Compact CCD spectral illuminometer

Abstract

The utility model relates to the field of spectral measurement, and particularly discloses a compact CCD spectral illuminometer, which comprises a casing, a light path structure, a lithium battery and a circuit board, the light path structure and the lithium battery are arranged in parallel in the casing, the circuit board is arranged above the light path structure and the lithium battery, the lithium battery is used for supplying power to the circuit board and the whole machine, the light path structure comprises a rectangular prism, and the rectangular prism is arranged on the casing. The light source is used for converting light perpendicular to the shell into horizontal light. Light perpendicular to the shell is converted into horizontal light through the rectangular prism, the thickness of the device in the vertical direction is reduced, the space occupied by the light path structure is small, the internal structure is compact, and miniaturization of the device is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of spectrum measurement technology, concretely relates to a compact CCD spectrum illuminometer. BACKGROUND

[0002] The basic principle of the spectrometer is to separate the electromagnetic radiation of the radiation source into the required wavelength or wavelength region through the components such as the entrance slit, dispersion system (such as prism or diffraction grating), imaging system and exit slit, and to perform intensity measurement at the selected wavelength (or scan a certain waveband). It can directly display a spectrum, wherein the y-axis is intensity, and the x-axis is light wavelength / frequency, which represents the distribution of light intensity with light wavelength.

[0003] The internal light path structure of the traditional spectrometer occupies a large space in the design, so that the overall structure layout of the spectrometer has limitations, and after adding other electronic components, the overall structure is large, which is extremely inconvenient to carry and use. For example, the utility model CN209690155U discloses an automatic zero position calibration and temperature compensation CCD spectrum analyzer, which comprises a shell, a cosine corrector, a slit, a collimating mirror, a dispersion element plane grating, an imaging mirror, a CCD sensor and a mainboard. The light path structure and the mainboard each occupy about half of the space of the spectrum analyzer. The measured light signal is irradiated to the cosine corrector, enters the spectrometer shell through the slit, is reflected by the collimating mirror to form parallel light, is incident on the dispersion element plane grating, the dispersion element performs light splitting on the incident light, and the monochromatic light after light splitting is projected onto the focusing imaging mirror and converges on the CCD sensor. The incident light rays are incident from the side of the shell, and the light path is relatively long, which is not conducive to reducing the size of the device. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a compact CCD spectrum illuminometer to solve the problems of relatively long light path, device size and carrying and using.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A compact CCD spectrum illuminometer, comprising a shell, a light path structure, a lithium battery and a circuit board, the light path structure and the lithium battery are arranged side by side in the shell, the circuit board is arranged above the light path structure and the lithium battery, and the lithium battery is used for power supply of the circuit board and the whole machine; the light path structure comprises a right-angle prism, the right-angle prism is installed in the shell, and the right-angle prism is used for converting the light rays perpendicular to the shell into horizontal light rays;

[0007] Further, the light path structure further comprises a cosine corrector, an oblique square prism, an aperture plate and a slit, the cosine corrector is installed on the front face of the shell, one end of the cosine corrector is provided with the oblique square prism, the bottom of the oblique square prism is provided with the aperture plate, and the light rays emitted from the cosine corrector are incident on the oblique square prism.

[0008] Further, the diaphragm piece is attached to the light exit end of the rhombic prism.

[0009] Further, the slit is arranged above the right-angle prism.

[0010] Further, the light path structure further comprises a dispersion element plane grating, an imaging mirror, a collimating mirror, a CCD sensor, the light reflected by the right-angle prism is incident to the collimating mirror, the collimated light is reflected to the dispersion element plane grating, the dispersion element plane grating disperses the incident light, the dispersed monochromatic light is projected to the imaging mirror and converged to the CCD sensor.

[0011] Further, the CCD sensor is provided with a light shielding layer at one end.

[0012] The technical scheme of the utility model has the following beneficial effects:

[0013] 1. The utility model discloses a right-angle prism for converting the light perpendicular to the shell into horizontal light, reducing the thickness of the device in the vertical direction, and the light path structure occupies small space and has compact internal structure, facilitating the miniaturization of the device.

[0014] 2. The utility model discloses a rhombic prism for changing the light path to realize the translation of the light beam and lengthen the whole light path.

[0015] 3. The utility model discloses a lithium battery for supplying power to the whole machine, facilitating the carrying and use of the spectral illuminometer. DRAWINGS

[0016] In order to more clearly illustrate the technical scheme of the utility model embodiment, the following will briefly introduce the drawings needed in the embodiment description.

[0017] Figure 1 is the internal structure diagram of the compact CCD spectral illuminometer of the utility model;

[0018] Figure 2 is the light path structure diagram of the compact CCD spectral illuminometer of the utility model;

[0019] Figure 3 is the sectional view of the compact CCD spectral illuminometer of the utility model;

[0020] Figure 4 is the internal light path schematic diagram.

[0021] Figure 5 is the plane structure schematic diagram of the utility model.

[0022] Figure 6 is a partial structure diagram of the light path structure of the utility model.

[0023] Reference signs: 1, cosine corrector, 2, rhomboid prism, 3, diaphragm sheet, 4, slit, 5, right-angle prism, 6, dispersion element plane grating, 7, imaging mirror, 8, collimating mirror, 9, light-shielding layer, 10, CCD sensor, 11, casing, 12, lithium battery, 13, circuit board, 14, positioning groove. DETAILED DESCRIPTION

[0024] In order to make the utility model purposes, technical scheme and advantages more clearly, below will combine with the drawings and examples, to the utility model will be further detailed explanation.Should understand, the specific examples described here are only used to explain the utility model, and are not used to limit the utility model.Based on the examples in the utility model, all other examples obtained by the person skilled in the art without making creative labor are within the scope of the utility model protection.

[0025] Example one:

[0026] Reference Figure 1 As Figure 1 Indicated, the compact CCD spectral illuminometer of the utility model, including casing 11, the light path structure and lithium battery 12 are arranged in parallel in casing 11, and circuit board 13 is arranged above the light path structure and lithium battery 12, and lithium battery 12 is used to power supply circuit board 13 and whole machine.As Figure 2 And Figure 3 Indicated, the light path structure includes cosine corrector 1, rhomboid prism 2, diaphragm sheet 3, slit 4, right-angle prism 5, dispersion element plane grating 6, imaging mirror 7, collimating mirror 8, light-shielding layer 9, CCD sensor 10.Collimating mirror 8 is towards right-angle prism 5.

[0027] As Figure 4As shown, the cosine corrector 1 is arranged on the front surface of the shell of the casing 11, and the measured light signal is irradiated to the cosine corrector 1. The cosine corrector 1 is used to correct the incident light signal, so as to reduce the influence of the observation angle on the reflectivity, thereby improving the measurement accuracy. The light ray after the correction of the cosine corrector 1 is incident to the rhombic prism 2. By controlling the incident angle of the rhombic prism 2, the light ray is deflected twice in the rhombic prism 2 to ensure that the light ray propagates along the predetermined path. The diaphragm sheet 3 is attached to the exit end of the rhombic prism 2. The diaphragm sheet 3 is used to shield the stray light, so that the main light ray is emitted along the path. The slit 4 is arranged above the right-angle prism 5 to limit the incident light. By adjusting the width and position of the slit 4, the amount and direction of the light ray entering the system can be further controlled. The light ray is totally reflected and deflected by 90° in the right-angle prism 5, and then is incident to the collimating mirror 8, so as to reduce the energy loss and ensure the effective use of the light ray. The turning of the right-angle prism 5 can simplify the optical path design of the optical system, avoid using multiple mirrors or lenses to achieve the same function, and thereby reduce the complexity and cost of the system. At the same time, the turning optical path design of the right-angle prism 5 can optimize the spatial layout of the optical system, so that the system is more compact and portable.

[0028] The collimating mirror 8 reflects the collimated light ray to the dispersive element plane grating 6, so as to ensure that the light ray is incident to the dispersive element plane grating 6 in a parallel and uniform manner, thereby reducing the scattering and diffraction effects of the light ray in the incident process and improving the accuracy of the spectral measurement. The dispersive element plane grating 6 separates the incident light into different spectral lines of different wavelengths, thereby improving the spectral resolution and enabling the subtle spectral characteristics to be clearly distinguished, so as to provide accurate data for subsequent spectral analysis. The monochromatic light after the light splitting is projected to the imaging mirror 7, and is converged to the CCD sensor 10. The CCD sensor 10 is provided with a light shielding layer 9 at one end. The light shielding layer 9 at the beginning of the CCD sensor 10 is used to shield part of the CCD photosensitive surface for zero calibration. The photosensitive surface of the CCD sensor 10 receives the converged monochromatic light, and converts the monochromatic light into an electrical signal for storage and processing. The circuit board 13 controls the output of the electrical signal of the CCD sensor 10, and collects and analyzes the spectral data for output and display.

[0029] Further reference Figure 1 The casing 11 is provided with a positioning groove 14, and the right-angle prism 5 is arranged in the positioning groove 14 and is installed. The small end of the right-angle prism 5 faces the diaphragm sheet 3. The positioning groove 14 can facilitate the positioning of the installation position of the right-angle prism 5, and can keep the right-angle prism 5. At the same time, the positioning grooves 14 distributed in the casing 11 can further improve the space utilization rate of the casing 11.

[0030] Further reference Figure 1The mounting positions of the plane grating 6, the imaging mirror 7, the collimating mirror 8 and the CCD sensor 10 are preset in the shell 11, so that the internal space is compact, and the whole product is convenient to assemble and carry.

[0031] Embodiment two:

[0032] With reference to Figure 3 The cosine corrector 1 is fixed on the protruding surface of the shell 11, and the rhomboid prism 2 is arranged behind the cosine corrector 1 and is arranged in the protruding surface of the shell 11; the right-angle prism 5 is arranged on the same vertical plane of the light emitting end of the rhomboid prism 2, so that the light emitted from the diaphragm sheet 3 can directly pass through the slit 4 and enter the right-angle prism 5, and the light can complete the light splitting function.

[0033] The above embodiment is only an exemplary embodiment of the present application, and is not used for limiting the present application, and the protection scope of the present application is defined by the claims. In the substantial and protection scope of the present application, various modifications or equivalent replacements can be made to the present application. The modification or equivalent replacement should also be regarded as falling within the protection scope of the present application.

[0034] In the description of the present application, it should be explained that the directions or position relationships indicated by the terms "inner", "front", "rear", "left", "right" and the like are based on the directions or position relationships shown in the drawings, or are the directions or position relationships commonly used when the product of the present application is used, and are only used for conveniently describing the present application and simplifying the description, and do not indicate or imply that the indicated devices or elements must have a specific direction, a specific direction structure and operation. Therefore, the terms indicating the directions or position relationships should not be understood as the limitation of the present application.

[0035] In the description of the present application, it should be further explained that, unless otherwise explicitly specified and limited, the terms "arrange", "connect" should be understood in a broad sense, for example, these terms can represent the fixed connection, detachable connection or integral connection between elements; can also represent mechanical connection, electrical connection; or can represent direct connection or indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of these terms in the present application can be understood according to the specific circumstances.

Claims

1. A compact CCD spectral illuminometer characterized by: It includes a casing (11), an optical path structure, a lithium battery (12) and a circuit board (13), the optical path structure and the lithium battery (12) are arranged side by side in the casing (11), and the circuit board (13) is arranged above the optical path structure and the lithium battery (12), the lithium battery (12) is used for supplying power to the circuit board (13) and the whole machine; The optical path structure includes a right-angle prism (5), the right-angle prism (5) is installed inside the casing (11), and the right-angle prism (5) is used for converting light rays perpendicular to the casing into horizontal light rays.

2. A compact CCD spectral illuminometer according to claim 1, characterized in that: The optical path structure further includes a cosine corrector (1), an isosceles prism (2), a diaphragm sheet (3) and a slit (4), the cosine corrector (1) is installed on the front face of the casing (11), one end of the cosine corrector (1) is provided with the isosceles prism (2), the bottom of the isosceles prism (2) is provided with the diaphragm sheet (3), and the light rays emitted by the cosine corrector (1) are incident on the isosceles prism (2).

3. A compact CCD spectral radiometer according to claim 2, characterized in that: The diaphragm sheet (3) is attached to the light ray emitting end of the isosceles prism (2).

4. A compact CCD spectral illuminometer according to claim 3, characterized in that: The slit (4) is arranged above the right-angle prism (5).

5. A compact CCD spectral illuminometer according to claim 4, characterized in that: The optical path structure further includes a dispersion element plane grating (6), an imaging mirror (7), a collimating mirror (8) and a CCD sensor (10), the light rays reflected by the right-angle prism (5) are incident on the collimating mirror (8), the collimated light rays are reflected to the dispersion element plane grating (6), the dispersion element plane grating (6) performs light splitting on the incident light, the monochromatic light after light splitting is projected to the imaging mirror (7) and converged on the CCD sensor (10).

6. A compact CCD spectral illuminometer according to claim 5, characterized in that: One end of the CCD sensor (10) is provided with a light shielding layer (9).

7. A compact CCD spectral illuminometer according to claim 2, characterized in that: The casing (11) is provided with a positioning groove (14), the right-angle prism (5) is installed inside the positioning groove (14), and the small end of the right-angle prism (5) faces the diaphragm sheet (3).

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