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Large-depth-of-field observation receiving system based on non-rotational symmetric phase plate

A non-rotationally symmetric, receiving system technology, applied in the optical field, can solve problems such as lack of mature technology, and achieve the effect of large depth of field expansion, increased depth of field, and small PSF offset effect.

Inactive Publication Date: 2020-03-27
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
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  • Large-depth-of-field observation receiving system based on non-rotational symmetric phase plate
  • Large-depth-of-field observation receiving system based on non-rotational symmetric phase plate
  • Large-depth-of-field observation receiving system based on non-rotational symmetric phase plate

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Embodiment Construction

[0020] In order to solve the existing technical problems, the present invention provides a non-rotationally symmetrical phase plate and a method for expanding the depth of field of an imaging system based on the phase plate. This method can effectively reduce the defocus sensitivity of the imaging system without sacrificing the resolution and light throughput, thereby expanding the depth of field of the system.

[0021] In order to achieve the above object, the technical solution adopted in the present invention is: a large depth of field observation and receiving system, including an imaging lens, a phase plate and a detection decoding unit; The aperture of the system realizes the wavefront encoding; the output signal of the detector passes through the video decoding unit, and the encoded blurred image is restored by the decoding algorithm.

[0022] On the basis of the classic cubic phase plate, the present invention provides a non-rotationally symmetrical phase plate formed ...

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Abstract

The invention belongs to the field of optics, and aims to effectively reduce the defocusing sensitivity of an imaging system on the premise of not sacrificing resolution and light flux, thereby expanding the depth of field of the system. Therefore, the technical scheme adopted by the invention is as follows: the large-depth-of-field observation receiving system based on the non-rotational symmetric phase plate comprises an imaging lens, a phase plate and a detection decoding unit; the phase plate and the imaging lens are separately arranged and are located on the same optical axis; the phase plate is used as a diaphragm of the imaging system to realize wavefront coding; and an output signal of the detector passes through the video decoding unit, and the coded blurred image is recovered byusing a decoding algorithm. The system is mainly applied to video detection and depth-of-field processing occasions.

Description

technical field [0001] The invention belongs to the field of optics, and relates to a phase plate and an imaging system based on the phase plate, in particular to a non-rotationally symmetrical phase plate for expanding the depth of field of an optical system and a large depth of field observation and receiving system using the phase plate. Background technique [0002] In order to improve the scope and fineness of observation, it is generally required that the imaging system has a higher resolution and a larger depth of field at the same time. The effect of expanding the depth of field can be achieved by reducing the relative aperture of the imaging system, but the resolution and illumination of the system are reduced; the multi-defocus image synthesis method will increase the hardware size and take a long time, so it cannot be applied to a small-volume imaging system. [0003] Wavefront encoding technology combines image processing with optical design, and adds a phase mas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/30H04N5/225G02B27/00
CPCG02B5/3083G02B27/0012H04N23/55
Inventor 谢洪波杨磊赵满朱猛毛晨盛李金龙王珊珊
Owner TIANJIN UNIV
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