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Infrared digital holographic phase extraction-based cultural relic three-dimensional shape reconstruction device and method

A technology of phase extraction and digital holography, which is applied in the direction of measuring devices, optical devices, instruments, etc., can solve the problems of inconvenient viewing, single-site exhibition of cultural relics, and high difficulty of protection, and meet the requirements of reducing environmental stability, clear details, and Apply high-value effects

Active Publication Date: 2022-03-04
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]For the protection of cultural relics, although the country has spent a lot of effort, there are still no good protection measures because of factors such as difficult protection and easy damage. Even the cultural relics exhibited in museums cannot avoid the problem of damage; each precious cultural relic is unique, and secondly, it is difficult to move and transport cultural relics, so that cultural relics can only be exhibited in a single place, which brings great inconvenience to everyone’s appreciation. Difficulty, inconvenient to watch

Method used

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  • Infrared digital holographic phase extraction-based cultural relic three-dimensional shape reconstruction device and method
  • Infrared digital holographic phase extraction-based cultural relic three-dimensional shape reconstruction device and method
  • Infrared digital holographic phase extraction-based cultural relic three-dimensional shape reconstruction device and method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Such as figure 1 As shown, the three-dimensional appearance reconstruction device for cultural relics with infrared digital holographic phase extraction includes a light-tight casing 17, and an infrared laser 1, a beam splitter I2, an infrared fiber coupler 3, and a beam expander I4 are arranged in the light-tight casing 17 , beam expander II5, pinhole filter I6, pinhole filter II7, lens I8, lens II9, lens III10, lens IV11, total reflection mirror 12, beam splitter II13, image acquisition device 14; figure 2 As shown, an infrared window I15 and an infrared window II16 are arranged on the side wall of the light-tight casing 17; the object to be measured 18 is located outside the light-tight casing 17 and on the automatic rotating platform 19 at the infrared window I15; the image acquisition device 14 Connect with computer 20;

[0051] The beam splitter I2 is located on the transmission path of the beam emitted by the infrared laser 1, and the beam emitted by the infrar...

Embodiment 2

[0078] The structure of this embodiment is the same as that of Embodiment 1, the difference is that the cultural relics of Embodiment 1 are replaced by glass pendants, which does not affect the function realization of the entire device.

[0079] The specific identification steps are as follows:

[0080]Step 1: Place the object to be measured on the automatic rotating platform 19, select the best reflection distance, and determine the optical path of the object light; the optical path of the object light is equal to that of the reference light, select the corresponding optical fiber length according to the optical path of the object light, and adjust the optical path of the experiment.

[0081] Step 2: Turn on the infrared laser 1, and use the image acquisition device 14 to collect the infrared holographic stripes of the target object generated on the beam splitter II 13 after the laser is stabilized, such as figure 2 shown.

[0082] Step 3: The automatic rotating platform 19...

Embodiment 3

[0088] The structure of this embodiment is the same as that of Embodiment 1, the difference is that the cultural relics of Embodiment 1 are replaced by cartoon models with more complex shape information, which does not affect the function realization of the entire device.

[0089] The specific identification steps are as follows:

[0090] Step 1: Place the object to be measured on the automatic rotating platform 19, select the best reflection distance, and determine the optical path of the object light; the optical path of the object light is equal to that of the reference light, select the corresponding optical fiber length according to the optical path of the object light, and adjust the optical path of the experiment.

[0091] Step 2: Turn on the infrared laser 1, and use the image acquisition device 14 to collect the infrared holographic stripes of the target object generated on the beam splitter II 13 after the laser is stable.

[0092] Step 3: The automatic rotating plat...

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Abstract

The invention discloses a cultural relic three-dimensional shape reconstruction device and method based on infrared digital holographic phase extraction. A light beam emitted by an infrared laser is divided into two beams; the first laser beam becomes parallel light as a reference light beam; the second laser beam becomes parallel light and irradiates an object to be measured, and the reflected light beam becomes an object light beam; the object light beam and the reference light beam form an infrared holographic interference pattern on the beam splitter, and the infrared holographic interference pattern is received and recorded by the image acquisition device and then is transmitted to the computer for storage and reproduction, so that a hologram containing three-dimensional phase information of a part of an object to be measured is recorded; and after the automatic rotating platform rotates, collecting again until all information is collected, performing image processing and splicing, restoring complete phase information of the to-be-measured object, and reconstructing a three-dimensional shape. The infrared digital holographic technology is used for three-dimensional shape reconstruction of the cultural relics, it can be guaranteed that phase information of the cultural relics is accurately extracted, and the resistance of the phase extraction device to various interferences is improved.

Description

technical field [0001] The invention discloses an infrared digital holographic phase extraction device and method for three-dimensional shape reconstruction of cultural relics, belonging to the field of infrared digital holographic applications. Background technique [0002] In recent years, the country has paid more and more attention to the protection of cultural relics, but cultural relics protection has repeatedly encountered problems such as theft of cultural relics, damage due to disasters, and man-made destruction. The wavelength of ordinary visible light is between 400nm and 700nm. Ultraviolet rays below 400nm have a lot of energy and are easily absorbed by objects, thereby deteriorating objects; while infrared rays above 700nm have small energy and are not easily absorbed by objects. Safety. Materials such as wood, plants, and silk are high-molecular structures, containing cellulose or protein, and are easily deteriorated and damaged by light, electricity, and bact...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B9/021G03H1/02G03H1/00G03H1/04
CPCG01B9/021G03H1/02G03H2001/0033G03H2001/0212G03H2001/0436
Inventor 张永安赖本林张亚萍赵航
Owner KUNMING UNIV OF SCI & TECH
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