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

Fabrication of electroless nickel plated aluminum freeform mirror for an infrared off-axis telescope

Not Accessible

Your library or personal account may give you access

Abstract

Freeform mirrors can be readily fabricated by a single point diamond turning (SPDT) machine. However, this machining process often leaves mid-frequency errors (MFEs) that generate undesirable diffraction effects and stray light. In this work, we propose a novel thin electroless nickel plating procedure to remove MFE on freeform surfaces. The proposed procedure has a distinct advantage over a typical thick plating method in that the machining process can be endlessly repeated until the designed mirror surface is obtained. This is of great importance because the sophisticated surface of a freeform mirror cannot be optimized by a typical SPDT machining process, which can be repeated only several times before the limited thickness of the nickel plating is consumed. We will also describe the baking process of a plated mirror to improve the hardness of the mirror surface, which is crucial for minimizing the degradation of that mirror surface that occurs during the polishing process. During the whole proposed process, the changes in surface figures and textures are monitored and cross checked by two different types of measurements, as well as by an interference pattern test. The experimental results indicate that the proposed thin electroless nickel plating procedure is very simple but powerful for removing MFEs on freeform mirror surfaces.

© 2015 Optical Society of America

Full Article  |  PDF Article
More Like This
Customized design and efficient fabrication of two freeform aluminum mirrors by single point diamond turning technique

Zhengxiang Shen, Jun Yu, Zhenzhen Song, Lu Chen, Qun Yuan, Zhishan Gao, Shixin Pei, Bo Liu, and Jingfei Ye
Appl. Opt. 58(9) 2269-2276 (2019)

Development, fabrication, and testing of an anamorphic imaging snap-together freeform telescope

Matthias Beier, Johannes Hartung, Thomas Peschel, Christoph Damm, Andreas Gebhardt, Sebastian Scheiding, Daniela Stumpf, Uwe D. Zeitner, Stefan Risse, Ramona Eberhardt, and Andreas Tünnermann
Appl. Opt. 54(12) 3530-3542 (2015)

Removal of single point diamond-turning marks by abrasive jet polishing

Z. Z. Li, J. M. Wang, X. Q. Peng, L. T. Ho, Z. Q. Yin, S. Y. Li, and C. F. Cheung
Appl. Opt. 50(16) 2458-2463 (2011)

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 (8)

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 (1)

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 (2)

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