CN215112182U - Moonlight simulation lamp box based on LED - Google Patents

Abstract

The invention discloses a moonlight simulation lamp box based on an LED (light emitting diode), which belongs to the technical field of indoor simulation light source instrument spectroscopy and comprises a box body, a light source group, an optical component, a heat dissipation device, a display screen and a light source control component, wherein the light source group in the lamp box comprises a plurality of monochromatic visible light LED light sources and near infrared LED light sources. The multiple monochromatic visible light LED light sources and the near-infrared LED light sources are provided with 33 low-power monochromatic LEDs, wherein 2 monochromatic LEDs with the main wavelength of 380 nm-399 nm are provided; 8 kinds of monochromatic LEDs with the dominant wavelength of 400-499 nm; 4 kinds of monochromatic LEDs with the dominant wavelength of 500-599 nm; 6 kinds of single-color LEDs with dominant wavelengths of 600 nm-699 nm; 4 kinds of single-color LEDs with dominant wavelengths of 700-799 nm; 5 kinds of single-color LEDs with the dominant wavelength of 800-899 nm; and the dominant wavelength is 4 monochromatic LEDs with the wavelength of 900-1000 nm. The moonlight spectrum is effectively simulated in a full-wave band manner by adopting various monochromatic visible light LED light sources and near-infrared LED light sources, and the moonlight spectrum simulation device has the characteristics of low energy consumption, long service life, high brightness and the like; compared with the existing LED moonlight simulation lamp box, the LED moonlight simulation lamp box has higher spectrum fitting degree.

Description

Moonlight simulation lamp box based on LED

Technical Field

The invention belongs to the technical field of indoor simulated light source instrument spectroscopy, and particularly relates to a moonlight simulated light box based on an LED.

Background

The low-light-level product is mainly researched and tested in a moonlight environment, however, moonlight is a natural light source, the controllability of the light source is not high, for example, the spectral irradiance distribution is seriously influenced by time and natural environment factors, and the light intensity cannot be changed manually. Therefore, the research and the test of the low-light products are basically carried out indoors through simulating light sources.

The research and test of the traditional low-light products in China adopt a standard A light source (2856K color temperature), the A light source emits light by a tungsten filament, and the tungsten filament has low luminous efficiency, short service life and the like compared with an LED. And the LED monochromaticity is good, and the moonlight spectrum can be effectively simulated by combining different LEDs.

Disclosure of Invention

The invention aims to provide a moonlight simulation lamp box based on an LED, which provides an environment with a spectrum closer to a moonlight spectrum and a stable and controllable light source for the research and test of low-light-level products indoors.

The technical scheme for realizing the purpose of the invention is as follows: a moonlight simulation lamp box based on LEDs comprises a box body, a light source group, an optical component, a heat dissipation device, a display screen and a light source control component, wherein the light source group in the lamp box comprises a plurality of monochromatic visible light LED light sources and a near-infrared LED light source.

The size of the light box body is 650-700 mmX (350-400) mmX (500-550) mm, the size of the light box body can simultaneously meet the illumination observation conditions of 0 degree/45 degrees (the light source illuminates in the normal direction of the surface of a sample and measures in the direction of 45 degrees of the normal) and 45 degrees/0 degrees (the light source illuminates in the direction of 45 degrees of the normal of the surface of the sample and measures in the direction of the normal), and the backgrounds of the outer wall and the inner wall of the light box body are light-absorbing medium gray, so that the influence of the background color of the light box body on detection and observation is prevented;

the light source group comprises 33 LEDs with main wavelengths between 380nm and 1000nm, is used for emitting light to cover visible light near infrared spectrum wave bands and simulate moonlight spectrum, and is partially detachable;

the optical component is composed of a conical light guide pipe and a cylindrical light guide pipe which are prepared by an ultra-efficient mirror reflector plate and used for fully mixing light emitted by the light source group and then uniformly emitting the light;

the heat dissipation device is used for cooling the light source group, so that equipment damage caused by overhigh temperature of the light source group is avoided;

and the display screen and the control component are used for controlling the on-off of the light source and the adjustment of the brightness.

The light source group simulates the actually measured moonlight spectrum in a mode of combining LED lamp beads of all wave bands based on a spectrum superposition principle; the optical component is composed of a conical light guide pipe and a cylindrical light guide pipe which are prepared by an ultra-efficient mirror reflector and used for fully mixing light emitted by the light source group and then uniformly emitting the light; the light source control component can control the number and the type of the LED lamp beads lighted by the light source group, so that the moonlight spectrum can be effectively simulated. The simulated light box spectrum range is 380 nm-1000 nm, the fitting precision of the simulated light box spectrum and the moonlight spectrum is judged to reach more than 90% through related indexes, the simulated environment is closer to a real environment, and an experimental condition that the spectrum is closer to the moonlight spectrum and the light source is stable and controllable is provided for the research and the test of low-light-level products.

Compared with the existing moonlight simulation lamp box, the moonlight simulation lamp box based on the LED provided by the invention has the characteristics of low energy consumption, long service life, high brightness and the like compared with the traditional light source by adopting various monochromatic visible light LED light sources and near-infrared LED light sources to effectively simulate moonlight spectrum in full wave bands; compared with the existing LED moonlight simulation lamp box, the LED moonlight simulation lamp box has higher spectrum fitting degree.

Drawings

FIG. 1 is a schematic structural diagram of a moonlight simulation light box based on LEDs;

FIG. 2 is a schematic view of an arrangement of light source modules of a LED-based moonlight simulation light box;

FIG. 3 is a schematic diagram of a single light source of an LED-based moonlight simulation light box;

FIG. 4 is a schematic view of an arrangement of LED light source internal lamps of an LED-based moonlight simulation light box;

FIG. 5 is a comparison graph of the simulated spectral curve of the LED-based moonlight simulation light box containing near infrared rays and the actually measured moonlight spectrum curve of the moonlight full;

wherein, 1, a box body; 2, a light source group; 3 an optical component; 4, a heat dissipation device; 5 display screen and light source control part.

Detailed Description

The invention is further described below with reference to examples.

As shown in FIG. 1, the LED-based moonlight simulation lamp box for providing an experimental condition with a spectrum closer to the moonlight spectrum and controllable light source stability for the research and test of low-light products indoors comprises a box body 1, a light source group 2, an optical component 3, the light source group 2 in the lamp box comprises a plurality of monochromatic visible light LED light sources and near-infrared LED light sources, the size of the length, the width and the height of the lamp box body is 650-700 mm multiplied by 350-400 mm multiplied by 500-550 mm, and the size of the lamp box body can simultaneously meet the illumination observation conditions of 0 degree/45 degrees (the light source illuminates in the normal direction of the surface of a sample and measures in the direction of 45 degrees of the normal) and 45 degrees/0 degrees (the light source illuminates in the direction of 45 degrees of the normal of the surface of the sample and measures in the direction of the normal).

The ten light source modules in the light source group 2 are arranged in a manner shown in fig. 2, the ten light source groups fill light in a staggered manner, light emitted by various different LEDs is uniformly mixed through an optical component, uniformity of the light source is realized, and multiple LED light sources are used for mixed illumination. LED lamp pearl mode of arranging is as shown in figure 4 on a light source group, and in order to improve even light effect, LED lamp pearl of the same type or the LED that the wavelength is close are central symmetry and place, and light source group part can be dismantled. Based on the spectrum superposition principle, the control of the output spectrum can be realized, so that the simulated light source is closer to the spectrum of the real light source.

Examples

The moonlight spectrum and the LED light source spectrum measured in the example are both measured by using PR-715 of Photo Research corporation, and the measurement range is 380 nm-1000 nm. The measured moonlight spectrum is the full moonlight spectrum of the local clear night, and the required number of various LEDs is calculated according to the measured moonlight spectrum and the LED light source spectrum.

The light source group 2 simulates full moon and moonlight and totally uses 1491 low-power monochromatic LEDs, wherein the main wavelength is 2 monochromatic LEDs with the wavelength of 380 nm-399 nm; 8 kinds of monochromatic LEDs with dominant wavelengths of 400-499 nm; 4 kinds of single-color LEDs with dominant wavelengths of 500-599 nm; 6 kinds of single-color LEDs with dominant wavelengths of 600 nm-699 nm; 4 kinds of single-color LEDs with dominant wavelengths of 700-799 nm; 5 kinds of single-color LEDs with the dominant wavelength of 800-899 nm; and the dominant wavelength is 4 monochromatic LEDs with the wavelength of 900-1000 nm. The monochromatic LED dominant wavelength interval of 33 monochromatic LED adjacent wave bands that this patent used is 5~40nm inequality. The light source arrangement is shown in fig. 4.

In this example, the correlation index R2 is used as a parameter for evaluating the good or bad fitting effect, and the calculation is shown as formula (1),

（1）

in the formula, y is the target value, ye is the estimated value, and n is the number of data points. R2 is less than or equal to 1, and the closer the value is to 1, the better the fitting effect of the estimated value and the target value is.

The programmed calculation resulted in the largest R2 combination of LEDs, which contained 33 LEDs with R2= 90.03%. The measured full moon spectrum and the simulated spectrum are shown in fig. 5.

Therefore, the LED-based moonlight simulation lamp box disclosed by the invention can provide an experimental condition with a spectrum more close to a moonlight spectrum and a stable and controllable light source for research and test of low-light products without the limitation of environment, weather, time and the like.

Claims (4)

1. The utility model provides a moonlight simulation lamp house based on LED, includes box (1), light source group (2), optical component (3), heat abstractor (4), display screen and light source control unit (5) five parts, its characterized in that: the light source group (2) in the lamp box comprises a plurality of monochromatic visible light LED light sources and near infrared LED light sources.

2. The LED-based moonlight simulation light box according to claim 1, wherein: the multiple monochromatic visible light LED light sources and the near-infrared LED light sources are provided with 33 low-power monochromatic LEDs, wherein the main wavelength is 2 monochromatic LEDs with the wavelength of 380-399 nm; 8 kinds of monochromatic LEDs with dominant wavelengths of 400-499 nm; 4 kinds of single-color LEDs with dominant wavelengths of 500-599 nm; 6 kinds of single-color LEDs with dominant wavelengths of 600 nm-699 nm; 4 kinds of single-color LEDs with dominant wavelengths of 700-799 nm; 5 kinds of single-color LEDs with the dominant wavelength of 800-899 nm; the dominant wavelengths of the single-color LEDs are 4 with the wavelengths of 900 nm-1000 nm, and the interval between the dominant wavelengths of the single-color LEDs in adjacent wave bands of the 33 low-power single-color LEDs is 5-40 nm.

3. The LED-based moonlight simulation light box according to claim 1, wherein: the size of the light box body is 650-700 mm x (350-400) mm x (500-550) mm, the size of the light box body can meet the lighting observation conditions of 0 degree/45 degrees and 45 degrees/0 degrees simultaneously, and the light source group part can be detached.

4. The LED-based moonlight simulation light box according to claim 1, wherein: the background of the outer wall and the inner wall of the box body is light-absorbing medium gray, so that the background color of the box body is prevented from influencing detection and observation.

Images