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A Method of Expanding the Field of View of Infrared Optical System Based on Wavefront Coding

An infrared optical system and wavefront coding technology, which is applied in the field of using wavefront coding imaging technology to expand the field of view of the infrared optical system, can solve the problems of small receiving area and not too large field of view of the infrared optical system, and achieve energy distribution dispersion , Conducive to measurement, the effect of expanding the field of view

Active Publication Date: 2019-02-12
HARBIN INST OF TECH
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Problems solved by technology

[0003] However, in general, the receiving area of ​​the infrared detector is relatively small, so the field of view of the general infrared optical system is not too large

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  • A Method of Expanding the Field of View of Infrared Optical System Based on Wavefront Coding
  • A Method of Expanding the Field of View of Infrared Optical System Based on Wavefront Coding
  • A Method of Expanding the Field of View of Infrared Optical System Based on Wavefront Coding

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[0022] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings, but it is not limited thereto. Any modification or equivalent replacement of the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention should be covered by the present invention. within the scope of protection.

[0023] The invention provides a method for expanding the field of view of an infrared optical system based on wavefront encoding, which specifically includes the following steps:

[0024] Step 1: Design a two-chip infrared optical system with a focal length of 208mm and F / # of 2 in the optical design software CodeV as the initial structure. The parameters of the infrared optical system are shown in Table 1. The structure diagram is as follows figure 2 Shown: The two lenses of the optical system are made of Ge, and the four optical surfaces are all sphe...

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Abstract

The invention discloses a method for extending a view field of an infrared optical system on the basis of wavefront coding. The method comprises the following steps that an odd symmetric phase mask plate is additionally arranged at a diaphragm of the infrared optical system, wavefront of the infrared optical system is modulated, a coded image is formed on a detector, decoding processing is conducted on the coded image through a digital filter means, and a final sharp image is obtained. By introducing a wavefront coding technique, the larger focal depth purpose can be achieved on the condition that the luminous flux and the imaging resolution of the infrared optical system are guaranteed, and meanwhile astigmatism, spherical aberration, chromatic aberration and aberration brought by defocus caused by installation errors and temperature changes can be inhibited. According to the method, operation is easy, and the view field of the system can be extended and the image quality can be improved on the condition that the complexity of the infrared optical system is not increased.

Description

technical field [0001] The invention relates to a method for enlarging the field of view of an infrared optical system by using a computational optics method, in particular to a method for enlarging the field of view of an infrared optical system by using wavefront coding imaging technology. Background technique [0002] In recent years, with the rapid development of science and technology, especially the progress of infrared detector technology, the emergence of new materials and the increasingly perfect manufacturing process, infrared imaging systems are more and more used in military and civilian fields. The infrared optical system is an integral and important part of the infrared imaging system. It is used to collect infrared radiation from the target and the background and converge it to the photosensitive surface of the infrared detector to form an image of the target and the background. With the continuous upgrading of infrared detector devices and the continuous impr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B27/00
CPCG02B27/0012G02B27/0025G02B27/0075
Inventor 范志刚陈守谦于佳倩陈超包春慧苗佳艺吕宁
Owner HARBIN INST OF TECH
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