Tricolor recording layered reproduced dynamic hologram recording device
A recording device and hologram technology, applied in the direction of instruments, etc., can solve the problems such as difficult parameter matching and adjustment, complicated recording device, inconvenient system parameter calibration and measurement state adjustment, etc.
Inactive Publication Date: 2011-11-02
SHANGHAI UNIV
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The disadvantage of this method is that the parameter matching and adjustment between each channel is not easy to realize; the other is to use a single CCD to record the information, but in order to carry out the spectrum separation of multiple channels of information in the subsequent signal processing, the recording device is very complicated. It brings great inconvenience to system parameter calibration and measurement state adjustment
In contrast, the method of using a single CCD is more practical, but to really become a practical technology, the problem to be solved is: when a single CCD is used to record multiple (such as three) signals simultaneously, how to ensure that the multi-channel information can Reducing the complexity of the recording device under the condition of separation in the subsequent processing, so as to meet the dynamics and practicality of the measurement method
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[0019] A preferred embodiment of the present invention is described in detail as follows in conjunction with accompanying drawing: See figure 2 , figure 2 The shown three-color recording layered reproduction dynamic holographic recording device consists of three lasers 1, 2, 3, three beam expanders 4, 5, four plane mirrors, three Fresnel double prisms 7, two two Chromatic mirrors 10, 11, a color CCD camera 12 and a computer 13 form. Three beam expanders 4,5 and three Fresnel double prisms 7 in the three beam paths are distributed on six sides of a regular hexagon in the space plane, and three Fresnel double prisms 7 are placed on the six sides On the three adjacent sides of the hexagon, three beam expander assemblies 4, 5 are placed on the other three adjacent sides of the hexagon, and a Fresnel double prism 7 and a spatial filter 4 are opposite to each other. A negative lens 5 constitutes a guide device for a beam of light path; wherein the beam expander components 4, 5 o...
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The invention relates to a tricolor recording layered reproduced dynamic hologram recording device. The device is composed of three lasers, three beam expanding components, three Fresnel biprisms, a colour CCD (charge coupled device) camera and a computer. When the lights emitted by the three lasers respectively pass through the beam expanding components, part of the lights pass through an object to be measured and interferes with the object under the action of the Fresnel biprisms, and then the formed information can be recorded by the CCD camera; and finally, the computer can work out the dynamic information of the outline and internal structure of the object to be measured through a tomography algorithm. The recording device is a three-direction multi-frequency light coaxial digital hologram recording system and can respectively record the hologram information from different directions simultaneously; and meanwhile, the recording device can be used for realizing the dynamic deformation detection on the outline and internal fine structure of a transparent object or a projector object by adopting the tomography algorithm.
Description
technical field [0001] The invention relates to a hologram recording device, in particular to a three-color recording and layered reproduction dynamic hologram recording device. In the device, light of three different frequencies passes through an object from three directions in space, and the three groups of holographic signals formed are simultaneously It is recorded by a color CCD, and uses the method of color layering to realize the separation of three-way information. Background technique [0002] The invention relates to a digital holographic tomography technology, which is a technical method for tomographic imaging of transparent or transmissive objects, which combines the technical characteristics of digital holographic technology and optical tomography. A basic condition for realizing object information reconstruction based on this technology is to obtain holographic information of objects projected from different directions. In order to measure dynamic objects, it...
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IPC IPC(8): G03H1/12
Inventor 于瀛洁刘均琦唐智刘祎庆
Owner SHANGHAI UNIV