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CN-122016252-A - Optical system transmittance calibration method based on optical fiber interconnection

CN122016252ACN 122016252 ACN122016252 ACN 122016252ACN-122016252-A

Abstract

The invention relates to an optical system transmittance calibration method based on optical fiber interconnection, which belongs to the technical field of optical measurement and comprises the steps of carrying out optical fiber interconnection on a receiving telescope by utilizing a photon lead formed by an optical waveguide, forming interference fringes based on integrated interference of the photon waveguide, obtaining corresponding interference fringes of a simulated remote target at different sampling positions, obtaining the angular radius of the target through testing the contrast of the interference fringes, obtaining the actual size of the target by combining the obtained angular radius and the obtained result of distance measurement, and completing the transmittance calibration of the optical system. The invention can effectively inhibit the influence of stray light on the spectrum and phase measurement of the optical system by utilizing the optical fiber interconnection system, and can realize the chromatographic measurement of the pupil by utilizing the optical fiber interconnection system, namely, the alignment condition of the pupil of the system is tested for the change of the light intensity at the edge.

Inventors

  • AN QICHANG
  • LIU XINYUE
  • LI HONGWEN

Assignees

  • 中国科学院长春光学精密机械与物理研究所

Dates

Publication Date
20260512
Application Date
20260212

Claims (5)

  1. 1. The optical system transmittance calibration method based on optical fiber interconnection is characterized by comprising the following steps of: Optical fiber interconnection is carried out on the receiving telescope by utilizing a photon lead wire formed by the optical waveguide, and interference fringes are formed based on integrated interference of the photon waveguide; Aiming at the simulation remote target, obtaining corresponding interference fringes under different sampling positions; Obtaining the angle radius of the target through testing the contrast of the interference fringes; And combining the obtained angle radius and the obtained result of distance measurement to obtain the actual size of the target, thereby completing the transmittance calibration of the optical system.
  2. 2. The method of calibrating transmittance of an optical system based on optical fiber interconnection according to claim 1, wherein the angular radius of the target is confirmed based on interference contrast between different sub-apertures.
  3. 3. The method for calibrating the transmittance of the optical system based on the optical fiber interconnection according to claim 1 or 2, wherein the sampling positions in different view field directions are adjusted by utilizing the guide rail and the turntable.
  4. 4. The method for calibrating the transmittance of an optical system based on optical fiber interconnection according to claim 1 or 2, wherein the receiving telescope receives the input light source by using an optical fiber beam combining device.
  5. 5. The method for calibrating the transmittance of an optical system based on optical fiber interconnection according to claim 1 or 2, wherein the receiving telescope changes the light emitting position by switching the optical switch.

Description

Optical system transmittance calibration method based on optical fiber interconnection Technical Field The invention relates to the technical field of optical measurement, in particular to an optical system transmittance calibration method based on optical fiber interconnection. Background The transmittance of the optical system can be represented by the ratio of the emergent light flux to the incident light flux of the tested system, and the transmittance is an important performance index for marking the intensity of the transmitted light radiation of the optical system and representing the quality of the optical system, and the size of the transmittance can influence the imaging signal-to-noise ratio. The traditional transmittance testing method for the optical system has the defects that the influence of stray light on the spectrum and the phase measurement of the optical system is large, so that the transmittance test of the optical system is inaccurate. Therefore, it is urgent to solve the above problems. Disclosure of Invention Aiming at the problem that the transmittance test of an optical system is inaccurate due to the fact that the influence of stray light on spectrum and phase measurement in the conventional optical system transmittance test method is large, the invention provides an optical system transmittance calibration method based on optical fiber interconnection. An optical system transmittance calibration method based on optical fiber interconnection comprises the following steps: Optical fiber interconnection is carried out on the receiving telescope by utilizing a photon lead wire formed by the optical waveguide, and interference fringes are formed based on integrated interference of the photon waveguide; Aiming at the simulation remote target, obtaining corresponding interference fringes under different sampling positions; Obtaining the angle radius of the target through testing the contrast of the interference fringes; And combining the obtained angle radius and the obtained result of distance measurement to obtain the actual size of the target, thereby completing the transmittance calibration of the optical system. The invention has the beneficial effects that: The invention can effectively inhibit the influence of stray light on the spectrum and phase measurement of the optical system by utilizing the optical fiber interconnection system, and can realize the chromatographic measurement of the pupil by utilizing the optical fiber interconnection system, namely, the alignment condition of the pupil of the system is tested for the change of the light intensity at the edge. Drawings FIG. 1 is a flow chart of a method for calibrating transmittance of an optical system based on optical fiber interconnection according to an embodiment of the present invention; FIG. 2 is a schematic diagram of a fiber optic combiner device; FIG. 3 is a graph showing the results of transmittance test, wherein (a) - (f) are focal plane intensities at different wavelengths, respectively; FIG. 4 is a schematic diagram of a pentaprism scan sampling; FIG. 5 is a schematic diagram of the positions of an optical fiber array and a lens array; FIG. 6 is another schematic illustration of the position of the fiber array and lens array; fig. 7 is a schematic diagram of the system optical path. Detailed Description The technical scheme of the present invention will be described in detail with reference to the accompanying drawings and preferred embodiments. Taking a main focus type large-caliber sky-patrol telescope as an example, a dislocation type curvature sensor is built in a main focus component camera terminal (two detectors respectively positioned in front of and behind a focus are used for collecting defocusing images at the same time), and the illumination intensity of a light source is set to be unsaturated. Referring to fig. 1-7, in the present embodiment, first, optical fiber interconnection is performed on the receiving telescope by using a photon lead formed by the optical waveguide, and interference fringes are formed based on integrated interference of the photon waveguide. Integrated interferometry based on photons can be achieved using a planetary interferometer. For a simulated remote target, corresponding interference fringes are obtained at different sampling positions. For example, the guide rail and turret may be used to adjust the sampling position for different field of view directions, as shown in FIG. 2. The angular radius of the target can be obtained by testing the contrast of the interference fringes. And combining the obtained angle radius and the obtained distance measurement result to obtain the actual size of the target, thereby completing the transmittance calibration of the optical system. The rear focal point is the measurement, and then the pentaprism protrudes out of a port, as shown in fig. 4, and the pass rate of the test is measured by scanning. Firstly, to ensure the phase consi