Real-time quantification phase retrieval apparatus

A phase recovery and real-time quantitative technology, applied in the field of optical measurement, can solve the problems of reduced practicability and effectiveness, low accuracy of phase reconstruction, sacrifice of camera resolution, etc., to achieve good stability, high resolution and wide application range Effect

Inactive Publication Date: 2015-12-09
GUANGDONG OPTO MEDIC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although these methods can avoid the mechanical movement introduced by the intensity image, the accuracy of the phase reconstruction is still low, and the resolution of the camera is sacrificed, which reduces the practicality and effectiveness

Method used

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  • Real-time quantification phase retrieval apparatus

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Experimental program
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Embodiment 1

[0044] This embodiment discloses a real-time quantitative phase recovery device, its structural diagram is as follows figure 1 As shown, including the first lens 110 and the second lens 120 whose optical centers are on the same straight line, the first lens 110 and the second lens 120 are arranged in front and back, and the distance between the first lens 110 and the second lens 120 is greater than that of the second lens The focal length of 120, and ensure that the diaphragm of the system is at the front focal plane of the second lens 120. A first beam splitter 210 is disposed behind the second lens 120 , and the first beam splitter 210 is used to split the light emitted from the second lens 120 . At the rear focal point of the second lens 120, a first CCD image sensor 310 is arranged to capture the light passing through the first beam splitter 210; at the lower end of the first beam splitter 210, a second CCD image sensor 320 is arranged to use to capture the light reflecte...

Embodiment 2

[0058] In order to reduce the volume of the device, this embodiment improves on the basis of Embodiment 1, and proposes the following Figure 4 scheme shown. Specifically, the first speed divider 210 is moved between the first lens 110 and the second lens 120 , and the first mirror 410 and the third lens 130 that cooperate with the second CCD image sensor 320 are added. The first speed divider 210 splits the light passing through the first lens 110 (transmitted light and reflected light), and after the transmitted light enters the second lens 120, it enters the first CCD image sensor 310; the reflected light passes through the first mirror 410 and the third lens 130 then enter the second CCD image sensor 320 . In this arrangement, the optical path is changed by the reflector, which makes the whole device more compact and reduces the volume of the whole device.

[0059] In practical applications, in order to ensure that the images captured by the first CCD image sensor 310 an...

Embodiment 3

[0062] In order to improve the precision and accuracy of the phase recovery results, this embodiment improves Embodiment 2, see Figure 5 , the device adds an optical path and a CCD image sensor, and the device captures three images, and calculates through the three images, which greatly improves the accuracy and accuracy of the calculation results.

[0063] Specifically, the second beam splitter 220 is set between the first beam splitter 210 and the first lens 110, and the second reflector 420 and the fourth lens 140 are set to cooperate with the second beam splitter 220 at the same time. Behind the lens 140 is arranged a third CCD image sensor 330 for capturing over-focus images.

[0064] The device of this embodiment captures three images, which are respectively the in-focus image captured by the first CCD image sensor 310, the under-focus image captured by the second CCD image sensor 320, and the captured image obtained by the third CCD image sensor 330. In order to match...

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Abstract

The invention discloses a real time quantification phase retrieval apparatus. The real time quantification phase retrieval apparatus is coordinated with an imaging device, and comprises a first lens assembly and a second lens assembly, wherein the optical center of the first lens assembly and the optical center of the second lens assembly are arranged on the same straight line; the first lens assembly and the second lens assembly are arranged back and forth; the imaging device performs imaging at the front focus position of the first lens assembly; the real time quantification phase retrieval apparatus also includes at least one beam splitter and at least two CCD image sensors for capturing the light after beam splitting by a beam splitter, wherein one of the CCD image sensors is located at the back focus position of the second lens assembly to capture a positive image; other CCD image sensors capture the under-focused or over-focused image; the positive image is geometrically symmetrically with the under-focused image or the over-focused image; and the size of the positive image is identical to the size of the under-focused image or the over-focused image. The real time quantification phase retrieval apparatus has no requirement for performing mechanical moving or adjusting during the light intensity image acquisition process, and is high in stability, and can retrieve the quantification phase information, and is suitable for any imaging systems, and is high in resolution.

Description

technical field [0001] The invention relates to the field of optical measurement, in particular to a real-time quantitative phase recovery device. Background technique [0002] Complete light field information includes light intensity information and phase information. Current photosensitive devices (such as CCD, etc.) can only detect the intensity information of the light field. Therefore, how to calculate the phase distribution of the light field from the intensity information is an important topic in the development of modern optics. In the prior art, methods for extracting phase distribution from light field intensity information are roughly divided into two categories, iterative method and direct extraction method. For example, the phase recovery algorithm based on the light intensity transmission equation (TIE: TransportofIntensityEquation) is one of the direct extraction methods. . [0003] The basic principle of the TIE algorithm is to use the light intensity chan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J9/00
Inventor 王翰林刘满林任均宇安昕张浠
Owner GUANGDONG OPTO MEDIC TECH CO LTD
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