A wide and narrow slit combined partitioned star optical radiation characteristic simulation system

Abstract

The application discloses a wide-narrow-slit combined partitioned constant star optical radiation characteristic simulation system, which is used for simulating the optical radiation characteristic of a star. The system is composed of a continuous laser light source, a multi-element partitioned mapping spectrum modulation system, a multi-channel integrating sphere coupling system, a multi-output optical fiber group, an optical fiber spectrometer monitoring system and a data processing and control system. The multi-element partitioned mapping spectrum modulation system comprises a pre-collimation and expansion system and multi-size slits. The pre-collimation and expansion system expands the light beam to fill the DMD array surface, and the wide-narrow-slit combination improves the energy and spectrum modulation capacity and compensates for the modulation interference. The double-prism symmetrically placed light splitting system ensures that the light beam is parallelly incident and output. The 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, the independent modulation of the star point color temperature and the star magnitude is realized, and the sub-region modulation capacity satisfies the formula n >= t / c. The multi-channel integrating sphere coupling system realizes light mixing and independent output, and the system has high precision and strong flexibility.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of optical testing, in particular to a wide and narrow slit combined partitioned star optical radiation characteristic simulation system. BACKGROUND

[0002] The traditional spectrum modulation system has obvious defects in beam processing. Its structure is easy to produce divergent light beams, which leads to light beam overflow, causing energy loss and affecting the stability of the light beam, and it is difficult to meet the needs of high-precision simulation. In terms of spectrum adjustment ability, the traditional system is also relatively limited, and it is difficult to achieve fine adjustment of the spectrum, which makes the simulation of the optical radiation characteristics of the star insufficient. In addition, the traditional system cannot independently modulate the color temperature and star of the simulation star point, and there is interference between the simulation regions, which cannot flexibly simulate the optical radiation characteristics of multiple different stars, and the application range is greatly limited.

[0003] Therefore, it is necessary to develop a wide and narrow slit combined partitioned star optical radiation characteristic simulation system to solve the above problems. SUMMARY

[0004] The purpose of the present application is to provide a wide and narrow slit combined partitioned star optical radiation characteristic simulation system.

[0005] To achieve the above purpose, the present application provides the following technical scheme:

[0006] A wide and narrow slit combined partitioned star optical radiation characteristic simulation system, the system comprises a continuous laser light source, a multi-element partitioned mapping spectrum modulation system, a multi-channel integrating sphere coupling system, a multi-output optical fiber group, an optical fiber spectrometer monitoring system and a data processing and control system;

[0007] The multi-element partitioned mapping spectrum modulation system is composed of a front collimating and expanding system, a multi-size slit, a double-prism symmetrically placed light splitting system and a DMD. The multi-size slit is composed of a wide slit and a narrow slit arranged in an upper and lower distribution to form a slit group, and each DMD region corresponds to a slit group. The double-prism symmetrically placed light splitting system adopts a double-prism symmetrically placed structure.

[0008] The multi-channel integrating sphere coupling system is composed of a multi-channel coupling lens, a mirror and an integrating sphere, and each integrating sphere in the multi-channel integrating sphere coupling system is arranged in a staggered manner.

[0009] Specifically, the front collimating and expanding 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 improve the energy of the system, and the narrow slit is used to improve the spectral modulation ability of the system and compensate for the modulation interference between adjacent regions of the DMD array surface.

[0011] Specifically, the two prisms are symmetrically placed in the light splitting system, and the two prisms are the same, the refractive index of each wavelength is the same, the beam refraction angle of the first prism is the beam incidence angle of the second prism, and the refraction angle of the second prism is equal to the incidence angle of the first prism.

[0012] Specificly, the DMD array surface is divided into p independent sub-regions along the non-dispersive direction for independent modulation to realize independent modulation of each simulated star point color temperature and star magnitude; each sub-region of the DMD array surface corresponds to a group of wide and narrow slit channels in the multi-size slit.

[0013] Specifically, the DMD sub-region resolution is m x n, where m represents the dispersion direction resolution, n represents the modulation direction resolution, the difference between the highest energy and the lowest energy of the simulated target color temperature spectrum curve is t, the spectral simulation error is c, and the modulation ability of the sub-region satisfies the formula n≥t / c.

[0014] Beneficial effects:

[0015] The application adopts a pre-collimation beam expansion system to expand the wide spectrum beam emitted by the 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 a foundation for subsequent accurate modulation; at the same time, the two prisms are symmetrically placed in the light splitting system, and the two prisms are the same, the refractive index of each wavelength is the same, the beam refraction angle of the first prism is the beam incidence angle of the second prism, and the refraction angle of the second prism is equal to the incidence angle of the first prism. The light beam incident on the DMD is a parallel light beam, which is still output as a parallel light beam after being reflected and modulated by the DMD, effectively avoiding the problems of light beam overflow and energy loss caused by divergent light beams in the structure of the traditional spectral modulation system, and improving the stability and light beam utilization rate of the system.

[0016] The DMD array surface is divided into multiple independent sub-regions along the non-dispersive direction, and each sub-region corresponds to a group of wide and narrow slit channels. By independently modulating these sub-regions, the independent output of different region star spectra and star magnitudes is realized. This partition independent control method can flexibly simulate the optical radiation characteristics of multiple different stars.

[0017] By accurately setting the relationship between the DMD sub-region resolution and the simulated target spectrum parameters, it is ensured that each sub-region of the partitioned DMD has sufficient adjustment ability to meet the simulation of different precision requirements of star optical radiation characteristics. The innovative design and working principle of the system lay a solid theoretical and technical foundation for the development of future spectral multi-star simulators and other new spectral instruments and equipment, and promote the development and progress of related fields.

[0018] The wide slit can improve the overall energy of the system and ensure sufficient light energy in the simulation process; the narrow slit can not only improve the spectral modulation capacity of the system and realize more precise spectral adjustment, but also compensate for the modulation interference between adjacent regions of the DMD array surface caused by spectral superposition, ensure the independence and accuracy of the modulation of each region, and then realize the independent modulation of the color temperature and magnitude of each simulated star point, thereby significantly improving the precision and diversity of the simulated constant star optical radiation characteristics of the system. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 A multi-element mapping constant star optical radiation characteristic simulation system with a combination of wide and narrow slits is shown in the present application.

[0020] Figure 2 A multi-element mapping spectral modulation system structure diagram is shown in the present application.

[0021] Figure 3 A double-prism symmetrical placement of a light splitting system structure diagram is shown in the present application.

[0022] Figure 4 A DMD array surface spatial spectrum distribution diagram is shown in the present application.

[0023] Figure 5 A p sub-region diagram is shown in the present application.

[0024] Figure 6 A wide and narrow slit combination single region simulation diagram is shown in the present application.

[0025] Figure 7 An integrating sphere, a mirror and a coupling lens arrangement diagram is shown in the present application.

[0026] Figure 8 A multi-element mapping constant star optical radiation characteristic simulation system region division diagram is shown in the present application. DETAILED DESCRIPTION

[0027] The technical solutions of the present application will be clearly and completely described below with reference to the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of the present application. In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through an intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0028] Please refer to Figure 1 The wide and narrow slit combined constant star optical radiation characteristic simulation system provided by the embodiments of the present application mainly comprises a continuous laser light source, a multi-element partition mapping spectrum modulation system, a multi-channel integrating sphere coupling system, a multi-output optical fiber group, an optical fiber spectrometer monitoring system and a data processing and control system.

[0029] Please refer to Figure 2 The multi-element partition mapping spectrum modulation system comprises a pre-collimation and expansion system, multi-size slits, a double-prism symmetrical splitting system and a DMD. The first prism splits the light beam, and the second prism recollimates the split light beam, thereby avoiding the influence of light beam overflow caused by the divergent light beam of the structure of the traditional spectrum modulation system. The pre-collimation and expansion system replaces the collimating mirror in the traditional spectrum modulation system, and a multi-size slit is added, i.e. a slit group composed of a wide slit and a narrow slit arranged above and below each other, each DMD region corresponds to a slit group, the wide slit can improve the energy of the system, and the narrow slit can improve the spectrum modulation capability of the system.

[0030] Please refer to Figure 3The dual-prism symmetrical beam splitting system employs a dual-prism symmetrical placement structure. The first prism splits the beam, and the second prism recollides the split beam. Since the two prisms are identical, their refractive indices for all wavelengths are the same. The beam refraction angle of the first prism is the beam incident angle 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. Since the beam is collimated before entering the first prism, the beam propagation direction remains unchanged after passing through the first and second prisms. That is, the beam incident on the DMD is a parallel beam, and after reflection modulation by the DMD, it is also output as a parallel beam, effectively avoiding the influence of divergent beams caused by the structure of traditional spectral modulation systems.

[0031] The DMD array can be viewed as a two-dimensional spectral distribution curve, with the light arrangement as follows: Figure 4 As shown; Figure 5 As shown, the DMD array plane is divided into p independent sub-regions along the non-dispersive direction, and then independently modulated, thus achieving independent modulation of the color temperature and magnitude of each simulated star point. Since the spectra between adjacent regions in the DMD array plane are not completely independent, and there is some superposition between the spectra of adjacent regions, another function of the narrow slit is to compensate for modulation interference between adjacent regions of the DMD array plane. A single-region simulation using a combination of wide and narrow slits is shown below. Figure 6 As shown.

[0032] To ensure that each sub-region of the partitioned DMD has sufficient adjustment capability, let the resolution between DMD sub-regions be . ,in Indicates resolution in the dispersion direction. This indicates the modulation direction resolution, representing the phase difference between the highest and lowest energies of the simulated target color temperature spectral curve. The spectral simulation error is In theory, the modulation capability of the sub-region must meet the requirements of formula (1), and the calculation formula is as follows:

[0033] (1)

[0034] A multi-channel integrating sphere coupling system consists of multiple coupling lenses, mirrors, and integrating spheres. The integrating spheres are arranged in a staggered sequence. Mirrors deflect the beams in their respective sub-regions, causing them to converge into the corresponding integrating sphere channels. The arrangement of the integrating spheres, mirrors, and coupling lenses is as follows: Figure 7 As shown.

[0035] In use, the continuous laser light source emits a wide spectrum light beam through a pre-collimation beam expansion system in the multi-element partition mapping spectrum modulation system, the pre-collimation beam expansion system expands the wide spectrum light beam in the non-dispersive direction, so that the wide spectrum light beam fills the entire DMD array surface in the non-dispersive direction, and the expanded wide spectrum light beam enters the DMD array surface in parallel after passing through the multi-size slit and the symmetrically placed double-prism light splitting system; since the multi-element partition mapping spectrum modulation system does not change the propagation direction of the light beam, the wide spectrum light beam is incident on the DMD array surface in a collimated state, and is emitted in a slant collimated light beam after being modulated by the DMD; wherein the DMD array surface is equally divided into p sub-regions, the multi-mapping constant star optical radiation characteristic simulation system is divided as shown in Figure 8 The wide spectrum light beam modulated by each sub-region of the DMD enters the multi-channel integrating sphere coupling system for light mixing, and the wide spectrum light beam of each sub-region enters the corresponding integrating sphere channel and is independently outputted in terms of the constant star spectrum and magnitude through the multi-output optical fiber.

[0036] In summary, the light beam is expanded by the pre-collimation beam expansion system, then enters the DMD array surface in parallel after passing through the symmetrically placed double-prism light splitting system, the DMD array surface is equally divided into multiple independent modulation regions, each sub-region corresponds to a group of wide and narrow slit channels in the multi-size slit, and the independent output of the constant star spectrum and magnitude of each region is realized, which lays a theoretical and technical foundation for the development of future spectral multi-star simulators and other new spectral instruments and equipment.

[0037] The technical features of the above-described embodiments can be combined in any manner, and to make the description concise, all possible combinations of the technical features in the above-described embodiments are not described, however, as long as the combinations of the technical features do not exist contradictions, they should be considered as the scope of the present application.

[0038] The above-described embodiments only express several implementation manners of the present application, the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the patent. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A system for simulating the optical radiation characteristics of stars using a combination of wide and narrow slits, characterized in that, The system includes a continuous laser source, a multi-dimensional partitioned mapping spectral modulation system, a multi-channel integrating sphere coupling system, a multi-output fiber optic group, a fiber optic spectrometer monitoring system, and a data processing and control system. The multi-dimensional partitioned mapping spectral modulation system comprises a pre-collimation and beam-expanding system, multi-sized slits, a bi-prism symmetrically placed beam-splitting system, and a DMD. The pre-collimation and beam-expanding system expands the broadband beam emitted by the continuous laser source in the non-dispersive direction, ensuring the broadband beam fills the entire DMD array surface in the non-dispersive direction. The DMD... Each sub-region of the array surface corresponds to a set of wide and narrow slit channels in a multi-size slit array; the multi-size slit array consists of two slits, one wide and one narrow, arranged vertically to form a slit group; the bi-prism symmetrical beam splitting system adopts a bi-prism symmetrical placement structure; in the bi-prism symmetrical placement beam splitting system, the two prisms are identical, and their refractive indices for all wavelengths are the same. The beam refraction angle of the first prism is the 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; the multi-channel integrating sphere coupling system consists of a multi-path coupling lens, a reflector, and an integrating sphere, with each integrating sphere arranged in a staggered manner; the broadband beam of each sub-region enters the corresponding integrating sphere channel, and the independent output of the stellar spectrum and magnitude of each region is achieved through multiple output optical fibers.

2. The stellar optical radiation characteristic simulation system based on a combination of wide and narrow slits according to claim 1, characterized in that, The wide slits of the slit group are used to enhance the system's energy, while the narrow slits are used to improve the system's spectral modulation capability and compensate for modulation interference between adjacent regions of the DMD array surface.

3. The stellar optical radiation characteristic simulation system based on a combination of wide and narrow slits according to claim 1, characterized in that, Let the resolution of each sub-region of the DMD array be m×n, where m represents the resolution in the dispersion direction and n represents the resolution in the modulation direction. Let t be the multiple of the difference between the highest and lowest energies of the simulated target color temperature spectrum curve, and let c be the spectral simulation error. The modulation capability of each sub-region of the DMD array satisfies the formula n≥t / c.

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