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Fourier cascading imaging system based on multi-angle illumination and Fourier domain coded modulation

An imaging system, coding and modulation technology, applied in image acquisition, image data processing, image data processing and other directions, can solve the problems of heat dissipation and battery capacity, which restrict the miniaturization and portable design of the system, and the image reconstruction processor has a large computing load and heavy load. It can solve the problems of slow convergence speed of the construction algorithm, and achieve the effect of longer image exposure time, shorter image exposure time and easy convergence.

Pending Publication Date: 2018-06-26
成都筋斗云影视传媒有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The existing Fourier stack imaging system has the following defects: 1. The convergence speed of the solution of the reconstruction algorithm is relatively slow, the image reconstruction processor has a large computational load and high power consumption, and the heat dissipation and battery capacity problems caused by power consumption are restricted. Miniaturization and portable design of the system
2. The image reconstruction process requires many lighting angles, which puts higher requirements on the multi-angle lighting source of the imaging system. High-end products mostly use larger volume (array area) and more high-brightness LEDs (higher cost). LED array

Method used

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  • Fourier cascading imaging system based on multi-angle illumination and Fourier domain coded modulation

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Embodiment 1

[0031] image 3 It is a Fourier stack imaging system architecture of this embodiment. The key to the implementation is to add an intensity-modulated or phase-modulated baffle to the back focal plane of the objective lens 6 in the existing imaging system, and to use a vibration-based The multi-angle illumination source of the mirror 2 replaces the conventional LED array 10 .

[0032] Such as image 3 As shown, the light beam generated by LED or laser 1 is sent to scanning lens 3 by scanning galvanometer or micro-motor galvanometer 2 . The light beam converges to the rear focal plane of the condenser lens 4 through the scanning lens 3 . After passing through the condenser lens 4, it will become parallel light and shine on the object 5. By changing the angle of the galvanometer 2, the incident angle of the parallel light will be modulated, thereby producing illumination light with different incident angles. During the imaging process, the computer sends instructions to the vi...

Embodiment 2

[0035] Figure 4 It is another Fourier stack imaging system architecture of the present invention. Similar to Embodiment 1, an intensity modulation or phase modulation baffle is added to the back focal plane of the objective lens 6 in the existing imaging system; the difference is that the imaging system of this embodiment uses traditional LED The array 10 serves as a multi-angle illumination source. As mentioned above, after adding the modulation baffle of the Fourier surface, the image reconstruction process requires fewer illumination angles, so the imaging system of this embodiment has lower performance requirements for multi-angle illumination sources than the existing Fourier stack imaging system, this embodiment can use the LED array 10 with lower cost and smaller volume.

[0036] Such as Figure 4 As shown, one LED in the LED array 10 is turned on each time to illuminate the object to be imaged at a certain incident angle. For each illumination angle, the system ac...

Embodiment 3

[0038] Figure 5 It is a simplified version of the Fourier stack imaging system of the present invention, and its compact structure is suitable for customers who need to use portable imaging equipment. One LED in the LED array 10 is turned on each time to illuminate the object 5 to be imaged at a certain incident angle. For each illumination angle, the system acquires a low-resolution image of the object to be imaged, and then all the low-resolution images are synthesized into a high-resolution image in the Fourier domain. After the light beam irradiates the object 5 to be imaged, intensity modulation or phase modulation is carried out by the coding and modulation device 9 on the Fourier surface, and photoelectric conversion is completed at the CCD or CMOS image sensor 8, and the generated digital image signal is collected and buffered by the CCD or CMOS image sensor 8. It can be output to a signal processor for Fourier domain synthesis of images to obtain high-resolution ima...

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Abstract

The invention provides a Fourier cascading imaging system based on multi-angle illumination and Fourier domain coded modulation. The Fourier cascading imaging system comprises a multi-angle illumination light source and an image sensor, wherein an object to be imaged is positioned between the multi-angle illumination light source and the image sensor. The Fourier cascading imaging system also comprises a coded modulation device for a Fourier surface positioned between the image to be imaged and the image sensor. A baffle subjected to intensity modulation or phase modulation is added behind theobject to be imaged, so that the imaging system based on multi-angle illumination does not need any lens, the weight of equipment is greatly lightened, volume is reduced, cost is lowered, and the high-resolution microscopic images collected by a portable system in different occasions including field work environment and the like can be manufactured. The system also supports a high-level system composition scheme which contains optical lenses, including objective lens, tube lens and the like, and in addition, a multi-angle illumination light source design scheme with higher light beam luminance, shorter image exposure time, adjustable illumination angle and lower cost can be provided.

Description

technical field [0001] The invention relates to a microscopic imaging system based on Fourier stack imaging, in particular to a Fourier stack imaging system based on multi-angle illumination and Fourier domain coding modulation. Background technique [0002] In the traditional microscopic imaging system in the past, the resolution must be sacrificed to increase the field of view. Due to the aberration of the optical system, it is difficult to achieve high resolution and large field of view at the same time. In short, under the low-magnification microscope objective, the whole picture of the inspected object can be seen, but the resolution is very low. When changing to a high-magnification objective lens, the resolution is improved but only a small part of the object to be inspected can be seen. In order to solve the contradiction between field of view and resolution, conventional microscope systems mainly use high-magnification objective lenses and precision scanning elect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B21/36G02B21/06G06T1/00
CPCG02B21/06G02B21/361G06T1/0007
Inventor 彭琛郑国安
Owner 成都筋斗云影视传媒有限公司
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