Shape measurement method of concave mirrors

Miroslav Pech; Miroslav Hrabovský; Petr Schovánek; Dušan Mandát; Libor Nožka

doi:10.1117/12.739671

12 April 2007 Shape measurement method of concave mirrors

Miroslav Pech, Miroslav Hrabovský, Petr Schovánek, Dušan Mandát, Libor Nožka

Proceedings Volume 6609, 15th Czech-Polish-Slovak Conference on Wave and Quantum Aspects of Contemporary Optics; 660918 (2007) https://doi.org/10.1117/12.739671
Event: 15th Czech-Polish-Slovak Conference on Wave and Quantum Aspects of Contemporary Optics, 2006, Liberec, Czech Republic

Abstract

The theory, optical, mechanical, and software design for a special Hartmann wavefront analyzer is presented. This method is applied for the non-contact method of concave mirrors shape measurements. The so-called Hartmann test is used with the digital image reading and the fast computer data evaluation. In this method a small mask with several holes is used. Holes are radially positioned. The wavefront sensor measures a tilt of the wavefront or the mirror surface. The tilt measurements are then converted into a replica of the wavefront by performing a form of integration called wavefront reconstruction. Our institute Joint Laboratory of Optics produces segmented mirrors for the Pierre Auger observatory fluorescent detector. We use this method as the qualitative measuring of this spherical mirror segments. These segments are unique because they are light and ultrathin. The production of mirrors is based on standard operations commonly used in the optical industry (cutting, drilling, milling, grinding and polishing), with the difference that they are extremely thin. This fact can cause segment shape instability in the production process. This method objectively defines the shape and specifies the difference of the segment shape from an ideal surface in micrometer accuracy.

Citation Download Citation

Miroslav Pech, Miroslav Hrabovský, Petr Schovánek, Dušan Mandát, and Libor Nožka "Shape measurement method of concave mirrors", Proc. SPIE 6609, 15th Czech-Polish-Slovak Conference on Wave and Quantum Aspects of Contemporary Optics, 660918 (12 April 2007); https://doi.org/10.1117/12.739671

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
5 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Mirrors

Wavefronts

Sensors

Digital image processing

Wavefront sensors

Space telescopes

Wavefront reconstruction

Show All Keywords

Keywords/Phrases

Search In:

Publication Years