more concentrated, and the brightness is higher as the strip-shaped surface light source is closer to the illumination center.

The utility model discloses a select the longer strip area light source 1 of length, promote the homogeneity of illumination curve along the Y axle. By means of the pair of strip-shaped surface light sources 1, the positions and the illumination angles of the strip-shaped surface light sources are adjusted, so that the illumination areas of the two strip-shaped surface light sources are overlapped as shown in the figure 8, and the uniformity of an illumination curve along the X axis is improved. As shown in fig. 8, the illumination regions of the two strip-shaped surface light sources 1 overlap each other, but are offset from each other in the X-axis direction. Because the illumination fields formed by the two strip-shaped surface light sources 1 are overlapped, the illumination curve distribution along the X-axis direction is also overlapped, the original X-axis illumination distribution is relatively concentrated, and because the illumination curves of the two strip-shaped surface light sources 1 are overlapped in a staggered peak mode, a wider and smoother illumination curve is formed as shown in figure 9.

5. Use of shading cloth

The shading cloth is covered on the outer frame of the whole device as shown in fig. 10, and is used for isolating the influence of external stray light on the uniformity of internal illumination.

6. Actual effect of patent

In an actual experiment, a white colorimetric plate with the size of 128mmX86mm is used as a sample and is placed in the center of a lamp box floor, an adjustable angle hinge is adjusted to adjust the irradiation angle of a strip-shaped surface light source, and the white colorimetric plate is photographed through a camera.

The color values (R, G, B values of the photograph) of the respective areas of the surface of the white colorimetric plate are quantitatively compared by a parameter E. The calculation method of the parameter E comprises the following steps:

the photographed picture and the region division are shown in fig. 11, and fig. 12 can be obtained by averaging and comparing the E values of each pixel point in each region, wherein the maximum value of the parameter E is 201.3, and the minimum value is 196.2. The maximum illumination difference in the whole sample white color shade is 2.3%

It is visible through implementing the verification, the utility model discloses the illuminance homogeneity of light source illumination is good under the device.

Claims (6)

1. The utility model provides a novel even illuminance lamp house which characterized in that:

comprises a lamp box frame (5) arranged on a lamp box bottom plate (6);

comprises a camera support beam (7) which can be horizontally and translationally arranged in the center of the top of a lamp box frame (5);

comprises a vertical camera component which is arranged on a camera support beam (7);

the lamp box comprises two strip-shaped light source assemblies, wherein the two strip-shaped light source assemblies are respectively positioned at two sides of a lamp box frame (5) and are hinged, and the two strip-shaped light source assemblies are symmetrically arranged at two sides by taking a central vertical surface of the lamp box frame (5) as a central surface;

comprises shading cloth (13) sleeved on the lamp box frame (5).

2. The novel lamp box with uniform illumination of claim 1, characterized in that:

each strip-shaped light source assembly comprises a strip-shaped surface light source (1), an angle-adjustable hinge (2), a turnbuckle (3) and a light source support beam (4); the light source support beam (4) can slide up and down and is installed on the side part of the lamp box frame (5) in a height-adjustable mode, and the strip-shaped surface light source (1) is installed on the light source support beam (4) in a hinged mode through the angle-adjustable hinge (2) and the elastic bolt (3).

3. The novel lamp box with uniform illumination of claim 2, characterized in that:

the strip-shaped surface light source (1) is internally provided with a plurality of rows of LED lamp beads, and the surface of the light source is covered with a light-diffusing plate.

4. The novel lamp box with uniform illumination of claim 1, characterized in that:

the camera support (8) is horizontally movably mounted on the camera support beam (7) along the camera support beam (7), the camera (11) is vertically installed on the camera support (8) in a lifting mode, and a camera lens (12) of the camera (11) is arranged downwards.

5. The novel lamp box with uniform illumination of claim 1, characterized in that:

but camera (11) install in camera support (8) through rack slider (9) oscilaltion, specifically do: the camera support (8) is provided with a strip-shaped groove in the vertical direction, a sliding block is fixedly arranged on the side face of the camera (11), the sliding block is embedded in the strip-shaped groove along the vertical direction to form a sliding pair in a sliding mode, the sliding block is arranged in a rack structure on one side close to the strip-shaped groove, gears are installed inside the camera support (8) in a cross-connection mode, the gears and the racks are connected to form a gear-rack pair, an adjusting knob (10) is arranged outside the camera support (8), and the adjusting knob (10) is coaxially and synchronously connected with the gears.

6. The novel lamp box with uniform illumination of claim 1, characterized in that:

the shading cloth is light-tight black cloth, and the inner side of the shading cloth is coated with an anti-reflection coating.

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