Title:
EXPOSURE SURFACE CALIBRATION METHOD AND APPARATUS FOR OPTICAL SYSTEM, CALIBRATION MEASUREMENT METHOD AND APPARATUS, COMPUTER DEVICE, AND STORAGE MEDIUM
Document Type and Number:
WIPO Patent Application WO/2023/001306
Kind Code:
A1
Abstract:
The present application discloses an exposure surface calibration method and apparatus for an optical system, a computer device, and a storage medium. The method comprises: performing flat-field correction on a photographing module by using a reference light source; obtaining a grayscale distribution image generated by photographing an exposure surface of an optical system by the photographing module; segmenting the grayscale distribution image into a mesh image comprising a plurality of segmented regions, and calculating the fitting grayscale value of each segmented region; selecting a minimum fitting grayscale value from all the calculated fitting grayscale values as a reference grayscale value, and according to the reference grayscale value, calculating a grayscale compensation coefficient corresponding to the other segmented regions so as to generate a digital mask; and using the digital mask to perform mask compensation on a light projection image emitted by the optical system so as to obtain a printed image of the exposure surface having a uniform irradiance value. By obtaining the pixel-level distribution of the exposure surface, and performing corresponding compensation on the grayscale value, the present application can improve the calibration accuracy and calibration efficiency of the exposure surface of the optical system. The present application further discloses a calibration measurement method for 3D printing. According to the calibration measurement method for 3D printing, by measuring a plurality of parameters of the optical system, it can be determined that the parameters of the optical system satisfy the requirements in a 3D printing process, so that a clear image completely similar to an object can be generated, and thus, more accurate and efficient 3D printing is achieved.
Inventors:
DING PENG (CN)
HU JUN (CN)
ZENG HONGQING (CN)
WAN XIN (CN)
XU BIN (CN)
HU JUN (CN)
ZENG HONGQING (CN)
WAN XIN (CN)
XU BIN (CN)
Application Number:
PCT/CN2022/107529
Publication Date:
January 26, 2023
Filing Date:
July 22, 2022
Export Citation:
Assignee:
GUANGZHOU HEYGEARS IMC INC (CN)
International Classes:
G06T5/00
Foreign References:
| CN113469918A | 2021-10-01 | |||
| CN113034382A | 2021-06-25 | |||
| CN209176181U | 2019-07-30 | |||
| CN113103587A | 2021-07-13 | |||
| US20090244329A1 | 2009-10-01 |
Attorney, Agent or Firm:
CHOFN INTELLECTUAL PROPERTY (CN)
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