Bibliographic Details
| Title: |
Design and Calibration of a Slit Light Source for Infrared Deflectometry |
| Authors: |
Lu Ye, Xiangchao Zhang, Min Xu, Wei Wang |
| Source: |
Sensors, Vol 25, Iss 3, p 944 (2025) |
| Publisher Information: |
MDPI AG, 2025. |
| Publication Year: |
2025 |
| Collection: |
LCC:Chemical technology |
| Subject Terms: |
optical measurement, infrared deflectometry, aspherical surface, grinding, camera calibration, Chemical technology, TP1-1185 |
| More Details: |
Infrared deflectometry is an efficient and accurate measuring method for curved surfaces fabricated via grinding or finish milling. The emitting properties and geometrical configurations of the infrared light source is a core component governing the measurement performance. In this paper, an infrared slit light source is designed based on the cavity structure of a polyimide heating film. This design ensures good stability and uniformity of the light source whilst effectively reducing background noise. Additionally, the light source can be applied as a calibration board for calibrating infrared cameras. The light source is aligned using a theodolite and cubic prism to control the positional deviations during scanning. Experimental results demonstrate that the proposed slit light source and calibration method can achieve a measurement accuracy of 1 µm RMS, which can meet the needs of rapid measurement in grinding. This approach provides a reliable, cost-effective, and efficient tool for surface quality assessments in optical workshops and has a broad application potential. |
| Document Type: |
article |
| File Description: |
electronic resource |
| Language: |
English |
| ISSN: |
1424-8220 |
| Relation: |
https://www.mdpi.com/1424-8220/25/3/944; https://doaj.org/toc/1424-8220 |
| DOI: |
10.3390/s25030944 |
| Access URL: |
https://doaj.org/article/094c4cf10e5c48c68e154b3edea30d1f |
| Accession Number: |
edsdoj.094c4cf10e5c48c68e154b3edea30d1f |
| Database: |
Directory of Open Access Journals |
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