Fixed star optical radiation characteristic simulation system of wide and narrow slit combination partition

Abstract

The invention discloses a wide and narrow slit combined partitioned star optical radiation characteristic simulation system, which is used for star optical radiation characteristic simulation. The system is composed of a continuous laser light source, a multi-element partition mapping spectrum modulation system, a multi-channel integrating sphere coupling system, a multi-path output optical fiber group, an optical fiber spectrometer monitoring system and a data processing and control system. The multi-element partition mapping spectrum modulation system comprises a front collimation and beam expanding system, multi-size slits and the like, the front collimation and beam expanding system expands beams to enable the DMD array surface to be full of the beams, and the combination of the wide and narrow slits improves energy and spectrum modulation capability and compensates modulation interference; the beam splitting system with biprisms symmetrically arranged ensures parallel incidence and output of light beams. A DMD array surface is divided into p independent sub-regions for independent modulation, each sub-region corresponds to a group of wide-narrow slit channels, independent modulation of simulated star point color temperature and star magnitude is realized, and the modulation capability of the sub-regions meets a formula that n is greater than or equal to t / c. The multi-channel integrating sphere coupling system realizes light beam mixing and independent output, and the system is high in precision and high in flexibility.

Description

Technical Field

[0001] The present invention relates to the field of optical testing technology, and in particular to a stellar optical radiation characteristic simulation system with wide and narrow slit combination partitioning. Background Art

[0002] Traditional spectral modulation systems have significant drawbacks in beam processing. Their structure easily produces divergent beams, leading to beam overflow, energy loss, and reduced beam stability, making it difficult to meet the demands of high-precision simulation. Traditional systems are also limited in their spectral modulation capabilities, unable to achieve fine-tuning of the spectrum, resulting in insufficient precision in simulating stellar optical radiation characteristics. Furthermore, traditional systems struggle to independently modulate the color temperature and magnitude of simulated star points, resulting in interference between simulation regions and an inability to flexibly simulate the optical radiation characteristics of a wide variety of stars, significantly limiting their scope of application.

[0003] Therefore, it is necessary to develop a stellar optical radiation characteristics simulation system with a combination of wide and narrow slits to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a stellar optical radiation characteristic simulation system with wide and narrow slit combination partitioning.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] A stellar optical radiation characteristics simulation system with a combination of wide and narrow slits, comprising a continuous laser light source, a multi-element partition mapping spectrum modulation system, a multi-channel integrating sphere coupling system, a multi-channel output optical fiber group, an optical fiber spectrometer monitoring system, and a data processing and control system;

[0007] The multi-element partition mapping spectral modulation system consists of a front-end collimating beam expansion system, multi-size slits, a symmetrically placed double-prism spectroscopic system, and a DMD. The multi-size slits are composed of two slits, one wide and one narrow, distributed vertically to form a slit group, and each DMD area corresponds to a slit group. The symmetrically placed double-prism spectroscopic system adopts a symmetrically placed double-prism structure.

[0008] The multi-channel integrating sphere coupling system is composed of a multi-channel coupling lens, a reflecting mirror and an integrating sphere. The integrating spheres in the multi-channel integrating sphere coupling system are staggered in sequence.

[0009] Specifically, the pre-collimation beam expansion system is used to expand the wide-spectrum light beam emitted by the continuous laser light source in the non-dispersive direction, so that the wide-spectrum light beam fills the entire DMD array surface in the non-dispersive direction.

[0010] Specifically, the wide slit is used to increase the energy of the system, and the narrow slit is used to improve the spectrum modulation capability of the system and to compensate for the modulation interference between adjacent areas of the DMD array surface.

[0011] Specifically, the double prisms are symmetrically placed in the spectroscopic system, the two prisms are identical, and their refractive index for each wavelength is the same, the light beam refraction angle of the first prism is the light beam incident angle of the second prism, and the refraction angle of the second prism is equal to the incident angle of the first prism.

[0012] Specifically, the DMD array surface is divided into p independent sub-areas along the non-dispersive direction for independent modulation, so as to achieve independent modulation of the color temperature and magnitude of each simulated star point; each sub-area of ​​the DMD array surface corresponds to a group of wide and narrow slit channels in the multi-size slits.

[0013] Specifically, the DMD sub-interval resolution is assumed to be m×n, where m represents the dispersion direction resolution, n represents the modulation direction resolution, the phase difference multiple t between the highest energy and the lowest energy of the simulated target color temperature spectrum curve is simulated, the spectrum simulation error is c, and the modulation capability of the sub-area satisfies the formula n≥t / c.

[0014] Beneficial effects:

[0015] This application adopts a pre-collimation beam expansion system to expand the wide-spectrum light beam emitted by a continuous laser light source in the non-dispersive direction, so that the light beam can fill the entire DMD array surface, fully utilize the effective area of ​​​​the DMD, and lay the foundation for subsequent precise modulation; at the same time, the double-prism symmetrically placed splitting system uses two identical prisms to split and re-collimate the light beam, ensuring that the light beam incident on the DMD is a parallel light beam, and is still output as a parallel light beam after reflection modulation by the DMD, effectively avoiding the problems of beam overflow and energy loss caused by the divergent light beam in the traditional spectral modulation system structure, and improving the stability of the system and the light beam utilization rate.

[0016] The DMD array is divided into multiple independent sub-regions along the non-dispersive direction. Each sub-region corresponds to a set of wide and narrow slit channels. By independently modulating these sub-regions, independent output of stellar spectra and magnitudes in different regions is achieved. This independent control of each sub-region enables flexible simulation of the optical radiation characteristics of a variety of different stars.

[0017] By precisely defining the relationship between the DMD sub-region resolution and the target spectral parameters, the partitioned DMD sub-regions are ensured to have sufficient adjustment capability to simulate stellar optical radiation characteristics with varying precision requirements. This system's innovative design and operating principles lay a solid theoretical and technical foundation for the development of new spectroscopic instruments and equipment, such as future spectral multi-star simulators, and will promote the development and advancement of related technologies.

[0018] A wide slit can increase the overall energy of the system and ensure sufficient light energy during the simulation process; a narrow slit can not only improve the system's spectral modulation capability and achieve more precise spectral adjustment, but also compensate for the modulation interference caused by spectral superposition between adjacent areas of the DMD array surface, ensuring the independence and accuracy of the modulation of each area, and thus achieving independent modulation of the color temperature and magnitude of each simulated star point, significantly improving the accuracy and diversity of the system's simulation of stellar optical radiation characteristics. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a diagram showing the composition and working principle of the multi-element mapping stellar optical radiation characteristics simulation system for wide and narrow slit combination partitioning shown in the present invention;

[0020] Figure 2 This is a structural diagram of the multi-element partition mapping spectrum modulation system shown in the present invention;

[0021] Figure 3 This is a structural diagram of a light splitting system with symmetrically placed double prisms shown in the present invention;

[0022] Figure 4 Schematic diagram of the spatial spectrum distribution of the DMD array surface shown in the present invention;

[0023] Figure 5 Schematic diagram of p sub-areas shown in the present invention;

[0024] Figure 6 This is a schematic diagram of a single-region simulation of a wide and narrow slit combination shown in the present invention;

[0025] Figure 7 This is a diagram showing the arrangement of the integrating sphere, reflector, and coupling lens shown in the present invention;

[0026] Figure 8 This is a schematic diagram of the regional division of the multi-element mapping stellar optical radiation characteristics simulation system shown in the present invention. DETAILED DESCRIPTION

[0027] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the embodiments described are some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without inventive effort shall fall within the scope of protection of the present invention. In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can mean fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; or internal communication between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood in specific circumstances. In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0028] See Figure 1 The embodiment of the present application provides a stellar optical radiation characteristics simulation system with a combination of wide and narrow slits, which is mainly composed of a continuous laser light source, a multi-element partition mapping spectrum modulation system, a multi-channel integrating sphere coupling system, a multi-channel output optical fiber group, a fiber optic spectrometer monitoring system and a data processing and control system.

[0029] See also Figure 2 The multi-element partition mapping spectral modulation system consists of a pre-collimation beam expansion system, multi-sized slits, a symmetrically placed dual-prism beam splitting system, and a DMD. The first prism splits the light beam, and the second prism re-collimates the separated beams, avoiding the beam overflow caused by the divergent beam structure of traditional spectral modulation systems. The pre-collimation beam expansion system replaces the collimating reflector in traditional spectral modulation systems, and a multi-sized slit is added. That is, a slit group is composed of two slits, one wide and one narrow, distributed vertically. Each DMD area corresponds to a slit group. The wide slit can increase the system's energy, while the narrow slit can improve the system's spectral modulation capability.

[0030] See also Figure 3The double prisms are placed symmetrically. The spectroscopic system adopts a double prism symmetrically placed structure. The light beam is split by the first prism, and the second prism re-collimates the separated light beam. Since the two prisms are the same, their refractive indices for each wavelength are the same. The refraction angle of the light beam of the first prism is the incident angle of the light beam of the second prism. According to the law of refraction, the refraction angle of the second prism is equal to the incident angle of the first prism, and the light beam is a collimated light beam before entering the first prism. Therefore, after the light beam passes through the first prism and the second prism, the propagation direction of the light beam remains unchanged, that is, the light beam incident on the DMD is a parallel light beam, and after reflection modulation by the DMD, it is also output as a parallel light beam, effectively avoiding the influence of the divergent light beam structure of the traditional spectral modulation system.

[0031] The DMD array surface can be regarded as a two-dimensional spectral distribution curve, and the light arrangement is as follows Figure 4 As shown; Figure 5 As shown in the figure, the DMD array surface is divided into p independent sub-areas along the non-dispersive direction, and then modulated independently, thereby achieving independent modulation of the color temperature and magnitude of each simulated star point. Since the spectra between adjacent areas in the DMD array surface are not completely independent, and the spectra between adjacent areas have a certain overlap, another function of the narrow slit is to compensate for the modulation interference between adjacent areas of the DMD array surface. Figure 6 shown.

[0032] In order to ensure that each sub-region of the partitioned DMD has sufficient adjustment ability, the DMD sub-region resolution is set to ,in represents the dispersion direction resolution, Indicates the modulation direction resolution, which simulates the difference between the highest energy and the lowest energy of the target color temperature spectrum curve , the spectrum simulation error is , then theoretically the modulation capability of the sub-region must meet the requirements of formula (1), and the calculation formula is:

[0033] ; (1)

[0034] The multi-channel integrating sphere coupling system consists of a multi-way coupling lens, a reflector and an integrating sphere. The integrating spheres in the multi-channel integrating sphere coupling system are staggered in sequence, and the reflector is used to deflect the light beams in the corresponding sub-areas so that they converge into the corresponding integrating sphere channels. The arrangement of the integrating sphere, reflector and coupling lens is as follows: Figure 7 shown.

[0035] When in use, a continuous laser light source emits a wide-spectrum beam that passes through a pre-collimation beam expansion system in a multi-element partition mapping spectrum modulation system. The pre-collimation beam expansion system expands the wide-spectrum beam in a non-dispersive direction, so that the wide-spectrum beam fills the entire DMD array surface in the non-dispersive direction. The expanded wide-spectrum beam passes through multi-size slits and enters a symmetrically placed double-prism spectrometer system, and then is incident parallel to the DMD array surface. Since the multi-element partition mapping spectrum modulation system does not change the propagation direction of the beam, the wide-spectrum beam is incident on the DMD array surface in a collimated state, and is emitted as an obliquely collimated beam after DMD modulation. The DMD array surface is equally divided into p sub-areas, and the area division of the multi-element mapping stellar optical radiation characteristic simulation system is as follows: Figure 8 As shown, each sub-region of the DMD array surface essentially corresponds to a group of wide and narrow slit channels in a multi-sized slit. Each group of DMD sub-regions can independently modulate the color temperature and magnitude. The light beams with various stellar radiation information modulated by each DMD sub-region enter the multi-channel integrating sphere coupling system for light mixing. The wide-spectrum light beams of each sub-region enter the corresponding integrating sphere channel respectively, and the independent output of the stellar spectrum and magnitude of each region is achieved through multi-channel output optical fibers.

[0036] In summary, this application expands the light beam through a pre-collimation and expansion system, and then passes through a double prism symmetrically placed spectrometer system before being incident parallel to the DMD array surface, dividing the DMD array surface into multiple independent modulation areas, and each sub-area corresponds to a set of wide and narrow slit channels in a group of multi-sized slits, thereby achieving independent output of stellar spectra and magnitudes in each area, which can lay a theoretical and technical foundation for the development of new spectral instruments and equipment such as future spectral multi-star simulators.

[0037] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0038] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A stellar optical radiation characteristics simulation system with wide and narrow slit combination partitioning, characterized by: The system includes a continuous laser light source, a multi-element partition mapping spectral modulation system, a multi-channel integrating sphere coupling system, a multi-channel output optical fiber group, an optical fiber spectrometer monitoring system and a data processing and control system; wherein the multi-element partition mapping spectral modulation system is composed of a pre-collimation beam expansion system, a multi-size slit, a symmetrically placed double prism spectrometer system and a DMD; the multi-size slit is composed of two slits, one wide and one narrow, distributed vertically to form a slit group, and each DMD area corresponds to a slit group; the symmetrically placed double prism spectrometer system adopts a symmetrically placed double prism structure; the multi-channel integrating sphere coupling system is composed of a multi-channel coupling lens, a reflector and an integrating sphere, and the integrating spheres in the multi-channel integrating sphere coupling system are arranged in a staggered manner.

2. The stellar optical radiation characteristics simulation system with wide and narrow slit combination partitioning according to claim 1 is characterized in that: The front collimating beam expansion system is used to expand the wide spectrum light beam emitted by the continuous laser light source in the non-dispersive direction, so that the wide spectrum light beam fills the entire DMD array surface in the non-dispersive direction.

3. The stellar optical radiation characteristics simulation system with wide and narrow slit combination partitioning according to claim 1 is characterized in that: The wide slit is used to increase the energy of the system, and the narrow slit is used to improve the spectrum modulation capability of the system and to compensate for the modulation interference between adjacent areas of the DMD array surface.

4. The stellar optical radiation characteristics simulation system with wide and narrow slit combination partitioning according to claim 1 is characterized in that: The double prisms are symmetrically placed in the spectroscopic system. The two prisms are identical and have the same refractive index for each wavelength. The refraction angle of the light beam of the first prism is the incident angle of the light beam of the second prism, and the refraction angle of the second prism is equal to the incident angle of the first prism.

5. A stellar optical radiation characteristics simulation system with wide and narrow slit combination partitioning according to claim 1, characterized in that: The DMD array surface is divided into p independent sub-areas along the non-dispersive direction for independent modulation to achieve independent modulation of the color temperature and magnitude of each simulated star point; each sub-area of ​​the DMD array surface corresponds to a group of wide and narrow slit channels in the multi-sized slits.

6. The stellar optical radiation characteristics simulation system with wide and narrow slit combination partitioning according to claim 5, characterized in that: Assume that the DMD sub-region resolution is m×n, where m represents the dispersion direction resolution and n represents the modulation direction resolution. The phase difference between the highest energy and the lowest energy of the simulated target color temperature spectrum curve is t, and the spectrum simulation error is c. The modulation capability of the sub-region satisfies the formula n≥t / c.

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