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A light projection device and calibration method thereof

A technology of projection device and calibration method, applied in the field of light projection, to achieve fast projection speed, ensure coincidence accuracy, and compact structure

Inactive Publication Date: 2018-05-18
耿得力
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the application of DMD technology in this printing device still does not break through the above-mentioned limitations and defects.

Method used

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  • A light projection device and calibration method thereof
  • A light projection device and calibration method thereof
  • A light projection device and calibration method thereof

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0033] Such as figure 1 As shown, a light projection device includes a grating projection device 1 and a vector projection device 2, the projection surface of the grating projection device 1 and the projection surface of the vector projection device 2 are on the same plane, and the plane is the projection working surface 8 , in the projection work surface 8 , the projection range 5 of the grating projection device and the projection range 6 of the vector projection device overlap, and the overlapped area is a projection work area 81 .

[0034] The light projection device also includes an image sensing device 3, the image sensing device 3, the grating projection device 1 and the vector projection device 2 are installed on the same mounting bracket 4; in the projection working surface 8, the The sensing range 7 of the image sensing device includ...

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Abstract

The invention belongs to the technical field of light projecting, and relates to a light projecting device and a calibrating method thereof. The light projecting device comprises a grating projecting device body and a vector projecting device body. A projecting plane of the grating projecting device body and a projecting plane of the vector projecting device body are on the same plane, and the plane is a projecting working plane; in the projecting working plane, the grating projecting device body and the vector projecting device body are coincident in the projecting range. The light projecting device further comprises an image sensing device. The calibrating method of the light projecting device includes the steps of sequentially obtaining a projecting image P, a vector scanning area V, an incomplete grating projecting image PM, a complete grating projecting image PR and a vector scanning image PV; determining a projecting superposition error through comparing the complete grating projecting image PR and the vector scanning image PV; precorrecting an input graph of the grating projecting device body and an input graph of the vector projecting device body. According to the light projecting device and the calibrating method thereof, grating projecting and vector scanning are combined, the defect of the prior art is overcome, and the long-time coincident accuracy of projecting can be guaranteed.

Description

technical field [0001] The invention belongs to the field of light projection technology, and in particular relates to a light projection device and a calibration method thereof. Background technique [0002] The light projection device, especially the ultraviolet light projection device, is a key component of photo-curing molding, and its parameters such as precision, strength, resolution, and coverage size directly determine the overall performance of photo-curing molding. [0003] Currently, grating DMD (Digital Micromirror Device, digital micromirror device) device projection and vector laser galvanometer scanning are widely used. The grating DMD projection speed is not affected by the complexity of the projection shape, but its surface smoothness is limited by the resolution of the DMD device, and the high-resolution DMD device is relatively expensive; laser galvanometer scanning can provide a smoother profile, but its scanning The time rises with the complexity of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N9/31
CPCH04N9/3141H04N9/3185
Inventor 耿得力
Owner 耿得力
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