Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Reference-free beam-sampling system for freeform surface measurements

Not Accessible

Your library or personal account may give you access

Abstract

Freeform optical elements have wide applications in optics, manufacturing, and precision industries. Due to the diversity of the nonrotationally symmetrical nature of a surface profile, few noncontact measurement techniques have been proposed or reported. This paper proposes and develops a new reference-free beam-sampling (RFBS) methodology and system for this particular application. The RFBS system uses the beam itself as an optical probe to sample the surface. Through introducing lateral disturbance to the modulated beam, the curvature matrix of the sample is measured. Simulation and experiments have been conducted to investigate the method’s capability and study the configuration, so as to optimize the system. It is shown that a tens of nanometers measurement accuracy is achieved, even for surfaces with a peak valley value of more than 1 mm. The feasibility and effectiveness of the RFBS methodology is proven.

© 2014 Optical Society of America

Full Article  |  PDF Article
More Like This
Adaptive centroid-finding algorithm for freeform surface measurements

Wenjiang Guo, Liping Zhao, Chin Shi Tong, Chen I-Ming, and Sunil Chandrakant Joshi
Appl. Opt. 52(10) D75-D83 (2013)

Virtual interferometer calibration method of a non-null interferometer for freeform surface measurements

Qun Hao, Shaopu Wang, Yao Hu, Hanglin Cheng, Meng Chen, and Tengfei Li
Appl. Opt. 55(35) 9992-10001 (2016)

Robust and accurate measurement of optical freeform surfaces with wavefront deformation correction

Haoyu Lyu, Lingbao Kong, Shixiang Wang, and Min Xu
Opt. Express 30(5) 7831-7844 (2022)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (14)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Tables (3)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (1)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved